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采用销盘式摩擦磨损试验机对干摩擦条件下超声流变压铸成形Al-17Si-2Fe-2Cu-1Ni-0.8Mn合金的磨损性能进行了研究.结果表明:在相同载荷下,超声流变压铸试样的磨损率比液态压铸试样小.长板条状δ-Al4(Fe,Mn)Si2相的细化以及气孔的消除使得合金的耐磨性能得以提高.当载荷从50 N增至100 N时,液态压铸和超声流变压铸试样的磨损率增幅均较大;当载荷从100 N增至150 N时,磨损率增幅变缓;当载荷从150 N增至200 N时,磨损率增幅又变大.合金在低载荷(50 N)时,磨损机理以氧化磨损为主;当载荷介于100~150 N之间时,以氧化磨损和剥层磨损相结合的方式为主;在高载荷(200 N)时,以剥层磨损为主.
The wear properties of Al-17Si-2Fe-2Cu-1Ni-0.8Mn alloy by rheo-rheological die-casting under dry friction condition were studied by using pin-plate friction and wear tester.The results show that under the same load, The wear rate of the sample is smaller than that of the liquid die-cast sample.The refinement of long-strip δ-Al4 (Fe, Mn) Si2 phase and the elimination of pores can improve the wear resistance of the alloy.When the load increases from 50 N to 100 N, the wear rate of liquid die casting and ultrasonic rheo-diecasting increases greatly. When the load increases from 100 N to 150 N, the wear rate increases slowly. When the load increases from 150 N to 200 N, the wear rate And the increase and enlargement.At the low load (50 N), the wear mechanism of the alloy is mainly oxidative wear, when the load is between 100-150 N, the combination of oxidation wear and peeling wear is the main way. At high loads (200 N), wear is dominated by delamination.