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Preparing method capable of improving strength and toughness of Cu-Ni-Si alloy

A cu-ni-si, strong toughness technology, applied in the field of new materials, can solve the problems of low strength, poor toughness (plasticity), and cannot meet the requirements of high-end electronic connector materials, so as to achieve good strength and toughness and improve material toughness Effect

Active Publication Date: 2019-09-03
太原晋西春雷铜业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] This production process mainly has the following shortcomings: low strength, poor toughness (plasticity), and easy bending and cracking during subsequent bending processing, which cannot meet the use requirements of high-end electronic connector materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] (1) After the ingot is hot-rolled, the temperature of the first solution treatment is 730°C, and the cooling intensity is 30°C / s; face milling: the thickness of the single face milling face is 0.7mm;

[0017] (2) The processing rate of the first cold rolling is 82.1%, rolled to 2.5mm, and annealed in a bell-type annealing furnace, with a set temperature of 560°C and a holding time of 7h;

[0018] (3) The processing rate of the second cold rolling is 76%, rolling to 0.6mm, using a continuous heating furnace for the second solid solution, the solution temperature is 770°C, the solution time is 120s, and the cooling intensity is 25°C / s;

[0019] (4) The processing rate of the third cold rolling is 46.7%, rolling to 0.32mm, using a continuous heating furnace for the third solution, the solution temperature is 750°C, the solution time is 90s, and the cooling intensity is 25°C / s;

[0020] (5) The processing rate of the fourth cold rolling is 21.9%, rolling to 0.25mm, using a ...

Embodiment 2

[0023] (1) After the ingot is hot-rolled, the temperature of the first solution treatment is 750°C, and the cooling intensity is 30°C / s; face milling: the thickness of the single face milling face is 0.8mm;

[0024] (2) The processing rate of the first cold rolling is 84.6%, rolled to 2.0mm, and annealed in a bell-type heating furnace, with a set temperature of 550°C and a holding time of 6.5h;

[0025] (3) The processing rate of the second cold rolling is 70%, rolling to 0.6mm, using a continuous heating furnace for the second solution, the solution temperature is 760°C, the solution time is 100s, and the cooling intensity is 12°C / s;

[0026] (4) The processing rate of the third cold rolling is 66.7%, rolling to 0.2mm, using a continuous heating furnace for the third solution, the solution temperature is 760°C, the solution time is 100s, and the cooling intensity is 12°C / s;

[0027] (5) The processing rate of the fourth cold rolling is 25%, rolling to 0.15mm, using a bell-typ...

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Abstract

The invention belongs to the nonferrous metals processing industry, and particularly relates to a preparing method capable of improving strength and toughness of Cu-Ni-Si alloy. The process comprisesthe steps of semi-continuous casting ingot casting, casting ingot heating, hot rolling, solid-solution treatment (1), face milling, cold rolling (1), side cutting, annealing, cold rolling (2), solid-solution treatment (2), cold rolling (3), solid-solution treatment (3), cold rolling (4), cleaning, aging heat treatment, cleaning, stretching and straightening and slitting. According to the solid-solution treatment (1), the solid-solution temperature ranges from 700 to 850 DEG C, and the cooling strength is larger than 20 DEG C / s; according to annealing, the temperature ranges from 480 to 650 DEGC, and the heat preservation time ranges from four to eight hours; according to solid-solution treatment (2) (3), the solid-solution temperature ranges from 700 to 780 DEG C, the solid-solution timeranges from 90 to 150 s, and the cooling strength is larger than 10 DEG C / s; according to aging heat treatment, the temperature ranges from 400 to 500 DEG C, and the heat preservation time ranges from4 to 8 hours; and according to cold rolling (1) (2) (3) (4), the machining rate ranges from 20 to 85%. The method has the advantages that HV is 225 to 250, Rm is larger than or equal to 690 MPa, Rp0.2 is larger than or equal to 660 MPa, A50 is larger than or equal to 10%, and a strip is bent by 90 degrees and is free of cracking.

Description

technical field [0001] The invention relates to new materials and belongs to the non-ferrous metal processing industry, specifically a preparation method for improving the strength and toughness of Cu-Ni-Si alloys, improving the strength and toughness of copper-nickel-silicon strips to meet the development needs of electronic connector materials. Background technique [0002] Copper-nickel-silicon alloy strip products have the characteristics of high strength, high elasticity, medium conductivity, low stress relaxation, platability and excellent processing characteristics, and are mainly used in electrical connectors, large-scale and ultra-large-scale integrated circuits, and high-end terminals. Materials, precision relays, high-grade switches, etc. The copper alloy strip has the following composition (Ni: 2.2-4.2%; Si: 0.25-1.2%; Mg: 0.05-0.3%; the rest is copper and unavoidable impurities). [0003] At present, the production process generally adopted for copper-nickel-si...

Claims

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Application Information

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IPC IPC(8): C22C9/06C22F1/08
CPCC22C9/06C22F1/08
Inventor 李辉张文芹韩彩香景洁王满丰邢卫东
Owner 太原晋西春雷铜业有限公司
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