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xi tu dui 20mn gang lian xu leng que xiang bian he xian wei zu zhi de ying xiang
Author(s): 
Pages: 8-13
Year: Issue:  3
Journal: Ordnance Material Science and Engineering

Keyword:  混合稀土连续冷却相变曲线20Mn钢显微组织形态;
Abstract: 通过测定连续冷却相变(CCT)曲线和观察显微组织,研究了不同稀土含量对20Mn钢相交和组织的影响。稀土扩大了CCT图上铁素体和贝氏体转变区域,缩小珠光体转变区域。稀土使马氏体条束变小变窄,有利于形成粒状贝氏体和块状铁索体。稀土通过细化臭氏体晶粒、减少臭氏体中碳固溶量和抑制碳化物析出,使20Mn钢的淬透性交差并使相交产物发生变化。
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