王恒辉,万响亮,李光强,王红鸿,吴开明

• 1:武汉科技大学钢铁冶金及资源利用省部共建教育部重点实验室
• 2:武汉科技大学国际钢铁研究院

摘要(Abstract)：

采用金属包埋切片微米-纳米表征法和电子背散射衍射技术分别研究了焊缝金属中针状铁素体形核夹杂和联锁组织特征。结果表明,由于Mn元素扩散到夹杂物内部使得周围形成贫Mn区,诱发针状铁素体在复合夹杂物上形核。同时针状铁素体还可以在已经形成的铁素体表面激发形核;铁素体生长过程中同原奥氏体保持固定取向关系;铁素体相互之间发生硬碰撞和交错现象;这些因素共同形成针状铁素体联锁组织。这种细小有效晶粒尺寸的针状铁素体联锁组织具有良好的强韧性匹配。

关键词(KeyWords)： 焊缝;针状铁素体;力学性能;晶粒细化;电子背散射衍射

Abstract:

Keywords:

基金项目(Foundation): 中国博士后科学基金第55批面上资助(2014M550414);; 武汉科技大学钢铁冶金及资源利用省部共建教育部重点实验室开放基金(FMRU201306)

作者(Author): 王恒辉,万响亮,李光强,王红鸿,吴开明

DOI: 10.13289/j.issn.1009-6264.2014.12.021

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