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

Low-mismatch novel high-strength steel and preparation method thereof

A high-strength steel, a new type of technology, applied in the field of preparation of high-strength steel, can solve the problems of difficult to further exert mechanical properties and high interphase lattice mismatch, and achieve the effect of improving strong plasticity, reducing interphase mismatch, and ensuring toughness

Active Publication Date: 2020-10-02
DONGGUAN UNIV OF TECH
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] High-strength steel is a commonly used material. Existing high-strength steel mainly includes third-generation automotive steel QP steel, third-generation automotive steel Mn steel, and third-generation high-strength steel low-density steel. The performance of these high-strength steels still has certain defects, the tensile strength is below 1400MPa, the degree of interphase lattice mismatch is high, greater than 2.5%, and the width of the martensitic lath is wider than 250nm, and the membranous austenite The width is greater than 150nm, it is difficult to further develop its mechanical properties

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
  • Low-mismatch novel high-strength steel and preparation method thereof
  • Low-mismatch novel high-strength steel and preparation method thereof
  • Low-mismatch novel high-strength steel and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A novel high-strength steel with a low mismatch degree and a preparation method thereof, comprising the following steps;

[0021] 1), weigh the alloy composition, weigh 0.2wt.% of C, 3.0wt.% of Si, 5.0wt.% of Mn, 0.5wt.% of Ni according to the weight percentage of the alloy composition, and the balance is Fe;

[0022] 2), smelting, casting and forging, vacuum smelting and casting the alloy components weighed in step 1), and then forging at a temperature of 1050° C., with a forging ratio of 3.0, to obtain a forged billet with a thickness of 60 mm;

[0023] 3) Hot rolling, the 60mm thick forging billet is kept at 1200°C for 2.5h, and then hot rolled at 1100°C to 2.4mm, with a total reduction rate of 95%;

[0024] 4) heat treatment, heat the obtained hot-rolled plate at 1000°C for 15 minutes, then water quench to room temperature, then hold at 760°C for 0.5h, and air-cool to room temperature to obtain the low-mismatch degree novel high-strength steel of the present inventi...

Embodiment 2

[0028] A novel high-strength steel with a low mismatch degree and a preparation method thereof, comprising the following steps;

[0029] 1), weigh the alloy composition, weigh 0.1wt.% of C, 4.5wt.% of Si, 10.0wt.% of Mn, 0.9wt.% of Ni according to the weight percentage of the alloy composition, and the balance is Fe;

[0030] 2), smelting, casting and forging, vacuum smelting and casting the alloy components weighed in step 1), and then forging at a temperature of 1150° C., with a forging ratio of 1.5, to obtain a forged billet with a thickness of 70 mm;

[0031] 3) Hot rolling, the 70mm thick forging billet is kept at 1250°C for 2h, and then hot rolled at 1150°C, the hot rolling reaches 3mm, and the total reduction rate is 95%;

[0032] 4) heat treatment, heat the obtained hot-rolled plate at 950°C for 30 minutes, water quench it at room temperature, then hold it at 740°C for 1 hour, and air-cool to room temperature to obtain the low-mismatch high-strength steel of the presen...

Embodiment 3

[0036] A novel high-strength steel with a low mismatch degree and a preparation method thereof, comprising the following steps;

[0037] 1), weigh the alloy composition, weigh 0.4wt.% of C, 5.0wt.% of Si, 7.5wt.% of Mn, 1.5wt.% of Ni according to the weight percentage of the alloy composition, and the balance is Fe;

[0038] 2), smelting, casting and forging, vacuum smelting and casting the alloy components weighed in step 1), and then forging at a temperature of 1130° C., with a forging ratio of 2.2, to obtain a forged billet with a thickness of 100 mm;

[0039] 3) Hot rolling, the 100mm thick forging billet is kept at 1220°C for 2.2h, and then hot rolled at 1120°C to 4mm, with a total reduction rate of 95%;

[0040] 4) heat treatment, heat the obtained hot-rolled plate at 1050°C for 15 minutes, then water quench to room temperature, then hold at 840°C for 0.6h, and air-cool to room temperature to obtain the low-mismatch degree novel high-strength steel of the present inventi...

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
thicknessaaaaaaaaaa
tensile strengthaaaaaaaaaa
tensile strengthaaaaaaaaaa
Login to View More

Abstract

The invention relates to low-mismatch novel high-strength steel. Alloy components comprise, by weight percentage, 0.1-0.4 wt% of C, 3.0-6.0 wt% of Si, 5.0-10.0 wt% of Mn, 0.5-2.0 wt% of Ni and the balance Fe. The invention further relates to a preparation method of the low-mismatch novel high-strength steel. The method comprises working procedures of alloy component weighing, smelting, casting, forging, hot rolling and heat treatment. According to the low-mismatch novel high-strength steel and the preparation method thereof, the steel has an excellent mechanical property, is low in productioncost and simple in technology, and has a great application prospect.

Description

technical field [0001] The invention belongs to the technical field of metal material processing, and relates to a kind of martensite and austenite whose microstructure is nano lath structure, and uses the theory of low mismatch phase transformation to design and prepare high-strength steel. Background technique [0002] High-strength steel is a commonly used material. Existing high-strength steel mainly includes third-generation automotive steel QP steel, third-generation automotive steel Mn steel, and third-generation high-strength steel low-density steel. The performance of these high-strength steels still has certain defects, the tensile strength is below 1400MPa, the degree of interphase lattice mismatch is high, greater than 2.5%, and the width of the martensitic lath is wider than 250nm, and the membranous austenite If the width is greater than 150nm, it is difficult to further develop its mechanical properties. Contents of the invention [0003] The object of the ...

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): C22C38/02C22C38/04C22C38/08C21D8/02C21D1/18
CPCC21D1/18C21D8/0221C21D8/0226C21D8/0263C21D2211/001C21D2211/008C22C38/02C22C38/04C22C38/08
Inventor 宋成浩孙振忠王皓亮
Owner DONGGUAN UNIV OF TECH
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