High-toughness high-welding speed sintered flux suitable for submerged-arc welding of X90/X100 ultrahigh-strength pipeline steel pipe
What is Al technical title?
Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
An ultra-high-strength, sintered flux technology, applied in the direction of welding medium, welding equipment, welding/cutting medium/material, etc., can solve the problems that cannot meet the weld performance and process requirements, and achieve high toughness, smooth weld surface, good transition effect
Active Publication Date: 2013-07-10
BC P INC CHINA NAT PETROLEUM CORP +1
View PDF10 Cites 8 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
However, the X80 flux used at this stage is far from meeting the performance and process requirements of the weld, so it is necessary to develop X90 / X100 sintered flux for ultra-high-strength pipeline steel
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.
[0026] 2) Dry mix the raw materials containing certain ingredients according to a certain ratio, and after stirring evenly, add an appropriate amount of adhesive (potassium sodium water glass) according to a certain percentage of the total mass of the mixture for wet mixing, and then use a dustpan or make According to GB / T 12470-2003 "Welding wire and flux for low alloy steel for submerged arc welding", the particle size of the flux is controlled between 10-60 mesh, and then dried at 200-250°C at low temperature , and then sintered at a high temperature of 800-900 ° C, and then packed in a moisture-proof packaging bag after being screened with 10-60 mesh.
[0027] 3) Mechanical properties of weld deposited metal test
[0028]
[0029] 4) Welding test and performance test (with high steel grade welding wire...
example 2
[0032] 1) Flux composition (wt%): MgO24.8, CaF 2 21.5, Al 2 o 3 21.5, CaO6.5, Y 2 o 3 5.3, MnO6.8, SiO 2 24.5, S0.012, P0.021, add deoxidizer Si-Fe2~3;
[0033] 2) Same manufacturing process as Example 1
[0034] 3) Mechanical properties of weld deposited metal test
[0035]
[0036] 4) Welding test and performance test (with high steel grade welding wire BG-H06H2-2 and corresponding pipeline steel raw materials)
[0037]
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
Property
Measurement
Unit
strength
aaaaa
aaaaa
Login to view more
Abstract
The invention discloses a high-toughness high-welding speed sintered flux suitable for the submerged-arc welding of an X90/X100 ultrahigh-strength pipeline steel pipe, and the high-toughness high-welding speed sintered flux comprises the following components in percentage by weight: more than or equal to 15 and less than or equal to 20 of CaF2, more than or equal to 20 and less than or equal to 25 of MgO, more than or equal to 15 and less than or equal to 20 of Al2O3, more than or equal to 10 and less than or equal to 15 of CaO, more than or equal to 1 and less than or equal to 5 of MnO, more than or equal to 25 and less than or equal to 30 of SiO2, more than or equal to 3 and less than or equal to 8 of Y2O3 and more than or equal to 1 and less than or equal to 4 of a reducing agent. The high-toughness high-welding velocity sintered flux disclosed by the invention ensures that the submerged-arc welding speed of the X90/X100 ultrahigh-strength pipeline steel pipe is at the high welding speed of 1.5-1.8 m/minute, has good processing property of a welding seam, achieves the welding strength of more than 780 MPa, achieves the average toughness value of 130 J, achieves the deposited metal strength of more than 760 MPa, achieves the diffusible hydrogen content of less than 6.0ml/100g (mercury method), belongs to a low-hydrogen welding material and can realize the high-strength high-toughness matching of the submerged-arc welding seam of the ultrahigh-strength pipeline steel pipe.
Description
Technical field: [0001] The invention belongs to submerged arc welding materials for ultra-high-strength pipeline steel pipes. It is aimed at the current development needs of oil and gas pipelines, and develops a high-toughness and high-speed welding flux suitable for submerged arc welding of X90 / X100 ultra-high-strength pipeline steel pipes. After using the flux of the present invention and matching the corresponding welding wire to weld the domestic X90 / X100 ultra-high-strength pipeline steel, it can ensure that at a high welding speed, the weld seam has high strength and high impact toughness at the same time, and can fully achieve API-5L-44 version standard requirements. Background technique: [0002] Oil and gas pipelines are an economical, safe and uninterrupted long-distance transportation tool for oil and natural gas. In recent years, with the continuous development and improvement of pipeline construction projects, the construction of long-distance gas pipelines wi...
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