我厂周期轧管机组在生产无缝钢管时,需将加热后的钢锭先在1800吨或1000吨水压穿孔机中穿孔,然后进行延伸和轧制。过去穿孔机冲头一直采用 3Cr_2 W_8 V钢制作。在长期的生产实践中,我们发现3Cr_2 W_8 V 钢冲头存在下列问题:1)由于3Cr_1 W_8 V 钢工艺性能不好,我们外购的冲头锻坯多次因表面裂纹和内 I plant periodic pipe rolling unit in the production of seamless steel pipe, the need to heat the ingot in 1800 tons or 1000 tons of hydraulic perforation machine perforation, and then for extension and rolling. In the past punch punches have been made of 3Cr_2 W_8 V steel. In the long-term production practice, we found the following problems with 3Cr_2W_8V steel punches: 1) Due to the poor process performance of 3Cr_1W_8V steel,