Refined crystalline strengthening method for silver magnesium nickel alloy

A fine-grain strengthening, silver-magnesium-nickel technology, applied in metal material coating process, electrolytic coating, surface reaction electrolytic coating, etc., can solve the increase of internal stress, brittleness and plasticity of silver-magnesium-nickel alloy problem, to achieve the effect of excellent electrical conductivity, good arc resistance and fine grain size

Active Publication Date: 2018-11-27
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing processing technology is difficult to solve the problems of high internal oxidation temperature, large oxide particles, and large grain size, resulting in increased internal stress of silver-magnesium-nickel alloys, reduced plasticity, increased brittleness, and significantly decreased electrical conductivity.
Although the addition of rare earth elements can refine the crystal grains, it increases the difficulty of the preparation process and increases the manufacturing cost of the silver-magnesium-nickel alloy material

Method used

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  • Refined crystalline strengthening method for silver magnesium nickel alloy
  • Refined crystalline strengthening method for silver magnesium nickel alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A method for fine-grained strengthening of silver-magnesium-nickel alloy specifically includes the following steps:

[0030] (1) Put the raw materials into the vacuum induction furnace according to the proportion to obtain AgMg 0.24 Ni 0.29 The alloy billet is cold rolled into a thin sheet with a thickness of 0.1mm.

[0031] (2) The AgMg obtained in step (1) 0.24 Ni 0.29 The slices were placed in an ethanol solution for ultrasonic cleaning for 1 minute, and then washed with pure water to dry, for later use.

[0032] (3) Using platinum metal sheet as anode, AgMg 0.24 Ni 0.29 The flake is used as the cathode, the hydrogenation electrolyte is an acid system, and the hydrogenation inhibitor is added to the solution to perform DC electrolytic hydrogenation; the electrolyte is 0.5mol / L HCl, and 0.01g / L hydrogenation inhibitor As is added 2 O 3 , Stirring for 10 minutes, using platinum metal sheet as anode, and AgMg 0.24 Ni 0.29 The sheet is charged into the cell as the cathode, the c...

Embodiment 2

[0036] A method for fine-grained strengthening of silver-magnesium-nickel alloy specifically includes the following steps:

[0037] (1) Put the raw materials into the vacuum induction furnace according to the proportion to obtain AgMg 0.17 Ni 0.15 The alloy billet is cold rolled into a thin sheet with a thickness of 2mm.

[0038] (2) The AgMg obtained in step (1) 0.17 Ni 0.15 The flakes are ultrasonically cleaned in pure acetone solution for 5 minutes, and then washed with pure water to dry, for later use.

[0039] (3) Metal platinum flakes are used as anodes, silver-magnesium nickel alloy flakes are used as cathodes. The hydrogenation electrolyte is an acidic system, and hydrogenation inhibitors are added to the solution for DC electrolytic hydrogenation; the electrolyte is 3mol / L HNO 3 , Add 1g / L hydrogenation inhibitor Na 2 HAsO 4 , Stirring for 10 minutes, using platinum metal sheet as anode, and AgMg 0.17 Ni 0.15 The sheet is charged into the cell as the cathode, the cell voltage...

Embodiment 3

[0043] A method for fine-grained strengthening of silver-magnesium-nickel alloy specifically includes the following steps:

[0044] (1) Put the raw materials into the vacuum induction furnace according to the proportion to obtain AgMg 0.21 Ni 0.19 The alloy billet is cold rolled into a thin sheet with a thickness of 0.5 mm.

[0045] (2) Put the slice obtained in step (1) into an ethanol solution for ultrasonic cleaning for 3 minutes, take it out and wash it with pure water and dry it for later use.

[0046] (3) Metal platinum flakes are used as anodes, silver-magnesium-nickel alloy flakes are used as cathodes, and the hydrogenation electrolyte is an acidic system. Hydrogenation inhibitors are added to the solution for direct current electrolytic hydrogenation; the electrolyte is 2mol / L CH 3 COOH, add 0.2g / L hydrogenation inhibitor Al 2 O 3 , Stirring for 10 minutes, using platinum metal sheet as anode, and AgMg 0.21 Ni 0.19 The sheet is charged into the cell as the cathode, the cell v...

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Abstract

The invention discloses a refined crystalline strengthening method for a silver magnesium nickel alloy and belongs to the technical field of an electric contact material. The method disclosed by the invention comprises the following steps: placing raw materials into a vacuum induction furnace in proportion and smelting, thereby acquiring a silver magnesium nickel alloy cast ingot, and then cold-rolling the cast ingot into a sheet; taking a silver magnesium nickel alloy sheet as a cathode, taking a platinum sheet as an anode and adding a hydrogenating inhibitor into a hydrogenated electrolyte which is an acidic system; performing direct current hydrogeneration for a period of time, and then taking out the silver magnesium nickel alloy sheet, cleaning and drying; taking out, performing finish rolling and shaping; placing into an atmosphere sintering furnace; keeping temperature for a period of time under the conditions of vacuum and low temperature; aerating and rising temperature; thermally oxidizing under high temperature and then cooling with the furnace. The material prepared according to the method disclosed by the invention has high strength, high hardness, high plasticity, high elasticity, excellent conductivity and excellent electric arc resistance.

Description

Technical field [0001] The invention relates to a method for strengthening fine crystals of a silver-magnesium-nickel alloy, and belongs to the technical field of electrical contact materials. Background technique [0002] Silver-magnesium-nickel alloy is a kind of silver as the matrix, containing a small amount of magnesium and nickel. After internal oxidation, the alloy has excellent elasticity and resistance to mechanical fatigue, as well as good electrical and thermal conductivity and constant elasticity at high temperatures. It has excellent electrical corrosion resistance and reliable electrical contact performance, and has a small creep speed, which is only one-tenth of pure silver, and the hardness is not affected by temperature. Commonly used as elastic electrical contact materials, it is widely used in aviation, aerospace, navigation and other high-tech and defense fields, as well as various AC and DC contactors, circuit breakers, relays and spring contact elements of m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22F1/14C22F1/02C23C8/12C25D11/00
CPCC22F1/02C22F1/14C23C8/12C25D11/00
Inventor 王玉天傅强陈清明胡劲王开军张维钧段云彪
Owner KUNMING UNIV OF SCI & TECH
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