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

Boron containing steel chamfering copper plate continuous casting crystallizer casting powder

A continuous casting crystallizer and mold flux technology, which is applied in the field of steelmaking, can solve problems such as corner cracks, continuous casting crystallizer angle cracks, and reduce grain boundary fluidity, so as to achieve good air isolation and vertical Cracks, the effect of improving the absorption rate

Inactive Publication Date: 2018-06-19
XIXIA LONGCHENG METALLURGICAL MATERIALS CO LTD
View PDF9 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The continuous precipitation of boron nitride will reduce the fluidity of the grain boundary and increase the crystallization temperature. At the same time, because the grain boundary cannot migrate, the stress will accumulate at the grain boundary, resulting in edge cracks
Although the current chamfering crystallizer changes the right angle of the traditional continuous casting slab into an obtuse angle and increases the temperature of the corner of the continuous casting slab in the straightening zone, which is beneficial to eliminate the defect of the transverse crack at the corner of the continuous casting slab, it cannot completely solve the transverse crack at the corner
Therefore, it is still a big problem to solve the angle cracks of the continuous casting mold of boron-containing steel chamfering copper plate

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A boron-containing steel chamfering copper plate continuous casting mold powder, its chemical composition and weight percentage are: CaO: 35%, SiO 2 : 26%, MgO: 9%, Li 2 O: 1.2%, Al 2 o 3 : 9.3%, Na 2 O: 8%, F: 4% and C: 7.5%.

[0018] The basicity of the mold flux is CaO / SiO 2 It is 1.35, the melting point is 1110°C, and the viscosity at 1300°C is 0.32Pa·s.

[0019] When pouring 210mm×2100mm boron-containing steel continuous casting slabs, the mold flux of this example is used, the casting speed is 0.8 m / min, the thickness of the liquid slag layer is 8 mm, and the mold flux consumption is 0.5 kg / ton of steel. The cracks in the cast slab are obvious The probability of slab cracks is less than 0.1%, and there is no surface edge crack, which effectively improves the crack problem of boron-containing steel.

Embodiment 2

[0021] A kind of boron-containing steel chamfering copper plate continuous casting mold powder, its chemical composition and weight percentage are: CaO: 36.5%, SiO 2 : 25%, MgO: 8%, Li 2 O: 1.5%, Al 2 o 3 : 10%, Na 2 O: 7%, F: 5% and C: 7%.

[0022] The basicity of the mold flux is CaO / SiO 2 It is 1.46, the melting point is 1120°C, and the viscosity at 1300°C is 0.4Pa·s.

[0023] When pouring 220mm×1900mm boron-containing steel continuous casting slabs, the mold flux of this example is used, the casting speed is 1.0 m / min, the thickness of the liquid slag layer is 9 mm, and the mold flux consumption is 0.43 kg / ton of steel. The cracks in the cast slab are obvious The probability of slab cracks is less than 0.1%, and there is no surface edge crack, which effectively improves the crack problem of boron-containing steel.

Embodiment 3

[0025] A kind of boron-containing steel chamfering copper plate continuous casting mold powder, its chemical composition and weight percentage are: CaO: 37%, SiO 2 : 26%, MgO: 9%, Li 2 O: 1.8%, Al 2 o 3 : 9%, Na 2 O: 6.7%, F: 4.5% and C: 6%.

[0026] The basicity of the mold flux is CaO / SiO 2 It is 1.42, the melting point is 1110°C, and the viscosity at 1300°C is 0.25Pa·s.

[0027] When pouring 200 mm×1950 mm boron-containing steel continuous casting slabs, the mold flux of this example is used, the casting speed is 1.0 m / min, the thickness of the liquid slag layer is 10 mm, and the consumption of mold flux is 0.3 kg / ton of steel. Significantly reduced, the probability of slab cracks is less than 0.1%, and there is no surface edge crack, which effectively improves the crack problem of boron-containing steel.

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
melting pointaaaaaaaaaa
viscosityaaaaaaaaaa
melting pointaaaaaaaaaa
Login to View More

Abstract

The invention belongs to the technical field of steel making, and particularly relates to boron containing steel chamfering copper plate continuous casting crystallizer casting powder. The boron containing steel chamfering copper plate continuous casting crystallizer casting powder comprises the following components in percentage by weight: 35%-42% of CaO, 25%-32% of SiO2, 5%-10% of Mg, 1%-2% of Li2O, 4%-10% of Al2O3, 4%-8% of Na2O, 2%-6% of F and 4%-8% of C. The boron containing steel chamfering copper plate continuous casting crystallizer casting powder has relatively high alkalinity and relatively low viscosity and effectively solves the problem of cracking of boron containing steel.

Description

technical field [0001] The invention belongs to the technical field of steelmaking, and in particular relates to mold slag for a boron-containing steel chamfering copper plate continuous casting crystallizer. Background technique [0002] Boron-containing steel refers to steel with a boron content of 0.001%-0.003%. The chemical properties of boron are extremely active, and it is easy to combine with oxygen and nitrogen in molten steel to form boron oxide and boron nitride. precipitation in the world. The continuous precipitation of boron nitride will reduce the fluidity of the grain boundary and increase the crystallization temperature. At the same time, because the grain boundary cannot migrate, the stress will accumulate at the grain boundary, resulting in edge cracks. Although the current chamfering crystallizer changes the right angle of the traditional continuous casting slab into an obtuse angle and increases the temperature of the corner of the continuous casting sla...

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): B22D11/111
CPCB22D11/111
Inventor 朱书成别飞雄徐金岩彭会志程永彦王岩庞天敏
Owner XIXIA LONGCHENG METALLURGICAL MATERIALS 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