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

LF furnace nitrogen-control refining method

A slag and fast technology, applied in the field of nitrogen-controlled refining in LF furnace, can solve the problems of plasticity and toughness reduction, plasticity and toughness reduction, etc., and achieve the effect of ensuring deep drawing performance, reducing the degree of damage, and eliminating the phenomenon of yield point extension.

Inactive Publication Date: 2019-02-15
WUHU XINXING DUCTILE IRON PIPES
View PDF3 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the aging effect of nitrogen, the hardness and strength of steel increase, but the plasticity and toughness decrease, especially in the case of deformation aging, the decrease in plasticity and toughness is more significant

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
  • LF furnace nitrogen-control refining method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0016] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

[0017] The present invention provides a kind of LF furnace controlled nitrogen refining method, the method comprises:

[0018] Step 1, the step of melting the slag, adopts short arc and high power to quickly melt the slag;

[0019] Step 2, the rapid temperature rise step, after the slag material is melted, the electric arc is properly elongated and the input power is increased.

[0020] According to the above technical scheme, the present invention implements the specific method for controlling nitrogen in LF refining, the nitrogen content in the steel is effectively controlled, and the nitrogen content in the outbound LF refining is controlled below 50ppm, whi...

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

The invention discloses an LF furnace nitrogen-control refining method. The method comprises the steps that firstly, slag is melted, specifically, slag is melted rapidly through short arc and high power; and secondly, temperature is rapidly increased, specifically, after slag is melted, arc is lengthened properly, and input power is increased. Through the LF furnace nitrogen-control refining method, the nitrogen content in steel can be effectively controlled, and the deep drawing performance of the steel is ensured.

Description

technical field [0001] The invention relates to an LF furnace controlled nitrogen refining method. Background technique [0002] Please briefly describe the existing technology, and specifically point out what are the shortcomings of the existing technology? Since it is difficult to reduce nitrogen and control nitrogen in the subsequent process, nitrogen control in LF refining is more critical. Nitrogen will cause quenching aging and deformation aging of carbon steel, which will have a significant impact on the properties of carbon steel. Due to the aging effect of nitrogen, the hardness and strength of steel increase, but the plasticity and toughness decrease, especially in the case of deformation aging, the decrease in plasticity and toughness is more significant. Therefore, for common low-alloy steels, aging phenomena are detrimental, and thus nitrogen is a detrimental element. Contents of the invention [0003] The purpose of the present invention is to provide a LF...

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): C21C7/00C21C7/072C21C7/076
CPCC21C7/0056C21C7/072C21C7/076Y02P10/20
Inventor 王文培张洪彪李海胡岗范石伟介瑞华
Owner WUHU XINXING DUCTILE IRON PIPES
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