Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A method for preparing high-strength titanium alloy rods for additive manufacturing powder making

A technology of additive manufacturing and titanium alloy, which is applied in the direction of manufacturing tools, metal processing equipment, heat treatment equipment, etc., can solve the problems of unstable performance of Ti185 alloy rods, high-speed rotating rods breaking and flying out, unstable performance, etc., and achieve sphericity High, high uniformity, good quality effect

Active Publication Date: 2021-06-25
NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
View PDF10 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The processing of Ti185 rods is as mentioned above because of its high Fe content, using conventional vacuum consumable arc melting and hot pressure processing methods. Ti185 rods currently on the market have not completely solved the segregation of Fe elements. The problem of β spots occurs, and the high-speed rotating rod often breaks and flies out of this defect, causing safety accidents. After high-magnification scanning of the fracture, it is found that there are a large number of spots at the fracture. The surface scanning composition is Fe, which is Fe. segregated phase, the formation of β spots
Although researchers and pressure processing personnel have worked hard to reduce or eliminate β spots, not every batch can avoid β spots, and some of the same batch have β spots and some do not, and the performance of each batch or the same batch is always Very unstable, resulting in unstable performance of Ti185 alloy rods

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
  • A method for preparing high-strength titanium alloy rods for additive manufacturing powder making
  • A method for preparing high-strength titanium alloy rods for additive manufacturing powder making

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] This embodiment includes the following steps:

[0036] Step 1. Mix the titanium alloy raw materials to obtain a mixture; the titanium alloy raw materials are Fe-80V alloy with a particle size of 3 mm to 5 mm, and Ti-32Fe alloy with a particle size of 3 mm to 5 mm, with a particle size of 3 mm to 5 mm Ti-50Al alloy and titanium sponge with a particle size of 10mm to 30mm;

[0037] Step 2. Put the mixed material obtained in step 1 into a mold and press to obtain an electrode block; the pressing pressure is 60 tons, and the electrode block is a cylindrical electrode block with a cross-sectional diameter of 75 mm;

[0038] Step 3. The electrode block obtained in step 2 is subjected to intermediate frequency induction melting to obtain a cylindrical blank; the process of the intermediate frequency induction melting is as follows: the electrode block is placed in an intermediate frequency induction melting furnace, and the vacuum degree in the furnace is kept at 0.7×10 -3 Pa...

Embodiment 2

[0068] This embodiment includes the following steps:

[0069] Step 1. Mix the titanium alloy raw materials to obtain a mixture; the titanium alloy raw materials are Fe-80V alloy with a particle size of 3 mm to 5 mm, and Ti-32Fe alloy with a particle size of 3 mm to 5 mm, with a particle size of 3 mm to 5 mm Ti-50Al alloy and titanium sponge with a particle size of 10mm to 30mm;

[0070] Step 2. Put the mixture obtained in step 1 into a mold and press it to obtain an electrode block; the pressing pressure is 70 tons, and the electrode block is a cylindrical electrode block with a cross-sectional diameter of 80 mm;

[0071] Step 3. The electrode block obtained in step 2 is subjected to intermediate frequency induction melting to obtain a cylindrical blank; the process of the intermediate frequency induction melting is as follows: the electrode block is placed in an intermediate frequency induction melting furnace, and the vacuum degree in the furnace is kept at 0.9×10 -3 Pa, wi...

Embodiment 3

[0078] This embodiment includes the following steps:

[0079] Step 1. Mix the titanium alloy raw materials to obtain a mixture; the titanium alloy raw materials are Fe-80V alloy with a particle size of 3 mm to 5 mm, and Ti-32Fe alloy with a particle size of 3 mm to 5 mm, with a particle size of 3 mm to 5 mm Ti-50Al alloy and titanium sponge with a particle size of 10mm to 30mm;

[0080] Step 2. Put the mixture obtained in step 1 into a mold and press to obtain an electrode block; the pressing pressure is 50 tons, and the electrode block is a cylindrical electrode block with a cross-sectional diameter of 70 mm;

[0081]Step 3. The electrode block obtained in step 2 is subjected to intermediate frequency induction melting to obtain a cylindrical blank; the process of the intermediate frequency induction melting is as follows: the electrode block is placed in an intermediate frequency induction melting furnace, and the vacuum degree in the furnace is kept at 0.8×10 -3 Pa, heated...

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
particle diameteraaaaaaaaaa
particle diameteraaaaaaaaaa
diameteraaaaaaaaaa
Login to View More

Abstract

The invention discloses a method for preparing a high-strength titanium alloy rod for powder-making by additive manufacturing, comprising the following steps: 1. mixing titanium alloy raw materials to obtain a mixture; 2. pressing the mixture to obtain an electrode block; 3. Medium-frequency induction melting of the electrode block to obtain a cylindrical blank; 4. Grinding, chamfering and welding the cylindrical blank to obtain a welded cylindrical blank; 5. Vacuum consumable arc melting of the welded cylindrical blank to obtain a cylindrical ingot; 6. Casting the cylindrical Ingot forging to obtain forged rods; 7. High-temperature crystallization and low-temperature annealing of forged rods to obtain high-strength titanium alloy rods. In the present invention, a unique nano-level hierarchical structure is formed in the microstructure of high-strength titanium alloy rods through medium-frequency induction melting combined with vacuum consumable arc melting and high-temperature crystallization, which ensures that high-strength titanium alloy rods will not have β spots and improves the high-strength titanium alloy rods. The compositional uniformity and tensile strength of the titanium alloy rods ensure that the high-strength titanium alloy rods meet the strength requirements for additive manufacturing powder making.

Description

technical field [0001] The invention belongs to the technical field of metal material processing, and in particular relates to a method for preparing high-strength titanium alloy rods for powder-making by additive manufacturing. Background technique [0002] The weight of titanium metal is only about 45% of that of low-carbon steel. Due to its high specific strength and excellent corrosion resistance, it is widely used in various industrial fields. Titanium is often mixed with some other metals to further increase its strength. As early as 50 years ago, metallographers began to mix titanium with cheaper iron, vanadium, and aluminum metals to further increase the strength. After long-term research and application experiments by scientists, they have obtained good resistance The Ti-1Al-8V-5Fe alloy (hereinafter referred to as Ti185) with corrosion resistance, high specific strength and good fatigue resistance makes it widely used in aerospace, medical equipment and automobile...

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
Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/02C22B9/20C22C14/00C22F1/18C21D9/00B22F9/14B21J5/00
CPCB21J5/002B22F9/14C21D9/0075C22B9/20C22C1/02C22C14/00C22F1/183Y02P10/25
Inventor 李增峰汤慧萍赵少阳谈萍沈垒殷京瓯王利卿葛渊
Owner NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com