High-frequency quenching machine tools are widely used for surface quenching treatment of shaft-type parts.

In the manufacturing industry, high-frequency quenching machines are indeed widely used for surface quenching treatment of shaft parts such as automotive camshafts, transmission shafts, rocker arms, etc. This heat treatment process can significantly improve the surface hardness and wear resistance of these key components, thereby enhancing their overall performance and reliability. The following is a detailed explanation by Shenghao Electromechanical on the application and advantages of high-frequency quenching machine tools in surface quenching treatment of shaft parts:
Application of High Frequency Quenching Machine Tool
Automobile Camshaft:
The camshaft is a critical component in the engine, responsible for controlling the opening and closing of valves. By high-frequency quenching treatment, the hardness and wear resistance of the cam surface can be significantly improved, the service life can be extended, and the stable operation of the engine can be ensured.
transmission shaft:
Drive shafts are used to transmit power and typically withstand high torque and stress. High frequency quenching treatment can enhance the hardness and strength of the transmission shaft surface, improve its fatigue resistance and durability.
Rocker arm shaft:
The rocker arm shaft is an important component in the engine valve train, responsible for driving the opening and closing of valves. High frequency quenching treatment can improve the surface hardness of the rocker arm shaft, reduce wear, and enhance its working life and reliability.
Other shaft components:
Including crankshaft, connecting rod journal, gear shaft, etc. High frequency quenching treatment is also applicable to these parts to improve their surface hardness and wear resistance, ensuring long-term stable working performance.
The advantages of high-frequency quenching treatment
Improve surface hardness:
High frequency quenching treatment can quickly heat the surface of shaft parts to high temperatures (usually 800 ° C to 950 ° C) in a short period of time, and then rapidly cool them to form martensitic structure, thereby significantly improving surface hardness.
Improve wear resistance:
The increase in surface hardness directly enhances the wear resistance of the parts, reduces the risk of failure caused by wear, and extends the service life of the parts.
Improve fatigue resistance:
The hardened layer formed by high-frequency quenching treatment not only increases the surface hardness, but also improves the microstructure of the material, enhancing the fatigue resistance of the parts, especially under high stress and high-frequency loads.
Localized heating:
High frequency induction heating is a localized heating method that can precisely control the heating area, avoid unnecessary thermal effects on the entire part, and reduce deformation and internal stress.
Efficient and energy-saving:
High frequency quenching treatment has fast processing speed, high energy utilization efficiency, and is more energy-efficient compared to traditional heat treatment methods.
High degree of automation:
Modern high-frequency quenching machine tools are usually equipped with automated control systems, which can achieve continuous production and real-time monitoring, improve production efficiency and product quality.
environment protection
Non contact heating reduces the risk of pollution and wear, meeting environmental requirements.
technological process
preparation:
Clean the surface of shaft components to be quenched, removing oil stains, rust, and other impurities.
Select the appropriate induction coil and adjust its position to ensure even heating.
Prepare cooling medium, such as water or quenching oil.
Parameter settings:
Set appropriate heating frequency, power, and time based on the material and specifications of the shaft components.
Ensure that the heating temperature and cooling rate meet the material characteristics and final performance requirements.
Heating process:
Place the shaft components in the induction coil and start the high-frequency quenching machine.
The high-frequency current generates eddy current effect through the induction coil, causing the surface of the part to rapidly heat up to the quenching temperature.
Use temperature sensors to monitor the temperature during the heating process, ensuring that the desired quenching temperature is reached.
Quenching and cooling:
After the part reaches the quenching temperature, quickly immerse it in a cooling medium (usually water or quenching oil).
Rapid cooling forms a hardened layer, improving the hardness and wear resistance of the parts.
tempering:
After quenching, tempering treatment is required to eliminate internal stress and stabilize the microstructure.
The tempering temperature is usually low (such as 150 ° C to 250 ° C), depending on the material properties and final performance requirements.
quality testing:
Perform necessary inspections on quenched parts, such as hardness testing, metallographic analysis, etc.
Check for cracks or other defects in the parts to ensure that the product quality meets the standards.
Choose the appropriate heating frequency, power, and time based on different component materials and specifications.
Ensure that the heating temperature and cooling rate meet the material characteristics and final performance requirements.
Uniform heating:
Ensure uniform heating on the surface and inside of the parts, avoiding local overheating or insufficient heating that may affect the quenching effect.
Safety measures:
Operators must wear appropriate personal protective equipment, such as fire-resistant clothing, goggles, and gloves.
Ensure sufficient ventilation in the work area to eliminate potential harmful gases.
Prepare fire extinguishers and other emergency equipment to prevent accidental fires or other emergencies.
quality testing:
After quenching, necessary inspections such as hardness testing, metallographic analysis, etc. should be carried out to ensure that there are no cracks or other defects.
Check the hardness and wear resistance of the parts to ensure compliance with standards.