Transactions of Materials and Heat Treatment

Title：Defect analysis and improvement on copper alloy forgings for urban rail transit contact network

Authors： Ge Zhirui Yu Zhaoguo Lu Jia Niu Zhisen

Unit： China Railway Construction Electrification Bureau Group Rail Transportation Equipment Co. Ltd.

KeyWords： contact network QAl9-4 copper alloy connecting sleeve failure analysis crimping stress

ClassificationCode：U225.4

year,vol(issue):pagenumber：2020,45(12):207-211

Abstract：

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.

Funds：

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

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