铁路货车用灰铸铁活塞铸造工艺.pdf

学兔兔 Jun．2012 VOI．61 NO．6 ‘- ^ ■ ● J■ ● ■ ■ _■， ● ；经验交流 } 、n■ ■-■^，’ ■ ●-_^，’n■、 ■、， 铁路货车用灰铸铁活塞的铸造工艺 邱力彬 ，石作胜。 (1．齐齐哈尔车城铸造公司，黑龙江齐齐哈尔161002；2．沈阳工业安装工程股份有限公司，辽宁沈阳110178) 摘要：灰铸铁活塞铸件的热稳定性和硬度均匀性较差，降低了活塞的抗腐蚀性和耐磨性。为了提高灰铸铁活塞在铸态下的 性能，满足使用要求，分别从原材料和化学成分的选择、造型工艺和浇注系统设计、熔炼、孕育等方面进行优化和有效控 制，成功生产了在铸态下满足技术要求的灰铸铁活塞铸件。铸件合格率在95％以上，已广泛用于铁路货车的制动缸上。 关键词：灰铸铁活塞；原材料；化学成分；熔炼；复合孕育 中图分类号：TG25 1 文献标识码：B 文章编号：1001—4977(2012)06—0676—03 Foundry Process of Gray Cast I ron Piston for Wagon QIU Li—bin ，SHI Zuo-sheng2 (1．Qiqihar Checheng Casting Company，Qiqihar 1 6 1 002，Heilongjiang，China； 2．Shenyang Industrial Installation Engineering Corporation，Shenyang 1 10178，Liaoning，China) Abstract：The poor heat stability and uniformity of hardness of gray cast iron piston casting decreased its corrosion resistance and abrasive resistance．In order to improve the perform ance of ay cast iron piston in as—cast condition and sarisfy operating requirements，choosing raw material and chemical composition， molding technology and gating system designing，smelting，inoculation and other aspects are optimized and effectively controlled．The gray cast iron piston castings in as—cast condition satisfying technical requirements are successfully produced．The yield of the castings is above 95％．The castings have been widely used in wagon brake cylinder． Key words：gray cast iron piston；raw material；chemical composition；smelting；compound inoculation 活塞是货车制动缸用密封保压件，要求具有良好