With the continuous development of shipbuilding industry, the quality requirements of port machinery forgings are becoming higher and higher. As one of the quality control methods of modern manufacturing industry, nondestructive testing (NDT) plays an important role in the manufacturing process of port machinery forgings. This paper will introduce the application of nondestructive testing technology in the manufacture of mechanical forgings in ship ports, in order to improve the quality and reliability of forgings.
Non-destructive testing technology refers to the detection of defects, abnormalities or performance changes inside or on the surface of the object by physical or chemical methods without affecting the performance of the object being tested, so as to obtain the quality information of the object being tested. Non-destructive testing technology includes X-ray testing, ultrasonic testing, magnetic particle testing, eddy current testing, infrared testing and other methods.
Non-destructive testing technology has a wide range of applications and is suitable for quality control in various industrial manufacturing fields, such as aviation, aerospace, nuclear industry, automobile, Marine, electric power, medical and other industries. Non-destructive testing technology can not only detect defects and anomalies, but also evaluate the performance of materials and components, which provides an important basis for quality control in the production process.
Ship port machinery forging is an important part of ship machinery equipment, the quality control in its manufacturing process has an important impact on the performance and safety of the whole ship. Non-destructive testing technology has the following applications in the manufacture of ship port machinery forgings:
Radiographic inspection
X-ray inspection is a method of detecting defects and anomalies by observing changes in transmitted or scattered rays by irradiating the object being detected with X-rays or gamma rays. In the manufacture of mechanical forgings in ship ports, X-ray detection can be used to detect cracks, pores, inclusions and other defects inside the forgings to improve the quality and reliability of the forgings.
Ultrasonic detection
Ultrasonic detection is a method to detect internal defects and anomalies of objects by using the principle of reflection of high-frequency sound waves. In the manufacture of mechanical forgings in ship ports, ultrasonic detection can be used to detect cracks, pores, porosity and other defects inside the forgings, and can also measure the thickness of the forgings and evaluate the material, providing a basis for quality control in the production process.
Magnetic particle detection
Magnetic particle detection is a method to detect surface and near-surface defects by using the magnetic principle. In the manufacture of mechanical forgings in ship ports, magnetic particle detection can be used to detect cracks, folds, inclusions and other defects on the surface of forgings to improve the quality and safety of forgings.
In the manufacture of ship port machinery forgings, the application of non-destructive testing technology includes the following links:
Manufacturing process: In all aspects of forging manufacturing, such as melting, molding, heat treatment, etc., non-destructive testing of raw materials is required to ensure the quality and reliability of raw materials. After the forging processing is completed, a comprehensive non-destructive testing is carried out to ensure that the quality of the finished product meets the requirements.
Testing method: According to the material, structure and manufacturing process of the forging and other factors, choose the appropriate non-destructive testing method. For example, X-ray detection is suitable for detecting defects such as internal cracks and pores, ultrasonic detection is suitable for detecting defects such as internal cracks and porosity, and magnetic particle detection is suitable for detecting defects such as surface cracks and inclusions.
Judgment criteria: For each nondestructive testing method, the corresponding judgment criteria must be developed to determine the nature, location and size of the defect. According to the judgment criteria, the defects are divided into qualified products, repaired products and waste products to ensure the quality and reliability of the forgings.
With the continuous progress of science and technology and the development of manufacturing industry, non-destructive testing technology will play an increasingly important role in the manufacture of ship port machinery forgings. In the future, non-destructive testing technology will develop in the following directions:
Intelligent: The use of artificial intelligence and machine learning and other technologies to achieve the automation and intelligence of non-destructive testing technology, improve the efficiency and accuracy of testing.
Compound: Combine a variety of non-destructive testing technologies to achieve complementary advantages and improve the detection rate and reliability of defects.
Refinement: The development of more refined non-destructive testing techniques to reveal changes in microstructure and properties inside materials and components at a smaller scale.
Green environmental protection: pay attention to environmental protection and energy saving, the development of low-dose, low-energy consumption, low-pollution non-destructive testing technology, reduce the harm to the environment and personnel.
In short, with the continuous progress of technology and the expansion of application fields, non-destructive testing technology will play an increasingly important role in the manufacture of mechanical forgings in ship ports, providing an important guarantee for improving the quality and reliability of forgings.
