Low-lead extruded brass bar and production method thereof

A brass rod and brass technology, which is applied in the field of copper alloys for plumbing bathroom parts and equipment, can solve the problems of difficult polishing, difficult processing, and good movement, achieve good physical properties and surface quality, and improve cutting Processing performance, the effect of reducing the cost of raw materials

Active Publication Date: 2014-02-26
龙岩市鸿航金属科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing low-lead environment-friendly casting brass rods have poor surface quality, are not easy to polish, and are difficult to process. They are easy to crack during cutting and even easier to crack during stamping. Therefore, most manufacturers have to continue to use lead-containing brass. This kind of lead brass rod has good cutting performance and is used in various industries such as hardware products, bicycles, pens, electronics, batteries, household appliances, communications, clocks, etc.
However, lead is one of the heavy metals that are relatively harmful to the human body, and it is not easy to remove lead after it is discharged into the environment, and it accumulates in the environment, which is very easy to produce certain toxic effects on organisms and human bodies, especially on children's brain and nerves. Irreversible damage to kidney function, which can lead to blood lead poisoning, brain lead poisoning, mental retardation, dementia, restlessness and other adverse consequences

Method used

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  • Low-lead extruded brass bar and production method thereof

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Comparison scheme
Effect test

Embodiment 1

[0028] The invention discloses a low-lead extruded brass rod, which comprises the following raw materials in percentage by weight: 45% of electrolytic copper raw material, 19% of low-lead environmental protection recycled material, 0.8% of bismuth, 25% of zinc ingot, 0.01% of magnesium, tin 0.01%. Each of the above-mentioned raw materials is a dry raw material.

[0029] The production method for producing low-lead extruded brass rods with the above-mentioned ratio of raw materials: including the steps of melting, casting and extruding solid brass ingots and extruding the brass ingots into copper rods:

[0030] The step of said melting and extruding solid brass ingot comprises:

[0031] 1) Put the electrolytic copper raw material accounting for 45% of the brass raw material into the power frequency copper melting furnace, start the industrial voltage high voltage 380V, and then add 0.1% environmental protection refining slag removal agent (the environmental protection cleaning...

Embodiment 2

[0051] Embodiment 2 of the present invention discloses a low-lead extruded brass rod, comprising the following raw material composition in weight percentage: 48% of electrolytic copper raw material, 25% of low-lead environmental protection recycle material, 0.9% of bismuth, 28% of zinc ingot, and 0.02% of magnesium. %, tin 0.02%. Each of the above-mentioned raw materials is a dry raw material.

[0052] A production method for producing low-lead extruded brass rods by using the above raw material ratio, including the steps of melting, casting and extruding solid brass ingots and extruding the brass ingots into copper rods:

[0053] The step of said melting and extruding solid brass ingot comprises:

[0054] 1) Put the electrolytic copper raw material accounting for 48% of the brass raw material into the power frequency copper melting furnace, start the industrial voltage high voltage 380V, and then add 0.1% environmental protection refining slag removal agent (the environmenta...

Embodiment 3

[0067] Embodiment 2 of the present invention discloses a low-lead extruded brass rod, comprising the following raw material composition in weight percentage: 50% of electrolytic copper raw material, 29% of low-lead environmental protection recycle material, 1.0% of bismuth, 30% of zinc ingot, 0.02% of magnesium %, tin 0.02%. Each of the above-mentioned raw materials is a dry raw material.

[0068] The production method for producing low-lead extruded brass rods with the above raw material ratio includes the steps of melting, casting and extruding solid brass ingots and extruding the brass ingots into copper rods:

[0069] The step of said melting and extruding solid brass ingot comprises:

[0070] 1) Put the electrolytic copper raw material accounting for 50% of the brass raw material into the power frequency copper melting furnace, start the industrial voltage with a high voltage of 380V, and then add 0.1% environmental protection refining slag removal agent (the environment...

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Abstract

The invention provides a low-lead extruded brass bar and a production method thereof. The production method comprises the steps of carrying out fusion casting on raw materials, and then extruding to obtain a solid brass ingot, wherein the raw materials include 45-50% of electrolytic copper raw materials, 19-29% of low-lead environment-friendly foundry returns, 0.8-1.0% of bismuth, 25-30% of zinc ingots, 0.01-0.02% of magnesium and 0.01-0.02% of tin; extruding the brass ingot to form the brass bar. By using the formula and method provided by the invention, the low-lead environment-friendly extruded brass bar with excellent polishing and electroplating, machining and impact molding performances can be prepared.

Description

technical field [0001] The invention relates to a copper alloy for plumbing and sanitary parts and equipment, in particular to a low-lead extruded brass rod and a production method thereof. Background technique [0002] Lead brass has excellent cold and hot processing performance, excellent cutting performance and self-lubricating characteristics, and can meet the casting, forging, machining, polishing and other processes of parts of various shapes, so lead brass is widely used in electronic Telecommunications, home appliances, aerospace, automobiles, hardware decoration, shipbuilding and bathroom plumbing and other industries. The existing low-lead environmentally friendly casting brass rods have poor surface quality, are not easy to polish, and are difficult to process. They are easy to crack during cutting and even easier to crack during stamping. Therefore, most manufacturers have to use lead-containing brass. This kind of lead brass rod has good cutting performance an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C9/04C22F1/08
Inventor 曾华文
Owner 龙岩市鸿航金属科技有限公司
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