铁路货车用灰铸铁活塞铸造工艺.pdf

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铁路货车用灰铸铁活塞的铸造工艺
邱力彬,石作胜。
(,黑龙江齐齐哈尔 161002;,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
FoundryProcess ofGray Castron PistonI Wagonfor
QIU Li—bin ,SHIQIU Li—bin Zuo-sheng2
( Checheng pany,Qiqihar 1 6 1 002,Heilongjiang,China; Company,Qiqihar1 ( 6 1
Industrial Installation Engineering Corporation, Installation 10178,Liaoning,China)Industrial 1
Abstract:Theand pooruniformity ofheat hardnessstability decreasedpistoncastingof irongraycast its
corrosion resistance andabrasive orderto improve the performance of ay cast iron piston in
as—cast condition and sarisfy operating requirements,choosing raw material and position,
moldingtechnology and gatingsystem designing,smelting,inoculation and otheraspects are optimized and
gray castiron piston castings as—castin condition satisfying technical requirements
are essfully yield ofthe castings aboveis 95% .The castings have been widely used in
wagonbrake cylinder