• CN：11-2187/TH
  • ISSN：0577-6686
机械工程学报

›› 1991, Vol. 27 ›› Issue (1): 65-71.

• 论文 • 上一篇    下一篇

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型砂的高温力学性能及应力-应变关系

徐东;安阁英;孟爽芬;李庆春   

  1. 哈尔滨工业大学
  • 发布日期:1991-01-01

MECHANICAL PROPERTIES AND STRESS-STRAIN MODEL OF MOLDING SANDS AT ELEVATED TEMPERATURE

Xu Dong;An Geying;Meng Shuangfen;Li Qingchun   

  1. Harbin Institute of Technology
  • Published:1991-01-01

摘要： 本文对国内中、大型铸钢件生产中常用的几种型砂的高温力学性能进行了实验研究。通过测取型砂在不同温度下单轴压缩的应力-应变曲线，求得型砂在不同温度下的形变模量E，抗压强度σ p以及型砂软化后的粘度系数φ。通过测定试样的破坏角求出型砂的摩擦角ψ和粘聚力C。应用实验中获得的力学参数，建立了型砂在高温下的弹塑性或粘性的应力-应变模型。

关键词: 力学性能, 型砂, 应力-应变

Abstract: Mechanical properties of several kinds of molding sands, which are often used in production of large scale steel castings, have been experimentally researched for temperature range 20℃ to 1300℃. Uniaxial compression stress-strain curves are obtained by a SWX-II molding sand testing device, from which deformation modulus, strength of the molding sands at different temperature or viscosity of the molding sands when they soften are calculated. By means of measuring destroy angles of sand specimens, the angles of internal friction of the molding sands are obtained, and then cohesive strength of the molding sanding is calculated. According to the experimental results, a stress-strain model of the molding sands is presented.

Key words: 力学性能, 型砂, 应力-应变

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