摘要
提出一种简单可靠的实型负压铸钢件涂料常温和高湿透气率测试方法,通过尺寸修正和温度修正,计算出负压实型涂料的透气率,并以此为手段,研制出一种高透气率的实型负压铸钢件涂料.
The coating on steel castings in EPS-V process should be not only of high strength and high refractoriness, but also of high permeability. A simple but reliable method for sample preparation and permeability measurement is proposed. With dimension correction and temperature correction,the permeabilities of coating at both room and high temperatures are calculated. The influence of a variety of refractories and their sizes on the permeability are investigated. A coating with high permeability suitable for steel castings in EPS-V process has been prepared . The permeability is 1 5 at room temperature and 2 2 at high temperature (1 000℃). The ingredients are:100% of base materials with 70% of corundum (100~200 meshes ) and 3 0 % of bauxite (200 meshes ) , 1 8 % of binder ( silica gel ) , 3 % of bentonite , 0. 2% of thickening agent (CMC) ,0. 05% of wetting agent and 0. 2% of other additions.
出处
《华中理工大学学报》
CSCD
北大核心
1992年第A00期5-8,共4页
Journal of Huazhong University of Science and Technology
关键词
铸钢件
负压实型
涂料
透气率
steel castings
EPS-V process ,coating
permeability
