Equipment heat treatment
Thread Content
I have a question: 1. For the heat treatment of normal equipment, should the thermocouples be placed on the outer wall or the inner wall of the equipment? 2. If it is installed outside the equipment, will the temperature difference between the inner wall and the outer wall have an impact? 3. If the wall thickness of the equipment is large, will a harmful temperature gradient be formed?
Overall in-furnace heat treatment? On-site heat treatment for large equipment? Segmented heat treatment?
Local heat treatment and overall furnace heat treatment
The entire furnace can be disregarded; for local heat treatment, the heat transfer in thick walls must be taken into account, and it is best to arrange heaters on the inner and outer sides.
But in practice, it seems that not many people care about heat transfer, and this isn’t clearly stated either in 30583
1. Question: For the heat treatment of normal equipment, should the thermocouple be placed on the outer wall or the inner wall of the equipment? Answer: Usually, thermocouples for heat treatment are installed on the outer wall of the equipment, but if the wall thickness is large, thermocouples must be installed on both the inner and outer walls. 2. Question: If it is installed outside the equipment, will the temperature difference between the inner wall and the outer wall have an impact? Answer: If the wall thickness is large, there will inevitably be a temperature difference between the inner and outer walls, and the greater the wall thickness, the larger the temperature difference. 3. If the wall thickness of the equipment is large, will a harmful temperature gradient be formed? Answer: Harmful gradients will be generated. If the wall thickness is large, medium-frequency induction heating can be used to prevent heat treatment; I have conducted experiments, and the temperature difference between the inner and outer surfaces of a 200 mm thick steel plate remains within 15°C.