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

A method for eliminating centerline segregation of continuous casting slabs by using additive dilution

A continuous casting billet and centerline technology, applied in the field of continuous casting, can solve the problem of not putting forward implementation parameters, and achieve the effect of small deviation and good three-dimensionality

Active Publication Date: 2019-06-21
NORTHEASTERN UNIV LIAONING
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Domestic public reports (patents: CN200610044356.0, CN201210565960.3, CN201410799131.0) gave a general introduction to belt feeding equipment or technology, but did not propose specific implementation parameters

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 eliminating centerline segregation of continuous casting slabs by using additive dilution
  • A method for eliminating centerline segregation of continuous casting slabs by using additive dilution
  • A method for eliminating centerline segregation of continuous casting slabs by using additive dilution

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] like figure 1 As shown, the casting liquid flows out from the nozzle 1, and the casting liquid flows into the mold. The sidewall of the crystallizer continuously cools the liquid phase cavity 3 , so that the side and bottom of the liquid phase cavity 3 are continuously crystallized to form a mushy zone 4 , and the mushy zone 4 continues to cool down to form a solidified shell 5 . The solidified shell 5 is pulled out from below. The liquid phase cavity 3, the mushy zone 4 and the solidified billet shell 5 continuously flow and evolve, forming a continuous casting billet as a whole. Under the premise that the conditions remain unchanged, the boundary between the liquid cavity 3 and the mushy region 4 and the boundary between the mushy region 4 and the solidified shell 5 are stably located at a certain position and stably maintain a certain shape.

[0048] The continuous casting slab in this embodiment is a low-carbon continuous casting thick slab, and the following meth...

Embodiment 2

[0065] As the calculation result of embodiment 1, choose C 选1 =0.11wt%>C a1 , C 选2 =0.26wt%>C a2 ,C 选3 =1.40wt%>C a3 ,C 选4 =0.0137wt%>C a4 ,C 选5 =0.0012wt%>C a5 , C 选6 =0.011wt%>C a6 , manufacturing additive. The ratio of elements is better controlled, the additive manufacturing is convenient, and the process is simpler. It can also greatly reduce the central segregation of the continuous casting billet and solve the central shrinkage porosity.

Embodiment 3

[0067] As in Example 1, the impurity concentration C is added to the input of the macro model 标7 , including C in the final output a7 , choose C 选7 a7 Manufacturing additive, the additive section is annular, the difference between the inner and outer radii of the annular is 3mm, and the annular area is equal to 30mm 2 , Additive manufacturing is convenient. During the process of feeding the additive, the additive body 2 is subjected to vibration with an amplitude of 2 mm and a vibration frequency of 500 Hz. It can further improve the central performance of the continuous casting slab and solve the central shrinkage.

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 method for eliminating centerline segregation of continuous casting slabs by utilizing additive dilution, which includes: collecting production working condition parameters; determining the supply speed va, additive thickness d and additive width w, w>d; based on standard solute The concentration C standard calculates the segregation index at the end of the liquid core to obtain the solute concentration Coi, and inversely derives the solute concentration Ca of the additive; according to Ca ≤ C selection < C standard, the selected concentration C selection is obtained, and the selected concentration C is selected based on the additive thickness d, the additive width w and the selection Concentration C is selected, selecting and / or manufacturing additives, and continuously and vibratingly transporting the additives to the end of the liquid core. The method provided by the present invention utilizes additive dilution to eliminate centerline segregation of the continuous casting billet. The alloy composition ratio is used to reduce and eliminate centerline segregation. At the same time, additive materials can eliminate central shrinkage porosity. The additive is completely melted when it reaches the end of the liquid core. Under the action of vibration, the melted liquid mass is completely mixed with the casting liquid in the end of the liquid core; thereby simultaneously solving the two major internal quality defects of centerline segregation and center looseness in the continuous casting billet.

Description

technical field [0001] The invention relates to the field of continuous casting, in particular to a method for eliminating central line segregation of continuous casting slabs by using additive dilution. Background technique [0002] The central segregation of the continuous casting slab is accompanied by the porosity of the center, and the presence of internal inclusions will seriously deteriorate the performance of the slab. Pouring with high superheat is conducive to the floating of inclusions, but it will increase the degree of central segregation. Minimizing the degree of central segregation is very important to further improve the quality of the slab. [0003] In the conventional continuous casting production process, the methods that can reduce the center segregation have been adopted so far: electromagnetic stirring at the end of solidification and light reduction, etc. However, these measures have some disadvantages. It is difficult to accurately determine the pos...

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): B22D11/108B22D11/112B22D11/114B22D11/18
CPCB22D11/108B22D11/112B22D11/114B22D11/18
Inventor 李宝宽牛冉刘中秋卜立夫李向龙
Owner NORTHEASTERN UNIV LIAONING
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