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CNG发动机用耐热疲劳高硅蠕墨铸铁材料研究
Research on High Si Heat Resistant Vermicular Graphite Cast Iron Material for CNG Engine
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- DOI:
- 作者:
- 纪汉成 吴启洪
JI Hancheng;WU Qihong
- 作者单位:
- 科华控股溧阳市联华机械制造有限公司 溧阳市绿色铸造产业技术创新战略联盟
Kehua Holdings Liyang Lianhua Machinery Manufacturing Co.,Ltd.,Changzhou 213351,China;Liyang Green Foundry Industry Technology Innovation Strategic Alliance,Changzhou 213351,China
- 关键词:
- 高硅耐热蠕墨铸铁 涡轮增压器壳 耐热疲劳性
high silicon heat-resistant vermicular graphite cast iron turbocharger housing thermal fatigue resistance
- 摘要:
- 研究开发了CNG发动机用耐热疲劳高性能的高硅耐热蠕墨铸铁,采用壳型铸造制备涡轮增压器壳铸件及本体试样。通过多种合金元素最优化复合搭配使用,使该蠕墨铸铁的常温及高温综合机械性能良好,并具有优良的耐热疲劳性能、抗氧化性能、高温强度及在高温中具有良好的尺寸稳定性和良好的导热能力。经过发动机试验台耐久试验及装车试验证明,其蠕墨铸铁产品能够经受周期性载荷及热应力的作用,满足CNG发动机频繁停车怠速冷热冲击的工况条件,使用寿命比现有铸铁材料大幅度提高。
performance for CNG engines.Shell casting was used to prepare turbocharger housing castings and body samples.Through the use of multiple alloying elements optimized and combined,the vermicular graphite cast iron has good comprehensive mechanical properties at room temperature and high temperature,and has excellent heat fatigue resistance,oxidation resistance,high temperature strength and good dimensional stability at high temperatures.And good thermal conductivity.The endurance test and loading test of the engine test bench prove that its vermicular graphite cast iron products can withstand the effects of periodic load and thermal stress,meet the working conditions of frequent idling and cold and heat shock of CNG engines,and have a longer service life than existing cast iron materials substantial improvement.