型砂性能检测的新探索

NEW RESEARCH ON THE MEASURING SYSTEM OFGREEN SAND PROPERTIES

介绍了一种研制的型砂性能检测系统与测试方法，通过对标准砂样的测试，能迅速、准确地测得砂样受载过程中的应力—应变的动态关系曲线及反映型砂本质特征的几项性能参数，这是型砂性能检测领域中的新探索，其中型砂粘弹性指标及塑性变形临界值乃是型砂性能方面的新概念。

A developed measuring system and test method of green sand properties are introducedBy means of measuring the standard molding sand specimens,the dynamic curves of stressstrain can be quickly and accurately plotted out and several parameters,which represent the characteristics of molding sand,can be tested during the process of compressive deformationIn this brand new method of property measurement two new concepts of viscoelastic parameter and plastic deformation threshold are put forward