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Welding wire for preparation of aluminum-based wear-resistant coating through magnetron deposition formation

A technology of wear-resistant cladding and wire materials, which is applied in the field of Al-Si wire materials, can solve the problems that Al-Si wire materials cannot meet the production requirements, and achieve the effects of excellent mechanical properties, excellent wear resistance, and smooth grain transition

Active Publication Date: 2013-04-03
ACADEMY OF ARMORED FORCES ENG PLA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the advancement of technology, ordinary Al-Si wire cannot meet the production needs, and adding elements with special properties to Al-Si wire has become an important means to improve the performance of wire

Method used

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  • Welding wire for preparation of aluminum-based wear-resistant coating through magnetron deposition formation
  • Welding wire for preparation of aluminum-based wear-resistant coating through magnetron deposition formation
  • Welding wire for preparation of aluminum-based wear-resistant coating through magnetron deposition formation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] The Mg element added separately in the Al-Si alloy welding wire with the grade of 4043, the Mg element content is 0.15%, 0.25%, and 0.35% respectively, and three kinds of welding wires are made into 4143-1, 4143-2, and 4143-3. Using the Fronius full digital TPS-4000 DC pulse MIG welding deposition forming technology with external longitudinal magnetic field in the remanufacturing state key laboratory, using 4043, 4143-1, 4143-2, 4143-3 welding wires to weld aluminum alloys, and get welded connector. Tensile test is carried out on the joint, and the yield strength σ 0.2 Respectively 104MPa, 108MPa, 105MPa, tensile strength σ b 168MPa, 179MPa, and 170 MPa respectively; the flexural strength of the welds is 400 MPa, 426 MPa, and 405 MPa respectively; comparing the tensile test results of 4043 and 4143-1 welding wires, the yield strength ratio of joint welds obtained using 4143-1 welding wires is The 4043 welding wire increased by 5.6%, the tensile strength increased by 8...

Embodiment 2

[0019] Welded joints obtained by welding wires 4043 and 4143-2 in Example 1 were used to observe the structure of each welding area, and the fusion zone is the position where the joint is easy to break. figure 1 (a) is the metallographic structure of the fusion zone of the 4043 welding wire welding joint, figure 1 (b) is the metallographic structure of the fusion zone of the 4143-2 welding wire welding joint. The analysis shows that the grains in the fusion area of ​​4043 welding wire are columnar grains, while the growth area of ​​columnar grains in the fusion area of ​​4143-2 welding wire becomes narrower, the directionality is weakened, and it grows in the form of equiaxed grains, and the transition of the grain form tends to be gentle, reducing Mutations in the tissue are eliminated, which leads to a more uniform performance of the joint.

Embodiment 3

[0021] Welding wires were prepared by adding Mg, Sc, and Zr elements to Al-Si alloy welding wires of grade 4043. When the content of Mg element is 0.25%, the content of Sc is 0.3%, and the content of Zr is 0, the 4143-4 welding wire is made; but the content of Mg element is 0.25%, the content of Sc is 0, and the content of Zr is 0.15%. When the 4143-5 welding wire is made; when the content of Mg element is 0.25%, the content of Sc is 0.3%, and the content of Zr is 0.15%, it is made into 4143-6 welding wire; Fronius full-digital TPS-4000 DC pulse MIG welding deposition forming technology uses 4143-4, 4143-5, 4143-6 welding wires to weld aluminum alloys to obtain welded joints. Observe the metallographic structure of the welding fusion zone, figure 2 (a) is the metallographic structure of the fusion zone of the 4143-4 welding wire welding joint, figure 2 (b) is the metallographic structure of the fusion zone of the 4143-5 welding wire welding joint, figure 2 (c) is the met...

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Abstract

The invention relates to a welding wire for preparation of an aluminum-based wear-resistant coating through magnetron deposition formation, belonging to the field of weldments. The wire is prepared by adding Mg, Sc, Zr and other trace elements based on an ordinary Al-Si alloy wire, and comprises the following components by mass percent: 4.5-6 percent of Si, 0-0.2 percent of Fe, 0-0.3 percent of Cu, 0-0.2 percent of Ti, 0-0.45 percent of Zr and Sc, 0.15-0.35 percent of Mg, and Al as a remaining component. When the welding wire is used for preparation of the coating, grain transition is smooth, tissues are not subject to mutation, and excellent mechanical properties can be achieved. The wear resistance of the coating is excellent, the friction coefficient is only 0.32, surface scratches of an aluminum alloy substrate can be effectively reduced by the coating, and the wear resistance of the aluminum alloy substrate in high-temperature as well as hot and humid environments can be improved.

Description

technical field [0001] The invention relates to an Al-Si wire material used for magnetron welding cladding forming to prepare an aluminum-based wear-resistant coating, which is mainly prepared by adding Mg elements, Sc, Zr and other trace elements to the Al-Si alloy welding wire with high strength. , good plasticity and good wear resistance coating. Background technique [0002] As a new process of rapid prototyping technology, welding deposition rapid prototyping uses the principle of surfacing technology. It can not only be used for surface modification of parts, but also repair defective parts and directly form new parts. Aluminum alloy surface repair technology includes welding methods such as ordinary electrode arc welding, MIG welding and plasma welding, thermal spraying technology and brush plating technology. Compared with thermal spraying and electric brush plating technology, welding deposition technology is metallurgically combined with the substrate, and its bon...

Claims

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Application Information

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IPC IPC(8): B23K35/28
Inventor 朱胜赵志浩王晓明姚巨坤王启伟崔建忠刘玉项
Owner ACADEMY OF ARMORED FORCES ENG PLA
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