精密鋼管和冷拔無縫鋼管的區別

冷拔無縫鋼管主要特點是無焊接縫，可承受較大的壓力。產品可以是很粗糙的鑄態或冷撥件。2、精密鋼管是近幾年出現的產品，主要是內孔、外壁尺寸有嚴格的公差及粗糙度。冷拔鋼管的特點：1).外徑更小。2).精度高可做小批量生。3).冷拔成品精度高，表面質量好。4).鋼管橫面積更復雜。5).冷拔鋼管性能更優越，金屬比較密。
1. The main characteristic of cold-drawn seamless steel pipe is that it has no welding seam and can withstand large pressure. Products can be very rough as-印花地坪cast or cold-dialed parts. 2. Precision steel pipe is a product appearing in recent years. It mainly has strict tolerance and ro透水地坪ughness for inner hole and outer wall dimensions. The characteristics of cold-drawn steel pipe: 1) smaller outer diameter. 2. High precision can be used for small batch production. 3. Cold-drawn products have high precision and good surface quality. 4. The transverse area of steel tube is more complex. 5. Steel pipe has better performance and denser metal. 熱軋精密鋼管後的區別
Differentiation of Hot Rolled 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，經步進式加熱爐加熱，高壓水除鱗後進入粗軋機，粗軋料經切頭、尾、再進入精軋機，實施計算機 控制軋制，終軋後即經過層流冷卻和卷取機卷取、成為直發卷。直發卷的頭、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、鋼卷內徑為760mm。將直發卷經切頭、 切尾、切邊及多道次的矯直、平整等精整線處理後，再切板或重卷，即成為：熱軋鋼板、平整熱軋鋼卷、縱切帶等產品。熱軋精整卷若經酸洗去除氧化皮並塗油後即 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 heating furnace, descaling by high pressure water and entering rough rolling mill. Rough rolling material is cut, tailed and re-entered into finishing mill. Computer controlled rolling is implemented. After finishing rolling, it is cooled by laminar flow and coiled by coiler and becomes direct hair coil. The head and tail of straight hair curls are usually tongue-like and fish-tail-like, and the accuracy of thickness and width is poor. The edges of straight hair curls are often corrugated, folded and tower-shaped. The coil weight is heavy and the inner diameter of the coil is 760 mm. After the straight hair coil is treated by cutting head, cutting tail, trimming edge, multi-pass straightening and leveling, and then cut or re-coil, it becomes hot rolled steel plate, flat hot rolled steel coil, longitudinal cut strip and other products. Hot-rolled finish coil will be hot-rolled pickled coil if the oxide scale is removed by pickling and oiled.