What issues should be noted during the heat treatment process of the trolley furnace?

During the heat treatment process of the trolley furnace, attention should be paid to multiple aspects to ensure the effectiveness and safety of the process. Here are some key considerations:
1. Temperature control
Accurate temperature control: The trolley furnace needs to be equipped with a high-precision temperature control system to ensure that the temperature inside the furnace can be accurately controlled within the range required by the process. This helps to improve the consistency and stability of the heat treatment effect.
Uniformity: The furnace design of the trolley furnace should ensure the uniformity of temperature distribution and avoid the occurrence of local overheating or undercooling. Temperature uniformity can be improved by optimizing the furnace structure and adopting measures such as a hot air circulation system.
2. Heating and cooling
Heating rate: Control the heating rate reasonably according to the characteristics of the metal material and the requirements of the heat treatment process. Excessive heating rate may lead to increased internal stress in the material, affecting the heat treatment effect; A slow heating rate may increase energy consumption and production costs.
Cooling method: Choose the appropriate cooling method according to the process requirements, such as air cooling, oil cooling, water cooling, etc. The cooling rate and temperature of the cooling medium also need to be strictly controlled to avoid defects such as cracks and deformation in the material.
3. Furnace loading and unloading
Preparation before furnace installation: Ensure that the surface of the workpiece is clean and free of oil stains, rust, and other impurities to avoid affecting the heat treatment effect. At the same time, the workpieces should be placed reasonably, avoiding mutual contact and stacking, to ensure uniform heating.
Discharge operation: During discharge, direct contact between the workpiece and the furnace should be avoided to prevent burns and damage to the surface of the workpiece. At the same time, attention should be paid to the cooling operation after leaving the furnace to avoid defects such as cracks in the workpiece caused by rapid cooling.
4. Safe operation
Personnel training: Heat treatment operators must undergo professional training and pass the assessment before they can start working. Be familiar with the structure, performance, and safety operating procedures of the trolley furnace, and master the correct operating methods and emergency response measures.
Equipment maintenance: Regularly maintain and upkeep the trolley furnace, check whether the electrical components, heating elements, temperature control system, etc. are working properly. Identify problems and handle them promptly to ensure that the equipment is in good condition.
Safety protection: Safety protection facilities should be set up around the trolley furnace, such as warning signs, protective railings, etc. Operators should wear protective equipment such as high-temperature gloves and goggles to prevent burns and other injuries.
5. Environmental control
Ventilation and air exchange: The trolley furnace will produce certain smoke and harmful gases during operation, and it is necessary to maintain good ventilation and air exchange in the furnace and surrounding environment to reduce the health hazards to operators and corrosion to equipment.
Fire and explosion prevention: When using gas or fuel as the heating medium for the trolley furnace, attention should be paid to fire and explosion prevention work. Ensure that there are no leaks in the gas or fuel pipelines, and equip them with corresponding firefighting equipment and emergency response measures.
In summary, the trolley furnace needs to pay attention to temperature control, heating and cooling, loading and unloading, safe operation, and environmental control during the heat treatment process. Only by comprehensively considering and strictly implementing these precautions can the effectiveness and safety of the trolley furnace heat treatment process be ensured.