Steel sheet having excellent low-temperature toughness and method for producing same

A technology of low-temperature toughness and manufacturing methods, which is applied in the field of steel plates and its manufacturing, and can solve problems such as high production costs, difficult execution, and difficult guarantee of steel plate performance

Inactive Publication Date: 2020-12-01
BAOSHAN IRON & STEEL CO LTD
View PDF4 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] However, it should be pointed out that the chemical composition ratio of the steel plate obtained in this patent document is uncertain, which may easily lead to poor performance stability in mass production of the steel plate, or add excessive alloy elements to ensure performance stability, but it will inevitably cause production costs. too high
In addition, the temperature at which the finish rolling starts is controlled below the Ar3 temperature and the steel

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
  • Steel sheet having excellent low-temperature toughness and method for producing same
  • Steel sheet having excellent low-temperature toughness and method for producing same
  • Steel sheet having excellent low-temperature toughness and method for producing same

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0060]Example 1-7

[0061]The steel sheets with excellent low-temperature toughness of the above-mentioned Examples 1-7 were prepared by the following steps:

[0062](1) Smelt and cast in accordance with the chemical composition shown in Table 1.

[0063](2) Heating: heating the slab to 1000~1250℃, the heating and holding time of the casting slab is ≤1.5min / mm, the total heating and holding time is 300~450min, and the holding time in the high temperature section of 930℃~1250℃ is ≤200min.

[0064](3) Rolling: Control the blooming temperature ≥950℃, and the cumulative reduction ratio≥50%; control the finishing rolling temperature to 710℃~930℃, and the cumulative reduction ratio≥40%; and control each pass of blooming The reduction rate is ≥8%.

[0065] (4) Cooling: Cool to a final cooling temperature of 300-550°C at a cooling rate of 2-30°C / s.

[0066]Table 1 lists the mass percentage ratio of each chemical element with excellent low temperature toughness in Examples 1-7.

[0067]Table 1. (wt%, the balance...

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
Yield strengthaaaaaaaaaa
Tensile strengthaaaaaaaaaa
Impact energyaaaaaaaaaa
Login to view more

Abstract

The invention discloses a steel plate with excellent low-temperature toughness. The steel plate comprises the following chemical elements in percentage by mass: 0.02-0.15% of C; 0.10% to 0.5% of Si; 0.30% to 1.60% of Mn; 0.10% to 1.00% of Cr; 0.30% to 1.00% of Ni; 0.005% to 0.10% of Ti; 0-0.60% of Mo; 0.10% to 0.80% of Cu; 0.01% to 0.06% of Al; 0.003-0.06% of Nb, 0-0.08% of V, and 0 < N < = 0.035%; and the balance of Fe and other inevitable impurities. In addition, the invention also discloses a manufacturing method of the steel plate with excellent low-temperature toughness, which comprises the following steps: (1) smelting and casting; (2) heating; (3) rolling; and (4) cooling.

Description

technical field [0001] The invention relates to a steel plate and a manufacturing method thereof, in particular to a steel plate with excellent toughness and a manufacturing method thereof. Background technique [0002] Ships built for polar regions need to be used in low-temperature and cold seas, and the marine environment is complex and changeable, so they have to withstand many challenges brought about by ultra-low temperature, ice and snow abrasion, low-temperature wind wave collision, strong ocean storm and frozen soil collision. The design, material selection, construction and processing of low-temperature steel for ships have put forward higher requirements. Therefore, the low-temperature steel used in polar ships requires excellent comprehensive performance in extreme cold and low temperature, and its structural materials not only need to have high strength and good plasticity, but also need to have excellent impact toughness at -60°C and -80°C , especially in the ...

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): C22C38/02C22C38/04C22C38/06C22C38/44C22C38/46C22C38/48C22C38/50C21D8/02
CPCC21D8/0205C21D8/0226C21D8/0247C22C38/001C22C38/02C22C38/04C22C38/06C22C38/44C22C38/46C22C38/48C22C38/50
Inventor 张才毅高珊芦晓辉陈佳美贺达伦施青徐国栋
Owner BAOSHAN 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