(1. 兰州理工大学 甘肃省有色金属新材料省部共建国家重点实验室,
兰州 730050;
2. 青海油田建设有限责任公司, 敦煌 736202)
摘 要: 针对H62黄铜进行搅拌摩擦焊实验研究， 初步分析工艺参数对接头的组织及力学性能的影响。 结果表明:当焊接速度与搅拌头旋转速度的比值保持在0.09～0.15之间， 压入深度在0.1～0.2 mm之间时, 可得到组织致密、 无孔洞的搅拌摩擦焊接头; 用搅拌摩擦焊得到的黄铜接头的力学性能比母材低， 但比熔化焊得到的接头性能要高， 其平均抗拉强度可达到母材的88％。
关键字: 黄铜； 搅拌摩擦焊； 焊接参数； 动态再结晶
（ 1. State Key Laboratory of Gansu Advanced Non-ferrous Metal Materials, Lanzhou University of Technology, Lanzhou 730050, China;
2. Qinghai Oilfield Construction Co., Ltd., Dunhuang 736202, China）
Abstract: The welding of H62 brass alloys in friction stir welding was investigated. The influence of welding parameters on the microstructures and properties of joint was also studied. The results show that good microstructures and properties of joint can be attained when the ratio of the welding velocity to rotating speed is in the range of 0.09- 0.15 and the press depth of the rotating shoulder is 0.1-0.2 mm. It is also discovered that the mechanical properties of the friction stir welded H62 brass alloys joint are lower than those of parent metal, but are higher than those of joints by other conventional fusion welding processes. The average value of tensile strength of the joint can achieve 88% of strength of the parent metal.
Key words: brass alloys; friction stir welding; welding parameters; dynamic recrystallzation
