铸造技术2011，Vol.32Issue(1)：27-30,4.
铝磷酸盐热硬砂粘结机理探讨
Discuss of Bond Mechanism of AI-phosphate Hot Cured Sand
摘要
Abstract
Based on the dry strength testing of Al-phosphate hot cured sand samples, the bond mechanism was discussed, and the effect of modifier on bond mechanism was analyzed by SEM and EMPA. It is revealed that fracture mode of Al-phosphate hot cured sand sample is basically adhesive fracture and brittle fracture with low dry strength and small among of binding points between sand particles. Fracture mode of Al-phosphate hot cured sand is changed from adhesive fracture and brittle fracture to cohesive fracture and plastic fracture and the binding bridge are refined and amount of cracks in binding bridge are reduced after adding magnesium containing modifier and boron containing modifier simultaneously. Viscosity of binder is improved at the same density after adding magnesium-containing modifier, and binding points between sand particles are increased, so that the dry strength is improved too.关键词
铝磷酸盐热硬砂/粘结机理/干强度/附着断裂/内聚断裂分类
矿业与冶金引用本文复制引用
夏露,张友寿,黄晋,董仕杰,李四年..铝磷酸盐热硬砂粘结机理探讨[J].铸造技术,2011,32(1):27-30,4.基金项目
湖北省科技厅自然基金项目(2009CDB297) （2009CDB297）
