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High-efficiency short-process preparation method of high-strength high-conductivity copper alloy

A technology of copper alloys and alloying elements, which is applied in the field of preparation of high-strength and high-conductivity copper alloys, can solve the problems of large production costs and equipment investment, copper alloy performance needs to be improved, and low yield, so as to avoid stress cracking and high-strength characteristics , the effect of shortening the process

Active Publication Date: 2020-07-03
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The preparation methods of these high-strength and high-conductivity copper alloys all have the problems of many processes, high energy consumption, low yield, large production costs and equipment investment, and the performance of copper alloys needs to be improved.

Method used

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  • High-efficiency short-process preparation method of high-strength high-conductivity copper alloy
  • High-efficiency short-process preparation method of high-strength high-conductivity copper alloy
  • High-efficiency short-process preparation method of high-strength high-conductivity copper alloy

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Experimental program
Comparison scheme
Effect test

Embodiment 0

[0083] Embodiment 0: the preparation embodiment of forging high-temperature nickel-based alloy:

[0084] The alloy ingot is smelted by vacuum smelting + electroslag remelting process, the composition is: 0.05wt.%C, 15wt.%Cr, 6wt.%Mo, 5wt.%W, 2wt.%Ti, 5.5wt.%Al, the rest For you. After the alloy ingot was homogenized at 1250°C for 1h, it was formed by isothermal forging at 1000°C with a deformation of 80%. After that, it was kept at 800°C for 16 hours, quenched and tempered at 350°C for 1 hour, and the tensile properties of the alloy at room temperature to 800°C were tested. The results are shown in Table 1:

[0085] Table 1 High Temperature Mechanical Properties of Alloys

[0086] temperature / ℃ Tensile strength / MPa Yield strength / MPa Elongation / % room temperature 1200 1100 8 500 1220 1120 9 800 1280 1150 9

Embodiment 1

[0088] The first step: batching melting: according to the alloy composition of Cu-0.5wt.%Ag, batching is carried out, put into the melting furnace and fully melted, carry out sampling inspection and analysis of oxygen content and alloy element content, feed and fully deoxidize to within 10ppm according to the analysis results, The melt is introduced into the holding furnace through the inner guide groove of the melting furnace.

[0089] The second step: horizontal continuous casting: horizontal continuous casting is carried out under the side of the holding furnace, and two crystallizers with an interval of 400mm are arranged horizontally and installed under the side of the holding furnace. Group 1 cooling units are closest to the holding furnace. The reverse cooling method is adopted, and the temperature of the water inlet is lower than 20°C. The water flow V3 of the third group of cooling units is 2000L / min, the water flow V2 of the second group of cooling units is 2400L / mi...

Embodiment 2

[0096] Step 2: Horizontal continuous casting: 4 crystallizers are used with an interval of 200mm. The water flow V3 of the third cooling unit is 100L / min, and the water flow V2 of the second cooling unit is 120L / min. The water flow V1 of the unit is 150L / min, the electromagnetic stirring frequency used is 2Hz, and the cross-sectional area of ​​the blank is 50mm 2 , the extraction speed is 100mm / min, 30 atomizing nozzles are set, the distance between the nozzles is 20mm, the distance between the nozzle and the surface of the billet is 50mm, and the water pressure is 0.5MPa.

[0097] The third step: continuous extrusion: the rotation speed of the extrusion wheel is 8 rpm, the extrusion ratio is 8, and the extrusion gap is 2 mm. Set 25 atomizing nozzles, the interval between the atomizing nozzles is 20mm, the distance between the nozzle and the surface of the billet is 50mm, and the water pressure is 0.5MPa.

[0098] The fourth step: cold working: the deformation amount of each ...

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Abstract

The invention discloses a high-efficiency short-process preparation method of a high-strength high-conductivity copper alloy. The method comprises the following steps that (a), horizontal continuous casting is carried out to obtain an as-cast initial blank of the copper alloy, and alloy elements in the as-cast initial blank are kept in a supersaturated solid solution state; and (b), after the as-cast initial blank obtained in the step(a) is peeled, continuous extrusion, cold machining and aging annealing treatment are directly and sequentially carried out to obtain the copper alloy, and the alloy elements of the blank are kept in the supersaturated solid solution state in the continuous extrusion process. According to the method for continuously preparing the high-strength high-conductivity copper alloy, the process can be shortened, the energy consumption and the cost are reduced, the product forming rate is increased, and the high strength and the high conductivity of the copper alloy are guaranteed.

Description

Technical field: [0001] The invention relates to the technical field of nonferrous metal processing, in particular to a preparation method of a high-strength and high-conductivity copper alloy. Background technique: [0002] As a typical representative of conductor materials, copper alloys are widely used in the field of electrical engineering. With the development of the 5G information age, higher performance requirements are put forward for the key copper alloy conductors used. Taking large-scale integrated circuits as an example, due to the increasingly high level of circuit integration and continuous increase in power density, this requires copper alloys as integrated circuit lead frames to have not only high strength but also high electrical and thermal conductivity, so as to ensure the generation of Lowest possible thermal effect and fast heat dissipation. At the same time, in order to meet the requirements of the semiconductor process, the lead frame copper alloy mu...

Claims

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Application Information

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IPC IPC(8): C22C9/00C22C1/02B22D11/055B22D11/115B22D11/124C22F1/08
CPCC22C9/00C22C1/02B22D11/004B22D11/055B22D11/115B22D11/124C22F1/08C22F1/002C22C19/056C22C9/06B21C23/001B21C23/002B21C23/005Y02P10/25
Inventor 刘嘉斌王宏涛方攸同方晓阳
Owner ZHEJIANG UNIV
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