Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for pre-treating and matching reversing large deformation refined titanium alloy microstructure

A technology of microstructure and titanium alloy, applied in the field of titanium alloy processing, can solve the problems of limited β grain refinement effect and difficult control of structure uniformity, and achieve the effects of wide applicability, improved structure uniformity and simple operation.

Active Publication Date: 2022-05-13
NORTHWESTERN POLYTECHNICAL UNIV
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Based on this, the present invention provides a method for pretreatment matching commutation and large deformation to refine the microstructure of titanium alloys, so as to solve the technical problems of limited beta grain refinement effect and difficult control of structure uniformity in titanium alloys in the prior art

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for pre-treating and matching reversing large deformation refined titanium alloy microstructure
  • Method for pre-treating and matching reversing large deformation refined titanium alloy microstructure
  • Method for pre-treating and matching reversing large deformation refined titanium alloy microstructure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Step 1, heat treatment to prepare lamellar tissue

[0048] Put the Φ100mm TA15 titanium alloy bar into the vacuum heat treatment furnace, raise the temperature with the furnace to 40°C above the phase transition point and keep it warm for 50min; After the heat preservation is over, the titanium alloy bar is taken out after cooling to room temperature with the furnace, and the TA15 titanium alloy bar whose microstructure is lamellar structure is obtained. The TA15 lamellar structure prepared by heat treatment is as follows: figure 1 As shown in (a), the β average grain size is 500 μm, the grain boundary α thickness is 2 μm, and the α sheet thickness inside the β grain is 1.2 μm.

[0049] Step 2, precision forging pretreatment to adjust lamellar orientation

[0050] Put the obtained titanium alloy bar with lamellar microstructure in a box furnace and heat it to 60°C below the phase transition point, and keep it warm for 90min;

[0051] After the heat preservation is ove...

Embodiment 2

[0058] Step 1, heat treatment to prepare lamellar tissue

[0059] Put the Φ110mm TB6 titanium alloy bar into the vacuum heat treatment furnace, and heat it up to 60°C above the phase transition point with the furnace and keep it warm for 90 minutes; after the heat preservation is over, cool it down to 60°C below the phase change point with the furnace, and keep it warm for 60 minutes; after the heat preservation is over , take out the titanium alloy bar with the furnace cooling to room temperature. The obtained microstructure is TB6 titanium alloy bar with lamellar structure, and the TB6 lamellar structure prepared by heat treatment is as follows: figure 2 As shown in (a), the β average grain size is 275 μm, the grain boundary α thickness is 1.5 μm, and the α layer thickness inside the β grain is 0.7 μm;

[0060] Step 2, precision forging pretreatment to adjust lamellar orientation

[0061] Put the obtained titanium alloy bar with lamellar microstructure in a box furnace an...

Embodiment 3

[0068] Step 1, heat treatment to prepare lamellar tissue

[0069] Put the Φ120mm Ti-55531 titanium alloy bar into the vacuum heat treatment furnace, heat it up to 50°C above the phase transition point with the furnace and keep it warm for 80 minutes; after the heat preservation is over, cool it down to 75°C below the phase change point with the furnace, and keep it warm for 50 minutes; After the end, the titanium alloy bar is taken out after cooling to room temperature with the furnace, and the Ti-55531 titanium alloy bar whose microstructure is lamellar structure is obtained. The Ti-55531 lamellar structure prepared by heat treatment is as follows: image 3 As shown in (a), the β average grain size is 300 μm, the grain boundary α thickness is 1.75 μm, and the α sheet thickness inside the β grain is 0.8 μm;

[0070] Step 2, precision forging pretreatment to adjust lamellar orientation

[0071] Put the obtained titanium alloy bar with lamellar microstructure in a box furnace a...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Thicknessaaaaaaaaaa
Thicknessaaaaaaaaaa
Average grain sizeaaaaaaaaaa
Login to View More

Abstract

The invention relates to a method for pre-treating a matched reversing large deformation refined titanium alloy microstructure, which comprises the following steps of: putting a titanium alloy bar into a vacuum heat treatment furnace, heating to 40-60 DEG C above a phase transformation point along with the furnace, preserving heat, cooling to 60-90 DEG C below the phase transformation point along with the furnace, continuously preserving heat, cooling to room temperature along with the furnace, and taking out the titanium alloy bar, the microstructure of the titanium alloy bar is a lamellar structure; a titanium alloy bar is placed in a box-type furnace to be heated to 50-60 DEG C below the phase transformation point, heat preservation is conducted, after heat preservation is finished, the titanium alloy bar is rapidly transferred to a precision forging machine to be subjected to multiple times of rotary fast forging treatment, air cooling treatment is conducted, and the pretreated titanium alloy bar is obtained; the titanium alloy bar is heated to 40-60 DEG C below the phase transformation point, a sample is compressed after heat preservation, and after deformation is finished, the sample is immediately water-cooled to the room temperature to complete reversing large deformation of the titanium alloy bar. According to the method, refining of the titanium alloy microstructure can be effectively achieved, the microstructure uniformity is improved, operation is easy, and the process stability is high.

Description

technical field [0001] The invention relates to the technical field of titanium alloy processing, in particular to a method for pretreatment matching commutation and large deformation to refine the microstructure of titanium alloy. Background technique [0002] Titanium alloy has become an important structural material in the aerospace industry due to its excellent strength / density ratio, mechanical properties, corrosion resistance and heat resistance. Its mechanical properties mainly depend on key features such as phase volume fraction, microstructure morphology, and β-phase matrix size. It is an important way to obtain good strength and plasticity matching by adjusting the microstructural characteristics and refining structure of titanium alloy through thermal processing. Among them, severe plastic deformation methods such as high pressure torsion (HPT), multidirectional forging (MDF) and equal channel transfer extrusion (ECAP) are widely used in the preparation of fine-g...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C22F1/18C21D8/06B21J5/00
CPCC22F1/183C21D8/06B21J5/002Y02P10/20
Inventor 樊晓光王俐姜雪琦詹梅王志军陈强舒大禹
Owner NORTHWESTERN POLYTECHNICAL UNIV
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com