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

Dual-phase heterogeneous light-weight high-strength steel and preparation method thereof

A technology of high-strength steel and high-strength steel plate, which is applied in the field of dual-phase heterogeneous light-weight high-strength steel and its preparation, can solve the problem of deterioration of strength and toughness, weldability, density and rust resistance of light-weight high-strength steel for automobiles, and high cost of alloying element addition. , the preparation process is complicated and other problems, to achieve the effect of light weight, increase strong plastic product, and simple preparation process

Active Publication Date: 2022-02-25
NORTH CHINA UNIVERSITY OF SCIENCE AND TECHNOLOGY
View PDF3 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The technical problem solved by the present invention is that the cost of adding alloy elements in the light-weight high-strength steel for automobiles in the prior art is high, the preparation process is complicated, and the operation is difficult, and the added alloy elements will deteriorate the strength and toughness of the light-weight high-strength steel for automobiles , weldability, density and rust resistance, not conducive to industrial production

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
  • Dual-phase heterogeneous light-weight high-strength steel and preparation method thereof
  • Dual-phase heterogeneous light-weight high-strength steel and preparation method thereof
  • Dual-phase heterogeneous light-weight high-strength steel and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] A dual-phase heterogeneous lightweight high-strength steel, the chemical composition of which is calculated by mass percentage: C 0.14wt.%, Mn13.9wt.%, Al 6.1wt.%, Si 0.68wt.%, P≤0.01wt.% , S≤0.005wt.%, the rest is Fe and unavoidable impurities.

[0040] The preparation method of the dual-phase heterogeneous light-weight high-strength steel, the preparation method includes the following steps:

[0041] S1. Raw material selection: Weigh Fe, Mn, C, Al, Si powders with purity ≥ 99.9% according to the chemical composition ratio of the dual-phase heterogeneous light-weight high-strength steel as alloy raw materials, and put the alloy raw materials into the electric In the magnetic induction furnace, vacuum melting is carried out under the protection of argon, and then the molten steel is cast into ingots;

[0042] S2. Hot forging after homogenization treatment: homogenize the ingot described in step S1, the temperature of the homogenization treatment is 1200±30°C, and the hol...

Embodiment 2

[0049] A dual-phase heterogeneous lightweight high-strength steel, the chemical composition of which is calculated by mass percentage: C 0.22wt.%, Mn12.1wt.%, Al 7.2wt.%, Si 0.63wt.%, P≤0.01wt.% , S≤0.005wt.%, the rest is Fe and unavoidable impurities.

[0050] The preparation method of the dual-phase heterogeneous light-weight high-strength steel, the preparation method includes the following steps:

[0051] S1. Raw material selection: Weigh Fe, Mn, C, Al, Si powders with purity ≥ 99.9% according to the chemical composition ratio of the dual-phase heterogeneous light-weight high-strength steel as alloy raw materials, and put the alloy raw materials into the electric In the magnetic induction furnace, vacuum melting is carried out under the protection of argon, and then the molten steel is cast into ingots;

[0052] S2. Hot forging after homogenization treatment: homogenize the ingot described in step S1, the temperature of the homogenization treatment is 1200±30°C, and the h...

Embodiment 3

[0059] A dual-phase heterogeneous lightweight high-strength steel, the chemical composition of which is calculated by mass percentage: C 0.28wt.%, Mn10.1wt.%, Al 8.1wt.%, Si 0.55wt.%, P≤0.01wt.% , S≤0.005wt.%, the rest is Fe and unavoidable impurities.

[0060] The preparation method of the dual-phase heterogeneous light-weight high-strength steel, the preparation method includes the following steps:

[0061] S1. Raw material selection: Weigh Fe, Mn, C, Al, Si powders with purity ≥ 99.9% according to the chemical composition ratio of the dual-phase heterogeneous light-weight high-strength steel as alloy raw materials, and put the alloy raw materials into the electric In the magnetic induction furnace, vacuum melting is carried out under the protection of argon, and then the molten steel is cast into ingots;

[0062] S2. Hot forging after homogenization treatment: homogenize the ingot described in step S1, the temperature of the homogenization treatment is 1200±30°C, and the h...

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
densityaaaaaaaaaa
Login to View More

Abstract

The invention discloses dual-phase heterogeneous light-weight high-strength steel and a preparation method thereof, and belongs to the technical field of light-weight high-strength automobile steel. The steel comprises the following chemical components in percentage by weight: 0.1-0.3 wt.% of C, 10-14 wt.% of Mn, 6-8 wt.% of Al, 0.5-0.7 wt.% of Si, less than or equal to 0.01 wt.% of P, less than or equal to 0.005 wt.% of S and the balance of Fe and inevitable impurities. The as-cast structure of the dual-phase heterogeneous light-weight high-strength steel is a complex-phase structure containing coarse fishbone-shaped delta ferrite and coarse granular austenite, and the structure of the prepared finished dual-phase heterogeneous light-weight high-strength steel plate is strip-shaped delta ferrite and fine equiaxed austenite. The yield strength of a finished biphase heterogeneous light high-strength steel plate is 388-807 MPa, the tensile strength is 656-945 MPa, the ductility is 33-55%, the product of strength and elongation is 31-38 GPa%, and the density is 6.9-7.1 g / cm<3>.

Description

technical field [0001] The invention belongs to the technical field of light-weight high-strength automobile steel, and relates to a dual-phase heterogeneous light-weight high-strength steel and a preparation method thereof. Background technique [0002] In recent decades, the automobile industry has developed rapidly, and the number of automobiles is on the rise. However, the following problems such as fuel shortage and automobile environmental pollution are becoming more and more serious, and energy conservation and environmental protection have become a new direction for the development of the automobile industry. [0003] The lightweight design of the car can not only reduce the weight of the car body on the premise of ensuring the safety of the car, but also improve the fuel economy of the car and reduce carbon emissions, which is an effective way to deal with the aforementioned problems. [0004] At present, there are two main ways to achieve lightweight: one is to fu...

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): C22C38/04C22C38/06C22C38/02C21D8/02C21D1/26
CPCC22C38/04C22C38/06C22C38/02C21D8/0221C21D8/0226C21D8/0236C21D8/0247C21D1/26C21D2211/005C21D2211/001
Inventor 刘帅刘焕优王明明冯运莉钱立和张福成
Owner NORTH CHINA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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