氮对高铬铸铁组织及碳化物形貌的影响  

Effects of Nitrogen on Microstructure and Carbide Morphology of High Chromium Cast Iron

作　　者：刘春霆[1] 张胤[1] 张洁[1] 任文强[1] 牛芳[1] 

机构地区：[1]内蒙古科技大学材料与冶金学院,内蒙古包头014010

出　　处：《铸造工程》2012年第4期5-7,共3页Foundry Engineering

摘　　要：加入氮元素可改善高铬铸铁的力学性能。为了解氮对高铬铸铁的影响机制，通过Factsage和Imagepro plus对加氮的高铬铸铁进行相图模拟和碳化物形貌分析。研究发现，加氮后高铬铸件的冲击韧度和硬度都会受到影响。当加入质量分数0．07％的氮，冲击韧度达到6．4J／cm2；加氮量为O．4％时，硬度达到64．5HRC。The mechanical properties of high chromium cast iron were improved by adding nitrogen. In order to understand the effects of nitrogen on high chromium cast iron, the phase diagram was simulated by Factsage, and the carbide morphology was analyzed by Imagepro plus. The results show that the impact toughness and hardness of high chromium cast iron are affected by nitrogen. When adding 0.07% of nitrogen, the impact toughness is 6.4 J/cm2. The hardness is to 64.5HRC after 0.4% of nitrogen.

关 键 词：高铬铸铁 氮化铬 碳化物 冲击韧度 硬度 

分 类 号：TG143.9[一般工业技术—材料科学与工程]