High-strength high-flexibility CuNiSn alloy material and preparation method thereof

An alloy material and high-elasticity technology, which is applied in the field of new high-strength and high-elasticity CuNiSn alloy material and its preparation, can solve the problems of poor stress relaxation resistance at high temperature, limitation, unsuitable for long time, etc., and achieve excellent fatigue resistance and good cold working characteristics. Effect

Inactive Publication Date: 2017-02-22
NINGBO XINGYE SHENGTAI GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, beryllium bronze also has its inherent disadvantages: beryllium oxide or dust is toxic; alloy properties are very sensitive to heat treatment; high temperature stress relaxation resistance is poor, and it is not suitable to work at higher temperatures for a long time; the production process is relatively complicated and the cost is high. , limiting its application to
Neither tin phosphor bronze nor Cu-9.5Ni-2.3Sn alloy can meet the requirements of outdoor or public sockets, so it is necessary to modify the Cu-9.5Ni-2.3Sn alloy to improve the fatigue resistance of the alloy to meet high Requirements for the use of elastic components with high frequency and high current

Method used

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  • High-strength high-flexibility CuNiSn alloy material and preparation method thereof
  • High-strength high-flexibility CuNiSn alloy material and preparation method thereof

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preparation example Construction

[0027] The preparation and processing technology of the copper alloy described in the present invention are: a. batching, feeding, smelting and casting according to the mass percentage, b. solution annealing, c. milling, d. rough rolling, e. trimming, f .Intermediate annealing, g. Pickling, h. Intermediate rolling, i. Solution annealing + surface cleaning, j. Finish rolling, k. Aging, l. Pickling, m. Stretch bending straightening, n. Split shearing, o .Packaging and storage.

[0028] The alloy of the present invention adopts the following raw materials for smelting: electrolytic copper, industrial pure nickel, pure tin, pure silicon, copper-manganese alloy, copper-niobium alloy and copper-zirconium alloy.

Embodiment 1

[0030] The composition of the alloy is shown in Example 1 of Table 1.

[0031] 1. Melting: Melting is carried out in a non-vacuum environment using a power frequency induction furnace. The order of adding the alloy is: first add copper (Cu), after melting, then add nickel (Ni), cobalt (Co), vanadium (V), copper-boron alloy (Cu-B), and then add tin (Sn ), add copper-phosphorus (Cu-P) alloy after it is completely melted, and after the composition test is qualified and the slag is cleaned, it is covered with baked charcoal; the melting temperature is 1250°C, and the casting temperature is controlled at 1180°C.

[0032] 2. Solution annealing: Place the billet in a bell-type annealing furnace for solution annealing, the annealing temperature is 800°C, and the holding time is 3h.

[0033] 3. Face milling: face milling of the alloy (0.8mm milling on the upper and lower surfaces).

[0034] 4. Rough rolling: the alloy strip after face milling is cold-rolled and billeted, and the tota...

Embodiment 2

[0042] The composition of the alloy is shown in Example 2 of Table 1.

[0043] 1. Melting: Melting is carried out in a non-vacuum environment using a power frequency induction furnace. The order of adding the alloy is: first add copper (Cu), after melting, then add nickel (Ni), cobalt (Co), vanadium (V), copper-boron alloy (Cu-B), and then add tin (Sn ), add copper-phosphorus (Cu-P) alloy after it is completely melted, after the composition test is qualified and the slag is cleaned, it is covered with baked charcoal; the melting temperature is 1230°C, and the casting temperature is controlled at 1170°C.

[0044] 2. Solution annealing: Place the billet in a bell-type annealing furnace for solution annealing, the annealing temperature is 800°C, and the holding time is 3h.

[0045] 3. Face milling: face milling of the alloy (0.8mm milling on the upper and lower surfaces).

[0046] 4. Rough rolling: the alloy strip after face milling is cold-rolled and billeted, and the total pr...

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Abstract

The invention provides a high-strength high-flexibility CuNiSn alloy material and a preparation method thereof. The high-strength high-flexibility CuNiSn alloy material comprises, by weight, 8.5-10.5% of Ni, 1.8-2.8% of Sn, 0.5-1.0% of Co, 0.005-0.01% of B, 0.01-0.05% of V, 0.1-0.5% of P, and the balance Cu. The alloy material is obtained through the processing treatment steps of smelting, casting, solution annealing, surface milling, rough rolling, intermediate annealing, acid pickling, intermediate rolling, secondary solution treatment, finish rolling, ageing heat treatment and the like. The tensile strength of the alloy material reaches up to 1230 MPa. Under the condition of the stress ratio being -1 and the number of circulation cycles being 107, the fatigue strength of the alloy is not less than 400 MPa. When the insertion and extraction force is greater than or equal to 1.5N, the number of insertion and extraction times is 41000-43000. Cracks occur after 46000 times of insertion and extraction, the use requirement for high-frequency and high-current elastic components can be met.

Description

technical field [0001] The invention relates to a novel high-strength and high-elastic CuNiSn alloy material widely used in the fields of high-end elastic components and electronic components and a preparation method thereof, belonging to the field of nonferrous metal processing. Background technique [0002] High-strength and high-elastic copper alloy is one of the key materials for elastic components and electronic components. It is widely used in the fields of electronics, communication and navigation, automobile industry and marine engineering. It is mainly used to prepare conductive elastic components, such as machine instruments and molds. , temperature controllers, relays, auto parts, etc. [0003] At present, copper-based elastic alloys in the domestic market are mainly made of beryllium bronze and tin phosphor bronze. Beryllium bronze is a high-quality elastic material with excellent properties such as high strength, hardness, wear resistance, non-magnetism, good e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C9/06C22C1/03C22F1/08
CPCC22C9/06C22C1/03C22F1/08
Inventor 汪东亚刘峰彭丽军刘龙明任利明陈战波高清陈水岳苑和锋吴小龙阮峰
Owner NINGBO XINGYE SHENGTAI GROUP
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