摘要
中间体是涡轮增压器的重要组成部分,由于其特殊结构,在法兰薄壁位置容易形成D型石墨,影响中间体整体的力学性能。从热力学及动力学角度探讨了中间体法兰薄壁处D型石墨的形成机理,重点介绍了孕育处理促进石墨形核的机理,以及对改善薄壁D型石墨的作用,最后举例并概括了适合薄壁铸件的孕育剂种类。
The bearing housing is an important part of turbocharger.Due to its special structure,D-type graphite is easy to form in the thin-walled position of flange,which affects the overall mechanical properties of the bearing housing.In this paper,the formation mechanism of D-type graphite in the thin wall of bearing housing flange is discussed from the point of thermodynamics and dynamics.The mechanism of promoting graphite nucleation by inoculation treatment and its effect on improving the D-type graphite are mainly introduced.Finally,the kinds of inoculants suitable for thin wall castings are illustrated and summarized.
作者
佘恺
王今胜
李赵
张小虎
SHE Kai;WANG Jin-sheng;LI Zhao;ZHANG Xiao-hu(CRRC Qishuyan Rolling Stock Research Institute Co.,Ltd.,Changzhou 213011,Jiangsu,China)
出处
《铸造》
CAS
北大核心
2020年第9期919-923,共5页
Foundry
关键词
中间体
D型石墨
热力学及动力学
形成机理
孕育处理
bearing housing
D-type graphite
thermodynamics and dynamics
formation mechanism
inoculation
