Low cost yield strength 700MPA level non-tempering processing high strength steel plate and manufacturing method thereof

A yield-strength, high-strength steel plate technology, applied in manufacturing tools, temperature control, manufacturing converters, etc., can solve the problems of difficult bainite structure content, difficult control of TiN precipitation, and reduced microalloying effect, so as to improve work hardening. ability, good low temperature toughness, and the effect of reducing the yield-to-tensile ratio

Active Publication Date: 2010-07-07
SHANDONG IRON & STEEL CO LTD
View PDF3 Cites 50 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the metallographic structure of the high-strength strip steel in this application is a multi-phase structure of fine bainite and a small amount of ferrite. The low finish rolling temperature has caused great dif

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 cost yield strength 700MPA level non-tempering processing high strength steel plate and manufacturing method thereof
  • Low cost yield strength 700MPA level non-tempering processing high strength steel plate and manufacturing method thereof
  • Low cost yield strength 700MPA level non-tempering processing high strength steel plate and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0024]The following specific examples are given to illustrate the present invention. It should be pointed out that the examples are only used to further illustrate the present invention, and do not represent the protection scope of the present invention. Non-essential modifications and adjustments made by others according to the present invention still belong to the protection scope of the present invention.

[0025] According to the chemical composition range set in the present invention, the following examples all pass through the following specific technological process: take chemical composition C, Si, Mn, S, P and Fe as raw materials, carry out electric furnace or converter smelting, refining process and carry out alloying to molten steel It is prepared by processes such as chemical treatment, continuous casting, direct heating or soaking of cast slab, hot continuous rolling, laminar water cooling after rolling, and coiling.

[0026] According to the experimental results,...

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

No PUM Login to view more

Abstract

The invention discloses a low cost yield strength 700MPA level non-tempering processing high strength steel plate, which is characterized by, in terms of mass, comprising 0.05-0.10% of C, 0.1-0.4% of Si, 1.5-2.0% of Mn, less than 0.015% of P, less than 0.01% of S, 0.3-0.8% of Cr, 0.09-0.15% of Ti, 0.04-0.08% of Nb, less than 0.005% of N, less than 0.002% of O, and balance of Fe and unavoidable impurities. The manufacturing method of the steel plate comprises technological steps of smelting, rough rolling, fine rolling, reeling and cooling to obtain the steel plate with yield strength of 700-780MPa, tensile strength of 800-860MPa and elongation Delta larger than or equal to 18%. The yield strength 700MPA level non-tempering processing high strength steel plate simultaneously has abrasive resistance and better low temperature toughness, toughness and crispiness transition temperature is at around negative 40 DEG C, specific energy of shock at normal temperature can reach as high as 120J.

Description

technical field [0001] The invention relates to a method for manufacturing a low-cost non-quenched and tempered high-strength steel plate with a yield strength of 700 MPa, and belongs to the technical field of hot-rolled high-strength steel plate production. Background technique [0002] At present, the 700MPa strength grade steel produced by different enterprises adopts the idea of ​​alloying, and different enterprises adopt different alloy compositions and alloy amounts. With the development of society and economy, the iron and steel industry is facing more and more pressure to save resources, save energy and protect the environment. At present, the production of 700MPa steel at home and abroad not only increases the cost of steel, but also increases the difficulty of recycling steel in the later stage due to the increase of alloy elements, especially rare elements, such as frequently added Mo. [0003] The production of 700Mpa steel at home and abroad adopts different pr...

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
IPC IPC(8): C22C38/38C21C5/28C21C7/00B21B1/22B21B37/74B21B37/16
Inventor 赵培林孙新军孙其家陈爱娇
Owner SHANDONG IRON & STEEL CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap