(1.哈爾濱工業(yè)大學(xué)433信箱，哈爾濱150001；
2.佳木斯工學(xué)院二系，佳木斯154007)
摘 要: 用正交試驗法研究了Ni-Ti-Nb合金在小同切削速度、進給量和切削深度下的機械加工性能。結(jié)果表明:切削速度、進給量、切削深度對切削力和平均切削溫度的影響基本上與45鋼相同；切削時宜用K 類硬質(zhì)合金刀具最佳切削速度為40m/min。
關(guān)鍵字: Ni-Ti-Nb合金 機械加工 高溫拉伸行為
（Central South University of Technology,Changsha 410083）
Abstract:A Thermal forging for a series of Al-Si alloy powder preforms was investigated, and the mechanical properties and wear resistance of the alloys were presented. The results showed that the forging billet might reach 99 per cent theoretical density when silicon content was not beyond 30%. Primary silicon crystal had fine and homogeneous distribution without needle or large plate shape. Tensile strength of Al-10Si-2Cu-1Mg and Al-15Si-2Cu-1Mg were 284~324MPa and 304~333MPa, hardness (HB) 124~128 and 122~124, respectively, higher than relative alloys without Cu and Mg.
Key words: Al-Si powder thermal powder forging mechanical property wear resistance
