【作者】 薛维华； 齐晓旭； 李智超；

【Author】 XUE Weihua~1,QI Xiaoxu~(1,2),LI Zhichao~1 (1.College of Materials Science & Engineering,Liaoning Technical University,Fuxin 123099,China; 2.Fuxin Cost Administration of Building Engineering,Fuxin 123099,China)

【机构】 辽宁工程技术大学 材料科学与工程学院； 阜新市建设工程造价管理处；

【摘要】 为提高矿用截齿钎焊连接性能,优化和协调截齿生产时的钎焊和截齿体热处理工艺,研究了锌白铜硬钎料BCu48ZnNi钎焊过程中组织、性能的变化,考察了BCu48ZnNi的使用特性并与黄铜钎料BCu60Zn进行了对比。实验显示,BCu48ZnNi钎料对钢的润湿性明显优于BCu60Zn。比照钎料钎焊过程,对钎料进行重熔凝固与固溶、时效等处理,分析测试了不同状态下的组织和性能。结果表明,BCu48Zn Ni和BCu60Zn钎料在不同状态下均为两相组织,BCu48ZnNi的组织较细小,相同状态下硬度大于BCu60Zn。采用中频感应方法进行截齿钎焊实验,考察了焊后冷却方式和截齿热处理对钎焊缝抗剪强度的影响。实验发现,焊后空冷的BCu48ZnNi钎焊缝抗剪强度高于缓冷与快冷,焊后高温回火条件下BCu48ZnNi钎焊缝能够保持理想的抗剪强度。更多还原

【Abstract】 For the purpose of enhancing the brazing joint properties,optimizing and coordinating the brazing and pick body heat treatment;the changing of microstructure and the properties of packfong brazing alloy BCu48ZnNi were studied;the performance of BCu48ZnNi was researched and it was also compared with brass brazing alloy BCu60Zn.It was found that the wetting property to steels of BCu48ZnNi was better than that of BCu60Zn.Comparing with the brazing process,the brazing alloy was treated with re-melting and solidifying,solid solution and aging;the microstructure and the properties were tested. The results showed that the microstructure of BCu48ZnNi and BCu60Zn both was double phase, BCu48ZnNi had refined microstructure and its hardness was harder than that of BCu60Zn.The pick brazing experiments was implemented with medium-frequency induction method,and the influence of cooling modes and heat treatments upon the shearing strength of brazing joint was researched.It was discovered that the shearing strength with air cooling was larger than that with slowly and fast cooling,and BCu48ZnNi brazing joint could retain ideal shearing strength with high tempering after brazing.更多还原