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Lead-free, bismuth-free, silicon-free brass

A brass alloy, machinability technology, applied in the field of easy-cutting and dezincification-resistant brass alloy materials, can solve the problems of brass tube perforation, accelerated dezincification corrosion, and shortened service life of brass products

Active Publication Date: 2016-11-16
JIAXING IDC PLUMBING & HEATING TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In addition, when the zinc content in the brass exceeds 20wt%, the corrosion phenomenon of dezincification is prone to occur, especially when the brass is exposed to an environment with high chloride ions, such as a seawater environment, the dezincification corrosion phenomenon will be accelerated occur
Dezincification will seriously damage the structure of the brass alloy, reduce the surface strength of the brass product, or even cause the brass tube to perforate, greatly shorten the service life of the brass product, and cause problems in application

Method used

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  • Lead-free, bismuth-free, silicon-free brass
  • Lead-free, bismuth-free, silicon-free brass
  • Lead-free, bismuth-free, silicon-free brass

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0065] Invention 1 with 5 different components prepared according to the above process is shown in Table 1-1, numbered 1001-1005 respectively, and the unit of each component is weight percent (wt%).

[0066] Table 1-1

[0067] serial number

Copper (Cu)

Zinc (Zn)

Magnesium (Mg)

Antimony (Sb)

1001

62.605

36.839

0.254

0.010

[0068] 1002

64.355

34.819

0.402

0.022

1003

65.000

34.198

0.100

0.150

1004

60.000

39.373

0.122

0.103

1005

61.005

38.040

0.500

0.143

[0069] The alloys of the above components are tested in the form of casting at room temperature for cutting performance, dezincification resistance, tensile strength and elongation. The comparison sample is leaded brass with the same state and specifications, that is, C36000 alloy .

[0070] The experimental results of tensile strength, elongation, cutting performance and dezincification resistance ar...

Embodiment 2

[0073] Invention 2 with 5 different components prepared according to the above-mentioned process in Table 2-1 is numbered 2001-2005 respectively, and the unit of each component is weight percent (wt%).

[0074]table 2-1

[0075] serial number

Copper (Cu)

Zinc (Zn)

Magnesium (Mg)

Antimony (Sb)

Manganese (Mn)

Phosphorus (P)

2001

60.000

39.044

0.352

0.012

---

0.300

2002

64.501

34.340

0.403

0.010

0.302

0.152

2003

63.522

35.226

0.500

0.150

0.050

----

2004

65.000

34.144

0.220

0.132

0.252

0.050

2005

61.522

37.173

0.100

0.051

0.500

0.252

[0076] The alloys of the above components are tested in the form of casting at room temperature for cutting performance, dezincification resistance, tensile strength and elongation. The comparison sample is leaded brass with the same state and specifications, that is, C36000 alloy .

[0077] T...

Embodiment 3

[0080] Table 3-1 shows Invention 3 with 8 different components prepared according to the above process, numbered 3001-3008, and the unit of each component is weight percent (wt%).

[0081] Table 3-1

[0082] serial number

Copper (Cu)

Zinc (Zn)

Magnesium (Mg)

Antimony (Sb)

Aluminum (Al)

Tin (Sn)

Manganese (Mn)

Phosphorus (P)

Boron (P)

3001

63.502

35.309

0.103

0.018

0.500

0.052

0.050

0.173

0.001

3002

60.000

37.758

0.500

0.047

0.522

0.500

0.051

0.252

----

3003

65.221

33.233

0.487

0.010

0.622

0.050

0.032

0.050

0.010

3004

63.523

34.577

0.273

0.095

0.303

0.351

0.067

0.300

0.008

3005

63.210

34.673

0.100

0.032

0.700

----

0.500

0.178

0.004

3006

65.000

33.244

0.211

0.150

0.352

0.235

0.253

----

0.003

3007

60.351

38.339

0.195

0.111

...

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Abstract

The present invention relates to a brass alloy without lead, bismuth and silicon. The brass comprises 60-65 wt% of copper, 0.01-0.15 wt% of stibium, 0.1-0.5wt% of magnesium, at least one component selected from 0.1-0.7 wt% of aluminum, 0.05-0.5 wt% of stannum, 0.05-0.5 wt% of manganese and 0.001-0.01 wt% of boracic, and the balance zinc. The brass alloy of the present invention doesn't contain lead and can't cause lead pollution, and doesn't contain bismuth and silicon, so the machinability of the brass alloy is better.

Description

technical field [0001] The invention relates to an environment-friendly brass alloy, in particular to a brass alloy material which is easy to cut and resists dezincification. Background technique [0002] Generally used as brass for processing, the proportion of zinc metal added is 38-42%. In order to make brass work better, there is usually 2-3% lead in brass to increase strength and workability. Leaded brass has excellent formability (easy to make products of various shapes), machinability and wear resistance, and is widely used in various shapes of machined parts. It occupies a large proportion in the copper industry and is recognized in the world. important basic material. However, during the production or use of leaded brass, lead is prone to be dissolved in solid or gaseous form. Medical research has pointed out that lead has great damage to human hematopoietic and nervous systems, especially children's kidneys and other organs. All countries in the world attach gre...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C9/04
Inventor 李家德
Owner JIAXING IDC PLUMBING & HEATING TECH