Laser manufacturing method for preparing Ni base alloy gradient materials on titanium alloy

A gradient material and manufacturing process technology, applied in metal material coating process, coating, etc., can solve the problems of large difference in thermal expansion coefficient, poor material compatibility, and direct bonding cannot be realized, so as to achieve small residual stress and improve high temperature resistance Characteristics, the effect of small deformation

Active Publication Date: 2015-12-16
AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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AI Technical Summary

Problems solved by technology

[0003] Titanium alloy and Ni-based superalloy have a large difference in thermal expansion coefficient, and the reaction of the two materials will prod

Method used

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Example Embodiment

[0011] The invention prepares the titanium alloy / Ni-based alloy high temperature gradient material, the most critical is the design and optimization of the intermediate transition layer. Two materials are selected to achieve the gradient transition from the titanium alloy to the nickel-based high temperature alloy. The first step is to prepare V on the titanium alloy. -Cr alloy, because Ti, V and Cr are homogeneous phase diagrams, they can be completely mutually soluble, and then a stainless steel alloy is prepared on the V-Cr layer. Fe, V and Cr are homogeneous phase diagrams, and they can also be completely mutually soluble. Control the C content in stainless steel materials below 0.05% to make the stainless steel intermediate layer have better ductility to relieve the residual stress during the preparation of gradient materials, and control the Ni content in stainless steel below 5% to prevent Ni and titanium alloys After the Ti in the inter-diffusion, the Ti-Ni brittle inter...

Example Embodiment

[0018] Example one

[0019] Preparation of GH4169 high temperature resistant gradient material on TC4 titanium alloy plate

[0020] 1. TC4 titanium alloy preparation

[0021] Processing TC4 titanium alloy plate, the size is 50mm×50mm×10mm.

[0022] 2. Implementation process

[0023] (1) GH4169 powder and V-Cr and stainless steel intermediate layer alloy powder are prepared by argon atomization. The volume percentage of V-Cr alloy is 91.3% and 8.7%, respectively. The C content of stainless steel is 0.03% and the Cr content is 13 %, Ni content is 5%, and the powder size is 150 mesh to 325 mesh;

[0024] (2) Clean the surface before preparation, use a wire wheel to polish to remove the oxide film on the surface of the TC4 titanium alloy sheet, visually inspect the metal background color, and then scrub it with acetone;

[0025] (3) First, prepare a 50mm×50mm×0.5mm V-Cr alloy layer on the titanium alloy substrate by laser cladding, and then laser cladding a 50mm×50mm×0.5mm stainless steel al...

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Abstract

The invention belongs to the technical field of laser processing, and relates to a laser manufacturing method for preparing Ni base alloy high-temperature-resistant gradient materials on titanium alloy. The laser manufacturing method is mainly applied to preparation of a titanium alloy high-temperature-resistant layer so as to improve the high temperature resistance property of the titanium alloy. The Ni base with the high temperature resistance property superior to that of the titanium alloy is selected as the high-temperature-resistant layer, and the laser cladding process is used for adding two middle layers namely V-Cr and stainless, so that the Ni base alloy high-temperature-resistant gradient materials are prepared on the titanium alloy. The prepared Ni base alloy high-temperature-resistant layer is good in combination with the titanium alloy base body, and the crack defect on the surface is avoided.

Description

technical field [0001] The invention belongs to the technical field of laser processing, and relates to a laser manufacturing process for preparing Ni-based alloy gradient materials on titanium alloys, which is mainly used for preparing high-temperature-resistant layers on the surface of titanium alloys and improving the high-temperature characteristics of titanium alloys. Background technique [0002] The development of hypersonic aircraft and a new generation of high-performance fighter jets, the high-temperature parts of the aircraft fuselage such as the leading edge of the wing and the leading edge of the vertical tail, and the high-temperature parts of the engine such as the casing outside the combustion chamber put forward higher requirements for high-temperature resistance, but considering Therefore, it is urgent to develop new structural functional materials with light weight, high performance and high temperature resistance to meet the design requirements. At presen...

Claims

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Application Information

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IPC IPC(8): C23C24/10C22C19/05
Inventor 孙兵兵张学军郭绍庆陈冰清李能唐思熠杜博睿
Owner AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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