摘要
以轨道交通常用的6005A铝合金焊接接头为研究对象,采用200℃、230℃和250℃对6005A铝合金焊接接头进行火焰调修,研究不同调修温度对铝合金焊接接头微观组织及力学性能的影响。研究结果表明:随着调修温度的升高,6005A铝合金焊接接头的抗拉强度和断后伸长率均呈一定程度的下降。不同调修温度下,焊接接头的微观组织变化不大,焊接接头的硬度分布规律相同,相较于其他调修温度接头,250℃调修接头软化区宽度略有增加。
The 6005A aluminum alloy welded joint commonly used in rail transit was taken as the research object. Flame heat repair of 6005A aluminum alloy welded joints was carried out at 200˚C, 230˚C and 250˚C, and the effects of different flame heat repair temperatures on the microstructure and mechanical properties of aluminum alloy welded joints were studied. The research results show that with the increase of the flame heat repair temperature, the tensile strength and the elongation after fracture of the 6005A aluminum alloy welded joints both decrease to a certain extent. Under different flame heat repair temperatures, the microstructure of welded joints does not change much, and the hardness distribution of welded joints is the same. Compared with other flame heat repair temperature joints, the width of the softened zone of 250˚C adjusted joints is slightly increased.
出处
《机械工程与技术》
2021年第2期261-269,共6页
Mechanical Engineering and Technology
