摘要
过渡性金属与Ａｌ形成的金属间化合物具有极好的耐热、耐蚀、耐磨性。利用过渡性金属与Ａｌ间的密度差，采用离心铸造工艺，通过控制凝固温度场、凝固速度和溶质传输，可获得铸件表面层主要由初晶金属间化合物组成的耐磨、耐热、耐蚀的梯度功能层。给出了制配参数；分析了离心转速、合金化学成分对梯度功能层组织的影响；检测了金属间化合物、成分及硬度的分布，并讨论了三者与耐磨性的关系及形成梯度功能层的机理。
The intermetallic compound formed owing to reaction between transition.metal and aluminium has excelleds heat-resisting, corrosion-resisting and'wear-resisting properties. With the help of the density difference betweentransition metal and aluminium during centrifugal casting process and controlling the temperamre field of solidification process, solidifcation velocity'and solace transfer, a heat-resisting, corrosion-resisting and wear-resistingcasting surface layer of gradient function composed mainly of primary crystalintermetallic compound can be obtained. The preparative parameters weregiven, the effect of centrifugal casting R.P.M and chemical compositionof alloy on the Structure of gradient function surface layer were analysed,intermetallic componnd, composition and hardness distribution were examined,the relationship among wear-resistance and theirs and the mechanism of forming gradient function surface layer were also discussed
出处
《铸造》
CAS
CSCD
北大核心
1994年第1期1-5,31,共6页
Foundry
