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

Single-ferrite-precipitated steel plate with high strength and high pore-expansion property and preparation method for same

A high hole expandability, ferrite technology, applied in the field of steel manufacturing, can solve the problems of low polygonal ferrite structure strength, reduced hole expandability, etc., to improve hole expandability and elongation, improve product strength, improve Effect of hole expansion performance and elongation

Inactive Publication Date: 2019-07-02
ANGANG STEEL CO LTD
View PDF8 Cites 11 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The polygonal ferrite structure of the present invention has low strength, and the diffusely distributed bainite structure and martensite structure will reduce its hole expansion performance

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
  • Single-ferrite-precipitated steel plate with high strength and high pore-expansion property and preparation method for same
  • Single-ferrite-precipitated steel plate with high strength and high pore-expansion property and preparation method for same
  • Single-ferrite-precipitated steel plate with high strength and high pore-expansion property and preparation method for same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0038] The following examples are used to specifically illustrate the contents of the present invention, and these examples are only general descriptions of the contents of the present invention, and do not limit the contents of the present invention.

[0039] Table 1 is the mass percentage of each chemical element in the steel of the example; Table 2 is the manufacturing process parameters of the steel plate of the example; Table 3 is the microstructure and mechanical properties of the steel plate of the example.

[0040] The mass percentage composition (wt%) of each chemical element in the steel of table 1 embodiment

[0041] Example C Si mn P S Cr Mo Nb Ti Ca Mg V N als 1 0.05 0.22 2.10 0.014 0.0055 0.28 0.1 0.03 0.05 0.0019 0.0019 0.13 0.0033 0.042 2 0.08 0.61 1.80 0.011 0.0058 0.22 0.05 0.02 0.08 0.0032 0.0032 0.0029 0.042 3 0.10 0.25 2.15 0.012 0.0042 0.3 0.05 0.10 0.0021 0.0021 0.0017...

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
tensile strengthaaaaaaaaaa
tensile strengthaaaaaaaaaa
Login to View More

Abstract

The invention discloses a single-ferrite-precipitated steel plate with high strength and a high pore-expansion property and a preparation method for the same. Steel comprises 0.05%-0.12% of C, 0.1%-0.7% of Si, 0.8%-2.2% of Mn, 0.05%-0.10% of Ti, less than 0.035% of P, less than 0.035% of S, 0.015%-0.060% of Als, 0.0015%-0.0050% of Ca, less than 0.0050% of Mg and less than 0.005% of N, at least oneof ingredients including 0.15%-0.3% of Cr and 0.05%-0.3% of Mo, at least one of ingredients including 0.02%-0.06% of Nb and 0.05%-0.25% of V as well as the balance being Fe and inevitable impurities.The linear speed of Si-Ca feeding is more than or equal to 3.5m / s, and a superheat degree of the molten steel is less than or equal to 30 DEG C; and the heating temperature of a casting blank is 1150-1250 DEG C, the multi-pass rolling total reduction rate is more than or equal to 80%, the final rolling temperature of hot rolling is 850-950 DEG C, the after-rolling cooling rate is 15-45 DEG C / s, and the rolling temperature is 550-650 DEG C. The finished steel plate has the good pore-expansion property.

Description

technical field [0001] The invention belongs to the technical field of steel production, and in particular relates to a method for producing ferrite-precipitated steel with good hole expansion performance by adopting controlled rolling and controlled cooling. Background technique [0002] The modern automobile manufacturing industry is committed to improving the safety and crash performance of automobiles, reducing fuel consumption, thereby improving passenger safety and reducing the impact on the environment. The research and development and application of high-strength automotive steel is an effective means to realize the lightweight of automobiles. It is in line with the development trend of energy saving, consumption reduction, environmental protection and safety of the new generation of automobiles, and is the leading direction of future material technology development. However, with the increasing requirements of automobile design, the shape of parts is more complex, a...

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): C22C38/02C22C38/04C22C38/06C22C38/38C22C38/28C22C38/22C22C38/26C22C38/24C22C38/14C22C38/12C21D8/02
CPCC21D8/0226C21D2211/005C22C38/001C22C38/002C22C38/02C22C38/04C22C38/06C22C38/12C22C38/14C22C38/22C22C38/24C22C38/26C22C38/28C22C38/38
Inventor 张宇时晓光董毅韩斌孙成钱刘仁东郝志强丁燕勇孟凡志
Owner ANGANG 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