Free-cutting brass alloy and manufacturing method therefor

A technology of brass alloys and manufacturing methods, applied in the field of brass alloys, can solve problems such as insufficient dezincification resistance, low solid solubility, composition segregation, etc., achieve excellent dezincification resistance performance, improve mechanical properties, and improve processing performance Effect

Inactive Publication Date: 2018-05-01
GUANGDONG WEIQIANG COPPER IND SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the bismuth brass materials that have been developed and used are mainly cast rods and extruded rods, mainly because the solid solubility of bismuth in copper is extremely low, and the composition segregation is easy to occur during the melting process, which affects the internal qua

Method used

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Example Embodiment

[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0021] A free-cutting brass alloy, comprising 62% to 65% copper, 0.01% to 0.15% iron, 0.2% to 0.6% tin, 0.2% to 0.6% aluminum, and 0.02% to 0.2% by weight percentage Nickel, 0.06%~0.15% arsenic, 0.3%~1.2% bismuth, 0.03%~0.15% antimony, 0.0005%~0.0025% boron, 34%~37% zinc and 0.01%~0.1% mixed rare earth Modifier.

[0022] As a specific embodiment, the free-cutting brass alloy includes 62% copper, 0.15% iron, 0.6% tin, 0.6% aluminum, 0.2% nickel, 0.15% arsenic, and 1% bismuth by weight percentage. , 0.15% antimony, 0.002% b...

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Abstract

Provided are a free-cutting brass alloy and a manufacturing method therefor. The copper alloy comprises, by weight percentage: 62% - 65% of copper, 0.01% - 0.15% of iron, 0.2% - 0.6% of tin, 0.2% - 0.6% of aluminum, 0.02% - 0.2% of nickel, 0.06% - 0.15% of arsenic, 0.3% - 1.2% of bismuth, 0.03% - 0.15% of antimony, 0.0005% - 0.0025% of boron, 34% - 37% of zinc and 0.01% - 0.1% of a mixed rare earth modificator.

Description

Technical field [0001] The invention relates to the field of brass alloys, in particular to a free-cutting brass alloy and a manufacturing method thereof. Background technique [0002] Lead-free free-cutting brass is a brass alloy based on copper and zinc with a certain amount of bismuth, tin, aluminum, antimony, and arsenic. Substituting bismuth for lead, its cutting performance is equivalent to or close to that of lead brass, and its resistance to dezincification reaches AS2345 standard, excellent forging processing performance. However, the bismuth brass materials that have been developed and used are mainly cast rods and extruded rods. The main reason is that the solid solubility of bismuth in copper is extremely low, and component segregation is easy to occur during the smelting process, which affects the internal quality of the ingot. Bismuth is often distributed as a brittle film on the grain boundaries of brass, which produces both hot brittleness and cold brittleness, w...

Claims

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Application Information

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IPC IPC(8): C22C9/04C22C1/03C22F1/08
CPCC22C1/03C22C9/04C22F1/08C22C1/02
Inventor 梁绍阮伟光李绍遴
Owner GUANGDONG WEIQIANG COPPER IND SCI & TECH CO LTD
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