Mo-Si-B-Hf-Al alloy bar and preparation method thereof

A mo-si-b-hf-al, alloy bar technology, applied in the field of Mo-Si-B-Hf-Al alloy bar and its preparation, can solve the problem of reducing the bonding strength of the grain boundary of the material, the material having holes, It is easy to produce micro-cracks and other problems, and achieve the effect of improving room temperature toughness and high temperature strength, oxidation resistance room temperature fracture toughness, and good room temperature fracture toughness

Active Publication Date: 2016-06-29
NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
View PDF6 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, a common feature of these Mo-Si-B alloy materials is that they are very brittle at room temperature, and there are defects such as holes and microcracks in the material, which reduce the mechanical properties, oxidation resistance and reliability of the material, resulting in these Mo-Si -B series alloy materials are difficult to be applied in engineering
This is due to the high content of impurity elements and oxygen in Mo-Si-B alloys prepared by traditional powder metallurgy, impurity elements reduce the high-temperature mechanical properties, and brittle oxygen elements are enriched at the grain boundaries, making the material brittle
In addition, the Mo-Si-B series alloy prepared by p

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
  • Mo-Si-B-Hf-Al alloy bar and preparation method thereof
  • Mo-Si-B-Hf-Al alloy bar and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The Mo-Si-B-Hf-Al alloy bar of this embodiment is characterized in that it is made of the following atomic percentage raw materials: Si14%, B16%, Hf10%, Al10%, and the balance is Mo and unavoidable impurities .

[0028] The preparation method of the present embodiment Mo-Si-B-Hf-Al alloy bar comprises the following steps:

[0029] Step 1. Put silicon powder, boron powder, hafnium powder, aluminum powder and molybdenum powder in a ball mill, use absolute ethanol as a dispersant, and wet ball mill at a speed of 350 rpm and a mass ratio of ball to material of 9:1. After 20 hours, dry under vacuum conditions after ball milling to obtain mixed powder; the volume of the absolute ethanol is 1.5 times the sum of the mass of silicon powder, boron powder, hafnium powder, aluminum powder and molybdenum powder, wherein the unit of volume is mL , the unit of mass is g, the mass purity of the silicon powder, boron powder, hafnium powder, aluminum powder and molybdenum powder is not ...

Embodiment 2

[0040] The Mo-Si-B-Hf-Al alloy bar of this embodiment is characterized in that it is made of the following atomic percentage raw materials: Si8%, B9%, Hf13%, Al12%, and the balance is Mo and unavoidable impurities .

[0041] The preparation method of the present embodiment Mo-Si-B-Hf-Al alloy bar comprises the following steps:

[0042] Step 1. Put silicon powder, boron powder, hafnium powder, aluminum powder and molybdenum powder in a ball mill, use absolute ethanol as a dispersant, and wet ball mill at a speed of 300 rpm and a mass ratio of ball to material of 6:1. 10h, after ball milling, dry under vacuum conditions to obtain mixed powder; the volume of the absolute ethanol is twice the sum of the mass of silicon powder, boron powder, hafnium powder, aluminum powder and molybdenum powder, wherein the unit of volume is mL , the unit of mass is g, the mass purity of the silicon powder, boron powder, hafnium powder, aluminum powder and molybdenum powder is not less than 99%, t...

Embodiment 3

[0049] The Mo-Si-B-Hf-Al alloy bar of this embodiment is characterized in that it is made of the following atomic percentages of raw materials: 16%, B17%, Hf7%, Al8%, and the balance is Mo and unavoidable impurities .

[0050] The preparation method of the present embodiment Mo-Si-B-Hf-Al alloy bar comprises the following steps:

[0051] Step 1. Put silicon powder, boron powder, hafnium powder, aluminum powder and molybdenum powder in a ball mill, use absolute ethanol as a dispersant, and wet ball mill at a speed of 400 rpm and a mass ratio of ball to material of 12:1. 30h, dry under vacuum condition after ball milling, obtain mixed powder; The volume of described dehydrated alcohol is 3 times of the sum of the mass of silicon powder, boron powder, hafnium powder, aluminum powder and molybdenum powder, wherein the unit of volume is mL, the unit of mass is g, the mass purity of the silicon powder, boron powder, hafnium powder, aluminum powder and molybdenum powder is not less ...

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 sizeaaaaaaaaaa
Particle sizeaaaaaaaaaa
Particle sizeaaaaaaaaaa
Login to view more

Abstract

The invention provides a Mo-Si-B-Hf-Al alloy bar. The Mo-Si-B-Hf-Al alloy bar is composed of the following ingredients in atomic percent: 6-18% of Si, 7-19% of B, 5-15% of Hf, 6-14% of Al and the balance Mo and inevitable impurities. The invention further provides a method for preparing the alloy bar. The method comprises the following steps: 1. uniformly mixing silicon powder, boron powder, hafnium powder, aluminium powder and molybdenum powder by means of wet ball-milling, carrying out vacuum drying, and then obtaining a mixed powder; 2. sintering to obtain a sintered body; 3. carrying out vacuum self-consuming arc melting to obtain a cast ingot; 4. carrying out hot extrusion to obtain a semi-finished bar billet; and 5. carrying out hot extrusion to obtain the Mo-Si-B-Hf-Al alloy bar. The Mo-Si-B-Hf-Al alloy bar provided by the invention has the characteristics of being low in oxygen content, high in strength, resistant to oxidation, high in room-temperature fracture toughness, and the like, and can be applied to a high-temperature oxidation atmosphere.

Description

technical field [0001] The invention belongs to the technical field of alloy material preparation, and in particular relates to a Mo-Si-B-Hf-Al alloy rod and a preparation method thereof. Background technique [0002] The higher the working temperature of the turbine blade material of the aero-engine, the better the performance of the engine and the higher the efficiency. The thrust-to-weight ratio of the aero-engine has a great relationship with the working temperature of the turbine blade material. At present, nickel-based superalloys cannot meet the requirements of advanced aero-engines, and the next generation of high-temperature structural materials must be developed. Mo-Si-B alloys are formed from in situ self-generated Mo 5 SiB 2 、Mo 3 Composed of Si intermetallic compound phase and molybdenum solid solution (Moss) phase, it has the characteristics of high melting point, high temperature strength and oxidation resistance, and has broad application prospects in the ...

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): C22C27/04C22C30/00C22C1/05C22C1/03B21C23/08
CPCB21C23/08C22C1/03C22C1/05C22C27/04C22C30/00
Inventor 喻吉良郑欣张如李来平蔡小梅王峰裴雅
Owner NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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