磷酸盐自硬芯料用于熔模型壳填充的研究  

Application of Phosphate Self-forming Core Materials to Investment Casting Shell Mold Filling

作　　者：朱胤[1] 闵小俊[1] 王琳[1] 刘利军[1] 

机构地区：[1]四川大学制造学院

出　　处：《特种铸造及有色合金》2007年第5期376-379,共4页Special Casting & Nonferrous Alloys

摘　　要：研究了用JX和JXR系列浇注成形磷酸盐自硬芯料填充型壳狭窄空腔的工艺。进行了浆料流动性和悬浮稳定性、填充料焙烧后强度、高温稳定性及残余强度测试;对比了JX-2、JXR-2芯料和针对填充用途优化的JXR-3芯料性能。结果表明,在满足浆料高流动性条件下,JXR-3的性能优于JX-2和JXR-2,具有足够的工作时间和悬浮稳定性、较高的焙烧后强度和高温稳定性。对比研究了水、硅溶胶和磷酸溶液3种浆料混合液体,结果表明,硅溶胶的效果最优。铸件浇注试验表明,JXR-3浆料能够方便地用于型壳狭窄空腔填充,成功地避免了铸件内腔的夹铁和鼓胀缺陷。JX and JXR series phosphate self-forming core materials used to fill narrow cavity in investment casting shell mold have been investigated including slurry fluidity and suspending stability, baked strength and high temperature stability as well as residual strength of the filler. In addition, JX-2 and JXR-2 materials have been compared with optimized JXR-3 for filling. The results show that the properties of JXR-3 is superior to that of JX-2 and JXR-2 in condition of meeting high fluidity, exhibiting desirable working time and suspending stability, higher baked strength and higher temperature stability. The sol silicate slurry mixing is the best in three kinds of slurry mixing including water, sol silicate and phosphate acid solution. The experimental results verified that the JXR-3 slurry is suitable for filling narrow cavity in investment casting shell mold, effectively avoiding the casting swelling and metal-leakage defects in cavity.

关 键 词：磷酸盐自硬材料 熔模铸造 型壳内腔 填充 夹铁 

分 类 号：TG249.5[机械工程—精密仪器及机械]