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在SRV-IV型摩擦磨损试验机上分别对喷射成形(SF)和电渣重熔(ESR)高合金工具钢与氮化硅(Si3N4)陶瓷球进行微动干摩擦磨损试验。利用SEM观察了磨斑的表面形貌并分析了其磨损机理。结果表明,与电渣重熔态材料相比,喷射成形态材料的耐磨性提高了47%;当载荷为100 N时,摩擦系数随着速度的增加先增大后减小;材料的磨损量随载荷和摩擦速度增大而增大。在较低载荷下,材料以磨粒磨损为主;随载荷的增加,磨损加剧,以磨粒磨损和粘着磨损为主;在较大载荷下,磨损机制转变为严重的氧化疲劳磨损和磨粒磨损。
On the SRV-IV type friction and wear tester, the fretting dry friction and wear tests of spray-formed (SF) and ESR high alloy tool steel and silicon nitride (Si3N4) ceramic balls were carried out respectively. SEM was used to observe the surface morphology and the wear mechanism was analyzed. The results show that the abrasion resistance of spray-forming material increases by 47% when compared with that of electroslag remelting material. When the load is 100 N, the friction coefficient first increases and then decreases with the increase of velocity. The wear of the material The amount increases as the load and friction speed increase. At lower loads, the material is mainly abrasive wear; with the increase of load, the wear is aggravating, which is mainly abrasive wear and adhesive wear; under the big load, the wear mechanism turns into serious oxidative fatigue wear and abrasion Wear and tear