? Wuxi Duorunde Steel Pipe Co., Ltd. (my answer); 16Mn precision steel pipe is a kind of low-alloy high-strength structural steel with high strength and toughness, which is suitable for manufacturing high-pressure hydraulic pipelines and other high-pressure occasions. The following is more information about 16Mn precision steel pipe manufacturing:

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1. smelting and continuous casting process?

1. raw material preparation: classify, clean and treat raw materials such as scrap steel, pig iron and ferroalloy to ensure the quality and purity of raw materials.

2. smelting: smelting with electric furnace or converter, melting raw materials into molten steel, and refining treatment such as desulfurization and dephosphorization at the same time to improve the purity of molten steel.

3. Continuous casting: pouring molten steel into a continuous casting machine to form a billet with a certain shape. In this process, temperature control and billet drawing speed adjustment are needed to ensure the quality and stability of the billet.

second, hot rolling and cold rolling processes

1. heating: the billet is heated to improve the temperature and plasticity of the billet and prepare for the subsequent rolling process.

2. hot rolling: the heated billet is hot rolled, and the diameter and wall thickness of the steel pipe are gradually reduced after multiple passes of rolling to form a preliminary steel pipe shape.

3. cold rolling: the hot rolled steel pipe is cold rolled, and the diameter and wall thickness of the steel pipe are further reduced through precise molds and equipment, so as to improve the accuracy and surface quality of the steel pipe.

4. finishing: finish the cold-rolled steel pipe, including straightening, nondestructive testing, surface treatment, etc., to ensure the quality and accuracy of the steel pipe.

Third, heat treatment process

1. Annealing: Annealing at a certain temperature to eliminate the stress inside the steel pipe and improve the plasticity and toughness of the steel pipe.

2. quenching: the steel pipe is heated to a certain temperature and then quenched to improve the hardness and wear resistance of the steel pipe.

3. Tempering: Tempering the quenched steel pipe to eliminate the internal stress generated during quenching and improve the stability and toughness of the steel pipe.

iv. surface treatment and packaging process

1. surface treatment: surface treatment of steel pipe, such as zinc plating and plastic spraying, to improve the corrosion resistance and aesthetics of steel pipe.

2. packaging: the treated steel pipe is packaged, and packaging materials and technologies suitable for transportation and storage are adopted to improve packaging efficiency and protection effect, and reduce transportation cost and breakage rate.

v. quality control and inspection process

1. quality planning: quality planning is carried out in the manufacturing process, quality control points and inspection methods are determined, and quality control plans and standards are formulated.

2. quality inspection: carry out quality inspection on each production link, including raw materials, smelting, continuous casting, hot rolling, cold rolling, heat treatment, surface treatment, etc., to ensure that the product quality meets the requirements.

3. disposal of nonconforming products: dispose and repair the nonconforming products to prevent the nonconforming products from flowing into the next link.

4. quality data analysis: classify and analyze the quality problems in the production process, find out the causes and solutions, and continuously improve the production process.

5. Quality system certification: pass the quality system certification, such as ISO91, to ensure the consistency and stability of product quality.

to sum up, the manufacturing process of 16Mn precision steel pipe includes smelting and continuous casting, hot rolling and cold rolling, heat treatment, surface treatment and packaging, quality control and inspection. Improving the production process through strict quality control and technological innovation in each link can improve product quality, reduce costs, improve production efficiency and market competitiveness.