Precision steel pipe manufacturing process

Is a cold drawn or after hot rolling process of a kind of high precision steel tube material. Because of the precision steel tube inside and outside wall without oxidation layer, under high pressure without leakage, high precision, high finish, cold bending deformation, flaring, flattening without cracks a bit, it is mainly used to produce pneumatic or hydraulic components products, such as a cylinder or cylinder, can be a seamless steel pipe, welded pipe. The chemical composition of precision steel tube with carbon sulfur C, Si, Si, Mn, Mn, S, P, P, chromium Cr.

 

The pronunciation of precision steel pipe

 

China: j ǐ ng ā ng gu mi g m: n Spain: tubo preciso DE acero French: le tube d acier DE precision

 

The difference between precision steel pipe and seamless pipe

 

1, seamless steel pipe main characteristic is a welding seam, can withstand greater pressure. Products can be very rough as-cast or cold dial. 2, precision steel pipe is the product appeared in recent years, mainly is the inner hole, the size of the outer wall with strict tolerance and roughness.

 

The characteristics of cold drawn precision steel pipe

 

1. The outer diameter smaller. 2. High precision can be born small batch 3. Cold drawn finished products of high precision, good surface quality. 4. The steel pipe transverse area is more complex. 5. Steel pipe is superior performance, dense metal.

 

The difference between after hot rolling precision steel pipe

 

Hot rolled precision tube with the slab or slab continuous casting round billet as a raw material, by step heating furnace, high pressure water descaling after entering the roughing mill, roughing expected by the cutting head, tail, and then into the finishing mill, and the implementation of computer control rolling and finishing after through laminar cooling and the winder, become straight hair volume. Straight hair volume of head and tail often show tongue shape and fish shape, thickness and width accuracy is poorer, side often exists defects such as wave shape, folding, tower. The volume weight is heavier, coil diameter is 760 mm. To pass through the cutting head and cutting tail straight hair volume, trimming and straightening, level off of multichannel time after finishing line processing, cutting board or heavy volume, again become namely: hot rolled steel plate, flat hot-rolled coil, slitting and belt and other products. Hot rolling finishing if volume after acid pickling to remove scale and greased the hot-rolled pickling plate volumes.

 

Precision steel pipe commonly used specifications

 

10 # 0.07 ~ 0.13 ~ 0.37 0.07 0.35 0.65 0.035 0.035 or less or less 20 # 0.17 ~ 0.23 0.17 0.37 0.35 0.65 0.035 0.035 or less or less 35 # 0.32 ~ 0.39 0.17 0.37 0.35 0.65 0.035 0.035 or less or less 45 # 0.42 ~ 0.50 0.17 0.37 0.50 0.80 0.035 0.035 or less or less 40 cr 0.37 ~ 0.44 ~ 0.37 0.37 0.50 0.80 0.035 0.035 0.08 ~ 1.10 or less or less 25 mn 0.22 ~ 0.2 ~ 0.37 0.22 0.70 1.00 0.035 0.035 0.25 or less or less or less 37 mn5 0.30 ~ 0.39 0.15 ~ 0.30 1.20 1.50 0.015 0.020 or less or less