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研究了挤压铸造法制备的Al2O3陶瓷颗粒增强20Cr25Ni20耐热钢基复合材料在500℃下的高温磨损性能,并和基体材料20Cr25Ni20及其他几种常用的辊环材料进行对比。结果表明,在比压为7.95MPa时,Al2O3p/20Cr25Ni20复合材料高温耐磨性是基体材料20Cr25Ni20的3.4倍,比Cr16高铬铸铁提高了46%,YG10硬质合金耐磨性最好,是复合材料的6.5倍。基体材料高温磨损后发生塑性流动,切削严重,复合材料中氧化铝陶瓷颗粒作为高温耐磨相发挥出良好的耐磨作用。
The Al2O3 ceramic particles prepared by squeeze casting method were used to enhance the high temperature wear resistance of 20Cr25Ni20 heat-resistant steel matrix composites at 500 ℃ and compared with 20Cr25Ni20 base material and several other commonly used roll-ring materials. The results show that the wear resistance of Al2O3p / 20Cr25Ni20 composite is 3.4 times higher than that of 20Cr25Ni20 and 46% higher than that of Cr16 high chromium cast iron at the specific pressure of 7.95MPa. YG10 cemented carbide has the best wear resistance, 6.5 times the material. The base material undergoes plastic flow after wear at high temperature and severely cuts. The alumina ceramic particles in the composite material exert a good abrasion resistance as a high-temperature wear-resistant phase.