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为了搞清煤对矿山机器的磨损作用及磨损机制,用不同碳含量的钢在改装的M-200磨损试验机上进行了原煤、浮选煤和煤中加不同石英砂含量的三体磨料磨损试验。结果表明:当煤和材料的硬度比H_a/H_m大于0.64时,造成材料的硬磨料磨损,但煤的磨料磨损机制同其他磨料不同。煤粒的磨料磨损特性是在其磨损过程中发生某些弹塑性变形,使材料以犁沟—塑变—最终造成材料的断裂而磨失。其过程类似于塑性金属的一般断裂机理,而直接的显微切削现象甚少。煤中的石英含量增加使材料的磨损率增大,磨损率和煤中的自由石英含量呈线性比例关系。
In order to find out the effect of wear and tear of coal on mining machines and wear mechanisms, three-body abrasive wear tests of raw coal, flotation coal and coal with different quartz sand content were carried out on the modified M-200 wear tester with different carbon content steel . The results show that when the hardness ratio H_a / H_m of coal and material is greater than 0.64, the abrasive wear of the material is caused, but the abrasive wear mechanism of coal is different from that of other abrasives. Abrasive wear characteristics of coal particles in the process of wear and tear occurs some of the elastic deformation, the material to furrow - plastic deformation - the ultimate cause of material fracture and loss. The process is similar to the general fracture mechanism of plastic metal, and the direct micro-cutting phenomenon rarely. Increasing the quartz content in the coal increases the wear rate of the material and the wear rate is linearly proportional to the free quartz content in the coal.