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

Continuous casting thick steel plate and production method thereof

A production method and thick steel plate technology, applied in the field of iron and steel smelting, can solve problems such as poor performance uniformity, and achieve the effects of low production cost, high production efficiency and low energy consumption

Active Publication Date: 2022-07-08
ZHANGJIAGANG HONGCHANG STEEL PLATE CO LTD +2
View PDF6 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem of poor performance uniformity of existing continuous casting thick steel plates, the object of the present invention is to provide a production method for continuous casting thick steel plates, and the thick steel plates obtained by the production method, which can be produced at high Production efficiency, low energy consumption and short process flow to improve the uniformity of properties of thick steel plates

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

[0064] This embodiment provides a kind of thick steel plate, and its production process is as follows:

[0065](1) Hot metal pre-desulfurization

[0066] 170 tons of molten iron are subjected to KR pre-desulfurization; the temperature of molten iron arriving at the station is 1400°C, the S content is 0.035%, the C content is 4.51%, the P content is 0.11%, the Si content is 0.40%, and the As content is 0.01%; 95%, S content 0.001%, temperature 1380℃;

[0067] (2) Converter smelting

[0068] Pour the molten iron from the KR station into the 180t converter with primary slag, add high-quality scrap steel according to the ratio of scrap steel: (scrap steel + molten iron) to 15:100, and then carry out dephosphorization, primary slag pouring, deep dephosphorization, and secondary Slag pouring and tapping;

[0069] Among them, P<0.02%, S<0.03%, Sn is 0.01% in high-quality scrap, and the thickness of scrap is ≥3mm;

[0070] During the dephosphorization period, the temperature of th...

Embodiment 2

[0099] This embodiment provides a kind of thick steel plate, and its production process is as follows:

[0100] (1) Hot metal pre-desulfurization

[0101] 168 tons of molten iron were subjected to KR pre-desulfurization; the temperature of molten iron arriving at the station was 1380°C, the S content was 0.030%, the C content was 4.55%, the P content was 0.105%, the Si content was 0.45%, and the As content was 0.01%; the slag removal rate of the molten iron leaving the station ≥ 95%, S content 0.001%, temperature 1350℃;

[0102] (2) Converter smelting

[0103] Pour the molten iron from the KR station into the 180t converter with primary slag, add high-quality scrap steel according to the ratio of scrap steel: (scrap steel + molten iron) to 15:100, and then carry out dephosphorization, primary slag pouring, deep dephosphorization, and secondary Slag pouring and tapping;

[0104] Among them, P<0.02%, S<0.03%, Sn is 0.01% in the high-quality scrap, and the thickness of the scr...

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
carbon equivalentaaaaaaaaaa
thicknessaaaaaaaaaa
yield strengthaaaaaaaaaa
Login to View More

Abstract

The invention discloses a continuous casting thick steel plate and a production method thereof. According to the method, the technological process of molten iron pre-desulfurization, converter smelting, LF refining, RH vacuum refining, continuous casting, casting blank heating, controlled rolling and cooling is adopted, steel smelting is conducted in a converter with primary slag according to a double-slag remaining method, the temperature of a molten pool in the dephosphorization period is 1350-1400 DEG C, the slag alkalinity of primary deslagging is 1.8-2.0, the total iron content is 12-15%, the slag alkalinity of secondary deslagging is 3.5-4.0, and the total iron content is 15-18%; carrying out controlled rolling and cooling according to the carbon equivalent; if the carbon equivalent is smaller than 0.65, a steel plate with the thickness of 50-120 mm is obtained through two-stage rolling, and then MULPIC accelerated cooling is conducted; and if the carbon equivalent is larger than or equal to 0.65, a steel plate of 50-165 mm is obtained through single-stage rolling, and then the steel plate is directly put on a cooling bed to be naturally air-cooled to the room temperature. The method improves the performance uniformity of the thick steel plate with high production efficiency and low cost.

Description

technical field [0001] The invention belongs to the technical field of iron and steel smelting, and relates to a production method of a continuous casting thick steel plate and a thick steel plate prepared by the production method. Background technique [0002] Thick steel plates are mainly used in ships, ships, marine engineering, containers, molds, energy, large buildings and other fields, and are key materials for advanced manufacturing. In recent years, with the development of technology, the demand for thick steel plates is increasing. Not only the thick steel plate is required to have high strength, high toughness, fatigue resistance, and good surface quality, but also good performance uniformity in the thickness direction of the steel plate is required. [0003] For the continuous casting steel plate, that is, the steel plate rolled from the continuous casting billet, as the thickness of the steel plate increases, the continuous casting billet is required to have a l...

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): C21C5/36C21C7/064C21C7/10C21D8/02B22D11/11C21C7/072B22D11/115C21C1/02C22C38/58C22C38/02C22C38/42C22C38/44C22C38/48C22C38/50C22C38/46C22C38/06C21C7/06
CPCC21C5/36C21C7/064C21C7/10C21D8/0226B22D11/11C21C7/072B22D11/115C21C1/02C22C38/58C22C38/02C22C38/42C22C38/44C22C38/48C22C38/50C22C38/46C22C38/06C21C7/06C21D8/0263Y02P10/20
Inventor 麻晗镇凡王耀
Owner ZHANGJIAGANG HONGCHANG STEEL PLATE 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