Method for conducting boron alloying in electro-slag remelting process

A technology for electroslag remelting and boron alloying, which is applied in the field of electroslag remelting and can solve the problems of low boron yield in steel and the like

Active Publication Date: 2019-07-26
马鞍山市中桥金属材料有限公司
View PDF4 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the technical problem that the boron element is easily oxidized when the traditional electroslag remelting equipment is used to smelt boron-containing steel grades in the prior art, resulting in a low yield of boron in the steel. Alloying method; by adding a boron-containing alloy composed of Al-B-Fe in the remelting process, the oxidation of boron can be effectively reduced and the yield of boron in steel can be improved

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
  • Method for conducting boron alloying in electro-slag remelting process
  • Method for conducting boron alloying in electro-slag remelting process
  • Method for conducting boron alloying in electro-slag remelting process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] The steel type produced in this embodiment is S32205 duplex stainless steel, and its B content is 0.001%-0.004%. The target content of B in the finished steel ingot produced in this embodiment is 0.003%. The concrete production steps of this embodiment are:

[0042] Step 1. Deslagging the heavy slag. In this embodiment, graphite electrodes are used to deslag the heavy slag; and aluminum powder is added during the slag melting process. The amount of aluminum powder added can be: 100KG slag plus 0.2-04kgAl pink. In this embodiment, the slag system composition of the heavy melting slag is: CaF 2 :60%, Al 2 o 3 : 10%, CaO: 25%, B 2 o 3 :5%, its density is 2.5g / cm 3 , the added amount of heavy slag is:

[0043]

[0044] Where G is the amount of heavy slag added, in kg; ρ is the density of heavy slag, in g / cm 3 , the heavy slag density in this example is 2.50g / cm 3 D is the crystallizer diameter, the unit is cm, and the crystallizer diameter is 50cm in the present...

Embodiment 2

[0059] The steel type produced in this embodiment is 10Cr11Co3W3NiMoVNbNB steel for blades of ultra-supercritical units, and its B content is 0.010%-0.025%. The target content of B in the finished steel ingot produced in this embodiment is 0.020%. The concrete production steps of this embodiment are:

[0060] Step 1. Deslagging the heavy slag. In this embodiment, graphite electrodes are used to deslag the heavy slag; and aluminum powder is added during the deslagging process. In this embodiment, the slag system composition of the heavy slag is: CaF 2 :62%, Al 2 o 3 : 15%, CaO: 20%, B 2 o 3 :3%, its density is 2.48g / cm 3 , the added amount of heavy slag is:

[0061]

[0062] Where G is the amount of heavy slag added, in kg; ρ is the density of heavy slag, in g / cm 3 , the heavy slag density in this example is 2.48g / cm 3 , D is the crystallizer diameter, the unit is cm, and the crystallizer diameter is 80cm in the present embodiment. After calculation, the amount of h...

Embodiment 3

[0077] The steel type produced in this embodiment is S30815 super austenitic stainless steel with a B content of 0.002%-0.010%, and the target content of B in the finished steel ingot produced in this embodiment is 0.006%. The concrete production steps of this embodiment are:

[0078] Step 1. Deslagging the heavy slag. In this embodiment, graphite electrodes are used to deslag the heavy slag; and aluminum powder is added during the deslagging process. In this embodiment, the slag system composition of the heavy slag is: CaF 2 :66%, Al 2 o 3 : 10%, CaO: 20%, B 2 o 3 : 4%, its density is 2.53g / cm 3 , the added amount of heavy slag is:

[0079]

[0080] Where G is the amount of heavy slag added, in kg; ρ is the density of heavy slag, in g / cm 3 , the heavy slag density in this example is 2.53g / cm 3 , D is the crystallizer diameter, the unit is cm, and the crystallizer diameter is 60cm in the present embodiment. After calculation, the amount of heavy slag added in this ...

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
densityaaaaaaaaaa
sizeaaaaaaaaaa
Login to view more

Abstract

The invention discloses a method for conducting boron alloying in the electro-slag remelting process and relates to the technical field of electro-slag remelting. In the electro-slag remelting process, after a metal consumable electrode is inserted into a slag bath and starts remelting, boron-contained alloy composed of Al-B-Fe is added to the slag bath, and then boron alloying is conducted on steel of metal consumable electrode. The boron alloy is added into the slag bath, so that Al in the boron-contained alloy can locally conduct targeted deoxidation around the B element, it is avoided thatthe B element is oxidized in the adding process, and therefore the final yield of the B element is improved; in addition, after the boron-contained alloy composed of the Al-B-Fe is added, the boron-contained alloy can rapidly pass across the slag bath to float between interfaces of the slag bath and a melting bath, on one hand, doping can be avoided, and on the other hand, rapid alloying of molten steel is facilitated.

Description

technical field [0001] The invention relates to the technical field of electroslag remelting, in particular to a boron alloying method in the electroslag remelting process. Background technique [0002] As a new technology of special metallurgy, electroslag remelting plays a pivotal role in the special steel industry. The steel ingot after electroslag remelting has high purity, low sulfur content, less non-metallic inclusions, smooth surface of steel ingot, uniform and dense crystallization, uniform metallographic structure and chemical composition. This technology is being used more and more widely. Especially in the smelting of stainless steel, tool steel, mold steel and other special steels, it is more widely used. Among them, the boron-containing steel produced by electroslag remelting is widely used. At present, boron-containing super austenitic stainless steel, super duplex stainless steel and super critical steam turbine unit have been produced by electroslag remelti...

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): C22B9/18
CPCC22B9/18
Inventor 钱德桥钱强常立忠
Owner 马鞍山市中桥金属材料有限公司
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