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本厂生产的直径75毫米的20钢管坯,经酸洗检验,发现有翘皮与横裂。这些缺陷分布面积广,数量也多(约占5～10%),磨修困难。苦不消除,将严重影响成品质量与产量。经火花检验该缺陷含碳量极高。与通常遇到的翘皮、横裂绝不相同。我们通过工人、领导和技术人员三结合的现场调查,对缺陷的特征、产生原因进行了试验探讨,并结合生产改进措施,提高了管坯质量。
The factory production of 75 mm diameter steel billet 20, pickling test and found that there Alice and transverse cracking. These defects are distributed in a wide area and in large numbers (about 5 to 10%), which makes grinding difficult. Do not eliminate, will seriously affect the quality and output of finished products. The spark test of the defect carbon content is extremely high. And commonly encountered Alice, cross-cracking is not the same. Through the field investigation of the combination of workers, leaders and technicians, we conducted a trial and discussion on the characteristics and causes of the defects, and combined with the measures for production improvement, we improved the quality of the tube blank.