Continuous casting method for low-alloy steel wide and thick slabs

A low-alloy steel and continuous casting technology, applied in the field of continuous casting, can solve the problems of many alarm billets, affecting production stability and product quality, and large cross-sectional area, so as to reduce the probability of bonding breakout and reduce sticking. The trend of breakout and the effect of lower breakout alarm rate

Inactive Publication Date: 2014-09-24
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
View PDF6 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the continuous casting of low-alloy steel wide and thick slabs, due to the large cross-sectional area of ​​the slab, the breakout alarm rate is high. Once a breakout alarm occurs, the casting speed of the continuous casting machine will decrease rapidly, and the corresponding position on the slab Inverted "V"-shaped vibration marks will be formed, resulting in more alarm slabs (referring to cast s

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
  • Continuous casting method for low-alloy steel wide and thick slabs
  • Continuous casting method for low-alloy steel wide and thick slabs
  • Continuous casting method for low-alloy steel wide and thick slabs

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0036] Example

[0037] Carry out 10 groups of continuous casting operations to produce low alloy steel wide and thick slabs, the steel type of low alloy steel wide and thick slabs produced by groups 1 to 8 is Q345, and the steel of low alloy steel wide and thick slabs produced by groups 9 and 10 The two types are P510L and X80 respectively, wherein Groups 1-6, Group 9 and Group 10 are cast by the method of the present invention, and Groups 7 and 8 are comparative examples. Each group casts 1000 furnaces of molten steel. The continuous casting equipment used in these 10 groups of continuous casting operations is a straight arc continuous casting machine. In each continuous casting operation, molten steel is poured from the tundish to the crystallizer, and the A stopper rod is set, and in the crystallizer, mold slag is added on the liquid surface of the molten steel, and the mold slag added to the liquid surface of the molten steel forms a liquid slag layer, and the molten stee...

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
Viscosityaaaaaaaaaa
Melting pointaaaaaaaaaa
Thicknessaaaaaaaaaa
Login to view more

Abstract

The invention discloses a continuous casting method for low-alloy steel wide and thick slabs. The continuous casting method comprises the following steps: pouring molten steel from a tundish into a crystallizer; in the crystallizer, adding casting powder on the liquid level of molten steel; cooling in the crystallizer, so that the molten steel is solidified into casting blanks with liquid cores, and then continuously pulling out the casting blanks with the liquid cores from the outlet of the crystallizer at a pulling speed Vc to pass through a secondary cooling zone so as to obtain completely solidified casting blanks, wherein the pulling speed Vc is controlled at 1.2-1.8 m/min, the binary basicity of the casting powder is 0.85-1.05, the viscosity of the casting powder is 0.05-0.15 Pa.s at 1300 DEG C, and the melting point of the casting powder is 1050-1150 DEG C. As the physical and chemical properties of the casting powder are reasonably controlled, the continuous casting method can effectively reduce the steel leakage alarm rate and that the continuity of production and the product quality are ensured is facilitated.

Description

technical field [0001] The invention relates to the field of continuous casting, in particular to a method for continuous casting of low-alloy steel wide and thick slabs. Background technique [0002] High-efficiency constant-speed continuous casting technology is currently the research direction of metallurgical circles at home and abroad. In the continuous casting production process, steel breakout is one of the most harmful production accidents. It affects the stability and continuity of operations, product quality, The safety of operators and the service life of equipment are adversely affected. Therefore, at present, steel breakout prediction systems are mostly used to avoid steel breakout accidents. Reduce to a lower level (eg 0.2m / min) to eliminate the hidden danger of steel leakage. For the continuous casting of low-alloy steel wide and thick slabs, due to the large cross-sectional area of ​​the slab, the breakout alarm rate is high. Once a breakout alarm occurs, th...

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
IPC IPC(8): B22D11/111B22D11/117B22D11/16
Inventor 潘红陈永吴国荣曾建华李志强陈刚
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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