Method for rolling high-strength IF steel in ferrite area

A ferritic, high-strength technology, applied in the direction of metal rolling, metal rolling, manufacturing tools, etc., can solve the problems of damage to deep drawability, low strength, etc.

Inactive Publication Date: 2010-04-14
UNIV OF SCI & TECH BEIJING
View PDF0 Cites 17 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the strength of this kind of steel is often relatively low, while the traditional high-strength IF steel obta

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
  • Method for rolling high-strength IF steel in ferrite area
  • Method for rolling high-strength IF steel in ferrite area
  • Method for rolling high-strength IF steel in ferrite area

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0015] The method of rolling high-strength IF steel in the ferrite region of the present invention will be described in detail below in conjunction with the accompanying drawings. figure 1 It is an embodiment of the method for rolling high-strength IF steel in the ferrite zone of the present invention, figure 2 Corresponding temperature distribution curve in the production process.

[0016] As we all know, when the chemical composition of IF steel is determined, the precipitation shape, size and distribution of the second phase particles in IF steel have an important relationship with the slab heating temperature. Dissolution of the second phase particles occurs during the heating of the slab. The solid solubility of C and Ni compounds in IF steel is a function of the content of C, N, Ti, Nb, S, Al and other elements and temperature. For carbon and nitrogen compounds, such as NbC is completely dissolved at 1000°C, AlN is completely dissolved at 1250°C, and Ti(CN) is not com...

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 relates to a method for rolling a high-strength IF steel in a ferrite area. The high-strength IF steel is formed by adding solid solution strengthening alloy elements such as Mn<=1.8 %, P<=0.1 %, Cr<=0.5 %, Mo<=0.5 % of and the like into common Nb +Ti-IF steel grades so as to improve strength of the IF steel; the high-strength IF steel is produced with a heating temperature<=1150 DEG C, heating time between 0.5 hour and 1 hour and a starting rolling temperature 1100 DEG C; rough rolling is acted in an austenitic area, and screw-down rate of the rough rolling is 80%, thereby austenitic crystal particles are refined after rolled roughly; finish rolling is performed in the ferrite area, finish rolling temperature is <=780 DEG C, and then the IF steel is coiled away after laminar flow cooling is performed. The method substantially decreases oxidized steel loss produced by using the method, improves quality of strip steels, and can produce wider and thinner hot rolled plates and strips by consuming less energy.

Description

technical field [0001] The present invention relates to the rolling technology of steel plates, in particular to the method of rolling high-strength IF steel with high strength and excellent deep drawability to finally form ferrite strip steel with required final thickness. Background technique [0002] With the development of industrial technology, energy and environmental issues have become major social issues, and the automobile industry is no exception. In recent years, my country's automobile industry is developing rapidly with an annual growth rate of 10% to 15%. The changing demand of the automobile market continues to put forward requirements for the output and quality of steel materials. In particular, the requirements for weight reduction, energy saving, safety and environmental protection of automobiles make the development and application of high-strength steel plates more and more important. [0003] The strength and plasticity of steel are generally contradict...

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): B21B1/22B21B45/02B21B37/74C21D8/02
Inventor 唐荻赵爱民田冲赵征志苏岚陈银莉孙蓟泉
Owner UNIV OF SCI & TECH BEIJING
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