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WSTi1400 ultrahigh-strength titanium alloy and preparing method thereof

An ultra-high-strength, titanium alloy technology, applied in the field of titanium alloy processing, can solve the problems of low alloy phase transition point, difficult control of deformation uniformity in forging process, and large deformation resistance

Inactive Publication Date: 2020-01-24
西部超导材料科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to obtain a comprehensive match of strength, toughness and fatigue properties, a large amount of molybdenum, chromium, vanadium, aluminum, iron, and niobium are added to the WSTi1400 alloy. Metallurgical defects such as niobium-rich non-melting blocks, and the addition of a large number of β-stable elements, the alloy phase transition point is low, the deformation resistance is large, and the deformation uniformity of the forging process is difficult to control

Method used

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  • WSTi1400 ultrahigh-strength titanium alloy and preparing method thereof
  • WSTi1400 ultrahigh-strength titanium alloy and preparing method thereof
  • WSTi1400 ultrahigh-strength titanium alloy and preparing method thereof

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Embodiment 1

[0041] The invention provides a WSTi1400 ultra-high-strength titanium alloy, which is composed of the following elements according to the weight percentage: Cr: 5.6%-7.5%, Mo: 4.8%-6.5%, V: 4.6%-5.3%, Al: 3.8%- 4.5%, Nb: 0.8%~1.3%, Fe≤0.8%, O≤0.30%, the balance is Ti and unavoidable impurities, the total amount of impurity elements is not more than 0.20%, and the sum of the weight percentages of the above components is 100% .

[0042] Further, Cr, Mo, V, Al, Nb, and Fe elements are derived from binary and multi-element master alloys, and the multi-element master alloy is AlMoVCr quaternary alloy, Nb is added in the form of Nb47Ti, Mo is added in the form of AlMo alloy, and V is added in the form of AlV It is added in the form of alloy, and Ti adopts 0.83-12.7mm particle sponge titanium.

[0043] The preparation method of the above-mentioned WSTi1400 ultra-high-strength titanium alloy specifically includes the following steps:

[0044] Step 1), prepare electrode:

[0045] Ac...

Embodiment 2

[0058] The present invention also provides a preparation method of WSTi1400 ultra-high-strength titanium alloy, which specifically includes the following steps:

[0059] Step 1), according to the weight percentage of each element is: Cr5.8%, Mo5.5%, V5.0%, Al4.0%, Nb1.0%, Fe0.5%, O≤0.30%, the balance is Ti and unavoidable impurities, the total amount of impurity elements does not exceed 0.20%, and the sum of the weight percentages of the above components is 100%, respectively weigh AlMoVCr quaternary alloy, Nb47Ti, AlMo, AlV and small particle sponges with a particle size of 0.83-12.7mm Titanium is mixed with a single electrode, and the mixed raw materials are poured into the cavity of a large hydraulic press and pressed into a dense electrode block with a pressing force of 20MPa and a holding time of 4s;

[0060] Step 2), use a clamp to clamp the electrode block, and use a non-tungsten argon shielded plasma box to weld the pressed electrode block into a self-consumable electr...

Embodiment 3

[0066] The present invention also provides a preparation method of WSTi1400 ultra-high strength titanium alloy, comprising:

[0067] Step 1), according to the weight percentage of each element: Cr6.5%, Mo5.0%, V5.0%, Al4.2%, Nb1.0%, Fe0.2%, O≤0.30%, the balance is Ti and unavoidable impurities, the total amount of impurity elements does not exceed 0.20%, and the sum of the weight percentages of the above components is 100%, respectively weigh AlMoVCr quaternary alloy, Nb47Ti, AlMo, AlV and small particle sponges with a particle size of 0.83-12.7mm Titanium is mixed with a single electrode, and the mixed raw materials are poured into the cavity of a large hydraulic press and pressed into a dense electrode block with a pressing force of 20MPa and a holding time of 4s;

[0068] Step 2), clamp the electrode block obtained in step 1) with a clamp, and use a non-tungsten argon shielded plasma box to weld the pressed electrode block into a self-consumable electrode. The welding curre...

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Abstract

The invention belongs to the technical field of titanium alloy processing, and particularly relates to WSTi1400 ultrahigh-strength titanium alloy. The WSTi1400 ultrahigh-strength titanium alloy is prepared from, by weight percentage, 5.0-9.0% of Cr, 4.0-8.0% of Mo, 3.0-7.0% of V, 2.0-6.0% of Al, 0.0-4.0% of Nb, 0-2.00% of Fe, 0-0.30% of O and the balance Ti and inevitable impurities. The inventionfurther discloses a preparing method of the titanium alloy. The components of the titanium alloy prepared by means of the method are high in transverse and longitudinal homogeneity, breakthrough is made in the industrial tonnage large-specification ingot casting chemical component homogeneity control technology, burning loss of the aluminum element in the smelting process is reduced, metallurgical defects caused when high-melting-point molybdenum, vanadium and niobium elements form infusible blocks are overcome, and a titanium alloy rod which has the strength larger than 1,400 Mpa and the breaking tenacity larger than 55 MPa.m <0.5> is obtained.

Description

technical field [0001] The invention belongs to the technical field of titanium alloy processing, and in particular relates to a WSTi1400 ultra-high-strength titanium alloy and a preparation method thereof. Background technique [0002] With the development of aerospace technology, the development of domestic high-performance aviation equipment urgently needs an ultra-high-strength titanium alloy suitable for large-scale aerospace structural parts. The strength of titanium alloy is required to be greater than 1400MPa, and the fracture toughness is greater than 55MPa m 0.5 . At present, there are no titanium alloys that can meet the requirements at home and abroad. The high-strength titanium alloys for aerospace structural parts that have been in service and mass-produced include Ti55531, Ti5553, TC18 and TB6. The design strength is not greater than 1300Mpa, and the fracture toughness is about 40MPa m 0.5 . [0003] WSTi1400 is a 1400MPa ultra-high-strength near-β-type tita...

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 崔林林李少强王凯旋雷锦文孙峰樊彦杰张丰收付杰杜予晅李洁瑶杜小联史蒲英刘向宏
Owner 西部超导材料科技股份有限公司
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