Raws li qhov xav tau ntawm kev lag luam kho vajtse tam sim no, kev siv cov khoom siv rau cov khoom siv rau cov khoom siv kuj tseem ceeb heev, thiab cov chaw sib txawv yuav siv cov khoom siv sib txawv, cov khoom siv sib txawv ntawm cov qauv kev ua tau zoo kuj txawv.
Carbon steel: Peb paub qhov txawv ntawm cov pa roj carbon tsawg, nruab nrab carbon steel thiab siab carbon steel thiab alloy steel los ntawm cov ntsiab lus ntawm cov khoom siv carbon steel.
1.low carbon steel C feem tsawg dua los yog sib npaug rau 0.25 feem pua feem ntau yog hu ua A3 steel. Txawv teb chaws yeej hu ua 1008,1015,1018,1022 thiab hais txog. Feem ntau yog siv rau 4.8 qib bolts thiab 4 qib ceev, me me screws thiab lwm yam khoom uas tsis tas yuav hardness. (Ceeb Toom: Tail-drilling ntsia hlau yog tsim los ntawm 1022 khoom.)
2. Nruab nrab carbon steel 0.25 feem pua< c%≤0.45%="" is="" usually="" referred="" to="" as="" 35,="" 45="" steel="" at="" home,="" and="" basically="" referred="" to="" as="" 1035,ch38f,1039,40acr="" abroad.="" it="" is="" mainly="" used="" for="" class="" 8="" nuts,="" class="" 8.8="" bolts="" and="" class="" 8.8="" inner="" hexagonal="">
3. high carbon steel C%>0.45 feem pua. NW nyuam qhuav nyob rau hauv lub lag luam tam sim no
4. alloy steel: nyob rau hauv cov pa roj carbon dav hlau ntxiv cov ntsiab lus alloy, nce qee cov khoom tshwj xeeb ntawm cov hlau: xws li 35, 40 chromium molybdenum, SCM435,10B38. Panvo screws feem ntau siv SCM435 chromium molybdenum alloy hlau, cov khoom tseem ceeb yog C, Si, Mn, P, S, Cr, Mo.
Stainless hlau: Qib kawm: 45,50,60,70,80
Lub ntsiab austenite (18 feem pua Cr, 8 feem pua Ni) zoo thaum tshav kub kub ua hauj, zoo corrosion kuj, zoo weldability. A1, A2, A4 martensite, 13% Cr, tsis zoo corrosion kuj, siab zog, zoo hnav tsis kam. C1, C2, C4 ferritic stainless hlau. 18 feem pua Cr muaj peev xwm chim siab thiab corrosion kuj zoo dua li martensite. Tam sim no, cov ntaub ntawv tuaj txawv teb chaws ntawm kev ua lag luam yog cov khoom lag luam Japanese. Muaj peb theem: SUS302, SUS304, thiab SUS316.
Copper: Cov khoom siv yog tooj dag... Zinc tooj liab alloy. Lub khw tseem ceeb nrog H62, H65, H68 tooj liab txheem qhov chaw.
