| 冷拔钢管一般需要多次拉拔 |
| 添加时间：2019/9/16 16:10:37 浏览次数： |
| 冷拔(轧)管又分为圆形管和异形管两种。 Cold-drawn (rolled) pipes are divided into circular pipes and special-shaped pipes. 冷拔钢管一般需要多次拉拔，在每次拉拔之间要有相应的去应力退火，保证下一次的冷拔顺利进行。从外表看冷轧无缝钢管往往是小直径的，热轧无缝钢管往往是大直径的。 Cold-drawn steel tube usually needs to be drawn many times, and corresponding stress relief annealing should be carried out between each drawing to ensure the next cold-drawn smoothly. From the appearance, cold-rolled seamless steel tubes are often small diameter, hot-rolled seamless steel tubes are often large diameter. 冷轧无缝钢管的精度高于热轧无缝钢管，价格也高于热轧无缝钢管。冷拔无缝管一般口径较小，大多在127mm以下，特别是冷拔无缝管外径的精度非常高，冷拔无缝管长度一般要短于热轧无缝管。壁厚方面冷拔无缝管要比热轧无缝管均匀。 The precision of cold-rolled seamless steel tube is higher than that of hot-rolled seamless steel tube, and the price is higher than that of hot-rolled seamless steel tube. The diameter of cold-drawn seamless tubes is generally smaller, mostly less than 127 mm. Especially, the precision of the outer diameter of cold-drawn seamless tubes is very high, and the length of cold-drawn seamless tubes is generally shorter than that of hot-rolled seamless tubes. The wall thickness of cold-drawn seamless tubes is more uniform than that of hot-rolled seamless tubes. |
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