粉末冶金渗铜钢的摩擦磨损性能

Friction and wear performance of copper-infiltrated powder metallurgy steel

通过压制、预烧和熔渗,制备1种液压零件用粉末冶金渗铜钢。用UMT 3型摩擦磨损实验机评价该材料在边界润滑条件下的耐磨性,研究基体密度对渗铜钢摩擦磨损性能的影响,并与目前常用的耐磨合金进行摩擦磨损性能对比。结果表明:在边界润滑条件下,渗铜量相同,基体材料密度分别为6.40、6.60、6.80 g/cm3的粉末冶金渗铜钢摩擦副的摩擦因数相差不大,4 h的质量磨损量分别为1.70、1.50和3.10 mg;而传统耐磨合金中硬度较低的HMn58 2铜合金磨损量为24.10 mg,磨损较快。

A kind of hydraulic copper-infiltrated powder metallurgy （PM） steel was obtained through the process of pressing, sintering and infiltrating. The UMT-3 tribometer was used to evaluate the friction and wear performance under boundary lubrication conditions. The performances of traditional wear-resistant alloys were also studied as a comparison. The results show that, the hydraulic copper infiltrated PM steel materials with different matrix densities of 6.40, 6.60 and 6.80 g/cm3 infiltrated respectively with the same amount of copper have almost the same friction coefficients, the wear mass loss are 1.70, 1.50 and 3.10 mg respectively after 4 h wear, while, the traditional wear-resistant copper alloy HMn58-2 with lower hardness has the wear mass loss of 24.10 mg.