摘要
在镍基高温合金单晶叶片精密铸造用型壳中添加短切碳纤维,制备了短切碳纤维改性复合型壳,研究了纤维含量对型壳中温、高温线收缩率及高温自重变形的影响。结果表明:随着碳纤维含量的增加,型壳试样的中温、高温线收缩率均减小,型壳试样的高温线收缩率显著大于型壳中温线收缩率;添加短切碳纤维对型壳抵抗高温变形的能力都有一定的提升,随着碳纤维含量的增加,型壳试样的高温自重变形率先减小后增大。碳纤维含量为4 g/L时,型壳的高温自重变形率最低,降至0.81%。
Short carbon fiber was used to produce fiber modified shell for investment casting of nickel based superalloy single crystal blade. The effects of carbon fiber content on linear shrinkage rate of shell at medium temperature, high temperature and high temperature gravitational distortion were studied. The results show that with the increase of carbon fiber content, the linear shrinkage rates of shell at medium temperature and high temperature decrease, and the linear shrinkage rate of shell at high temperature is bigger than that of shell at medium temperature. The ability to resist high temperature deformation of the shell has a certain improvement by adding short carbon fiber. With the increase of carbon fiber content, the high temperature gravitational distortion rate of the shell decreases firstly and then increases. When the carbon fiber content is 4 g/L, the high-temperature gravitational distortion rate of the shell is the lowest, which is 0.81%.
出处
《热加工工艺》
CSCD
北大核心
2017年第1期88-90,94,共4页
Hot Working Technology
基金
江苏省工业支撑重点项目(BE2014007)
江苏省重大关键核心技术研发项目(苏发改[2013]2027号)
关键词
短切碳纤维
熔模铸造
型壳
线收缩率
高温自重变形
short carbon fiber
investment casting
shell
linear shrinkage rate
gravitational distortion
