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研究了等离子弧淬火工艺参数对45钢表面硬度及摩擦磨损性能的影响。结果表明:喷嘴到工件的距离为8 mm时,可获得较好的淬火效果;在其他淬火参数不变的条件下,随着扫描速度的增加,硬度基本趋于不变;等离子弧淬火使被扫描表面产生了5μm左右的波度,促使相互运动表面产生油楔作用,使边界润滑向混合润滑状态转变,使摩擦因数降低,耐磨性提高。该工艺成本低、操作简单、热效率高,可以实现零件或部件的局部淬火,使材料获得性能优异的表面。
The effect of plasma arc quenching process parameters on the surface hardness and friction and wear properties of 45 steel was studied. The results show that the quenching effect can be obtained when the distance between the nozzle and the workpiece is 8 mm, and the hardness tends to be constant with the increase of scanning speed under the condition of other quenching parameters. The plasma arc quenching Scanning surface has a wave of about 5μm, prompting the wedging effect on the reciprocating surface, changing the boundary lubrication to the mixed lubrication state, reducing the friction coefficient and improving the wear resistance. The process has the advantages of low cost, simple operation, high thermal efficiency, partial quenching of parts or components and excellent material surface performance.