结构钢熔模铸件在机械性能试验或断口检查时常常出现冰糖断口,这对铸件的性能影响很大,尤其使试样或铸件的塑性和冲击韧性大为降低。有的工厂由于出现冰糖断口,造成了大批铸件报废。这便促使人们对冰糖断口进行试验研究,但是迄今为止,许多研究也都限于 Casting structural steel in the mechanical properties of the test or fracture inspection often appear rock sugar fracture, which has a significant impact on the performance of the castings, in particular, the specimen or castings greatly reduce the plasticity and impact toughness. Some factories due to rock sugar fracture, resulting in a large number of castings scrapped. This has led to experimental studies of rock sugar fractures, but so far many studies have been limited to