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

Production method for reducing grade A inclusion rating of titanium-containing steel

A production method and a technology of inclusions, applied in the field of iron and steel smelting, can solve the problems of reducing the transverse elongation and area shrinkage of steel, cracks in casting slabs, reducing the pitting corrosion resistance and crevice corrosion resistance of steel, etc.

Inactive Publication Date: 2020-07-28
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
View PDF10 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

MnS will reduce the pitting corrosion resistance and crevice corrosion resistance of the steel; excessive sulfide inclusions in the steel will reduce the transverse elongation and section shrinkage of the steel; during the rolling process, excessive sulfide will lead to cracks in the billet

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

[0038] Embodiment 1 adopts the inventive method to produce 20CrMnTi gear steel

[0039] Preparation of titanium dioxide cored wire: including preparing the core layer of the cored wire and wrapping the core layer through the sheath to form a round pipe. The core layer is composed of titanium dioxide powder (purity greater than 99%), the average particle diameter of the titanium dioxide powder is 50nm, and the particle diameter ranges from 10nm to 90nm. The outer skin is made of low-carbon cold-rolled strip steel, with a thickness of 2mm. The outer diameter of the entire cored wire is 10 mm.

[0040] When producing 20CrMnTi gear steel, the S content in the steel is 0.020%, and the Ti content is 0.060%. After the RH refining is finished and before leaving the station, feed the above-mentioned cored wire into the molten steel. Before feeding the wire, blow argon to the ladle at the bottom, so that the diameter of the molten steel surface exposed on the slag surface of the ladle...

Embodiment 2

[0042] Embodiment 2 adopts the inventive method to produce 20CrMnTi gear steel

[0043] Preparation of titanium dioxide cored wire: including preparing the core layer of the cored wire and wrapping the core layer through the sheath to form a round pipe. The core layer is composed of titanium dioxide powder (purity greater than 99%), the average particle diameter of the titanium dioxide powder is 60nm, and the particle diameter ranges from 5nm to 95nm. The outer skin is made of low-carbon cold-rolled strip steel, with a thickness of 2mm. The outer diameter of the entire cored wire is 15mm.

[0044]When producing 20CrMnTi gear steel, the S content in the steel is 0.030%, and the Ti content is 0.070%. After the RH refining is finished and before leaving the station, feed the above-mentioned cored wire into the molten steel. Before feeding the wire, blow argon to the ladle at the bottom, so that the diameter of the molten steel surface on the slag surface of the ladle is 30cm, a...

Embodiment 3

[0046] Embodiment 3 adopts the inventive method to produce 20MnTiB alloy structural steel

[0047] Preparation of titanium dioxide cored wire: including preparing the core layer of the cored wire and wrapping the core layer through the sheath to form a round pipe. The core layer is composed of titanium dioxide powder (purity greater than 99%), the average particle diameter of the titanium dioxide powder is 55nm, and the particle diameter ranges from 15nm to 98nm. The outer skin is made of low-carbon cold-rolled strip steel, with a thickness of 2mm. The outer diameter of the entire cored wire is 20 mm.

[0048] When producing 20MnTiB alloy structural steel, the S content in the steel is 0.028%, and the Ti content is 0.08%. After the RH refining is finished and before leaving the station, feed the above-mentioned cored wire into the molten steel. Before feeding the wire, blow argon to the ladle at the bottom, so that the diameter of the molten steel surface exposed on the slag...

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 diameteraaaaaaaaaa
particle diameteraaaaaaaaaa
particle sizeaaaaaaaaaa
Login to View More

Abstract

The invention relates to a production method for reducing grade A inclusion rating of titanium-containing steel, and belongs to the technical field of steel smelting. The production method for reducing the grade A inclusion rating of the titanium-containing steel comprises the following steps of: during a smelting process, feeding a core-spun yarn containing titanium dioxide powder to molten steelin 2-5 batches, wherein a feeding speed is 1-4 m / s, the total amount of the fed titanium dioxide is controlled to be 40-120 ppm, the core-spun yarn is composed of two parts: an outer skin and a corelayer, and the core layer is composed of the titanium dioxide powder with a particle size of 5-300 nm. The application of the production method can solve the situation of sulfide inclusion and exceeding the standard of most steel companies at present, and meet the production requirements of the steel with higher requirements on the grade A inclusion, such as sulfur-containing alloy structural steel, sulfur-containing free-cutting steel, etc.

Description

technical field [0001] The invention relates to a production method for reducing the rating of A-type inclusions in titanium-containing steel, and belongs to the technical field of iron and steel smelting. Background technique [0002] With the vigorous development of the iron and steel industry, the requirements for the comprehensive performance of steel are getting higher and higher, and the requirements for the cleanliness of molten steel are also becoming more and more stringent. However, non-metallic inclusions will inevitably be introduced during the smelting process, which will endanger the properties of the steel. For example: an appropriate amount of sulfide in steel can improve the electromagnetic properties and machinability of steel, but if the content is too much, it will reduce the hot workability and corrosion resistance of steel. Since the affinity of S element in molten steel to Mn, Ni, Ti, Zr and other elements is much greater than that of Fe, it is easy t...

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): C21C7/00C22C38/28
CPCC21C7/0056C22C38/28
Inventor 陈亮陈天明李红光郭奠荣
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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