WD615气缸体铸件材料性能的改善  

Material Properties Improvement of WD615 Cylinder Block

作　　者：郝延宏 张敏之 张小龙 

机构地区：[1]潍柴动力股份有限公司铸锻厂,山东潍坊261001

出　　处：《现代铸铁》2005年第6期26-29,共4页Modern Cast Iron

摘　　要：WD615气缸体铸件曾发生化学成分不稳定、铸件本体组织粗大、铁素体含量偏高、硬度偏低等质量问题,为此,采取了如下措施:1)加强熔炼用材料的质量控制;2)提高冲天炉的熔炼质量;3)改进熔炼工艺(调整C、Si量,采用Cu-Cr-Sn合金化;降低浇注温度);4)改进孕育工艺;5)采用炉前快速检测技术;6)加强铸件本体质量检测。结果表明,缸体铸件的化学成分、金相组织及力学性能均满足技术要求。Unstable chemical composition, open structure, too higher ferrite content and lower hardness of casting itself had been the quality problems of WD615 cylinder block. Therefore, following measures were adopted： a） strengthening quality control of melting charges; b）enhancing quality of cupola melting; c） improving melting process including adjusting C and Si contents, alloying with Cu-Cr-Sn and decreasing pouring temperature; d） improving inoculation process; e） adopting on-spot fast checking-testing techniques; f）tightening quality inspection of castings themselves. The results showed that the composition, microstructure and mechanical properties of the blocks have overall met the technical requirements.

关 键 词：材料性能 化学成分 熔炼控制 

分 类 号：TG251[金属学及工艺—铸造]