The research of welding technology and joint performance of starting rod forging is the process of researching and optimizing its welding method and joint quality. The selection of welding process and the evaluation of connection performance are crucial to ensure the reliability and service life of starter bar forgings.
- Welding process selection:
- Material matching: First of all, the material of the starter rod forging needs to be analyzed to determine the selection of welding materials. Factors such as the chemical composition proximity and compatibility between the starting rod forging and the welding material should be taken into account to ensure the structural strength and corrosion resistance of the weld.
- Welding method selection: According to the material and structural characteristics of the starting rod forging, comprehensive consideration of high-frequency welding, argon arc welding, resistance welding and other welding methods. At the same time, considering the welding efficiency, welding deformation, energy consumption and equipment requirements and other factors, choose the appropriate welding method.
- Determination of welding parameters: According to the selection of welding method, determine the best welding parameters through tests and practices, including welding current, welding speed, welding pressure, etc., to ensure the quality and connection performance of the weld.
- Connection performance evaluation:
- Strength assessment: tensile test, shear test and other methods to evaluate the strength of the weld joint. It is necessary to determine the strength index of the weld according to the design requirements and use conditions of the starting rod forging, such as tensile strength, yield strength, etc.
- Fatigue performance evaluation: Fatigue tests are carried out to evaluate the fatigue life and fatigue limits of weld joints under cyclic loads. The S-N curve (stress-life curve) and the fatigue strength index of the weld joint were derived through the tests under different load levels, and the fatigue performance was evaluated.
- Ductility evaluation: The ductility of the weld refers to the plastic deformation ability of the welded joint during the stress process. By means of compression test and impact test, the ductility and toughness of weld joints are evaluated, and the reliability and safety of weld joints under complex working conditions are judged.
- Corrosion resistance assessment: The corrosion resistance of welded joints is tested to evaluate the corrosion resistance of welded materials to environmental media. Salt spray test, corrosion potential scanning and other methods can be used to evaluate the corrosion resistance of weld joints in harsh environments.
Through the selection of welding process and the evaluation of connection performance, the welding method suitable for starting rod forging can be determined to ensure the quality and reliability of welded joints. At the same time, optimizing the welding process and improving the connection performance help to improve the durability and service life of the starter bar forging.
