秦芳诚,李永堂,齐会萍

• 1:太原科技大学材料科学与工程学院

摘要(Abstract)：

在Gleeble-3500热力模拟机上对铸态42Cr Mo中碳低合金钢进行热压缩实验,利用金相显微镜(OM)、扫描电镜(SEM)以及电子背散射衍射(EBSD)技术分析热变形和880℃/2 h正火后的组织与微织构。实验结果表明:变形条件为1000℃/0.1 s-1时,在形变带和三叉晶界处新生再结晶晶粒,平均晶粒直径小;沿着<001>//ND分布旋转立方织构和立方织构;880℃/2 h正火过程中晶粒发生长大,晶粒内弥散分布碳化物颗粒,主要发生回复和静态再结晶,织构类型为立方织构和高斯织构。在1100℃/0.1 s-1条件下,晶粒尺寸较大,组织均匀,再结晶充分,大角度晶界占三分之二;织构组态为{001}<110>织构和沿着ξ-取向线的{110}<112>织构;正火后碳化物含量增加,珠光体片层间距减小,组织演变机制为高温回复与亚动态再结晶,织构类型表现为{110}<112>取向密度减小,旋转立方织构取向密度增大。

关键词(KeyWords)： 铸态42CrMo钢;正火;微织构;EBSD;大角度晶界

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金重点项目(51135007);国家自然科学基金(51174140,51205270,51575371);; 高等学校博士点优先发展计划(20111415130001);; 山西省回国留学人员科研(2011-084)资助项目

作者(Author): 秦芳诚,李永堂,齐会萍

DOI: 10.13289/j.issn.1009-6264.2016.05.019

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