XIE Guisheng, WU Yuan, LIU Yiquan.Research on Cadmium-free Substitution of the Brazing Filler Meterial for Motor Rotor[J].Electric Welding Machine, 2023, 53(12): 46-50. DOI： 10.7512/j.issn.1001-2303.2023.12.07.
Research on Cadmium-free Substitution of the Brazing Filler Meterial for Motor Rotor
针对某型机车电机转子端环与导条钎焊用含镉钎料BAg40CuZnCdNi因列入限用禁用物质目录，急需替代为无镉钎料的问题，采用无镉钎料BAg55ZnCuSn和钎剂SAXONIA Braze Tec h Paste-Type-FH10与原含镉钎料和钎剂QJ102进行对比验证。运用化学分析法对验证用钎料进行化学成分分析，DSC熔化温度测试仪（温升曲线法）进行钎料熔化范围分析，高温润湿炉进行钎剂流铺性和钎料润湿性分析，确定了无镉钎料与钎剂的最优组合。转子工艺模卡验证结果表明，电机转子模卡端环与导条钎焊接头拉伸断裂于导条热影响区，力学性能合格，无镉钎料BAg55ZnCuSn和钎剂SAXONIA Braze Tec h Paste-Type-FH10可以用于该型机车电机转子无镉化替代。
Aiming at the problem that BAg40CuZnCdNi, a cadmium-containing brazing filler metal used for brazing the rotor end ring and conducting bar of a certain locomotive motor, needs to be replaced by non-cadmium-containing brazing filler metal due to its inclusion in the list of prohibited substances. Cadmium free brazing filler metal BAg55ZnCuSn and SAXONIA Braze Tec h Paste-Type-FH10 were used to compare with the original cadmium containing brazing filler metal and flux QJ102. The chemical composition of the verification brazing filler metal was analyzed by chemical analysis method, the melting range of brazing filler metal was analyzed by DSC melting temperature tester (temperature rise curve method), and the flux spread and wettability of brazing filler metal were analyzed by high temperature wetting furnace. The optimal combination of cadmium-free brazing filler metal and brazing flux was determined for the process model verification of the motor rotor. The test results of the rotor model show that the brazing joint of the end ring and the conducting bar break in the heat affected zone of the conducting bar, and the mechanical properties are qualified. BAg55ZnCuSn and SAXONIA Braze Tec h Paste-Type-FH10 can be used to replace the cadmium-free brazing filler metal of the rotor of the locomotive motor.