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Manufacturing method for high-niobium TiAl system intermetallic compound and TC4 titanium alloy composite component

An intermetallic compound and composite component technology, which is applied in the field of preparation of high niobium TiAl intermetallic compounds and TC4 titanium alloy composite components, can solve problems such as inability to meet, and achieve efficient and reliable welding, high joint strength coefficient, and dense welding area. Effect

Active Publication Date: 2016-03-09
AEROSPACE RES INST OF MATERIAL & PROCESSING TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the room temperature brittleness of high-niobium TiAl intermetallic compounds, in the process of connecting high-niobium TiAl intermetallic compounds and TC4 titanium alloys using traditional fusion welding methods such as argon arc welding, electron beam welding, and laser welding, the Microcracks are formed in the region; the current diffusion welding technology, including friction welding, superplastic diffusion welding and pressure diffusion welding, can prepare high-niobium TiAl intermetallic compound joints, but these processes require that the welding interface has a simple shape and a good fit, so It cannot meet the needs of some high-niobium TiAl intermetallic compounds / TC4 titanium alloy composite components with complex requirements on the welding interface

Method used

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  • Manufacturing method for high-niobium TiAl system intermetallic compound and TC4 titanium alloy composite component
  • Manufacturing method for high-niobium TiAl system intermetallic compound and TC4 titanium alloy composite component
  • Manufacturing method for high-niobium TiAl system intermetallic compound and TC4 titanium alloy composite component

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Experimental program
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Effect test

Embodiment 1

[0048] A method for manufacturing a high-niobium TiAl intermetallic compound and a TC4 titanium alloy composite component, comprising the following steps:

[0049] (1), according to the requirements of the component, the high niobium TiAl intermetallic compound Ti-45Al-8.5Nb-0.2W-0.3B-0.02Y (at%) (hereinafter referred to as Ti-45Al-8.5Nb-(W, B, Y)) The cast rod is processed into the required shape;

[0050] (2) The middle layer metal Ti-15Ni-15Cu is attached to the surface of Ti-45Al-8.5Nb-(W, B, Y) by electroplating or ion plating; the thickness is 150um.

[0051] (3) Put the processed Ti-45Al-8.5Nb-(W, B, Y) block and TC4 titanium alloy pre-alloyed powder into a 20# low-carbon steel ladle.

[0052] (4) Connect the bag to the vacuum unit and vacuumize at room temperature for 2 hours.

[0053] (5) The vacuum degree in the bag to be wrapped is better than 1.5×10 -3 After Pa, put the jacket into the heating furnace, slowly raise the temperature to 300°C, and keep it warm for ...

Embodiment 2

[0063] A method for manufacturing a high-niobium TiAl intermetallic compound and a TC4 titanium alloy composite component, comprising the following steps:

[0064] (1) According to the requirements of the component, process the high-niobium TiAl intermetallic compound Ti-45Al-8Nb (at%) powder metallurgy rod into the required form;

[0065] (2) Put the treated Ti-45Al-8Nb block and TC4 titanium alloy pre-alloyed powder into the stainless steel 1Cr18Ni9Ti sheathed steel ladle.

[0066] (3) Connect the bag to the vacuum unit and vacuumize at room temperature for 2 hours.

[0067] (4) The vacuum degree in the bag to be wrapped is better than 1×10 -3 After Pa, put the jacket into the heating furnace, slowly raise the temperature to 300°C, and keep it warm for 3h. The vacuum degree in the package is better than 2×10 －3 After Pa, the temperature of the jacket was raised to 780°C, and the holding time was 9h.

[0068] (5) The vacuum degree in the bag to be wrapped is better than 1...

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Abstract

The invention relates to a manufacturing method for a high-niobium TiAl system intermetallic compound and a TC4 titanium alloy composite component. Through the process methods such as the powder-solid joint containing and TC4 titanium alloy powder pretreatment technology and the high-niobium TiAl system intermetallic compound and TC4 titanium alloy hot isostatic pressing diffusion bonding technology, efficient and reliable welding under any complex-shape molded surfaces is carried out on a welding position of the connection part of the high-niobium TiAl system intermetallic compound and a TC4 titanium alloy, and the prepared high-niobium TiAl system intermetallic compound and the prepared TC4 titanium alloy composite component are stable and reliable in welding performance, compact in welding area, free of blind cracks and high in connector strength coefficient.

Description

technical field [0001] The invention relates to a preparation method of a high-niobium TiAl intermetallic compound and a TC4 titanium alloy composite component, belonging to the field of new materials and new techniques. Background technique [0002] With the continuous improvement of flight speed and flight distance, the requirements for lightweight heat-resistant structures of model weapons are getting higher and higher. At present, most of the metal materials used at around 900-1100°C are nickel-based superalloys or alloy steels, with a density of 8-9g / cm 3 Between them, the demand for lightweight structure of the model cannot be met. The density of high-niobium TiAl intermetallic compounds is about 4.0g / cm3, and it has excellent high-temperature performance at about 900-1100°C. It can be used as a substitute material for nickel-based superalloys or alloy steels in this temperature range, so that the component’s The quality is reduced by around 50%. [0003] TC4 titani...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/04C22C14/00
CPCC22C1/0458
Inventor 郎泽保王亮史金靓赵丰李圣刚孙月刚芦振刚王锋
Owner AEROSPACE RES INST OF MATERIAL & PROCESSING TECH
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