改性磷酸盐粘结剂热硬砂性能研究  

Study on the Properties of Modified Phosphate Binder Hot-Hardening Sand

作　　者：谭青焕 张友寿 夏露 骆志鹏 TAN Qing-huan;ZHANG You-shou;XIA Lu;LUO Zhi-peng(School of Materials and Chemical Engineering,Hubei University of Technology,Wuhan 430068,Hubei,China;Hubei Provincial Key Laboratory of Green Light Industrial Materials,Wuhan 430068,Hubei,China)

机构地区：[1]湖北工业大学材料与化学工程学院,湖北武汉430068 [2]绿色轻工材料湖北省重点实验室,湖北武汉430068

出　　处：《铸造》2022年第10期1276-1280,共5页Foundry

摘　　要：通过添加碱性有机物对现有的磷酸盐粘结剂进行改性,制备型砂,采用射芯机制样,模具加热使试样固化成形。研究了改性物质及中和度对粘结剂的粘度、型砂的流动性、型砂试样的强度、抗吸湿性、型砂的溃散性的影响。结果表明,碱性有机物改性磷酸盐粘结剂,一方面能提高型砂试样的强度和抗吸湿性,试样在相对湿度为45%~60%时的即时抗拉强度最高达1.88 MPa;另一方面粘结剂的粘度明显地降低了,在一定程度上改善了型砂流动性。而粘结剂中和度的改变,对磷酸盐粘结剂热硬砂的固化时间和抗吸湿性也有较明显的影响。The existing phosphate binder was modified by adding alkaline organic matter to prepare molding sand.The core shooting machine sample was used and the mold was heated to solidify the sample. The effects of modified substances and neutralization degree on the viscosity of binder, the fuidity of molding sand, the strength of molding sand sample, moisture absorption resistance and collapsibility of molding sand were studied.The results show that the phosphate binder modified by alkaline organic matter can improve the strength and moisture absorption resistance of molding sand samples on the one hand. The instant tensile strength of the samples is up to 1.88 MPa when the relative humidity is 45%-60%;On the other hand, the viscosity of binder is obviously reduced, which improves the fluidity of molding sand to a certain extent.The change of neutralization degree of binder also has an obvious effect on the curing time and moisture absorption resistance of phosphate binder hot setting sand.

关 键 词：碱性有机物 中和度 粘度 型砂流动性 强度 抗吸湿性 

分 类 号：TG146.21[一般工业技术—材料科学与工程]