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

Preparation process of nickel-based high temperature alloy with high-content refractory elements

A technology of nickel-based superalloy and preparation process, applied in the direction of improving process efficiency, improving energy efficiency, etc., can solve the problems of component segregation, abnormal tissue heredity, etc. The effect of secondary shrinkage

Active Publication Date: 2019-06-21
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
View PDF2 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a process for preparing nickel-based superalloys with high content of refractory elements, which effectively solves the problems of composition segregation and abnormal tissue inheritance of nickel-based superalloys with high content of refractory elements, and prepares Superalloys with good mechanical properties

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
  • Preparation process of nickel-based high temperature alloy with high-content refractory elements
  • Preparation process of nickel-based high temperature alloy with high-content refractory elements
  • Preparation process of nickel-based high temperature alloy with high-content refractory elements

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] In this example, a high-W alloyed nickel-based superalloy was prepared by the VIM+ESR process. The composition of the alloy ingredients is shown in Table 1, wherein the W element is a refractory element with a content of 16wt.%. In this embodiment, an alloy material ingot (master alloy ingot) is firstly prepared by a vacuum induction melting process, and then electroslag remelting (ESR) is performed on the master alloy ingot to obtain the nickel-based superalloy with a high content of refractory elements; the The process specifically includes the following steps:

[0045] (1) Feeding to ensure stable carbon alloying and preliminary deoxidation:

[0046] Clean the inside of the crucible, add carbon element raw materials to the bottom of the crucible, then add all other element raw materials (cobalt, chromium, nickel, niobium, hafnium) except aluminum, titanium and W, and finally add refractory element W to the upper part of the crucible It is added in the form of master...

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
thicknessaaaaaaaaaa
melting pointaaaaaaaaaa
Login to View More

Abstract

The invention discloses a preparation process of a nickel-based high temperature alloy with high-content refractory elements, and belongs to the technical field of alloy preparation. According to theprocess, a vacuum induction melting (VIM) and electroslag remelting (ESR) process is adopted for preparing the alloy containing the high-content refractory elements. During the vacuum induction melting stage, by controlling the feeding mode, increasing the refining temperature, prolonging the refining time, accelerating the solidification rate and the like, the segregation phenomena of refractorymetal and low-density alloy elements are effectively suppressed, and the composition uniformity of upper and lower parts of a parent alloy ingot is improved. Through electroslag remelting, secondary shrinkage in the alloy ingot is eliminated, the impurity content is reduced, and the metallurgical quality is improved. The preparation process can significantly reduce the microsegregation and macrosegregation phenomena of the high-content refractory elements and can effectively reduce the content of harmful gas elements such as O and N in the high-temperature alloy, the purity of the alloy is improved, the degree of segregation of the high-specific gravity elements is reduced, the heredity of alloy anomalous tissues is improved, and the overall mechanical properties of the alloy are improved.

Description

technical field [0001] The invention relates to the technical field of alloy preparation, in particular to a preparation process of a nickel-based superalloy with high content of refractory elements. Background technique [0002] Nickel-based superalloys have been widely used in key hot-end components of aero-engines and gas turbines. As the service conditions become increasingly harsh, service materials are required to have higher temperature bearing capacity. High alloying (including W, Ta and other elements) is An effective way to improve the thermal strength of materials has been widely accepted by metallurgists. With the increase of alloying degree and refractory metal elements, the segregation of elements in the alloy will be aggravated, which will affect the uniformity of the composition and structure of the master alloy. At present, the smelting method of casting superalloys in my country is mainly based on vacuum induction melting. The equipment is a vacuum smeltin...

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 Applications(China)
IPC IPC(8): C22C19/05C22C1/03C22B9/18
CPCY02P10/25
Inventor 谢君侯桂臣仉凤江王振江荀淑玲周亦胄孙晓峰
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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