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

Hidden arc welding used smelting solder

A technology for smelting flux and submerged arc welding, which is applied in the field of smelting flux for submerged arc welding, can solve problems such as non-horizontal fillet welding and flat welding application research, pitting, high-temperature cracks, etc., and achieve good welding slag peeling, welding slag Good peelability and high temperature crack resistance, good effect of welding slag peelability

Active Publication Date: 2009-01-21
KOBE STEEL LTD
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The flux described in JP-A-61-202794 is particularly suitable for welding of narrow grooves, and it is also suitable for 35° grooves compared to the general groove angle of 45°. However, only the welding current of 450 to 500A range
In addition, the flux described in JP-A-56-92000 has not been studied for application to horizontal fillet welding and flat welding.
Therefore, when the flux described in JP-A No. 61-202794 is used for horizontal welding with a welding current of 550 A, high-temperature cracks may occur
In addition, when the flux described in JP-A-56-92000 is applied to horizontal fillet welding and flat welding, pockmarks and undercuts may occur.

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
  • Hidden arc welding used smelting solder
  • Hidden arc welding used smelting solder
  • Hidden arc welding used smelting solder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0027] Hereinafter, such a flux according to an embodiment of the present invention will be specifically described. The flux of this embodiment is a melting flux used for submerged arc welding. Hereinafter, the reason for numerical limitation regarding the component composition of the flux of this embodiment is demonstrated.

[0028] SiO 2 : 10 to 40% by mass

[0029] SiO in flux 2 Acts as a slag forming agent to increase the viscosity of molten slag. In addition, there is an effect of improving the retention force of the bead during lateral welding and stabilizing the shape of the bead. However, when SiO 2 When the content is less than 10% by mass, the viscosity of the molten slag is insufficient, the bead shape becomes unstable, and weld flash and undercut occur. On the other hand, if SiO 2 When the content exceeds 40% by mass, the viscosity of the molten slag becomes too high, the detachability of the slag decreases, and pitting and inclusion of slag occur. Th...

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
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

The invention discloses a smelting flux of hidden arc welding, which comprises the following parts: 10-40 wt% SiO2, 10-27 wt% CaO, 5-35 wt% CaF2, 3-20 wt% MgO, 9-35 wt% Al2O3 and 1.5-20 wt% MgO. [A]=[CaO] / ([SiO2]+[Al2O3] / 2), wherein [A] is between 0.3 and 0.7, which is fit for high-strength current transverse welding.

Description

technical field [0001] The present invention relates to a fused flux for submerged arc welding used when submerged arc welding is performed in welding postures such as horizontal welding, horizontal fillet welding, and flat welding. Melting flux for submerged arc welding used for cylindrical large barrels and tanks. Background technique [0002] Recently, due to the expansion of petroleum consumption, the size of petroleum storage tanks has been promoted, and accordingly, the steel plates used for petroleum storage tanks also tend to be thickened. For this reason, welding man-hours at the time of tank construction increase, and it is required to increase the efficiency of welding work. [0003] However, in order to improve the efficiency of welding construction, when using a welding method with a narrow groove angle such as transverse submerged arc welding for high-current welding, high-temperature cracks are prone to occur in the welded part, because adjustments will be re...

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): B23K35/362
Inventor 福田和博佐藤统宣
Owner KOBE STEEL LTD
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