夹砂是一种常见的铸造缺陷。人们对它产生的过程虽然有各种解释，但如何确定湿型砂的抗夹砂能力，尚没有统一的标准。笔者拟用测定湿型砂的热湿拉强度和用激热试验测定型砂表面开裂时间〔１〕两种方法来综合评价湿型砂的抗夹砂能力。一、试验方法分析湿型砂铸造的铸件易产... Sand is a common casting defects. Although people have various explanations on the process it produces, there is no unified standard on how to determine the anti-sand-holding ability of wet sand. The author intends to determine the hot wet tensile strength of wet sand and hot test to determine the cracking time of the surface of the sand [1] two methods to comprehensively evaluate the wet sand sand resistance capacity. First, the test method analysis wet sand casting easy to produce ...