Method for plating nano nickel layer on metal workpiece

Abstract

The invention relates to a method for plating a nano nickel layer on a metal workpiece. The method comprises the following steps of: baking, carbonizing and cleaning the metal workpiece, thoroughly burning off capillary impurities on the surface of the metal workpiece, carbonizing and cleaning the obtained metal workpiece; then putting the metal workpiece into an electroplating bath with bath solution for electroplating; wherein the metal workpiece is used as the cathode of the electroplating bath, the pure nickel target is used as the anode of the electroplating bath, and the bath solution in the electroplating bath is nickel aminosulfonate solution and flows in the electroplating bath; in the electroplating process, the pure nickel target of the anode is electrolyzed into nanometer nickel ions which are deposited in the capillary of the surface of the metal workpiece of the cathode and are regularly arranged into layered nano nickel film in sequence; and finally the metal workpiece is taken out from the electroplating bath and cleaned; wherein the electroplating technique is adopted to fill the nanometer nickel ions in the capillaries of the surface of the metal workpiece in a drilling manner; then the nanometer nickel ions can also be arranged and laminated on the surface of the metal workpiece in sequence, thus being capable of greatly increasing the surface toughness of the metal workpiece so as to strengthening the fragility of the metal workpiece.

Description

technical field [0001] The invention relates to a method for plating a nano-nickel layer on metal workpieces, for example, the metal workpieces include metal cutting tools, metal molds and metal fittings, and the like. Background technique [0002] In the early days, metal workpieces were processed through heat treatment and vacuum titanium plating (PVD; PlasmaVapor Deposition), so that the metal workpieces have the characteristics of high hardness and high brittleness. However, in the actual processing process, metal workpieces are often not hard enough. Unusable, all because the brittleness is too high to cause cracking and fail. [0003] At present, there is also a nickel-plating process on metal workpieces to improve the above-mentioned deficiencies. The existing nickel-plating methods for metal workpieces include laser nickel plating. For example, you can refer to a tool structure disclosed in Chinese patent ZL03107823.0. The blade is clad with a coating layer of a mix...

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Problems solved by technology

[0002] In the early days, metal workpieces were processed through heat treatment and vacuum titanium plating (PVD; PlasmaVapor Deposition), so that the metal workpieces have the characteristics of high hardness and high brittleness. However, in the actual processing process, metal workpieces are often not hard enough. It is unusable, all of which fail due to cracking caused by excessive brittleness

[0003] At present, there is also a nickel-plating process on metal workpieces to improve the above-mentioned deficiencies. The existing nickel-plating methods for metal workpieces include laser nickel plating. For example, you can refer to a tool structure disclosed in Chinese patent ZL03107823.0. The blade is clad with a coating layer of a mixture of nano-carbon fiber, nano-ceramic, adhesive and micron-sized ultra-fine cemented carbide by laser cladding, so that the gradient transition of hardness, stress and material can be achieved, so as to prolong the life of the tool. service life, but this kind of coating layer is generally thicker, at least above 20μm, so if this method is applied to metal workpieces of machining tools (such as milling cutters, etc.), it will inevitably bring greater damage during the processing Machining size error obviously does not meet the finishing requirements

[0004] Nowadays, some people have proposed the method of obtaining metal nickel nanotubes by electrochemical deposition. For example, Chinese patent ZL 200510011233.2 discloses a method for electrochemical synthesis of metal nickel nanotubes with an ordered structure. It is formed by depositing on an aluminum oxide film. A method for obtaining metallic nickel nanotubes, wherein the electrolytic solution composed of nickel sulfate, nickel chloride, and boric acid aqueous solution is prepared, and one side of the porous aluminum oxide film is sprayed with gold or coated with silver paste to prepare a gold conductive film or a silver conductive film. As the cathode of the electrochemical reaction, it is connected to the negative pole of the power supply, and the other side is in contact with the electrolyte, and then one end of the metal nickel wire is inserted into the electrolyte as the anode of the electrochemical deposition reaction, and the other end of the nickel wire is connected to the positive pole of the power supply. The ordered structure of metal nickel nanotubes can be obtained by turning on the power supply, which is obtained by obtaining orderly arranged metal nickel nanotubes on the aluminum oxide film, but for metal workpieces, the electrochemical deposition effect of the above electrolyte used is not Ideal; in view of this, the applicant combines the own characteristics of the metal workpiece, proposes a method of how to plate a nano-nickel layer on the metal workpiece, to overcome the lack of nickel plating on the metal workpiece in the prior art

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