Tam sim no, cov khoom tseem ceeb ntawm cov ntsia hlau yog carbon steel, stainless hlau, thiab tooj liab.
Rau cov pa roj carbon steel, nws muaj cov pa roj carbon tsawg, nruab nrab carbon steel, siab carbon steel thiab alloy steel los ntawm cov ntsiab lus ntawm carbon steel.
1 Tsawg carbon steel C feem pua tsawg dua lossis sib npaug rau 0.25 feem pua Nws feem ntau hu ua A3 steel hauv Suav teb. Nws yog hu ua 1008, 1015, 1018, 1022 thiab hais txog. Feem ntau yog siv rau 4.8 bolts, 4 ceev, me me screws thiab lwm yam khoom uas tsis muaj hardness yuav tsum tau. (Ceeb Toom: Drilling rau tes yog tsim los ntawm 1022 khoom.)
Nruab nrab carbon steel 0.25 feem pua
3 High carbon steel; 0.45 feem pua. Tsis tshua muaj siv nyob rau hauv kev ua lag luam
Alloy steel: Ntxiv cov ntsiab lus hlau rau cov pa roj carbon zoo tib yam kom muaj qee qhov tshwj xeeb ntawm cov hlau, xws li 35, 40 chromium molybdenum, SCM435, 10B38, thiab lwm yam. Fangsheng screws feem ntau siv SCM435 chromium-molybdenum alloy steel, muaj C, Si, Mn, P, S, Cr, thiab Mo.
Ob chav stainless hlau. Kev ua haujlwm siab: 45, 50, 60, 70, 80
1 Cov ntsiab lus tseem ceeb Austenite (18 feem pua Cr, 8 feem pua Ni) muaj cua sov zoo, zoo corrosion kuj, thiab zoo weldability. A1, A2, A4
2 Martensite thiab 13 feem pua Cr muaj qhov tsis zoo corrosion tsis kam, siab zog thiab hnav tsis kam. C1, C2, C4 ferritic stainless hlau. 18 feem pua Cr muaj kev ntxhov siab zoo dua thiab tiv thaiv corrosion dua li martensite. Cov ntaub ntawv ntshuam ntawm lub khw feem ntau yog los ntawm Nyiv. SUS302, SUS304, SUS316 qib.
Peb lub tooj liab. Cov khoom siv yog tooj dag ... zinc-tooj liab alloy. H62, H65, thiab H68 tooj liab yog siv los ua tus qauv hauv kev ua lag luam.