保定市冷拔无缝钢管厂

冷轧（拔）无缝钢管主要生产工序：

The main production process of cold rolling (drawing) seamless steel pipe:

坯料准备→酸洗润滑→冷轧（拔）→热处理→矫直→精整→检验

Blank preparation, acid washing lubrication, cold rolling (drawing), heat treatment, straightening, finishing, and inspection

一般的无缝钢管的生产工艺可以分为冷拔与热轧两种，冷轧无缝钢管的生产流程一般要比热轧要复杂，管坯首先要进行三辊连轧，挤压后要进行定径测试，如果表面没有响应裂纹后圆管要经过割机进行切割，切割成长度约一米的坯料。然后进入退火流程，退火要用酸性液体进行酸洗，酸洗时要注意表面是否有大量的起泡产生，如果有大量的起泡产生说明钢管的质量达不到相应的标准。外观上冷轧无缝钢管要短于热轧无缝钢管，冷轧无缝钢管的壁厚一般比热轧无缝钢管要小，但是表面看起来比厚壁无缝钢管更加明亮，表面没有太多的粗糙，口径也没有太多的毛刺。

The production process of seamless steel tube in general can be divided into two kinds of hot rolling and cold drawing, cold-rolled seamless steel pipe production process than hot-rolled billet to complex, first to three roller rolling and extrusion to sizing test, if the tube through the cutting machine cutting surface without crack growth response after cutting blank about one meter. Then enter the annealing process. The acid solution should be used for acid washing. When it is pickled, we should pay attention to whether there is a lot of bubbling on the surface. If there is a lot of blister, the quality of the steel pipe can not reach the corresponding standard. The appearance of cold-rolled seamless steel tube is shorter than that of hot-rolled seamless steel tube, and the wall thickness of cold-rolled seamless steel tube is generally smaller than that of hot-rolled seamless steel tube, but the surface looks more bright than the thick wall seamless steel tube, the surface is not too rough, and there is not much burr on the caliber.

热轧无缝钢管的交货状态一般是热轧状态经过热处理后进行交货。热轧无缝钢管在经过质检后要经过工作人员的严格的手工挑选，在质检后要进行表面涂油，然后紧接着是多次的冷拔实验，热轧处理后要进行穿孔的实验，如果穿孔扩径过大就要进行矫直矫正。在矫直后再由传送装置传送到探伤机进行探伤实验，最后贴上标签、进行规格编排后放置到到仓库当中。

The delivery state of hot rolled seamless steel tubes is generally due to hot rolling after heat treatment. Hot rolled seamless steel tube after quality inspection after staff strict hand picked in quality inspection should be carried out after the oil surface, followed by cold drawing experiments, hot rolling process should be carried out after the perforation experiment, if perforated expanding too large to carry out straightening correction. After the straightening, the transmission device is transferred to the flaw detector for the detection experiment. Finally, the label is attached and the specifications are arranged and placed into the warehouse.