摘要
精密铸造镍铜合金M-35-1/Mone中,镍与铜的熔点相差较大,满足镍的熔炼要求时,铜在高温下熔炼时间太长,导致氧化严重,形成氧化铜夹杂存在于铸件晶体之间,使内部组织不致密,不能通过气压测试。经过改变加料顺序及脱氧方法,减轻了铜的氧化,铸件经外观及内在质量检查,完全符合要求,气压测试合格率达97%以上。
Ni-Cu M-35-1/Monel alloy in investment casting can not pass the examination of gas pressure due to low compactness of microstructure resulting from the generation of CuO inclusion in grain,which is attributed to long time Cu smelting at high temperature resulting in the serious oxidation due to the high difference of melt point between Ni and Cu.Through adjusting material-adding sequence and deoxidized method,increasing deoxidized time to fully ensure deoxidization as well as shortening oxidized time of Cu at high temperature to reduce the oxidation of Cu,the problems can be effectively eliminated.The investment castings can totally meet the requirement by quality check with qualified rate more than 97% of gas pressure examination.
出处
《特种铸造及有色合金》
CAS
CSCD
北大核心
2007年第11期863-864,共2页
Special Casting & Nonferrous Alloys
关键词
精密铸造
镍铜合金
熔炼
Investment Casting,Ni-Cu Alloy,Smelting
