熔渗铜锡316L不锈钢的制备与性能

利用熔渗Cu90Sn10工艺制备粉末316不锈钢，研究了压制压力、熔渗温度对材料性能和组织的影响。结果表明：利用熔渗法可制备高致密的316L不锈钢，相对密度可达98％以上；基体骨架孔隙率应保证在189／6～229／5左右。熔渗后316L烧结不锈钢的硬度从49HRB提高至88HRB，且塑性也有所提高。同时，耐腐蚀性能也有很大提高，其腐蚀电位为-212mV，接近致密316L不锈钢。随着骨架密度的提高，熔渗制品密度基本不变，但硬度明显下降。应防止熔渗温度过高而使晶粒过分长大。

Cu-Sn Alloy Infiltrated 316L Stainless Steel Composites

A new method to produce P/M 316L stainless steel by infiltrating Cu90Sn10 alloy was studied. The effect of different pressures and infiltrating temperatures on the properties and structure of the material was evaluated. The results show that it is possible to produce 316L stainless steel by using the infiltration technology. The relative density reached above 98% of the theoretical value, provided that the skeleton' s porosity was controlled at 18%-22%. After infiltration, the hardness of the 316L stainless steel increased from 49 HRB to 88 HRB. Also, the corrosion resistance increased. The corrosion potential reached-212 mV, close to the level of as cast 316L stainless steel. The hardness of infiltrated composite of the same density decreased with increase in initial skeleton density. It was necessary to prevent the egregious growing of the crystal while the infiltrating temperature was too high.