Weldable titanium alloy with creep resistance, high impact toughness and corrosion resistance and preparation method

Abstract

The invention belongs to the field of titanium alloy materials for deep-sea engineering equipment, and discloses a weldable titanium alloy with creep resistance, high impact toughness and corrosion resistance. The weldable titanium alloy is prepared from the components: 4.0-8.0% of Al, 0.3-4.0% of Mo, 0.5-4.0% of Ta, 0.5-4.0% of Zr, 0.03-0.12% of O and the balance of Ti. A preparation method includes the steps that batching is carried out according to the composition of the titanium alloy, raw materials are melted and subjected to ingot casting, cast ingots are broken down, forged, rolled andheat treated, and titanium alloy plates are obtained. The weldable titanium alloy with the creep resistance, high impact toughness and corrosion resistance has excellent compressive creep performance,plastic toughness, mechanical properties and seawater corrosion resistance, can meet the special service conditions for long-time service under deep-sea high-pressure, can be used for preparing the deep-sea engineering equipment of a deep-sea submersible, a deep-sea mobile work station and a large diving depth submarine and the like, and has a good application prospect and economic benefits in the field of the deep-sea engineering equipment and the like.

Description

technical field [0001] The invention relates to the field of titanium alloy materials used for deep-sea engineering equipment, in particular to a creep-resistant high-impact toughness corrosion-resistant weldable titanium alloy and a preparation method thereof. Background technique [0002] Titanium alloy has excellent properties such as high specific strength, corrosion resistance, and low magnetism. It has obvious advantages in replacing traditional steel materials in deep-sea pressure-resistant structures. It is a deep-sea engineering equipment such as deep-sea submersibles, deep-sea mobile workstations, and deep-sea deep submarines ideal material. With the development of my country's deep-sea engineering technology, the diving depth of pressure-resistant structures is getting deeper and deeper, and the underwater service time is getting longer and longer, which puts forward higher requirements for the comprehensive performance of titanium alloy materials, especially the ...

AI Technical Summary

Problems solved by technology

The above-mentioned titanium alloys of different strength levels have good plasticity and toughness, but the compression creep properties cannot meet the special operating conditions of deep-sea high-pressure long-term service. The long-term effect of external mechanical loads may cause the titanium alloy pressure-resistant structure to creep, which in turn will cause the size and performance of the parts to fail to meet the service requirements, and ultimately affect the safe service of deep-sea engineering equipment

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