卞宏友,董文启,曲伸,杨光,王维,王伟

• 1:沈阳航空航天大学航空制造工艺数字化国防重点学科实验室
• 2:沈阳黎明航空发动机(集团)有限责任公司焊接研究所

摘要(Abstract)：

研究了不同热处理方式下激光沉积修复GH4169合金试样的显微硬度分布变化特点以及拉伸断口形貌特征与变化情况。结果表明:沉积态试样修复区内的硬度平均值为297 HV0.1,热影响区的硬度值为260 HV0.1,均明显低于硬度值为460 HV0.1的基体。热处理后,修复区与热影响区硬度均明显提高,接近于基体硬度。相比于沉积态试样,局部热处理试样平均硬度增加了159 HV0.1,增加53.5%;真空热处理试样平均硬度增加了168 HV0.1,增加56.6%,略高于局部热处理。沉积态与热处理试样拉伸断口均为典型的韧性穿晶断裂,两种热处理方式下拉伸断口的韧窝尺寸变化不大。试验表明局部热处理和真空热处理都可达到提高拉伸性能的目的。

关键词(KeyWords)： 激光沉积修复;GH4169合金;热处理;显微硬度;拉伸断口

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51375316);; 航空科学基金(2014ZE54028);; 辽宁省高等学校科学研究项目(L2014054)

作者(Author): 卞宏友,董文启,曲伸,杨光,王维,王伟

DOI: 10.13289/j.issn.1009-6264.2017.02.012

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