低碳超高强度贝氏体钢的组织细化

材料热处理学报, 2007, 28(5): 42-45. doi: 10.3969/j.issn.1009-6264.2007.05.010

低碳超高强度贝氏体钢的组织细化

王六定 ^1, , 朱明 ^2, , 陈景东 ^3, , 施易军 ^4, , 陈国栋 ^5,

1.西北工业大学理学院,陕西,西安,710072

2.西北工业大学材料学院,陕西,西安,710072

3.西北工业大学理学院,陕西,西安,710072

4.西北工业大学理学院,陕西,西安,710072

5.西北工业大学理学院,陕西,西安,710072

基金项目: 国家自然科学基金(50171053)

关键词：贝氏体板条束 , 铁素体板条 , 切变单元 , 超细亚结构 , 残余奥氏体膜

Refinement of structure for low-carbon ultra-high strength bainite steels

对系列低碳、超高强度贝氏体钢(LCUHSBS),通过有效地控制相变温度、冷却速率与回火参数,贝氏体铁素体(BF)含碳量增加、组织细化、碳化物消除以及存在高稳定性、高体积分数的膜状残余奥氏体(AR).利用AFM、SEM等分析并测试了贝氏体钢的显微组织与晶粒尺寸,结果表明,板条束内含有若干大致平行的BF板条,而每一板条由许多切变单元组成;切变单元进一步又分成大量超细亚结构,其直径约为18nm.如此细化的显微组织确保了贝氏体钢在超高强度条件下,冲击吸收能成倍提高.

参考文献

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材料期刊网

低碳超高强度贝氏体钢的组织细化

Refinement of structure for low-carbon ultra-high strength bainite steels

参考文献