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冷轧(拔)同热轧后的钢管比较,其尺寸精确、表面光洁,并在冷形变过程中引进了大量位错。只要管坯内外表面缺陷严加清理和成品采用合理的热处理工艺,它对适应用户的不同使用要求,具有很大的技术潜力。然而,按YB231—70标准规定,冷轧(拔)钢管除外径和壁厚公差的要求略高之外,其表面质量和力学性能与热轧钢管相同,而这一标准产品的用量约占全国冷轧(拔)钢管生产
Compared with the hot rolled steel tube, the cold rolled (drawn) steel is precise in size and smooth in surface, and introduces a large number of dislocations during cold deformation. As long as the inner and outer surface of the tube defects and the strict cleaning of finished products using a reasonable heat treatment process, which adapt to different user requirements, with great technical potential. However, according to the YB231-70 standard, the surface quality and mechanical properties of the cold rolled (drawn) steel pipe are the same as those of the hot rolled steel pipe except for the slightly higher requirements on the outside diameter and the wall thickness tolerance, and the amount of this standard product occupies about the whole country Cold (pull) pipe production