摘要
为对比分析焊接表面状态对扩散焊焊缝质量的影响,针对扩散焊实际生产过程中遇到的影响因素进行了研究,主要验证因素有平面度、机加(数控铣)表面是否处理、表面清洁度及多余物。所有试件除表面状态不同,焊接工艺完全一致。焊后在试件上取拉伸试样,通过测试焊接接头的抗拉强度和分析断口处的形貌,判定焊接表面状态对焊缝质量的影响程度。研究结果表明,焊前零件平整度会影响焊缝质量,需控制焊前零件平面度;机加工(数控铣)后表面不允许处理,需保留原始机加表面,打磨会影响焊缝质量;焊接表面清洗不干净,不允许用清洗剂进行局部清洗,需整体返工清洗;灰尘、毛絮等多余物影响焊缝质量,焊前装配最好在洁净间内进行,且装配工应佩戴头套、口罩、塑胶手套等。
In order to compare and analyze influence of welding surface state on quality of diffusion weld,influencing factors encountered in the actual production process of diffusion welding were studied,and main verification factors included flatness,whether the machined(CNC milling)surface being treated,surface cleanliness and redundancy.All test specimens had the same welding process except surface state.After welding,tensile specimen were taken from test pieces,and influence of welding surface state on weld quality was determined by testing tensile strength of welded joints and analyzing morphology of fracture.The results showed that flatness of parts before welding would affect weld quality,and flatness of parts before welding need to control.The surface was not allowed to treat after machining(CNC milling),the original machined surface need to retain,and grinding would affect weld quality.If welding surface was not clean,cleaning agent was not allowed for local cleaning,and the overall rework cleaning was required.Dust,wool and other excess materials affected weld quality,pre-welding assembly was best to carry out in clean room,and assemblers should wear a hood,mask,plastic gloves,and so on.
作者
杜俊莉
曹海军
郑善伟
马力
杨保琳
Du Junli;Cao Haijun;Zheng Shanwei;Ma Li;Yang Baolin(Avic Jonhon Optronic Technology Co.,Ltd.,Luoyang 471003,Henan,China)
出处
《机械制造文摘（焊接分册）》
2023年第2期31-34,48,共5页
Welding Digest of Machinery Manufacturing
关键词
扩散焊
表面状态
清洁度
多余物
焊缝质量
diffusion welding
surface state
cleanliness
redundancy
weld quality
