摘要
为生产高质量、高性能要求的不锈钢活塞顶，对其化学成分、铸造工艺及热处理工艺进行了优化分析，结合酯硬化水玻璃砂工艺出现的缺陷问题提出了防止措施，为批量生产合格铸件奠定了基础。实际生产经验表明，气孔是生产过程中的主要缺陷，通过减少发气源、增强排气及控制浇注工艺等措施取得了较好效果；在ZG20Crl3基础上添加Ni、Mo合金元素，并采用950℃保温2～3h油淬、650℃保温2～3hlg／火的调质处理工艺，满足了零件的性能要求。
In order to produce high quality and high performance stainless steel piston crown castings, the chemical composition, casting process and heat treatment process were optimized and analyzed, and the prevention measurements were presented to the defects of ester cured water glass sand process for the mass production of qualified casting. The actual production experience shows that the major defect in the production process is blowhole, which can be eliminated by reducing the source of gas, enhancing exhaust and controlling the casting process. The Ni and Mo alloying elements were added to ZG20Crl3, and the heat treatment process with oil quenching after holding 2-3 h at 950 ℃ and tempering 2-3 h at 650 ℃ is taken to meet the performance requirements of castings.
出处
《铸造工程》
2014年第2期9-12,共4页
Foundry Engineering
关键词
活塞顶
铸造工艺
气孔
变形
piston crown
casting process
blowhole
detbrmation
