9洛鋼和Dc53哪個鋼材質好？
1??9Cr15Mov???????????C??8.8-9.5%????????Cr??15%??????Mo??0.5%????????58-60HRC,????????????????????????????????y???????м臨??9?????????????????????????????????и??????????????????????????п????????????????????????????ù????б????????
2??440C???1.05%????13.5%-14%?????0.5%??4%????0.4%,??0.4%,??0.3%-0.8%????0.03%????0.03%??440C?????е?????????????и??????????????????????????????????????????????????60HRC??????????????????????и??????????У???????????????????????????????????????к?????????????????????????????????????????????????
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