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

A method for improving the performance of nickel-chromium-iron electric heating alloy

A technology of electrothermal alloy and nickel-chromium iron, which is applied in the field of electrothermal alloy material preparation, can solve problems such as gaps and uneven product quality, and achieve the effects of increasing service life, improving oxidation resistance, and improving mechanical properties

Active Publication Date: 2017-02-15
YANCHENG XINYANG ELECTROTHERMAL MATERIAL CO LTD
View PDF9 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are as many as hundreds of manufacturers specializing in the production of electric heating alloys in my country, but the product quality is uneven, and the quality and service life of Cr20Ni35 products are far behind those of imported alloy wires.

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
  • A method for improving the performance of nickel-chromium-iron electric heating alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0019] Further illustrate and understand the present invention through embodiment below.

[0020] A method for improving the performance of a nickel-chromium-iron electrothermal alloy, characterized in that the method comprises the following steps: (1) preparing a master alloy ingot by using a non-consumable electromagnetic induction melting process, the elemental composition and quality of the master alloy ingot The ratio is: C: 0.08%, Si: 0.3%, Mn: 0.5%, Al: 2.5%, Cr: 12%, Ni: 44%, Hf: 1.6%, Nb: 2%, V: 1.1%, Mo : 1.7%, B: 0.09%, S ≤ 0.001%, P ≤ 0.001%, the balance is iron and unavoidable impurities; (2) The master alloy is prepared by powder metallurgy process, including: 1-3 micron high-purity nickel powder and 0.1-0.2 micron yttrium oxide powder are mixed evenly by mechanical ball milling, the mass ratio of the two is 100:5, and the ball milling time is 55 hours. After mixing evenly, put the above powder into the discharge plasma sintering equipment, and add Edge pressing...

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 relates to a preparation method of an electrothermal alloy material, and in particular relates to a method for improving the performance of a nickel-chromium-iron electrothermal alloy. According to a powder metallurgy method, high-purity nickel powder and yttria powder are mixed together so as to prepare an intermediate alloy; the intermediate alloy and a mother alloy ingot are smelted, a large number of crystalline grains are formed by taking metal oxide particles with high melting points and small sizes in the intermediate alloy as a nucleation center, thus obtaining an alloy ingot with small crystalline grains. The microstructure of a finished product of alloy wire can be effectively improved by carrying out subsequent processes such as heat treatment, hot rolled wire rod coiling and multi-pass drawing on the alloy ingot with small crystalline grains. Thus, the mechanical performance, the electrical resistivity and the service life of the alloy wires are effectively improved and prolonged.

Description

[0001] Technical field: [0002] The invention relates to a method for preparing an electrothermal alloy material, in particular to a method for improving the performance of a nickel-chromium-iron electrothermal alloy. [0003] Background technique: [0004] Electrothermal alloy is an alloy material used to manufacture electric heating elements. When current passes through the alloy element, the Joule effect occurs, converting electrical energy into heat energy. At present, electrothermal alloys have become an important engineering alloy material and occupy an important position in the national economy. According to the chemical composition, electrothermal alloys can be divided into three series: nickel-chromium alloy, nickel-chromium-iron alloy and iron-chromium-aluminum alloy. Among them, Cr20Ni35 is a typical representative of nickel-chromium-iron alloy. Its maximum service temperature is 1100 ℃, which belongs to the medium temperature grade electrothermal alloy. There are ...

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 Patents(China)
IPC IPC(8): C22C1/03C22C30/00C22F1/10
Inventor 郭健郭小芳郭乃林
Owner YANCHENG XINYANG ELECTROTHERMAL MATERIAL CO LTD
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