1.压铸模材料的原始状态 1)宏观腐蚀检查。 在钢材的两端进行宏观腐蚀试验,检查项目如下:多孔性,偏析,龟裂,发裂(由白点引起的),锤裂,接缝,以及非金属夹杂物等。并与协定的要求比较。 2)超声波探伤检查。 通过超声波试验可以检查出钢材内部的缺陷及缺陷的大小。大部分的缺陷是细小的 1. The original state of die-casting mold material 1) macro-corrosion inspection. Macroscopic corrosion tests were performed on both ends of the steel. The items examined were as follows: porosity, segregation, cracking, cracking (caused by white spots), crazing, seams, and non-metallic inclusions. And compared with the requirements of the agreement. 2) ultrasonic flaw detection. Through the ultrasonic test can detect the internal defects of steel and the size of defects. Most defects are small