Rolling method of high-strength hot-rolled steel plate

A hot-rolled steel plate and high-strength steel technology, applied in the field of hot-rolled strip production, can solve the problems of poor metallographic structure uniformity and insufficient stability of overall mechanical properties, and achieve the effects of uniform distribution, low cost, and short production cycle

Inactive Publication Date: 2019-12-20
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At this stage, high-strength steel mainly adopts precipitation strengthening. During the heating process of hot rolling, there are microalloying element resolubility and austenite growth process. During the rolling process, there are austenite recrystallization and deformation-induced phase tr

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
  • Rolling method of high-strength hot-rolled steel plate
  • Rolling method of high-strength hot-rolled steel plate
  • Rolling method of high-strength hot-rolled steel plate

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0014] Example 1:

[0015] The P700L produced by Panzhihua Iron and Steel has a specification of 8.0mm×1360mm (thickness×width) and a continuous casting billet thickness of 230mm. The rough rolling adopts 6-pass rolling. The rough rolling cumulative deformation is 80% and the fixed width is 140mm. The first pass The roll gap is 185mm, the deformation of the final pass of rough rolling is 29%, and the cumulative deformation of finishing rolling is 86%, of which the deformation of the penultimate pass is 16% and the deformation of the last pass is 12%. Its mechanical properties are Rel: 711MPa, Rm: 772MPa, A: 23.5%, metallographic structure can be seen figure 1 , figure 1 The ferrite is white, and the pearlite is black.

Example Embodiment

[0016] Example 2:

[0017] The P750L produced by Panzhihua Iron and Steel has a specification of 6.0mm×1258mm (thickness×width), and the thickness of the continuous casting billet is 200mm. The rough rolling adopts 7-pass rolling, the rough rolling cumulative deformation is 77%, the fixed width is 42mm, the first pass The roll gap is 168mm, the deformation of the final pass of rough rolling is 32%, and the cumulative deformation of finishing rolling is 89%, of which the deformation of the penultimate pass is 16% and the deformation of the last pass is 11%. Its mechanical properties are Rel: 758MPa, Rm: 820MPa, A: 22.0%, the metallographic structure can be seen figure 2 , figure 2 The ferrite is white, and the pearlite is black.

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 rolling method of a high-strength hot-rolled steel plate, and belongs to the technical field of production of hot continuous rolling plate belts. According to the method, when the hot-rolled steel plate is produced through continuous casting, the thickness of a continuous casting blank is 200 mm-250 mm, 5-7 passes of rolling is adopted for rough rolling, the accumulateddeformation amount of rough rolling is more than or equal to 75%; when a sizing press is used, a first pass roller gap is set according to 180 mm-190 mm, and when the sizing press is not used, the first pass roller gap is set according to 160 mm-180 mm, and the deformation amount of a final pass of rough rolling is more than or equal to 28%; and 5-7 passes of rolling is adopted for finish rolling,and the accumulated deformation amount is greater than or equal to 82%, wherein the deformation amount of a reciprocal second pass is greater than or equal to 15%, the deformation amount of the finalpass is greater than or equal to 11%, and the temperature of final rolling is 840 DEG C-920 DEG C. According to the rolling method of the high-strength hot-rolled steel plate, through regulation andcontrol of the rolling process, the uniformity of structures is controlled, in particular, when the method is used for producing high-strength steel with the yield strength of 600 MPa or above and producing high-strength steel which the metallographic structure is a double-phase structure of ferrite+pearlite, the effect is especially obvious.

Description

technical field [0001] The invention relates to a rolling method of high-strength hot-rolled steel plates, belongs to the technical field of hot-rolled strip production, and is particularly suitable for the production of high-strength steels with yield strength above 600MPa. Background technique [0002] Due to the energy crisis, rising oil prices and the aggravation of the global warming effect, countries around the world have paid more attention to environmental issues caused by energy and carbon dioxide emissions, and have formulated and adopted various strict measures to control them. Under the condition of increasingly scarce energy and deteriorating environmental conditions, the development of energy-saving and low-emission vehicle technology is the only way to reduce energy consumption and environmental pollution. At present, from the perspective of international development trends, there are three main measures to solve the problem of automobile energy conservation 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
IPC IPC(8): C21D8/02
CPCC21D8/0226C21D2211/005C21D2211/009
Inventor 叶晓瑜熊雪刚王飞龙汪创伟张开华
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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