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Easily-cut tin-brass alloy and preparation method thereof

A tin brass, free-cutting technology, applied in the field of free-cut tin brass alloy and its preparation, can solve the problems of cutting performance and corrosion resistance, high burning loss rate, etc.

Active Publication Date: 2015-04-15
JIANGXI AUDY BRASSWORK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the burning loss rate of tin (Sn), magnesium (Mg) and rare earth (Re) is relatively high, and the cutting performance and corrosion resistance still need to be improved.

Method used

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  • Easily-cut tin-brass alloy and preparation method thereof
  • Easily-cut tin-brass alloy and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Embodiment 1: A kind of free-cutting tin-brass alloy, its chemical composition is: copper 62wt%, tin 0.5wt%, lead 0.17wt%, arsenic 0.05wt%, aluminum 0.03wt%, manganese 0.04wt%, nickel 0.06wt% %, iron 0.03wt%, antimony 0.02wt%, palladium 0.04wt%, gallium 0.05wt%, gadolinium 0.04wt%, indium 0.03wt%, erbium 0.06wt%, the balance is zinc and unavoidable impurities, of which unavoidable The content of impurities is not more than 0.4 wt%;

[0014] Its preparation method is as follows:

[0015] 1) Pretreatment A: Raise the temperature of the furnace to 1210°C, put in 11wt% copper, and after complete melting, add palladium, indium, erbium, and gallium in the formula in sequence, keep warm for 12 minutes, and pour to obtain alloy a;

[0016] 2) Pretreatment B: Raise the temperature of the furnace to 1405°C, put in 17wt% copper, and after complete melting, add manganese, nickel, iron and gadolinium in the formula in turn, keep the temperature for 25 minutes, and pour to obtain al...

Embodiment 2

[0019] Embodiment 2: A kind of free-cutting tin brass alloy, its chemical composition is: copper 61wt%, tin 0.2wt%, lead 0.15wt%, arsenic 0.04wt%, aluminum 0.02wt%, manganese 0.02wt%, nickel 0.04wt% %, iron 0.01 wt%, antimony 0.01 wt%, palladium 0.01 wt%, gallium 0.02 wt%, gadolinium 0.03 wt%, indium 0.01 wt%, erbium 0.01 wt%, the balance is zinc and unavoidable impurities, of which unavoidable The content of impurities is not more than 0.4 wt%;

[0020] Its preparation method is as follows:

[0021] 1) Pretreatment A: Raise the temperature of the furnace to 1180°C, put in 7wt% copper, and after complete melting, add palladium, indium, erbium and gallium in the formula in turn, keep warm for 10 minutes and pour to obtain alloy a;

[0022] 2) Pretreatment B: Raise the temperature of the furnace to 1350°C, put in 11wt% copper, and after complete melting, add manganese, nickel, iron and gadolinium in the formula in turn, keep it warm for 20 minutes and pour it to obtain alloy b;...

Embodiment 3

[0025] Embodiment 3: A kind of free-cutting tin brass alloy, its chemical composition is: copper 63wt%, tin 0.8wt%, lead 0.2wt%, arsenic 0.06wt%, aluminum 0.04wt%, manganese 0.06wt%, nickel 0.07wt% %, iron 0.05 wt%, antimony 0.03 wt%, palladium 0.08 wt%, gallium 0.07 wt%, gadolinium 0.06 wt%, indium 0.05 wt%, erbium 0.09 wt%, the balance is zinc and unavoidable impurities, of which unavoidable The content of impurities is not more than 0.4 wt%;

[0026] Its preparation method is as follows:

[0027] 1) Pretreatment A: Raise the temperature of the furnace to 1230°C, put in 16wt% copper, and after complete melting, add palladium, indium, erbium and gallium in the formula in turn, keep warm for 15 minutes and pour to obtain alloy a;

[0028] 2) Pretreatment B: Raise the temperature of the furnace to 1460°C, put in 23wt% copper, and after complete melting, add manganese, nickel, iron and gadolinium in the formula in sequence, keep the temperature for 30 minutes and then cast to o...

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Abstract

The invention provides a lead-free easily-cut tin-brass alloy. According to the easily-cut tin-brass alloy, lead is replaced with tin, and the produced easily-cut tin-brass alloy has the advantages of excellent cutting performance, corrosion resistance and good mechanical properties. By adding a proper amount of tin into brass, the mechanical properties and corrosion resistance of the alloy can be improved. According to the method, a variety of other metallic elements, such as manganese, aluminum, antimony, arsenic, lead, nickel and the like, are added while tin is added and are treated by a special process, and then, the brass alloy performance improvement effect of tin can be enhanced, so that the corrosion resistance and cutting performance of the easily-cut tin-brass alloy prepared by the method are improved greatly. The easily-cut tin-brass alloy prepared by the method has excellent cutting performance and corrosion resistance.

Description

technical field [0001] The invention relates to an alloy and a preparation method thereof, in particular to a free-cutting tin-brass alloy and a preparation method thereof. Background technique [0002] Lead brass is widely used in various fields because of its excellent corrosion resistance, easy cutting performance and formability. For example, electrical and electronic connectors, instrument parts, water pipes for drinking water systems, faucets, valves, pipe joints, and hydraulic valves used in automobiles, firefighting, and aircraft. However, lead is very easy to fall off from the base material, and in the process of processing and after the product is discarded, lead will enter the human body through various channels to cause harm: damage to the brain center and peripheral nervous system; damage the hematopoietic system, hinder the synthesis of blood red, cause Anemia; affect the function of the digestive system; suppress the function of the immune system, etc. After...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C9/04C22C1/03
Inventor 李家德
Owner JIANGXI AUDY BRASSWORK
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