What is the process and principle of local heat treatment
In the field of industrial manufacturing, there are many materials that need to undergo high heat treatment. The high temperature is used to deform the metal by one pound to achieve the effect of modeling. Then, what is the local heat treatment? The local heat treatment is only in the production of certain parts. If changes or modifications are required, this technique is required. Local heat treatment The process and principle of local heat treatment: The parts and materials are heated to a temperature suitable for the material and kept for a sufficient time, so that the lattice arrangement inside the treated part changes and returns to the stable state used. For example, when the part is subjected to external force, the lattice is twisted, the position is dislocated, and the balance is destroyed. These phenomena can be removed by stress relief heat treatment. Global and local stress relief heat treatment - there appears to be no such heat treatment. It should be the difference between 'global and local stress relief' effect. If so, the stress relief is insufficient and incomplete. The reason is that the heating temperature and holding time are not enough. Only the overall (complete) stress relief parts can work normally, the stress is not eliminated, residual stress is left, the service life is affected, and even safety problems occur. As for the parts, even if they are partially stressed, they are generally heat treated as a whole, so that deformation caused by local heating can be avoided. Background technology: Compared with the commonly used atmosphere heating furnace, the Kehua high-frequency heat treatment device has the advantages of clean working environment and the ability to efficiently process small batches of products in a short time. These advantages make it more and more widely used. However, the current application methods of high-frequency heat processors are heat treatment for the whole device, so the design of the process is also corresponding to the overall heating, and the control requirements for the heating temperature are not strict. For products with special applications, such as: The heat treatment method of local softening of devices of the same material cannot meet the processing conditions; for constant temperature heating, and the heat treatment with relatively high heating accuracy requirements, it is also difficult to meet the processing conditions. Implementation elements of local heat treatment technology: The main technical problem solved by the present invention is to provide a local high frequency heat treatment process. By performing local heat treatment on the device through a high frequency heat processor, Kehua can realize two different metallographic structures of one material. The heat treatment real-time feedback control system composed of infrared thermostat, high frequency heat treatment controller and cooling water circulation system can precisely locate and control the temperature of the treatment components. In order to solve the above-mentioned technical problems, a technical solution adopted in the present invention is to provide a local high-frequency heat treatment process, including: a high-frequency heat treatment controller, a high-frequency heating generator, an infrared temperature controller, an infrared probe, a cooling water circulation system, A water pipe and a cloth pad, the high-frequency heating generator is an upright magnetic induction coil, a plurality of spaced high-frequency heating generators are arranged to form a heating system, and the top of the high-frequency heating generator is connected to the water pipe, The water pipeline is controlled by the cooling water circulation system, and the water pipeline forms a storage table on the upper surface, the cloth pad is placed on the storage table, and the heat treatment part of the device is placed on the cloth pad, and the cloth pad is High temperature resistant cloth pad, the infrared probe monitors the temperature of the heat treatment area on the device, the infrared probe is controlled by the infrared thermostat, and the infrared thermostat edits the monitored temperature into a signal and feeds back to the high frequency A heat treatment controller, the high-frequency heat treatment controller automatically controls the corresponding switching states of the high-frequency heating generators according to the received signal. In a preferred embodiment of the present invention, the high-frequency heating generator is controlled one-to-one by the high-frequency heat treatment controller. In a preferred embodiment of the present invention, the accuracy of the infrared thermostat is 0.2 degrees Celsius. The beneficial effects of the present invention are: local heat treatment is performed on the device by a high-frequency heat processor, so as to realize two different metallographic structures of one material, that is, two kinds of hardness. The heat treatment real-time feedback control system composed of the combination of the water circulation system can precisely position and control the temperature of the treatment components. The beneficial effects of the local high-frequency heat treatment process of the present invention are: 1. Partial heat treatment is performed on the device through a high-frequency heat processor, so that one material can achieve two different metallographic structures, that is, two kinds of hardness; The heat treatment real-time feedback control system composed of the controller, the high-frequency heat treatment controller and the cooling water circulation system can precisely locate and control the temperature of the processing parts, so as to meet the requirements of constant temperature heat treatment for the reserved parts. The above descriptions are only the embodiments of the present invention, and are not intended to limit the scope of the patent of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the description of the present invention, or directly or indirectly applied in other related technical fields, are all applicable. Similarly, it is included in the scope of patent protection of the present invention. The use of local heat treatment in the manufacture of parts or steel can effectively save energy. In the past, some metal parts were often modified to require overall heating. With this technology, local heating treatment can be achieved.