Eureka AIR delivers breakthrough ideas for toughest innovation challenges, trusted by R&D personnel around the world.

E550-W100 ultrahigh-strength ship plate steel and manufacturing method thereof

A technology of E550-W100 and manufacturing method, which is applied in the direction of manufacturing tools, metal rolling, furnace types, etc., can solve the problems of deterioration of low-temperature toughness, decline of mechanical properties of welded joints, and lower than other problems, so as to achieve stable production process, improve toughness, cost reduction effect

Inactive Publication Date: 2021-02-05
NANJING IRON & STEEL CO LTD
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] When the welding heat input is greater than 50kJ / cm, it is high-energy welding. When the welding heat input of traditional steel plates is greater than 50kJ / cm, the mechanical properties of the welded joint will be seriously reduced due to the excessive coarsening of the heat-affected zone. It is lower than the standard requirements of the base metal steel plate, and research and development of steel for high-energy-input welding is an effective way to solve the deterioration of low-temperature toughness in the heat-affected zone of high-energy-input welding

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
  • E550-W100 ultrahigh-strength ship plate steel and manufacturing method thereof
  • E550-W100 ultrahigh-strength ship plate steel and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0026] A kind of E550-W100 ultra-high-strength ship plate steel and its manufacturing method provided in the following examples, the steel plate thickness is 50mm, the chemical composition is shown in Table 1, the rolling cooling process parameters are shown in Table 2, and the product performance is shown in Table 3:

[0027] The main chemical composition (wt%) of the embodiment of table 1

[0028]

[0029] The rolling cooling process parameter of table 2 embodiment

[0030] Example Thickness mm Rough rolling finish temperature ℃ Finish rolling start temperature ℃ Return to red temperature ℃ 1 50 1070 826 400 2 50 1053 818 350 3 50 1078 837 450

[0031] Table 3 embodiment product performance

[0032]

[0033] It can be seen that the steel plate obtained by the present invention has good comprehensive mechanical properties, yield strength ≥ 550MPa, tensile strength ≥ 670MPa, suitable for high-strength ship plate steel with weld...

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 discloses E550-W100 ultrahigh-strength ship plate steel. The E550-W100 ultrahigh-strength ship plate steel comprises the following chemical components in percentage by mass: 0.04%-0.12%of C, 0.15%-0.35% of Si, 1.50%-1.70% of Mn, less than or equal to 0.020% of P, less than or equal to 0.0030% of S, 0.030%-0.060% of V, 0.010%-0.030% of Nb, 0.030%-0.080% of Alt, 0.005%-0.030% of Ti, 0.0005%-0.0040% of Ca and less than or equal to 0.0060% of N, wherein (Alt.N) / Ti is controlled to be 0.010 to 0.030. The yield strength of an obtained steel plate is larger than or equal to 550 MPa, the tensile strength of the steel plate is larger than or equal to 670 MPa, the steel plate is suitable for high-strength ship plate steel with the welding line energy within the range of 100 kJ / cm, andthe average impact energy of the HAZ of the steel plate at the temperature of -40 DEG C is 55 J or above.

Description

technical field [0001] The invention relates to the technical field of iron and steel production, in particular to an E550-W100 ultra-high-strength ship plate steel and a manufacturing method thereof. Background technique [0002] Steels for high heat input welding are widely used. For example, in the shipbuilding industry, the shipbuilding efficiency of ordinary ship plates is only a quarter of that of high heat input welding ship plates. When the country cannot produce it, it can only be imported from abroad, but the price is expensive. The high heat input welding method is the most practical way to improve the efficiency of welding construction and reduce costs. Steel for high heat input welding is one of the key development goals of my country's iron and steel industry and has broad market prospects. [0003] When the welding heat input is greater than 50kJ / cm, it is high-energy welding. When the welding heat input of traditional steel plates is greater than 50kJ / cm, th...

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): C22C38/02C22C38/04C22C38/06C22C38/12C22C38/14C21C7/06C21D6/00C21D8/02C21D9/00C22C33/04B21B1/22
CPCB21B1/22B21B2001/225B21B2261/20C21C7/06C21D6/005C21D6/008C21D8/0221C21D9/0081C21D2211/001C21D2211/002C21D2211/005C22C33/04C22C38/001C22C38/002C22C38/02C22C38/04C22C38/06C22C38/12C22C38/14
Inventor 赵晋斌李恒坤陈林恒伯飞虎车马俊张晓雪邱保文黄建华
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
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