Precision forged components are high-precision, high-demand parts, and their manufacturing processes, materials, mechanical properties, and other parameters require precise control and testing. In this article, we will discuss the testing methods for precision forged components from the perspectives of national policies and production practices.
I. National Policies on Precision Forged Component Testing
To ensure the quality and standards of precision forged components, the state has issued relevant regulations and standards. For example, GB/T 15051-2018 “Technical Conditions for Metal Forgings” stipulates some performance parameters and testing methods for precision forged components, and sets strict inspection standards for each inspection item.
In addition, the state has established a sound institutional system and management system in quality supervision, such as the “Regulations for the Inspection of Industrial Products” and related implementation regulations, to ensure the quality and safety of precision forged components. These regulations have clearly defined requirements for standardized and standardized testing of manufacturers and testing agencies of precision forged components.
II. Actual Production Testing Methods for Precision Forged Components
- Inspection of Appearance: This includes checking whether the surface of the component is flat, whether there are cracks, air holes, burrs and other defects, and whether the surface quality meets the standards, such as brightness.
- Dimensional Measurement: This is the most basic testing requirement. Usually, measuring tools such as three-coordinate measuring machines, height gauges, and micrometers are used for measurement, and the measured dimensions are compared and verified with the drawings.
- Inspection of Material Composition and Performance: Material quality is mainly detected by chemical composition analysis, metallographic microscopic analysis, and hardness testing methods. At the same time, the manufacturer needs to test the physical properties of the material, such as tensile strength, resistance to sudden fracture under tensile force, elongation, etc.
- Fatigue Test: The fatigue test is mainly used to test the fatigue life of the component after long-term use. Usually, rotary bending test machines and electric universal test machines are used for testing.
Overall, precision forged components are high-quality mechanical parts. In addition to the above four testing methods, other testing methods are also used, including metallographic microscopic analysis, toughness testing, various media corrosion tests, and non-contact displacement sensors. In actual production processes, manufacturers must strictly control and test the entire production process to ensure the high performance and quality stability of precision forged components.
