【摘要】 利用二次回归正交设计法制订钢的碳氮共渗一强韧化复合处理工艺,用自制的直接通电式高温磨损试验机进行试样的热磨损试验,给出了工艺优化的结果。对磨面进行了扫描电镜和电子探针观察分析。结果表明,经复合处理的试样,主要是发生形成层磨损;当工艺参数间取得最佳配合时,磨损抗力最大,为常规处理的2.4倍。更多还原

【Abstract】 Hot wear tests of 5CrNiMo steel specimens, Which were heat treated byusing different carbonitriding-strengthening and toughening processes by quadr-atic othogonal regression design, have been carried out by means of a resistance-heating high temperature wear-testing device of our own design. The optimumcarbonitriding-strengthening and toughening process has been obtained. The wornsurface has been studied by scanning electron microscope and probe analysis. Ithas been shown that the wear mechanism of the specimens heat treated by emplo-ying carbonitriding-strengthening and tougheing processes indicates primarily thewear of the built-up layered areas. The optimum hot wear resistance of the spe-cimens can be gained by using suitable parameters of the new process, furthermore,it is 2.4 times as great as the wear resistance of the specimens treated in conv-entional heat treament regimes.更多还原