厚大球墨铸铁飞轮铸造铁液熔炼工艺研究  

Study on the Melting Process of Heavy Ductile Iron Flywheel

作　　者：颉向旭 宫显辉 张涛 XIE Xiangxu;GONG Xianhui;ZHANG Tao(Shaanxi Diesel Engine Heavy Industry Co.,Ltd.,Xingping 713100,China)

机构地区：[1]陕西柴油机重工有限公司,陕西兴平713100

出　　处：《铸造技术》2021年第10期866-868,共3页Foundry Technology

摘　　要：中速柴油机飞轮,厚度297 mm,属于厚大球墨铸铁件,在生产调试阶段,铸件上表面存在严重的石墨漂浮缺陷,为解决此问题,通过将铁液碳当量由4.57%降低至4.32%后,在后续批量生产中,再无石墨漂浮现象,彻底解决了厚大铸件存在石墨漂浮的问题。Medium speed diesel engine flywheel has a thickness of 297 mm,and belongs to thick nodular iron castings.In the initial trial production stage,there is serious graphite flotation defect on the upper surface of the castings,in order to solve the problem,carbon equivalent is reduced from 4.57%to 4.32%.after this improvement graphite flotation has been eliminated and good microstructure and properties are obtained.

关 键 词：碳当量 石墨漂浮 球墨铸铁 

分 类 号：TG255[金属学及工艺—铸造]