??????????????-20#???????"?"42CrMo???????
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42CrMo?????:
42CrMo??????????
??????????????λ?????????????????????????????????????????40Cr??42CrMo?????
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?????????????????????????????????????????????????????????????1.5%??????????????????????????????????????????????????????????????????????????????"1"????????"12CrMoV"??"12Cr1MoV"???????????0.4-0.6%???????0.9-1.2%?????????????????????????????????1.5%????2.5%????3.5%??????????????????????????????????????2??3??4???????????18Cr2Ni4WA??
????????е??V????Ti????AL????B?????RE???????????????????????????????????????б????????20MnVB???С????0.07-0.12%?????0.001-0.005%??
??????????????????????"A"???????????????????
??????????????????????????????????????????????????????í??????30CrMnSi?????????ML30CrMnSi??
?????????????????????????????????????????????????????????????????????????????????????????С???????????????????????????????????????????????????????????,??????????????20#??45#??16MN??Q345??A/B/C/D/E????27SIMN??15CrMO??12Cr1MOV??10CrMO910??304??304L??316??316L??321??P11??P22??P91??T91.??й???GB8162-99?????GB8163-99????????????ù?????????GB3087-99??GB5310-85????????ˉ?ù??GB5312-8???ù??...
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