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

Highly-reamed hot-rolled pickling steel plate with 440 MPa grade tensile strength

A tensile strength, hot-rolled pickling technology, applied in the field of hot-rolled and pickled steel sheets, can solve the problems of low hole reaming and flanging processability, and achieve excellent hole reaming and flanging forming processability, high strength, and reduced manufacturing. cost effect

Active Publication Date: 2019-03-19
SHANGHAI MEISHAN IRON & STEEL CO LTD
View PDF6 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The object of the present invention is to provide a high-reaming hot-rolled pickled steel plate with a tensile strength of 440MPa and its manufacturing method, which mainly solves the hole-enlarging and flanging processing of the existing high-reaming hot-rolled pickled steel plate with a tensile strength of 440MPa Technical issues with poor 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
  • Highly-reamed hot-rolled pickling steel plate with 440 MPa grade tensile strength
  • Highly-reamed hot-rolled pickling steel plate with 440 MPa grade tensile strength
  • Highly-reamed hot-rolled pickling steel plate with 440 MPa grade tensile strength

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0037] The present invention will be further described below in conjunction with Examples 1 to 4, as shown in Tables 1 to 4.

[0038] Table 1 shows the chemical composition (in weight percentage) of the steel in the example of the present invention, and the balance is Fe and unavoidable impurities.

[0039] Table 1 Chemical composition of the steel in the example of the present invention, unit: weight percentage.

[0040] element

C

Si

Mn

P

S

Al

this invention

0.035-0.055

0.40-0.60

0.95-1.05

≤0.015

≤0.005

0.020-0.060

Example 1

0.0423

0.446

1.032

0.0105

0.0013

0.0416

Example 2

0.0367

0.416

1.000

0.0103

0.0014

0.0285

Example 3

0.0512

0.508

1.003

0.0105

0.0020

0.0377

Example 4

0.0478

0.573

0.988

0.0126

0.0025

0.0510

[0041] The molten steel that meets the chemical composition requirements is obtained through converter smelting, and the molten steel is blown with Ar in the refining process of the LF ladle refining furnace, and the RH furnace is subjected to vacuum cycle degassing treatment and composition...

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
yield strengthaaaaaaaaaa
tensile strengthaaaaaaaaaa
Login to View More

Abstract

The invention relates to a highly-reamed hot-rolled pickling steel plate with 440 MPa grade tensile strength. The technical problem of low reaming and flanging machining performance of an existing highly-reamed hot-rolled pickling steel plate with the 440 MPa grade tensile strength is mainly solved. The highly-reamed hot-rolled pickling steel plate with the 440 MPa grade tensile strength is prepared from the following chemical compositions in percentage by weight: 0.035%-0.055% of C, 0.40%-0.60% of Si, 0.95%-1.05% of Mn, no more than 0.015% of P, no more than 0.005% of S, 0.020%-0.0. 60% of Aland the balance of iron and inevitable impurities. The after-fracture elongation rate A50 mm of the hot-rolled pickling steel plate with the thickness being 1.8-6.0 mm is no less than 30%, and the reaming performance lambda is no less than 120%. The highly-reamed hot-rolled pickling steel plate has good reaming and flanging forming characteristics, and manufacturing of highly-reamed and complexly-formed automobile structural parts with the high flanging amount is met.

Description

Technical field [0001] The invention relates to a hot-rolled pickled steel sheet, in particular to a high-expanded hot-rolled pickled steel sheet with a tensile strength of 440MPa and a manufacturing method thereof. The steel plate of the present invention has good hole reaming and flanging forming characteristics, and meets the requirements of automobile parts The manufacturing requirements of, belong to the field of iron-based alloy technology. Background technique [0002] Hot-rolled steel sheets and hot-rolled pickled steel sheets are widely used in automobile chassis, wheels and body structure parts. With the rapid development of the automobile industry, the automobile industry has higher and higher requirements for lightweight, safety and cost reduction; therefore, in automobile design At the same time, the requirements for chassis structure (control arm, rear axle beam assembly, etc.) are increasing, the shape of its parts is becoming more and more complex, and the strengt...

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): C22C38/02C22C38/04C22C38/06C22C33/04C21D8/02
CPCC21D8/0205C21D8/0226C21D8/0263C21D2211/002C21D2211/005C22C33/04C22C38/02C22C38/04C22C38/06
Inventor 王进
Owner SHANGHAI MEISHAN 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