高钒高速钢连续冷却转变曲线的测定与分析
Continuous Cooling Transformation Curves of High Vanadium High Speed Steel
摘 要
利用Gleeble1500D型热模拟试验机测定了新型高钒高速钢在1 000 ℃奥氏体化后以不同冷却速率冷却时的相变膨胀曲线,并用Origin软件绘制了该钢的连续冷却转变 (CCT) 曲线.结果表明:高钒高速钢在连续冷却过程中存在珠光体、贝氏体和马氏体转变;当冷却速率在0.25 ℃/s时,能获得珠光体、贝氏体、马氏体与奥氏体的混合组织;马氏体开始转变的临界冷却速率约为0.5 ℃/s ,其开始转变点Ms低于200 ℃,且随着冷却速率的增大而降低.
CCT曲线
马氏体
high vanadium high speed steel
CCT curve
martensite
Abstract
The swelling capacity in high vanadium high speed steel after austenitizing at 1 000 ℃ and at different cooling rates was tested using a Gleeble 1500D thermal simulation testing machine.The expansion curves of phase transformation and the continuous cooling transformation (CCT) curves have been drawn by Origin software.The results show that the transformation of perlite,bainite and martensite occurre in the continuous cooling process.Perlite,bainite,martensite and residual austenite could be obtained at the cooling rate of 0.25 ℃/s.The critical cooling rate of the steel is 0.5 ℃/s.The martensite start transformation Ms is lower than 200 ℃ and decreases with the increase of cooling rate.
中图分类号 TG146.1
所属栏目
基金项目 河南省重大科技攻关项目(0322020300)
收稿日期 2006/10/13
修改稿日期 2007/1/15
网络出版日期
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备注季英萍(1981-),女,山东临沂人,硕士研究生.
引用该论文: JI Ying-ping,LI Yan,WEI Shi-zhong,LONG Rui,XU Liu-jie. Continuous Cooling Transformation Curves of High Vanadium High Speed Steel[J]. Materials for mechancial engineering, 2007, 31(7): 63～65
季英萍,李炎,魏世忠,龙锐,徐流杰. 高钒高速钢连续冷却转变曲线的测定与分析[J]. 机械工程材料, 2007, 31(7): 63～65
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参考文献
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【5】王金国,周宏,苏源德,等.高碳高钒高速钢的高温硬度及热处理的研究[J].金属热处理,2000(3):22-24.
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