Welding wire for die-casting aluminum alloy and preparation method of welding wire

A technology of casting aluminum alloy and welding wire, applied in welding equipment, metal processing equipment, welding medium, etc., can solve the problems of slag inclusion and cracks, low joint strength, poor internal structure, etc.

Active Publication Date: 2021-09-14
沈阳育成鑫成果转化技术服务有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide welding materials needed in the tailor welding process for a class of Al-Si series die-casting aluminum alloys that may become the material of battery pack trays, such as AlSi9MnMoZr, such as welding wire for gas shielded welding, specifically a Welding wire for die-casting aluminum alloy and its preparation method, so as to solve the problems of poor internal structure, low joint strength, easy occurrence of air holes, slag inclusions and cracks during welding in the process of welding die-casting aluminum alloy with currently commercially available welding wire

Method used

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  • Welding wire for die-casting aluminum alloy and preparation method of welding wire

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Embodiment 1

[0044] A welding wire for die-casting aluminum alloy, the welding wire contains the following components and mass percentages: Si: 11.2%, Mn: 0.35%, Zr: 0.21%, Mo: 0.05%, Sr: 0.03%, Ti: 0.05%, Fe : 0.12%, Cu: 0.01%, and the balance is Al.

[0045] A method for preparing welding wire for die-casting aluminum alloys, comprising the following steps:

[0046] Step 1: Semi-continuous casting

[0047] (1) According to the formula of the designed die-casting aluminum alloy welding wire, add pure Al, Al-5Si master alloy, Al-5Zr master alloy, Al-5Ti master alloy, Al-5Mn master alloy in turn, at a temperature of 740 ℃ Melt down for 5 hours to obtain molten aluminum alloy. Smelting, refining and vacuum degassing treatment to obtain partially smelted molten metal; wherein, the time of vacuum treatment is 10min;

[0048] To the partially smelted molten metal after vacuum treatment, add the remaining raw materials in sequence for smelting for 1 hour to obtain a completely smelted molten ...

Embodiment 2

[0065] A welding wire for die-casting aluminum alloy, the welding wire contains the following components and their mass percentages: Si: 11.5%, Mn: 0.4%, Zr: 0.2%, Mo: 0.1%, Sr: 0.05%, Ti: 0.1%, Fe : 0.11%, Cu: 0.02%, and the balance is Al.

[0066] A method for preparing welding wire for die-casting aluminum alloys, comprising the following steps:

[0067] Step 1: Semi-continuous casting

[0068] (1) According to the formula of the designed die-casting aluminum alloy welding wire, add pure Al, Al-5Si master alloy, Al-5Zr master alloy, Al-5Ti master alloy, Al-5Mn master alloy in turn, at a temperature of 740 ℃ Melt down for 5.5 hours to obtain molten aluminum alloy. Smelting, refining and vacuum degassing treatment to obtain partially smelted molten metal; wherein, the time of vacuum treatment is 15min;

[0069] To the partially smelted molten metal after vacuum treatment, add the remaining raw materials in sequence for smelting for 1 hour to obtain a completely smelted mol...

Embodiment 3

[0087] A welding wire for die-casting aluminum alloy, the welding wire contains the following components and mass percentages: Si: 12.5%, Mn: 0.5%, Zr: 0.3%, Mo: 0.1%, Sr: 0.02%, Ti: 0.15%, Fe : 0.15%, Cu: 0.02%, and the balance is Al and unavoidable impurities. The maximum value of a single impurity element is ≤0.05%, and the total is ≤0.15%.

[0088] A method for preparing welding wire for die-casting aluminum alloys, comprising the following steps:

[0089] Step 1: Semi-continuous casting

[0090] (1) According to the formula of the designed die-casting aluminum alloy welding wire, add pure Al, Al-5Si master alloy, Al-5Zr master alloy, Al-5Ti master alloy, Al-5Mn master alloy in turn, at a temperature of 740 ℃ smelting for 3 hours, refining and vacuum degassing treatment for 10 minutes, to obtain partially smelted molten metal;

[0091] Add the remaining raw materials in sequence to the partially smelted molten metal after vacuum treatment, and carry out smelting to obta...

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Abstract

The invention discloses a welding wire for die-casting aluminum alloy and a preparation method thereof, and belongs to the field of manufacturing of aluminum alloy welding wires. The welding wire for the die-casting aluminum alloy comprises, by mass, 10%-13% of Si, 0.3%-0.5% of Mn, 0.2%-0.3% of Zr, smaller than or equal to 0.2% of Mo, 0.02%-0.05% of Sr, 0.05%-0.15% of Ti, smaller than or equal to 0.15% of Fe and the balance is Al and inevitable impurities, the mass percentage of a single impurity is smaller than or equal to 0.05%, and the total mass percentage of the inevitable impurities is smaller than or equal to 0.15%. The preparation method comprises the steps of semi-continuous casting, machining, preheating, extruding, annealing, wire stretching and welding wire drawing. The welding wire solves the problems that the internal structure is poor, the joint strength is low, air holes, slag inclusion, cracks and the like are prone to occurring in the welding process when a current commercially available welding wire is adopted for welding die-casting aluminum alloy.

Description

technical field [0001] The invention relates to the field of manufacturing aluminum alloy welding wire, in particular to a welding wire for die-casting aluminum alloy and a preparation method thereof. Background technique [0002] Automobile electrification is a survival strategy generally recognized by domestic and foreign automobile industries. In electric vehicles, power batteries are one of the most important core technologies, which to a certain extent determine the usability, reliability and safety of electric vehicles. The safety and manufacturing cost of the battery pack installation tray used for assembling power batteries (referred to as the battery pack tray) is being paid more and more attention by automobile (parts) manufacturers. [0003] Since lightweight is the key development direction of electric vehicles, battery pack trays are mostly made of aluminum alloy. According to the supply characteristics of aluminum alloy materials, the current battery pack tray...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/28B23K35/40C22C21/02C22F1/043B22D7/00B22D11/00C21D9/52C22C1/03
CPCB23K35/28B23K35/286B23K35/40C22C21/02B22D11/003B22D7/005C22F1/043C21D9/525C22C1/026C22C1/03
Inventor 郭音陈怀宁蔡倩吴昌忠
Owner 沈阳育成鑫成果转化技术服务有限公司
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