石英长石砂抗夹砂性能研究-《郑州大学学报(工学版)》

文章信息/Info

Author(s):: Rokzi; Department of Mechanical Engineering, Zhengzhou Institute of Technology

摘要:: 本文介绍了具有精确度高、稳定性好,制造与安装方便的差动变压器式电感动态测微仪作为研究型砂在高温下的线性热膨胀和热变形的测试手段;还介绍了用液压万能强度试验机研究型砂高温杭压强度和热变形的简单装置。文中阐明了用上述仪器研究石英长石砂的热膨胀和热变形特性;不同紧实度、不同煤粉和木屑加入量对其热膨胀和热变形的影响。并通过一系列试验曲线的对比,分析了石英长石砂对减少铸件夹砂倾向的有利条件。从而为充分开发和利用河南省资源丰富的石英长石砂提供了进一步的理论依据。最后还介绍了几年来部分工厂使用石英长石砂生产出各种类型优质铸铁件的情况。

Abstract:: This paper introduces a differential transformer inductance dynamic micrometer with high accuracy, good stability, convenient manufacture and installation as a test method to study linear thermal expansion and thermal deformation of sand under high temperature.A simple device for studying high temperature compressive strength and thermal deformation of molding sand with hydraulic universal strength tester is also introduced.The thermal expansion and deformation characteristics of quartz feldspar sand are studied by the above instruments.Effect of different compactness, different amount of pulverized coal and wood chips on thermal expansion and thermal deformation.By comparing a series of test curves, the favorable conditions of quartz-feldspar sand to reduce the sand trapping tendency of castings are analyzed.It provides a further theoretical basis for the full exploitation and utilization of quartz-feldspar sand in Henan Province.Finally, the production of various types of high-quality cast iron by quartz-feldspar sand in some factories in recent years is introduced.