采用改性水玻璃改善自硬砂溃散性的试验研究表明,改性水玻璃—酯自硬砂溃散性良好,再配以QM附加物,自硬砂残留抗压强度进一步降低,在800℃时残留强度小于0.1MPa,在1000℃时残留强度小于0.3 MPa,浇注后容易落砂清理。文中对改性水玻璃的制备、酯硬化剂种类、水玻璃模数等因素进行了分析试验。 Experimental study on improving the collapsibility of self-hardening sand with modified water glass showed that the modified water glass-ester self-hardening sand had good collapsibility. When combined with QM adduct, the residual compressive strength of self-hardening sand further decreased. At 800 ℃ Residual strength of less than 0.1MPa, residual strength of less than 0.3MPa at 1000 ℃, after pouring easy to clean sand. In this paper, the preparation of modified water glass, ester hardener types, water glass modulus and other factors were analyzed and tested.