发明授权
- 专利标题: Process for making railroad car truck wear plates
- 专利标题(中): 制造铁路车载卡车板的工艺
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申请号: US190290申请日: 1994-02-02
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公开(公告)号: US5518557A公开(公告)日: 1996-05-21
- 发明人: Richard L. Jones , William K. Doyle , Gerald L. Farrell , Frank R. Hueske
- 申请人: Richard L. Jones , William K. Doyle , Gerald L. Farrell , Frank R. Hueske
- 申请人地址: IL Park Ridge
- 专利权人: Standard Car Truck Company
- 当前专利权人: Standard Car Truck Company
- 当前专利权人地址: IL Park Ridge
- 主分类号: C21D1/18
- IPC分类号: C21D1/18 ; C21D1/673 ; C21D7/06 ; C21D8/02 ; C21D8/04
摘要:
A process for making steel wear plates for use as railroad car truck side frame/bolster damping components utilizes the sequential steps of heating, pressing, quenching and then tempering. The heating process includes bringing the wear plate to a temperature of approximately 1750.degree. F. so that the plate is essentially 100 percent austenite. Generally uniform pressure is applied to the plate while heated to bring the plate to a desired flatness. Quenching fluid is thereafter applied to the flattened plate, while maintaining pressure thereon, to bring the plate to a predetermined brinnell hardness, a predetermined temperature, and a metallurgical characteristic of at least 90 percent martensite. The plate is thereafter tempered at a temperature of from 910.degree.-940.degree. F. for a period of time sufficient to bring the plate to a brinnell hardness less than the hardness after quenching.
公开/授权文献
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