Preparation method of high-strength and high-conductivity beryllium copper alloy

A beryllium-copper alloy and high-conductivity technology, which is applied in the field of preparation of high-strength and high-conductivity beryllium-copper alloys to achieve the effects of improving comprehensive performance, high wear resistance, and expanding the field of use

Active Publication Date: 2012-03-21
CNMC NINGXIA ORIENT GRP
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AI Technical Summary

Problems solved by technology

Beryllium-copper alloy materials with high strength and high conductivity at the same time, there is no related product at present

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] 1. Preparation of Cu-Nb20 alloy:

[0022] 20% pure niobium bars and 80% electrolytic copper are melted and cast into Ф400×L (㎜) ingots in a vacuum electric arc furnace, and forged into slabs with specifications of 200-210×300-320×L (㎜). Cold rolled to 5×300-320×L (㎜) thin plate with large processing rate, cut into 5×100×100㎜ and below blocks. At this time, the excess niobium exists in the copper matrix in the form of dendrites in the form of simple substances, forming a fibrous copper-niobium composite material dispersedly distributed. Add this alloy in the form of master alloy to the following beryllium copper alloy for melting and casting.

[0023] 2. Ingredients:

[0024] The CuBe alloy with 2-4% beryllium content, electrolytic copper, electrolytic nickel or electrolytic cobalt, and the Cu-Nb20 master alloy prepared above are mixed in a certain proportion to ensure that the alloy composition ranges from 0.15 to 0.5% Be and 1.5 to 2.4% Ni Or Co, 0.5-2.4% Nb, the ba...

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Abstract

The invention relates to a preparation method of a high-strength and high-conductivity beryllium copper alloy. In the method, the high-strength and high-conductivity beryllium copper alloy is obtained through hot working, high-working rate cold working, solution treatment, finish rolling or product drawing and aging treatment after smelting the low-beryllium alloy and copper-niobium composite materials together and casting into an ingot. The dispersively distributed copper-niobium composite materials are added into the high-conductivity low-beryllium alloy, the dispersively distributed niobium particles form an ordered composite structure in the low-beryllium alloy after one-time hot working and multiple high-working rate cold working, so that the strength and hardness of the low-beryllium alloy are greatly improved, the conductivity of the low-beryllium alloy is not influenced, and the beryllium copper alloy with the tensile strength sigma b equal to 1200-1400Mpa, hardness HB equal to 334-374 and conductivity g equal to 45-60% IAC is finally obtained. The beryllium niobium alloy prepared by the invention has high strength, high hardness, high elasticity and high wear resistance of the high-beryllium alloy and high conductivity and thermal conductivity of the low-beryllium alloy at the same time, and the comprehensive property of the beryllium copper alloy is greatly improved.

Description

technical field [0001] The invention belongs to the technical field of non-ferrous metals, and in particular relates to a method for preparing a high-strength and high-conductivity beryllium-copper alloy. Background technique [0002] Beryllium-copper alloys are divided into high-beryllium high-strength low-conductivity alloys (beryllium content 1.65-2.8%, tensile strength σ b =1100~1500 MPa, hardness HB326-391, conductivity g=20~30%IACS) and low beryllium low strength high conductivity alloy (beryllium content 0.15~0.8%, tensile strength σ b =700~980 MPa, hardness HRB 179~215, conductivity g=45~60%IACS). Each has its own advantages and disadvantages in terms of performance. Both high strength and high conductivity cannot be balanced in performance, and also limit their respective application fields. High-beryllium high-strength alloys can only be used in occasions that require high strength, high hardness, high elasticity, and high wear resistance, such as various spr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22F1/08C22C9/00C22C9/06C22C1/03
Inventor 马俊杰岳丽娟李永华潘建立
Owner CNMC NINGXIA ORIENT GRP
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