Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
A tungsten argon arc and brazing method technology, applied in arc welding equipment, electric heating device, welding equipment and other directions, can solve the problems of affecting the wetting and filling of the solder, large thermal stress, difficult to use flux, etc. The effect of high brazing rate and high density
Active Publication Date: 2016-03-16
ZHENGZHOU RES INST OF MECHANICAL ENG CO LTD
View PDF6 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, due to the concentration of heat during arc heating, a temperature field with a large gradient is formed during welding, resulting in large thermal stress
In addition, it is difficult to use flux when arc heating is used, which affects solder wetting and joint filling, and has an adverse effect on joint performance
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 1
[0014] The 316LN austenitic stainless steel base metal 1 is butted, the base metal sample is 100mm long, 30mm wide, and 2mm thick. Ensure that the gap can be filled, and cover an appropriate amount of 101 flux 3 on the brazing seam and the solder 2, such as figure 1 shown.
[0015] Use the flame gun 4 (hydrogen-oxygen flame gun can be selected) to preheat the surface of the base metal 1 that is far away from the brazing joint, and melt the 101 flux 3 through heat transfer, such as figure 2 shown.
[0016] Under the protection of the molten flux 5, use the argon tungsten arc torch 7 to quickly heat the solder 2 to melt it through the discharge of the arc 8, and the liquid solder 6 fills the gap of the base metal 1, as image 3 shown.
[0017] During the cooling process, the base metal 1 is baked with a flame gun 4 to prevent excessive cooling, and after cooling, a brazing seam 9 is formed, such as Figure 4 shown.
[0018] The dimensions of the brazed joints were measure...
Embodiment 2
[0020] The 316LN austenitic stainless steel base metal 1 is butted, the base metal sample is 100mm long, 30mm wide, and 2mm thick, the width of the brazing seam is 0.15mm, and the Cu-Mn-Ni brazing material 2 is preset above the brazing seam. Ensure that the gap can be filled, and cover an appropriate amount of 201 flux 3 on the brazing seam and the solder 2, such as figure 1 shown.
[0021] Use the flame gun 4 (butane flame gun can be selected) to preheat the surface of the base metal 1 that is far away from the brazing joint, and melt the flux 3 through heat transfer, such as figure 2 shown.
[0022] Under the protection of the molten flux 5, use the argon tungsten arc torch 7 to quickly heat the solder 2 to melt it through the discharge of the arc 8, and the liquid solder 6 fills the gap of the base metal 1, as image 3 shown.
[0023] During the cooling process, the base metal 1 is baked with a flame gun 4 to prevent excessive cooling, and after cooling, a brazing seam...
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
width
aaaaa
aaaaa
Login to view more
Abstract
The invention relates to a flame preheating tungsten electrode argon arc brazing method used for austenitic stainless steel brazing and connection. The method includes the following steps that multiple pieces of stainless steel parent metal are in butt joint, the brazing seam gap width ranges from 0.05 mm to 0.5 mm, brazing filler metal is prearranged above brazing seams, gaps can be filled with the brazing filler metal, and the gaps of the brazing seams and brazing filler metal welding wires are covered with brazing flux; the surfaces of the pieces of parent metal far away from the brazing seams are preheated through flame guns, and the brazing flux is melted through heat transfer; and after the brazing flux is completely melted, argon tungsten-arc welding guns are used for conducting arc discharge to heat the brazing filler metal wires quickly, gaps of the parent metal are filled with the melted brazing filler metal, and the parent metal is baked through flames in the cooling process to prevent the parent metal from being cooled too quickly or cooled at uneven temperatures. The flame preheating tungsten electrode argon arc brazing method has the beneficial effects that the problems that thermal stress and thermal deformation are serious and interfaces are prone to cracking when austenitic stainless steel is directly brazed in an argon arc manner are solved, and brazing joints high in density, high in brazed rate and small in deformation can be obtained.
Description
technical field [0001] The invention relates to a flame preheating tungsten argon arc brazing method, which is used for brazing connection of austenitic stainless steel and belongs to the field of brazing technology. Background technique [0002] Due to its excellent high temperature resistance, oxidation resistance and corrosion resistance, austenitic stainless steel is the most commonly used material for manufacturing components used in harsh environments such as vacuum, low temperature and radiation. Due to the large size of stainless steel components in large-scale equipment and high requirements for dimensional accuracy, the use of fusion welding technology often results in welding deformation exceeding the allowable limit. Arc brazing technology has low heat input, does not melt the base metal, is relatively easier to control welding deformation, and can avoid thermal damage to components. It is one of the preferred connection technologies for austenitic stainless stee...
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