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...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。展开更多
For austenitic octahedral segregation structure units, their pure mathematics statistic distribu!ive probability is calculated by the empirical electron theory （EET） of solids and molecules and K-B formula. The prac...For austenitic octahedral segregation structure units, their pure mathematics statistic distribu!ive probability is calculated by the empirical electron theory （EET） of solids and molecules and K-B formula. The practical distributive probability can be obtained only if the statistic distribution of austenitic octahedral segregation structure units and the interaction of the alloying elements in steel are considered. Based on 8 groups of experimental data of original steels, three empirical formulas revealing relationships between material macromechanics factor （Sm） and tensile strength （ab）, or impact energy （AK）, or hardness （HRC） of multi-component medium-low-alloy steels were established, respectively. Through the three empirical formulas, new supersaturated carburizing steel has been successfully designed and developed. The other 2 groups of the original experimental steels are used as the standard steel for testing the percentage error of the new steel. The results show that the calculated values are well consistent with those of measured ones and the new supersaturated carburized steel can meet the requirements of the die assembly of cold-drawn seamless stainless steel tube of Taiyuan Iron ＆ Steel （Group） Company LTD.展开更多
文摘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。
基金the Science and Technology Foundation of Retuned Students Studying Abroad of Shanxi Province of China(No. 1995-26)
文摘For austenitic octahedral segregation structure units, their pure mathematics statistic distribu!ive probability is calculated by the empirical electron theory （EET） of solids and molecules and K-B formula. The practical distributive probability can be obtained only if the statistic distribution of austenitic octahedral segregation structure units and the interaction of the alloying elements in steel are considered. Based on 8 groups of experimental data of original steels, three empirical formulas revealing relationships between material macromechanics factor （Sm） and tensile strength （ab）, or impact energy （AK）, or hardness （HRC） of multi-component medium-low-alloy steels were established, respectively. Through the three empirical formulas, new supersaturated carburizing steel has been successfully designed and developed. The other 2 groups of the original experimental steels are used as the standard steel for testing the percentage error of the new steel. The results show that the calculated values are well consistent with those of measured ones and the new supersaturated carburized steel can meet the requirements of the die assembly of cold-drawn seamless stainless steel tube of Taiyuan Iron ＆ Steel （Group） Company LTD.
