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Lead-free copper-based alloy powder material and preparation method thereof

A technology of powder material and base alloy, applied in the field of lead-free copper base alloy powder and its preparation, can solve problems such as increasing cost, and achieve the effect of saving cost, avoiding adverse consequences and improving environmental impact

Inactive Publication Date: 2010-04-21
浙江旭德新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But bismuth is a rare metal, which undoubtedly increases a lot of cost

Method used

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  • Lead-free copper-based alloy powder material and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] 1. Product formula

[0033] 1. Raw materials

[0034] Copper: copper block or copper powder with a purity of more than 99.90% (required to contain less than 0.01% lead); tin: tin ingot or tin powder with a purity of more than 99.90% (required to contain less than 0.01% lead); zinc: more than 99.95% pure Zinc ingots (impurity content is required to be less than 0.03%).

[0035] 2. Formula (calculated according to 200kg / )

[0036] Copper weight percentage: 88%, tin weight percentage: 6%, zinc weight percentage: 6%;

[0037] Copper: 200×0.88=176(kg)

[0038] Tin: 200×0.60=12(kg)

[0039] Zinc: 200×0.60=12(kg)

[0040] Phosphor bronze: 200×0.0003÷0.14=0.43(kg)

[0041] Note: In order to increase the fluidity of the copper liquid, a certain amount of phosphorus copper is added (the content is less than 0.05%, and the content of phosphorus can be ignored).

[0042] 3. Production equipment and process

[0043] Equipment: This product is smelted by intermediate frequenc...

Embodiment 2

[0073] Lead-free copper-based alloy powder material, its formula is as follows:

[0074] Cu 87.5%, Sn 6.5%, Zn 6.0%

[0075] The performance test report of the sintered bearing material of the product described in embodiment 2

[0076] Powder material properties

[0077] The preparation method of embodiment 2 is as embodiment 1.

Embodiment 3

[0079] Lead-free copper-based alloy powder material, its formula is as follows:

[0080] Cu 88.5%, Sn 6.0%, Zn 5.5%.

[0081] The performance test report of the sintered bearing material of the product described in embodiment 3

[0082] Powder material properties

[0083] The preparation method of embodiment 3 is as embodiment 1.

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Abstract

The invention relates to copper-based alloy powder, in particular to lead-free copper-based alloy powder used for manufacturing mechanical parts, automobile bearings and the like, and a preparation method thereof. A lead-free copper-based alloy powder material consists of the following components in percentage by weight: 87 to 89 percent of Cu, 5 to 7 percent of Sn, and 5 to 7 percent of Zn; and the total weight of the Cu, the Sn and the Zn is 100 percent. The preparation method realizes no lead by blending the content of copper, tin and zinc, and saves cost; and the wear resistance and bonding strength of a bearing material produced by sintering the alloy powder can be equal to or even superior to those of a sintered copper-lead bimetallic material. The lead-free copper-based alloy powder material is a novel material capable of replacing the copper-lead bimetallic material, is mainly used in aspects such as the mechanical parts, automobile bearings and the like, improves the influence of a lead-containing metal material on the environment in the sintering process, and avoids lead-containing rejected materials causing negative effect on the environment.

Description

technical field [0001] The invention relates to a copper-based alloy powder, in particular to a lead-free copper-based alloy powder for manufacturing mechanical parts, automobile bearings and the like and a preparation method thereof. Background technique [0002] The traditional copper-based alloy powder used to manufacture bearing bush materials is composed of copper, lead, tin, zinc (or phosphorus). Because it contains lead, it is poisonous to the human body and pollutes the environment. Lead and its compounds are harmful to various tissues of the human body. Toxic, the way of poisoning can be to inhale its vapor or dust through the respiratory tract, and then the phagocytes in the respiratory tract will quickly bring it to the blood; or it can be absorbed through the digestive tract and enter the blood circulation to cause poisoning. The European Union's "Restrictions on the Use of Certain Hazardous Substances in Electrical and Electronic Equipment" stipulates that start...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C9/04C22C9/02C22C1/02B22F9/08
Inventor 吴棕洋张福生刘炎平张伟民
Owner 浙江旭德新材料有限公司
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