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High-strength-toughness titanium alloy for oceanographic engineering

A tough titanium alloy and marine engineering technology, applied in the field of titanium alloys, can solve the problems of limited use range, inability to meet use requirements, low strength, etc., to reduce process difficulty, improve corrosion resistance and weldability, and improve strength. Effect

Active Publication Date: 2018-01-05
NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

TC4ELI and Ti80 have good thermal stability, corrosion resistance and weldability, but their strength is not high, which cannot meet the requirements of the shipbuilding industry for higher strength titanium alloys; Ti-B19 has high strength, high toughness and good machinability, but As a near-β-type titanium alloy, it needs a long time aging heat treatment after welding to ensure the matching of strength and toughness, which seriously limits its application range in the shipbuilding industry.

Method used

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  • High-strength-toughness titanium alloy for oceanographic engineering
  • High-strength-toughness titanium alloy for oceanographic engineering
  • High-strength-toughness titanium alloy for oceanographic engineering

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Embodiment 1

[0026] The high-strength and tough titanium alloy used in marine engineering in this embodiment is composed of the following mass percentages: Al 3.5%, Sn 3.0%, Zr 6.0%, Mo 1.3%, V 0.5%, Nb 3.0%, and the balance is Ti and unavoidable of impurities.

[0027]The preparation process of the high-strength and tough titanium alloy for marine engineering in this embodiment is as follows: the aluminum-molybdenum master alloy, the aluminum-niobium master alloy, the aluminum-vanadium master alloy, the titanium-tin master alloy, the aluminum bean, the sponge zirconium and the sponge titanium are mixed according to the designed composition. Pressed into an electrode, and then smelted twice in a vacuum consumable electric arc furnace to obtain a titanium alloy ingot; after the surface of the titanium alloy ingot was peeled off and the riser was cut off, the billet was opened twice at 1150°C and 1050°C in sequence Forging, followed by two reforging at 920°C and 900°C respectively, and final...

Embodiment 2

[0030] The high-strength and tough titanium alloy used in marine engineering in this embodiment is composed of the following mass percentages: Al 5.0%, Sn 2.0%, Zr 4.0%, Mo 0.5%, V 2.5%, Nb 2.5%, and the balance is Ti and unavoidable of impurities.

[0031] The preparation process of the high-strength and tough titanium alloy for marine engineering in this embodiment is as follows: the aluminum-molybdenum master alloy, the aluminum-niobium master alloy, the aluminum-vanadium master alloy, the titanium-tin master alloy, the aluminum bean, the sponge zirconium and the sponge titanium are mixed according to the designed composition. Pressed into an electrode, and then smelted twice in a vacuum consumable electric arc furnace to obtain a titanium alloy ingot; after the surface of the titanium alloy ingot was peeled and the riser was cut off, three fires were carried out at 1150°C, 1100°C and 1050°C in sequence. First billet forging, then re-forging at 930°C, and finally rolling at...

Embodiment 3

[0034] The high-strength and tough titanium alloy used in marine engineering in this embodiment is composed of the following mass percentages: Al 6.5%, Sn 0.5%, Zr 3.5%, Mo 1.0%, V 1.0%, Nb 1.5%, and the balance is Ti and unavoidable of impurities.

[0035] The preparation process of the high-strength and tough titanium alloy for marine engineering in this embodiment is as follows: the aluminum-molybdenum master alloy, the aluminum-niobium master alloy, the aluminum-vanadium master alloy, the titanium-tin master alloy, the aluminum bean, the sponge zirconium and the sponge titanium are mixed according to the designed composition. Pressed into an electrode, and then smelted twice in a vacuum consumable electric arc furnace to obtain a titanium alloy ingot; after the surface of the titanium alloy ingot was peeled off and the riser was cut off, the billet was opened twice at 1100°C and 1050°C in sequence Forging, followed by reforging twice at 950°C and 940°C respectively, and fi...

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Abstract

The invention discloses a high-strength-toughness titanium alloy for oceanographic engineering. The high-strength-toughness titanium alloy comprises, by mass percent, 3.5%-6.5% of Al, 0.5%-3.0% of Sn3.0%-6.0% of Zr, 0.5%-2.5% of Mo, 0.5%-2.5% of V, 0.5%-3.0% of Nb and the balance Ti and inevitable impurities. After the high-strength-toughness titanium alloy for oceanographic engineering is subjected to simple annealing or dual annealing treatment, the room temperature tensile strength is larger than 850 MPa, the yield strength is larger than 720 MPa, the impact toughness is larger than 30 J / cm<2>, and good ocean water corrosion resistance and weldability are achieved. Titanium alloy machinability and toughness matching is good, long-time aging heat treatment is not needed after welding, the technology difficulty is lowered, the application range is enlarged, and the application requirements of industrial production and oceanographic engineering are met.

Description

technical field [0001] The invention belongs to the technical field of titanium alloys, in particular to a high-strength and tough titanium alloy for marine engineering. Background technique [0002] Titanium alloy has become an ideal metal structure material for marine engineering due to its characteristics of low density, high specific strength, non-magnetic, sound transmission, resistance to seawater corrosion and marine atmospheric corrosion, shock resistance and good machinability. The use of titanium alloy in marine ships greatly reduces the weight of the ship, increases the load, improves the tolerance of the ship to the marine environment, prolongs the service life of the equipment, and improves the tactical and technical performance of the overall ship. [0003] Based on the requirements of the marine environment, the titanium alloys used in the shipbuilding industry need to have the properties of pressure resistance, seawater corrosion resistance and easy processin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C14/00C22F1/18
Inventor 侯智敏赵永庆赵彬尹雁飞李思兰李磊
Owner NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH