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

Method for producing low-carbon thin pickling steel with yield ratio less than or equal to 0.8 through CSP (cast steel plate) process

A yield-strength ratio and carbon thin acid technology, which is applied in the field of low-carbon thin pickling steel with yield-strength ratio ≤ 0.8 by CSP process, can solve the problems of incapability of production, little reference value, and increased alloy cost.

Inactive Publication Date: 2015-01-07
武汉钢铁有限公司
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method increases the cost of the alloy. At the same time, for the CSP production line of Wuhan Iron and Steel, due to the influence of the continuous casting funnel-shaped mold, it cannot produce strip steel with a C content of 0.06-0.17%. At the same time, the upper limit of C for low-carbonated steel is 0.12%. Therefore, this The method has little reference significance for the production of low-carbonated washed steel with high formability requirements on the CSP production line

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The composition of the steel grade is: C: 0.03%, Mn: 0.45%, Si: 0.13%, and the rest are impurities such as Fe, P, S, etc. The thickness of the steel plate is 1.5mm, and the temperature set for the final rolling is 870°C.

[0019] its steps

[0020] 1) Smelting molten steel with the final composition and weight percentage content and continuously casting it into billets;

[0021] 2) Rolling is carried out at a casting billet temperature of 1155-1165°C, the final rolling temperature is increased by 10°C on the basis of the set final rolling temperature, the final rolling temperature is 880°C, and rolled to a steel plate thickness of 1.5mm;

[0022] 3) Laminar cooling: use weak water cooling in the front section, and cool to 780-790°C; maintain 780-790°C in the air-cooling section; cool to the coiling temperature at the cooling speed of 105°C / S in the final cooling section;

[0023] 4) Carry out coiling, and control the coiling temperature at 610-620°C.

[0024] After te...

Embodiment 2

[0026] The composition of the steel grade is: C: 0.042%, Mn: 0.3%, Si: 0.17%, and the rest are impurities such as Fe, P, S, etc. The thickness of the steel plate is 1.4mm, and the temperature set for the final rolling is 860°C.

[0027] its steps

[0028] 1) Smelting molten steel with the final composition and weight percentage of: and continuous casting into billets;

[0029] 2) Rolling is carried out at a casting billet temperature of 1160-1170°C, and the final rolling temperature is increased by 20°C on the basis of the set final rolling temperature, the final rolling temperature is 880°C, and rolled to a steel plate thickness of 1.4mm;

[0030] 3) Laminar cooling: water cooling in the front section, and cooling to 790-800°C; maintaining 790-800°C in the air-cooling section; cooling to the coiling temperature at a cooling rate of 120°C / S in the final cooling section;

[0031] 4) Carry out coiling, and control the coiling temperature at 615-620°C.

[0032] After testing, t...

Embodiment 3

[0034] The steel composition is: C: 0.053%, Mn: 0.41%, Si: 0.2%, and the rest are impurities such as Fe, P, S, etc. The thickness of the steel plate is 1.2mm, and the temperature set for the final rolling is 850°C.

[0035] its steps

[0036] 1) Smelting molten steel with the final composition and weight percentage of: and continuous casting into billets;

[0037] 2) Rolling is carried out at the temperature of the slab at 1170-1180°C, the final rolling temperature is increased by 20°C on the basis of the set final rolling temperature, the final rolling temperature is 870°C, and the thickness of the steel plate is rolled to 1.2mm;

[0038] 3) Laminar cooling: the front section adopts water cooling and cools to 810-820°C; maintains 810-820°C in the air-cooling section; cools to the coiling temperature at the cooling speed of 140°C / S in the final cooling section;

[0039] 4) Carry out coiling, and control the coiling temperature at 620-630°C.

[0040] After testing, the yield ...

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
thicknessaaaaaaaaaa
yield strengthaaaaaaaaaa
tensile strengthaaaaaaaaaa
Login to View More

Abstract

The invention relates to a method for producing a low-carbon thin pickling steel with a yield ratio less than or equal to 0.8 through a CSP (cast steel plate) process. The method comprises the steps of smelting and continuously casting to form a blank; rolling the cast blank at temperature of 1150-1180 DEG C, and controlling the final rolling temperature to be 10-20 DEG C above the set temperature; cooling with laminar flow; cooling the front section with water to 780-820 DEG C; maintaining the air-cooled section at 780-820 DEG C; cooling the rear section at a cooling speed of 100-140 DEG C per second; and coiling. On the premises that components of the existing low-carbon pickling steel are not changed and the tensile strength is not reduced, the yield strength of the low-carbon pickling steel is reduced through adjusting the laminar cooling mode, the laminar cooling speed, the final rolling temperature and the coiling temperature, the yield ratio is reduced, and a thin low-carbon pickling steel plate meeting use requirements of customers with high requirements for the molding performance is provided.

Description

technical field [0001] The invention relates to pickling steel and a production method thereof, in particular to a method for producing low-carbon thin pickling steel with a yield ratio ≤ 0.8 by using a CSP process. Background technique [0002] CSP has been widely used in the world due to its advantages of low operating cost, fine product grains, high strength, high shape and dimensional accuracy. However, due to the characteristics of the process and equipment of the CSP production line, the low-carbon steel (C≤0.07%) has a high yield ratio (yield strength / tensile strength). It cannot meet the requirements of users, and the yield strength ratio fluctuates greatly, with an average of 0.82, which seriously affects the cold forming performance of the product, especially in the field of automotive structural steel and other fields with high requirements for matching strength and forming performance. Although the traditional production process can produce low-carbonated steel ...

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 Patents(China)
IPC IPC(8): C22C38/04C21D8/02
Inventor 谭佳梅张永锟何金平汪水泽刘义滔张帆钱龙李国全
Owner 武汉钢铁有限公司
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