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Brass alloy material and preparation thereof

A brass alloy and alloy technology, applied in the field of brass alloy materials and their preparation, can solve the problems of low tensile strength and complex composition, and achieve the effects of high tensile strength, simple composition and improved toughness

Active Publication Date: 2011-11-16
兴化市鸿兴新型建材有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a brass alloy material with simple composition and stronger mechanical properties in order to overcome the shortcomings of existing brass alloy materials with complex composition or low tensile strength

Method used

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  • Brass alloy material and preparation thereof
  • Brass alloy material and preparation thereof
  • Brass alloy material and preparation thereof

Examples

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preparation example Construction

[0027] According to the preparation method of the brass alloy material provided by the present invention, the copper, zinc, aluminum and bismuth can be various raw materials conventionally used in this field, for example, the copper can be various electrolytic copper. The order of adding copper, zinc, aluminum and bismuth can be determined according to the melting point of the added elements and the order and amount of volatile and easy oxidation. In the present invention, the order of adding copper, zinc, aluminum and bismuth is as follows: Electrolytic copper is added first, then zinc is added, and bismuth and aluminum are added last, and casting is performed within 2 minutes after the copper, zinc, aluminum and bismuth are smelted evenly.

[0028] The smelting method preferably includes smelting the alloy raw material into a uniform liquid mixture, and then casting the liquid mixture into shape, wherein the smelting equipment can be a vacuum arc melting furnace, a vacuum ind...

Embodiment 1

[0036] This embodiment is used to illustrate the brass alloy material provided by the present invention and its preparation method.

[0037] (1) Smelting and casting molding: 885 grams of No. 2 electrolytic copper, 592.5 grams of zinc, 15 grams of bismuth, 7.5 grams of aluminum and charcoal with a purity of 99.99% by weight are first No. 2 electrolytic copper and charcoal, then zinc, and then bismuth Put them into the vacuum arc melting furnace in the order of aluminum and smelting at 1700 ° C. After the alloy is fully melted and stirred evenly, quickly add it to the casting mold preheated to 300 ° C in advance. The melting time is 3 minutes and the pouring time is 3 minutes. Minutes, the furnace temperature is 1100 ° C, air-cooled demoulding, to obtain a Φ50 mm ingot. The composition of the ingot was 59% by weight of copper, 39.5% by weight of zinc, 1% by weight of bismuth and 0.5% by weight of aluminum.

[0038] (2) Hot extrusion: Preheat the Φ50mm ingot obtained in (1) abo...

Embodiment 2

[0048] This embodiment is used to illustrate the brass alloy material provided by the present invention and its preparation method.

[0049] The brass alloy material was prepared according to the method described in Example 1, except that the obtained extruded rod was not subjected to the recrystallization annealing step to obtain the brass alloy material sample S2 provided by the present invention.

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Abstract

The invention discloses a brass alloy material, which consists of copper, bismuth, aluminum and zinc, wherein the total amount of the material is taken as the reference, the content of the copper is between 55 and 59.9 weight percent, the content of the bismuth is between 0.7 and 1.2 weight percent, the content of the aluminum is between 0.2 and 0.8 weight percent, and the content of the zinc is between 35 and 45 weight percent. The invention provides a method for preparing the brass alloy material. The brass alloy material has simple composition and high tensile strength, and other performances such as hardness, dezincification thickness and toughness are also satisfactory. For example, the tensile strength of the brass alloy material which is prepared by the embodiment 1 and consists of59 weight percent of the copper, 39.5 weight percent of the zinc, 1 weight percent of the bismuth, and 0.5 weight percent of the aluminum is high up to 507MPa, the hardness is high up to 108HBS, the dezincification thickness is low to 238.97 microns, the elongation rate is high up to 40.5 percent, and the relative machinability is 100 percent.

Description

technical field [0001] The invention relates to an alloy material, especially a brass alloy material and a preparation method thereof. Background technique [0002] Leaded brass alloy material is recognized as an important basic material due to its excellent machinability. However, lead, as a harmful element, not only causes great pollution to the environment, but also causes various harms to the human body. Therefore, it is of great significance to develop new brass alloy materials to replace lead-containing brass alloy materials. [0003] CN 101003871A discloses a lead-free free-cutting brass alloy material: copper: 55.0-70.0%, zinc: 30.0-45.0%, tin: 0.1-10%, nickel: 0.1-2.0%, silicon: 0-5.0% , bismuth: 0.1-5.0%, selenium: 0-3.0%, aluminum: 0.01-1.0%, phosphorus: 0.05-0.15%, rhenium: 0.01-0.5%, etc. This brass alloy material contains too many types of metals, so the production process is complicated; and the above-mentioned metal elements are easily oxidized and burned ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C9/04C22C1/02B21C23/02
Inventor 刘一峰向其军马国超郭忠臣
Owner 兴化市鸿兴新型建材有限公司
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