Welded metal and titanium dioxide flux-cored wire

A technology for welding metal, titanium dioxide

Inactive Publication Date: 2009-01-28
KOBE STEEL LTD
View PDF2 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] In addition, in Patent Document 2, Al is added excessively, and such excess Al addition will cause a decrease in the ductility of the weld metal, so it is not preferable.
[0012] Thus, there is no titanium dioxide-based FCW with good workability and high-temperature crack resistance at the level of solid wire.

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
  • Welded metal and titanium dioxide flux-cored wire
  • Welded metal and titanium dioxide flux-cored wire
  • Welded metal and titanium dioxide flux-cored wire

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0032] Hereinafter, the present invention will be specifically described with reference to the drawings. First, the reasons for adding components and limiting the composition of the weld metal of the present invention will be described.

[0033] "B: 0.005% by mass or less (excluding 0)"

[0034] P is added as an element that improves the toughness of the weld metal part, but if the content of B exceeds 0.005% by mass, the high temperature crack resistance will be poor, so it is preferably 0.005% by mass or less.

[0035] "N: 0.0045 to 0.02% by mass"

[0036] N is an element that ensures the strength of the weld metal portion. In addition, N cures B as BN, thereby having an effect of improving high-temperature crack susceptibility. However, these effects are insufficient when N is less than 0.0045% by mass. On the other hand, if the N content exceeds 0.02% by mass, the toughness of the weld metal part will be significantly reduced. Therefore, N is preferably 0.0045 to 0.02...

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
Login to view more

Abstract

A titanium dioxide flux-cored wire is provided that can acquire a welding metal having high-temperature crack resistance equivalent to or above that of solid core wire, and can obtain the welding metal with high welding processibility (all-attitude welding). The welding metal welded by the titanium dioxide flux-cored wire has more than 0.029% of content of C on the basis of mass percent of total mass of the welding metal, and respectively sets contents of B, C, Mn, N, P, S, Si and Ti as [B], [C], [Mn], [N], [P], [S], [Si], [Ti], temperature of solidus Ts defined by the following formula is above 1355 DEG C, so as to contain the ingredients hereinbefore. Ts = 1538-8903*[B]-982*[C]-6.64*[Mn]-511*[N]-368*[P]-3603*[S]-47.0*[Si]-205*[Ti]-17.

Description

technical field [0001] The present invention relates to TiO 2 (Titanium dioxide)-based flux-cored wire (hereinafter referred to as FCW: Flux coredwire) welded metal and the titanium dioxide-based flux-cored wire, especially related to improving the high-temperature crack resistance of the weld metal to be equal to or better than that of solid cored wire technology. Background technique [0002] In the field of manufacturing large-scale welded structures such as shipbuilding and bridges, in order to achieve welding efficiency, when welding butt welded joints made of medium and thick plate steel plates, it is necessary to achieve narrow grooves in the joints. On the other hand, , it is necessary to increase the deposition amount of each layer of weld bead, and complete the welding with as few as possible as few as possible of about 1 to 3 layers of weld bead, so it is implemented under the condition of less weld bead and high heat energy input by means of gas shielded arc wel...

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 Applications(China)
IPC IPC(8): B23K35/368
CPCB23K35/30C22C38/001C22C38/02C22C38/04C22C38/14
Inventor 岛本正树石田齐石崎圭人坂本浩一
Owner KOBE STEEL 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
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap