1.Precision drawn tube
It is cold drawn seamless tubing, which is to draw the metal pipe with a cold drawing machine without heating. The advantage is that it does not need to be carried out at high temperature. The disadvantage is that the residual stress is large, and it cannot be drawn too long. Cold drawing can improve toughness and tensile strength to obtain better mechanical properties.
Cold drawn seamless steel pipe process:
Round tube blank→heating→perforation→heading→annealing→pickling→multi-pass cold drawing→semi-finished pipe→heat treatment→straightening→hydraulic test (flaw detection)→marking→storage.
The difference between cold drawing and cold drawing:
Cold drawing and cold drawing are two different methods of metal cold working, and the two are not the same concept. Cold drawing refers to the method of applying tension to both ends of the metal material to cause the material to produce tensile deformation. Cold drawing refers to the method of applying a pulling force on one end of the material to make the material pull out through a die hole. The diameter of the die hole is smaller than the diameter of the material. The cold drawing process causes the material to have extrusion deformation in addition to the tensile deformation, and the cold drawing process is generally carried out on a special cold drawing machine. Materials that have been cold drawn have better properties than those that have been cold drawn.
The main application of cold-drawn seamless steel pipes: for automobiles, motorcycles, refrigeration equipment, hydraulic parts, pneumatic cylinders, and other products that have high requirements for steel pipe precision, smoothness, cleanliness, and mechanical properties.
2. Finish rolling
Finish-rolled pipe is also called cold-rolled precision steel pipe, which is a production process of seamless pipe.
Features of finish rolled tube:
1. The cold-rolled precision steel pipe has high tolerance and dimensional accuracy, and the product accuracy is controlled at ±0.05mm. The inner and outer walls have a good finish and there is no oxide layer on the surface.
2. The comprehensive performance of cold-rolled precision steel pipe is excellent, can withstand high pressure, cold-bending, flaring, flattening without cracking, no wrinkling, and can do various complex deformation and mechanical processing.
3. The promotion and application of precision seamless pipes can save steel, improve processing efficiency, and reduce processing procedures and equipment investment. It can save costs and greatly save machining hours, increase production volume and material utilization rate, and help improve product quality and reduce costs.
The use of finishing tube:
Cold-rolled precision steel pipes are widely used in automobiles, motorcycles, electric vehicles, pneumatic cylinders, petrochemicals, electric power, ships, aerospace, bearings, pneumatic components, medium and low pressure boilers and other fields.
It is cold drawn seamless tubing, which is to draw the metal pipe with a cold drawing machine without heating. The advantage is that it does not need to be carried out at high temperature. The disadvantage is that the residual stress is large, and it cannot be drawn too long. Cold drawing can improve toughness and tensile strength to obtain better mechanical properties.
Cold drawn seamless steel pipe process:
Round tube blank→heating→perforation→heading→annealing→pickling→multi-pass cold drawing→semi-finished pipe→heat treatment→straightening→hydraulic test (flaw detection)→marking→storage.
The difference between cold drawing and cold drawing:
Cold drawing and cold drawing are two different methods of metal cold working, and the two are not the same concept. Cold drawing refers to the method of applying tension to both ends of the metal material to cause the material to produce tensile deformation. Cold drawing refers to the method of applying a pulling force on one end of the material to make the material pull out through a die hole. The diameter of the die hole is smaller than the diameter of the material. The cold drawing process causes the material to have extrusion deformation in addition to the tensile deformation, and the cold drawing process is generally carried out on a special cold drawing machine. Materials that have been cold drawn have better properties than those that have been cold drawn.
The main application of cold-drawn seamless steel pipes: for automobiles, motorcycles, refrigeration equipment, hydraulic parts, pneumatic cylinders, and other products that have high requirements for steel pipe precision, smoothness, cleanliness, and mechanical properties.
2. Finish rolling
Finish-rolled pipe is also called cold-rolled precision steel pipe, which is a production process of seamless pipe.
Features of finish rolled tube:
1. The cold-rolled precision steel pipe has high tolerance and dimensional accuracy, and the product accuracy is controlled at ±0.05mm. The inner and outer walls have a good finish and there is no oxide layer on the surface.
2. The comprehensive performance of cold-rolled precision steel pipe is excellent, can withstand high pressure, cold-bending, flaring, flattening without cracking, no wrinkling, and can do various complex deformation and mechanical processing.
3. The promotion and application of precision seamless pipes can save steel, improve processing efficiency, and reduce processing procedures and equipment investment. It can save costs and greatly save machining hours, increase production volume and material utilization rate, and help improve product quality and reduce costs.
The use of finishing tube:
Cold-rolled precision steel pipes are widely used in automobiles, motorcycles, electric vehicles, pneumatic cylinders, petrochemicals, electric power, ships, aerospace, bearings, pneumatic components, medium and low pressure boilers and other fields.
