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

Flux cored wire

A technology of flux-cored welding wire and welding wire, which is applied in the direction of welding medium, welding equipment, welding/cutting medium/material, etc. It can solve the problems of poor weld bead shape, poor welding workability, high-temperature cracks in the first layer of welding, etc., and achieve excellent quality, Excellent mechanical properties and high temperature crack resistance

Inactive Publication Date: 2014-12-03
KOBE STEEL LTD
View PDF9 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the welding wire described in Patent Document 1 does not contain Ti and also has a small Mn content. Therefore, there is a problem of high-temperature cracking in the first layer of welding in single-face butt joint welding of steel plates.
In addition, since the welding wire does not contain Al 2 o 3 , so there is a problem that the bead shape of the horizontal fillet weld is poor, or the bead sags in the vertical upward welding, and the welding workability in the full posture welding is poor.
In addition, since the amount of Mn and B in the welding wire is small, there is a problem that the mechanical properties (toughness) of the weld metal are poor

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
  • Flux cored wire
  • Flux cored wire
  • Flux cored wire

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0060] The flux-cored welding wire of the present invention will be specifically described by comparing Examples satisfying the requirements of the present invention and Comparative Examples not satisfying the requirements of the present invention.

[0061] In the steel sheath (the steel used contains C: 0.03% by mass, Si: 0.02% by mass, Mn: 0.25% by mass, P: 0.010% by mass, S: 0.007% by mass, and the balance is Fe and unavoidable impurities) Flux is filled in the middle, and the welding wire diameter 1.2mm is made of the welding wire composition shown in Table 1 and 2. figure 1 Welding wire 1 shown in (b) (Example: No. 1-25, Comparative example: No. 26-49).

[0062] In addition, the welding wire component was measured and calculated by the following measuring method.

[0063] The amount of C is measured by the "infrared absorption method". The amount of Si, the amount of Mn, the amount of B, the amount of Mg, and the amount of rare earth compounds (amount of rare earth elem...

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 present invention provides a flux cored wire, having excellent properties of high temp resistance and crack resistance as well as welding operation and excellent mechanical properties of welding metal. The flux-cored wire is filled with welding flux inside a steel jacketing, wherein a filling rate of the welding flux is 10-25% by weight relative to the total weight of the wire, and the welding flux contains the following components by weight, relative to the total weight of the wire, C: 0.03-0.08%, Si: 0.01-1.00%, Mn: 2.4-3.7%, Ti:0.15-1.00%, TiO2 5.0-8.0%, Al: 0.20-0.50%, Al2O3: 0.05-0.5%, B: 0.003-0.020%, Mg: 0.3-1.0%, and the balance is iron and unavoidable impurities. Furthermore, a relationship: (4*Ti + 10*Al - 3*Si) >=1.0 is satisfied, wherein (Ti) represents the quantity of Ti calculated according to the Ti and the TiO2.

Description

technical field [0001] The present invention relates to a flux-cored welding wire suitable for gas-shielded arc welding of steel plates made of mild steel and high-tensile steel. Background technique [0002] Conventionally, the following configurations have been proposed as flux-cored wires suitable for gas-shielded arc welding. For example, Patent Document 1 proposes a gas-shielded arc welding flux-cored wire containing a predetermined amount of TiO with respect to the total mass of the wire. 2 , SiO 2 , ZrO 2 , CaO, Na 2 O, K 2 O, F, C, Si, Mn, Al, Mg, P, S, B, Bi, Fe and unavoidable impurities in the balance, and Na 2 O+K 2 O, Mn / Si, and Al+Mg are predetermined amounts. [0003] Patent Document 1: JP-A-2006-289404 [0004] However, the welding wire described in Patent Document 1 does not contain Ti and also has a small Mn content. Therefore, there is a problem of high-temperature cracking in the first layer welding in single-face butt joint welding of steel plate...

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): B23K35/368
Inventor 岛本正树石田齐坂本浩一笹仓秀司柿崎智纪
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