热钢产品的超声检验方法,在使用方面有二例: 1.在连续铸造中(图1)以监控牵引电机的办法来控制凝固壳的厚度,以便严格控制产量。 2.在轧制钢锭中由于存在缩孔和其它缺陷,致使优质钢必须切头;图2示出了可以用超声法检验的缩孔和不能检验的死区。检验的目的是为了确定缩孔的扩展深度以达到理想的切头长度。对于热钢锭中缩孔的检验尚在继续研究中。 Ultrasonic testing of hot steel products in the use of two cases: 1. In continuous casting (Figure 1) to control the traction motor approach to control the thickness of the solidified shell in order to strictly control the yield. 2. Due to the presence of shrinkage cavities and other defects in the rolled ingot, the high quality steel must be cut; Fig. 2 shows the shrinkage cavity and untestable dead zone that can be examined by the ultrasonic method. The purpose of the test is to determine the depth of expansion of the crater to achieve the desired length of the incision. The investigation of shrinkage cavity in hot ingot is still under study.