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sa516gr70n中n有何含義?
發布時間:2016-12-12 16:00瀏覽次數:
SA516Gr70是熱軋板,SA516Gr70N,有N表明是正火板,就是多了一道正火熱處理,相比較而言,正火是為了晶粒細化和碳化物分布均勻化,去除材料的內應力,降低材料的硬度。
材料的韌性會提高,也就提高了低溫性能。
綜合性能提高了一些,價格也貴了一些。
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国产亚洲精久久久久久无码
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