载荷对中锰钢耐磨性能的影响

EFFECT OF LOAD ON THE WEAR RESISTANCE OF MEDIUM MANGANESE STEEL

采用UMT TriboLab摩擦磨损仪测试了冶炼工艺流程为电炉-精炼-模铸-粗轧-精轧-控冷-成品的中锰耐磨钢在不同载荷下的摩擦磨损性能,并利用白光干涉仪定量表征了摩擦磨损后样品表面磨痕的形貌,测量了摩擦断面的深度曲线。结果表明:随着试验载荷的增加,摩擦系数呈先升高后降低的变化规律,当载荷达到30 N时,摩擦系数达到最高值0.82;当载荷压力较小时(10 N),随着时间的延长,摩擦系数呈现逐渐变小的趋势;磨痕深度随着载荷的增加而增加,但与载荷增加不呈线性关系,载荷为10~30 N时磨痕深度显著增加,当载荷超过30 N后,磨痕深度的增加值逐渐减小,磨痕深度增加值不随载荷的增加而增加,呈现先升高后降低的现象,说明增加载荷后摩擦磨损机制发生了改变;不同载荷下磨痕的三维形貌分析结果表明,当载荷较小时,其磨损形式为梨沟磨损,其磨损机制为磨粒磨损,当载荷增加时,磨损形式为沟槽磨损,磨损机制转变为黏着磨损。

The friction and wear properties of medium manganese wear-resistant steel with smelting process of electric furnace,refining,die casting,rough rolling,finishing rolling,controlled cooling and finished product under different loads were tested by UMT TriboLab friction and wear instrument,and the morphology of the surface wear marks of the sample after friction and wear was quantitatively characterized by white light interferometer,and the depth curve of the friction section was measured.The results show that with the increase of the test load,the friction coefficient increases first and then decreases,when the load reaches 30 N,the friction coefficient reaches the highest value of 0.82,when the load pressure is small(10 N),the friction coefficient gradually decreases with the extension of time,and the depth of the wear mark increases with the increase of load,but it is not linearly related to the increase of load,and the load is 10~30 N,when the load exceeds,the added value of the wear scar depth gradually decreases,and the added value of the wear scar depth does not increase with the increase of the load,showing the phenomenon of first increasing and then decreasing,indicating that the friction and wear mechanism changes after the load increases.