高钨镦块材料的组织与性能

来源期刊：中国有色金属学报1999年第2期

论文作者：梁容海 汤金芝 刘红卫

文章页码：263 - 267

关键词：气门 高温硬度 高钨镦块 电热镦粗

Key words：valve; red hardness; high tungsten upsetting die blocks material; electric upsetting

摘    要：电镦发动机气门用镦块材料要求具有高的高温硬度，同时保持一定的韧性和可加工性。所研制的W₂₅₂， W₂₃₂高钨合金镦块在800℃时，HV值分别为150和169，其使用寿命比Cu-W₈₀镦块提高20倍以上。 用于生产排气门时，其成品率由57.8%提高到98.2%以上。

Abstract: Upsetting die blocks materials used for fabricating engine valve should possess excellent red hardness, and certain toughness and good processing ability. The service life of upsetting die block made of W₂₅₂ or W₂₃₂ high tung sten alloy studied is over 20 times more than that made from Cu-W₈₀ alloy by long-run confirmation tests. Especially in fabrication of exhaust valve, the finished product ratio has increased to 98.2% from previous 57.8%.