Semi-continuous preparation process of large-size C70250 copper alloy cast ingot

A preparation process and copper alloy technology, which is applied in the semi-continuous preparation process of large-size C70250 copper alloy ingots, can solve the problems of large fluctuations in the composition of Mg, an oxygen-prone element, and achieve uniform performance, control of dispersion, and uniform composition. Effect

Inactive Publication Date: 2021-08-20
TAIYUAN JIN XI CHUNLEI COPPER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the deficiencies of the prior art and solve the technical problem of large fluctuations in the composition of the easy oxygen element Mg in the non-vacuum semi-continuous casting process of large-size C70250 copper alloy ingots, the present invention provides a semi-continuous preparation of large-size C70250 copper alloy ingots process to ensure the composition uniformity of large-size ingots and improve the quality of large-size ingots

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A semi-continuous preparation process for large-size C70250 copper alloy ingots, comprising the following steps:

[0035] S1. Prepare standard electrolytic copper 3000Kg, nickel 90Kg, silicon 19.5Kg, copper-magnesium master alloy (containing Mg10%) 80Kg and C70250 copper alloy scrap 2500Kg according to the raw materials and their mass percentage content;

[0036] S2. Raw material smelting:

[0037] First, add standard electrolytic copper and C70250 copper alloy scraps to the intermediate frequency induction furnace, set the heating temperature of the intermediate frequency induction furnace to 1250 ° C, start the intermediate frequency induction furnace to start heating; then, add nickel and silicon into the intermediate frequency induction furnace until The intermediate frequency induction furnace is heated to above 1200°C, the filler in the intermediate frequency induction furnace is completely melted and becomes liquid, and then stirred evenly; finally, the liquid su...

Embodiment 2

[0050] A semi-continuous preparation process for large-size C70250 copper alloy ingots, comprising the following steps:

[0051] S1. Prepare standard electrolytic copper 4000Kg, nickel 112Kg, silicon 25Kg, copper-magnesium master alloy 90Kg and C70250 copper alloy scrap 1500Kg according to raw materials and their mass percentage content;

[0052] S2. Raw material smelting:

[0053] First, add standard electrolytic copper and C70250 copper alloy scraps to the intermediate frequency induction furnace, set the heating temperature of the intermediate frequency induction furnace to 1270°C, start the intermediate frequency induction furnace to start heating; then, add nickel and silicon into the intermediate frequency induction furnace until The intermediate frequency induction furnace is heated to above 1200°C, the filler in the intermediate frequency induction furnace is completely melted and becomes liquid, and then stirred evenly; finally, the liquid surface of the molten raw ma...

Embodiment 3

[0065] A semi-continuous preparation process for large-size C70250 copper alloy ingots, comprising the following steps:

[0066] S1. Prepare standard electrolytic copper 3800Kg, nickel 100Kg, silicon 27Kg, copper-magnesium master alloy 93Kg and C70250 copper alloy scrap 1700Kg according to raw materials and their mass percentage content;

[0067] S2. Raw material smelting:

[0068] First, add standard electrolytic copper and C70250 copper alloy scraps to the intermediate frequency induction furnace, set the heating temperature of the intermediate frequency induction furnace to 1300°C, start the intermediate frequency induction furnace to start heating; then, add nickel and silicon into the intermediate frequency induction furnace until The intermediate frequency induction furnace is heated to above 1200°C, the filler in the intermediate frequency induction furnace is completely melted and becomes liquid, and then stirred evenly; finally, the liquid surface of the molten raw ma...

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Abstract

The invention discloses a semi-continuous preparation process of a large-size C70250 copper alloy ingot, belongs to the technical field of large-size C70250 copper alloy casting, and solves the technical problem of large fluctuation of an oxygen-prone element Mg component in a non-vacuum semi-continuous casting process of the large-size C70250 copper alloy ingot. The preparation process comprises the following steps of burdening, raw material smelting, primary element content analysis, component adjustment, secondary element content analysis, converter treatment, addition of a copper-magnesium intermediate alloy into a heat preservation furnace, stirring until the copper-magnesium intermediate alloy is completely molten, tertiary element content analysis, casting, compensation and furnace post-analysis. According to the preparation process provided by the invention, the adding sequence of the Cu-Mg intermediate alloy is changed, the method that the Cu-Mg intermediate alloy is added in a compensation mode in the casting process is adopted, the scattering difference of the content of the element Mg prone to oxidation and burning loss in the large-length C70250 copper alloy cast ingot is effectively controlled, and it is guaranteed that the components of the C70250 copper alloy cast ingot are uniform.

Description

technical field [0001] The invention belongs to the technical field of large-size C70250 copper alloy casting, and in particular relates to a semi-continuous preparation process for large-size C70250 copper alloy ingots. Background technique [0002] C70250 copper alloy strip products have the characteristics of high strength, good electrical conductivity, high temperature softening resistance and thermal relaxation, and are widely used in electronic fields such as lead frames, elastic components, micro terminals, and connecting device materials. The preparation of C70250 copper alloy ingot is the first process of the alloy strip production, and the uniformity and stability of its composition is very important to the performance and stability of the finished strip. C70250 copper alloy ingot is composed of the following elements: Ni: 2.2-4.2%, Si: 0.25-1.25%, Mg: 0.05-0.3%, Cu: ≥96.5%, and the rest are unavoidable impurities. At present, the production process generally adop...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/03B22D7/00B22D11/18C22C9/06
CPCC22C1/03B22D7/005B22D11/004B22D11/18C22C9/06
Inventor 张文芹吕显龙韩彩香王琦景洁
Owner TAIYUAN JIN XI CHUNLEI COPPER CO LTD
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