论文部分内容阅读
在NM400耐磨钢中添加了不同数量的V和Ti,用SEM-EDS对试验钢中第二相的种类、数量和钢的显微组织进行了检测,用万能磨损试验机对钢种的耐磨性进行了测量。结果表明,V、Ti的加入,不仅析出了V、Ti的碳化物,也促进了Si的氧化物析出,尺寸较大的第二相主要为Si的氧化物,V、Ti的碳化物较为细小;耐磨试验表明V、Ti加入量都分别为0.1%、0.2%和0.3%时,磨损率分别为0.0115 g/cm~2、0.0082 g/cm~2和0.0106 g/cm~2。V、Ti加入量为0.1%时,磨损试验后试样表面犁沟较多,出现一些较深的犁沟;加入量为0.2%时,犁沟较少且较浅;加入量为0.3%时犁沟既深又多,部分区域出现脱落现象。综合分析以V、Ti加入量为0.2%时试验钢的耐磨性最佳。
In the NM400 wear-resistant steel added a different amount of V and Ti, SEM-EDS of the second phase of the test steel type, quantity and the microstructure of the steel were tested with a universal wear tester on the steel resistance Abrasiveness was measured. The results show that the addition of V and Ti not only precipitates the carbides of V and Ti, but also promotes the precipitation of Si oxides. The second phase with larger size is mainly the oxide of Si, the carbides of V and Ti are finer The wear tests showed that the wear rates were 0.0115 g / cm ~ 2,0.0082 g / cm ~ 2 and 0.0106 g / cm ~ 2 when the additions of V and Ti were 0.1%, 0.2% and 0.3% respectively. When the amount of V and Ti is 0.1%, there are more furrows on the surface of the specimen after the wear test, and some deep furrows appear. When the adding amount is 0.2%, the furrows are less and shallower; when the adding amount is 0.3% Furrows deep and many, some areas appear shedding phenomenon. Comprehensive analysis to V, Ti addition of 0.2% when the test steel wear resistance best.