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Brass alloy and preparation method thereof

A technology of brass alloy and brass, which is applied in the field of brass alloy and its preparation, can solve the problems of poor cold riveting performance of materials, and achieve the effects of improving riveting performance, improving electrical conductivity, and increasing critical current density

Active Publication Date: 2022-01-28
JINTIAN COPPER GROUP CORP NINGBO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Tin-containing (tin content is about 0.8wt%) lead-free brass has good resistance to dezincification corrosion. Brass has a large amount of γ hard phase in its internal structure, and it is easy to damage the knife during turning. Generally, the hardness can reach Above HV180, the cold riveting performance of the material is poor

Method used

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  • Brass alloy and preparation method thereof
  • Brass alloy and preparation method thereof
  • Brass alloy and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037]1) Melting: According to the required composition ratio, the raw materials used include electrolytic plates, indium ingots, tin ingots, pure nickel, zinc ingots, and lanthanum-cerium alloys. The raw materials are sequentially added into the industrial frequency furnace to raise the temperature, and the melting temperature is controlled at 990°C.

[0038] 2) Casting: The horizontal continuous casting process is used to produce ingots, in which the traction pitch: 35mm; reverse thrust pitch: 2mm; traction speed: 12mm / s; reverse thrust speed: 2mm / s. Ingot specification: φ145mm.

[0039] 3) Extrusion: the ingot is heated before extrusion, and the heating process is carried out in three stages. Preheating stage: temperature controlled at 300°C, heating time 25min; heating stage: temperature controlled at 600°C, heating time 30min; holding stage: 710°C, heating time 30min. Use the 1800t extruder to extrude the blank with the specification of φ8mm.

[0040] 4) Disk drawing: ...

Embodiment 2

[0045] 1) Melting: According to the required composition ratio, the raw materials used include electrolytic plates, indium ingots, tin ingots, pure nickel, zinc ingots, and metal magnesium. The raw materials are sequentially added into the power frequency furnace to raise the temperature, and the melting temperature is controlled at 980°C.

[0046] 2) Casting: The horizontal continuous casting process is used to produce ingots, in which the traction pitch: 36mm; reverse thrust pitch: 2mm; traction speed: 14mm / s; reverse thrust speed: 2mm / s. Ingot specification: φ145mm.

[0047] 3) Extrusion: the ingot is heated before extrusion, and the heating process is carried out in three stages. Preheating stage: temperature controlled at 280°C, heating time 25min; heating stage: temperature controlled at 580°C, heating time 30min; holding stage: 680°C, heating time 20min. Use the 1800t extruder to extrude the blank with the specification of φ7.5mm.

[0048] 4) Disk drawing: After pick...

Embodiment 3

[0053] 1) Melting: According to the required composition ratio, the raw materials used include electrolytic plates, indium ingots, tin ingots, pure nickel, zinc ingots, metal manganese and copper-zirconium alloys. The raw materials are sequentially added into the industrial frequency furnace to raise the temperature, and the melting temperature is controlled at 1000°C.

[0054] 2) Casting: The horizontal continuous casting process is used to produce ingots, in which the traction pitch: 38mm; reverse thrust pitch: 2mm; traction speed: 12mm / s; reverse thrust speed: 2mm / s. Ingot specification: φ145mm.

[0055] 3) Extrusion: the ingot is heated before extrusion, and the heating process is carried out in three stages. Preheating stage: temperature control at 300°C, heating time 30min; heating stage: temperature control at 580°C, heating time 20min; holding stage: 680°C, heating time 25min. Use the 1800t extruder to extrude the blank with the specification of φ7.8mm.

[0056] 4) ...

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Abstract

The invention discloses a brass alloy and a preparation method thereof. The brass alloy comprises the following components in percentage by mass: 61-65wt% of Cu, less than 0.1wt% of Pb, 0.1-1.0wt% of In, 0.2-0.5wt% of Sn, 0.1-0.5wt%of Ni and the balance being Zn and inevitable impurities. According to the brass alloy provided by the invention, low tin is adopted, and tin content ranges from 0.2 wt% to 0.5 wt%; compared with high-tin brass, content of gamma hard phases in a matrix is reduced, and the tool damage situation during turning is reduced; a certain amount of In elements are added, the In elements similar to Pb, Bi and the like have certain free-cutting capabilities, and can be combined with Sn elements under certain conditions to form gamma-In low-melting-point brittle phases which are dispersed and distributed on an alpha and beta phase boundary; and heat is generated during material cutting, and the gamma-In phases are melted under the heat to play a cutting role, so that the problem of insufficient hard phase generated by low Sn is solved, cutting is facilitated, and the overall machinability of materials is further improved.

Description

technical field [0001] The invention belongs to the technical field of copper alloys, in particular to a brass alloy and a preparation method thereof. Background technique [0002] Brass alloy has good cold and hot processing performance and low cost of use. Therefore, the electrical plugs on the market are basically made of brass materials. Taking a rounded plug as an example, most of the production is processed by "high-speed turning, drilling → electroplating", and the material is required to have good cutting performance, cold riveting performance, straightness, electroplating performance and electrical conductivity. Currently commonly used brass alloy grades are H62 and C3602. Among them, leaded brass represented by C3602 has good cutting performance. However, with the improvement of human health awareness, lead-free will inevitably become the future development trend. The H62 material is low-lead and environmentally friendly, and has good cold riveting performance, b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C9/04C22F1/08C22C1/02C22C1/03
CPCC22C9/04C22F1/08C22C1/02C22C1/03
Inventor 郑恩奇叶东皇傅杰
Owner JINTIAN COPPER GROUP CORP NINGBO
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