CAJ | 학술논문

通过引入弱酸对磷酸盐粘结剂进行改性,考察改性后磷酸盐粘结剂的稳定性和自硬砂的性能.试验结果表明,改性后的磷酸盐粘结剂具有好的稳定性;自硬砂具有极低的残留强度;柠檬酸改性可以显著提高型砂抗拉强度,同时在一定程度上延长脱模时间.
통과인입약산대린산염점결제진행개성,고찰개성후린산염점결제적은정성화자경사적성능.시험결과표명,개성후적린산염점결제구유호적은정성;자경사구유겁저적잔류강도;저몽산개성가이현저제고형사항랍강도,동시재일정정도상연장탈모시간.
The modification of phosphate binder by weak acid was stuided in this paper. Stability of modified phosphate binder and properties of phosphate binded no-bake sand were investigated. The results show that phosphate binder modified by citric acid has good stability and the phosphate binded no-bake sand has very low residual strength. The addtion of citric into the phosphate binder improved the tensile strength of sand mould obviously and prolonged the stripping time to some extent.