A kind of preparation method of gradient structure of titanium alloy
A gradient structure, titanium alloy technology, applied in metal processing equipment, metal material coating technology, solid-state diffusion coating, etc., can solve the problems of complex operation of the preparation device, discontinuous structure and performance, etc., to avoid discontinuous, excellent The effect of comprehensive mechanical properties and simple process
Active Publication Date: 2021-10-29
AVIC BEIJING AERONAUTICAL MFG TECH RES INST
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Problems solved by technology
The process is simple, and the titanium alloy gradient structure obtained has more excellent comprehensive mechanical properties, which solves the problems of discontinuous microstructure and performance of the titanium alloy gradient structure prepared by the prior art, and the complicated operation of the preparation device
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[0026] Embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings and examples. The detailed description and accompanying drawings of the following embodiments are used to illustrate the principles of the present invention, but cannot be used to limit the scope of the present invention, that is, the present invention is not limited to the described embodiments, without departing from the spirit of the present invention Equivalent modifications, substitutions, and improvements are covered below.
[0027] It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and embodiments.
[0028] Aiming at the deficiencies in the current preparation process of titanium alloy gradient structure, this patent proposes a...
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Abstract
The invention relates to a preparation method of a titanium alloy gradient structure. The method includes: first, reforging the titanium alloy billet to refine the structure of the titanium alloy, and then performing hydrogen treatment. By controlling the hydrogen filling time, a concentration gradient of hydrogen from the outside to the inside is formed inside the billet, and then at a certain temperature Carry out isothermal heat treatment. During this process, the phase transition temperature of the outer surface of the billet is lowered due to the addition of hydrogen, which is lower than the isothermal heat treatment temperature, so it transforms into a basket structure or a Widmanstatten structure, while the inside of the billet remains The equiaxed fine-grained structure is maintained, and finally the excess hydrogen in the billet is removed by vacuum dehydrogenation treatment. In this method, a titanium alloy gradient structure with a large gradient and gradually changing microstructure is obtained by successively undergoing reforging treatment, surface treatment, hydrogen treatment, isothermal heat treatment and vacuum dehydrogenation treatment on the titanium alloy blank. The process operation of the method The method is simple, the preparation efficiency is high, and the comprehensive performance of the product is high.
Description
technical field [0001] The invention relates to the technical field of titanium alloy structure manufacturing, in particular to a method for preparing a titanium alloy gradient structure. Background technique [0002] Due to their excellent comprehensive mechanical properties, titanium and titanium alloys have been highly valued and widely used in aviation, aerospace, shipbuilding, petroleum, chemical, weapon, electronics, biomedical and other industries. As we all know, titanium alloys have different microstructures, such as equiaxed microstructure, two-state microstructure, three-state microstructure, basket microstructure and Widmanstatten microstructure, etc. Different microstructures have different service properties, and equiaxed microstructures have high strength and high plasticity. And the low cycle fatigue life is long, but the durability, creep strength and fracture toughness are poor; the basket structure has high durability and creep strength, good fracture toug...
Claims
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IPC IPC(8): C23C8/08C23C8/02C22F1/18C22F1/02B21J5/00
CPCB21J5/002C22F1/02C22F1/183C23C8/02C23C8/08
Inventor 王耀奇韩玉杰李红侯红亮
Owner AVIC BEIJING AERONAUTICAL MFG TECH RES INST