Mo、Ni、Cu、对高炉衬板用Cr26高铬铸铁铸态组织和性能的影响

　　作者单位：1、沈阳大学机械工程学院2、东北大学材料与冶金学院

　　中文关键字：高炉衬板;高铬铸铁;微观组织;性能

　　英文关键字：Furnace liner; High chromium cast iron; Microstructure; Property

　　中文摘要：采用正交试验法研究了Mo、Ni、Cu对高炉衬板用Cr26高铬铸铁铸态组织和性能的影响，以宏观硬度和冲击韧度为考察指标，对3种合金元素含量进行了优化设计。研究结果表明，单一合金元素对该高铬铸铁硬度和冲击韧度影响以Ni最为显著;而任意两种合金元素的联合作用效果以Mo加Cu最为显著。当合金元素含量为0.6%Mo、0.7%Ni和1.0%Cu时，获得的高铬铸铁综合性能最佳，铸态硬度为55.5 HRC，冲击韧度αk为7.4J·cm-2，铸态显微组织由六角形M7C3初生碳化物，M7C3共晶碳化物和奥氏体组成。

　　英文摘要：

　　The orthogonal experimental method was employed in this work to research the law of effect of Mo, Ni and Cu on the as cast microstructure and mechanical properties of Cr26 high chromium cast iron that used on the furnace liner. based on the data of the impact toughness and macrohardness, the optimization about the composition was carried on. The results show that the most significant effect of any one alloy element on the mechanical properties owns to Ni, and the best combination is Mo and Cu. The best ascast mechanical properties, which are HRC 55.5 and 7.4 J·cm-2 can be obtained when the composition is 0.6 wt.%Mo、0.7 wt.%Ni and 1.0 wt.%Cu, and the corresponding microstructure contains hexagonal M7C3 primary carbides, eutectic M7C3 carbides and austenite.