摘要
提出一种检测湿型砂抗拉强度的新方法——双冲裂试验。分析了型砂湿态劈裂强度测定的缺点。通过试验和研究,确定了双冲裂试验用压块最佳直径为16mm,并提出了抗拉强度的计算公式。通过生产应用证明,该方法简单、可靠、可以在型砂液压强度试验仪上应用。
Liu Chengyao and others.New Method of Determining the Tensile Strength of Green Sand—Double Punch Test.The paper advances a new method of determining the tensile strength of green sand—double punch test and analyses the disadvantages of splitting strength test of green Sand. Through test, the optimum diameter of dist for double punch test has been determined and the formula to calculate the tensile strength has been reached. Production practice has proved the test is simple and reliable, and it can also be carried out with exsiting hydraulic strength apparatus.
