High-strength high elasticity Cu-Ti alloy and its preparing process

Abstract

The invention discloses a method for producing Cu-Ti alloy with high strength and high elasticity, comprising Ti:3.0-4.0wt%, the third element groups: 0.01-0.5wt%. Said method comprises following steps: adding main and auxiliary material to non- vacuum medium-frequency induction furnace, fusion casting with the protection of inert gas; rolling the got casting billet, controlling finishing rolling temperature of hot rolling and intermediate annealing temperature of cold rolling to be higher than alloy solvus, solution treatment or recrystallization anneal treatment at 750 -850 Deg. C, aging treating at 350 -450 Deg. C for 5-20 hours. This invention is characterized in that the phase structure and grain size of alloy are controlled through proper production process, and the comprehensive properties of alloy are greatly improved.

Description

technical field [0001] The invention relates to a Cu-Ti alloy, in particular to a high-strength and high-elasticity Cu-Ti alloy and a manufacturing method thereof, belonging to the technical field of non-ferrous metals. Background technique [0002] Nowadays, electronic products are becoming smaller and lighter, and electronic components are also miniaturized and lightened. Therefore, the thickness of the connector is getting thinner and thinner, and the contact area is getting smaller and smaller. This requires higher and higher strength and conductivity of connector materials. Some commonly used connectors such as tin phosphor bronze and brass can no longer meet the requirements of high-end electronic products. In addition, because beryllium bronze will produce toxic dust when smelting, and it is expensive. Therefore, Cu-Ti alloys with comparable strength to beryllium bronze will receive extensive attention. [0003] Generally speaking, the production process of Cu-Ti ...

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Problems solved by technology

[0004] However, the method of vacuum melting Cu-Ti alloy has the following problems: ① Due to the high degree of vacuum required in the vacuum furnace melting process, the requirements for the sealing of the furnace body are very high, and composition measurement, composition adjustment and grilling cannot be carried out during smelting. Therefore, the requirements for the composition and impurity content of raw materials are very high; ②Vacuum smelting generally cannot adopt the method of rapid cooling, the ingot is prone to grain coarsening, and cracks are easy to appear in the deformation process, which reduces the quality of the finished strip. ③ The discontinuous operation of the vacuum furnace itself makes it only possible to carry out small-scale production, and cannot carry out continuous large-scale production, which limits its industrialization prospects

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