研究了高硅贝氏体铸钢变质前后的高应力冲击磨损性能和失效机制。试验结果表明,变质处理后贝氏体铸钢的磨损性能明显提高,其磨损量约是变质前的1/2。这是因为稀土/钛变质剂能有效地改善铸钢的晶粒和组织粗大、成分偏析造成的组织不均匀等问题,使铸钢具有优良的耐磨性能。 The high stress impact and wear properties and failure mechanisms of high silicon bainitic cast steel before and after metamorphism were studied. The test results show that the wear properties of the bainitic cast steel after modification are obviously improved, and the wear loss is about 1/2 before the deterioration. This is because the rare earth / titanium modifier can effectively improve the cast steel grain and coarse structure, composition segregation caused by uneven tissue problems, so that steel has excellent wear resistance.