(中南工業(yè)大學(xué)粉末冶金國家重點實驗室，長沙 410083)
摘 要: 電鐓發(fā)動機氣門用鐓塊材料要求具有高的高溫硬度，同時保持一定的韌性和可加工性。所研制的W252， W232高鎢合金鐓塊在800℃時，HV值分別為150和169，其使用壽命比Cu-W80鐓塊提高20倍以上。 用于生產(chǎn)排氣門時，其成品率由57.8%提高到98.2%以上。
關(guān)鍵字: 氣門 高溫硬度 高鎢鐓塊 電熱鐓粗
（State Key Laboratory for Powder Metallurgy,Central South University of Technology, Changsha 410083, P. R. China）
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%.
Key words: valve red hardness high tungsten upsetting die blocks material electric upsetting
