{"id":14716,"date":"2024-11-23T00:24:45","date_gmt":"2024-11-23T08:24:45","guid":{"rendered":"https:\/\/chansmachining.com\/tvrde-eloxovani-rychly-pruvodce-jak-se-to-naucit\/"},"modified":"2024-12-17T19:36:44","modified_gmt":"2024-12-18T03:36:44","slug":"tvrde-eloxovani-rychly-pruvodce-jak-se-to-naucit","status":"publish","type":"post","link":"https:\/\/chansmachining.com\/cs\/tvrde-eloxovani-rychly-pruvodce-jak-se-to-naucit\/","title":{"rendered":"Tvrd\u00e9 eloxov\u00e1n\u00ed: Rychl\u00fd pr\u016fvodce, jak se to nau\u010dit"},"content":{"rendered":"\n

Co je to eloxov\u00e1n\u00ed tvrdou vrstvou?<\/strong><\/h2>\n
\n
\"Eloxování<\/figure><\/div>\n

Eloxov\u00e1n\u00ed tvrd\u00fdm povlakem, zn\u00e1m\u00e9 tak\u00e9 jako eloxov\u00e1n\u00ed typu III, je \u0161pi\u010dkov\u00e1 elektrochemick\u00e1 technika, kter\u00e1 zlep\u0161uje povrchov\u00e9 vlastnosti hlin\u00edku a jin\u00fdch ne\u017eelezn\u00fdch kov\u016f.<\/strong> Tato metoda vytv\u00e1\u0159\u00ed siln\u00fd a trval\u00fd povlak oxidu hlinit\u00e9ho, kter\u00fd v\u00fdrazn\u011b zvy\u0161uje tvrdost materi\u00e1lu, odolnost proti opot\u0159eben\u00ed a korozi.<\/p>\n\n

Jak\u00fd je proces eloxov\u00e1n\u00ed tvrdou vrstvou?<\/strong><\/h2>\n
\n
\"proces<\/figure><\/div>\n

Metoda eloxov\u00e1n\u00ed Hardcoat je specializovan\u00e1 elektrick\u00e1 \u00faprava, p\u0159i n\u00ed\u017e se na hlin\u00edku a jeho slitin\u00e1ch vytv\u00e1\u0159\u00ed siln\u00e1, pevn\u00e1 a v\u016f\u010di korozi odoln\u00e1 vrstva oxidu.<\/strong> Povrchov\u00e9 vlastnosti materi\u00e1lu se t\u00edmto procesem v\u00fdrazn\u011b zlep\u0161uj\u00ed, co\u017e je ide\u00e1ln\u00ed pro n\u00e1ro\u010dn\u00e9 pou\u017eit\u00ed v mnoha pr\u016fmyslov\u00fdch odv\u011btv\u00edch.<\/p>\n\n

Krok 1: P\u0159\u00edprava povrchu<\/strong>:<\/h3>\n\n

Alkalick\u00fd roztok se pou\u017e\u00edv\u00e1 k \u00fapln\u00e9mu vy\u010di\u0161t\u011bn\u00ed hlin\u00edkov\u00e9ho d\u00edlu a odstran\u011bn\u00ed ne\u010distot, jako je mastnota a \u0161p\u00edna. Tento krok je z\u00e1sadn\u00ed pro dosa\u017een\u00ed vysoce kvalitn\u00edho eloxovan\u00e9ho povrchu.<\/p>\n\n

P\u0159edm\u011bt m\u016f\u017ee b\u00fdt lept\u00e1n kyselinou, aby se odstranily v\u0161echny p\u0159irozen\u011b se vyskytuj\u00edc\u00ed vrstvy oxid\u016f, \u010d\u00edm\u017e vznikne homogenn\u00ed povrch, kter\u00fd zlep\u0161uje p\u0159ilnavost eloxovan\u00e9ho povlaku.<\/p>\n\n

Krok 2: eloxovac\u00ed l\u00e1ze\u0148<\/strong><\/h3>\n\n

Vy\u010di\u0161t\u011bn\u00e1 hlin\u00edkov\u00e1 \u010d\u00e1st se pono\u0159\u00ed do l\u00e1zn\u011b s elektrolytem kyseliny s\u00edrov\u00e9, kter\u00e1 se obvykle udr\u017euje p\u0159i n\u00edzk\u00fdch teplot\u00e1ch (28\u00b0F a\u017e 32\u00b0F). Tato \u0159\u00edzen\u00e1 atmosf\u00e9ra je nutn\u00e1 k dosa\u017een\u00ed \u017e\u00e1douc\u00edch vlastnost\u00ed eloxovan\u00e9 vrstvy.<\/p>\n\n

Krok 3: P\u0159iveden\u00ed elektrick\u00e9ho proudu<\/strong><\/h3>\n\n

L\u00e1zn\u00ed prot\u00e9k\u00e1 elektrick\u00fd proud, p\u0159i\u010dem\u017e hlin\u00edk slou\u017e\u00ed jako anoda. T\u00edm se spust\u00ed elektrochemick\u00e1 reakce, jej\u00edm\u017e v\u00fdsledkem je siln\u00e1 vrstva oxidu hlinit\u00e9ho na povrchu. Nap\u011bt\u00ed obvykle za\u010d\u00edn\u00e1 kolem 25 V a m\u016f\u017ee nar\u016fst a\u017e na 120 V, jak se anodick\u00e1 vrstva zesiluje.<\/p>\n\n

Krok 4: Kontrolovan\u00e9 podm\u00ednky<\/strong><\/h3>\n\n

Tvrd\u00e9 eloxov\u00e1n\u00ed vy\u017eaduje ur\u010dit\u00e9 teplotn\u00ed podm\u00ednky a hustotu proudu (\u010dasto 24 a\u017e 40 amp\u00e9r\u016f na \u010dtvere\u010dn\u00ed stopu). Tyto faktory jsou rozhoduj\u00edc\u00ed pro vytvo\u0159en\u00ed siln\u011bj\u0161\u00edho, hust\u0161\u00edho a m\u00e9n\u011b por\u00e9zn\u00edho oxidov\u00e9ho povlaku ne\u017e u tradi\u010dn\u00edch metod eloxov\u00e1n\u00ed.<\/p>\n\n

Krok 5: T\u011bsn\u011bn\u00ed<\/strong><\/h3>\n\n

Po dosa\u017een\u00ed po\u017eadovan\u00e9 tlou\u0161\u0165ky eloxovan\u00e9 vrstvy (13 a\u017e 150 mikrometr\u016f) se p\u0159edm\u011bt vyjme z l\u00e1zn\u011b a ut\u011bsn\u00ed, aby se uzav\u0159ely p\u0159\u00edpadn\u00e9 mezery v oxidov\u00e9 vrstv\u011b. Tato technika ut\u011bsn\u011bn\u00ed \u010dasto zahrnuje pono\u0159en\u00ed do vrouc\u00ed deionizovan\u00e9 vody nebo chemick\u00e9ho ut\u011bs\u0148ovac\u00edho roztoku, kter\u00fd zlep\u0161uje odolnost proti korozi a udr\u017een\u00ed barvy, je-li pot\u0159eba zabarven\u00ed.<\/p>\n\n

Krok 6: Z\u00e1v\u011bre\u010dn\u00e9 opl\u00e1chnut\u00ed a su\u0161en\u00ed<\/strong><\/h3>\n\n

Po ut\u011bsn\u011bn\u00ed se d\u00edl znovu opl\u00e1chne, aby se odstranily zbytky chemik\u00e1li\u00ed, a pot\u00e9 se vysu\u0161\u00ed a p\u0159iprav\u00ed k pou\u017eit\u00ed nebo dal\u0161\u00edmu zpracov\u00e1n\u00ed.<\/p>\n\n

Jak\u00e9 jsou vlastnosti a rysy eloxov\u00e1n\u00ed povrchovou \u00fapravou?<\/strong><\/h2>\n
\n
\"eloxování<\/figure><\/div>\n

Tvrd\u00e9 eloxov\u00e1n\u00ed zlep\u0161uje povrchov\u00e9 vlastnosti hlin\u00edku a jeho slitin vytvo\u0159en\u00edm siln\u00e9 a odoln\u00e9 vrstvy oxidu. Tato \u00faprava poskytuje n\u011bkolik charakteristick\u00fdch vlastnost\u00ed a rys\u016f, kter\u00e9 ji \u010din\u00ed vhodnou pro r\u016fzn\u00e9 pr\u016fmyslov\u00e9 aplikace.<\/p>\n\n

Tlou\u0161\u0165ka<\/strong><\/h3>\n\n

Tvrd\u00e9 eloxov\u00e1n\u00ed vytv\u00e1\u0159\u00ed eloxovan\u00fd povlak, kter\u00fd je obvykle 13 a\u017e 150 mikrometr\u016f (0,0005″ a\u017e 0,006″) <\/strong>tlust\u0161\u00ed ne\u017e jin\u00e9 formy eloxov\u00e1n\u00ed. Pro srovn\u00e1n\u00ed, eloxov\u00e1n\u00ed typu II m\u00e1 obvykle tlou\u0161\u0165ku 5 a\u017e 25 mikrometr\u016f (0,0002″ a\u017e 0,001″. V\u011bt\u0161\u00ed tlou\u0161\u0165ka zlep\u0161uje odolnost proti korozi a opot\u0159eben\u00ed.<\/p>\n\n

Tvrdost a odolnost proti opot\u0159eben\u00ed<\/strong><\/h3>\n\n

Tvrd\u00e9 eloxovan\u00e9 povlaky maj\u00ed \u010dasto Vickersovu tvrdost (HV) 400 a\u017e 600<\/strong>, tak\u017ee jsou v\u00fdrazn\u011b tvrd\u0161\u00ed ne\u017e b\u011b\u017en\u00e9 eloxovan\u00e9 vrstvy s HV 200 a\u017e 400. Tato tvrdost se prom\u00edt\u00e1 do mimo\u0159\u00e1dn\u00e9 odolnosti proti opot\u0159eben\u00ed – tvrd\u011b eloxovan\u00e9 povrchy mohou b\u00fdt t\u00e9m\u011b\u0159 desetkr\u00e1t odoln\u011bj\u0161\u00ed proti opot\u0159eben\u00ed ne\u017e standardn\u011b eloxovan\u00fd hlin\u00edk.<\/p>\n\n

Odolnost proti korozi<\/strong><\/h3>\n\n

Tvrd\u00e1 eloxovac\u00ed vrstva v\u00fdrazn\u011b zvy\u0161uje odolnost proti korozi, p\u0159i\u010dem\u017e povlaky \u010dasto vydr\u017e\u00ed v\u00edce ne\u017e 1000 hodin v testu solnou mlhou (ASTM B117).<\/strong> Siln\u011bj\u0161\u00ed vrstva oxidu \u00fasp\u011b\u0161n\u011b chr\u00e1n\u00ed hlin\u00edk pod n\u00ed p\u0159ed oxidac\u00ed a po\u0161kozen\u00edm vlivem prost\u0159ed\u00ed.<\/p>\n\n

Elektrick\u00e9 vlastnosti<\/strong><\/h3>\n\n

Oxidov\u00e1 vrstva, kter\u00e1 vznik\u00e1 p\u0159i tvrd\u00e9m eloxov\u00e1n\u00ed, m\u00e1 dobr\u00e9 elektroizola\u010dn\u00ed vlastnosti a jej\u00ed m\u011brn\u00fd odpor se pohybuje od 10111011 do 10151015 ohm\u016f. Tvrd\u00fd eloxovan\u00fd hlin\u00edk je proto vhodn\u00fd pro aplikace, kter\u00e9 vy\u017eaduj\u00ed nevodiv\u00e9 povrchy.<\/p>\n\n

Odolnost proti teplu<\/strong><\/h3>\n\n

Tvrd\u00e9 eloxovan\u00e9 povlaky sn\u00e1\u0161ej\u00ed d\u00edky sv\u00e9 inertn\u00ed povaze kr\u00e1tkodob\u00e9 vystaven\u00ed teplot\u00e1m a\u017e 2000 \u00b0C. Tato vlastnost je obzvl\u00e1\u0161t\u011b u\u017eite\u010dn\u00e1 v situac\u00edch, kdy je teplota vysok\u00e1.<\/p>\n\n

Tepeln\u00e9 vlastnosti<\/strong><\/h3>\n\n

Tvrd\u00e9 eloxovan\u00e9 povrchy maj\u00ed n\u00edzkou tepelnou vodivost, ale vysokou tepelnou emisivitu, tak\u017ee jsou vhodn\u00e9 pro odvod tepla v technick\u00fdch aplikac\u00edch, jako jsou chladi\u010de.<\/p>\n\n

Estetick\u00e9 mo\u017enosti<\/strong><\/h3>\n\n

Tvrd\u00fd eloxovan\u00fd hlin\u00edk m\u016f\u017ee m\u00edt r\u016fzn\u00e9 barvy v z\u00e1vislosti na kovu a tlou\u0161\u0165ce potahu. Obvykle se barvy pohybuj\u00ed od tmav\u011b \u0161ed\u00e9 po bronzov\u011b \u0161edou. Tyto povrchy lze tak\u00e9 obarvit na \u010derno, aby vypadaly l\u00e9pe a z\u00e1rove\u0148 si zachovaly sv\u00e9 ochrann\u00e9 vlastnosti.<\/p>\n\n

Drsnost povrchu<\/strong><\/h3>\n\n

Vzhledem k siln\u00e9 vrstv\u011b oxidu m\u016f\u017ee tento postup poskytovat drsn\u011bj\u0161\u00ed povrch ne\u017e jin\u00e9 metody eloxov\u00e1n\u00ed, co\u017e vy\u017eaduje dal\u0161\u00ed dokon\u010dovac\u00ed procesy u aplikac\u00ed, kter\u00e9 vy\u017eaduj\u00ed hladk\u00fd povrch.<\/p>\n\n

Jak\u00fd je rozd\u00edl mezi tvrd\u00fdm eloxov\u00e1n\u00edm a b\u011b\u017en\u00fdm eloxov\u00e1n\u00edm hlin\u00edku?<\/strong><\/h2>\n\n

Tvrd\u00e9 eloxov\u00e1n\u00ed a b\u011b\u017en\u00e9 eloxov\u00e1n\u00ed (zn\u00e1m\u00e9 tak\u00e9 jako standardn\u00ed eloxov\u00e1n\u00ed nebo eloxov\u00e1n\u00ed typu II) jsou dva samostatn\u00e9 postupy pou\u017e\u00edvan\u00e9 ke zlep\u0161en\u00ed povrchov\u00fdch vlastnost\u00ed hlin\u00edku. N\u00e1sleduje srovn\u00e1n\u00ed, kter\u00e9 poukazuje na v\u00fdznamn\u00e9 rozd\u00edly v postupu, vlastnostech a aplikac\u00edch.<\/p>\n\n

Proces a podm\u00ednky<\/strong><\/h3>\n\n
    \n
  • Tvrd\u00e9 eloxov\u00e1n\u00ed se prov\u00e1d\u00ed za regulovan\u011bj\u0161\u00edch podm\u00ednek, p\u0159i ni\u017e\u0161\u00edch teplot\u00e1ch a vy\u0161\u0161\u00ed hustot\u011b proudu. V\u00fdsledkem je siln\u011bj\u0161\u00ed a hust\u0161\u00ed vrstva oxidu, kter\u00e1 zvy\u0161uje odolnost.<\/li>\n\n\n\n
  • B\u011b\u017en\u00e9 eloxov\u00e1n\u00ed naproti tomu prob\u00edh\u00e1 p\u0159i pokojov\u00e9 teplot\u011b s ni\u017e\u0161\u00ed hustotou proudu, co\u017e vede k ten\u010d\u00edmu a m\u011bk\u010d\u00edmu eloxovan\u00e9mu povlaku.<\/li>\n<\/ul>\n\n

    Vlastnosti oxidov\u00e9 vrstvy<\/strong><\/h3>\n\n
      \n
    • Tvrd\u00e9 eloxov\u00e1n\u00ed vytv\u00e1\u0159\u00ed podstatn\u011b siln\u011bj\u0161\u00ed oxidov\u00fd povlak (a\u017e 150 mikrometr\u016f), kter\u00fd zaji\u0161\u0165uje v\u011bt\u0161\u00ed odolnost proti opot\u0159eben\u00ed a ochranu proti korozi. Tvrdost t\u00e9to vrstvy se m\u016f\u017ee pohybovat od 400 do 600 HV.<\/li>\n\n\n\n
    • P\u0159i b\u011b\u017en\u00e9m eloxov\u00e1n\u00ed se vytv\u00e1\u0159\u00ed ten\u010d\u00ed vrstva oxidu (5-25 mikrometr\u016f), kter\u00e1 je m\u011bk\u010d\u00ed a m\u00e1 p\u0159ev\u00e1\u017en\u011b dekorativn\u00ed charakter.<\/li>\n<\/ul>\n\n

      V\u00fdkonnostn\u00ed vlastnosti<\/strong><\/h3>\n\n
        \n
      • Tvrd\u00e9 eloxovan\u00e9 povrchy jsou extr\u00e9mn\u011b odoln\u00e9 proti opot\u0159eben\u00ed, tak\u017ee jsou ide\u00e1ln\u00ed pro aplikace s intenzivn\u00edm t\u0159en\u00edm nebo ot\u011brem. Snesou p\u0159\u00edsn\u00e9 normy pro testov\u00e1n\u00ed odolnosti proti od\u011bru, jako je ASTM D4060.<\/li>\n\n\n\n
      • B\u011b\u017en\u00e9 eloxovan\u00e9 povrchy maj\u00ed p\u0159im\u011b\u0159enou odolnost proti opot\u0159eben\u00ed, ale nejsou vhodn\u00e9 pro vysoce nam\u00e1han\u00e9 aplikace.<\/li>\n<\/ul>\n\n

        Aplikace<\/strong><\/h3>\n\n
          \n
        • Tvrd\u00e9 eloxov\u00e1n\u00ed se \u0161iroce pou\u017e\u00edv\u00e1 v oblastech vy\u017eaduj\u00edc\u00edch vysokou odolnost, jako jsou sou\u010d\u00e1sti letadel, vojensk\u00e9 vybaven\u00ed, l\u00e9ka\u0159sk\u00e9 p\u0159\u00edstroje a automobilov\u00e9 d\u00edly.<\/li>\n\n\n\n
        • B\u011b\u017en\u00e9 eloxov\u00e1n\u00ed se obvykle pou\u017e\u00edv\u00e1 sp\u00ed\u0161e pro dekorativn\u00ed povlaky na spot\u0159ebn\u00edm zbo\u017e\u00ed a sou\u010d\u00e1stech, kter\u00e9 nevy\u017eaduj\u00ed vysokou odolnost.<\/li>\n<\/ul>\n\n

          Jak\u00e9 jsou v\u00fdhody a omezen\u00ed eloxov\u00e1n\u00ed tvrd\u00fdm lakem?<\/strong><\/h2>\n\n

          Tvrd\u00e9 eloxov\u00e1n\u00ed m\u00e1 r\u016fzn\u00e9 v\u00fdhody pro zlep\u0161en\u00ed v\u00fdkonu a \u017eivotnosti hlin\u00edkov\u00fdch sou\u010d\u00e1st\u00ed. N\u00ed\u017ee jsou uvedeny hlavn\u00ed v\u00fdhody t\u00e9to metody a tak\u00e9 n\u011bkter\u00e1 omezen\u00ed, kter\u00e1 je t\u0159eba vz\u00edt v \u00favahu.<\/p>\n\n

          V\u00fdhody tvrd\u00e9ho eloxov\u00e1n\u00ed<\/strong><\/h3>\n\n

          Zv\u00fd\u0161en\u00e1 tvrdost<\/strong><\/p>\n\n

          Tvrd\u00e9 eloxov\u00e1n\u00ed v\u00fdrazn\u011b zvy\u0161uje povrchovou tvrdost hlin\u00edku, co\u017e vede k hodnot\u00e1m tvrdosti Rockwell C v rozmez\u00ed 50 a\u017e 70<\/strong>. Tato zv\u00fd\u0161en\u00e1 tvrdost zaji\u0161\u0165uje zv\u00fd\u0161enou odolnost proti opot\u0159eben\u00ed, od\u011bru a po\u0161kr\u00e1b\u00e1n\u00ed, tak\u017ee je ide\u00e1ln\u00ed pro vysoce nam\u00e1han\u00e9 aplikace.ns.<\/p>\n\n

          Zv\u00fd\u0161en\u00e1 odolnost proti korozi<\/strong><\/p>\n\n

          Siln\u00fd eloxovan\u00fd oxidov\u00fd povlak slou\u017e\u00ed jako ochrann\u00e1 bari\u00e9ra proti vn\u011bj\u0161\u00edm podm\u00ednk\u00e1m, co\u017e vede k v\u00fdjime\u010dn\u00e9 odolnosti proti korozi. Tvrd\u00fd eloxovan\u00fd hlin\u00edk odol\u00e1v\u00e1 testov\u00e1n\u00ed solnou mlhou po dobu v\u00edce ne\u017e 2000 hodin (ASTM B117)<\/strong>, co\u017e z n\u011bj \u010din\u00ed ide\u00e1ln\u00ed materi\u00e1l pro n\u00e1ro\u010dn\u00e9 podm\u00ednky.<\/p>\n\n

          Zv\u00fd\u0161en\u00e1 odolnost<\/strong><\/p>\n\n

          Siln\u00fd oxidov\u00fd povlak v\u00fdrazn\u011b zvy\u0161uje odolnost eloxovan\u00fdch sou\u010d\u00e1st\u00ed s tvrd\u00fdm povlakem. Tato odolnost prodlu\u017euje \u017eivotnost d\u00edl\u016f a umo\u017e\u0148uje jim vydr\u017eet opakovan\u00e9 pou\u017eit\u00ed bez ztr\u00e1ty struktur\u00e1ln\u00ed integrity.<\/p>\n\n

          V\u00fdjime\u010dn\u00e1 odolnost proti opot\u0159eben\u00ed<\/strong><\/p>\n\n

          Hust\u00fd anodick\u00fd povlak vytvo\u0159en\u00fd p\u0159i eloxov\u00e1n\u00ed tvrdou vrstvou m\u00e1 vynikaj\u00edc\u00ed odolnost proti opot\u0159eben\u00ed, tak\u017ee je ide\u00e1ln\u00ed pro sou\u010d\u00e1sti vystaven\u00e9 mechanick\u00e9mu nam\u00e1h\u00e1n\u00ed a t\u0159en\u00ed.<\/p>\n\n

          Dielektrick\u00e9 vlastnosti<\/strong><\/p>\n\n

          Oxidov\u00e1 vrstva je nevodiv\u00e1 a m\u00e1 vysokou dielektrickou pevnost s pr\u016frazn\u00fdm nap\u011bt\u00edm v rozmez\u00ed 600 a\u017e 1000 volt\u016f na milimetr<\/strong>. D\u00edky tomu je eloxov\u00e1n\u00ed tvrdou vrstvou ide\u00e1ln\u00ed pro elektroizola\u010dn\u00ed aplikace.<\/p>\n\n

          Zv\u00fd\u0161en\u00fd odvod tepla<\/strong><\/p>\n\n

          D\u00edky sv\u00e9 vysok\u00e9 emisivit\u011b a absorp\u010dn\u00ed schopnosti m\u016f\u017ee eloxovan\u00fd hlin\u00edk s tvrdou vrstvou zlep\u0161it odvod tepla a\u017e o 30 %<\/strong> ve srovn\u00e1n\u00ed se surov\u00fdm hlin\u00edkem.<\/p>\n\n

          Omezen\u00ed tvrd\u00e9ho eloxov\u00e1n\u00ed<\/strong><\/h3>\n\n

          Omezen\u00e9 mo\u017enosti barev<\/strong><\/p>\n\n

          Na rozd\u00edl od b\u011b\u017en\u00fdch eloxovac\u00edch postup\u016f, kter\u00e9 poskytuj\u00ed \u0161irokou \u0161k\u00e1lu z\u00e1\u0159iv\u00fdch barev, se p\u0159i eloxov\u00e1n\u00ed tvrdou vrstvou \u010dasto vytv\u00e1\u0159ej\u00ed tmav\u0161\u00ed povrchy (tmav\u011b \u0161ed\u00e9 nebo \u010dern\u00e9), kter\u00e9 nemus\u00ed spl\u0148ovat v\u0161echna estetick\u00e1 krit\u00e9ria.<\/p>\n\n

          Omezen\u00ed tlou\u0161\u0165ky<\/strong><\/p>\n\n

          V\u011bt\u0161\u00ed vrstva oxidu by mohla m\u00edt vliv na rozm\u011brov\u00e9 tolerance, co\u017e by ji \u010dinilo nevhodnou pro aplikace vy\u017eaduj\u00edc\u00ed p\u0159esn\u00e9 specifikace.<\/p>\n\n

          Drsnost povrchu<\/strong><\/p>\n\n

          Tvrd\u00e9 eloxov\u00e1n\u00ed m\u016f\u017ee m\u00edt drsn\u011bj\u0161\u00ed povrch ne\u017e jin\u00e9 eloxovac\u00ed postupy, co\u017e vy\u017eaduje dal\u0161\u00ed dokon\u010dovac\u00ed procesy pro aplikace, kter\u00e9 vy\u017eaduj\u00ed hladk\u00fd povrch.<\/p>\n\n

          K\u0159ehkost<\/strong><\/p>\n\n

          Tvrd\u00fd povlak m\u016f\u017ee b\u00fdt relativn\u011b k\u0159ehk\u00fd, tak\u017ee nen\u00ed vhodn\u00fd pro sou\u010d\u00e1sti vystaven\u00e9 siln\u00fdm n\u00e1raz\u016fm nebo nam\u00e1h\u00e1n\u00ed v ohybu.<\/p>\n\n

          Jak\u00fd je standardn\u00ed po\u017eadavek na eloxov\u00e1n\u00ed tvrdou vrstvou?<\/strong><\/h2>\n
          \n
          \"eloxování<\/figure><\/div>\n

          Tvrd\u00e9 eloxov\u00e1n\u00ed se \u0159\u00edd\u00ed n\u011bkolika pr\u016fmyslov\u00fdmi normami a krit\u00e9rii, kter\u00e9 zaji\u0161\u0165uj\u00ed kvalitu a v\u00fdkon povlak\u016f. N\u00ed\u017ee jsou uvedeny hlavn\u00ed normy a techniky zkou\u0161en\u00ed kvality pro eloxov\u00e1n\u00ed tvrd\u00fdmi povlaky.<\/p>\n\n

            \n
          • MIL-A-8625: <\/strong>Jedn\u00e1 se o z\u00e1kladn\u00ed vojenskou specifikaci pro eloxov\u00e1n\u00ed hlin\u00edku, kter\u00e1 popisuje specifikace pro eloxov\u00e1n\u00ed tvrdou vrstvou (typ III). Popisuje \u0159\u00edzen\u00ed procesu, tlou\u0161\u0165ky povlaku a opat\u0159en\u00ed pro zaji\u0161t\u011bn\u00ed kvality.<\/li>\n\n\n\n
          • AMS 2469: <\/strong>Leteck\u00e1 materi\u00e1lov\u00e1 specifikace (AMS) specifikuje specifikace pro tvrd\u00e9 anodick\u00e9 povlaky na hlin\u00edkov\u00fdch slitin\u00e1ch se zam\u011b\u0159en\u00edm na v\u00fdkon a trvanlivost.<\/li>\n\n\n\n
          • ASTM B580:<\/strong> Tato norma specifikuje po\u017eadavky na tvrd\u00e9 eloxov\u00e1n\u00ed hlin\u00edku pro architektonick\u00e9 \u00fa\u010dely, v\u010detn\u011b odolnosti proti korozi a integrity povlaku.<\/li>\n\n\n\n
          • ISO 10074: <\/strong>Jedn\u00e1 se o mezin\u00e1rodn\u00ed normu, kter\u00e1 stanovuje po\u017eadavky na tvrd\u00e9 eloxov\u00e1n\u00ed se zam\u011b\u0159en\u00edm na kontrolu kvality a zku\u0161ebn\u00ed techniky.<\/li>\n\n\n\n
          • MIL-A-63576:<\/strong> Tato specifikace obsahuje ustanoven\u00ed pro PTFE t\u011bsn\u011bn\u00ed tvrd\u00fdch eloxovan\u00fdch povrch\u016f, kter\u00e9 zvy\u0161uje odolnost proti opot\u0159eben\u00ed a mazivost.<\/li>\n\n\n\n
          • AMS 2482: <\/strong>Tato specifikace, stejn\u011b jako MIL-A-63576, se zab\u00fdv\u00e1 t\u011bsn\u011bn\u00edm PTFE v eloxovan\u00fdch aplikac\u00edch s tvrd\u00fdm povlakem pro zlep\u0161en\u00ed v\u00fdkonnostn\u00edch charakteristik.<\/li>\n<\/ul>\n\n

            Kolik typ\u016f kontrol kvality pro tvrd\u00e9 eloxov\u00e1n\u00ed?<\/strong><\/h2>\n\n

            Testov\u00e1n\u00ed kvality je nezbytn\u00e9 pro zaji\u0161t\u011bn\u00ed toho, aby eloxovan\u00e9 povrchy s tvrd\u00fdm povlakem spl\u0148ovaly po\u017eadovan\u00e9 parametry.<\/p>\n\n

              \n
            • Taberova zkou\u0161ka ot\u011bru (ASTM <\/strong>D4060): P\u0159i t\u00e9to zkou\u0161ce se m\u011b\u0159\u00ed odolnost proti opot\u0159eben\u00ed tak, \u017ee se eloxovan\u00fd povrch podrob\u00ed rota\u010dn\u00edmu od\u011bru p\u016fsoben\u00edm stanoven\u00e9 s\u00edly. M\u011b\u0159\u00ed se \u00fabytek hmotnosti pro stanoven\u00ed trvanlivosti.<\/li>\n\n\n\n
            • Zkou\u0161ka barvic\u00ed skvrnou (ASTM <\/strong>B136): P\u0159i t\u00e9to zkou\u0161ce se hodnot\u00ed kvalita procesu ut\u011bsn\u011bn\u00ed t\u00edm, \u017ee se zji\u0161\u0165uje, zda si obarven\u00fd vzorek p\u0159i pono\u0159en\u00ed do hork\u00e9ho roztoku zachov\u00e1 barvu, co\u017e nazna\u010duje, \u017ee oxidov\u00e1 vrstva byla dob\u0159e ut\u011bsn\u011bna.<\/li>\n\n\n\n
            • Zkou\u0161ka p\u0159\u00edpustnosti (MIL-<\/strong>A-8625): Nedestruktivn\u00ed zkou\u0161ka, kter\u00e1 ur\u010duje elektrickou admitanci eloxovan\u00e9 vrstvy, kter\u00e1 je \u00fam\u011brn\u00e1 tlou\u0161\u0165ce a kvalit\u011b t\u011bsn\u011bn\u00ed.<\/li>\n\n\n\n
            • Zkou\u0161ka soln\u00fdm post\u0159ikem (ASTM <\/strong>B117): P\u0159i t\u00e9to zkou\u0161ce se hodnot\u00ed odolnost proti korozi vystaven\u00edm vzork\u016f slan\u00e9mu prost\u0159ed\u00ed po dlouhou dobu; eloxovan\u00fd hlin\u00edk s tvrd\u00fdm povlakem p\u0159i t\u00e9to zkou\u0161ce obvykle vydr\u017e\u00ed v\u00edce ne\u017e 2 000 hodin.<\/li>\n\n\n\n
            • Bublina HCl:<\/strong> Tato metoda zahrnuje pono\u0159en\u00ed eloxovan\u00e9ho povlaku do slab\u00e9ho roztoku kyseliny chlorovod\u00edkov\u00e9, aby se vyhledaly vizu\u00e1ln\u00ed indik\u00e1tory po\u0161kozen\u00ed povlaku zp\u016fsoben\u00e9 tvorbou vod\u00edkov\u00fdch bublin.<\/li>\n\n\n\n
            • Test extr\u00e9mn\u00ed alkalick\u00e9 odolnosti:<\/strong> Tento test hodnot\u00ed v\u00fdkonnost eloxovan\u00e9 vrstvy p\u0159i vysok\u00fdch hodnot\u00e1ch pH, aby byla zaji\u0161t\u011bna dlouh\u00e1 \u017eivotnost v nep\u0159\u00edzniv\u00e9m chemick\u00e9m prost\u0159ed\u00ed.<\/li>\n<\/ul>\n\n

              Jak\u00e9 jsou aplikace tvrd\u00e9ho eloxov\u00e1n\u00ed?<\/strong><\/h2>\n\n

              Leteck\u00fd a kosmick\u00fd pr\u016fmysl<\/strong><\/h3>\n\n

              Tvrd\u00e9 eloxov\u00e1n\u00ed p\u0159in\u00e1\u0161\u00ed v\u00fdhody konstruk\u010dn\u00edm d\u00edl\u016fm, p\u0159evodovk\u00e1m a hydraulick\u00fdm syst\u00e9m\u016fm<\/strong>, proto\u017ee jim umo\u017e\u0148uje sn\u00e1\u0161et extr\u00e9mn\u00ed provozn\u00ed podm\u00ednky, zvy\u0161uje jejich \u017eivotnost a odolnost proti korozi.<\/p>\n\n

              Vojenstv\u00ed a obrana<\/strong><\/h3>\n\n

              Tvrd\u00fd elox je nezbytn\u00fd pro zbran\u011b, vozidla<\/strong> a dal\u0161\u00ed obrann\u00e9 vybaven\u00ed, proto\u017ee poskytuje pot\u0159ebnou ochranu proti nep\u0159\u00e1telsk\u00e9mu prost\u0159ed\u00ed a n\u00e1ro\u010dn\u00e9mu pou\u017e\u00edv\u00e1n\u00ed.<\/p>\n\n

              Medic\u00ednsk\u00e9 p\u0159\u00edstroje<\/strong><\/h3>\n\n

              Chirurgick\u00e9 n\u00e1stroje a zdravotnick\u00e9 prost\u0159edky vy\u017eaduj\u00ed povrchy, kter\u00e9 jsou trvanliv\u00e9, nekontaminuj\u00ed a odol\u00e1vaj\u00ed opakovan\u00fdm steriliza\u010dn\u00edm operac\u00edm. Tyto po\u017eadavky \u00fa\u010dinn\u011b spl\u0148uje eloxov\u00e1n\u00ed tvrd\u00fdm povlakem.<\/p>\n\n

              Automobilov\u00e9 komponenty<\/strong><\/h3>\n\n

              Tvrd\u00e9 eloxov\u00e1n\u00ed se pou\u017e\u00edv\u00e1 k ochran\u011b d\u00edl\u016f motoru, brzdov\u00fdch syst\u00e9m\u016f a sou\u010d\u00e1st\u00ed zav\u011b\u0161en\u00ed proti opot\u0159eben\u00ed a korozi, \u010d\u00edm\u017e se zvy\u0161uje spolehlivost a \u017eivotnost vozidla.<\/p>\n\n

              Robotika<\/strong><\/h3>\n\n

              V robotice chr\u00e1n\u00ed eloxovan\u00e9 povrchy s tvrd\u00fdm povlakem choulostiv\u00e9 sou\u010d\u00e1sti p\u0159ed opot\u0159eben\u00edm a zaji\u0161\u0165uj\u00ed dlouhodob\u00fd v\u00fdkon.<\/p>\n\n

              Jak\u00e9 faktory ovliv\u0148uj\u00ed eloxov\u00e1n\u00ed tvrdou vrstvou?<\/strong><\/h2>\n
              \n
              \"Tvrdé<\/figure><\/div>\n

              Slo\u017een\u00ed slitiny<\/strong><\/h3>\n\n

              Vlastnosti eloxovan\u00e9 vrstvy z\u00e1vis\u00ed na slitin\u011b hlin\u00edku. R\u016fzn\u00e9 slitiny reaguj\u00ed na eloxov\u00e1n\u00ed r\u016fzn\u011b, m\u011bn\u00ed se velikost a hloubka p\u00f3r\u016f, co\u017e ovliv\u0148uje tvrdost a odolnost oxidov\u00e9 vrstvy. \u010cist\u0161\u00ed hlin\u00edkov\u00e9 slitiny eloxuj\u00ed rovnom\u011brn\u011bji a tvrd\u011bji ne\u017e slitiny s v\u011bt\u0161\u00edm mno\u017estv\u00edm leguj\u00edc\u00edch slo\u017eek.<\/p>\n\n

              Kvalita povrchu<\/strong><\/h3>\n\n

              Kvalitn\u00ed eloxov\u00e1n\u00ed z\u00e1vis\u00ed na p\u016fvodn\u00edm stavu povrchu hlin\u00edkov\u00e9ho d\u00edlu. Nerovnom\u011brn\u00e1 eloxace v d\u016fsledku \u0161kr\u00e1banc\u016f, prom\u00e1\u010dklin nebo ne\u010distot m\u016f\u017ee sn\u00ed\u017eit tlou\u0161\u0165ku oxidov\u00e9 vrstvy nebo p\u0159ilnavost. Pro optim\u00e1ln\u00ed p\u0159ilnavost a v\u00fdkonnost eloxovan\u00e9ho povlaku mus\u00ed b\u00fdt povrch d\u016fkladn\u011b o\u010di\u0161t\u011bn a p\u0159ipraven.<\/p>\n\n

              Anodiza\u010dn\u00ed parametry<\/strong><\/h3>\n\n

              Nap\u011bt\u00ed, hustota proudu, teplota a koncentrace kyseliny ur\u010duj\u00ed kvalitu eloxov\u00e1n\u00ed tvrdou vrstvou. R\u016fzn\u00e9 hustoty proudu ovliv\u0148uj\u00ed slo\u017eitost a hustotu povlaku, zat\u00edmco vy\u0161\u0161\u00ed nap\u011bt\u00ed a ni\u017e\u0161\u00ed teploty p\u0159in\u00e1\u0161ej\u00ed siln\u011bj\u0161\u00ed a tu\u017e\u0161\u00ed oxidov\u00e9 vrstvy. Optim\u00e1ln\u00ed vlastnosti povlaku vy\u017eaduj\u00ed pe\u010dliv\u00e9 \u0159\u00edzen\u00ed a sledov\u00e1n\u00ed t\u011bchto faktor\u016f.<\/p>\n\n

              Z\u00e1v\u011br<\/strong><\/h2>\n\n

              A kone\u010dn\u011b, eloxov\u00e1n\u00ed tvrdou vrstvou zvy\u0161uje tvrdost a odolnost proti korozi, tak\u017ee je vhodn\u00e9 pro n\u00e1ro\u010dn\u00e9 aplikace. Nab\u00edz\u00ed omezen\u00e9 mo\u017enosti barev a drsnosti povrchu, ale pe\u010dliv\u00e9 slo\u017een\u00ed slitiny a v\u00fdrobn\u00ed podm\u00ednky zaji\u0161\u0165uj\u00ed vysoce kvalitn\u00ed povrchovou \u00fapravu, kter\u00e1 odpov\u00edd\u00e1 pr\u016fmyslov\u00fdm po\u017eadavk\u016fm.<\/p>\n","protected":false},"excerpt":{"rendered":"

              Tvrd\u00e9 eloxov\u00e1n\u00ed vytv\u00e1\u0159\u00ed na hlin\u00edku a jeho slitin\u00e1ch siln\u00fd, odoln\u00fd oxidov\u00fd povlak. Zvy\u0161uje tvrdost, odolnost proti opot\u0159eben\u00ed a ochranu proti korozi, a proto m\u00e1 z\u00e1sadn\u00ed v\u00fdznam v leteck\u00e9m, vojensk\u00e9m a automobilov\u00e9m pr\u016fmyslu, kde se cen\u00ed v\u00fdkon a trvanlivost.<\/p>\n","protected":false},"author":1,"featured_media":8625,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[20],"tags":[],"class_list":["post-14716","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized-cs"],"yoast_head":"\nTvrd\u00e9 eloxov\u00e1n\u00ed: Rychl\u00fd pr\u016fvodce, jak se to nau\u010dit - ChansMachining<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/chansmachining.com\/cs\/tvrde-eloxovani-rychly-pruvodce-jak-se-to-naucit\/\" \/>\n<meta property=\"og:locale\" content=\"cs_CZ\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Tvrd\u00e9 eloxov\u00e1n\u00ed: Rychl\u00fd pr\u016fvodce, jak se to nau\u010dit - ChansMachining\" \/>\n<meta property=\"og:description\" content=\"Tvrd\u00e9 eloxov\u00e1n\u00ed vytv\u00e1\u0159\u00ed na hlin\u00edku a jeho slitin\u00e1ch siln\u00fd, odoln\u00fd oxidov\u00fd povlak. 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