Copper-chromium-molybdenum ternary alloy coating and preparation method thereof

A ternary alloy and coating technology, applied in the field of copper-chromium-molybdenum ternary alloy coating and its preparation, can solve the problems of increased smelting segregation, increased crack notch sensitivity, unrealistic hardness and strength, and improved surface hardness. , the preparation method is simple, the effect of uniform dispersion
CN101892502AInactive Publication Date: 2010-11-24SOUTH CHINA UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
SOUTH CHINA UNIV OF TECH
Publication Date
2010-11-24
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a copper-chromium-molybdenum ternary alloy coating and a preparation method thereof. The preparation method comprises the following steps of: dissolving a nitric acid with distilled water, adding sodium molebdate hexahydrate for stirring and dissolving, adjusting a pH value to be 1.5 to 3.3, sequentially adding lanthanum chloride, ammonium sulfate and ammonium formate, adjusting the pH value to be 2.1 to 4.0, sequentially adding blue copperas, chromium sulfate hexahydrate and a boric acid, adding the remaining distilled water, and adjusting the pH value to be 2.0 to 3.8 to obtain electroplating solution; performing polishing and chemical washing on the surface of a substrate, placing the treated substrate into an electroplating bath, dipping the substrate into the electroplating solution, electroplating and depositing the substrate for 30 to 60 minutes at 40 to 55 DEG C, taking the substrate out after the electroplating is finished, and washing and drying the substrate to obtain the copper-chromium-molybdenum ternary alloy coating. In the copper-chromium-molybdenum ternary alloy coating and the preparation method thereof, the alloy components of the surface can be changed according to specific requirements so as to improve the hardness, strength and wear-resisting property of the surface, while the component of a core part is also Cu with high electrical conductivity and thermal conductivity.
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Description

technical field

[0001] The invention belongs to the technical field of electroplating thin films, in particular to a copper-chromium-molybdenum (Cu-Cr-Mo) ternary alloy coating and a preparation method thereof. Background technique

[0002] Nowadays, with the rapid development of mechanical and electronic technology, many mechanical and electrical materials need to operate under high electrical conductivity, high thermal conductivity and high strength conditions. Such as commutators of DC generators, overhead wires of trams and electric trains, electrical plugs, switches, motor collector rings, etc. At present, such materials usually use smelting QCr0.5 or add a small amount of Zr and Mg on this basis, and improve the wear resistance by increasing the hardness and strength of Cu without reducing the electrical conductivity and thermal conductivity of Cu. . Pure copper has the best electrical and thermal conductivity, but has low strength and hardness and is easy to wear an...

Claims

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