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A metal-based nanocomposite welding wire and its preparation method

A nanocomposite material and metal-based technology, which is applied in the field of metal-based nanocomposite welding wire and its preparation, can solve the problems of high thermal cracking sensitivity, high thermal cracking tendency, and decreased mechanical properties, and achieve improved mechanical properties, thermal Low cracking tendency and excellent mechanical properties

Active Publication Date: 2020-04-24
迈特李新材料(深圳)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, alloys with high thermal cracking tendency, such as 2000 series (A206, A2024) and 7000 series (7075) high-strength aluminum alloys, have been widely used as structural parts due to their high thermal cracking tendency and poor welding formability. restrict
Alloys with a high hot cracking tendency often have a large number of hot cracking defects in the welded joint after welding: First, due to the wide solidification range of this type of alloy and high hot cracking sensitivity, the weld will produce a large number of solidification cracks during the solidification process; secondly , in the fusion zone, the melting of the eutectic phase with a low melting point at the grain boundary often produces liquefaction cracks
[0007] Adjusting the welding process parameters can reduce hot cracking to a certain extent, but the adjustment of the process parameters requires a lot of attempts, which is very time-consuming and has limited improvement effects; in addition, the decline in the mechanical properties of the fusion zone and heat-affected zone during welding is still unavoidable. avoid

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  • A metal-based nanocomposite welding wire and its preparation method
  • A metal-based nanocomposite welding wire and its preparation method

Examples

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Embodiment 1

[0040] This embodiment provides a method for preparing an aluminum-based nanocomposite welding wire, which includes the following steps:

[0041] S1) Select the target alloy and prepare the elemental components that make up the target alloy: the target aluminum alloy is AA7075 aluminum alloy, and the AA7075 series aluminum alloy contains the following elements in weight percentage: Zn 5.1%~6.1%, Mg2.1%~2.9%, Cu1.2%~2.0%, Cr 0.18%~0.28%, the rest is Al;

[0042] S2) Melting pure aluminum at 800°C to obtain molten aluminum; during the melting process, argon gas is introduced for protection;

[0043] S3) Add the mixture of salt and nano-reinforcement to the aluminum melt; when the salt melts, stir; the salt contains the components in weight percentage: 27% MgF 2 , 21%CaF 2 and 52% BaF 2 , the melting point of fluoride is 777°C; the nano reinforcement is TiC nanoparticles, the particle size of TiC nanoparticles is 40-60nm; the volume fraction of TiC nanoparticles in the mixture...

Embodiment 2

[0048] The present embodiment provides a kind of preparation method of magnesium-based nanocomposite welding wire, it comprises the following steps:

[0049] S1) Select the target alloy and prepare the elemental substances that make up the target alloy: the target alloy is a ZK60 magnesium alloy, and the ZK60 magnesium alloy contains the following elements in weight percentage: Zn 4.8% to 6.2%, Zr 0.45% to 1.0%, and the rest is Mg ;

[0050] S2) Melting pure magnesium at 750°C to obtain a magnesium melt; during the melting process, a mixed gas of carbon dioxide and sulfur tetrafluoride is introduced for protection;

[0051] S3) Add the mixture of salt and nano-reinforcement to the magnesium melt; when the salt melts, stir; the salt contains components in weight percentage: 54% KCl, 12% NaCl and 4% NaF, 30% CaCl 2 , the melting point of the salt mixture is 535°C; the nano-reinforcement is Al 2 o 3 Nanoparticles, Al 2 o 3 The particle size of nanoparticles is 30-50nm; Al 2...

Embodiment 3

[0056] The present embodiment provides a kind of preparation method of nickel-based nanocomposite welding wire, and it comprises the following steps:

[0057] S1) Select the target alloy and prepare the elemental substance of the target alloy: the target alloy is IN792 nickel alloy, and the IN792 nickel alloy contains the following elements in weight percentage: Cr 12.7%, Co 9.0%, Ti 4.2%, W 3.9%, Ta 3.9%, Al 3.2%, C 0.2%, Zr 0.1%, B 0.02%, the rest is Ni;

[0058] S2) Melting pure nickel at 1600°C to obtain a nickel melt; during the melting process, argon gas is introduced for protection;

[0059] S3) Add the mixture of salt and nano reinforcement to the nickel melt; when the salt melts, stir; the salt is CaF 2 , CaF 2 The melting point of the compound is 1418°C; the nano-reinforcement body is TiAl intermetallic compound nanoparticles, and the particle size of TiAl nanoparticles is 30-50nm; the volume fraction of nanoparticles in the mixture of salt and nanoparticles is 20%...

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Abstract

The invention discloses a preparation method for metal base nanometer composite material welding wires, and belongs to the field of metal material and welding material welding. Nanometer enhancing bodies are added in fused salt assisted alloys, in particular in alloys with high heat cracking tendency, to reduce the heat cracking tendency of the alloys; and prepared metal base nanometer composite material welding wires can be widely applied to similar welding of the alloys with high heat cracking tendency and dissimilar welding with other alloy series.

Description

technical field [0001] The invention belongs to the field of preparation of metal materials and welding materials, and in particular relates to a metal-based nanocomposite welding wire and a preparation method thereof. Background technique [0002] Due to their high strength and good fracture toughness, advanced metal materials have broad application prospects in aerospace, automotive and other industrial fields. However, alloys with high thermal cracking tendency, such as 2000 series (A206, A2024) and 7000 series (7075) high-strength aluminum alloys, have been widely used as structural parts due to their high thermal cracking tendency and poor welding formability. restrict. Alloys with a high hot cracking tendency often have a large number of hot cracking defects in the welded joint after welding: First, due to the wide solidification range of this type of alloy and high hot cracking sensitivity, the weld will produce a large number of solidification cracks during solidifi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/40B23K35/36B23K35/28B23K35/30
CPCB23K35/286B23K35/3033B23K35/3601B23K35/3603B23K35/3605B23K35/40
Inventor 李晓春刘伟清刘志威
Owner 迈特李新材料(深圳)有限公司
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