发动机铸铁材料导热性能研究  

Study On Thermal Conductivity Of Cast Iron For Engine

作　　者：金通 袁福安 康明 涂欣达 刘诗逸 ZHANG Xin-ming YAN Ke-chun JIN Tong;YUAN Fuan;KANG Ming;Tu Xin-da;ZHANG Xin-ming;Liu Shiyi;YAN Ke-chun(Dongfeng Commercial Vehicle Technology Center,Wuhan 442000,China)

机构地区：[1]东风商用车有限公司技术中心,武汉442000

出　　处：《汽车科技》2021年第2期66-69,共4页Auto Sci-Tech

摘　　要：本文研究了发动机铸铁材料的组织和化学成分对其导热性能的影响。试验结果表明:灰铸铁的热扩散性能明显优于蠕墨铸铁,但随着温度的升高其差别越小;灰铸铁碳含量越高热扩散性能越好,蠕墨铸铁蠕化率越高热扩散性能越好;化学元素中Si能够明显降低铸铁热扩散性能,而其他合金元素对热扩散性能影响较小。The effect of microstructure and chemical composition on thermal conductivity of cast iron engine was studied.The results show that the thermal diffusivity of grey iron was better than that of vermicular iron,but the difference was smaller with the increase of temperature.The thermal diffusivity was better with the increase of carbon content of gray iron and vermicular rate of vermicular Iron.Si could significantly reduce thermal diffusivity of cast iron,but other alloying elements had little influence on the thermal diffusivity.

关 键 词：热应力 热扩散率 缸盖 铸铁 

分 类 号：TG143[一般工业技术—材料科学与工程]