(1) Steel txhaj: steel raug
Lub hardness ntawm kev txhaj tshuaj steel feem ntau HRC40 ~ 50, thiab kev coj ua cov hlau tawv tuaj yeem ua rau muaj qhov nyuaj rau HRC57 ~ 62. Lawv qhov kev nruj yog qhov zoo dua, kev pab cuam lub neej yog ob peb zaug ntawm cam khwb cia hlau txhaj, thiab lawv tau siv dav.
(2) Cam khwb cia hlau
Lub hardness ntawm cam khwb cia hlau txhaj tshuaj yog HRC58 ~ 65, uas yog nkig heev, yooj yim kom tawg, lub neej luv luv, thiab tsis siv dav. Nws yog tsuas yog siv nyob rau hauv qhov chaw uas siab txhaj koob tshuaj tivthaiv peening lub zog yuav tsum tau.
(3) Iav txhaj
Lub hardness ntawm lub khob txhaj koob tshuaj tiv thaiv yog qis dua thawj ob txhaj. Nws yog tsuas yog siv rau stainless hlau, titanium, txhuas, magnesium thiab lwm yam xwm txheej uas hlau paug tsis pub. Nws kuj tseem siv tau rau qhov kev kho mob thib ob tom qab steel txhaj koob tshuaj tiv thaiv kom tshem tawm hlau. Kev sib kis thiab txo qhov saum npoo ntawm qhov chaw ntawm qhov.
