?????????????
????????????????????????????????????????ú??????β????q????????
????????????????????????A3q??????????????16q????????????????12Mnq??12MnVq??15MnVNq??16Mnq????????????4.5~50?????
???????????
?????????????
6??1800??8000 80??
10??1800??8000 76??
8??1800??8000 90??
10??2000??8000 35??
12??2000??8000 42??
14??2000??8000 21??
????7??11?????20*1800*C??Q420q??????????????????
