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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 produce a variety of intermetallic compounds, resulting in extremely poor compatibility between the two materials, and direct combination cannot be realized

Method used

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specific Embodiment approach

[0012] The technical solution of the present invention will be described in further detail below in conjunction with examples:

[0013] The steps of this method are:

[0014] (1) Ni-based alloy and intermediate transition layer powder material are prepared by argon atomization powder making method, the intermediate layer material is two kinds of V-Cr alloy and stainless steel alloy respectively, and the Cr content volume fraction range of V-Cr alloy is 8.0%. ~10.0%, the C content of stainless steel is controlled below 0.03%, the Cr content is 10%~15%, and the Ni content is controlled below 5%. The particle size of the powder is 150 mesh to 325 mesh;

[0015] (2) Clean the surface before preparation, use a steel wire wheel to polish and remove the oxide film on the titanium alloy surface, visually check to expose the metal background color, and then scrub it with acetone;

[0016] (3) First, a 0.3-0.5 mm thick V-Cr alloy layer is prepared on the titanium alloy substrate by la...

example 1

[0019] Preparation of GH4169 High Temperature 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 interlayer alloy powder were prepared by argon atomization powder making method, the volume percentages of V-Cr alloy were 91.3% and 8.7% respectively, the C content of stainless steel was 0.03%, and the Cr content was 13% %, the Ni content is 5%, and the powder particle size is 150 mesh to 325 mesh;

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

[0025] (3) Firstly, a 50mm×50mm×0.5mm V-Cr alloy layer was prepared on the titanium alloy substrate by laser cladding, and then a 50mm×50mm×0.5mm s...

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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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