GH4169高温合金焊接接头的组织与性能

• 作 者: 余凌锋 梁宇 周磊
• 机 构: 贵州大学材料与冶金学院,贵州省材料结构与强度重点实验室,
• 出 处: 金属热处理
• 发表日期: 2014年04期
• 关键词: 焊接接头 GH4169 高温合金 焊接接头组织 顶锻力 焊接热影响区 镍基高温合金 焊接温度场 再结晶 显微组织

对GH4169镍基高温合金型材对焊接头的显微组织与力学性能进行了研究,分析了顶锻力对焊接接头组织的影响。结果表明,GH4169高温合金的焊接接头主要由焊缝区、完全再结晶区、不完全再结晶区和未再结晶区组成,各个区域硬度具有明显差异;焊接温度场与顶锻参数之间的配合决定了焊接接头的显微组织;无顶锻焊接由于塑性变形不足,裂纹易在组织粗大的热影响区内萌生与扩展,导致焊接接头力学性能恶化。

The microstructure and mechanical properties of GH4169 Ni-based superalloy butt welded joints were studied, and the effect of upset force on the welded joints was analyzed. The results show that the welded joint of GH4169 superalloy mainly consists of weld zone, complete recrystallization zone, incomplete recrystallization zone and non-recrystallized zone. The hardness of each zone has obvious difference. The cooperation between welding temperature field and upsetting parameter Which determines the microstructure of the welded joint. Because of the lack of plastic deformation, the crack is easy to initiate and expand in the coarse heat-affected zone of the tissue, which leads to the deterioration of the mechanical properties of the welded joint.