? Wuxi Duorunde Steel Tube Co., Ltd (My Answer); Alloy precision steel tubes, seamless precision alloy steel tubes and precision seamless alloy steel tubes in the manufacturing process there are some differences. The following will introduce their manufacturing process respectively:?
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1. Alloy precision steel tube manufacturing process Alloy precision steel tube is a kind of steel tube produced by hot extrusion or cold rolling and other methods, with high precision, high strength, high corrosion resistance and other characteristics. Its manufacturing process mainly includes the following links:?
(1) Smelting: According to the material and performance requirements of the alloy precision steel pipe to be produced, select the appropriate alloying elements and raw materials for smelting. The smelting process needs to strictly control the chemical composition, impurity content and other indicators.
(2) continuous casting: the smelted steel is poured into the continuous casting machine for solidification molding, forming billets. Continuous casting process needs to control the temperature, speed and other parameters to ensure the quality and performance of the billet.
(3) heating: the billet into the heating furnace to a certain temperature, in order to prepare for extrusion or cold rolling. The heating speed and temperature need to be controlled during the heating process to avoid cracks and other defects in the billet.
(4) Extrusion or cold rolling: according to the product specifications and requirements, select the appropriate extrusion or cold rolling process parameters, extrusion or cold rolling production. Extrusion or cold rolling process needs to control the amount of deformation, speed and other parameters to ensure that the shape and dimensional accuracy of the steel pipe.
(5) Cooling: the tube will be extruded or cold rolled after cooling treatment to eliminate internal stress. The cooling process needs to control the cooling speed and temperature to avoid cracks and other defects in the steel pipe.
(6) Straightening: The cooled steel pipe is straightened to eliminate bending and twisting. The straightening process needs to control the straightening temperature and pressure to ensure the straightness and precision of the steel pipe.
(7) Quality Inspection: The quality inspection of the steel pipe includes the inspection of dimensional accuracy, surface quality, metallurgy and other aspects. The subsequent processing can only be carried out after passing the test.
(8) Packing: The tested alloy precision steel tubes are packed to prevent rust and pollution. Before packing, it is necessary to carry out anti-rust treatment, such as coating anti-rust oil.
2.? Manufacturing process of seamless precision alloy steel tube Seamless precision alloy steel tube is a kind of steel tube produced by piercing, rolling and other processes, which is characterized by good overall performance and high precision. Its manufacturing process mainly includes the following links:
(1) Smelting: similar to the smelting process of alloy precision steel tubes, the smelting of seamless precision alloy steel tubes also needs to control the chemical composition, impurity content and other indicators. At the same time, according to the product specifications and requirements, need to choose the appropriate steel grade and material.
(2) continuous casting: the smelting of steel into the continuous casting machine for solidification molding, forming billets. Continuous casting process needs to control the temperature, speed and other parameters to ensure the quality and performance of the billet.
(3) heating: the billet will be put into the heating furnace heated to a certain temperature, in order to prepare for piercing. The heating speed and temperature need to be controlled during the heating process to avoid cracks and other defects in the billet.
(4) Piercing: According to the product specifications and requirements, select the appropriate piercing process parameters for piercing production. The piercing process needs to control the piercing speed and temperature to ensure the shape and quality of the steel pipe.
(5) Rolling: The perforated steel pipe is rolled to obtain the required shape and size. Rolling temperature and deformation need to be controlled during the rolling process to ensure the shape and size accuracy of the steel pipe.