The production process of SGCC steel typically includes the following steps and quality control measures:
1. Raw material preparation: Select appropriate raw materials, such as Hot rolled coil or cold rolled coil as the base material.
2. Hot rolling treatment: Through the rolling process at high temperature, the raw material is hot rolled (hot continuous rolling) to change its shape and size. In this step, parameters such as rolling temperature, rolling force and rolling speed need to be strictly controlled to ensure that products meet the requirements.
3. Pickling treatment: there may be oxides and impurities on the surface of the steel after hot rolling, so pickling treatment is carried out, and acid solution is used to remove the oxides and impurities on the surface.
4. Hot-dip galvanizing: Dip the acid-washed steel into the molten zinc for hot-dip galvanizing. The process is mainly divided into two stages: pretreatment and galvanizing. Pretreatment includes operations such as oil removal, oxygen removal and heat treatment to improve the adhesion of the steel surface. The steel is then dipped into a zinc bath to galvanize, forming a zinc coating.
5. Surface treatment: Sometimes, SGCC steel may also undergo additional surface treatment, such as passivation treatment, to improve corrosion resistance.
In terms of quality control, the production process of SGCC steel requires strict quality control measures, including but not limited to the following:
- Raw material inspection: chemical composition analysis of raw materials, physical properties testing, etc., to ensure that they comply with relevant standards and requirements.
- Online monitoring: Online monitoring in the production process, such as real-time monitoring of temperature, thickness, width and other parameters, as well as the detection of coating and galvanized layer, to ensure that the product meets the specified technical indicators.
- Sampling inspection: random samples are taken from the production line for physical property testing, coating thickness measurement, corrosion resistance testing, etc., to verify the quality of the product.
- Strict implementation of relevant standards: The production of SGCC steel needs to comply with relevant national or industry standards, such as China GB standard, international ISO standards, etc. By implementing these standards, product consistency and reliability are ensured.
- Process control and improvement: Continuously monitor and adjust parameters in the production process, identify potential problems and make improvements to improve product quality and production efficiency.
The above is an overview of the production process and quality control measures for SGCC steel in general. Specific production processes and quality control methods may vary depending on the manufacturer, national standards, etc.
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