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

Full-automatic submerged-arc welding solid welding wire for nickel-saving high-manganese low-temperature steel

A solid welding wire, fully automatic technology, applied in the direction of arc welding equipment, welding/welding/cutting items, welding medium, etc., can solve the problem of no elongation of weld metal, large fluctuation of strength impact toughness, high cost of welding wire, etc. problems, to achieve the effects of excellent mechanical property stability, excellent ultra-low temperature toughness, and low production cost

Inactive Publication Date: 2021-01-05
WUHAN UNIV OF SCI & TECH +1
View PDF6 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the above two technologies, the Ni content is very high, respectively 5-15% and 6-8wt%, which makes the cost of the welding wire very high
In addition, the elongation A of the weld metal prepared by the welding wire is not given in the prior patent technology (1); the elongation A of the weld metal prepared by the welding wire in the prior patent technology (2) is 31% to 35%, which is the same as The matching degree of the base metal is low, and at the same time, there are also problems of large fluctuations in strength and impact toughness at -196°C

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

[0016] A nickel-saving high manganese low temperature steel with fully automatic submerged arc welding solid core wire. The chemical composition of the fully automatic submerged arc welding solid wire is: C is 0.20wt%, Si is 0.07wt%, Mn is 31wt%, Cr is 2wt%, N is 0.02%, Mo is 0.6wt%, P ≤0.002wt%, S≤0.001wt%, the balance is Fe and unavoidable impurities.

[0017] The fully automatic submerged arc welding solid wire for nickel-saving high manganese low temperature steel prepared in this embodiment is used for welding high manganese low temperature steel plate to manufacture LNG storage tanks, the diameter of the fully automatic submerged arc welding solid wire is Φ2.4mm, Fully automatic submerged arc welding method is adopted.

[0018] The high-manganese low-temperature steel plate is a 20mm thick 25Mn ultra-low temperature steel plate. The chemical composition of the 25Mn ultra-low temperature steel plate is: C is ≤0.40wt%, Si is 0.20wt%, Mn is 25wt%, N is 0.02wt%, and P is ≤ ...

Embodiment 2

[0023] A nickel-saving high manganese low temperature steel with fully automatic submerged arc welding solid core wire. The chemical composition of the fully automatic submerged arc welding solid wire is: C is 0.35wt%, Si is 0.10wt%, Mn is 28wt%, Ni is 0.5wt%, Cr is 6wt%, N is 0.08%, P ≤0.002wt%, S≤0.001wt%, the balance is Fe and unavoidable impurities.

[0024] The fully automatic submerged arc welding solid wire for nickel-saving high manganese low temperature steel prepared in this embodiment is used for welding high manganese low temperature steel plate to manufacture LNG storage tanks, the diameter of the fully automatic submerged arc welding solid wire is Φ2.4mm, Fully automatic submerged arc welding method is adopted. The automatic submerged arc welding process adopted is the same as that in Embodiment 1.

[0025] The high-manganese low-temperature steel plate welded in this embodiment and the groove type are the same as in embodiment 1.

[0026] In this embodiment, ...

Embodiment 3

[0029] A nickel-saving high manganese low temperature steel with fully automatic submerged arc welding solid core wire. The chemical composition of the fully automatic submerged arc welding solid wire is: C is 0.45wt%, Si is 0.03wt%, Mn is 26wt%, Ni is 1.2wt%, Cr is 4wt%, N is 0.04%, Mo It is 1wt%, P≤0.002wt%, S≤0.001wt%, and the balance is Fe and unavoidable impurities.

[0030] The fully automatic submerged arc welding solid wire for nickel-saving high manganese low temperature steel prepared in this embodiment is used for welding high manganese low temperature steel plate to manufacture LNG storage tanks, the diameter of the fully automatic submerged arc welding solid wire is Φ2.4mm, Fully automatic submerged arc welding method is adopted. The automatic submerged arc welding process adopted is the same as that in Embodiment 1.

[0031]The high-manganese low-temperature steel plate welded in this embodiment and the groove type are the same as in embodiment 1.

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
Diameteraaaaaaaaaa
Tensile strengthaaaaaaaaaa
Yield strengthaaaaaaaaaa
Login to View More

Abstract

The invention relates to a full-automatic submerged-arc welding solid welding wire for nickel-saving high-manganese low-temperature steel. According to the technical scheme, the full-automatic submerged-arc welding solid welding wire is prepared from the following chemical components in percentage by weight: 0.20-0.45% of C, 0.03-0.10% of Si, 26-31% of Mn, less than or equal to 1.2% of Ni, 2-6% ofCr, less than or equal to 1% of Mo, 0.02-0.08% of N, less than or equal to 0.002% of P, less than or equal to 0.001% of S, and the balance of Fe and inevitable impurities. The production cost is low;formed weld metal has high elongation and stable mechanical properties, and the strength and low-temperature toughness of the weld metal are matched with those of the high-manganese low-temperature steel; and a welded joint has high strength and excellent ultralow-temperature toughness mechanical properties, and can meet the technical requirements on the room-temperature and low-temperature properties of LNG storage tanks prepared by welding.

Description

technical field [0001] The invention belongs to the technical field of fully automatic submerged arc welding wire. Specifically relates to a nickel-saving type high manganese low temperature steel fully automatic submerged arc welding solid core welding wire. Background technique [0002] As clean energy, liquefied petroleum gas (LPG) and liquefied natural gas (LNG) will be the main energy for life and national economic development in the future. Accordingly, the demand for steel for LPG and LNG storage and transportation containers will increase . The working temperature of LNG storage tanks is -196°C. At present, the low-temperature steel used for LNG storage tanks is mainly 9Ni steel, with a nickel content of up to 9%. Although it can meet the requirements of ultra-low temperature toughness and other mechanical properties, due to the high cost of elements, lead to an increase in steel prices. [0003] In order to save Ni resources, reduce the cost of steel materials an...

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): B23K35/30B23K9/18B23K103/04
CPCB23K9/18B23K35/0261B23K35/3073B23K2103/04
Inventor 王红鸿孟庆润万响亮黄刚
Owner WUHAN UNIV OF SCI & TECH
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