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How to choose hardware tools for heat treatment equipment

First, the shape and size of the heated workpiece
For large workpieces, bar stocks and solid materials, heat treatment equipment with relatively high power and low frequency should be used. For small workpieces, pipes, plates, gears, etc., heat treatment equipment with low relative power and high frequency should be used.
 
Second, the depth and area of ​​heating required
Deep heating depth, large area, overall heating, heat treatment equipment with high power and low frequency should be selected; shallow heating depth, small area, local heating, heat treatment equipment with low relative power and high frequency.
 
Third, the required heating rate
The required heating speed is fast, and heat treatment equipment with relatively large power and relatively low frequency should be selected.
 
Fourth, the continuous working time of the equipment
The continuous working time is long, and the heat treatment equipment with slightly higher power is used. On the contrary, the equipment with relatively small power is selected.
 
Fifth, the connection distance between the sensing component and the device
The connection is long and even requires the use of water-cooled cable connections. Heat treatment equipment with relatively high power should be used.
 
Sixth, process requirements
In general, quenching, welding and other processes, the relative power can be selected smaller, the frequency is selected higher; tempering, annealing and other processes, the relative power is selected to be larger, the frequency is selected lower; red punch, hot forging, smelting, etc., need For a process with good diathermy effect, the power is selected more and the frequency is selected lower. Hardware tools 7. Material of the workpiece The relative power of the high melting point of the metal material is larger, the relative power of the lower melting point is smaller, the power of the smaller resistivity is larger, and the power of the resistivity is smaller.
 
Surface hardening is a heat treatment method in which a workpiece is rapidly heated to a quenching temperature and then rapidly cooled to obtain only a quenched structure on the surface. That is, by rapid heating, the surface of the workpiece quickly reaches the quenching temperature, and when the heat is not transmitted to the core, it is rapidly cooled, so that the surface obtains a high-hardness martensite structure, and the core still retains toughness and plasticity. Good original organization. The surface quenching process can make the surface of the part have high strength, hardness and wear resistance, while the core has a certain strength, sufficient plasticity and toughness.
 
In order to reach the temperature above the phase transition point within the finite depth of the surface of the workpiece, it is necessary to heat the surface of the workpiece at a very high energy density, so that the heat on the surface of the workpiece is not as good as that to the core, and the surface and the core are extremely Large temperature difference.
   
Therefore, surface quenching is often named and classified in the form of energy supplied to the surface.
 
Surface quenching is divided into induction heating surface quenching, flame heating surface quenching, contact resistance heating surface quenching, electrolyte heating surface quenching, laser and electron beam heating surface quenching. At present, the most widely used heat treatment production is induction heating surface quenching, followed by flame heating surface quenching.
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