2、精密鋼管是近幾年出現(xiàn)的產(chǎn)品，主要是內(nèi)孔、外壁尺寸有嚴格的公差及粗糙度。

2, precision steel pipe is a product of recent years, mainly the inner hole, outer wall size, strict tolerances and roughness.

冷拔精密鋼管的特點：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).鋼管橫面積更復雜。5).鋼管性能更優(yōu)越，金屬比較密。

Cold drawn precision steel pipe features: 1) less outer diameter. 2) high accuracy, small batch production. 3) cold finished products have high accuracy and good surface quality. 4) the transverse area of steel pipe is more complicated. 5) steel pipe performance is superior, metal more closely.

熱軋精密鋼管后的區(qū)別

The difference between 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(jīng)步進式加熱爐加熱，高壓水除鱗后進入粗軋機，粗軋料經(jīng)切頭、尾、再進入精軋機，實施計算機 控制軋制，終軋后即經(jīng)過層流冷卻和卷取機卷取、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。

With the continuous casting round billet slab or steel tubeshot rolledprecision steel as raw material, after reheating furnace heating, descaling into the roughing mill of high pressure water, roughing material by cutting head, tail, and then enter the finishing mill, the implementation of the computer controlled rolling and after rolling through the laminar cooling and coiling machine, coiling become straight hair volume. Hair straightenerrollhead, tail tongue shapeand thefishtail shape, thickness, width of poor accuracy, edgehaswavy, folding, tower and other defects. The coil weight is heavy, and the inner diameter of the steel coil is 760mm. Thestraightthroughcutting head cutting, cutting tail, cutting edge and multi pass straightening and leveling finishing line processing, cutting board or heavy volume, which becomes: hot rolled steel plate and flat steel coils, slittingstripand other products. Hot finishing rolling by pickling descaling and oil is made by pickling hot-rolled coils.