1. Material? Cold-drawn precision steel pipes are usually made of metal materials such as carbon steel, alloy steel or stainless steel. Because of its uniform material, good stability, high hardness, high strength and high wear resistance, it is widely used in manufacturing mechanical parts, automobile parts, aviation parts, ship parts and other fields. Cold-rolled precision pipe is mainly made of steel plate or steel strip after cold rolling. Due to the large thickness, the hardness and strength are relatively low, but the surface smoothness and dimensional accuracy are excellent. Suitable for manufacturing high-precision tools, injection molds, antenna brackets and other fields.
# Automobile manufacturing piping? # Military? # Construction machinery? # Railway locomotive? # Aerospace? # Ship # Injection molding machine? # Die casting machine? # Machine tool processing? # Diesel Engine # Petrochemical? # Power station? # Boiler equipment
2. Production technology? Cold-drawn precision steel pipes are mainly obtained by cold drawing for many times, and the reduction of each process is generally controlled at about 1%, which can not only improve the internal structure and physical properties of the pipes, but also improve the shape accuracy and surface quality. ? Cold-rolled precision pipes are mainly obtained by forming, welding, internal and external derusting, drilling and other processes. In the production process, temperature and process parameters need to be strictly controlled to ensure the dimensional accuracy and surface smoothness of pipes.
3. Surface finish? The surface smoothness of cold-drawn precision steel pipe is good, which can meet the requirements below Ra 0.4 μ m.. However, due to the unsmooth metal streamline on the surface, defects such as burr and peeling may appear on the surface. ? On the other hand, the surface smoothness of cold-rolled precision tubes is high, which can reach Ra0.2μm or even lower, but its surface defects are relatively few.
4. Application field? Because of its high hardness and strength, cold-drawn precision steel pipe is more suitable for manufacturing mechanical parts with high strength and wear resistance, such as automobile engine bearings and non-standard threads. Cold-rolled precision tubes are more suitable for manufacturing high-precision tools, injection molds, antenna frames and other fields because of their good surface smoothness and dimensional stability. ? In a word, although cold-drawn precision steel pipes and cold-rolled precision pipes are both metal pipes for manufacturing mechanical parts, due to the differences in materials, production processes and surface finish, different specifications and models of pipes should be selected according to actual needs.