随流孕育处理对WD615汽缸盖组织和断面均匀性的影响.pdfVIP

学兔兔 2010~第2期 铸 造 设 备 与 工 艺 2010年 4月 F0UNDRY E0UIPMENT AND TECHN0L0GY ． 201O №2 · 铸造工艺· 随流孕育处理对WD6 15汽缸盖组织 和断面均匀性的影响 许景峰 ，一，杨 华 ，田普昌。，张敏之 ，张 杰 ，谢瑞财 (1．山东大学材料液固结构演变与加工教育部重点实验室，山东济南 250061； 2．潍柴动力股份有限公司，山东潍坊 261041) 摘要：利用金相显微镜、布氏硬度计分析了随流孕育处理对WD615汽缸盖金相组织和断面敏感性的影响。 结果表明，汽缸盖采用O．10％的si—zr随流孕育处理，能够消除薄壁处的D型石墨和碳化物，获得均匀分布的A 型片状石墨．并改善了其断面均匀性。用si～zr孕育剂进行随流孕育处理在WD615汽缸盖生产中取得了良好的 效果。 关键词：随流孕育；石墨：断面均匀性；汽缸盖 中图分类号：TG243 文献标识码：A 文章编号：1674—6694(2010)02—0034—02 Innuence of Instant Stream Inoeulation on Microstructure and Section Sensitivity Of wD615 Cylinder Cap XUJing-feng ，YANG Hua ，TIAN Pu-chang2,ZHANG Min-zhi2，ZHANG Jie2,XIE Rui--caF (1．Key Laboratoryfor Liquid—Solid Structural Evolution and Processing ofM~edals， f ofEducation，Shandong Unwe~ity， Jinan Shandong 250061，China；2．Weichai Power Co．，Ltd．We~ang Shandong 261041，China) Abstract：The effects of instant stream inoculation process on the microstmcture and section sensitivity of WD615 Cylinder Cap were investigated by optical microscopy and Brinell hardness tester．The results showed that graphite of type D and carbide in the thin wall of the Cylinder Cap were eliminated and type A flake shape graphite evenly distributes on the matrix with instant stream inoculation of 0．10％ Si—Zr inoculant．It also impmves section sensitivity and microstructure uniformity with instant stream inoculation process．Good result has been obtained by applying instant stream inoculation process to production of WD615 Cylinder Cap． Key words：instant steam inoculation，graphite，section sensitivity，cylinder Cap