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

Ferrite low-density high-strength steel and manufacturing method thereof

A manufacturing method and low-density technology, applied in the field of high-strength steel, can solve problems such as surface decarburization, lower manufacturability of steel types, lower steel plate strength and plasticity, etc., to reduce production costs, improve manufacturability, and good mechanical stability sexual effect

Active Publication Date: 2015-09-23
BAOSHAN IRON & STEEL CO LTD
View PDF6 Cites 77 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the content of alloying elements is too high, the manufacturability of the steel grade is significantly reduced; moreover, the addition of excessive Al will inhibit the occurrence of the transformation-induced plasticity strengthening and toughening mechanism of ferritic steel, and will instead reduce the strength of the steel plate and plasticity
In addition, when the C content in the steel is too high, the surface layer of the steel plate will be severely decarburized during the hot working process.

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
  • Ferrite low-density high-strength steel and manufacturing method thereof
  • Ferrite low-density high-strength steel and manufacturing method thereof
  • Ferrite low-density high-strength steel and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0097] The present invention will be further described below in conjunction with the embodiments and accompanying drawings.

[0098] Table 1 is the composition of the steel grades of the embodiments of the present invention and comparative examples, Table 2 is the manufacturing process of the steel grades of the embodiments of the present invention and comparative examples, and Table 3 is the retained austenite in the microstructure of the steel plates of the embodiments of the present invention and comparative examples The volume fraction and the mechanical properties of the steel plate.

[0099] Steel materials having the composition shown in Table 1 were smelted and cast to produce slabs. The slab is heated at a heating temperature of 1200°C, and the slab is hot-rolled after a holding time of 1.5 hours. The hot-rolling finish rolling is completed at a final rolling temperature above 860°C. The thickness of the hot-rolled steel plate is about 3.2mm. The hot-rolled steel pla...

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
tensile strengthaaaaaaaaaa
thicknessaaaaaaaaaa
strengthaaaaaaaaaa
Login to View More

Abstract

A ferrite low-density high-strength steel and manufacturing method thereof. The ferrite low-density high-strength steel chemical comprises the following chemical components composition by mass percentage: 0.05-0.40% of C, 4.0-12.0% of Mn, 3.0-7.0% of Al, no more than 0.02% of P, no more than 0.01% of S, no more than 0.01% of N, and the balance of Fe and inevitable impurity elements. The above elements satisfy the following relationship: 1.0<Mn / Al, 3.5 <1.5Mn / Al+10C, and Mn / Al + 10C <5.2 The manufacturing method comprises hot rolling, annealing, pickling, cold rolling and annealing to prepare the low-density high-strength steel plate. In addition to ferrite, the microstructure of the steel plate also contains 6-40% of residual austenite. The low-density high-strength steel plate has tensile strength no less than 800MPa, elongation no less than 25%, and density less than 7500kg / m<3>.

Description

technical field [0001] The invention relates to high-strength steel, in particular to a ferrite low-density high-strength steel and a manufacturing method thereof. Background technique [0002] The application of high-strength steel and advanced high-strength steel to replace traditional low-strength grade steel can increase the specific strength (ratio of strength to density) of automotive steel and reduce the thickness of structural parts to achieve lightweight automotive structures. Another effective way to increase the specific strength of automotive steel is to reduce the density of the steel on the basis of maintaining the excellent mechanical properties of the above-mentioned high-strength steel. Therefore, the current development of low-density, high-strength and toughness steel plates is just to meet the urgent need to further realize the lightweight of automobiles. [0003] The mechanical properties of high-strength steel are determined by its chemical composition...

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): C22C38/06C22C38/08C22C38/12C22C38/14C22C38/16C22C38/38C22C38/58C21D8/02
Inventor 杨旗王利
Owner BAOSHAN IRON & STEEL CO LTD
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