The production process and quality control of CCS Grade DH36 steel is a key part of ensuring its compliance with CCS codes and standards. The following are the general production process and quality control steps:
1. Raw material preparation: Sourcing high quality billets from reliable suppliers as raw materials for CCS Grade DH36 steel.
2. Melting: The billet is placed in a high temperature furnace and is melted and refined to ensure that the composition meets the requirements of CCS Grade DH36 steel.
3. Continuous casting and rolling: Through continuous casting technology, the molten steel is poured into the forming mold to form a billet. The billet is then rolled and cooled using a rolling mill to obtain the desired thickness and geometry of CCS Grade DH36 steel.
4. Control cooling rate: In the rolling process, control cooling rate can affect the crystal structure and mechanical properties of steel. Proper cooling control ensures excellent hardness, toughness and weldability of CCS Grade DH36 steel.
5. Heat treatment: Heat treatment of the rolled sheet to adjust its structure and properties. Common heat treatment methods include normalizing, quenching and tempering to obtain the required strength and toughness.
6. Surface treatment: CCS Grade DH36 steel is treated with rust removal, shot blasting or coating to improve its corrosion resistance and appearance quality.
7. Quality control and testing: In the entire production process, strict quality control and testing. Including chemical composition analysis, mechanical properties testing, impact testing, hardness testing, ultrasonic testing, etc., to ensure that CCS Grade DH36 steel meets the requirements.
8. Certification and documentation: The manufacturer will submit the relevant test report to a third-party certification body to obtain the certification of CCS Grade DH36 steel, and keep the corresponding quality records and traceability information.
The above is a general CCS Grade DH36 steel production process and quality control steps, actual operation may vary by steel mill and production process. Manufacturers usually comply with international standards and CCS regulations to ensure that the reliability and quality of products meet the requirements of classification societies.
