涂益友,周兴海,刘伟,蒋建清

• 1:东南大学江苏省先进金属材料高技术研究重点实验室

摘要(Abstract)：

采用扫描电镜观察了不同应变量拉拔变形后SWRH72A钢丝的显微组织,并统计了珠光体片层间距的变化。通过透射电镜分析了变形后铁素体中的位错分布状态,测量了不同应变量拉拔变形后钢丝的力学性能,并基于钢丝微观组织结构建立了钢丝的强化模型。结果表明,随着拉拔应变量的增大,珠光体片层间距逐渐减小,钢丝强度随之升高。综合分析珠光体片层间距和钢丝强度的变化规律得出,应变量较小时,珠光体片层间距较大(>100nm),钢丝加工硬化符合Hall-Patch定律;应变量较大时,珠光体片层间距较小(<100nm),钢丝加工硬化符合奥罗万(Orowan)机制。

关键词(KeyWords)： 冷拔钢丝;微观组织;屈服;强化机制

Abstract:

Keywords:

基金项目(Foundation): 国家“973”前期研究专项(2007CB616900);; 国家科技支撑计划(2007BAE15B05);; 新世纪优秀人才支持计划(SCET-04-11471)

作者(Author): 涂益友,周兴海,刘伟,蒋建清

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