冷拔精密无缝钢管具有内外壁无氧化层、承受高压无泄漏、高精度、高光洁度、冷弯不变形、扩口压扁无裂缝、表面已作防锈处理等特点，主要用于机械结构、液压设备及汽车摩托车的气动或液压元件，如气缸或油缸等。
Cold drawn precision seamless steel tube with inner and outer wall oxide layer, under high pressure without leakage, high precision, high smoothness, cold bending deformation, flaring flattening without cracks, the surface has been antirusted characteristics, mainly used for mechanical structure, hydraulic equipment and automobile and motorcycle pneumatic or hydraulic components, such as cylinder or cylinder etc..
冷拔基本的工艺流程是：热轧毛管—>毛管检查、修磨—>毛管酸洗—>毛管酸洗后复检—>冷拔—>精拉道次前矫直—>酸洗、润滑—>精拉—>成品前处理—>入库。
The basic process is: the hot cold drawn capillary inspection, grinding capillary - > - > > after acid pickling capillary capillary re - > > was fine before drawing and straightening - > pickling, lubrication - > finish drawing - > finished pretreatment - > storage.
生产需要注意控制：
Attention should be paid to production control:
1、毛管
1. Capillary
毛管壁厚要均匀、内外表面缺陷少;要配置外表面抛光及内孔缺陷清理设备。
The wall thickness of the capillary should be uniform and the inner and outer surface defects are few; the outer surface polishing and inner hole defect cleaning equipment should be equipped.
2、复检
2, recheck
与普通冷拔钢管相比，冷拔精密无缝管生产增加了热轧毛管酸洗复检工序，主要是要保证毛管外表面无折叠、裂纹等缺陷，排除掉内表面存在折叠、严重划线、麻面等缺陷的毛管。
Compared with the common cold drawn steel tube, cold drawn precision seamless steel tube production increased hot rolled pickling capillary mainly to ensure that the review process, the capillary outer surface without folding, cracks and other defects, eliminate inner surface folds, serious defects such as pits, crossed the capillary.
3、工具
3, tools
一般冷拔精密无缝钢管生产所使用的工具的表面光洁度要求在Ra0.4以上，尺寸精度达到H3以上，硬度要求在HRC70以上。同时要求拉拔过程中不能出现顶头或模具粘钢现象
The surface finish of the tools used in the production of cold drawn precision seamless steel tube requires more than Ra0.4, the dimension accuracy is above H3, and the hardness requirement is above HRC70. At the same time, no plug or die sticking phenomenon is required during drawing
4、退火
4, annealing
退火在所有的冷拔管生产中是非常重要的工序，退火质量的好坏既影响钢管的性能也影响氧化铁皮的清除。冷拔精密钢管需要配置无氧化光亮退火炉设备。
Annealing is a very important process in the production of all cold drawn tubes. The quality of the annealing affects not only the performance of the steel tube, but also the clearance of the oxide scale. The equipment of no oxidation bright annealing furnace is needed for cold drawn precision steel pipe.
5、酸洗
5, acid washing
精密无缝钢管在硫酸酸洗过程中容易形成以Fe2O3、Fe3O4为主的“黑渣”，在后续生产中形成表面黑斑。Fe2O3、Fe3O4易溶于盐酸，为防止黑斑形成则在酸池中加入5-10g/l的NaCl。
It is easy to form "black slag" with Fe2O3 and Fe3O4 in the process of sulfuric acid pickling of precision seamless steel tube, and the surface black spots are formed in the subsequent production. Fe2O3 and Fe3O4 are soluble in hydrochloric acid. In order to prevent the formation of black spots, 5-10g/l NaCl is added into the acid bath.
6、润滑
6, lubrication
应选用树脂作润滑剂，这种润滑与磷化加润滑(皂化)相比有明显的区别，拔制出来的钢管呈现铁基体的本色，既有高的光洁度又有冷轧管般的漂亮外观色泽。
Resin should be chosen as lubricant, which has obvious difference compared with phosphating and lubrication (saponification). The steel tube produced out of it shows the true color of iron matrix. It has both high finish and beautiful appearance of cold rolling pipe.
生产冷拔精密无缝钢管的工业控制包括模具设计、退火、酸洗、润滑等条件控制，同时应在毛管质量检测、整修方面做好工作。
Industrial control of cold drawn precision seamless steel tube includes mold design, annealing, pickling, lubrication and other conditions control. At the same time, the work should be done in the quality inspection and repair of the pipe.