(1. 浙江理工大學 機械工程系, 杭州 310018；
2. 浙江省冶金研究院, 杭州 310013)
摘 要: 分別采用熔滲法和混粉壓燒法制備技術生產(chǎn)出2種銅鉻觸頭材料, 其含銅量均為48%~52%, 余量為鉻。 利用銷盤式摩擦磨損實驗機對這2種技術制備的銅鉻材料的摩擦磨損性能進行了比較研究。 結果表明： 在本實驗條件下, 同一載荷穩(wěn)定狀態(tài)時2種銅鉻觸頭材料的摩擦系數(shù)基本相當, 約在0.32~0.36之間； 隨著載荷的增加其摩擦系數(shù)略有增加； 磨損質量損失隨載荷的增加而增大, 低載荷時, 混粉法制備的銅鉻合金具有較低的磨損率, 高載荷時熔滲法具有較低的磨損率； 低載荷時2種銅鉻合金的磨損破壞機制都以粘著和微切削機理為主, 高載荷時以磨損表面的片狀或顆粒簇剝落為主。
關鍵字: 銅鉻觸頭材料； 摩擦； 磨損； 熔滲法； 混粉壓燒法
CuCr contact materials
（1 Department of Mechanical Engineering,
Zhejiang Sci-Tech University, Hangzhou 310018, China;
2. Zhejiang Metallurgical Research Institute, Hangzhou 310013, China）
Abstract: Two kinds of CuCr contact materials have been made by powder metallurgy sintering process and infiltration process with 48%-52% copper. Their friction and wear properties were studied with help of a pin-disc type wear apparatus. The experiment results showed that their friction coefficients in stable were almost same at the same load, approximately between 0.32 and 0.36. Their friction coefficients slightly increase with wear load up. The load adding will augment their wear mass loss. The mass loss of the CuCr alloy made by powder metallurgy process is relatively low at 20 N load and the loss of that made by infiltration process is relatively low at 40 N load. SEM analysis also shows that the adhesive and microcutting wear are the dominant mechanisms in low loads and the thin feet or particle cluster spalling is the dominant mechanism in high loads.
Key words: CuCr contact material; friction; wear; infiltration process; compacting process
