Laser restoration method of tool steel
A laser repair and tool steel technology, applied in the field of laser repair, can solve the problems of small heat affected area and less heat input, and achieve the effect of small heat affected area, small heat input and easy control
Inactive Publication Date: 2014-12-31
DANYANG HONGTU LASER TECH
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Problems solved by technology
[0004] The technical problem to be solved by the present invention is to provide a laser repair method for tool steel, which has less heat input to the substrate, a small heat-affected area, and will not cause various defects such as deformation and cracks in the tool steel due to stress concentration
Method used
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Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0014] The laser repair method of the tool steel of the present embodiment, its steps are as follows:
[0015] A. Pre-treat the tool steel products that need to be repaired, and conduct metallographic inspection and failure analysis;
[0016] B. Partially preheat the part of the tool steel to be repaired at 200°C;
[0017] C. According to the failure analysis results, perform laser scanning on the parts to be repaired. The laser scanning power is 2.5KW, the spot size is 10mm×2mm, and the scanning speed is 150mm / min. Rapidly heat to the melting point of the metal, and at the same time on the surface of the molten metal Add alloy powder to metallurgically combine the alloy melt layer with the matrix;
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The invention relates to a laser restoration method of a tool steel, which comprises the following steps: A)pre-processing a tool steel product to be restored, performing metallographic detection and a failure analysis on the blade; B) preheating the local position to be restored of the tool steel at 180-220 DEG C; C)according to the result of the failure analysis, performing laser scanning on the local position to be restored, wherein the laser scanning power is 2.5-3.0KW, the spot size is 10mm*2mm, the scanning speed is 100-150 mm / min, rapidly heating to the metal fusing point, adding alloy powder on the surface of the molten metal, and performing metallurgy combining on an alloy melting layer and a matrix; and D) machining on the tool steel product and then detecting. The laser restoration method has the characteristics of good laser focusing performance and easy control, defect of the tool steel can be conveniently restored, heat input in a laser restoration technology is less, a heat-affected zone is small, during a restoration process, defects such as deformation due to stress concentration can not be generated.
Description
technical field [0001] The invention relates to laser repair technology, in particular to a laser repair method for tool steel. Background technique [0002] Tool steel is the steel used to manufacture cutting tools, measuring tools, molds and wear-resistant tools. Tool steel has high hardness and can maintain high hardness and red hardness at high temperature, as well as high wear resistance and appropriate toughness. The cutting edge of milling and cutting tools made of tool steel can withstand repeated severe impacts without cracking or curling. [0003] In the past, tool steel products were difficult to repair once they were damaged, so they had to be scrapped, and it was expensive to buy new ones for replacement, which greatly increased the process cost. The existing repair of tool steel generally adopts surfacing welding technology for repairing. The heat input of surfacing welding is high and the affected area is large. Tool steel will have defects such as deformati...
Claims
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IPC IPC(8): C23C24/10
Inventor 姚建梁邓琦林刘少彬何建方马万花
Owner DANYANG HONGTU LASER TECH