Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
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
This helps you quickly interpret patents by identifying the three key elements:
Problems solved by technology
Method used
Benefits of technology
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
Click on the blue label to locate the original text in one second.
Reading with bidirectional positioning of images and text.
Smart Image
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
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
Application Date:The date an application was filed.
Publication Date:The date a patent or application was officially published.
First Publication Date:The earliest publication date of a patent with the same application number.
Issue Date:Publication date of the patent grant document.
PCT Entry Date:The Entry date of PCT National Phase.
Estimated Expiry Date:The statutory expiry date of a patent right according to the Patent Law, and it is the longest term of protection that the patent right can achieve without the termination of the patent right due to other reasons(Term extension factor has been taken into account ).
Invalid Date:Actual expiry date is based on effective date or publication date of legal transaction data of invalid patent.
Login to view more 
Login to view more