Manufacturing method for titanium alloy and nickel-base superalloy laser additive connection

A nickel-based superalloy, laser additive technology, applied in laser welding equipment, manufacturing tools, additive processing, etc., can solve problems such as limiting alloy connection performance

Active Publication Date: 2019-04-05
SHENYANG POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the direct connection between titanium alloy and nickel-based superalloy, intermetallic compounds will be generated, which limits the improvement of the connection performance of the two alloys

Method used

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  • Manufacturing method for titanium alloy and nickel-base superalloy laser additive connection
  • Manufacturing method for titanium alloy and nickel-base superalloy laser additive connection
  • Manufacturing method for titanium alloy and nickel-base superalloy laser additive connection

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Laser additive bonding test of TA15 titanium alloy and GH4169 superalloy

[0034] 1. Preparation of parts to be connected

[0035] Make a 45-degree bevel on the workpieces to be connected of titanium alloy and high-temperature alloy by machining, and the size is 60mmx30mmx10mm. Grind the groove and the surrounding area with a rotary file tool, and clean it with alcohol and acetone after grinding.

[0036] 2. Implementation process

[0037] The GH4169, Nb and Cu powders are prepared by vaporized atomization, and the powder meshes are 100-200 meshes.

[0038] Form 1mm thick Nb on the groove surface of TA15 titanium alloy by laser additive manufacturing method, the main process parameters of laser forming are laser power 2400W, scanning speed 6mm / s and powder feeding speed 80g / min; then form 1mm thick on Nb Cu, the main process parameters of laser forming are laser power 1600W, scanning speed 8mm / s and powder feeding speed 70g / min.

[0039] Install the TA15 titanium al...

Embodiment 2

[0043] (1) Prepare a 45-degree groove on the workpieces to be connected of titanium alloy and high-temperature alloy by machining, and grind the groove and the surrounding 7mm area with a rotary file tool. After grinding, first clean it with absolute ethanol, and then Clean with anhydrous acetone to make the groove surface free of oil and other impurities;

[0044](2), forming 0.5mm thick Nb on the surface of the titanium alloy groove by laser additive manufacturing, and then forming 0.5mm thick Cu on the Nb, using Nb / Cu as a connecting transition layer; both the Nb layer and the Cu layer Nb and Cu powders are used and prepared by argon atomization, and the particle size of Nb and Cu powders is 100 mesh.

[0045] (3) Install the workpieces to be connected of titanium alloy and nickel-based superalloy on the laser additive connection fixture, and use nickel-based superalloy powder for laser additive connection; install the workpieces to be connected of titanium alloy and nickel...

Embodiment 3

[0050] (1) Prepare a 45-degree groove on the workpieces to be connected of titanium alloy and high-temperature alloy by machining, and grind the groove and the surrounding 15mm area with a rotary file tool. After grinding, clean it with absolute ethanol, and then Clean with anhydrous acetone to make the groove surface free of oil and other impurities;

[0051] (2) Form 0.7mm thick Nb on the surface of titanium alloy groove by laser additive manufacturing method, then form 0.7mm thick Cu on Nb, and use Nb / Cu as the connecting transition layer; Nb layer and Cu layer are both Nb and Cu powders are used and prepared by argon atomization, and the particle size of Nb and Cu powders is 200 mesh.

[0052] (3) Install the workpieces to be connected of titanium alloy and nickel-based superalloy on the laser additive connection fixture, and use nickel-based superalloy powder for laser additive connection; install the workpieces to be connected of titanium alloy and nickel-based superallo...

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Abstract

The invention relates to a manufacturing method for titanium alloy and nickel-base superalloy laser additive connection. The method comprises the following steps of (1) using to-be-connected workpieces of a titanium alloy and a superalloy for preparing a 45-degree groove through a machining manner, cleaning the groove, and then cleaning through anhydrous acetone, so that no oil stains and other impurities exist on the surface of the groove; (2) forming Nb with the thickness being 0.5 to 1mm on the surface of the titanium alloy groove through a laser additive manufacturing method, then formingCu with the thickness being 0.5 to 1mm on the Nb, and using Nb / Cu as a connection transition layer; (3) installing the to-be-connected workpieces of the titanium alloy and the nickel-base superalloy onto a laser additive connection tool fixture, and using nickel-base superalloy powder for carrying out laser additive connection; and (4) adopting a vacuum heat treatment furnace for carrying out overall stress relief annealing treatment. During the laser additive connection process, through the Nb / Cu transition layer, an intermetallic compound can be effectively prevented from being produced between the titanium alloy and the nickel-base superalloy, the generation of cracks is avoided, and the effective connection of the titanium alloy and the nickel-base superalloy is realized.

Description

technical field [0001] The invention belongs to the technical field of laser additive manufacturing, and relates to a laser additive connection process for titanium alloys and nickel-based superalloys, which is mainly used for preparing gradient materials of titanium alloys and nickel-based superalloys, replacing nickel-based superalloys with titanium alloys The weight of small superalloy components improves the thrust-to-weight ratio of the aircraft. Background technique [0002] With the advancement of science and technology and the rapid development of the aerospace industry, modern structural materials are developing in the direction of both high "strength / weight ratio" and "high fracture toughness". With the continuous increase of the flight distance of aerospace vehicles, it has become an important goal for the design and manufacture of aerospace engines to continuously improve the thrust-to-weight ratio of engines. Titanium alloy is a lightweight structural material ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K26/342B23K26/60B23K26/70B33Y10/00B23K103/18
CPCB33Y10/00B23K26/342B23K26/60B23K26/702
Inventor 尚纯徐国建王辰阳尤俊华苏允海郑文涛胡方于宝义
Owner SHENYANG POLYTECHNIC UNIV
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