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Elastic copper-titanium alloy and preparation method thereof

A copper-titanium alloy, elastic technology, applied in the field of elastic copper-titanium alloy and its preparation, can solve the problems of high price, poor working stability, shortened service life, etc., achieve high dislocation density and activation energy, and improve resistance to stress relaxation properties, promotion of formation and precipitation

Active Publication Date: 2020-10-02
NINGBO XINGYE SHENGTAI GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, beryllium copper is a non-environmentally friendly alloy, and its production process will endanger human health and pollute the environment; and its production process is complicated, the cost is high, and the price has remained high
At the same time, beryllium bronze does not have the ability to resist stress relaxation at high temperatures, and its working stability is poor at higher temperatures, making its service temperature lower than 150°C; it has been gradually replaced by QSn10-0.3 high-tin phosphor bronze alloy
The strength of QSn10-0.3 can reach 950~1100MPa, and it has good elongation and certain bending performance, but because it is a work hardening alloy, there is obviously a processing texture, and its bending performance is lower than that of Precipitation-strengthened alloy, which makes it impossible to meet the needs of multiple scenarios. At the same time, due to the low stress relaxation rate, the service life of the product is greatly shortened. At the same time, the conductivity of the phosphor bronze alloy is only 9% IACS, so that the product cannot take care of some signals. Transmission and application scenarios are greatly limited; especially with the advent of the 5G commercial era, the shortage of high-tin phosphorus bronze alloys has been further amplified, making it difficult to support the development of information technology

Method used

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  • Elastic copper-titanium alloy and preparation method thereof
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preparation example Construction

[0024] The invention provides a method for preparing an elastic copper-titanium alloy, comprising the following steps:

[0025] Corresponding to the elemental composition of the elastic copper-titanium alloy, the metal raw materials are melted and cast to obtain ingots;

[0026] performing hot rolling, first cold rolling, solution treatment, third cold rolling, second aging treatment and annealing treatment on the ingot in sequence to obtain an elastic copper-titanium alloy;

[0027] In terms of mass percentage, the element composition of the elastic copper-titanium alloy includes Ti: 2.4-3.5%, Cr: 0.02-0.2%, Ni: 0.02-0.5%, Si: 0.05-0.1%, rare earth elements 0-0.05% %, the rest is Cu.

[0028] The invention corresponds to the composition of the elastic copper-titanium alloy, and melts and casts various metal raw materials to obtain ingots. In the present invention, in terms of mass percentage, the element composition of the elastic copper-titanium alloy includes Ti: 2.4-3.5%...

Embodiment 1

[0052] The composition of the alloy is shown in Example 1 of Table 1.

[0053] 1. Melting: Add electrolytic copper, pure titanium, copper-chromium alloy, copper-silicon alloy and metal nickel into the vacuum melting furnace, raise the temperature to 1250°C, and after the melt is completely melted, add covering agent and keep it warm for 10 minutes. After airing and removing impurities, keep it warm for 8 minutes, then fully stir it, let it stand for 5 minutes, and then cast it out of the furnace. The casting temperature is 1230°C.

[0054] 2. Hot rolling: heat the above-mentioned alloy ingots in a stepping box furnace at a temperature of 900°C and a holding time of 3 hours, then carry out hot rolling with a rolling rate of 90% and control the final rolling temperature at 760°C , followed by water cooling.

[0055] 3. The first cold rolling: the alloy plate after face milling is first rolled, and the cold rolling rate is 70%.

[0056] 4. On-line high-temperature rapid solutio...

Embodiment 2~10

[0061] The difference from Example 1 lies in the elemental composition (see Table 1 for details) and the preparation process, wherein the preparation process is shown in Table 2, and the conditions of the unlisted parts are the same as in Example 1.

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Abstract

The invention relates to the technical field of copper alloys, and in particular to an elastic copper-titanium alloy and a preparation method thereof. The preparation method of the elastic copper-titanium alloy comprises the steps of melting and casting metal raw materials to obtain an ingot according to the composition of the elastic copper-titanium alloy; and sequentially performing hot rolling,first cold rolling, solution treatment, third cold rolling, second aging treatment and annealing treatment on the ingot to obtain the elastic copper-titanium alloy. The elastic copper-titanium alloyis prepared from the components in percentage by mass: Ti: 2.4% to 3.5%; Cr: 0.02% to 0.2%; Ni: 0.02% to 0.5%; Si: 0.05% to 0.1%, rare earth elements: 0% to 0.05%, and the balance of Cu. By changing the particle structure of the precipitated phase to match the composition of the copper-titanium alloy, the prepared elastic copper-titanium alloy has high strength, high elongation, high electrical conductivity, low stress relaxation rate, and good bending resistance.

Description

technical field [0001] The invention relates to the technical field of copper alloys, in particular to an elastic copper-titanium alloy and a preparation method thereof. Background technique [0002] Ultra-high-strength elastic copper alloy is an indispensable material in precision instruments and precision machinery. It is widely used in the manufacture of various elastic components, such as bellows, diaphragm capsules, pressure spring tubes, resonant elastic components, heat-sensitive bimetallic springs, leaf springs and coil springs, etc. In instruments and meters and various measuring devices, the performance of elastic components determines the accuracy, reliability and life of the instrument as a whole. [0003] The representative of ultra-high-strength conductive elastic alloys is beryllium bronze, which is widely used in various fields because of its excellent comprehensive properties such as electrical conductivity, strength, corrosion resistance, and wear resistan...

Claims

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Application Information

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IPC IPC(8): C22F1/08C22C9/00C22C1/02
CPCC22C1/02C22C9/00C22F1/08
Inventor 刘峰马吉苗雷伏庆陈军陈海清蒋志晶王磊郑芸郁晓芸陈佳程
Owner NINGBO XINGYE SHENGTAI GROUP
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