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

500MPa-grade vanadium-titanium microalloyed hot-rolled steel bar and production method thereof

A technology of microalloying and production methods, applied in metal rolling, metal rolling, metal processing equipment, etc., can solve problems such as high alloy element content, unreasonable element matching, and insufficient strengthening effect, so as to improve economic benefits, The effect of improving the utilization rate and the process is simple and easy to operate

Active Publication Date: 2022-04-08
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP +1
View PDF9 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The invention overcomes the problems of high alloy element content, low alloy utilization rate and insufficient strengthening effect in current V or Ti single-element micro-alloyed hot-rolled steel bars, and simultaneously solves the problems of existing V-Ti binary micro-alloyed hot-rolled steel bars The problem of unreasonable matching of elements in the technical scheme maximizes the strengthening effect of alloy elements, reduces the cost of alloys, and saves precious alloy resources

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
  • 500MPa-grade vanadium-titanium microalloyed hot-rolled steel bar and production method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] This example is used to illustrate the 500MPa grade vanadium-titanium microalloyed hot-rolled steel bar and its production method described in the present invention.

[0064] Smelting molten iron into molten steel; when the temperature of molten steel reaches 1700°C and the composition of molten steel reaches C: 0.05%, P: 0.01%, and S: 0.03% by mass fraction, the steel is tapped; during the process of 1 / 3 to 3 / 4 of the tapping amount In the process, silicon and manganese are added to the ladle for deoxidation alloying; after tapping is completed, the ladle is transported to the refining station for alloying; first, the composition of molten steel is adjusted to C: 0.22%, Si: 0.2%, Mn: 1.37 %, V: 0.06%; then, add titanium according to the Si, Mn, and V contents of the molten steel, and the Ti mass fraction reaches 0.05%, satisfying the relationship (1): [Si]+1.6[Mn]+29.3[V]-220 [V] 2 +666.7[V] 3 +47.3[Ti] - 258.8[Ti] 2 +487.9[Ti] 3 =5.28; finally, the molten steel wi...

Embodiment 2

[0068] This example is used to illustrate the 500MPa grade vanadium-titanium microalloyed hot-rolled steel bar and its production method described in the present invention.

[0069] Melt scrap steel into molten steel; when the temperature of molten steel reaches 1640°C and the composition of molten steel reaches C: 0.2%, P: 0.02%, and S: 0.015% by mass fraction, the steel is tapped; when the tapping amount is 1 / 3 to 3 / 4 During the process, silicon and manganese are added to the ladle for deoxidation and alloying; aluminum is added for deoxidation during the tapping process; after the tapping is completed, the ladle is transported to the refining station for alloying; the ladle is bottom-blown with argon in the refining station; first , adjust the composition of molten steel to reach C: 0.23%, Si: 0.65%, Mn: 1.0%, V: 0.01% according to the mass fraction; then, add ferro-titanium alloy according to the Si, Mn, and V contents of the molten steel, and the Ti mass fraction reaches 0...

Embodiment 3

[0074] This example is used to illustrate the 500MPa grade vanadium-titanium microalloyed hot-rolled steel bar and its production method described in the present invention.

[0075] Melt molten iron and scrap steel into molten steel; when the temperature of molten steel reaches 1650°C and the composition of molten steel reaches C: 0.06%, P: 0.045%, and S: 0.01% by mass fraction, the steel is tapped; when the tapping amount is 1 / 3 to 3 During the / 4 process, silicon and manganese are added to the ladle for deoxidation and alloying; after tapping is completed, the ladle is transported to the refining station, where aluminum is added for deoxidation and alloying; first, the composition of molten steel is adjusted to reach C: 0.25% by mass fraction , Si: 0.45%, Mn: 1.6%, V: 0.03%; then, according to the content of Si, Mn, and V in molten steel, titanium cored wire is fed, and the mass fraction of Ti reaches 0.08%, which satisfies the relationship (1): [Si ]+1.6[Mn]+29.3[V]-220[V] ...

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
sizeaaaaaaaaaa
yield strengthaaaaaaaaaa
tensile strengthaaaaaaaaaa
Login to View More

Abstract

The invention relates to the technical field of steel production, in particular to a 500 MPa-grade vanadium-titanium microalloyed hot-rolled steel bar and a production method thereof. Based on the total mass of the 500MPa-grade vanadium-titanium microalloyed hot-rolled steel bar, the 500MPa-grade vanadium-titanium microalloyed hot-rolled steel bar comprises the following chemical components in percentage by mass: 0.2-0.8% of Si, 1.0-1.6% of Mn, 0.01-0.10% of V and 0.01-0.15% of Ti, and the contents of Si, Mn, V and Ti meet the following conditions: 5.0 < [Si] + 1.6 [Mn] + 29.3 [V]-220 [V] < 2 > + 666.7 [V] < 3 > + 47.3 [Ti]-258.8 [Ti] < 2 > + 487.9 [Ti] < 7.0. By limiting the reasonable matching relation of the alloy elements, the strengthening effect of the alloy elements is brought into full play, the utilization rate of the alloy elements is increased, and meanwhile the product quality performance is guaranteed.

Description

technical field [0001] The invention relates to the technical field of iron and steel production, in particular to a 500MPa vanadium-titanium microalloyed hot-rolled steel bar and a production method thereof. Background technique [0002] Rebar is an important raw material in construction, transportation, engineering and other fields. It has the largest output and widest application in steel products. The promotion and application of high-strength steel bars can reduce the amount of steel used and optimize the design of building structures, which is of great significance for promoting energy saving and emission reduction and eliminating backward production capacity. At present, the application of hot-rolled threaded steel bars in my country is mainly 400MPa grade, and the amount of 500MPa grade steel bars is relatively small, which still needs to be further promoted and applied. For a long time, the production of high-strength steel bars has been dominated by vanadium micro...

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): C22C38/02C22C38/04C22C38/06C22C38/12C22C38/14C22C38/60B21B1/18B21B1/46B21B3/00B21B37/74B21B43/00C21C7/00C21C7/06C21D8/06C22C33/04
CPCY02P10/20
Inventor 郭跃华王超刘明赵小天邓通武陈天明
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