Marine container forgings need to withstand a variety of forces and environmental impacts during use, so non-destructive testing and quality control methods are important means to ensure its reliability and safety. This paper introduces the common non-destructive testing methods and quality control measures of Marine container forgings.
I. Non-destructive detection method
- Ultrasonic Testing (UT) : Ultrasonic testing is a commonly used non-destructive testing method for Marine container forgings. By introducing the ultrasonic wave into the material to be tested, the propagation and reflection characteristics of the sound wave are used to detect the internal defects of the material, such as cracks, interlayers, etc. Ultrasonic inspection enables comprehensive inspection of the material and provides detailed information about the size, location and shape of the defect.
- Magnetic Particle Testing (MT) : Magnetic particle testing is a non-destructive testing method suitable for detecting surface and near-surface cracks. By applying a magnetic field on the surface of the material to be detected, and applying magnetic powder on the surface, when there is a crack, magnetic field disturbance will occur at the crack, and magnetic powder will gather on the crack to form visible magnetic powder spots, so as to realize the detection of cracks.
- Eddy Current Testing (ET) : Eddy current testing is a non-destructive testing method suitable for detecting surface defects of metal conductive materials. By applying an alternating electromagnetic field to the surface of the material to be detected, when there is a surface defect, the eddy current changes will be caused, and the presence and location of the defect can be detected.
- Visual Testing (VT) : Visual testing is a simple and intuitive non-destructive detection method, suitable for detecting surface visible defects, such as cracks, interlayers, bubbles, etc. The surface of the material being tested is examined in detail by visual observation, using a microscope and other tools to find surface defects and assess their impact on the strength and reliability of the material.
- Quality control methods
- Raw material traceability: Raw material selection and control of Marine container forgings is a key link to ensure product quality. The traceability of raw materials is required to ensure that materials are reliably sourced and comply with relevant standards and specifications.
- Process control: In the manufacturing process of Marine container forgings, strictly control the process parameters of each link, such as forging temperature, forging strength, heating temperature, etc., to ensure that the dimensional accuracy and mechanical properties of the product meet the design requirements.
- Heat treatment control: Heat treatment is an important link in the manufacturing process of Marine container forgings. Through reasonable heat treatment process and control parameters, such as heating temperature, cooling rate, the ideal structure and mechanical properties can be obtained.
- Surface treatment: The surface treatment of Marine container forgings has an important impact on the corrosion resistance and beauty of the product. Common surface treatment methods include shot peening, pickling, coating, etc. It is necessary to choose the appropriate surface treatment method according to different needs.
- Quality inspection control: Quality inspection in the production process is an effective means to ensure the quality of Marine container forgings. Through the development of reasonable inspection plans and methods, the forging appearance inspection, size detection, mechanical property testing, etc., to ensure that the product meets the relevant standards and specifications.
In summary, the non-destructive detection and quality control method of Marine container forgings is an important link to ensure product quality. The reliability and safety of Marine container forgings can be effectively ensured by using appropriate non-destructive testing methods for comprehensive inspection of forgings, combined with measures such as process control, heat treatment control, surface treatment and quality inspection control, and at the same time meet the requirements of relevant standards and specifications.
