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1. Material selection? Both alloy precision steel pipe and 304 stainless steel precision pipe have certain requirements in material selection. For alloy precision steel pipes, it is necessary to choose alloy steel materials with high strength and corrosion resistance, such as stainless steel and titanium alloy. For 304 stainless steel precision pipe, it is necessary to choose 304 stainless steel material with excellent corrosion resistance and processability. When selecting materials, it is necessary to consider the chemical composition, mechanical properties and corrosion resistance of the materials to ensure that the manufactured precision steel pipes meet the requirements. ?
2. Manufacturing process? The manufacturing process of alloy precision steel pipe and 304 stainless steel precision pipe is different, but the following points should be noted:
(1) smelting and continuous casting: raw material composition and smelting process should be controlled to ensure the purity and chemical composition of molten steel meet the requirements. At the same time, the temperature, speed and cooling system should be well controlled in the continuous casting process to prevent cracks, blowholes and other defects.
(2) Rolling: Rolling is one of the key steps in manufacturing precision steel pipes. It is necessary to control the pressure, temperature, speed and other parameters of the rolling mill to ensure the dimensional accuracy and mechanical properties of the steel pipe. At the same time, attention should be paid to prevent the surface of steel pipe from being scratched or folded.
(3) Heat treatment: Heat treatment is a key step to improve the mechanical properties and corrosion resistance of precision steel pipes, and it is necessary to control the parameters such as heating temperature, holding time and cooling rate. At the same time, attention should be paid to prevent overheating, oxidation or deformation and other defects.
(4) Finishing and straightening: The steel pipe after heat treatment needs finishing and straightening to eliminate its surface defects and internal stress and ensure the accuracy and straightness of the steel pipe. Attention should be paid to prevent excessive straightening, insufficient straightening or uneven straightening when straightening.
(5) NDT: NDT must be carried out on the manufactured precision steel pipe to ensure that there are no defects or damages on its surface and inside. Attention should be paid to the selection of appropriate detection methods and equipment and the operation in strict accordance with the detection standards.
3. Equipment and personnel requirements
Manufacturing precision steel pipes requires high-precision and high-efficiency equipment and professional technicians. The requirements for equipment and personnel have a vital impact on the quality and performance of the manufactured precision steel pipe. Therefore, manufacturers need to choose advanced manufacturing equipment and technology, and strengthen the training and management of technicians to improve manufacturing efficiency and product quality.
4. Quality control and inspection? Strict quality control and inspection are needed in the manufacturing process to ensure that the manufactured precision steel pipe meets the requirements. It is necessary to monitor and record the quality of each production link, and carry out inspection items such as appearance inspection, size inspection and mechanical performance test on the manufactured precision steel pipe to ensure that its quality and performance meet the requirements. At the same time, unqualified products need to be reworked or scrapped to prevent unqualified products from entering the market. ? When manufacturing alloy precision steel pipes and 304 stainless steel precision pipes, attention should be paid to material selection, manufacturing technology, equipment and personnel requirements, quality control and inspection. Only by strictly checking and controlling the quality of each link can we manufacture high-quality and high-performance precision steel pipes.