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Medium-strength ultrahigh-toughness titanium alloy and preparation method thereof

A tough titanium alloy, ultra-high technology, applied in the field of medium-strength ultra-high-toughness titanium alloy and its preparation, can solve the problems that the plastic toughness of the alloy cannot meet the demand, lack of medium-strength ultra-high-toughness titanium alloy, etc., to achieve good tensile plasticity And the effect of good forgeability, hardenability and low alloy transformation point

Inactive Publication Date: 2019-11-01
725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For example, in my country's marine titanium alloy system, the yield strength is still blank between 600MPa-740MPa, and there is a lack of 700MPa-level medium-strength and ultra-high-toughness titanium alloys; the plasticity and toughness of TA17 and other alloys in the aviation field cannot meet the demand, so it is urgent to develop a new medium-strength Ultra-high toughness titanium alloy, meeting the common requirements of high-pressure gas cylinders, hydraulic air cylinders and other marine high-pressure vessels

Method used

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  • Medium-strength ultrahigh-toughness titanium alloy and preparation method thereof

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Effect test

Embodiment 1

[0021] 3% by weight of aluminum element, 3% of molybdenum element, 1.5% of zirconium element, 3.% of vanadium element, 0.3% of tin element and industrial grade 1 sponge titanium through mixing, pressing electrode rod, vacuum auto The electric arc furnace is smelted three times to form an alloy ingot. via T β +150°C blanking, α+β phase zone forging into forgings, rolling into wide sheets with different thicknesses by hot and cold rolling mills.

Embodiment 2

[0023] 4% aluminum element, 3% molybdenum element, 1% zirconium element, 1% tin element, 1% vanadium element and industrial grade 1 sponge titanium are mixed by weight, pressed electrode rod, vacuum self-consumption The electric arc furnace is smelted three times into an alloy ingot, and after T β +150°C blanking, α+β phase zone forging into forgings, rolling into wide sheets with different thicknesses by hot and cold rolling mills.

Embodiment 3

[0025] 4.5% aluminum element, 3% molybdenum element, 1% zirconium element, 1% tin element, 1% vanadium element and industrial grade 1 sponge titanium are mixed by weight, pressed electrode rod, vacuum self-consumption The electric arc furnace is smelted three times into an alloy ingot, and after T β +150°C blanking, α+β phase zone forging into forgings, rolling into wide sheets with different thicknesses by hot and cold rolling mills.

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Abstract

The invention provides a medium-strength ultrahigh-toughness titanium alloy and a preparation method thereof. The titanium alloy comprises the following raw materials of, in percentage by weight, 3.0%-7.0% of a stable element alpha, 2.0%-6.0% of stable elements beta, 0.5%-4.0% of neutral elements and the balance titanium and inevitable impurities, wherein the chemical component of the stable element alpha is aluminum, the chemical components of the stable elements beta are molybdenum and vanadium, and the chemical components of the neutral elements are zirconium and tin. The preparation methodcomprises the following steps of weighing and proportioning the materials according to the weight percentage of the raw materials, uniformly mixing the materials, and then pressing the mixture into an electrode block; smelting the electrode block, removing skin of an ingot in a turning mode, and removing a shrinkage cavity of the ingot; then, heating the ingot, carrying out cogging on a pressurizing device, forging the ingot to form a forge piece, and machining the forge piece into a slab; and finally, rolling the slab into wide plates with different thicknesses by adopting a cold and hot rolling mill. The alloy has good pressure processing performance, good tensile plasticity and forgeability, the used material has very high toughness, and meanwhile, an alloy phase transformation point is low, the hardenability of the alloy is good, and the stability of the structure at a high temperature is good.

Description

technical field [0001] The invention belongs to the field of titanium alloy wires for ships and ocean engineering, and in particular relates to a medium-strength, ultra-high-toughness titanium alloy and a preparation method thereof. Background technique [0002] As an alloy for ships and marine equipment, there are special requirements for the material itself. It must not only have sufficient strength, but also take into account appropriate toughness. Because of the special service environment of titanium alloys for marine engineering, based on the consideration of safety and reliability, the strength As an important technical index of titanium alloy performance, the matching with toughness has been paid more and more attention. In order to meet the safety requirements of "only leaking but not exploding" for high-pressure vessels, its safety design puts forward extremely high requirements for the matching of strength, plasticity and toughness of titanium alloys. It is requir...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C14/00C22C1/03C22F1/18
CPCC22C1/03C22C14/00C22F1/183
Inventor 吴宇坤晏阳阳蒋鹏
Owner 725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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