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某公司生产的32CrMo4钢射孔枪管探伤合格率一直很低,通过宏、微观形貌分析、化学成分分析、低倍检验以及热处理工艺分析等方法对废品射孔枪管进行了深入的检查和分析。结果表明:不合格的射孔枪管含有纵向裂纹,这些裂纹是在淬火过程中,由于实际生产中为降低生产成本和减少污染,用水淬取代了油淬,而水淬应力过大极易使射孔枪管产生裂纹,从而大大降低了产品的合格率。通过降低射孔枪管钢材料的碳含量,用26CrMo4钢替代32CrMo4钢能有效提高产品的探伤合格率,同时也能满足射孔枪管的原使用要求。
The passing rate of a 32CrMo4 steel perforated barrel produced by a company has been very low. The perforation barrel of the scrap was inspected in depth through macroscopic, micromorphological analysis, chemical composition analysis, low magnification test and heat treatment process analysis. analysis. The results show that the unqualified perforation barrel contains longitudinal cracks. These cracks are quenched in the process of quenching. In order to reduce the production cost and reduce the pollution in actual production, Perforating barrel cracks, thus greatly reducing the passing rate of the product. By reducing the carbon content of perforation barrel steel material, the replacement of 32CrMo4 steel with 26CrMo4 steel can effectively improve the passing rate of the product testing, and can also meet the original requirements of perforation barrel.