【摘要】 合成了高中和度复合铝磷酸盐粘结剂,用它与高铬刚玉砂、电熔镁砂粉配制的磷酸盐自硬砂,具有较好的常温强度、高温强度,适中的残留强度和低吸湿性。用这种型砂制作型芯,可解决厚大铸钢件内不易铸出的小径深孔腔室的成形难题。更多还原

【Abstract】 A high neutralization degree compounded aluminum phosphate binder is synthesized.No bake phosphate mixture,composed of the binder,high chromite corundum sand and fused magnesia powder,has good room and high temperature strength,moderate retained strength and low hydroscopicity.A difficult foundry problem about the cast shaping of the small and deep holes in the heavy section steel castings can be solved by using the no bake sand.for making cores.更多还原