贝氏体相变温度对含Ti和Mo低碳热轧TRIP钢的组织与力学性能影响及析出相的微观结构表征

金属学报, 2013, 49(4): 399-407. doi: 10.3724/SP.J.1037.2012.00745

贝氏体相变温度对含Ti和Mo低碳热轧TRIP钢的组织与力学性能影响及析出相的微观结构表征

王长军 ^1, , 孙新军 ^2, , 雍岐龙 ^3, , 李昭东 ^4, , 张熹 ^5, , 江陆 ^6,

1.钢铁研究总院工程用钢研究所,北京,100081

2.钢铁研究总院工程用钢研究所,北京,100081

3.钢铁研究总院工程用钢研究所,北京,100081

4.钢铁研究总院工程用钢研究所,北京,100081

5.钢铁研究总院工程用钢研究所,北京,100081

6.钢铁研究总院工程用钢研究所,北京,100081

基金项目: 国家重点基础研究发展计划资助项目2010CB630805

关键词： TRIP钢 , (Ti,Mo)C , 残余奥氏体 , 贝氏体相变

EFFECT OF BAINITIC TRANSFORMATION TEMPERATURE ON THE MICROSTRUCTURES AND MECHANICAL PROPERTIES OF THE HOT ROLLED TRIP STEEL CONTAINING Ti AND Mo AND ITS PRECIPITATION CHARACTERISTICS

采用SEM与HRTEM对不同贝氏体相变温度下的热轧TRIP钢进行了显微组织观察和含Ti析出相特征分析.结果表明:贝氏体相变温度对钢的组织形貌、残余奥氏体含量和力学性能均有较大影响,在400℃贝氏体相变温度下,钢的残余奥氏体含量和强塑积均达到最佳值,分别为17.13％和23.87 GPa.％.HRTEM表征和分析发现,钢中存在两类纳米级(Ti,Mo)C析出粒子:一类为奥氏体内析出且与铁素体基体满足(100)(Ti,M.)C∥(110)α-Fe,[011](Ti,M.)C∥[111]α-Fe位向关系；另一类为铁素体内析出且与铁素体基体满足Baker-Nutting位向关系:(100)(Ti,M.)C∥(100)α-Fe,[011](Ti,M.)C∥[001]α-Fe.

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