Al-Mg-Er welding wire and preparation process thereof
What is Al technical title?
Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
A welding wire and process technology, applied in the field of welding wire and its preparation technology, can solve problems such as reduced corrosion resistance, and achieve the effects of ensuring strength, refining weld structure, and improving plasticity and toughness
Active Publication Date: 2010-06-02
BEIJING UNIV OF TECH
View PDF0 Cites 26 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, increasing the Mg content in Al-Mg based solder alloys causes a drastic decrease in corrosion resistance
However, there are no...
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
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0028] Al-Mg-Er series welding wire, its main chemical composition (%) is: Mg: 4.3, Mn: 1.2, Zr: 0.05, Er: 0.6, Al balance.
[0029] Its preparation process:
[0030] (1) Preparation of raw materials, the matrix element aluminum is A 00 Pure aluminum and magnesium are added in the form of 1# pure magnesium, and Mn, Zr, and Er are added in the form of Al-based master alloys, prepared according to mass percentage;
[0031] (2) Using medium frequency induction resistance furnace and clay graphite crucible for melting, after the alloy is completely melted, use C 2 Cl 6 Refining degassing, adding covering agent (NaCl 8%, CaF 2 10%, MgCl 2 67%, MgF 2 / CaCl 2 15%, the dosage is 3%-5% of the charge) protection, and then carry out secondary refining, standing still, slag removal, and casting into ingots;
[0032] (3) After cutting the head and milling the surface of the ingot alloy, perform homogenization annealing, the annealing temperature is 450-520 ° C, and the time is 5-...
Embodiment 2
[0038] Al-Mg-Er series welding wire, its main chemical composition (%) is: Mg: 4.7, Mn: 1, Zr: 0.1, Er: 0.5, Al balance.
[0039] Its preparation process is with embodiment 1.
[0040] In this embodiment, the tensile strength of the welding wire reaches 440 MPa, and the elongation reaches 14%. The welding wire is automatically TIG-welded, and the tensile strength of the welded joint can reach 340 MPa, and the elongation can reach 9%.
Embodiment 3
[0042] The main chemical composition (%) of Al-Mg-Er series welding wire is: Mg: 5.1, Mn: 0.8, Zr: 0.15, Er: 0.4, Al balance.
[0043] Its preparation process is with embodiment 1.
[0044] In this embodiment, the tensile strength of the welding wire reaches 450 MPa, and the elongation reaches 13%. The welding wire is automatically TIG-welded, and the tensile strength of the welded joint can reach 355 MPa, and the elongation can reach 10%.
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
Tensile strength
aaaaa
aaaaa
Tensile strength
aaaaa
aaaaa
Tensile strength
aaaaa
aaaaa
Login to view more
Abstract
The invention discloses an Al-Mg-Er welding wire and a preparation process thereof. The Al-Mg-Er welding wire mainly comprises the following chemical components in percentage by mass: 4.3 to 6.5 percent of Mg, 0.4 to1.2 percent of Mn, 0.05 to 1.3 percent of Zr, 0.1 to 0.6 percent of Er and the balance of Al and other inevitable impurities. The preparation method comprises: preparing pure aluminum ingots, pure magnesium ingots, Al-Mn(10.0) preliminary alloy, Al-Er (0.6) preliminary alloy and Al-Zr (4.5) preliminary alloy; melting the alloys in a mixing ratio in a medium frequency induction electric resistance furnace and performing casting to make a cast ingot; subjecting the homogenized cast ingot to end cutting and face milling and hot extrusion; and after intermediate annealing, performing wire drawing in a wire drawing machine while performing pass annealing, subjecting the wire drawn to surface treatment, and coiling the wire to obtain the Al-Mg-Er welding wire of the invention. The welding wire of the invention has the advantages that: the smelting process is stable and easy to implement and the drawing performance of the welding wire is high; the obvious refining molding performance of the structure of the welding wire is high, the strength of weld joint metal is guaranteed and that the plasticity of weld joint metal is equal to that of a parent metal is guaranteed; and the impurity content of the Al-Mg-Er welding wire is low, the toughness is improved, the solution strengthening of an aluminum substrate is promoted, and the strength of the weld joint metal is improved effectively.
Description
technical field [0001] The invention relates to an aluminum alloy welding wire for welding, in particular to a welding wire used for fusion welding of Al-Mg alloys and a preparation process thereof. Background technique [0002] At present, one direction of aluminum alloy research is to add trace rare earth elements to aluminum alloy to improve the strength of the alloy and obtain better comprehensive properties. In recent years, many scholars have studied the effect of rare earth element Er on aluminum and aluminum alloys. Xu Guofu et al. found that adding Er to Al-Zn-Mg alloy can significantly refine the grains of the cast alloy, and Er can be precipitated by dispersion. Er can also inhibit the recrystallization behavior of the alloy (XU Guo-fu, MOU Shen-zhou, NIE Zuo-ren and YINZhi-min, Effect of trace rare earth element Er on Al-Zn-Mg alloy [J]. Trans. Nonferrous Met. Soc. China, 2006, 16(1): 598-603). Yang Junjun and others added trace amounts of Er to pure aluminum, ...
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