As an important mechanical component, metal forgings are widely used in industrial production, such as automobiles, aerospace, energy and other fields. Its quality directly affects the performance and service life of the equipment, so it is very important to detect and control the quality of hardware forgings. This paper will introduce the quality inspection and control methods of metal forgings, aiming at improving the quality and reliability of metal forgings.
Principle of quality detection
The quality testing of metal forgings is mainly based on the physical and chemical principles, and adopts various advanced technologies and equipment to test it. Among them, the physical principles include mechanics, electromagnetism, optics, etc., and the chemical principles involve elemental analysis and metallographic analysis. Through the application of these principles, various defects and performance indicators of metal forgings can be effectively detected, such as strength, hardness, toughness, corrosion resistance and so on.
Detection method
Appearance inspection: The surface of the metal forgings is inspected visually or with a magnifying glass, including checking whether the surface has cracks, inclusions, holes and other defects.
Physical properties test: hardness test, tensile test, impact test, wear test and other methods to detect the physical properties of metal forgings.
Chemical composition detection: Through chemical analysis means, the content of each element in the metal forgings is determined to ensure that it meets the relevant standards.
Non-destructive testing: The use of ultrasonic testing, X-ray testing, magnetic powder testing and other methods to non-destructive testing of hardware forgings to find the internal defects.
Control measure
According to the test results, the following control measures are taken to improve the quality of hardware forgings:
Preliminary screening: The raw materials entering the factory are strictly checked and the defective forgings are removed.
Process control: Strengthen the quality control in the production process to ensure that each process meets the standard requirements.
End check: the quality of the finished product is tested to ensure that it meets the relevant standards. Rework or scrap unqualified forgings.
An automobile manufacturing enterprise has successfully improved the quality of brake caliper forgings by using the quality inspection and control method described in this paper. Originally, the company’s brake caliper forgings have a high rejection rate, through the introduction of advanced quality testing equipment and methods, the company has strengthened the detection and control of raw materials, production processes and finished products. Specific measures include: the use of non-destructive testing technology to detect internal defects in forgings, chemical composition analysis to ensure the quality of raw materials, and strict control of process parameters in the production process. After a year of implementation, the rejection rate of the brake caliper forgings of the enterprise has been reduced by 30%, which has saved a lot of costs for the enterprise and improved the market competitiveness. At the same time, through continuous quality improvement, the company has achieved higher production efficiency and product quality.
This paper introduces the quality inspection and control methods of metal forgings, including the principle, method and control measures of quality inspection. Through the application of these methods, the quality and reliability of metal forgings can be effectively improved. The application effect of these methods in practice is also illustrated through typical cases. In the industrial production, the quality inspection and control of metal forgings is of great significance, which helps to improve the performance and service life of the equipment, reduce the production cost and scrap rate. Therefore, the promotion and application of these methods should be strengthened to improve the overall level of the industry.
