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A kind of aging strengthened copper alloy strip and its preparation method

A technology of copper alloy strip material and aging strengthening, which is applied in the field of copper alloy material and technology, can solve the problems such as the unsatisfactory performance of copper alloy strip material, and achieve improved brazing and electroplating performance, high temperature softening resistance, and component distribution. more effective than scientifically reasonable

Active Publication Date: 2019-11-08
JINTIAN COPPER GROUP CORP NINGBO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the performance of the copper alloy strip prepared above is not very ideal, so it is necessary to design an aging-strengthened copper alloy strip with a scientific ratio and good performance as an ideal lead frame material

Method used

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  • A kind of aging strengthened copper alloy strip and its preparation method

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Effect test

Embodiment 1

[0032] An aging-strengthened copper alloy strip and a preparation method thereof, the steps of which are:

[0033] 1) Batching and smelting: weighing according to the component distribution ratio, adding Si, Ni, Cr, Zn, Cu into the melting furnace to heat up and melt;

[0034] 2) Add Mg for deoxidation treatment, control the temperature at 1280 ° C, and start to transfer to the holding furnace after standing still for 5 minutes. Add 0.05% Mg in the holding furnace for half an hour;

[0035] 3) When the temperature of the holding furnace reaches the casting temperature of 1260°C, the horizontal continuous casting red ingot casting technology is adopted, the thickness of the slab is 16mm, the casting speed is controlled at 160-300mm / min, and the outlet temperature of the slab is controlled at 650°C-780°C. Strong cooling water (water pressure 0.5MPa, outlet water temperature 30°C) is used to carry out online quenching and solid solution cooling of the casting billet at 100mm fro...

Embodiment 2

[0048] An aging-strengthened copper alloy strip and a preparation method thereof, the steps of which are:

[0049] 1) Batching and smelting: weighing according to the component distribution ratio, adding Si, Ni, Cr, Zn, Cu into the melting furnace to heat up and melt;

[0050] 2) Add Mg for deoxidation treatment, control the temperature at 1305 ° C, and start to transfer to the holding furnace after standing still for 5 minutes. Add 0.04% Mg in the holding furnace for half an hour.

[0051] 3) When the temperature of the holding furnace reaches the casting temperature of 1275°C, the horizontal continuous casting red ingot casting technology is adopted, the thickness of the slab is 16mm, the casting speed is controlled at 160-300mm / min, and the outlet temperature of the slab is controlled at 650°C-780°C. Strong cooling water (water pressure 0.4MPa, outlet water temperature 20°C) is used to carry out online quenching and solid solution cooling of the casting slab at 100 mm from...

Embodiment 3

[0064] An aging-strengthened copper alloy strip and a preparation method thereof, the steps of which are:

[0065] 1) Batching and smelting: weighing according to the component distribution ratio, adding Si, Ni, Cr, Zn, Cu into the melting furnace to heat up and melt;

[0066] 2) Add Mg for deoxidation treatment, control the temperature at 1270°C, and start to transfer to the holding furnace after standing still for 5 minutes, cover with calcined charcoal that has been held at 600°C for 5 hours, and the covering thickness is 100mm. Add 0.04% Mg in the holding furnace for half an hour;

[0067] 3) When the temperature of the holding furnace reaches the casting temperature of 1250°C, the horizontal continuous casting red ingot casting technology is adopted, the thickness of the drawing cast billet is 16mm, the drawing casting speed is controlled at 160-300mm / min, and the outlet temperature of the billet is controlled at 650°C-780°C. Strong cooling water (water pressure 0.6MPa, ...

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Abstract

The invention relates to an ageing strengthening copper alloy strip. The copper alloy strip is composed of components including, by weight, 0.4%-1.3% of Si, 2%-4.5% of Ni, 0.06%-0.2% of Cr, 0.2%-0.8%of Zn, 0.05%-0.2% of Mg and the balance copper and inevitable trace impurities. Preparing steps include that burdening and smelting are carried out; Mg is added for deoxygenation treatment; when the temperature of a holding furnace reaches the casting temperature being 1220 DEG C-1300 DEG C, and a horizontal continuous casting red ingot casting technology is adopted; face milling, rough rolling and solution treatment are carried out; intermediate rolling is carried out after surface washing; second solid solution is carried out; finished product finish rolling is carried out after surface washing; finished product aging is carried out; surface washing and surface grinding polishing are carried out; and finished stripping, checking and packaging are carried out. The ageing strengthening copper alloy strip has the good processability and casting performance, has the advantages of high strength, high elasticity, high conductivity, excellent resistance to high temperatures and good stressrelaxation resistance and is an ideal material for a lead frame, and the preparing technology is simple.

Description

technical field [0001] The invention belongs to the technical field of copper alloy materials and processes, in particular to an aging-strengthened copper alloy strip and a preparation method thereof. Background technique [0002] Lead frame copper alloy strip is the supporting skeleton of integrated circuits. With the miniaturization, precision and high performance of electrical components, the lead frame materials used should have high strength, high elasticity, high conductivity and excellent high temperature resistance. Stress relaxation properties. [0003] After investigation, the existing Chinese invention patent No. 200810018995.9 "Production method of high-strength, high-lead wire frame copper alloy strip", its chemical composition: Fe0.8~1.2%, P0.01~0.04%, balance Cu; or Fe2.1~2.6%, P0.015~0.15%, Zn0.05~0.2%, the content of Pb and Sn is not more than 0.03%, the balance Cu; preparation steps; 1158~1218℃; continuous extrusion: straighten the copper rod, enter the i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C9/06C22C1/02C22F1/08B22D11/16
CPCB22D11/16C22C1/02C22C9/06C22F1/08
Inventor 曾力维李正巢国辉裘桂群华称文
Owner JINTIAN COPPER GROUP CORP NINGBO
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