铸铁用水基消失模涂料的制备及其性能研究  

Preparation and Properties of Water-based EPC Coating for Cast Iron

作　　者：李田霞 陈峰[2] LI Tianxia1, CHEN Feng2(1. School of Biological Engineering, Wuhan Polytechnic,Wuhan 430074, China; 2. School of Mechanical Engineering, Wuhan Polytechnic, Wuhan 430074, Chin)

机构地区：[1]武汉职业技术学院生物工程学院,湖北武汉430074 [2]武汉职业技术学院机电工程学院,湖北武汉430074

出　　处：《热加工工艺》2018年第5期96-98,101,共4页Hot Working Technology

摘　　要：选用铝矾土和石墨为耐火骨料,硅溶胶和聚乙烯醇（PVA）为复合粘结剂,钠基膨润土和羧甲基纤维素（CMC）为复合悬浮剂,配置了铸铁消失模铸造涂料,并进行了涂料的各项性能测试。在确定耐火骨料（铝矾土和石墨）配比的基础上,通过正交试验确定了涂料中硅溶胶、PVA、钠基膨润土、CMC的最佳配比,并进行了生产验证。结果表明,以铝矾土90%,石墨10%为耐火骨料,4%硅溶胶、3%PVA、4%钠基膨润土、3%CMC的涂料的综合性能最好,能够满足铸铁消失模铸造的要求。Taking bauxite and graphite as refractory aggregate, silica sol and polyvinyl alcohol （PVA） as composite agglomerant, sodium bentonite and earboxymethyl cellulose （CMC） as composite suspending agent, the coatings for east iron lost foam casting were configured, and the properties of the coatings were tested. Based on the determination of refractory aggregate propotion of bauxite and graphite, the optimal propotion of silica sol, PVA, sodium bentonite and CMC in the coating was determined, and the production verification was carried out. The results show that taking 90% bauxite and 10% graphite as refractory aggregate, the comprehesive properties of the coating with 4% silica sol, 3% PVA, 5% sodium bentonite, 4% CMC is the best, which can meet the requirement of cast iron lost foam casting.

关 键 词：消失模涂料 铸铁 透气性 表面强度 

分 类 号：TG223[金属学及工艺—铸造]