Cr12MoV冷作模具钢在深冷处理过程中的相变研究

来源期刊：上海金属2011年第3期

论文作者：李向军 李绍宏 闵永安 吴晓春

文章页码：23 - 26

关键词：Cr12MoV冷作模具钢； 深冷处理； 相变； 差示扫描量热仪； 电阻

Key words：Cr12MoV Cold Working Die Steel； Cryogenic Treatment； Phase Transition； DSC； Electrical Resistance

摘    要：采用DSC热分析及电阻测定等物理测试手段,对Cr12MoV钢在深冷处理过程中的相变进行了研究。结果表明,经冷处理后的试样在加热过程中有更多的碳化物析出,经过-196℃深冷处理的比-79℃冷处理的析出量更多。深冷处理促使残余奥氏体进一步向马氏体转变以及碳化物析出,是提高冷作模具钢尺寸稳定性和耐磨性能的一种有效措施。

Abstract: Phase transformation of Cr12MoV cold working die steel during cryogenic process was studied by DSC thermal analysis and electrical resistance measurement.The results showed that more carbide precipitated from the cryogenic treated samples at high temperature tempering,more carbide precipitated after the -196 ℃ treatment than that of -79 ℃.The cryogenic treatment promoted the retained austenite to transform into martensite and the carbide to precipitate,which was an efficient mean of improving dimensional stability and wear resistance of cold working die steel.