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

Method for conticaster controlling solidification structure of casting block

A continuous casting machine and slab technology, which is applied in the field of continuous steel casting in the metallurgical industry, can solve the difficult problems of slab center shrinkage and center porosity, large equipment investment, composition segregation, etc., and achieve grain refinement, Low operating cost and the effect of eliminating subcutaneous air bubbles

Inactive Publication Date: 2009-06-03
ANHUI UNIVERSITY OF TECHNOLOGY
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, electromagnetic stirring is widely used in industry, but electromagnetic stirring not only consumes a lot of energy, but also produces bright white bands in the solidification structure of the cast slab, component segregation, and sometimes ring segregation. Electromagnetic stirring also has a limitation. , the molten steel can only be stirred in a small local area, but not the entire liquid phase cavity of the continuous casting slab. It is difficult to solve the central shrinkage cavity and central porosity of the slab. In addition, the investment in electromagnetic stirring equipment is also low. very big

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 conticaster controlling solidification structure of casting block
  • Method for conticaster controlling solidification structure of casting block

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] When the 5-strand billet continuous casting machine in a steel plant was casting normally, before the test, a 500mm continuous casting billet was taken from the flame cutting place of the first-class billet for low-magnification comparative analysis. Then insert a cermet electrode with a diameter of 10mm into the first-class 150×150mm crystallizer of the casting machine, and the depth of the electrode inserted into the molten steel is 100mm; the positive pole of the high-frequency pulse power supply is connected to the raceway bearing sleeve of the tension leveler with a cable (grounded). An 8V high-frequency pulse electric field is passed through the two electrodes, and the high-frequency pulse current value is 180A. The casting speed of the continuous casting machine is 2.1m / min, the casting steel is low-alloy steel, and the pouring temperature of the tundish is 1520°C. After 30 minutes, at the first-class flame cutting place, a 500mm continuous casting slab was taken...

Embodiment 2

[0018] When the six-strand billet continuous casting machine in a steel plant is in normal production, before the high-frequency pulse electric field treatment, a 500mm continuous casting billet is taken from the flame cutting place of the first-class billet for low-magnification comparative analysis. Then insert an aluminum carbon electrode with a diameter of 100mm and a length of 1500mm into the tundish of the casting machine. The depth of the electrode inserted into the molten steel is 700mm; the positive pole of the high-frequency pulse power supply is connected to the foundation of the continuous casting machine with a cable (grounded). A 12V high-frequency pulse electric field is passed through the two electrodes, and the high-frequency pulse current value is 480A. The casting speed of the continuous casting machine is 2.2m / min, the casting steel type is 20MnSi, and the tundish pouring temperature is 1530°C. After 30 minutes, at the first-class flame cutting place, a 500...

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

A method for the conticaster to control the solidified structure of cast blank includes providing a HF pulse power supply with positive and negative electrodes, inserting its negative electrode into the molten steel in the crystallizer or tundish of conticaster, electrically connecting its positive eletrode with the steel base of conticaster, and conticasting while regulating the voltages, current and frequency to improve the performance of cast blank.

Description

Technical field: [0001] The invention belongs to the technical field of continuous steel casting production in the metallurgical industry, and in particular relates to a method for controlling the solidification structure of a billet for a continuous casting machine to refine the crystal grains, increase the equiaxed crystal ratio and reduce cracks. Background technique: [0002] The quality of steel has a certain relationship with the smelting process of steel. The solidification process of molten steel has an important impact on the quality of steel. Defects such as inclusions, cracks, segregation, and porosity in steel are formed during the solidification process. High-quality slabs must effectively control the solidification process to inhibit the growth of columnar grains, promote the growth of equiaxed grains, refine grains, reduce composition segregation, and avoid central shrinkage and porosity. [0003] From the perspective of the existing technology, there are two ...

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): B22D11/11
Inventor 王建军周俐李卫国
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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