Ti和Mn含量对CSP工艺Ti微合金钢析出特征与强化机理的影响

金属学报, 2011, 47(12): 1541-1549. doi: 10.3724/SP.J.1037.2011.00382

Ti和Mn含量对CSP工艺Ti微合金钢析出特征与强化机理的影响

王长军 ^1, , 雍岐龙 ^2, , 孙新军 ^3, , 毛新平 ^4, , 李昭东 ^5, , 雍兮 ^6,

1.钢铁研究总院结构材料研究所,北京,100081

2.钢铁研究总院结构材料研究所,北京,100081

3.钢铁研究总院结构材料研究所,北京,100081

4.广州珠江钢铁有限责任公司,广州,510730

5.钢铁研究总院结构材料研究所,北京,100081

6.钢铁研究总院结构材料研究所,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： CSP , Ti微合金钢 , 强化机理 , 力学性能

EFFECTS OF Ti AND Mn CONTENTS ON THE PRECIPITATE CHARACTERISTICS AND STRENGTHENING MECHANISM IN Ti MICROALLOYED STEELS PRODUCED BY CSP

利用电子背散射衍射(EBSD)技术和高分辨透射电子显微镜(HRTEM)对不同Ti和Mn含量的CSP工艺Ti微合金钢进行了显微组织分析与析出相特征观察.结果表明:与Ti和Mn含量较低的钢相比,Ti和Mn含量较高的钢中,不仅小角度晶界分布比例较高,同时颗粒尺寸在10 nm以下的TiC粒子析出数量显著增加,而较大尺寸的M3C相(Re3C)析出数量却有所减少.此外,强化机理分析表明,细晶强化与位错强化对两实验钢的屈服强度贡献最大,而沉淀析出强化是造成两实验钢强度差别的主要原因.

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Ti和Mn含量对CSP工艺Ti微合金钢析出特征与强化机理的影响

EFFECTS OF Ti AND Mn CONTENTS ON THE PRECIPITATE CHARACTERISTICS AND STRENGTHENING MECHANISM IN Ti MICROALLOYED STEELS PRODUCED BY CSP

参考文献