【摘要】 通过力学性能和耐磨性能测试、金相组织观察和ESEM形貌分析,研究了氮含量对低碳高铬铸铁性能的影响。试验结果表明,随着含氮量的增加,共晶碳化物在结晶过程中方向性生长减缓,形状趋于粒状;二次碳化物数量增加,形貌和尺寸也发生变化。随着含氮量的增加,低碳高铬铸铁的硬度增加,冲击韧度下降,滑动式和滚筒式磨损率下降。更多还原

【Abstract】 The effects of nitrogen on the properties of low carbon high chromium cast iron were studied by mechanical property and wear resistance test,and metallograph analysis using OM and ESEM.The experiments showed that the addition of nitrogen into the cast iron slows the directive growth of the eutectic carbide during crystallization,which makes them more nodular-like,increases the amount of secondary carbides and changes their size and shape.Also,the addition of nitrogen increases the hardness and decreases the impact toughness,increases the sliding and rolling wear resistance.更多还原