对刮痕强度试验机进行适当的改进,就可测量芯砂的冲击韧性,并使一机两用。通过对不同粘结剂加入量的水玻璃砂、覆膜砂、纸浆砂等的冲击韧性的测定,说明用消耗冲击功表示芯砂的韧性是可行的,测试方法简单、数据稳定、分辨能力较高,这给评价高强度的化学粘结剂砂性能提供了一种新的测试方法。 The scratch strength tester for proper improvement, you can measure the impact of sand core toughness, and make a machine dual-use. By measuring the impact toughness of sodium silicate sand, coated sand and pulp sand with different binder additions, it is feasible to use the impact energy to represent the toughness of core sand. The method has the advantages of simple test method, stable data and better resolving power High, which provides a new test method for evaluating the performance of high strength chemical binder sand.