等温时间对60Si2Mn钢下贝氏体组织性能的影响

材料热处理学报, 2014, 35(9): 146-150.

等温时间对60Si2Mn钢下贝氏体组织性能的影响

王猛 ^1, , 王立峰 ^2, , 王全礼 ^3, , 张玮 ^4, , 李龙飞 ^5, , 孙祖庆 ^6,

1.北京科技大学新金属材料国家重点实验室,北京 100083;首钢技术研究院,北京 100043

2.首钢技术研究院,北京 100043

3.首钢技术研究院,北京 100043

4.首钢技术研究院,北京 100043

5.北京科技大学新金属材料国家重点实验室,北京 100083

6.北京科技大学新金属材料国家重点实验室,北京 100083

关键词：等温淬火 , 下贝氏体 , 显微组织 , 力学性能

Influence of isothermal time on microstructure and properties of low bainite in 60Si2Mn steel

Keywords： isothermal quenching , low bainite , microstructure , mechanical properties

通过热模拟实验和盐浴淬火处理,研究了60Si2Mn钢盘条奥氏体化后在300℃等温盐浴淬火时的组织演变规律及相应的力学性能,结果表明:在300℃等温盐浴淬火,形成下贝氏体,相变孕育期约为100 s,相变完成时间约为3000 s.随等温时间延长,材料抗拉强度缓慢降低,而面缩率不断增加,等温3000 s后,材料抗拉强度保持在1800 MPa以上,面缩率可达到50％.组织分析结果显示,下贝氏体由针状铁素体和纳米级条状奥氏体组成,起到提高材料韧性的作用.

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等温时间对60Si2Mn钢下贝氏体组织性能的影响

Influence of isothermal time on microstructure and properties of low bainite in 60Si2Mn steel

参考文献