技能培训资料：常用钢的相变临界点.docx
6页
常用钢的临界点牌号临界点/℃Ac1Ac3或AccmAr1Ar31072587068285010Mn2A72083062071412CrNi3A695800659726100CrNi3A680---12Cr2Ni4A670780575660100Cr2Ni4A670---1572587068585015Mn73586368584015SiMn2MoVA722848491-15Cr735870720-15CrMnA750848--15CrMnMoVA765870--18Mn2CrMoB741854--18Cr2Ni4WA695800350-100Cr2Ni4WA655～695---2073585568083520Mn73585468283520Mn2690820(610)(760)20Mn2B73083561373020MnVB72084063577020MnTiB(720)84362579520MnMoB73885069375020Cr76683870279920CrV76884070478220CrMnB-89062274920CrNi73580566079020CrNi3A710790--20Cr2Ni4A70577057566022CrMnMo7108306207403073281367779630Mn271880462772730Mn73481267579630SiMnMoV740845--30Si2Mn2MoWV739798--30CrMnSi76083067070530CrMo75780769376330CrMnTi76579050074030CrMnSiNi2A750～760805～830--30CrNi3705750--35SiMn750830645-35CrMoV755835600-35CrMo75580069575035CrMnSi76083067070538Cr74078069373038CrMoAl800840730-37CrNi3710770640-38CrSi7638106807554072479068076040Mn72679068976840Mn271376662770440MnB73078065070040MnVB73077463968140Cr74378269373040CrV75579070074540CrMnMo735780680-40CrSi755850--40CrMnSiMoV780830--40CrMnSiMoVRe72585062571540Cr5M02VSi85391572083040SiMnMoVRe76590062573040CrNi73176966070240CrNiMo710790--40CrMo730780--4572478068275145Mn271577064072045Mn2V725770--45Cr7217716606935072076569072050Mn720760660-50Mn271076059668050Cr72177166069250CrV75278868874650CrMn750775--5572777469075555Si2Mn775840--55Si2MnB764794--55Si2MnVB765803--6072776669074360Mn72776568974160Si2Mn7558107007706572775269673065Mn7267656897417073074369372785723737-695T7730770700-T8730-700-T10730800700-T11730810700-T12730820700-SiMn760865708-9SiCr770870730-CrWMn750940710-3Cr2W8V8201100790-3Cr2W88101100--W18Cr4V8201330760-W9Cr4V2810-760-3Cr3Mo3VNb836～948-771～923-Cr12V810-760-Crl2MoV815---Cr12Mo8101200760-5CrMnMo710760650-5CrNiMo710770680-GCr15745900700-GCr15SiMn7708727081Cr137308507008202Cr13820950780-3Cr13780～850---4Cr13790～850---Cr17Ni2810-710-9Cr18830-810-4Cr9Si29009708108704Cr10Si2Mo850950700845Mn13----。
