迟露鑫,吴玮

• 1:重庆理工大学材料科学与工程学院
• 2:特种焊接材料与技术重庆市高校工程研究中心(重庆理工大学)
• 3:重庆市高校模具技术重点实验室(重庆理工大学)

摘要(Abstract)：

针对某公司的45钢摩擦焊杆,采用材料结构分析技术研究了热处理对接头组织性能的影响。结果表明,热处理前焊接接头为先共析铁素体+珠光体+魏氏体的粗大组织,母材为珠光体和沿晶界铁素体组织,焊缝的显微硬度最大,热影响区其次,母材最小,拉伸试样断裂位置在母材;经过正火、淬火和回火的热处理后,焊接接头组织变得细小而均匀,为回火索氏体+贝氏体+少量沿晶界铁素体混合组织,焊缝和母材的显微硬度基本接近,拉伸试样断裂位置在正火区与不完全正火区的交界处,冲击断裂面平直,呈现脆性断裂特征,为准解理+二次裂纹+撕裂状韧窝+夹杂物条带状。

关键词(KeyWords)： 45钢;摩擦焊;热处理工艺;组织性能

Abstract:

Keywords:

基金项目(Foundation): 重庆高校优秀成果转化资助重大项目(KJZH11215);; 重庆理工大学科研启动基金项目(2012ZD47);; 特种焊接材料与技术重庆市高校工程研究中心开放课题基金(SWMT201504)

作者(Author): 迟露鑫,吴玮

DOI: 10.13289/j.issn.1009-6264.2015.01.020

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