A kind of nb‑si‑ti‑mo‑b alloy plate and preparation method thereof

An alloy sheet, nb-si-ti-mo-b technology, applied in the field of Nb-Si-Ti-Mo-B alloy sheet and its preparation, can solve the problem of reducing the high-temperature tensile strength of alloy materials, difficult to process and form, and fracture Low toughness and other problems, to achieve the effect of improving room temperature plastic toughness, reducing density, and improving room temperature plasticity

Active Publication Date: 2018-01-30
NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This kind of structure makes the room temperature fracture toughness of Nb-Si alloy very low, even at high temperature, it has no plasticity, and it is difficult to process and form; it also reduces the high temperature tensile strength of the alloy material.

Method used

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  • A kind of nb‑si‑ti‑mo‑b alloy plate and preparation method thereof
  • A kind of nb‑si‑ti‑mo‑b alloy plate and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The Nb-Si-Ti-Mo-B alloy sheet of this embodiment is composed of the following atomic percentages: Si 13%, Ti 10%, Mo 8%, B 1.5%, and the balance is Nb and unavoidable impurities.

[0029] The preparation method of the Nb-Si-Ti-Mo-B alloy sheet of this embodiment includes the following steps:

[0030] Step 1. Place Si powder, Ti powder, Mo powder, B powder and Nb powder in a ball mill, using absolute ethanol as a dispersant, and wet ball milling at a speed of 200 rpm and a ball-to-material mass ratio of 6:1 15h, after ball milling, drying under vacuum conditions to obtain mixed powder; the volume of the absolute ethanol is 4 times the sum of the mass of Si powder, Ti powder, Mo powder, B powder and Nb powder, and the unit of volume is mL , The unit of mass is g, the mass purity of the Si powder, Ti powder, Mo powder, B powder and Nb powder is not less than 99%, the particle size of the Si powder is not more than 10 μm, and the particle size of the Ti powder Not more than 20 ...

Embodiment 2

[0042] The Nb-Si-Ti-Mo-B alloy sheet of this embodiment is composed of the following atomic percentages: Si 10%, Ti 8%, Mo 6%, B 1%, and the balance is Nb and unavoidable impurities.

[0043] The preparation method of the Nb-Si-Ti-Mo-B alloy sheet of this embodiment includes the following steps:

[0044] Step 1. Put Si powder, Ti powder, Mo powder, B powder and Nb powder in a ball mill, use absolute ethanol as a dispersant, wet ball mill at a speed of 100 rpm and a ball-to-material mass ratio of 4:1 10h, after ball milling, drying under vacuum conditions to obtain mixed powder; the volume of the absolute ethanol is 3 times the sum of the mass of Si powder, Ti powder, Mo powder, B powder and Nb powder, and the unit of volume is mL , The unit of mass is g, the mass purity of the Si powder, Ti powder, Mo powder, B powder and Nb powder is not less than 99%, the particle size of the Si powder is not more than 10 μm, and the particle size of the Ti powder Not more than 20 μm, the partic...

Embodiment 3

[0051] The Nb-Si-Ti-Mo-B alloy sheet of this embodiment is composed of the following atomic percentages: Si 16%, Ti 12%, Mo 10%, B 2%, and the balance is Nb and unavoidable impurities.

[0052] The preparation method of the Nb-Si-Ti-Mo-B alloy sheet of this embodiment includes the following steps:

[0053] Step 1. Place Si powder, Ti powder, Mo powder, B powder and Nb powder in a ball mill, using anhydrous ethanol as a dispersant, and wet ball milling at a speed of 100 rpm and a ball-to-material mass ratio of 8:1 20h, after ball milling, drying under vacuum conditions to obtain mixed powder; the volume of the absolute ethanol is 5 times the sum of the mass of Si powder, Ti powder, Mo powder, B powder and Nb powder, and the unit of volume is mL , The unit of mass is g, the mass purity of the Si powder, Ti powder, Mo powder, B powder and Nb powder is not less than 99%, the particle size of the Si powder is not more than 10 μm, and the particle size of the Ti powder Not more than 20 ...

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Abstract

The invention provides a Nb-Si-Ti-Mo-B alloy plate. The Nb-Si-Ti-Mo-B alloy plate is composed of, by atomic percent, 8-18% of Si, 7-13% of Ti, 4-12% of Mo, 0.5-2.5% of B, and the balance Nb and unavoidable impurities. The invention further provides a method for preparing the plate. The method includes the following steps that firstly, Nb powder, Si powder, Ti powder, Mo powder and B powder are evenly mixed by means of a wet ball milling method and dried in a vacuum mode, so that a powder mixture is obtained; secondly, the powder mixture is subjected to vacuum sintering, and a sintered body is obtained; thirdly, vacuum self-consuming arc melting is conducted, and a cast ingot is obtained; fourthly, hot extrusion is conducted, and a rod blank is obtained; and fifthly, hot rolling is conducted, and the Nb-Si-Ti-Mo-B alloy plate is obtained. The Nb-Si-Ti-Mo-B alloy plate has high room-temperature and high-temperature strength, excellent high-temperature plasticity and good room-temperature plasticity.

Description

Technical field [0001] The invention belongs to the technical field of alloy material preparation, and specifically relates to a Nb-Si-Ti-Mo-B alloy plate and a preparation method thereof. Background technique [0002] In the future, the service temperature of aerospace engines will further increase, and the service environment will be more demanding. Refractory metal solid solution alloys cannot meet the needs of the next generation of high-performance advanced engines, which promotes the rapid development of refractory metal matrix composites. At the same time, with the rapid development and upgrading of science and technology, the rapid social development and the increasing improvement of people’s living standards, people’s demand for refractory alloys and their composite materials is increasing. The performance puts forward higher requirements. Among all refractory metals, niobium (Nb) is most likely to be used in aero engines. Niobium has good ductility and processing and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C27/02C22C1/02C22F1/18
CPCC22C1/02C22C27/02C22F1/18
Inventor 喻吉良刘辉王峰夏明星蔡小梅白润
Owner NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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