Preparation method of high-ductility titanium alloy material for aviation

A titanium alloy and ductility technology, which is applied in the field of preparation of high ductility titanium alloy materials for aviation, can solve the problem of failure to meet the requirements, strength, elongation and fracture toughness of titanium alloy pre-stretched thick plates for aviation , Corrosion performance and low electrical conductivity, etc., to achieve the effect of excellent comprehensive mechanical properties, good surface quality and good forming performance

Inactive Publication Date: 2019-05-17
李康宁
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Problems solved by technology

[0003] The present invention aims to solve the problem that existing titanium alloy plates have low strength, elongation after fracture, fracture toughness, corrosion performance and electrical conductivity,

Method used

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specific Embodiment approach 1

[0022] Specific Embodiment 1: This embodiment is a method for preparing a high-ductility titanium alloy material for aviation, which is specifically completed according to the following steps:

[0023] 1. Preparation of titanium alloy melt: first, according to the mass fraction of 5.9% to 6.9% Ge, 2.0% to 2.7% Sc, 1.9% to 2.5% Al, 0.08% to 0.15% Zr, 0.001% to 0.12% Si, 0.001% to 0.15% Fe, 0.001% ~ 0.1% Mn, 0.001% ~ 0.04% Cr, 0.001% ~ 0.06% Ti and the balance is titanium Weigh titanium ingot, copper ingot, magnesium ingot, zinc ingot, titanium zirconium alloy ingot, titanium alloy ingot and titanium-boron grain refiner, and then smelted in a melting furnace at a temperature of 720°C to 760°C for 9h to 12h to obtain a titanium alloy melt;

[0024] 2. Preparation of square ingot: under the conditions of casting temperature of 700℃~720℃, casting speed of 30mm / min~50mm / min, cooling water temperature of 10℃~20℃ and cooling water strength of 0.02MPa~0.07MPa Casting the molten titani...

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Abstract

The invention discloses a preparation method of a high-ductility titanium alloy material for aviation, and relates to a method for manufacturing a titanium alloy plate. The preparation method aims tosolve the problem that an existing titanium alloy plate is low in strength, low in fracture elongation, low in fracture toughness, low in corrosion performance and low in electrical conductivity, so that the use requirements of the titanium alloy pre-stretched thick plate for aviation cannot be met. The preparation method comprises the following steps of 1, preparing a titanium alloy melt; 2, preparing a square ingot; 3, annealing; 4, preparing a titanium alloy square ingot; 5, preparing a plate blank; 6, heating; 7, preparing a titanium alloy plate; 8, cutting off; 9, carrying out solid solution treatment and quenching; 10, stretching and straightening; 11, carrying out aging treatment; 12, sawing to obtain the titanium alloy pre-stretched thick plate for aviation. According to the method, the titanium alloy pre-stretched thick plate for aviation can be obtained.

Description

technical field [0001] The invention relates to a preparation method of a high ductility titanium alloy material for aviation. Background technique [0002] At present, my country's aviation products require a special plate, and the longitudinal tensile strength of this titanium alloy plate is required to be not less than 515N / mm 2 , it is stipulated that the non-proportional extension strength is not less than 445N / mm 2 , the elongation after breaking is not less than 9%, and the fracture toughness is not less than 28N / mm 2 .m 1 / 2 ;The transverse tensile strength of the plate is not less than 515N / mm 2 , it is stipulated that the non-proportional extension strength is not less than 445N / mm 2 , the elongation after breaking is not less than 6%, and the fracture toughness is not less than 25N / mm 2 .m 1 / 2 ;The high tensile strength of the plate is not less than 490N / mm 2 , it is stipulated that the non-proportional tensile strength is not less than 420N / mm 2 , the elon...

Claims

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Application Information

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IPC IPC(8): C22C14/00C22C1/03C22F1/18
Inventor 李康宁
Owner 李康宁
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