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钼、钒复合强化灰铸铁组织和性能研究

Research on Microstructure and Properties of Molybdenum and Vanadium Composite Reinforced Gray Cast Iron

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【作者】 裴慧雯李莉娟李仁兴陈湘茹翟启杰

【Author】 PEI Hui-wen;LI Li-juan;LI Ren-xing;CHEN Xiang-ru;ZHAI Qi-jie;Center for Advanced Solidification Technology, School of Materials Science and Engineering, Shanghai University;

【通讯作者】 陈湘茹;

【机构】 上海大学材料科学与工程学院先进凝固技术中心

【摘要】 为满足汽车发动机缸体高性能要求,在灰铸铁中添加Mo和V,利用OM、SEM、EPMA等手段分析其组织变化,进行力学性能和导热性能的检测。结果表明:含0.5wt.%Mo和0.3wt.%V的灰铸铁试样,相比于空白试样,共晶反应后温度降低,石墨形态更弯曲细小;基体组织珠光体的片层间距细化,共晶团数量增多;抗拉强度提高了24%,布氏硬度增加了15%左右。钒元素含量增加至0.6 wt.%,抗拉强度最高达到402 MPa。Mo、V复合强化后的灰铸铁,不但综合力学性能得到显著提升,同时兼具良好的导热性能。

【Abstract】 In order to meet the high performance requirements of automobile engine cylinder block, Mo and V were added into gray cast iron. The microstructure changes were analyzed by OM, SEM and EPMA. The results show that the gray cast iron sample containing 0.5wt.% Mo and 0.3wt.% V, compared with the blank sample,the temperature of the eutectic reaction is lowered, and the graphite morphology is more curved and finer; the matrix structure is lamellar pearlite. The spacing is refined, and the number of eutectic clusters is increased.The tensile strength is increased by about 24%, and the Brinell hardness is increased by about 15%. The vanadium content is increased to 0.6wt.%, and the tensile strength is up to 402 MPa. The gray cast iron strengthened by Mo and V compound not only has a significant improvement in comprehensive mechanical properties, but also has good thermal conductivity.

【基金】 十三五国家重点研发计划(No.2020YFB2008403);国家自然科学基金(No.52071195)
  • 【文献出处】 铸造 ,Foundry , 编辑部邮箱 ,2022年07期
  • 【分类号】TG143;U465
  • 【下载频次】89
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