Non-lead-bismuth easily-cut antimony brass alloy

A brass alloy and easy-cutting technology, which is applied in the field of lead-free bismuth free-cutting antimony brass alloy, can solve the problems of easy burning and inappropriateness, and achieve the effects of less burning loss, less evaporation and oxidation, and strong practicability

Inactive Publication Date: 2012-05-30
辛良策
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since rare earth elements are easy to burn out at the brass smelting temperature, this solution is not suitable for occasions where copper liquid needs to be kept warm for a long time, such as metal mold casting and furnace charge remelting

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] After melting copper 58%, iron 0.5%, and manganese 0.5% to form copper liquid, press 0.03% phosphorus into copper liquid with bell jar for deoxidation, add zinc, and press 0.3% antimony and 0.06% magnesium into copper liquid with bell jar , stir. Then use a bell jar to press 0.005% boron and 0.7% aluminum in the form of copper-boron master alloy into the copper liquid, stir, remove slag, and boil to degas. Pouring sand mold castings. The chips formed by processing (such as tapping, etc.) on the metal casting are in the shape of short tapered threads. After 6 hours of static heat preservation, cast metal mold castings, and the chips are in the shape of 1 to 2 turns of thread.

Embodiment 2

[0019] Melt 60% copper, 0.3% iron, and 0.3% manganese to form copper liquid, press 0.03% phosphorus into the copper liquid with a bell jar for deoxidation, add zinc, and press 0.2% antimony and 0.04% magnesium into the copper liquid with a bell jar , stir. Then use a bell jar to press 0.001% boron and 0.5% aluminum in the form of copper-boron master alloy into the copper liquid, stir, remove slag, and boil to degas. Pouring metal mold castings, the chips formed by processing the metal mold castings are in the shape of short tapered threads. After standing for 4 hours to keep warm, cast metal mold castings, and the chips are in the shape of 1 to 2 turns of thread.

Embodiment 3

[0021] Melt 62% copper, 0.1% iron, and 0.1% manganese to form copper liquid, press 0.03% phosphorus into the copper liquid with a bell jar for deoxidation, add zinc, press 0.1% antimony and 0.02% magnesium into the copper liquid with a bell jar , stir. Then use a bell jar to press 0.0005% boron and 0.2% aluminum in the form of copper-boron master alloy into the copper liquid, stir, remove slag, and boil to degas. Pouring metal mold castings. Chips are short tapered threads.

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PUM

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Abstract

The invention discloses a non-lead-bismuth easily-cut antimony brass alloy. The non-lead-bismuth easily-cut antimony brass alloy comprises the following components by weight percent: 58-62% of copper, 0.1-0.3% of antimony, 0.02-0.06% of magnesium, 0.2-0.7% of aluminum, 0.1-0.5% of manganese, 0.0005-0.005% of boron, 0.01-0.03% of phosphorus, 0.1-0.5% of iron and the balance of zinc and other inevitable impurity elements, wherein the content of lead in the inevitable impurities is not more than 0.1%. The alloy takes antimony as a main component, and magnesium, manganese and aluminum are respectively reacted with bismuth so as to form granular compounds with a particle size of 15-80mu m, and the granular compounds are distributed in a dendritic crystal and a matrix. Modification of boron leads magnesium antimony compounds to be granularly and uniformly distributed; the alloy has good cutting property due to the granular compounds; and the alloy also has good hot processing properties such as casting, forging, welding and the like, and the alloy still maintains good cutting property after remelting and long-time heat preservation.

Description

【Technical field】 [0001] The invention relates to an antimony-containing brass alloy, in particular to a lead-free bismuth free-cutting antimony brass alloy with excellent environmental protection, cutting performance and thermal processing performance. 【Background technique】 [0002] Brass has good mechanical properties, its relatively low cost and good corrosion resistance make it widely used in manufacturing. Due to the good plasticity of brass, very long chips will be produced during cutting. The long chips are easy to circle and not easy to break, which hinders the cutting process. In order to improve the cutting performance of brass, the traditional method is to add 1 to 3% lead to brass. However, lead will produce harmful vapor in the process of smelting and casting, and the lead in parts will be leached in water, seriously polluting the environment and endangering human health. Therefore countries have promulgated decrees one after another to strictly limit the con...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C9/04
Inventor 郑恩沛
Owner 辛良策
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