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Elastic brass alloy and preparation method thereof

A brass alloy and elasticity technology, applied in the field of elastic brass alloy and its preparation, can solve the problem of not developing a preparation process, and achieve the effect of improving strength and elasticity

Active Publication Date: 2012-10-10
JINTIAN COPPER GROUP CORP NINGBO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Although relevant literature has reported on the composition of alternative materials, mainly Cu-Zn-Al series, and on this basis, other elements such as Ni, Co, Si, Zr are added, and the production process mainly adopts hot rolling (extrusion Pressing) - cold rolling (stretching) - annealing process, but has not yet developed a suitable replacement tin phosphor bronze alloy material and its preparation process

Method used

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  • Elastic brass alloy and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Use a 50Kg intermediate frequency induction furnace for melting, first add Cu-Ni master alloy and electrolytic copper, the melting temperature is 1100-1150°C, after melting, add zinc ingots, Al wire, and finally add Cu-Cr master alloy, then pour, the temperature is 1080 ~1130°C. Iron mold casting is used, the size of the ingot is 60mm×120mm×450mm, and the size after milling is 48mm×120mm×450mm. The alloy composition is as follows:

[0022] Copper is 70% by weight, zinc is 24% by weight, aluminum is 3% by weight, nickel is 2.5% by weight, and chromium is 0.5% by weight, wherein the impurities in copper and zinc are each less than 0.1% by weight.

[0023] Elastic brass alloy according to hot rolling - solution treatment - pickling - rough rolling - annealing - pickling - middle rolling - annealing - pickling - pre-finishing - annealing - pickling - finishing rolling - aging treatment - pickling - classification Bar-pack process preparation. The elastic brass alloy fini...

Embodiment 2

[0036] The composition of the alloy is: 71% by weight of copper, 25% by weight of zinc, 2% by weight of aluminum, 1% by weight of nickel, and 1% by weight of chromium, wherein the impurities in copper and zinc are each less than 0.1% by weight.

[0037] Preparation method is basically the same as Example 1, the difference is:

[0038] Solution treatment, heat in a box-type annealing furnace at 800°C for 90 minutes, then raise the temperature to 910°C for 1-3 minutes, then quickly put the sample into a water pool for quenching until the sample is cooled below 50°C, and remove the sample from Remove from the pool.

[0039] For aging treatment, heat in a box-type annealing furnace at a temperature of 200-300°C and a holding time of 1.5-2 hours.

[0040] Alloy strength and elasticity are shown in Table 3

[0041] Table 3 Alloy properties

[0042] Sample category Tensile strength (Mpa) Elongation (%) Elastic modulus (Gpa) Conductivity (%IACS) Hardness (HV) ...

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Abstract

The invention relates to an elastic brass alloy material. The material comprises the following components in percentage by weight: 70 to 71 percent of copper, 24 to 25 percent of zinc, 2 to 3 percent of aluminum, 1 to 3 percent of nickel and 0.5 to 1 percent of chromium. A preparation method comprises the following steps of: smelting; performing hot rolling; performing solid solution treatment; annealing, and performing cold rolling; and performing ageing treatment. The chromium element of which the solid solubility is reduced with the reduction of temperature is added into a metal matrix, a supersaturated solid solution is formed through high temperature sold solution quenching treatment, and is decomposed through ageing treatment to form a large number of fine dispersed Cr particles, and the particles are dispersedly distributed in the matrix to form a precipitated phase, so that the strength, electrical conductivity and elasticity of an alloy are improved. An elastic brass alloy strip prepared by the method meets the technical requirements on temperature rise, electrical performance and the like after being made into a fuse clip, can replace scarce tin phosphorus bronze and is applied to related fields.

Description

technical field [0001] The invention relates to an elastic brass alloy and a preparation method thereof. Background technique [0002] At present, tin phosphor bronze strip is one of the most widely used copper alloy elastic materials, and is used in the production of various elastic components such as electrical connectors, switches, and connectors. With the rapid development of the electronics, communications and automotive industries, the demand for tin phosphor bronze strips is increasing day by day, so it is urgent to develop alternative materials and production methods for tin phosphor bronze. [0003] British high-end plugs are often equipped with a fuse, which makes it easier to ensure the safety of users. The fuse clip for installing the fuse should be made of tin phosphor bronze. The price of tin phosphor bronze is relatively expensive, especially the shortage of tin resources, and it is urgent to develop a product with a lower price. At the same time, it is par...

Claims

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Application Information

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IPC IPC(8): C22C9/04C22C1/03C22F1/08
Inventor 李杰王永如张恒戴姣燕武跃维巢国辉洪燮平
Owner JINTIAN COPPER GROUP CORP NINGBO
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