Powder metallurgy method of Ti-6Al-4V alloy

A ti-6al-4v, powder metallurgy technology, applied in the field of powder metallurgy titanium, can solve the problems of restricting large-scale use, difficult processing, high cost of titanium alloys, etc., and achieve the effects of efficient and stable production, improved density, and excellent performance.

Inactive Publication Date: 2011-07-27
GUANGZHOU RES INST OF NON FERROUS METALS
View PDF4 Cites 15 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the high cost and difficult processing of titanium alloys have always restricted its large-scale use.
How

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
  • Powder metallurgy method of Ti-6Al-4V alloy
  • Powder metallurgy method of Ti-6Al-4V alloy

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0013] Example 1

[0014] Lubricate the inner wall of the mold with an ethanol solution of zinc stearate. The -100 mesh Ti-6Al-4V alloy powder prepared by hydrogenation dehydrogenation method is used as raw material, and the ratio of impact energy to powder loading is 1065J:9.65g. The powder is filled into the mold cavity, and after pre-pressing and exhausting, it is pressed Green body. Place the green body in a high-vacuum sintering furnace and sinter it at 1250°C for 3 hours at a heating rate of 3°C / min, with a vacuum of 1×10 -3 ~1×10 -4 Pa. The powder metallurgy Ti-6Al-4V alloy is obtained after cooling in the furnace. The density measured by the drainage method is 95.1%, the hardness HV is 261, and the compressive strength is 1600MPa.

Example Embodiment

[0015] Example 2

[0016] Lubricate the inner wall of the mold with an ethanol solution of zinc stearate. The -200 mesh Ti-6Al-4V alloy powder prepared by the hydrogenation dehydrogenation method is used as the raw material, and the ratio of the impact energy to the powder load is 913J:8.43g. The powder is filled into the mold cavity, and after pre-pressing and exhausting, it is pressed Green body. Place the green body in a high-vacuum sintering furnace and sinter it at 1250°C for 3 hours at a heating rate of 3°C / min, with a vacuum of 1×10 -3 ~1×10 -4 Pa. After cooling in the furnace, powder metallurgy Ti-6Al-4V alloy is obtained. The density measured by the drainage method is 96.0%, the hardness HV is 302, and the compressive strength is 1890MPa.

Example Embodiment

[0017] Example 3

[0018] Lubricate the inner wall of the mold with an ethanol solution of zinc stearate. The -300 mesh Ti-6Al-4V alloy powder prepared by the hydrogenation dehydrogenation method is used as the raw material, and the ratio of impact energy to powder loading is 304J:7.43g. The powder is filled into the mold cavity, and after pre-pressing and venting Green body. Place the green body in a high-vacuum sintering furnace and sinter it at 1250°C for 3 hours at a heating rate of 3°C / min, with a vacuum of 1×10 -3 ~1×10 -4 Pa. After cooling in the furnace, powder metallurgy Ti-6Al-4V alloy is obtained. The density measured by the drainage method is 95.8%, the hardness HV is 291, and the compressive strength is 1880MPa.

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
Compressive strengthaaaaaaaaaa
Compressive strengthaaaaaaaaaa
Compressive strengthaaaaaaaaaa
Login to view more

Abstract

The invention provides a powder metallurgy method of a Ti-6Al-4V alloy. The method is characterized by comprising the following steps of: lubricating the inner wall of a die with a lubricant, filling Ti-6Al-4V powder between -100 meshes and -300 meshes into a die cavity, prepressing, exhausting, and pressing a green body in the ratio of impact energy to powder filling amount of (304-1,065J):(7.43-9.65)g; and sintering the green body at the temperature rise speed between 3 DEG C per minute and 4DEG C per minute and the vacuum degree between 1*10<-3> Pa and 1*10<-4> Pa and at the temperature between 1,250 DEG C and 1,300 DEG C for 2-3 hours, and cooling to obtain the Ti-6Al-4V alloy. The method has a simple technical process, can be used for preparing a powder metallurgy titanium alloy with high performance by near-net-shape forming and short flow at low cost, and is suitable for industrial production. The titanium alloy prepared by adopting the method has the density of 95.1-97.8 percent, the Vickers hardness (HV) of 261-358 and the compression strength of 1,600-2,100 MPa.

Description

technical field [0001] The invention relates to a powder metallurgy titanium method, in particular to a titanium alloy powder metallurgy method. Background technique [0002] Titanium and titanium alloys have the advantages of low density, high specific strength, strong corrosion resistance, and excellent high-temperature performance. They have broad application prospects in petrochemical, aerospace, bioengineering, and automotive industries. However, the high cost and difficult processing of titanium alloy have always restricted its large-scale use. Therefore, it has always been one of the hot spots of titanium alloy research to seek a simple preparation process, reduce the manufacturing cost, and make it cost-effective to be accepted by the market. Due to the characteristics of near-net shape, powder metallurgy is an ideal process for manufacturing high-performance titanium alloys at low cost. However, the high work-hardening rate of titanium alloys makes it very difficu...

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): B22F3/16
Inventor 闫志巧蔡一湘
Owner GUANGZHOU RES INST OF NON FERROUS METALS
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap