{"id":26918,"date":"2025-12-09T10:41:06","date_gmt":"2025-12-09T02:41:06","guid":{"rendered":"https:\/\/sinoextrud.com\/?p=26918"},"modified":"2025-12-09T10:41:06","modified_gmt":"2025-12-09T02:41:06","slug":"metody-zkouseni-tvrdosti-hlinikovych-vylisku","status":"publish","type":"post","link":"https:\/\/sinoextrud.com\/cs\/aluminum-extrusion-hardness-testing-methods\/","title":{"rendered":"Metody zkou\u0161en\u00ed tvrdosti hlin\u00edkov\u00fdch v\u00fdlisk\u016f?"},"content":{"rendered":"

\"Sructrual
Sructrual Hlin\u00edkov\u00e9 vytla\u010dovac\u00ed profily Stropn\u00ed podhled Drop Ceiling<\/figcaption><\/figure>\n<\/p>\n

Hlin\u00edkov\u00e9 v\u00fdlisky n\u011bkdy projdou vizu\u00e1ln\u00ed kontrolou, ale hluboko uvnit\u0159 skr\u00fdvaj\u00ed slab\u00e1 m\u00edsta. Konzistentn\u00ed tvrdost je \u010dasto p\u0159ehl\u00ed\u017eena.<\/p>\n

Zkou\u0161ky tvrdosti zaji\u0161\u0165uj\u00ed, \u017ee extrudovan\u00fd hlin\u00edk spl\u0148uje po\u017eadavky na pevnost a zabra\u0148uje selh\u00e1n\u00ed p\u0159i zat\u00ed\u017een\u00ed nebo opot\u0159eben\u00ed.<\/strong><\/p>\n

Znalost r\u016fzn\u00fdch metod testov\u00e1n\u00ed pom\u00e1h\u00e1 vybrat spolehliv\u00e9 dodavatele a vyhnout se p\u0159ekvapen\u00edm. <\/p>\n

Kter\u00e9 metody se pou\u017e\u00edvaj\u00ed ke zkou\u0161en\u00ed tvrdosti hlin\u00edku?<\/h2>\n

Tov\u00e1rny na vytla\u010dov\u00e1n\u00ed pou\u017e\u00edvaj\u00ed n\u011bkolik zkou\u0161ek tvrdosti. Ka\u017ed\u00e1 metoda zji\u0161\u0165uje jin\u00e9 aspekty pevnosti a vhodnosti kovu. <\/p>\n

Mezi b\u011b\u017en\u00e9 metody pat\u0159\u00ed Brinellova, Rockwellova (stupnice B nebo povrchov\u00e1 stupnice), Vickersova a p\u0159\u00edle\u017eitostn\u011b Shoreova nebo odrazov\u00e1 zkou\u0161ka povrchov\u00e9 tvrdosti.<\/strong> <\/p>\n

\"6063
6063 CNC obr\u00e1b\u011bn\u00ed hlin\u00edku vytla\u010dovac\u00ed z\u00e1v\u011bs<\/figcaption><\/figure>\n<\/p>\n

Tov\u00e1rny si vyb\u00edraj\u00ed metodu podle typu slitiny, geometrie profilu a po\u017eadovan\u00e9 p\u0159esnosti. N\u011bkter\u00e9 metody jsou vhodn\u00e9 pro velk\u00e9 objemn\u00e9 p\u0159edvalky, jin\u00e9 pro tenk\u00e9 profily nebo povlaky.<\/p>\n

P\u0159ehled b\u011b\u017en\u00fdch zkou\u0161ek tvrdosti<\/h3>\n

Zde je tabulka shrnuj\u00edc\u00ed hlavn\u00ed metody zkou\u0161en\u00ed tvrdosti pou\u017e\u00edvan\u00e9 pro vytla\u010dov\u00e1n\u00ed hlin\u00edku:<\/p>\n\n\n\n\n\n\n\n\n
Zku\u0161ebn\u00ed metoda<\/th>\nCo m\u011b\u0159\u00ed<\/th>\nTypick\u00e9 p\u0159\u00edpady pou\u017eit\u00ed<\/th>\n<\/tr>\n<\/thead>\n
Brinell (HB)<\/td>\nInduk\u010dn\u00ed tvrdost p\u0159i pou\u017eit\u00ed velk\u00e9 kuli\u010dky pod zat\u00ed\u017een\u00edm<\/td>\nVelk\u00e9 lisovan\u00e9 profily, p\u0159edvalky<\/td>\n<\/tr>\n
Rockwell B nebo povrchov\u00e1 (HRB, HRS)<\/td>\nHloubka vrypu p\u0159i men\u0161\u00edm zat\u00ed\u017een\u00ed<\/td>\nHotov\u00e9 profily, tenk\u00e9 profily<\/td>\n<\/tr>\n
Vickers (HV)<\/td>\nTvrdost mikroindentace, vysok\u00e1 p\u0159esnost<\/td>\nTenk\u00e9 st\u011bny, mal\u00e9 pr\u016f\u0159ezy, vrstvy povlaku<\/td>\n<\/tr>\n
Pob\u0159e\u017e\u00ed \/ Odraz<\/td>\nTvrdost povrchu pomoc\u00ed zkou\u0161ky odrazem nebo dynamick\u00e9 zkou\u0161ky<\/td>\nPru\u017einy, pry\u017eov\u00e9 vlo\u017eky nebo speci\u00e1ln\u00ed povrchov\u00e9 \u00fapravy<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Brinell pou\u017e\u00edv\u00e1 tvrdou ocelovou nebo karbidovou kuli\u010dku, kterou po stanovenou dobu siln\u011b zat\u011b\u017euje, a pot\u00e9 m\u011b\u0159\u00ed pr\u016fm\u011br vtisku. Rockwellovy zkou\u0161ky pou\u017e\u00edvaj\u00ed ku\u017eel nebo malou kuli\u010dku s men\u0161\u00edm zat\u00ed\u017een\u00edm a m\u011b\u0159\u00ed hloubku. Vickers pou\u017e\u00edv\u00e1 diamantovou pyramidu pod \u0159\u00edzen\u00fdm zat\u00ed\u017een\u00edm, vhodnou pro tenk\u00e9 nebo jemn\u00e9 \u0159ezy. Shoreovy nebo odrazov\u00e9 zkou\u0161ky se pou\u017e\u00edvaj\u00ed v\u011bt\u0161inou pro nekovov\u00e9 d\u00edly nebo povrchov\u00e9 povlaky, nikoli pro hlin\u00edkov\u00e9 j\u00e1dro.<\/p>\n

Tov\u00e1rny \u010dasto vol\u00ed zku\u0161ebn\u00ed metodu na z\u00e1klad\u011b geometrie profilu, tlou\u0161\u0165ky a po\u017eadovan\u00e9 pevnosti. U siln\u00fdch a t\u011b\u017ek\u00fdch profil\u016f lze pou\u017e\u00edt Brinellovu metodu. Pro b\u011b\u017en\u00e9 v\u00fdlisky - Rockwell nebo Vickers m\u016f\u017ee poskytnout rychlej\u0161\u00ed a p\u0159esn\u011bj\u0161\u00ed \u00fadaje. Pro tenk\u00e9 st\u011bny nebo mal\u00e9 prvky - up\u0159ednost\u0148uje se Vickersova metoda. Pro d\u00edly s pry\u017eov\u00fdmi nebo plastov\u00fdmi vlo\u017ekami - Shoreovy nebo odskokov\u00e9 zkou\u0161ky kontroluj\u00ed tyto materi\u00e1ly.<\/p>\n

Jak se Brinellova zkou\u0161ka srovn\u00e1v\u00e1 s Rockwellovou zkou\u0161kou?<\/h2>\n

Brinellova a Rockwellova zkou\u0161ka tvrdosti jsou dv\u011b nejb\u011b\u017en\u011bj\u0161\u00ed zkou\u0161ky tvrdosti v lisovac\u00ed praxi. Ka\u017ed\u00e1 z nich m\u00e1 sv\u00e9 siln\u00e9 str\u00e1nky a omezen\u00ed.<\/p>\n

Brinellova metoda poskytuje spolehliv\u00e9 v\u00fdsledky pro objemov\u00fd hlin\u00edk, ale je pomal\u00e1 a nemus\u00ed vyhovovat tenk\u00fdm nebo slo\u017eit\u00fdm profil\u016fm. Rockwell je rychlej\u0161\u00ed a prakti\u010dt\u011bj\u0161\u00ed pro b\u011b\u017en\u00e9 kontroly hotov\u00fdch d\u00edl\u016f.<\/strong> <\/p>\n

\"Fr\u00e9zov\u00e1n\u00ed
Fr\u00e9zov\u00e1n\u00ed a mont\u00e1\u017e hlin\u00edkov\u00fdch v\u00fdlisk\u016f<\/figcaption><\/figure>\n<\/p>\n

Hlavn\u00ed rozd\u00edly mezi Brinellem a Rockwellem<\/h3>\n

Velikost zat\u00ed\u017een\u00ed a odsazen\u00ed<\/h4>\n

Brinell pou\u017e\u00edv\u00e1 velk\u00e1 zat\u00ed\u017een\u00ed a velkou vtiskovac\u00ed kuli\u010dku. T\u00edm se z\u00edsk\u00e1 pr\u016fm\u011brn\u00e1 tvrdost ve v\u011bt\u0161\u00edm objemu. Rockwell pou\u017e\u00edv\u00e1 leh\u010d\u00ed zat\u00ed\u017een\u00ed a men\u0161\u00ed vtisky. T\u00edm se m\u011b\u0159en\u00ed lokalizuje, ale m\u016f\u017ee chyb\u011bt \u0161ir\u0161\u00ed variabilita.<\/p>\n

Vhodnost pro tenk\u00e9 st\u011bny<\/h4>\n

Hlubok\u00fd Brinell\u016fv d\u016flek m\u016f\u017ee proch\u00e1zet tenk\u00fdmi st\u011bnami nebo deformovat tvar. M\u011blk\u00fd Rockwell\u016fv d\u016flek funguje l\u00e9pe na ten\u010d\u00edch st\u011bn\u00e1ch nebo \u00fazk\u00fdch \u00fasec\u00edch.<\/p>\n

Rychlost a pohodl\u00ed<\/h4>\n

Spole\u010dnost Rockwell je rychlej\u0161\u00ed. Poskytuje p\u0159\u00edm\u00fd ode\u010det. Brinell vy\u017eaduje zat\u00ed\u017een\u00ed a n\u00e1sledn\u00e9 ru\u010dn\u00ed m\u011b\u0159en\u00ed pr\u016fm\u011bru vtisku. To zpomaluje kontrolu velk\u00fdch d\u00e1vek.<\/p>\n

Citlivost na povrchovou \u00fapravu<\/h4>\n

Brinell m\u016f\u017ee b\u00fdt ovlivn\u011bn drsn\u00fdm povrchem nebo povlakem. Rockwell nebo Vickers si l\u00e9pe porad\u00ed s hlad\u0161\u00edmi povrchy nebo povrchy s povlakem. <\/p>\n

Zde je jednoduch\u00e1 srovn\u00e1vac\u00ed tabulka:<\/p>\n\n\n\n\n\n\n\n\n\n
Funkce<\/th>\nBrinell<\/th>\nRockwell (B \/ Povrchov\u00e1)<\/th>\n<\/tr>\n<\/thead>\n
Velikost odsazen\u00ed \/ zat\u00ed\u017een\u00ed<\/td>\nVelk\u00e9 \/ t\u011b\u017ek\u00e9<\/td>\nMal\u00fd \/ lehk\u00fd<\/td>\n<\/tr>\n
Testovan\u00fd objem<\/td>\nHlub\u0161\u00ed, v\u011bt\u0161\u00ed objem<\/td>\nMen\u0161\u00ed, m\u00edstn\u00ed objem<\/td>\n<\/tr>\n
Po\u017eadavek na tlou\u0161\u0165ku<\/td>\nPot\u0159ebuje zna\u010dnou tlou\u0161\u0165ku<\/td>\nFunguje na tenkost\u011bnn\u00fdch profilech<\/td>\n<\/tr>\n
Rychlost<\/td>\nPomalej\u0161\u00ed (m\u00edra odsazen\u00ed)<\/td>\nRychlej\u0161\u00ed (p\u0159\u00edm\u00e9 \u010dten\u00ed)<\/td>\n<\/tr>\n
P\u0159\u00edpad pou\u017eit\u00ed<\/td>\nSypk\u00fd materi\u00e1l, sochory, siln\u00e9 profily<\/td>\nHotov\u00e9 d\u00edly, tenk\u00e9 profily, b\u011b\u017en\u00e1 kontrola kvality<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Kv\u016fli t\u011bmto rozd\u00edl\u016fm mnoho tov\u00e1ren zkou\u0161\u00ed p\u0159edvalky nebo velk\u00e9 profily podle Brinella. Po vytla\u010den\u00ed a tepeln\u00e9m zpracov\u00e1n\u00ed pak pou\u017e\u00edvaj\u00ed Rockwellovu nebo Vickersovu metodu pro kone\u010dnou kontrolu kvality. T\u00edm se zajist\u00ed, \u017ee po\u010d\u00e1te\u010dn\u00ed slitina a zpracov\u00e1n\u00ed jsou spr\u00e1vn\u00e9 a kone\u010dn\u00fd v\u00fdrobek z\u016fstane v r\u00e1mci specifikace tvrdosti.<\/p>\n

Pokud m\u00e1 d\u00edl slo\u017eitou geometrii nebo povlak, lze pou\u017e\u00edt Vickersovu metodu. U v\u00fdrobn\u00edch linek s velk\u00fdm objemem v\u00fdroby \u0161et\u0159\u00ed Rockwell \u010das. U speci\u00e1ln\u00edch d\u00edl\u016f, kde z\u00e1le\u017e\u00ed na tvrdosti nap\u0159\u00ed\u010d tlou\u0161\u0165kou, poskytuje Brinell zpr\u016fm\u011brovan\u011bj\u0161\u00ed hodnotu. <\/p>\n

Jak\u00e9 vybaven\u00ed je standardn\u00ed sou\u010d\u00e1st\u00ed vytla\u010dovac\u00edch laborato\u0159\u00ed?<\/h2>\n

Kvalitn\u00ed vytla\u010dovac\u00ed laborato\u0159e obvykle instaluj\u00ed sadu z\u00e1kladn\u00edch tvrdom\u011br\u016f a pomocn\u00fdch n\u00e1stroj\u016f. To umo\u017e\u0148uje testov\u00e1n\u00ed r\u016fzn\u00fdch typ\u016f profil\u016f a v\u00fdrobn\u00edch f\u00e1z\u00ed.<\/p>\n

Standardn\u00ed vybaven\u00ed laborato\u0159e zahrnuje Brinellovy a Rockwellovy tvrdom\u011bry, Vickersovy mikrotvrdom\u011bry, optick\u00e9 m\u011b\u0159ic\u00ed p\u0159\u00edstroje a z\u00e1kladn\u00ed vybaven\u00ed pro p\u0159\u00edpravu vzork\u016f.<\/strong> <\/p>\n

\"Pr\u016fmyslov\u00fd
Pr\u016fmyslov\u00fd hlin\u00edkov\u00fd vytla\u010dovac\u00ed profil<\/figcaption><\/figure>\n<\/p>\n

Typick\u00fd seznam vybaven\u00ed<\/h3>\n
    \n
  • Brinell\u016fv tvrdom\u011br<\/strong> - s kalibrovanou kuli\u010dkou, mo\u017enost\u00ed zat\u00ed\u017een\u00ed (nap\u0159. 500 kg, 750 kg) a optick\u00fdm mikroskopem pro m\u011b\u0159en\u00ed vtisku. <\/li>\n
  • Rockwell\u016fv tvrdom\u011br<\/strong> - \u010dasto stupnice Rockwell B (ocelov\u00e1 kuli\u010dka 1\/16\", zat\u00ed\u017een\u00ed 100 kg) a n\u011bkdy povrchov\u00e1 stupnice Rockwell pro tenk\u00e9 materi\u00e1ly. <\/li>\n
  • Vickers\u016fv mikrotvrdom\u011br<\/strong> - diamantov\u00fd pyramidov\u00fd indentor, zat\u00ed\u017een\u00ed od 1 gf do 1 kg v z\u00e1vislosti na vzorku. <\/li>\n
  • Tester tvrdosti pro povlaky nebo vlo\u017eky<\/strong> - voliteln\u00e1 zkou\u0161e\u010dka podle Shoreovy stupnice nebo zkou\u0161e\u010dka odskoku pro nekovov\u00e9 d\u00edly. <\/li>\n
  • Optick\u00fd mikroskop nebo metalurgick\u00fd mikroskop<\/strong> - pro m\u011b\u0159en\u00ed vrub\u016f nebo zkoum\u00e1n\u00ed povrchu\/struktury. <\/li>\n
  • \u0158eza\u010dky a le\u0161ti\u010dky vzork\u016f<\/strong> - k p\u0159\u00edprav\u011b p\u0159\u00ed\u010dn\u00fdch \u0159ez\u016f, zejm\u00e9na p\u0159i zkou\u0161en\u00ed vnit\u0159n\u00edch st\u011bn nebo v\u00edcevrstv\u00fdch \u0159ez\u016f. <\/li>\n
  • T\u0159meny, mikrometry, tlou\u0161\u0165kom\u011bry<\/strong> - pro m\u011b\u0159en\u00ed rozm\u011br\u016f profilu p\u0159ed nebo po zkou\u0161ce tvrdosti. <\/li>\n<\/ul>\n

    V mnoha laborato\u0159\u00edch technici vy\u0159ez\u00e1vaj\u00ed mal\u00e9 zku\u0161ebn\u00ed vzorky z lisovan\u00fdch profil\u016f nebo pou\u017e\u00edvaj\u00ed od\u0159ezky. U polotovar\u016f nebo velk\u00fdch profil\u016f mohou pou\u017e\u00edt kusy v pln\u00e9 velikosti. U tenkost\u011bnn\u00fdch nebo jemn\u00fdch profil\u016f vy\u0159e\u017eou mal\u00e9 vzorky a ulo\u017e\u00ed je do prysky\u0159ice pro le\u0161t\u011bn\u00ed a zkou\u0161en\u00ed mikrotvrdosti.<\/p>\n

    Laborato\u0159e tak\u00e9 vedou kalibra\u010dn\u00ed z\u00e1znamy a pou\u017e\u00edvaj\u00ed certifikovan\u00e9 referen\u010dn\u00ed bloky k ov\u011b\u0159en\u00ed p\u0159esnosti testeru. T\u00edm je zaji\u0161t\u011bna spolehlivost v\u00fdsledk\u016f v pr\u016fb\u011bhu \u010dasu a u r\u016fzn\u00fdch stroj\u016f.<\/p>\n

    P\u0159i velk\u00fdch v\u00fdrobn\u00edch s\u00e9ri\u00edch mohou b\u00fdt zkou\u0161ky tvrdosti sou\u010d\u00e1st\u00ed pl\u00e1nu odb\u011bru vzork\u016f. Nap\u0159\u00edklad testujte jeden kus z ka\u017ed\u00e9 d\u00e1vky tepeln\u00e9ho zpracov\u00e1n\u00ed nebo testujte v\u00edce m\u00edst nap\u0159\u00ed\u010d profilem: st\u011bnu, roh, st\u0159edn\u00ed tlou\u0161\u0165ku. Tato bodov\u00e1 kontrola pom\u00e1h\u00e1 potvrdit rovnom\u011brnost a vyhnout se slab\u00fdm m\u00edst\u016fm.<\/p>\n

    Je tvrdost ve slo\u017eit\u00fdch profilech rovnom\u011brn\u00e1?<\/h2>\n

    Komplexn\u00ed hlin\u00edkov\u00e9 profily se mohou li\u0161it tlou\u0161\u0165kou st\u011bny, tvarem a mohou obsahovat ohyby, \u017eebra a dut\u00e9 profily. Tvrdost nemus\u00ed b\u00fdt v t\u011bchto oblastech stejn\u00e1. <\/p>\n

    Tvrdost se m\u016f\u017ee li\u0161it mezi tlust\u00fdmi a tenk\u00fdmi \u0159ezy, rohy a st\u0159edy st\u011bn nebo oblastmi v bl\u00edzkosti povrchov\u00fdch \u00faprav. Rovnom\u011brnost z\u00e1vis\u00ed na procesu vytla\u010dov\u00e1n\u00ed, chlazen\u00ed, tepeln\u00e9m zpracov\u00e1n\u00ed a geometrii pr\u016f\u0159ezu.<\/strong> <\/p>\n

    \"P\u0159izp\u016fsoben\u00e9
    P\u0159izp\u016fsoben\u00e9 matn\u00e9 elektrofor\u00e9zy hlin\u00edkov\u00e9 profily pro stavebn\u00ed materi\u00e1l<\/figcaption><\/figure>\n<\/p>\n

    Pro\u010d se tvrdost ve slo\u017eit\u00fdch profilech li\u0161\u00ed<\/h3>\n

    Pokud m\u00e1 profil nestejnou tlou\u0161\u0165ku, r\u016fzn\u00e9 \u010d\u00e1sti se po vytla\u010dov\u00e1n\u00ed nebo tepeln\u00e9m zpracov\u00e1n\u00ed ochlazuj\u00ed r\u016fznou rychlost\u00ed. Rychlej\u0161\u00ed ochlazov\u00e1n\u00ed m\u016f\u017ee zp\u016fsobit rozd\u00edlnou mikrostrukturu, kter\u00e1 ovliv\u0148uje tvrdost. Rohy, \u017eebra a tenk\u00e9 st\u011bny se ochlazuj\u00ed rychleji a v z\u00e1vislosti na zpracov\u00e1n\u00ed mohou b\u00fdt tvrd\u0161\u00ed nebo m\u011bk\u010d\u00ed ne\u017e siln\u00e9 st\u011bny.<\/p>\n

    Povlakov\u00e1n\u00ed nebo eloxov\u00e1n\u00ed nem\u011bn\u00ed v\u00fdrazn\u011b tvrdost, ale tepeln\u00e9 zpracov\u00e1n\u00ed (nap\u0159. st\u00e1rnut\u00ed u 6061-T6) vy\u017eaduje jednotnou teplotu a dobu. Pokud se n\u011bkter\u00e9 d\u00edly p\u0159i kalen\u00ed ochlad\u00ed rychleji nebo vyklouznou z pece d\u0159\u00edve, tvrdost v cel\u00e9m profilu bude nerovnom\u011brn\u00e1.<\/p>\n

    Tak\u00e9 mechanick\u00e1 deformace b\u011bhem vytla\u010dov\u00e1n\u00ed (deformace v roz\u00edch, \u017eebra) m\u016f\u017ee v\u00e9st ke zpevn\u011bn\u00ed v ur\u010dit\u00fdch z\u00f3n\u00e1ch. To op\u011bt zp\u016fsobuje odchylky.<\/p>\n

    Kontrola rovnom\u011brnosti tvrdosti<\/h3>\n

    Pou\u017eit\u00ed v\u00edce testovac\u00edch bod\u016f<\/h4>\n

    Technici odeb\u00edraj\u00ed vzorky z n\u011bkolika m\u00edst: siln\u00e1 st\u011bna, tenk\u00e1 st\u011bna, roh, okraj. V\u00fdsledky zaznamen\u00e1vaj\u00ed odd\u011blen\u011b. <\/p>\n

    Pr\u016f\u0159ezov\u00e9 zkou\u0161ky<\/h4>\n

    Vy\u0159\u00edzn\u011bte profil, vyle\u0161t\u011bte \u0159ez, otestujte vnit\u0159n\u00ed a vn\u011bj\u0161\u00ed stranu mikrotvrdost\u00ed (Vickers). T\u00edm zjist\u00edte, zda tvrdost kles\u00e1 uvnit\u0159 nebo v bl\u00edzkosti povrchu. <\/p>\n

    Sledov\u00e1n\u00ed d\u00e1vek a profil\u016f<\/h4>\n

    Propojte ka\u017ed\u00fd v\u00fdsledek tvrdosti s \u010d\u00edslem \u0161ar\u017ee, strojem, v\u00fdkresem profilu. To pom\u016f\u017ee zjistit, zda ur\u010dit\u00e9 tvary vykazuj\u00ed v\u011bt\u0161\u00ed odchylky. <\/p>\n

    Statistick\u00e1 anal\u00fdza<\/h4>\n

    Sb\u00edrejte \u00fadaje o tvrdosti z mnoha profil\u016f. Ke sledov\u00e1n\u00ed odchylek pou\u017eijte kontroln\u00ed grafy. Pokud odchylka p\u0159ekro\u010d\u00ed limit, tov\u00e1rna prozkoum\u00e1 proces - mo\u017en\u00e1 uprav\u00ed chlazen\u00ed, st\u00e1rnut\u00ed nebo parametry vytla\u010dov\u00e1n\u00ed. <\/p>\n

    Pou\u017eit\u00ed rafinovan\u00e9ho tepeln\u00e9ho zpracov\u00e1n\u00ed nebo homogenizace<\/h4>\n

    U slo\u017eit\u00fdch profil\u016f pom\u00e1h\u00e1 homogenizace nebo \u0159\u00edzen\u00e9 chlazen\u00ed sn\u00ed\u017eit vnit\u0159n\u00ed pnut\u00ed a kol\u00eds\u00e1n\u00ed tvrdosti. Dobr\u00e9 tov\u00e1rny pe\u010dliv\u011b pl\u00e1nuj\u00ed tepeln\u00e9 cykly. <\/p>\n

    Zde je jednoduch\u00e1 tabulka faktor\u016f a jejich vlivu na rovnom\u011brnost tvrdosti:<\/p>\n\n\n\n\n\n\n\n\n
    Faktor<\/th>\nEfekt<\/th>\nMetoda \u0159\u00edzen\u00ed<\/th>\n<\/tr>\n<\/thead>\n
    Rozd\u00edl v tlou\u0161\u0165ce st\u011bny<\/td>\nNerovnom\u011brn\u00e9 chlazen\u00ed \u2192 kol\u00eds\u00e1n\u00ed tvrdosti<\/td>\nPou\u017eijte rovnom\u011brn\u00e9 chlazen\u00ed, upravte dobu zr\u00e1n\u00ed<\/td>\n<\/tr>\n
    Geometrie roh\u016f \/ \u017eeber<\/td>\nDeformace nebo rychlej\u0161\u00ed ochlazov\u00e1n\u00ed \u2192 lok\u00e1ln\u00ed tvrd\u00e9\/m\u011bkk\u00e9 z\u00f3ny<\/td>\nV\u00edce zku\u0161ebn\u00edch bod\u016f, pr\u016f\u0159ezov\u00e9 zkou\u0161ky<\/td>\n<\/tr>\n
    Ned\u016fslednost tepeln\u00e9ho zpracov\u00e1n\u00ed<\/td>\nNadm\u011brn\u00e9\/nedostate\u010dn\u00e9 st\u00e1rnut\u00ed \u2192 odchylka tvrdosti<\/td>\nP\u0159\u00edsn\u00e1 kontrola pece, z\u00e1znam parametr\u016f<\/td>\n<\/tr>\n
    Zp\u016fsob chlazen\u00ed (vzduch vs. kalen\u00ed)<\/td>\nRozd\u00edln\u00e1 rychlost chlazen\u00ed<\/td>\nStandardizace zp\u016fsobu chlazen\u00ed podle slitiny\/profilu<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

    I p\u0159i dobr\u00e9 kontrole je mal\u00e1 odchylka norm\u00e1ln\u00ed. Velk\u00fd rozd\u00edl (nap\u0159\u00edklad zm\u011bna tvrdosti o 10 % v cel\u00e9 tlou\u0161\u0165ce st\u011bny) v\u0161ak m\u016f\u017ee v\u00e9st k probl\u00e9m\u016fm s v\u00fdkonem. Proto dobr\u00e9 lisovny za\u0159azuj\u00ed do sv\u00fdch v\u00fdrobn\u00edch postup\u016f odb\u011br vzork\u016f tvrdosti a kontrolu procesu. Pom\u00e1h\u00e1 to tak\u00e9, kdy\u017e z\u00e1kazn\u00edci vy\u017eaduj\u00ed certifik\u00e1ty \u0161ar\u017e\u00ed nebo protokoly o zkou\u0161k\u00e1ch konstruk\u010dn\u00edch d\u00edl\u016f.<\/p>\n

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

    Zkou\u0161ky tvrdosti pro vytla\u010dov\u00e1n\u00ed hlin\u00edku maj\u00ed velk\u00fd v\u00fdznam. Spr\u00e1vn\u00e9 pou\u017eit\u00ed Brinella, Rockwella nebo Vickerse pom\u00e1h\u00e1 v\u010das zachytit slab\u00e9 z\u00f3ny. Testov\u00e1n\u00ed ve v\u00edce bodech - nikoliv pouze v jednom vzorku - zaji\u0161\u0165uje jednotnou kvalitu. Spolehliv\u00e9 laborato\u0159e, dobr\u00e9 vybaven\u00ed a disciplinovan\u00fd proces d\u00e1vaj\u00ed jistotu fin\u00e1ln\u00edch d\u00edl\u016f.<\/p>","protected":false},"excerpt":{"rendered":"

    Sructrual Aluminum Extrusion Profiles Ceiling Drop Ceiling Aluminum extrusions sometimes pass visual checks but hide weak spots deep inside. Consistent hardness is often overlooked. Hardness testing ensures extruded aluminum meets strength requirements and avoids failures under load or wear. Understanding different testing methods helps choose reliable suppliers and avoid surprises. Which methods are used to […]<\/p>\n","protected":false},"author":6,"featured_media":7797,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_seopress_robots_primary_cat":"none","_seopress_titles_title":"","_seopress_titles_desc":"","_seopress_robots_index":"","footnotes":""},"categories":[1],"tags":[],"class_list":["post-26918","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-custom-mold"],"meta_box":{"post-to-quiz_to":[]},"_links":{"self":[{"href":"https:\/\/sinoextrud.com\/cs\/wp-json\/wp\/v2\/posts\/26918","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/sinoextrud.com\/cs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/sinoextrud.com\/cs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/sinoextrud.com\/cs\/wp-json\/wp\/v2\/users\/6"}],"replies":[{"embeddable":true,"href":"https:\/\/sinoextrud.com\/cs\/wp-json\/wp\/v2\/comments?post=26918"}],"version-history":[{"count":0,"href":"https:\/\/sinoextrud.com\/cs\/wp-json\/wp\/v2\/posts\/26918\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/sinoextrud.com\/cs\/wp-json\/wp\/v2\/media\/7797"}],"wp:attachment":[{"href":"https:\/\/sinoextrud.com\/cs\/wp-json\/wp\/v2\/media?parent=26918"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/sinoextrud.com\/cs\/wp-json\/wp\/v2\/categories?post=26918"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/sinoextrud.com\/cs\/wp-json\/wp\/v2\/tags?post=26918"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}