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Method of bonding different metals and bonded structure

A technology of dissimilar metals and joining methods, applied in the direction of metal layered products, metal processing equipment, chemical instruments and methods, etc., can solve the problems such as the difficulty of direct joining of materials, and achieve the effect of firm joining

Active Publication Date: 2010-12-15
NISSAN MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In addition, since the Fe-Mg binary phase diagram shows a two-phase separation type, the solid solubility limit of each other is also very small, so it is extremely difficult to directly bond materials with this characteristic to each other in metallurgy

Method used

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  • Method of bonding different metals and bonded structure
  • Method of bonding different metals and bonded structure
  • Method of bonding different metals and bonded structure

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Embodiment

[0077] Hereinafter, the present invention will be specifically described based on examples.

[0078] When joining dissimilar metals between a magnesium-based material as a first material and steel as a second material, bare steel sheets and galvanized steel sheets coated with zinc (metal C) are used as steel materials. On the other hand, three types of magnesium alloys with different additions of pure magnesium and aluminum (metal D) were prepared as magnesium materials, these steel materials and magnesium materials were joined under various conditions, and the relationship between the obtained interface structure and strength was investigated.

[0079] Figure 12 It is a schematic diagram showing the structure of the bonding apparatus used in this embodiment. The bonding apparatus 20 shown in the figure is a general diffusion bonding apparatus, and has a heating furnace 21 and a temperature control device 22 for adjusting the temperature of the atmosphere in the heating furna...

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Abstract

A magnesium alloy material (1) (first material) is bonded to a steel material (second material). The steel material to be used is a galvanized steel plate (2), which has a deposit of zinc (metal (C)); and the magnesium alloy material (1) contains aluminum (metal (D)). In bonding the two materials, a magnesium-zinc eutectic melt is generated and the melt is discharged from the bonding interface together with an oxide coating film (1f), impurities, etc. Simultaneously therewith, an aluminum-magnesium intermetallic compound such as Al3Mg2 and an iron-aluminum intermetallic compound such as FeAl3 are generated. Thus, newly formed surfaces of the two materials (1) and (2) are bonded to each other through a compound layer (3) containing these intermetallic compounds.

Description

technical field [0001] The present invention relates to a joining method of dissimilar metals, such as a combination of steel and a magnesium alloy material, which has an oxide film on the joining surface and is difficult to directly join metallurgically, and a joining structure of dissimilar metals joined by this method. Background technique [0002] When joining dissimilar metals, such as a combination of a magnesium alloy material and a steel material, there is an oxide film on the surface of the magnesium alloy material and the oxide film on the steel surface grows during the heating process at the time of joining. , bonding in the atmosphere becomes difficult. [0003] In addition, since the Fe-Mg binary phase diagram shows a two-phase separation type, the solid solubility limit of each other is also very small, so it is extremely difficult to directly bond materials with this characteristic to each other in metallurgy . [0004] Therefore, conventionally, when such d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K20/00B23K20/227B32B15/01C23C30/00B23K103/18C22C18/04C22C23/02
CPCC22C18/04B23K2203/18B32B15/013C22C23/02B23K1/19B23K11/115B23K11/16B23K11/3009B23K13/00B23K20/02B23K20/10B23K20/122B23K20/227B23K26/323B23K26/21B23K2103/15B23K2103/18Y10T428/12681Y10T428/12757Y10T428/12729
Inventor 中川成幸宫本健二粕川实相原政夫柳田贞雄广濑明夫
Owner NISSAN MOTOR CO LTD
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