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

Micro-alloy composite core-spun yarn for high-strength structure steel

A technology of micro-alloying and structural steel, which is applied in the field of composite cored wire, can solve the problems that it is difficult to apply high-strength and high-toughness structural steel smelting technology, and cannot improve the composition and structure of steel, and achieve a significant improvement in steel performance , high toughness, and the effect of improving the strength of steel

Inactive Publication Date: 2008-09-10
HUBEI KMK WELDING MATERIALS
View PDF2 Cites 22 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the defects and deficiencies in the prior art that cannot improve the composition and structure of steel, improve its mechanical properties and be difficult to apply to the smelting process of high-strength and high-toughness structural steel, and provide a microalloy for high-strength structural steel compound cored wire

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
  • Micro-alloy composite core-spun yarn for high-strength structure steel
  • Micro-alloy composite core-spun yarn for high-strength structure steel
  • Micro-alloy composite core-spun yarn for high-strength structure steel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The carbon steel sheath of the cored wire adopts 08Al steel strip with a thickness of 0.3-0.4 mm. The elemental components and mass % in the powdery inner core are: C 0.6, Ca 18, Si 45, Mg 0.3, Ba 0.5, rare earth Metal 0.2, B 0.3, Zr 1.6, Ti 1.2, Mn 0.08, P 0.2, S 0.2, Fe balance. The particle size of the powdery inner core is 0.5-2 mm. Preferably, in the powdery inner core, by mass %: the material with a particle size of 1.5-2 mm is less than 10, the material with a particle size of 1-1.5 mm is 60-70, and the balance is the material with a particle size below 1 mm. . The powdery inner core is wrapped with a carbon steel outer skin to make a cored wire with a diameter of 9-15 mm. It is used for continuous casting and smelting of KD type high-strength steel, namely strength (Rm≥800MPa), toughness (impact toughness CV=250-300J, -20℃) special structural steel. When refining outside the furnace, 1.5-3 kg of powdery inner core is added per ton of molten steel to feed the ...

Embodiment 2

[0021] The carbon steel sheath of the cored wire is a low-carbon steel strip with a thickness of 0.3-0.4 mm. The elemental components and mass % in the powdery inner core are: C 0.8, Ca 22, Si 50, Mg 0.6, Ba 1.5 , rare earth metal 0.5, B 0.7, Zr 2.0, Ti 1.8, Mn 0.12, P 0.6, S 0.6, Fe balance. All the other are with embodiment 1.

Embodiment 3

[0023] The carbon steel sheath of the cored wire is a low-carbon steel strip with a thickness of 0.3-0.4 mm. The elemental components and mass % in the powdery inner core are: C 0.8, Ca 21, Si 47, Mg 0.5, Ba 1.2 , rare earth metal 0.4, B 0.4, Zr 1.7, Ti 1.6, Mn 0.1, P 0.3, S 0.4, Fe balance. All the other are with embodiment 1.

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
Particle sizeaaaaaaaaaa
Particle sizeaaaaaaaaaa
Login to View More

Abstract

The invention provides a microalloy combined core-spun yarn for the high intensity structural steel, comprising a carbon steel sheath and a powder inner core, wherein, the element components and the mass percentage inside the powder inner core are as follows: C ranges from 0.6 to 0.9, Ca ranges from 18 to 22, Si ranges from 45 to 50, Mg ranges from 0.3 to 0.6, Ba ranges from 0.5 to 1.5, rare metal ranges from 0.2 to 0.5, B ranges from 0.3 to 0.7, Zr ranges from 1.6 to 2.0, Ti ranges from 1.2 to 1.8, Mn ranges from 0.08 to 0.12, P ranges from 0.2 to 0.6, S ranges from 0.2 to 0.6, and Fe occupies the rest percent. The microalloy combined core-spun yarn improves the steel intensity obviously, ensures that the lengthwise and transverse impact properties of the steel can be isotropic, thins crystal grains to ensure that the strip foreign substance is spherified and is distributed inside a base body, eliminates an aliquation line inside a continuously cast bloom, improves the performance, and is suitable for the outdoor refinement of the structural steel with the high intensity more than or equal to 800 MPa and the high impelling strength CV ranging from 250 to 300 J at 20 DEG C below zero.

Description

technical field [0001] The invention relates to a composite cored wire for steelmaking, in particular to a microalloyed composite cored wire for high-strength structural steel. It is suitable as a deoxidizing, desulfurizing and microalloying additive for steelmaking. Background technique [0002] Cored wire technology is a new technology of out-of-furnace refining developed on the basis of spray metallurgy technology. The existing cored wire is mainly used as a deoxidizing and desulfurizing agent for steelmaking, such as Chinese Patent Publication No.: CN1073722, Publication Date: June 30, 1993, Invention Name: "Composite Agent for Purifying Molten Steel and Its Application Method" , put forward the cored wire made of Ca, Mg, RE, Si, C, F and other raw materials through core wrapping, which has the advantages of low melting point, which is conducive to the accumulation and floating of inclusions in steel, etc. Good results. In terms of alloying, Chinese Patent Publication...

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): C21C7/00C21C7/04
Inventor 李志远樊兴龙
Owner HUBEI KMK WELDING MATERIALS
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