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A kind of copper-titanium alloy and preparation method thereof

A copper-titanium alloy and alloy technology, applied in the field of copper-titanium alloy and its preparation, can solve the problems of coarse grains and difficulty in eliminating coarse grains, and achieve the effect of simple process and avoiding a sharp drop in plasticity

Active Publication Date: 2021-12-07
JIANGXI UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of the above-mentioned related technologies, the inventor believes that there are the following technical defects: the above-mentioned process forms a supersaturated solid solution through hot rolling, first cold rolling, and solution treatment, and the temperature of solution treatment is 950-1000°C. It is easy to cause coarse grains, and even after the third cold rolling, second aging treatment and annealing treatment in the later stage, it is difficult to eliminate the defects of coarse grains

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  • A kind of copper-titanium alloy and preparation method thereof
  • A kind of copper-titanium alloy and preparation method thereof
  • A kind of copper-titanium alloy and preparation method thereof

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preparation example Construction

[0070] The preparation method of the invention is simple, and the copper-titanium alloy with a specific structure can be obtained through smelting and casting, thermal processing, primary solid solution, cold processing, secondary solid solution and aging of raw materials. High-temperature short-time annealing treatment makes the prepared structure have ultra-fine grain composition. The alloy grains are mixed crystals composed of 10-30 μm coarse grains and 5 μm ultra-fine grains, and 80% of the grains are less than 5 μm; rapid heating After annealing, 80% of the ultrafine grains in the prepared grain structure are smaller than 2 μm, including sub-grains, nano-twins, and the like.

[0071] The elastic copper-titanium alloy prepared by the method of the invention is a plate, a strip, a bar, a wire or a foil.

Embodiment 1-4

[0076] The copper-titanium alloy preparation method of embodiment 1-4 is:

[0077] Melting and casting: Weigh 10kg of raw materials such as pure titanium or Cu-50Ti intermediate alloy, pure iron, electrolytic copper, and pure vanadium according to the designed composition, put them into a vacuum melting furnace lined with graphite, and evacuate to 10Pa And fill with a certain amount of argon to protect and raise the temperature to 1300 ℃, after the furnace material is completely melted, keep it warm for 20 minutes, and then cast it into an ingot in the furnace.

[0078] Hot processing and primary solid solution: heat the ingot to 900°C in a box furnace, keep it warm for 2 hours, and then carry out hot rolling with a rolling rate of 90%. After hot rolling, a plate is obtained. The final temperature of rolling is 650°C. The plate obtained by hot rolling is placed in a resistance furnace, kept at 900°C for 20 minutes, taken out and immediately water-cooled as a solid solution tre...

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Abstract

This application relates to the technical field of copper-titanium alloys, and specifically discloses a copper-titanium alloy and a preparation method thereof. The elemental composition of the copper-titanium alloy contains Ti: 2.5-5.0wt%; Fe: 0.05-0.5wt%; V+Nb+ Hf+Ta: 0.05-0.5wt%, wherein more than one of V, Nb, Hf or Ta is selected; rare earth element: 0-0.1wt%, the rare earth element is at least one of Ce, La, Sc and Y; the rest Cu and its unavoidable impurities, the sum of the contents of each component is 100%; the structure of the alloy includes a matrix phase and a strengthening phase distributed in the matrix phase; wherein, the number of grains in the matrix phase has at least 80% of the grains The grains are ultrafine crystals, and the grain size of the ultrafine crystals is 5 μm or less. The tensile strength of the copper-titanium alloy prepared by the present application reaches 1000 MPa, and the elongation reaches 10%, which meets the high-strength and high-plasticity requirements of titanium-copper and the bending process requirements.

Description

technical field [0001] The invention relates to the technical field of copper alloys, in particular to a copper-titanium alloy and a preparation method thereof. Background technique [0002] Due to the characteristics of high electrical conductivity, high strength, and high elasticity, copper alloys are widely used in the electrical and electronic industries, and have gradually developed into necessary materials for instruments, elastic components, electrical and heat conduction, connectors and other devices. With the process of intelligentization and integration of information products, especially the development of the 5G industry, the high integration of electronic devices makes copper alloy components lighter, thinner and shaped, and puts forward higher strength and higher plasticity requirements for copper alloys. Among the high-strength elastic copper alloys, Cu-Be, Cu-Ti and Cu-Ni alloys are three-legged. Cu-Be alloys have the disadvantages of toxic oxides, high cost...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C9/00C22F1/08
CPCC22C9/00C22F1/08
Inventor 杨斌刘位江肖翔鹏汪航刘柏雄张建波
Owner JIANGXI UNIV OF SCI & TECH
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