Inspection and quality control of marine flat bulb steel are important links in ensuring that products meet specifications and standards. The following are some key points regarding inspection and quality control of marine flat bulbs:
1. Appearance inspection: including inspection of surface quality, geometric dimensions, edge flatness, etc. to ensure compliance with design requirements.
2. Chemical composition analysis: Determine whether the composition of the material meets the requirements through chemical analysis, including element content and impurity content.
3. Mechanical property testing: Determine the tensile strength, yield strength, elongation and other mechanical performance indicators of marine flat bulb steel to ensure that it meets the design requirements.
4. Hardness test: Conduct a hardness test on marine flat bulb steel to evaluate whether the hardness level of the material meets the standard requirements.
5. Cold bending test: The cold bending test is performed to evaluate the plasticity and toughness of the material under low temperature conditions.
6. Metallographic structure analysis: Observe and analyze the metallographic structure of marine flat spherical steel to evaluate the quality of grain size, grain boundary clarity, etc.
7. Ultrasonic testing: Use ultrasonic technology to detect internal defects and foreign objects in marine flat bulb steel to ensure the quality of the product is intact.
8. Corrosion test: Carry out salt spray test or other corrosion test to evaluate the corrosion resistance of marine flat bulb steel.
9. Certification and standards: Ensure that marine flat bulb steel meets relevant classification society standards or international certification requirements, such as LR, DNVGL, ABS, etc.
10. Quality records: record all inspection results and quality control processes, and establish quality files and traceability systems.
The above inspection and quality control steps help ensure that the quality of marine flat bulb steel meets standards and design requirements, thereby improving the safety and reliability of ship structures.
