精密鋼管和冷拔無縫鋼管的區(qū)別

1、冷拔無縫鋼管主要特點是無焊接縫，可承受較大的壓力。產(chǎn)品可以是很粗糙的鑄態(tài)或冷撥件。精密鋼管是近幾年出現(xiàn)的產(chǎn)品，主要是內(nèi)孔、外壁尺寸有嚴(yán)格的公差及粗糙度。

1, the main feature of cold drawn seamless steel pipe is no welded joints, which can withstand greater pressure. Products can be coarse cast or cold parts. Precision steel pipe is a product that appears in recent years. It is mainly due to the strict tolerance and roughness of inner hole and outer wall.

2、冷拔無縫鋼管的特點：1).外徑更小。2).精度高可做小批量生。3).冷拔成品精度高，表面質(zhì)量好。4).鋼管橫面積更復(fù)雜。5).鋼管性能更優(yōu)越，金屬比較密。

2. Features of cold drawn seamless steel pipe: 1) smaller outside diameter. 2). High precision can be used for small batch production. 3) cold drawn products have high accuracy and good surface quality. 4) the cross section of steel pipe is more complicated. 5) the steel pipe has better performance and the metal is more dense.

熱軋精密鋼管后的區(qū)別

The difference between hot-rolled and precision steel pipe

熱軋精密鋼管用連鑄圓管坯板坯或初軋板坯作原料，經(jīng)步進(jìn)式加熱爐加熱，高壓水除鱗后進(jìn)入粗軋機(jī)，粗軋料經(jīng)切頭、尾、再進(jìn)入精軋機(jī)，實施計算機(jī) 控制軋制，終軋后即經(jīng)過層流冷卻和卷取機(jī)卷取、成為直發(fā)卷。直發(fā)卷的頭、尾往往呈舌狀及魚尾狀，厚度、 寬度精度較差，邊部常存在浪形、折邊、塔形等缺陷。其卷重較重、鋼卷內(nèi)徑為760mm。將直發(fā)卷經(jīng)切頭、 切尾、切邊及多道次的矯直、平整等精整線處理后，再切板或重卷，即成為：熱軋鋼板、平整熱軋鋼卷、縱切帶等產(chǎn)品。熱軋精整卷若經(jīng)酸洗去除氧化皮并涂油后即 成熱軋酸洗板卷。

Hot-rolled precision steel tube is made of continuous casting round tube slab or blooming slab, heated by walking-beam furnace, descaled by high-pressure water and then entered roughing mill. The roughing material is cut, tailed and then entered finishing mill, and controlled by computer. After finishing rolling, it passes through laminar cooling and coiling mill, and becomes direct coil. The head and tail of straight hair curl are often tongue-shaped and fishtail-shaped, and the accuracy of thickness and width is poor. There are often wave-shaped, folded edge, tower-shaped defects in the edge. The coil weight is heavier and the inner diameter of the coil is 760mm. The direct-hair coil is processed by cutting head, cutting tail, cutting edge, multi-pass straightening, leveling and other finishing lines, and then the plate or rewinding is turned into: hot-rolled steel plate, leveling hot-rolled coil, longitudinal cutting strip and other products. The hot-rolled finishing coil should be pickled to remove the oxide scale and then become the hot rolled pickling coil after finishing the oil.