奥氏体变形对22CrSH齿轮钢连续冷却相变的影响

材料科学与工艺, 2005, 13(6): 572-575. doi: 10.3969/j.issn.1005-0299.2005.06.005

奥氏体变形对22CrSH齿轮钢连续冷却相变的影响

王秉新 ^1, , 徐旭东 ^2, , 刘相华 ^3, , 王国栋 ^4,

1.辽宁石油化工大学,机械工程学院,辽宁,抚顺,113001;东北大学,轧制技术及连轧自动化国家重点实验室,辽宁,沈阳,110004

2.东北大学,轧制技术及连轧自动化国家重点实验室,辽宁,沈阳,110004

3.东北大学,轧制技术及连轧自动化国家重点实验室,辽宁,沈阳,110004

4.东北大学,轧制技术及连轧自动化国家重点实验室,辽宁,沈阳,110004

基金项目: 科技部科研项目(G2000067208-4)

关键词：齿轮钢 , 奥氏体变形 , 相交 , 显微组织

Effect of deformation of austenite on continuous cooling transformation for 22CrSH gear steel

为了研究奥氏体变形对22CrSH齿轮钢连续冷却相变的影响,在Gleeble 1500热模拟机上,将22CrSH钢在950℃变形0.4及未变形处理,然后连续冷却.利用膨胀曲线、光学显微镜、透射显微镜,结合各种腐蚀方法,分析了22CrSH钢相变行为及相变组织.研究表明:奥氏体变形使多边形铁素体加珠光体混合组织的临界冷速增大;当奥氏体变形及降低冷速时,大量的晶界仿晶型铁素体占据了奥氏体晶界,贝氏体相变向针状铁素体相变转变;变形使奥氏体在中温相变区稳定性增加,室温组织中M/A岛的数量增多.

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材料期刊网

奥氏体变形对22CrSH齿轮钢连续冷却相变的影响

Effect of deformation of austenite on continuous cooling transformation for 22CrSH gear steel

参考文献