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High-strength and ductility aluminum-silicon-based composite welding wire and preparation method thereof

A composite material and welding wire technology, applied in welding equipment, welding/cutting medium/material, welding medium, etc., can solve the problems of inability to strengthen elements of aluminum-silicon alloy and easily cause pores, and achieve the effect of performance improvement

Active Publication Date: 2019-10-08
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The study found that the Mg element has a certain loss in the process of arc printing, and it is easy to cause pores during the loss process. Therefore, although the Mg element has a strengthening effect on the aluminum-silicon alloy, it cannot be used as the main strengthening element for the arc-printed aluminum-silicon alloy.

Method used

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  • High-strength and ductility aluminum-silicon-based composite welding wire and preparation method thereof
  • High-strength and ductility aluminum-silicon-based composite welding wire and preparation method thereof
  • High-strength and ductility aluminum-silicon-based composite welding wire and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Put 299g of pure aluminum and 680g of Al-Si master alloy in a crucible, wait for it to melt, then add JZF-03 type covering agent to cover it evenly, then raise the temperature to 700°C for melting; put the uniformly mixed KBF 4 、K 2 TiF 6 After the powder is dried, it is added to the melt and stirred. After the reaction is completed, the masterbatch is obtained after the slag is removed; after the masterbatch is melted in a crucible, 11g of Mg pellets are added, and JZJ type harmless aluminum alloy refining agent is added for degassing and refining. The temperature is 650~750°C, put the melt at rest for 45 minutes to obtain an ingot; perform homogenization annealing on the ingot, that is, keep it at a temperature of 505°C for 28 hours. The fully homogenized aluminum-based composite billet is extruded into an aluminum alloy wire billet with a diameter of 20mm by an extrusion machine, the extrusion ratio is controlled at 8, and the extrusion speed is 1.0-2.0m / min; the dr...

Embodiment 2

[0045] Put 330g of pure aluminum and 654g of Al-Si master alloy in a crucible, wait for it to melt, add JZF-03 type covering agent to cover evenly, then raise the temperature to 750°C for melting; put the uniformly mixed KBF 4 、K 2 TiF 6 After the powder is dried, it is added to the melt and stirred. After the reaction is completed, the masterbatch is obtained after the slag is removed; the masterbatch is put into a crucible and melted, and then 7g of Mg particles are added in sequence, and JZJ type harmless aluminum alloy refining agent is added for degassing and refining. The temperature is 650-750°C, and the melt is obtained after standing for 50 minutes; the ingot is subjected to homogenization annealing, that is, it is kept at a temperature of 510°C for 30 hours. The fully homogenized aluminum-based composite billet is extruded into an aluminum alloy wire billet with a diameter of 20mm by an extrusion machine, the extrusion ratio is controlled at 7.5, and the extrusion s...

Embodiment 3

[0051] Put 293.8g of pure aluminum and 686g of Al-Si master alloy in a crucible, wait for it to melt, add JZF-03 type covering agent to cover evenly, then raise the temperature to 800°C for melting; put the uniformly mixed KBF 4 、K 2 TiF 6 After the powder is dried, it is added to the melt and stirred. After the reaction is completed, the masterbatch is obtained after the slag is removed; the masterbatch is put into the crucible to melt, and after adding 4.5g of Mg pellets in turn, add JZJ type harmless aluminum alloy refining agent for degassing and refining. The temperature is 650-750°C, and the melt is obtained after standing for 60 minutes; the ingot is homogenized and annealed, that is, kept at a temperature of 500°C for 24 hours. The fully homogenized aluminum-based composite billet is extruded into an aluminum alloy wire billet with a diameter of 20mm by an extrusion machine, the extrusion ratio is controlled at 7, and the extrusion speed is 1.0-2.0m / min; the drawing i...

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Abstract

The invention provides a high-strength and ductility aluminum-silicon-based composite welding wire and a preparation method thereof. The reinforcing phase of the aluminum-silicon composite material welding wire is in-situ self-generated TiB2 ceramic particles, and a matrix alloy is Al - Si - Mg, wherein the weight percentage of Al - Si is 6.5%-7.5%, the weight percentage of Mg is 0.4%-1. The preparation method comprises the following steps of taking pure aluminum, Al-Si intermediate alloy, Al-Cu intermediate alloy, Al-Mg intermediate alloy and the like as raw materials to prepare intermediatemelt, and after homogenization heat treatment, carrying out hot extrusion, drawing and surface treatment on the intermediate melt to obtain the composite material welding wire. According to the preparation method of the aluminum-silicon-based composite material welding wire, the prepared aluminum-silicon-based composite material welding wire is suitable for electric arc additive manufacturing technology.

Description

technical field [0001] The invention relates to a high-strength and tough aluminum-silicon-based composite welding wire and a preparation method thereof, in particular to a high-strength and high-modulus nanoparticle-reinforced aluminum-silicon-based composite welding wire applied to arc additive manufacturing and a preparation method thereof. Background technique [0002] Aluminum alloy has high specific strength, specific modulus, fracture toughness, fatigue strength and corrosion resistance, and also has good forming process and weldability, and the cost is relatively low. Therefore, it has become a It is the most widely used non-ferrous metal structural material in the fields of train, chemical industry and military. Among them, aluminum-silicon alloy has good casting performance and wear resistance, and is used in the largest amount in casting aluminum alloys. Addition of TiB by in situ autogenous method 2 Particles further enhance their mechanical properties such as ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/02C22C32/00C22F1/043C22C1/10B22F3/105B33Y70/00B23K35/28B23K35/36B23K35/40
CPCC22C21/02C22C32/0073C22F1/043C22C1/1036B33Y70/00B23K35/40B23K35/286B23K35/3606B22F10/00C22C1/1052Y02P10/25B22F10/20C23F3/03
Inventor 李险峰夏存娟陈东邓亚琪王浩伟
Owner SHANGHAI JIAO TONG UNIV
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