Quickly-solidified Nb-Si-base multi-alloy containing SC

An alloy and fast technology, which is applied in the field of rapid solidification Nb-Si based multi-component alloy and its preparation, can solve the problems of difficult matching of high and low temperature mechanical properties and high temperature oxidation resistance

Inactive Publication Date: 2017-11-07
BEIHANG UNIV
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims at the problem that it is difficult to match the high and low temperature mechanical properties and high temperature oxidation resistance of Nb-Si based multi-component alloys, and provides a kind of Nb-Si based multi-component alloys, which are obtained through reasonable component optimization design and r

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
  • Quickly-solidified Nb-Si-base multi-alloy containing SC
  • Quickly-solidified Nb-Si-base multi-alloy containing SC
  • Quickly-solidified Nb-Si-base multi-alloy containing SC

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-5

[0034] Examples 1-5 of the present invention respectively select the alloy composition (atomic percentage composition) as shown in Table 1. The alloy master ingot is obtained by vacuum non-consumable arc melting technology, and then the master alloy ingot is made into alloy powder by jet milling method, atomization method, rotating electrode method or one of other existing powder making methods. Rapid solidification is achieved by laser selective melting, and then the structure is observed after heat treatment, and the performance is tested. The specific process steps are as follows:

[0035] (1) carry out proportioning according to the nominal composition of embodiment 1-5 in table 1, take by weighing each component raw material with purity higher than 99.90wt%, wherein Sc is to add with Sc or AlSc master alloy, each component raw material is carried out Cleaning (including pickling, alkali washing to remove scale, using acetone and / or alcohol to remove oil) and grinding, the...

Embodiment 6-10

[0049] Examples 6-10 of the present invention respectively select the alloy composition (atomic percentage composition) as shown in Table 1 for 6-10 examples. The alloy master ingot is obtained by vacuum non-consumable arc melting technology, and then the master alloy ingot is made into alloy powder by jet milling method, atomization method, rotating electrode method or one of other existing powder making methods. The rapid solidification is achieved by electron beam selective melting, and then the structure is observed after heat treatment, and the performance is tested. The specific process steps are as follows:

[0050] (1) Proportioning is carried out according to the nominal composition of Examples 6-10 in Table 1, and each component raw material with a purity higher than 99.90wt% is weighed, wherein Sc is added with Sc or AlSc master alloy, and each component raw material is carried out Cleaning (including pickling, alkali washing to remove scale, using acetone and / or al...

Embodiment 1

[0065] The XRD of embodiment 1 is as figure 1 As shown, the microstructure of laser selective melting alloy is mainly composed of Nb SS Phase, Nb 5 Si 3 Phase and Nb 3 Si phase composition. figure 2 It is a comparison diagram of the microstructure of the alloy with the composition of Example 1 of the present invention after selective laser melting and conventional vacuum arc melting (without rapid solidification). image 3 It is a comparison diagram of the structure of the composition alloy of Example 1 of the present invention after electron beam selective melting and conventional vacuum arc melting (without rapid solidification). It can be found that the microstructure of the alloy is obviously refined by the rapid solidification method, the microstructure of the alloy without rapid solidification is relatively coarse, and the phase size is 30-90 μm, while the microstructure of the alloy undergoing selective laser melting is obviously refined, and the phase size 0.3-0....

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

No PUM Login to view more

Abstract

The invention discloses Nb-Si-base multi-alloy for preparing heat-end parts, such as working blades, guiding blades, tail pipes and combustion chambers, of aero-turbine engines or aerospace engines through quick solidification. Through the design of alloy compositions, in combination with the quick solidification, the solidification velocity is increased, and the structural characteristics of the alloy of this type are significantly changed, so that micro-structures are refined to be in micron scale or even nanometer scale from millimeter scale, and especially the sizes of intermetallic compounds are significantly refined; through proper heat treatment, the alloy has the advantages of high-low temperature mechanical properties and antioxidant properties.

Description

technical field [0001] The invention belongs to the field of ultra-high-temperature alloy materials, and relates to a type of hot-end parts that can be applied to aviation gas turbines, in particular to a rapidly solidified Nb-Si-based multi-element alloy and a preparation method thereof. Background technique [0002] With the continuous improvement of the thrust-to-weight ratio and working efficiency of aero-engines, the inlet temperature of the turbine rotor is required to be continuously increased, which puts forward high requirements on the temperature-bearing capacity of the materials used in the turbine blades. At present, the most advanced metal high-temperature structural material - nickel-based single crystal superalloy, its service temperature limit is about 1150 ° C, which is close to 85% of its melting point (about 1350 ° C), and the room for improvement is very limited, so there is an urgent need for research and development. A new ultra-high temperature structu...

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): C22C27/02C22C30/00C22C1/03C22F1/18C22F1/16
CPCC22C1/03C22C27/02C22C30/00C22F1/16C22F1/18
Inventor 贾丽娜张虎
Owner BEIHANG UNIV
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