锻压技术

城市轨道交通接触网铜合金锻件缺陷分析及改良

英文标题：Defect analysis and improvement on copper alloy forgings for urban rail transit contact network

作者：葛志锐余兆国陆佳牛致森

分类号：U225.4

出版年,卷(期):页码：2020,45(12):207-211

摘要：

针对城市轨道交通网常用的QAl9-4铜合金锻件，从宏观、微观、能谱、金相、硬度等5个角度分析了锻件的失效情况，结合材料特点、工艺特性及服役环境提出可行性改进方案，通过热处理工艺优化、锻压模具优化以及压接应力值的优化提升了产品性能，并进行了相关试验以及服役效果验证，取得了显著效果，消除了QAl9-4铜合金锻件的质量隐患，为城市轨道交通接触网的安全运行提供了良好的质量和安全保障。

For the QAl9-4 copper alloy forgings for urban rail network, the failure situation of forgings was analyzed from five aspects, namely, macroscopic, microscopic, energy spectrum, metallographic and hardness, and combining with material characteristics, process characteristics and service environment, a feasible improvement plan was proposed. Furthermore, the product performance was improved by the optimization of heat treatment process, forging die and crimping stress value, and the related tests and service effect verification were conducted to achieve the significant results and eliminate the hidden quality hazards of QAl9-4 copper alloy forgings, which provides good quality and safety guarantee for the safe operation of urban rail transit contact network.

基金项目：

葛志锐（1984-），男，学士，工程师 E-mail：657766702@qqcom

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