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

345mpa-grade vanadium-titanium microalloyed hot-rolled steel strip for anti-seismic structure and preparation method thereof

A technology of microalloying and anti-vibration structure, applied in the field of microalloying, hot continuous rolling steel strip and its production, can solve the problems of high alloy cost, poor equipment and process adaptability, undisclosed equipment conditions, etc., and achieves low alloy cost, Narrow intensity fluctuation range, high ductility effect

Active Publication Date: 2018-07-10
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
View PDF9 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The anti-seismic steel prepared by this invention adds a large number of microalloying elements to increase the weather resistance and hardenability of the steel plate, and the cost of the alloy is high. At the same time, the invention does not disclose the equipment conditions, and its equipment and process adaptability is poor

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
  • 345mpa-grade vanadium-titanium microalloyed hot-rolled steel strip for anti-seismic structure and preparation method thereof
  • 345mpa-grade vanadium-titanium microalloyed hot-rolled steel strip for anti-seismic structure and preparation method thereof
  • 345mpa-grade vanadium-titanium microalloyed hot-rolled steel strip for anti-seismic structure and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] The 10.85mm thick 345MPa grade seismic structural steel adopts vanadium-titanium micro-alloying composition route, and undergoes molten iron pretreatment, converter smelting, LF heating furnace refining, and continuous casting to obtain billets. The specific chemical composition weight percentage is: 0.16%C-0.19 %Si-1.10%Mn-0.03%V-0.025%Ti-0.016%P-0.004%S; billet reheating temperature is 1245℃, reheating time is 280min; The ratio is 26%, 27%, 29%, 30%, 30%, and the thickness of the intermediate billet is 38mm; the finishing rolling is 6-stand hot continuous rolling, and the reduction ratio of each pass is 35%, 34%, 0, 27 %, 0, 11%, the finish rolling temperature is 841°C, after finish rolling, it is cooled to 600°C at a cooling rate of 16.8°C / s by means of sparse cooling.

[0052] After testing, the microstructure and properties of the 345MPa-grade seismic steel produced in this example are: Rel: 395MPa, Rm: 543MPa, A: 26.0%, Rel / Rm: 0.73, longitudinal impact energy at ...

Embodiment 2

[0054] The 7.5mm-thick 345MPa-grade anti-seismic structural steel adopts the composition route of vanadium-titanium microalloying, and the steel billet is obtained through molten iron pretreatment, converter smelting, LF heating furnace refining, and continuous casting. The specific chemical composition weight percentage is: 0.15%C-0.13 %Si-1.0%Mn-0.04%V-0.026%Ti-0.014%P-0.010%S; billet reheating temperature is 1220℃, reheating time is 305min; Rates are 28%, 28%, 30%, 30%. 30%, the thickness of the intermediate billet is 36mm; the finish rolling is 6-stand hot continuous rolling, the reduction rate of each pass is 35%, 34%, 0, 25%, 20%, 11%, and the final rolling temperature is 847℃ , after the finish rolling, it is cooled to 605°C at a cooling rate of 17°C / s by means of sparse cooling.

[0055] After testing, the microstructure and properties of the 345MPa-grade seismic steel produced in this example are: Rel: 399MPa, Rm: 546MPa, A: 27.5%, Rel / Rm: 0.73, longitudinal impact e...

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
yield strengthaaaaaaaaaa
tensile strengthaaaaaaaaaa
yield strengthaaaaaaaaaa
Login to View More

Abstract

The invention relates to the field of metal plates and strips, in particular to a 345 MPa level vanadium-titanium micro-alloyed hot continuous rolling steel belt for an aseismic structure and a production method of the hot continuous rolling steel belt. The hot continuous rolling steel belt is prepared from following chemical components: 0.10%-0.22% of C, 0.10%-0.40% of Si, 0.40%-1.40% of Mn, 0.01-0.05% of V, 0.001%-0.035% of Ti, smaller than or equal to 0.030% of P, smaller than or equal to 0.030% of S and the balance Fe and inevitable impurities. The heating temperature of a plate blank is controlled to range from 1,200 DEG C to 1,260 DEG C, the finish rolling inlet temperature is not required, the end rolling temperature ranges from 820 DEG C to 880 DEG C, and the coiling temperature ranges from 570 DEG C to 630 DEG C. A vanadium-titanium micro-alloyed component route is adopted, the steelmaking quality is controlled, the P and S content is reduced, controlled rolling and controlled cooling capacity is fully exerted, and the 345 MPa level vanadium-titanium micro-alloyed hot continuous rolling steel belt for the aseismic structure is developed, and has the beneficial effects of the low yield ratio, high ductility, high impact toughness, good welding performance, the narrow strength fluctuation range, an obvious yield platform and other performance.

Description

technical field [0001] The invention relates to a micro-alloyed, hot-rolled steel strip and a production method thereof, in particular to a 345MPa vanadium-titanium micro-alloyed hot-rolled steel strip for an anti-seismic structure and a preparation method thereof. Background technique [0002] In recent years, due to the remarkable characteristics of industrialization, greening, standardization and recycling, steel structure buildings have been paid more and more attention by governments at all levels, and steel structure green buildings have risen to the level of national development strategies and vigorously promoted. In the context of increasing downward pressure on the national economy, serious excess steel production capacity, and extremely severe operating conditions for steel companies, the development of steel-structured green buildings has undoubtedly become an important direction for the structural transformation and capacity upgrade of the steel industry. Among 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 Patents(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/12C22C38/14C22C33/04C21D8/02
CPCC21D8/02C22C33/04C22C38/02C22C38/04C22C38/12C22C38/14
Inventor 熊雪刚张开华叶晓瑜左军刘勇黄徐晶郭韬刘富贵邱敏肖尧汪创伟崔凯禹
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