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?????????????
????1??????????????????
???????????GB/T3524-1992 ??GB/T8164-1993??QJ/HG02.22-1995
??????????2.0-5.0mm ????? 100-230mm
?????????HG5 ??Q215?? Q235
????2???????????????????
???????????GB8749-1998 ??GB/T8164-1993 size="3">??
??????????2.5-4.5mm ????? ?????10# ??20#?? 45#??50# ??40Mn?? 45Mn??65Mn
????3??????????г?????????
?????????QJ/HG02.15-1991
??????????2.75-4.5mm ?????125-205mm
?????????ZL20MnSi
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?????????Half-Heusler???????????????????о?
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