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

Pipeline steel submerged-arc welding wire for acid service environment

A service environment, pipeline steel technology, applied in welding media, welding equipment, welding/cutting media/materials, etc., can solve the problems of softening area and less alloying elements in the heat-affected zone, and increase the ability of acid corrosion resistance , good acid corrosion resistance, improved resistance to hydrogen-induced cracking

Active Publication Date: 2015-12-16
BC P INC CHINA NAT PETROLEUM CORP +1
View PDF9 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the low content of alloying elements, softening areas tend to appear in the heat-affected zone near the weld after welding with this patent

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
  • Pipeline steel submerged-arc welding wire for acid service environment
  • Pipeline steel submerged-arc welding wire for acid service environment
  • Pipeline steel submerged-arc welding wire for acid service environment

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment

[0040] According to the scope of the chemical composition of the present invention, electric furnaces are used to smelt 3 furnaces of welding wire steel, and after smelting, a Φ4mm welding wire is made by drawing and plating copper.

[0041] The chemical composition of the fabricated welding wire and the calculated carbon equivalent and P cm The values ​​are shown in Table 1.

[0042] Table 1 Chemical composition of test submerged arc welding wire

[0043] serial number

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
Tensile strengthaaaaaaaaaa
Vickers hardness valueaaaaaaaaaa
Thicknessaaaaaaaaaa
Login to View More

Abstract

The invention discloses a pipeline steel submerged-arc welding wire for an acid service environment and an application of the pipeline steel submerged-arc welding wire, and belongs to the technical field of welding materials. The pipeline steel submerged-arc welding wire is made by smelting the following chemical compositions by mass percentage: 0.030%-0.060% of C, 0.50%-1.20% of Mn, less than or equal to 0.010% of P, less than or equal to 0.005% of S, 0.05%-0.30% of Si, 0.20%-0.50% of Cu, 0.30%-0.70% of Cr, 0.065%-0.10% of Nb, 0.10%-0.16% of Ti, less than or equal to 0.2% of Ni, 0.001%-0.003% of Mo, 0.006%-0.010% of B, and the balance of Fe. The tensile strength of the submerged-arc welding wire disclosed by the invention is 540 MPa to 600 MPa, the Vickers hardness value is less than or equal to 220 HV10, the Charpy impact toughness value of a welding line at -20 DEG C is greater than or equal to 90 J, and welding metal has good resistance to acid corrosion while having strength and toughness matched with parent metal.

Description

technical field [0001] The invention belongs to the technical field of welding materials, and relates to a submerged arc welding wire, in particular to a pipeline steel submerged arc welding wire for acid service environment. Background technique [0002] In order to meet the future oil and gas demand worldwide, the number of sour oil and gas wells has been developed greatly in recent years. The transported oil and gas have been purified before entering the long-distance pipeline, but if the oil and gas entering the pipeline cannot meet the requirements of drying and purification, the corrosion of the pipeline in the acidic environment is still inevitable. Therefore, the demand for pipeline steel used in acid service conditions for long-distance pipelines is increasing day by day. Submerged arc welding is the main process for manufacturing welded pipes, and it is also the most efficient welding method. [0003] Generally speaking, as the strength level increases, the proba...

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): B23K35/30
CPCB23K35/3073
Inventor 胡美娟李炎华王海涛王鹏杨放池强
Owner BC P INC CHINA NAT PETROLEUM CORP
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