酯硬化水玻璃砂工艺性能的影响因素.pdfVIP

学兔兔 酯硬化水玻璃砂工艺性能的影响因素 王华英 (北车集团大连机车车辆有限公司，辽宁 大连 116022) 摘要：简述了酯硬化水玻璃砂的硬化机制和工艺特点，测试了不同配比酯硬化水玻璃砂的抗拉 强度，分析了酯硬化水玻璃砂工艺性能的主要影响因素，从环境温度和湿度、原砂质量、水玻 璃黏度及其加入量、有机酯的选用探讨了型砂性能的控制方法。生产实践表明，采用新型改性 水玻璃和配套有机酯固化剂，可减少水玻璃的加入量，改善型(芯)砂的溃散性，较好地解决 普通水玻璃砂难以清砂的问题。 关键词：酯硬化水玻璃砂；溃散性；铸钢件 中图分类号：TG221 ．2 文献标识码：A 文章编号：1673-3320(2015)02-0001—04 Factors Influencing Process Performance of Ester Cured Sodium Silicate Sand WANG Huaying (CNR Dalian LocomotiveRolling Stock Co．，Ltd．，Dalian 116022，Liaoning，China) Abstract：The hardening mechanism and the technological characteristics of ester cured sodium silicate sand were described．The tensile strength of ester cured sodium silicate sand with different proportion were tested，and the main factors influencing the process performance of ester cured sodium silicate sand were analyzed．The control methods of sand properties．including the environment temperature and humidity,the quality of base sand，the viscosity of sodium silicate and its addition and the selection of organic ester,were discussed．Production practice shows that the addition of sodium silicate can be reduced by using a combination of new modified sodium silicate and organic ester,and the collapsibility of mold／core sand would be improved．Thus the removal difficulty for ordinary sodium silicate sand has been solved preferably． Kev words：ester cured sodium silicate sand；collapsibility：steel casting 随着铁路几次大提速和电力机车的不断开 度0．35～0．54 MPa。在侧架大三角芯上采用连续 发，机车需求量在不断扩大，对铸钢件产品质量 式混砂机混砂后手工制芯，清砂时砂芯溃散性较 的要求也越来越高。酯硬化水玻璃砂解决了CO 水 好，侧架三角芯部位经探伤未发现有铸造缺陷。 玻璃砂溃散性差的问题，型砂溃散性与树脂砂比 随后通过制芯生产线将酯硬化水玻璃砂推广应用