Q420q??????????????????
???????????????????????????????壬????????????????????????????????????β????q????????
????????????????????í??????????A3q?????????????????16q????????????????12Mnq??12MnVq??15MnVNq??16Mnq??????????????4.5~50?????
????????
?????????????????λ??????????о???????????????????????B??????? ???塢????塢??????????塢??????????????塢????????? ???????????????????.????.???.????.????.???????и??????????????????????????????????.???.????.????.????.???.????У???????????????????????????ó????
????|?????|?????|?????|?????|?????????|?????????|????|?????|???????????|?????????|???
??????С???????????????????????????????????????????????????????????????????????????????????????????????????????????????????
Q420q???????????????????
?????????????????г????????????????м????е???档?????????????????ó?????????????????????? ??????β???????????????г?????????????????????ó?????????????????????????????????????????? ???????????????????????????
???????? ???????лл ?? ????? ?????Q420q???????????
?????????????27?????Q420q?????????????顪%????