Research on High Si Heat Resistant Vermicular Graphite Cast Iron Material for CNG Engine
Author of the article:JI Hancheng;WU Qihong
Author's Workplace：Kehua Holdings Liyang Lianhua Machinery Manufacturing Co.,Ltd.,Changzhou 213351,China;Liyang Green Foundry Industry Technology Innovation Strategic Alliance,Changzhou 213351,China
Key Words：high silicon heat-resistant vermicular graphite cast iron turbocharger housing thermal fatigue resistance
Abstract：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.
