Wuxi Duorunde Steel Pipe Co., Ltd. (my answer); There are certain differences in the manufacturing of 15CrMo alloy pipes, fine-drawn precision pipes and cold-drawn precision pipes. The following will introduce their manufacturing processes and characteristics respectively:?
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1. 15CrMo material alloy pipe? 15CrMo material alloy pipe is a It is widely used in alloy pipes under high temperature and high pressure environments and has excellent mechanical properties and corrosion resistance. Its manufacturing process mainly includes the following steps:?
(1) Smelting: Using smelting equipment such as electric furnaces or converters to smelt iron, chromium, manganese and other alloying elements into molten steel.
(2) Continuous casting: Pour molten steel into the continuous casting machine for solidification and shaping to form a steel billet.
(3) Rolling: The steel billet is heated and rolled in multiple passes to gradually reduce the diameter of the billet and improve the organizational structure, and finally form a steel pipe with the required diameter.
(4) Heat treatment: Heating and cooling the steel pipe to adjust its mechanical properties and corrosion resistance.
(5) Surface treatment: Surface treatments such as cleaning, pickling, and shot blasting are performed on steel pipes to remove oxide scale, welding slag and other impurities and improve corrosion resistance.
2. Precision drawn precision tube? Precision drawn precision tube is an alloy pipe made through precision drawing process. It has the advantages of high precision, high strength and high corrosion resistance. Its manufacturing process mainly includes the following steps:
(1) Smelting: Use smelting equipment such as vacuum induction furnace or electroslag remelting furnace to smelt iron, chromium, manganese and other alloying elements into molten steel.
(2) Continuous casting: Pour molten steel into the continuous casting machine for solidification and shaping to form a steel billet.
(3) Heating: The steel billet is heated to adjust its structure and properties.
(4) Precision drawing: The heated steel billet is precision drawn to gradually reduce the diameter of the billet and improve the organizational structure, and finally form a steel pipe with the required diameter.
(5) Heat treatment: Heating and cooling the steel pipe to adjust its mechanical properties and corrosion resistance.
(6) Surface treatment: Surface treatments such as cleaning, pickling, and shot blasting are performed on steel pipes to improve corrosion resistance and surface quality.
3. Cold-drawn precision tube? Cold-drawn precision tube is an alloy tube made by cold drawing process. It has the advantages of high strength, high precision and low deformation resistance. Its manufacturing process mainly includes the following steps:
(1) Smelting: Using smelting equipment such as electric furnaces or converters to smelt iron, chromium, manganese and other alloying elements into molten steel.
(2) Continuous casting: Pour molten steel into the continuous casting machine for solidification and shaping to form a steel billet.
(3) Heating: The steel billet is heated to adjust its structure and properties.
(4) Cold drawing: The heated steel billet is cold drawn to gradually reduce the diameter of the billet and improve the organizational structure, and finally form a steel pipe with the required diameter.
(5) Heat treatment: Heating and cooling the steel pipe to adjust its mechanical properties and corrosion resistance.
(6) Surface treatment: Surface treatments such as cleaning, pickling, and shot blasting are performed on steel pipes to improve corrosion resistance and surface quality.
In summary, there are certain differences in the manufacturing processes and characteristics of 15CrMo alloy tubes, precision drawn precision tubes and cold drawn precision tubes. Among them, the manufacturing process of precision drawn precision tubes is the most complex and the requirements are the highest, so its quality and performance are relatively good. The manufacturing process of cold-drawn precision tubes is relatively simple, but requires strict control of deformation resistance and accuracy.