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

Inactive Publication Date: 2010-11-24
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Increasing the content of Cr, Mo, and W in the Cu matrix will also cause increased segregation in smelting, increased sensitivity to crack gaps, and diffi

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] (1) Take a beaker washed with distilled water, add 60ml of distilled water to it, weigh and add 1.5g of C 6 h 8 o 7 (citric acid), to be C 6 h 8 o 7 Add 2.5g of Na after complete dissolution 2 MoO 4 ·6H 2 O, stir well to make Na 2 MoO 4 ·6H 2 O is completely dissolved, then add sulfuric acid to adjust the pH value of the solution to 2.6, after the adjustment is completed, add 0.4g of LaCl 3 ·nH 2 O and 2g of (NH 4 ) 2 SO 4 , adjust the pH value of the solution to 3.0 with sulfuric acid, and then add 7.5g of CuSO 4 ·5H 2 O, 7.5g of Cr 2 (SO 4 )3 ·6H 2 O and 3g of H 3 BO 3 , it is required that the previous drug is completely dissolved before adding the next drug, and adding distilled water to 100ml, and finally adjusting the pH value to 2.5 with sulfuric acid to obtain the electroplating solution, which is placed in the plating tank;

[0035] (2) Use a 20×10mm pure copper sheet as a plated piece, protect the non-plating surface (back) with insulating...

Embodiment 2

[0037] (1) Take a beaker washed with distilled water, add 60ml of distilled water to it, weigh and add 1.5g of C 6 h 8 o 7 (citric acid), to be C 6 h 8 o 7 Add 2.5g of Na after complete dissolution 2 MoO 4 ·6H 2 O, stir well to make Na 2 MoO 4 ·6H 2 O is completely dissolved, then add sulfuric acid to adjust the pH value of the solution to 2.7 lower than required, after the adjustment is completed, add 0.4g of LaCl in turn 3 ·nH 2 O, 3g of NH 4 COOH and 5g of (NH 4 ) 2 SO 4 ,, adjust the pH value of the solution to 2.8 with sulfuric acid, and then add 7.5g of CuSO 4 ·5H 2 O, 7.5g of Cr 2 (SO 4 ) 3 ·6H 2 O and 4g of H 3 BO 3 . It is required that the last drug is completely dissolved before adding the next drug, and add distilled water to 100ml, and finally adjust the pH value to 3.2 with sulfuric acid again to obtain the electroplating solution, and place the electroplating solution in the plating tank;

[0038] (2) Use a 20×10mm pure copper sheet as a ...

Embodiment 3

[0040] (1) Take a beaker washed with distilled water, add 60ml of distilled water to it, weigh and add 1.5g of C 6 h 8 o 7 (citric acid), to be C 6 h 8 o 7 After complete dissolution, add 1.5g of Na 2 MoO 4 ·6H 2 O, stir well to make Na 2 MoO 4 ·6H 2 O is completely dissolved, then add sulfuric acid to adjust the pH value of the solution to 2.7 lower than required, after the adjustment is completed, add 0.4g of LaCl in turn 3 ·nH 2 O, 5g of NH 4 COOH and 7g of (NH 4 ) 2 SO 4 , adjust the pH value of the solution to 2.1 with sulfuric acid, and then add 7.5g of CuSO 4 ·5H 2 O, 7.5g of Cr 2 (SO 4 ) 3 ·6H 2 O and 4g of H 3 BO 3 , it is required that the previous drug is completely dissolved before adding the next drug, and adding distilled water to 100ml, and finally adjusting the pH value to 3.2 with sulfuric acid again to obtain the electroplating solution, which is placed in the plating tank;

[0041] (2) Use a 20×10mm pure copper sheet as a plated piece,...

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PUM

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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.

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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Application Information

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IPC IPC(8): C25D3/58
Inventor 邱万奇曾艳祥余红雅钟喜春刘仲武曾德长
Owner SOUTH CHINA UNIV OF TECH
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