Novel process of liquid phase impact diffusion welding for aluminium-based composite material

Abstract

The invention proposes a new aluminium compound material liquid phase impacting diffusion welding process which belongs to diffusion welding technology field. The invention solves the low quality of aluminium compound material diffusion welding. The invention mainly includes: the welding thermal reservation selection is in the aluminium compound material liquid and solid phase temperature period, in the temperature range whose liquid phase volume piece-rate is 20-35% correspondent to the base body liquid phase, the thermal reservation time is 30 seconds, at first applies initial welding pressure is 5MPa, the impacting pressure is 80-120MPa, the impacting speed is applied after the welding temperature thermal reservation for 5-10 seconds, the impacting temperature is 350-700mm/s. the impacting allying time interval is 0.0001-0.01 seconds. The invention applies to aluminium compound material made up of aluminum material 6061, 6063, 2014, 2A12, 5A06, 6A02, 7A04, ZL101, ZL102 and enhancing material SiC, Al2O3, TiC, AIN.

Description

technical field [0001] The new process of liquid-phase impact diffusion welding of aluminum-based composite materials proposed by the invention belongs to the technical field of metal diffusion welding technology; in particular, it relates to the diffusion welding connection technology of aluminum-based composite materials. Background technique [0002] Due to its excellent comprehensive performance, aluminum matrix composites have considerable application and huge potential application value in aerospace, aviation, military and civil fields. The research on its weldability has attracted great attention from my country and the world. However, The physical and chemical properties of the two materials that make up the aluminum matrix composite—the aluminum base material and the reinforcing material—are quite different, resulting in poor weldability. [0003] Some people use the aluminum alloy matrix of the aluminum matrix composite material as the intermediate layer for diffusi...

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Problems solved by technology

[0007] The main problem of the diffusion welding method of aluminum matrix composite materials proposed by the invention patent No. 00107203.X is that the welding time is 30 minutes, and the welding time is relatively long. The long welding time not only costs a lot of welding equipment and energy, but also takes a long time. Welding is also unfavorable to the structure of the joint, often prone to harmful phases, affecting the quality of the joint, and it is difficult to continue to improve the final joint strength

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