? # Car manufacturing? # Military? # Machining? # Electronic equipment? # Medical equipment # Construction machinery? # Railway locomotive? # Aerospace? # Ship # Injection molding machine? # Die casting machine? # Machine tool processing? # Diesel Engine # Petrochemical? # Power station? # Boiler equipment?
First, smelting and continuous casting The manufacturing of 40Cr precision seamless tube needs smelting and continuous casting first. In this process, the impurities and gases in molten iron are removed by smelting with electric furnace or converter, and appropriate alloying elements are added to obtain the required chemical composition. Then the molten iron is poured into a continuous casting machine for continuous casting to form a billet.
2. Hot rolling and cold rolling are two important links in the manufacturing process of 40Cr precision seamless tube. Hot rolling is to heat the billet to a high temperature and then roll it to obtain a tube blank with a certain shape and size. Cold rolling is to roll the tube blank at room temperature to further refine and refine the dimensional accuracy and surface quality of the tube.
In the hot rolling process, it is necessary to heat the billet to reduce its hardness and improve its plasticity. At the same time, in order to prevent oxidation and decarbonization, protective measures must be taken, such as coating or using protective gas. In the cold rolling process, it is necessary to use high-precision and high-rigidity rolling mill equipment to obtain higher dimensional accuracy and surface quality.
3. Straightening and NDT straightening are important links in the manufacturing process of 40Cr precision seamless tube, which are used to eliminate the bending and twisting defects of pipes during rolling. Straightening can use mechanical straightener or hydraulic straightener. Non-destructive testing is used to detect internal and external quality defects and damages of pipelines to ensure the quality and reliability of products.
Fourth, heat treatment and surface treatment? Heat treatment is a key link in the manufacturing process of 40Cr precision seamless tube, which is used to improve the strength and hardness of pipes and improve their processability. Generally, quenching, tempering and other processes are used for treatment. Surface treatment is used to improve the corrosion resistance and aesthetics of pipes, which can be treated by polishing, wire drawing, plastic spraying and other processes.
Verb (abbreviation for verb) quality inspection and control? In the manufacturing process of 40Cr precision seamless tube, strict quality inspection and control are needed to ensure the quality and reliability of products. Generally, appearance inspection, size inspection and mechanical performance inspection are needed. At the same time, it is necessary to monitor all links in the production process to ensure the stability and consistency of the production process. ? In a word, the manufacturing process of 40Cr precision seamless tube has the characteristics of high precision, high flatness, high strength and good processability. The manufacturing process needs to be treated and controlled by smelting, continuous casting, hot rolling, cold rolling, straightening, nondestructive testing, heat treatment, surface treatment, quality inspection and other processes. The treatment and control of these processes have a vital impact on the quality and reliability of products. At the same time, the manufacturing process has a high degree of automation and can realize continuous and efficient production.