Thick plate for high-strength container with excellent core toughness and manufacturing method thereof

A high-strength, core technology, applied in the direction of manufacturing tools, furnaces, heat treatment equipment, etc.

Active Publication Date: 2021-11-19
NANJING IRON & STEEL CO LTD
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] To sum up, steel plates with a thickness > 50mm in the prior art, which can meet the service temperature of -70°C and have a yield strength ≥ 420MPa and a tensile strength ≥ 560MPa, have not been reported yet.

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
  • Thick plate for high-strength container with excellent core toughness and manufacturing method thereof
  • Thick plate for high-strength container with excellent core toughness and manufacturing method thereof
  • Thick plate for high-strength container with excellent core toughness and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0032] The following examples provide a thick plate for high-strength containers with excellent core toughness and its manufacturing method. The chemical composition is shown in Table 1, the smelting and rolling process parameters are shown in Table 2, and the heat treatment process parameters are shown in Table 3. The specific steps are as follows: steelmaking and continuous casting: pretreatment of molten iron, S content in molten iron < 0.002wt%, converter steelmaking, deep deoxidation and desulfurization in LF furnace, adjustment of alloy composition to the target range, degassing in RH furnace, vacuum The temperature is less than or equal to 0.3 torr; the continuous casting is carried out with the weak cooling of the secondary cooling water and the low casting speed scheme, the casting speed is 0.8-1.2m / min, the thickness of the continuous casting slab is 260mm, and the casting slab is subjected to stack cooling treatment, and the stack cooling time is ≥48 hours;

[0033] ...

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 discloses a thick plate for high-strength containers with excellent core toughness and a manufacturing method, and relates to the technical field of iron and steel production. Its chemical composition and mass percentage are as follows: C: 0.08%-0.12%, Si: 0.10%-0.30 %, Mn:1.10%~1.50%, Ni:0.50%~0.80%, Mo:0.08%~0.15%, V:0.03%~0.06%, P≤0.006%, S≤0.002%, the balance is Fe and not Avoid impurities. The maximum thickness is 80mm, which meets the requirements of high-strength low-temperature container plates used under the condition of ‑70 °C, 1 / 4 thick and core ‑70 °C KV 2 Value ≥ 150J, yield strength ≥ 420MPa, tensile strength ≥ 560MPa, can be used to build large cryogenic spherical tanks or storage tanks.

Description

technical field [0001] The invention relates to the technical field of steel production, in particular to a thick plate for high-strength containers with excellent core toughness and a manufacturing method. Background technique [0002] With the development of large-volume chemical low-temperature spherical tanks and other equipment, the requirements for the thickness of steel plates for low-temperature containers are also gradually increasing. When building large-scale low-temperature vinyl spherical tanks, in order to improve the uniformity of steel plate thickness in the direction of performance to ensure equipment safety, a large thickness is generally required The impact performance of the steel plate core must also meet the technical index requirements. As the thickness of the plate increases, the rolling compression ratio decreases when the same thickness of the billet is used. It is difficult to ensure the impact performance of the core after normalizing + tempering,...

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): C22C38/02C22C38/04C22C38/08C22C38/12C21D1/18C21D6/00C21D8/02C21D9/00C22C33/04
CPCC22C38/02C22C38/04C22C38/08C22C38/12C22C38/002C22C33/04C21D1/18C21D6/005C21D6/008C21D6/001C21D8/0221C21D9/0081C21D2211/009
Inventor 谢章龙吴俊平席连云方磊李庆春
Owner NANJING 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