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High-performance Al-Si welding wire alloy including trace La elements and preparation method of high-performance Al-Si welding wire alloy

An al-si, high-performance technology, applied in the field of high-performance Al-Si based welding wire alloys and their preparation, can solve problems such as difficulty in meeting plastic deformation requirements, and achieve the effect of improving performance

Inactive Publication Date: 2020-01-07
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the production practice shows that the plasticity of the alloy is still difficult to meet the plastic deformation requirements in the welding wire preparation process, and it is extremely necessary to improve the plasticity of the alloy and improve the plastic deformation capacity of the alloy

Method used

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  • High-performance Al-Si welding wire alloy including trace La elements and preparation method of high-performance Al-Si welding wire alloy
  • High-performance Al-Si welding wire alloy including trace La elements and preparation method of high-performance Al-Si welding wire alloy
  • High-performance Al-Si welding wire alloy including trace La elements and preparation method of high-performance Al-Si welding wire alloy

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Embodiment 1

[0022] In this embodiment, the preparation process of the high-performance Al-Si-based welding wire alloy containing a trace amount of La element is as follows:

[0023] The Al-6wt% Si alloy raw material is smelted with a resistance furnace, and the smelting temperature is 740 ° C. % sodium fluoroaluminate is uniformly mixed) to refine the Al-6wt% Si alloy melt so that the hydrogen content of the Al-6wt% Si alloy melt is 0.10ml / 100g, and the Al-La and Al-Sr master alloys are used. In the form of adding 0La+0.03wt%Sr and 0.06wt%La+0.03wt%Sr to the Al-6wt%Si alloy melt, the temperature was lowered to 720 ℃ after holding for 20 minutes, and Al-5Ti-1B master alloy was added. The content of Ti element is 0.015wt% and the content of B element is 0.003wt%, heat preservation and stirring for 10 minutes, metal mold casting is performed on the melt, and a high-performance Al-Si based welding wire alloy casting containing trace La element is obtained after solidification.

[0024] like ...

Embodiment 2

[0026] In this embodiment, the preparation process of the high-performance Al-Si-based welding wire alloy containing a trace amount of La element is as follows:

[0027] The Al-6wt% Si alloy raw material is smelted with a resistance furnace, and the smelting temperature is 740 ° C. % sodium fluoroaluminate is uniformly mixed) to refine the Al-6wt% Si alloy so that the hydrogen content of the Al-6wt% Si alloy melt is 0.10ml / 100g, in the form of Al-La and Al-Sr master alloys Add 0La+0.03wt%Sr and 0.06wt%La+0.03wt%Sr to the Al-6wt%Si alloy melt, respectively, keep the temperature for 20 minutes and then cool down to 720℃, and add Al-5Ti-1B to make the content of Ti element 0.015wt%, B element content of 0.003wt%, heat preservation and stirring for 10 minutes, metal mold casting is performed on the melt, and a high-performance Al-Si series welding wire alloy casting containing a trace amount of La element is obtained after solidification. The castings were machined into standard ...

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Abstract

The invention relates to the technical field of Al-Si welding wire alloys, in particular to a high-performance Al-Si welding wire alloy including trace La elements and a preparation method of the high-performance Al-Si welding wire alloy. The trace La elements are added into Al-Si alloy melt, alloy grain refinement and eutectic silicon deterioration are achieved, and on the premise of guaranteeingthe strength performance of the alloy, the plasticity of the alloy is greatly improved. The race La elements are added into the Al-Si welding wire alloy, the refinement capacity of an Al-5Ti-1B intermediate alloy to alpha-Al grains is strengthened, the refinement effect of the alpha-Al grains is improved, nodulizing of eutectic silicon is promoted, and therefore the plasticity and drawing performance of the alloy are improved, the welding performance of the alloy is improved, and the high-performance Al-Si welding wire alloy can be used for preparing an Al-Si welding wire alloy material withgood drawing forming quality.

Description

technical field [0001] The invention relates to the technical field of preparation of Al-Si series welding wire alloys, in particular to a high-performance Al-Si series welding wire alloy containing a trace amount of La element and a preparation method thereof. Background technique [0002] Al-Si alloy has the advantages of low melting point, good casting performance and small thermal expansion coefficient, and is an important aluminum alloy welding material. However, when the alloy melt is cooled to a certain temperature, α-Al grains are preferentially precipitated, followed by the Al-Si eutectic reaction (see figure 1 ), eventually forming coarse α-Al grains and eutectic silicon with a flaky structure. At present, traditional Al-5Ti-1B master alloy is commonly used in industry to refine α-Al grains, and Sr is used to improve the morphology of eutectic silicon. However, the production practice shows that the plasticity of the alloy is still difficult to meet the plastic d...

Claims

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Application Information

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IPC IPC(8): C22C21/04C22C1/03B23K35/02B23K35/28
CPCB23K35/0261B23K35/286C22C1/026C22C1/03C22C21/04
Inventor 赵九洲郑秋菊江鸿翔张丽丽何杰
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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