Easily-cutting brass and processing method of strips thereof

A technology of easy cutting and brass strips, which is applied in the field of processing brass and its strips, can solve problems such as physical health threats and non-compliance, and achieve the effects of recycling and improving hardness

Inactive Publication Date: 2010-02-24
ANHUI CHUJIANG TECHCAL NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The brass usually used to produce keys is Hpb59-1 lead brass, its chemical weight composition is: copper: 57.0% ~ 60.0%; lead: 0.8% ~ 1.9%; nickel: 1.0%; iron: ≤0.5%; impurities The sum ≤ 1.0%, zinc: the balance, it has high strength and excellent machinability, because Hpb59-1 lead brass contains 0.8% ~ 1.9% lead, there is a great threat to human health, does not meet Modern environmental requirements

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Production process of free-cutting brass:

[0027] 1. Smelting and drawing casting process: Melting nickel-plated copper, brass, red copper, and zinc ingots. The weight ratio of nickel-plated copper material, H59 brass return material, and red copper material bag in the raw materials is 4:5:1, and the zinc ingot is based on the main Ingredient control needs to be added in an appropriate amount.

[0028] Its chemical weight composition is: copper: 59.5%, lead: 0.03%, tin: 0.4%, nickel: 0.4%, other impurity elements: 0.18%, and the balance is zinc.

[0029] 2. Hot rolling process: Mill the smelted copper ingot to make it thick to 66mm, heat it to 930°C with a gas ring furnace, and use a 7-pass hot rolling process: 66mm -49mm-32mm-21mm-16.5mm-9mm-6mm-4.6mm, the hot rolling processing rate is 93%;

[0030] 3. Rough rolling process: use 2 cold rolling processes: 4.6mm-3.0mm-2.5mm, and the cold rolling processing rate is 45.7%;

[0031] 4. Annealing process: anneal the rou...

Embodiment 2

[0036] Except 1. Smelting and drawing casting process: Melting nickel-plated copper, brass, red copper, and zinc ingots. Among the raw materials, the weight ratio of cupronickel-plating material, H59 brass return material, and red copper material bag is 4:4:2, and zinc ingots are added in an appropriate amount according to the main component control.

[0037] Its chemical composition is: copper: 58%, lead: 0.04%, tin: 0.35%, nickel: 0.43%, other impurity element: 0.2%, the balance is zinc, except that all the other are identical with embodiment 1.

Embodiment 3

[0039] Except 1. Smelting and drawing casting process: Melting nickel-plated copper, brass, red copper, and zinc ingots. Among the raw materials, the white copper plating material, the H59 brass return material, and the red copper material package weight ratio are 3.5:4.5:2, and zinc ingots are added in an appropriate amount according to the main component control.

[0040] Its chemical composition is: copper: 60%, lead: 0.05%, tin: 0.3%, nickel: 0.4%, other impurity element: 0.15%, the balance is zinc, except that the rest is the same as embodiment 1.

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PUM

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Abstract

The invention discloses an easily-cutting brass and a processing method of strips thereof, wherein the brass comprises the following ingredients in percentage by weight: 57-60 percent of Cu, less thanor equal to 0.05 percent of Pb, less than or equal to 0.7 percent of Sn, 0.5-0.6 percent of Ni, less than or equal to 0.2 percent of impurity elements, and the balance of Zn. The processing method ofstrips of the brass comprises the working procedures of smelting and continuous casting, hot rolling, rough rolling, annealing, first acid-washing, fine rolling and second acid-washing. Compared withthe prior art, the copper alloy of the invention can substitute the prior Hpb59-1 lead brass, achieves the environmental protection of a key strip and takes white-plated materials as raw materials for producing, thereby the recycling problem of the white-plated materials is solved, and the processing ratio is increased by utilizing the characteristics of hard and crisp (Alpha plus Beta) two-phaseorganization in the alloy and the solution strengthening of Sn and Ni elements so as to improve the hardness and the strength of copper alloy products.

Description

Technical field: [0001] The invention belongs to a processing method of free-cutting brass and strip material, in particular to a processing method of brass and strip material which are used for key production and can replace Hpb59-1 lead. Background technique: [0002] The brass usually used to produce keys is Hpb59-1 lead brass, its chemical weight composition is: copper: 57.0% ~ 60.0%; lead: 0.8% ~ 1.9%; nickel: 1.0%; iron: ≤0.5%; impurities The sum ≤ 1.0%, zinc: the balance, it has high strength and excellent machinability, because Hpb59-1 lead brass contains 0.8% ~ 1.9% lead, there is a great threat to human health, does not meet Modern environmental protection requirements. Contents of the invention [0003] The first technical problem to be solved by the present invention is to provide an environmentally friendly free-cutting brass. [0004] The second technical problem to be solved by the present invention is the processing method of the above-mentioned brass str...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C9/04C22C1/02C22F1/08
Inventor 吴德顺刘先国胡勇黄咸胜朱平
Owner ANHUI CHUJIANG TECHCAL NEW MATERIAL CO LTD
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