免热处理高强度低屈强比铆螺钢的研究

钢铁, 2006, 41(1): 62-65.

1.轧制技术及连轧自动化国家重点实验室(东北大学),辽宁,沈阳,110004

2.轧制技术及连轧自动化国家重点实验室(东北大学),辽宁,沈阳,110004;沈阳航空工业学院材料系,辽宁,沈阳,110034

3.轧制技术及连轧自动化国家重点实验室(东北大学),辽宁,沈阳,110004

基金项目: 中国科学院资助项目(50334010)

Study of High Strength and Low Yield Ratio Cold Heading Steel not Requiring Heat Treatment

铆螺钢经棒材轧机控轧控冷轧成棒材,获得具有铁素体、珠光体和粒状贝氏体的混合组织,冷镦成螺栓后进行产品检验.结果表明:控轧控冷后的棒材不经过退火直接冷镦成螺栓,冷镦性能非常好.螺栓不经过最终热处理,同样可获得很高的力学性能.力学性能的提高主要是由于螺栓在拉伸变形时残余奥氏体的应变诱导马氏体相变.

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