铸造碳化铬增强锰白铜基复合材料磨料磨损机理

Abrasion wear mechanism of cast chromium carbide reinforced Mn-Co-Ni alloy matrix composite

采用真空熔铸法制备铸造碳化铬增强锰白铜基复合材料,对铸造锰白铜时效处理后,在ML10型磨损试验机上选用不同粒度的SiC砂纸和不同载荷进行磨损试验,研究了材料的二体磨料磨损机理。结果表明:铸造碳化铬增强锰白铜基复合材料的耐磨性随着载荷和磨料粒度的增加而降低;在相同试验条件下,耐磨性随着碳化铬颗粒体积分数和碳化铬颗粒尺寸的增大而提高;碳化铬颗粒尺寸相对较大时,其磨损以局部断裂为主;碳化铬颗粒尺寸相对较小时,碳化铬颗粒的磨损主要以整体脱落形式进行。

The vacuum infiltrating casting method was adopted to produce the Mn-Co-Ni alloy matrix composite. After the aging treatment, the wear test was carried out on the ML10 model wear tester. The abrasion wear mechanism of cast chromium carbide reinforced Mn-Co-Ni alloy matrix composite was studied. The results show that： with the increasing of loading and abrasive grain size, the wear resistance of the material opposite drops; with the increasing of volume ratio or grain size of cast chromium carbide respectively, the wear resistance of the material opposite is improved; when the cast chromium carbide size is larger, the wear of cast chromium carbide is mainly in the form of localized fracturing; when the size is smaller, the wear of cast chromium carbide is mainly in the form of departing from the matrix. 5 figs, 6 refs.