铸造技术2017，Vol.38Issue(11)：2582-2585,4.DOI:10.16410/j.issn1000-8365.2017.11.006
石墨形态及金相组织对蠕墨铸铁力学性能的影响
Effects of Graphite Morphology and Metallographic Structure on Mechanical Properties of Vermicular Graphite Cast Iron
摘要
Abstract
Five kinds of vermicular graphite cast iron samples with similar chemical composition but different rate of vermicular cast iron and metallographic structure were prepared.By the means of metallographic,tensile and hardness tests,the rate of vermicular cast iron,graphite morphology,metallographic structure,tensile strength and Brinell hardness of vermicular graphite cast iron were determined.The combined effects of rate of vermicular cast iron,graphite morphology and metallographic structure on mechanical properties such as tensile strength and hardness of vermicular graphite cast iron were investigated at the condition of ≥ 80％ rate of vermicular cast iron.The results show that at the condition of ≥ 80％ rate of vermicular cast iron,the change of the rate of vermicular cast iron can't remarkable affect the mechanical properties such as tensile strength and hardness of vermicular graphite cast iron,and the decrease of the length-width ratio of graphite can effectively improve the tensile strength and hardness of vermicular graphite cast iron.When the rate of vermicular cast iron are ≥ 80％ and the length-width ratio of graphite is dropped in the scale of 5～9,the pearlite volume fraction plays the most important roles on the tensile strength and hardness of vermicular graphite cast iron,and the higher the pearlite volume traction,the better the mechanical properties such as tensile strength and hardness of vermicular graphite cast iron.关键词
蠕墨铸铁/力学性能/金相组织/石墨形态/蠕化率Key words
vermicular graphite cast iron/mechanical properties/metallographic structure/graphite morphology/vermicularity分类
矿业与冶金引用本文复制引用
林勇传,王凯,黄健友,韦珏宇..石墨形态及金相组织对蠕墨铸铁力学性能的影响[J].铸造技术,2017,38(11):2582-2585,4.基金项目
广西玉林市-广西大学市校科技合作资助项目(玉市校科合201402801) （玉市校科合201402801）
