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A brass alloy and production method technology, applied in the field of metal materials, can solve the problems of difficulty in the utilization of sub-brands, waste of zinc elements, and high process costs, and achieve the effects of excellent weather resistance, excellent durability and low material cost.
Active Publication Date: 2021-03-09
NINGBO CHANGZHEN COPPER CO LTD
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Recycled yellow miscellaneous copper is a product decades ago. It is mainly composed of castings, rolled parts, and copper products (including valves, plumbing and sanitary ware, joints, decorations, components, connectors, etc.) that have failed in service, and contains lead. Brass is the main alloy variety, with a zinc content of 35-40%. If copper is recovered by pyrometallurgy, it will cause a great waste of zinc and environmental pressure. The refining method is used to remove lead in the alloy, and the process cost is high. , and lead-containing solid waste is produced at the same time, there are many difficulties and almost impossible to directly use by grade
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[0048] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.
[0049] Choose 4 embodiment brass alloys, take recycled raw material as raw material, adopt the inventive method to produce artwork, specifically comprise the following steps:
[0050] (1) Raw material pretreatment
[0051] a) Magnetic separation and elutriation of yellow miscellaneous copper after crushing to remove free iron, non-metallic inclusions, ash, etc., fully mix, take a representative sample of 10-20 kg and add it to a crucible, induction heating and melting, heat preservation, slag removal, and chemical Ingredient sample, analyze the composition, ready for use;
[0052] b) Recycled copper raw materials, brass processing scraps, aluminum-containing copper alloy scrap, recycled aluminum scrap, zinc-nickel-nickel scrap, nickel-plated copper scrap, nickel-plated brass scrap, tin bronze scrap, tin-plated copper scrap, plating Tin waste...
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Abstract
The invention discloses a brass alloy and a production method thereof. The weight percent composition of the alloy includes: Cu 51.1-55.9wt%, Pb 1.0-4.5wt%, Ni 0.35-2.5wt%, Sn 0.51-1.5wt%, Zr 0.001‑0.1wt%, Cr≤0.1wt%, Al≤0.2wt%, the balance is Zn and unavoidable impurity elements, among them, unavoidable impurity elements Fe, Sb, P, As, Si, S, Mg , the total content of Te does not exceed 1 wt% of the alloy weight percentage composition; the alloy has a microstructure in which the β-phase matrix, the α-phase and the lead-rich phase coexist, and part of the α-phase precipitates along the periphery of the lead-rich phase. Under the condition that the copper content decreases, the α phase content in the microstructure of the alloy of the present invention increases significantly compared with the theoretical value, ensuring that the alloy has an ideal α+β+lead-rich phase structure and ensuring good performance of the alloy; the alloy of the present invention The production cost is low, and its production uses copper alloy waste as the main raw material, turning waste into treasure, so that the alloy elements in the waste can be used with high value.
Description
technical field [0001] The invention relates to a copper alloy, which belongs to the field of metal materials, in particular to a brass alloy with decorative functions and a production method thereof. Background technique [0002] Due to the stability and corrosion resistance of copper and copper alloys, the losses caused by oxidation and corrosion are very small. After decades of service failure, they become renewable resources. The exploitation of resources saves a lot of energy and promotes the development of ecological civilization. [0003] Human beings have used copper metal for thousands of years. The production and consumption of copper continue to grow rapidly. With the increase in application, the invention and application of new alloys are also constantly refreshed. The amount of recycled copper after failure will increase. It will also become more and more complicated. The survey results of the status quo of recycled brass show that brass miscellaneous copper a...
Claims
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