???????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????ˉ???????????????????????16Mn????????????????ù?????????????????????????????????????????????????????????
????????????:10#??20#??35#??45#??20G??40Cr??20Gr??16Mn-45Mn??27SiMn??Cr5Mo??12CrMo(T12)??12Cr1MoV??12Cr1MoVG??10CrMo910?? 15CrMo??15CrMoG??35CrMo??40CrMo????????б???У?GB/T8162-2008??GB/T8163-2008??GB/T3087-2008??GB/T5310-2008??GB/T6479-2000??GB/T9948-2006??GB/T5312-1999???????????20G?????16mn???????????????????????gb3087???????ˉ??????????????ù????????ù??gb5310?????27SiMn????????15crmo?????12cr1movg???????????????
37Mn5????????
37Mn5?????J55???????????????????????????????
????(1)???????????????У??1??????????????????????????????????μ??????????????????????????????н????????
????????????????????????API5A??5AX??5AC???????H-40??J-55??N-80??P-110??C-75??C-95??????????139.77.72R-2??177.89.19R-2??244.58.94R-2??244.510.03R-2??244.511.05R-2???
????(2)API?漲?????????????R-1?4.88??7.62m??R-2?7.62??10.36m??R-3?10.36m????????
????(3)?????????????LTC?????????????????
????(4)?????????????????API???????????????????????????(???????????????????)???????NC-55E??NC-80E??NC-L80??NC-80HE???
????(5)?????????У????????????????????????????????????????????J????????????????????????????????????????
??????????????????????????????????????????????????????????????С????????????????????????????????????????????????á??????(DZ)?????????????????DZ40??DZ55??DZ753???
?????λ???
?? ? ? ?? 
