Anticorrosion white Cu-Mn alloy and method for making its wire material

A technology of copper-manganese alloy and manufacturing method, which is applied in the field of corrosion-resistant white copper-manganese alloy and its wire rod manufacturing, can solve the problems of not considering the influence of Al and Sn colors, not giving the lightness L* value, not being suitable for large-scale production, etc. , to achieve the effect of good cold and hot processing performance, good discoloration resistance and cost reduction

Inactive Publication Date: 2002-02-06
中铜(上海)铜业有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

(2) The influence of Al and Sn on color is not considered, and the functions and contents of Al and Sn are confused
(3) The lightness L* value is not given, because L* reflects the reflection characteristics of the alloy to visible light, L* is equal to zero, representing black; L* is equal to 100, representing white
(4) The patent is only a laboratory-scale research and is not suitable for large-scale production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The alloy composition (percentage by weight) is: 14% Mn, 13% Zn, 0.8% Al, 1.2% Sn, 0.02% Ce, and the balance is copper. 150kg intermediate frequency furnace for non-vacuum smelting, 300Kg low frequency furnace for heat preservation, cryolite refining and slag removal, casting temperature is 1050-1150℃, and three wire billets of φ12mm are continuously cast on a horizontal continuous casting machine. The wire billet was cold-drawn into a Φ2.6mm semi-finished billet, annealed at 700°C for 240 minutes, and then soaked in pickling solution (75%H 2 SO 4 +25%HNO 3 ) pickling. Then flattened (3.65mm×1.05mm) and stretched to a flat wire blank with a size of 3.3mm×0.9mm, annealed at 670°C for 210 minutes and pickled, and finally cold-drawn into a 3.2mm×0.75mm zipper finished wire , The flat wire is of good quality. The alloy structure is α-single phase, and the processing performance is excellent. The surface of the alloy is silvery white, and the color quantitative test sho...

Embodiment 2

[0023] The alloy composition (percentage by weight) is: 14% Mn, 12% Zn, 1.4% Al, 0.6% Sn, 0.005% Ce, and the balance is copper. According to the conventional manganese brass melting and casting process, it is melted in a 150kg intermediate frequency furnace without vacuum, kept in a 300Kg low frequency furnace, and refined with cryolite to remove slag. The casting temperature is 1050-1150°C, and the wire billet of φ12 is continuously cast horizontally. The wire billet is cold-drawn into a semi-finished billet of Φ3.9mm, annealed at 750°C for 120 minutes, and pickled by pickling solution (75%H 2 SO 4 +25%HNO 3) pickling, then cold rolling and stretching into a flat wire billet of 4.75mm×1.5mm, after annealing at 710°C for 150 minutes, pickling, and finally cold drawing into a zipper finished wire rod of 4.6mm×1.25mm, the quality of the wire rod is excellent . The alloy has an α single-phase structure and good processing performance. The surface is silvery white. Quantitativ...

Embodiment 3

[0025] The alloy composition (percentage by weight) is: 11% Mn, 6% Zn, 1% Al, 0.01% Ce, and the balance is copper. According to the conventional manganese brass melting and casting process, it is melted in a 150kg intermediate frequency furnace without vacuum, kept in a 300Kg low frequency furnace, and refined with cryolite to remove slag. The casting temperature is 1050-1150°C, and the wire billet of φ12 is continuously cast horizontally. The wire billet is cold-drawn into a semi-finished billet of Φ3.9mm, annealed at 720°C for 200 minutes, and pickled by pickling solution (75%H 2 SO 4 +25%HNO 3 ) pickling, then flattened and stretched to a flat wire billet of 4.75mm×1.5mm, annealed at 690°C for 200 minutes, pickled, and finally cold-drawn into a finished zipper wire of 4.6mm×1.25mm. The quality of the wire is excellent. The alloy is α-single-phase structure and has good cold and hot workability. The surface is silvery white, and the chroma parameters are: L*=70.36, a*=2.0...

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Abstract

An anticorrosion white Cu-Mn alloy contains Mn (9-15 wt.%), Zn (4-15 wt.%), Al (0.5-1.5 wt.%), Sn (0-1.5 wt.%) rare-earth element (less than 0.2 wt.%), and Cu (the rest). Said alloy can be used to make wire material through non-vacuum smelting, horizontal conticasting and cold drawing or cold rolling. Its advantages are high machinability and anticorrosion nature and stable lustre. It can replace Ni-contained white Zn-Cu alloy.

Description

technical field [0001] The invention relates to a corrosion-resistant white copper-manganese alloy and a method for manufacturing the wire thereof. The product can replace nickel-containing zinc white copper, and is used for manufacturing zippers, watch chains, watch cases, decorative handicrafts, etc., and belongs to the technical field of new materials. Background technique [0002] As we all know, white copper is a copper alloy with nickel as the main alloying element. White copper, especially zinc white copper (Cu-Ni-Zn) not only has a silvery white appearance, but also has excellent corrosion resistance, high strength and good process performance. , Widely used in the manufacture of zippers, watch bracelets and watch cases, as well as decorative handicrafts and other objects in contact with the human body. [0003] Studies have found that long-term contact with nickel-containing materials has sensitization and carcinogenic effects on the human body. The use of nickel-c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C9/05
Inventor 梅品修姜功正庾诚吴建生张津徐张玉平
Owner 中铜(上海)铜业有限公司
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