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一、前言铝矾土合成料是一种多孔性的莫来石一刚玉质耐火材料,采用我国丰富的高铝矾土原料与优质粘土,按莫来石成份配方、制坯,并在高温下长时间煅烧而成,经破碎、分粒、水洗、烘干后,按技术条件规定的规格供熔模精密铸造制壳使用。自一九七一年开始,湖南省株州湘江机器厂开始研制,并在许多航空发动机叶片和一般精铸件上试用。近几年来,又在我所研制的无余量涡轮叶片和定向凝固工艺上正式采用,都获得了良好的效果。
I. Introduction Bauxite synthetic material is a porous mullite-corundum refractories, using our rich bauxite raw materials and high-quality clay, according to the composition of mullite ingredients, billets, and at high temperatures Calcined for a long time, after crushing, granulating, washing, drying, according to the specifications of the technical conditions for investment casting mold shell. Since 1981, Hunan Zhuzhou Xiangjiang Machine Factory began to develop and tried on many aviation engine blades and general precision castings. In recent years, I have developed in the no-margin turbine blades and directional solidification process officially adopted, have achieved good results.