耐热球墨铸铁的研制及其组织性能的试验研究
Development of Heat Resistance Ductile Iron and Study of Micro-Structure and Performance
李洪波，葛洪亮，李海涛，吴贵福，李春洁
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作者单位：佳木斯大学
中文关键字：铬合金化； 球墨铸铁；耐热性能；力学性能
英文关键字：
中文摘要：摘要：经过化学成分的设定，采用铬合金化的方式，经熔炼浇注，研制了一种低铬耐热球墨铸铁材料。通过显微组织观察，力学性能试验，加工性能试验，高温氧化性试验和生长试验研究了所研制耐热球墨铸铁材料的组织和性能。试验结果表明，所研制的耐热球铁的显微组织为珠光体+少量铁素体的基体上分布着球状石墨，其孕育球化效果较好；不同铬成分试样的力学性能，加工性能以及高温耐热性能都较好，但以铬含量为1.6%的组分的性能最好。可见，铬合金化球铁是一种综合性能较优异的材料，可在800℃下长期使用。
英文摘要：Abstract: After the setting of chemical composition, by way of alloying, after melting and pouring, a sort of low-chromium heat-resistant ductile iron material were developed. Through the observation of microstructure, testing of mechanical properties and process performance, high temperature oxidation test and volume growth test, the microstructure and properties of heat resistance ductile iron of low chromium was studied. The results show that microstructure of the developed heat-resistant ductile iron is spherical graphite distributed regularly on matrix of pearlite and a small amount of ferrite, effect of nodularity is better; mechanical properties, processing performance and high-temperature heat resistance of samples of different chrome composition are preferable, but 1.6% of chromium component possess the best performance. Obviously, chrome alloy ductile iron is a kind of comprehensive and excellent material that can be long-term used at 800 ℃.