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    您的位置:首頁 > 新聞動態 > 鋼管知識

    冷拔無縫鋼管和冷拔鋼管是不是一種?區別?

    發布日期:2019-07-01 瀏覽次數:158

    冷拔鋼管的生產方法主要是靠芯棒拔制來改變冷拔鋼管的外徑及厚度。外觀上冷拔無縫鋼管要短于熱軋無縫鋼管,冷拔無縫鋼管的壁厚一般比熱軋無縫鋼管要小,但是表面看起來比厚壁無縫鋼管加明亮,表面沒有太多的粗糙,口徑也沒有太多的毛刺。

    The production method of cold-drawn precision steel pipe mainly depends on mandrel drawing to change the outer diameter and thickness of cold-drawn steel pipe. The appearance of cold-rolled seamless steel tube is shorter than that of hot-rolled seamless steel tube. The wall thickness of cold-rolled seamless steel tube is generally smaller than that of hot-rolled seamless steel tube, but the surface looks brighter than that of thick-walled seamless steel tube. The surface is not too rough and the caliber is not too much burr.

    1、無芯棒拔制(拔制時只用拔管模不用芯棒)。

    1. Drawing without mandrel (drawing only with drawing die without mandrel).

    2、短芯棒拔制(拔制時用拔管模及軸向固定的長度不大的短芯棒)。

    2. Short mandrel drawing (drawing with drawing die and short mandrel with fixed axially length).

    3、長芯棒拔制(拔制時用拔管模及隨所拔鋼管一起移動的長度略大于管子長度的長芯棒)。

    3. Drawing of long mandrel (drawing with drawing die and long mandrel whose length is slightly longer than that of the tube when moving with the drawn steel pipe).

    4、游動芯棒拔制(拔制時用拔管模及不作軸向固定而能自行穩定地保持在變形區中的短芯棒)。

    4. Moving mandrel drawing (drawing with drawing die and short mandrel which can be stably maintained in the deformed zone without axial fixing).

    一般的冷拔無縫精密鋼管的生產工藝可以分為冷拔與熱軋兩種,冷軋無縫鋼管的生產流程一般要比熱軋要復雜,管坯首先要進行三輥連軋,擠壓后要進行定徑測試,如果表面沒有響應裂紋后圓管要經過割機進行切割,切割成長度約一米的坯料。

    The general production process of cold-drawn seamless precise steel tube can be divided into two kinds: cold-drawn and hot-rolled. The production process of cold-rolled seamless steel tube is generally more complicated than hot-rolled. First of all, the billet must be rolled three rolls continuously. After extrusion, the calibration test should be carried out. If the surface does not respond to cracks, the circular tube must be cut by cutting machine and grow. Billet with a degree of about one metre.

    然后進入退火流程,退火要用酸性液體進行酸洗,酸洗時要注意表面是否有大量的起泡產生,如果有大量的起泡產生說明鋼管的質量達不到相應的標準。

    Then enter the annealing process, annealing to acid liquid pickling, pickling should pay attention to whether there is a large number of bubbles on the surface, if there is a large number of bubbles, indicating that the quality of steel pipes can not meet the corresponding standards. 

    辛苦整理!轉載請注明來自 http://www.maksvelo.com/show.asp?id=78

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