High-strength and high-toughness titanium alloy with good additive manufacturing forming performance and used at high temperature of 600 DEG C

A technology of additive manufacturing and tough titanium alloy, applied in the direction of additive processing, etc., can solve the problems of poor forming performance and low high temperature strength and toughness of additive manufacturing, and achieve poor forming performance and low high temperature damage tolerance of additive manufacturing , the effect of good damage tolerance capability

Active Publication Date: 2021-06-29
DALIAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention aims to solve the technical problems of low high-temperature strength and toughness of existing high-temperature titanium alloy materials and poor formability of additive manufacturing, and designs and develops a high-strength and tough titanium alloy for high temperature 600°C with good additive manufacturing formability

Method used

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  • High-strength and high-toughness titanium alloy with good additive manufacturing forming performance and used at high temperature of 600 DEG C
  • High-strength and high-toughness titanium alloy with good additive manufacturing forming performance and used at high temperature of 600 DEG C
  • High-strength and high-toughness titanium alloy with good additive manufacturing forming performance and used at high temperature of 600 DEG C

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Effect test

Embodiment 1

[0023] Example 1: The mass percent ratio of Al / (V+Mo+Nb+Zr) is 6.8:12

[0024] Example 1 is a high-strength and tough titanium alloy for high temperature 600°C with good additive manufacturing forming properties, which is specifically carried out according to the following steps:

[0025] 1. Composition design and preparation of high-strength and tough titanium alloys for high temperature 600°C: design model 12[Al-Ti based on cluster alloy composition 12 ] (AlTi 2 )+5[Al-Ti 12 Zr 2 ] (AlV 1.2 Mo 0.6 Nb 0.2 ), and the atomic percentage of the titanium alloy composition is obtained as Ti 80.9 al 12.1 V 2.1 Mo 1.1 Nb 0.3 Zr 3.5 (at.%), change the element from atomic percentage to mass percentage Ti 81.2 al 6.8 V 2.3 Mo 2.2 Nb 0.7 Zr 6.8 (wt.%) for component distribution, then ball milling at room temperature for powder mixing, then heating in a vacuum heat treatment furnace to a temperature of 120°C for drying treatment for 8 hours, and cooling to room temperatur...

Embodiment 2

[0028] Example 2: The mass percent ratio of Al / (V+Mo+Nb+Zr) is 6.9:8.7

[0029] Example 2 is a high-strength and tough titanium alloy for high temperature 600°C with good additive manufacturing forming properties, which is specifically carried out according to the following steps:

[0030] 1. Composition design and preparation of high-strength and tough titanium alloys for high temperature 600°C: design model 12[Al-Ti based on cluster alloy composition 12 ] (AlTi 2 )+5[Al-Ti 13 Zr 1 ] (AlV 1.2 Mo 0.6 Nb 0.2 ), and the atomic percentage of the titanium alloy composition is obtained as Ti 82.6 al 12.0 V 2.1 Mo 1.1 Nb 0.4 Zr 1.8 (at.%), change the element from atomic percentage to mass percentage Ti 84.4 al 6.9 V 2.3 Mo 2.2 Nb 0.7 Zr 3.5 (wt.%) for component distribution, then ball milling at room temperature for powder mixing, then heating in a vacuum heat treatment furnace to a temperature of 120°C for drying treatment for 8 hours, and cooling to room temperatu...

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Abstract

The invention discloses a high-strength and high-toughness titanium alloy with good additive manufacturing forming performance and used at the high temperature of 600 DEG C, and belongs to the technical field of metal additive manufacturing. The titanium alloy comprises the following components in percentage by mass: 6.2-7.5% of Al, 1.2-4.5% of V, 1.2-4.5% of Mo, 0.5-2.0% of Nb, 3.2-9.6% of Zr, less than or equal to 0.02% of Mn, less than or equal to 0.02% of C, less than or equal to 0.01% of Ni, less than or equal to 0.20% of Si, less than or equal to 0.20% of Sn, less than or equal to 0.04% of Cr, less than or equal to 0.02% of O, less than or equal to 0.01% of P, less than or equal to 0.01% of S, less than or equal to 0.006% of N and the balance of Ti, and the mass percentage ratio of Al to (V + Mo + Nb + Zr) is 5:(4.2-13). Through alloy component design, alpha phase refining, strength improving, beta phase content optimizing, plasticity improving and melt thermal stability enhancing are achieved, the toughness of the alloy at the high temperature of 600 DEG C is improved to the maximum degree, and the alloy can be used for additive manufacturing forming.

Description

technical field [0001] The invention relates to a high-strength and tough titanium alloy for high temperature 600°C with good forming performance of additive manufacturing, belonging to the technical field of metal additive manufacturing. Background technique [0002] Laser additive manufacturing of lightweight metal materials is a key material in the aviation industry. Due to the complex and changeable shapes of aviation parts, high material performance requirements, and high processing difficulty, the use of large-scale overall structures is an urgent need for design, but related laser processing alloys The composition system is extremely scarce. In addition, metal structural parts in the aviation industry are subject to high-temperature alternating loads and need to have good high-temperature strength and toughness. At present, the most commonly used industrial high-temperature titanium alloys are Ti60, IMI834, Ti1100, etc., which have the advantages of high temperature ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C14/00B33Y70/00
CPCC22C14/00B33Y70/00
Inventor 朱智浩董闯刘田雨王清
Owner DALIAN UNIV OF TECH
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