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An aluminum-silicon alloy welding wire suitable for wire additive manufacturing

An aluminum-silicon alloy and additive manufacturing technology, used in manufacturing tools, welding equipment, welding media, etc., can solve the problems of not being able to give full play to the characteristics of the alloy manufacturing process, and achieve excellent appearance quality, good forming, and improved high temperature stability. Effect

Active Publication Date: 2021-10-26
抚顺东工冶金材料技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The composition of traditional brands of aluminum-silicon alloys, such as ZL101A, ZL114A, 6061, 6063, etc., is designed according to the casting or deformation processing forming process. The process of rapid melting and recooling of the material, the alloy has a great cooling rate during the solidification process, and the beneficial or harmful effects of the heterogeneous nucleation elements (such as Ti, etc.) and impurity elements (such as Fe) in the alloy are different from the traditional ones. The forming methods are very different, and the characteristics of the alloy itself and the wire additive manufacturing process cannot be fully utilized

Method used

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  • An aluminum-silicon alloy welding wire suitable for wire additive manufacturing
  • An aluminum-silicon alloy welding wire suitable for wire additive manufacturing
  • An aluminum-silicon alloy welding wire suitable for wire additive manufacturing

Examples

Experimental program
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Effect test

Embodiment 1

[0049] The invention provides an aluminum-silicon alloy welding wire suitable for wire material additive manufacturing, the preparation steps of which are as follows:

[0050] (1) Raw material configuration: Al: 118kg, Si: 9.10kg, Mg: 0.78kg, AlTi10: 1.56, AlLa30: 0.13kg, AlSr10: 0.39kg are melted and alloyed in an intermediate frequency furnace, and the melting temperature is controlled at 750± 10°C, the feeding sequence is: Al—Si—AlLa30—AlSr10—AlTi10—Mg, and the gap between each two alloy materials should not be less than 3 minutes;

[0051] (2) After smelting, the aluminum alloy melt is subjected to inert gas rotary injection refining and secondary vacuum refining. During the refining process, the temperature of the aluminum melt is controlled at 750°C±10°C, and the inert gas is 99.999% Ar.

[0052] (3) The refined aluminum alloy melt is kept at 720°C±10°C in an inert gas-protected resistance furnace and continuously cast into a disc with a diameter of 12mm±1mm, and the cas...

Embodiment 2

[0059] Using the welding wire prepared in Example 1 as the raw material, the stacking was carried out by CMT additive process at room temperature. The accumulation process is well formed, and the appearance of the accumulation body is as follows figure 2 shown. The directly formed accumulation structure has smaller primary dendrite spacing (DAS) and secondary dendrite arm spacing (SDAS), and the second phase particles such as eutectic silicon are distributed among the dendrite arms, such as image 3 shown. After T6 heat treatment, the eutectic silicon is fully spheroidized, the second phase particles are evenly distributed in the matrix, and the dendrites are all eliminated, as shown in Figure 4 shown.

[0060] The mechanical properties of the accumulated body after T6 heat treatment were tested at room temperature and 200°C / 30min, and the results are shown in Table 1.

[0061] Table 1 The mechanical properties of the accumulation body of the present invention and compar...

Embodiment 3

[0065] The invention is an aluminum-silicon alloy welding wire suitable for wire material additive manufacturing. The alloy composition is calculated by mass percentage: silicon Si: 6.98, magnesium Mg: 0.61, titanium Ti: 0.12%, strontium Sr: 0.030%, lanthanum La: 0.028 %, iron Fe: 0.08, and the balance is aluminum Al.

[0066] Prepared according to the processing method described in the invention The processing process is smooth, and the finished product rate reaches 92%. The welding wire is used as filler for welding, and the weld seam grade reaches Class I, and the welding strength coefficient is more than 95%.

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Abstract

The invention discloses an aluminum-silicon alloy welding wire suitable for wire material additive manufacturing. In mass percentage: silicon Si: 6.50-7.50%, magnesium Mg: 0.45-0.60%, titanium Ti: 0.05-0.15%, strontium Sr+lanthanum La: 0.03-0.10%, iron Fe: ≤0.15%, H content less than 0.18μg / g, other single impurity elements: ≤0.05%, other impurity elements total ≤0.15%, and the balance is aluminum Al. The production method includes batching, smelting, primary refining, secondary refining, continuous casting and extrusion, rolling and / or forging and / or wire drawing combined with reducing, annealing, surface mechanical scraping and cleaning, surface coating and other steps. The welding wire of the present invention has excellent internal quality and appearance quality, and good process performance; after T6 heat treatment, the additively formed stack has uniform structure, good room temperature performance and high temperature performance stability, and no difference in isotropic performance.

Description

technical field [0001] The invention belongs to the field of metal materials, and in particular relates to an aluminum-silicon alloy welding wire suitable for wire additive manufacturing. [0002] technical background [0003] Aluminum-silicon series casting alloy has excellent casting performance and good processing technology performance. After modification and heat treatment, it has good mechanical, physical and corrosion resistance properties. It is the most widely used cast aluminum alloy, and its consumption accounts for the total output of aluminum alloy castings. More than 80% of them are widely used in the fields of aviation, aerospace and weapons. However, with the rapid development of modern high-end equipment such as aviation, aerospace and weapons in the direction of large-scale, high-parameter, high-reliability and long-life service under extremely harsh conditions, the size of key metal components of aluminum alloys is becoming larger and larger, and the struct...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/28
CPCB23K35/286
Inventor 王伟李承德翟玉春
Owner 抚顺东工冶金材料技术有限公司
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