Method and equipment for plasticity heat treatment to recover composite boards of explosive welding
A heat treatment method and technology of heat treatment equipment, applied in the direction of heat treatment equipment, heat treatment furnace, heat treatment process control, etc., can solve the problems of non-deterioration of other properties of composite panels, decrease in mechanical properties, and long heat preservation time, so as to prolong the solution treatment time, The effect of not reducing mechanical properties and preventing excessive temperature rise
Inactive Publication Date: 2009-08-12
HEBEI UNIVERSITY OF SCIENCE AND TECHNOLOGY
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Problems solved by technology
The conventional solution treatment temperature of A stainless steel is generally about 1150°C, and it needs to be kept for a long time.
However, if such a heat treatment method is applied to the composite plate, it will inevitably overheat the structure of the low-carbon steel substrate on the other side and greatly reduce the mechanical properties.
Therefore, there is currently no suitable heat treatment method that can restore the plasticity of the A stainless steel cladding without reducing other properties of the composite plate.
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[0026] Below in conjunction with accompanying drawing, the present invention is described in further detail:
[0027] figure 1 As shown, it is the process curve of a point near the surface on the outside of the A stainless steel cladding. Because the heating method of the present invention is rapid heating under the non-equilibrium state, so the heat treatment process curves of each point of different depths below the steel surface are different, but their shapes are all the same as figure 1 resemblance. This process curve shows that the A stainless steel cladding material of the composite plate is heated extremely quickly below 1000 ° C, and the temperature rises slightly slowly when it reaches 1000 ~ 1250 ° C. When it reaches the highest temperature, it begins to maintain or slowly decline until it enters the cooler , the temperature drops sharply. Although this high-temperature process takes a short time, it can also play the role of partial solution treatment because it...
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This invention discloses method and apparatus for recovering the plasticity of explosion-welded composite plate by thermal treatment. The method comprises: rapidly heating the outer side of A stainless steel coating material, removing the composite plate from the heating zone when the combination surface is 600-730 deg.C, rapidly cooling to 400 deg.C, and air-cooling to room temperature. The apparatus comprises a heater, a cooler, and a supporting roller. The supporting roller is driven by a stepless speed regulation motor. The heater and the cooler are sequentially mounted on the supporting roller. The method and apparatus can recover the plasticity of A stainless steel coating material to the level before explosion welding without the sacrifice of its corrosion resistance. Besides, the method and apparatus can ensure no obvious change of structural or mechanical properties of low-carbon steel matrix. The method and apparatus can also be used for thermal treatment of A-F double-phase stainless steel and low-carbon steel explosion-welded composite plate.
Description
technical field [0001] The invention relates to a heat treatment method and equipment thereof, in particular to a heat treatment method and equipment for recovering plasticity after explosive welding of an austenitic stainless steel plate and a low carbon steel plate. Background technique [0002] Austenitic stainless steel (replaced by "A stainless steel" in the future)-mild steel clad plate is made by welding the mild steel substrate and A stainless steel cladding together by explosive welding. In the process of explosive welding, the A stainless steel as the cladding material will undergo severe plastic flow, so that a large internal stress will appear inside the cladding metal, causing strong work hardening, and greatly reducing its plasticity. Therefore, when using such composite panel manufacturing equipment and large plastic deformation is required, cracks will appear on the outer side of the cladding material of the composite panel, that is, the A stainless steel und...
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IPC IPC(8): C21D9/46C21D11/00C21D1/34
Inventor 刘群山
Owner HEBEI UNIVERSITY OF SCIENCE AND TECHNOLOGY