Metal surface nanometer powder permeating method based on laser induction shock waves
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A technology of metal surface and nano-powder, which is applied in the field of metal surface modification to achieve the effect of improving surface hardness, simple operation and low cost
Inactive Publication Date: 2016-04-06
SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
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[0004] Aiming at the inadequacy of local accurate surface modification of curved surface parts in the prior art, which cannot be realized by using traditional methods, the technical problem to be solved by the present invention is to provide a method that can effectively improve the metal surface hardness, fatigue life, and wear resistance. Performance and corrosion resistance of nanopowder infiltration method based on laser-induced shock wave metal surface
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Embodiment 1
[0047] Specimen material: 6082 aluminum alloy (200mm×100mm×3mm), the nano metal particles are nickel alloy;
[0048] Mechanically polish the base metal, then clean the surface with 75% alcohol and dry;
[0049] In the clean room, prepare a 0.1mm thick plastic sheet and cut out 10mm×50mm in the middle (it can be adjusted according to actual needs). particles, and then clean up the excess part to form a particle coating layer after 0.1mm on the surface of the absorbing layer;
[0050] Then the polished surface of the base metal is covered with a nanoparticle-coated absorber layer;
[0051] Apply a constraining layer on the surface of the base metal: install the working end face of the target covered with the absorption layer on the workbench, apply a constraining layer with a thickness of 2mm on the absorption layer, and the constraining layer is 2mm deionized water;
[0052] Infiltration pre-impact treatment of the base metal: pre-impact treatment with a laser beam with a las...
Embodiment 2
[0057] Mechanical polishing of TC4 titanium alloy, then cleaning the surface with 75% alcohol and drying;
[0058] Specimen material: TC4 titanium alloy (100mm×100mm×2mm), the nano metal particles are tungsten carbide (WC);
[0059] In the clean room, prepare a 0.1mm thick plastic sheet and cut out 10mm×50mm in the middle (it can be adjusted according to actual needs). particles, and then clean up the excess part to form a particle coating layer after 0.1mm on the surface of the absorbing layer;
[0060]Then the absorbing layer coated with nanoparticles is covered on the polished surface of TC4 titanium alloy;
[0061] Apply a constraining layer on the surface of TC4 titanium alloy, install the working end face of the target covered with the absorption layer on the workbench, and apply a constraining layer with a thickness of 1.5mm on the absorption layer, and the constraining layer is 1.5mm deionized water;
[0062] The substrate metal is subjected to infiltration pre-impac...
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Abstract
The invention relates to a metal surface nanometer powder permeating method based on laser induction shock waves. The method comprises the following steps that base materials are pretreated; a machining surface is covered with an absorbing layer; a base metal surface is covered with the absorbing layer; a restraining layer is exerted on the base metal surface; pre-impact life-extension treatment is carried out on the base metal surface on which the restraining layer is exerted; impact life extension is carried out on the base metal surface subjected to the impact life extension treatment; and base metal materials are subjected to aftertreatment. In the process of covering the machining surface with the absorbing layer, in a clean room, a thin plate is taken, and an opening with the needed size and shape is shorn out in the middle; the thin plate is attached to the surface of the absorbing layer, and the middle of the thin plate is evenly coated with nanometer particles; and the rest is removed thoroughly, and a particle coating layer with the thickness equal to that of the thin plate is formed on the surface of the absorbing layer. According to the metal surface nanometer powder permeating method, a crystal structure, orientation distribution and metal surface elementary components on the base metal surface are obviously changed, the hardness, the fatigue life, the abrasion resistance and the corrosion resistance of the metal surface are effectively improved, operation is simple, and cost is low.
Description
technical field [0001] The invention relates to a metal surface modification technology, in particular to a nano-powder infiltration method on a metal surface based on a laser-induced shock wave. Background technique [0002] Surface integrity control technology is usually the last and most critical process in the manufacture of high-performance parts. Its purpose is to improve the surface quality and mechanical properties of large precision parts, so that the parts can achieve the expected performance. Large precision parts not only require dimensional accuracy, shape accuracy, surface roughness, etc., but also require the final mechanical properties and chemical properties of precision parts, including fatigue strength, hardness, wear resistance, corrosion resistance, etc., and ultimately affect the assembly of the parts. and performance. In order to improve the mechanical / chemical properties of parts, surface strengthening methods such as mechanical shot peening, ultras...
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Application Information
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Patent Type & Authority Applications(China)
IPC IPC(8): C21D10/00
CPCC21D10/005
Inventor 高宇乔红超杨涧石李伟剑张恭轩
Owner SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
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