The explosion effect has an effect on the mechanical properties of the steel matrix of the aluminum-steel transition insert. The impact test shows that the upper limit of impact value decreases obviously, the average shear value is low, and the brittle transition temperature increases compared with that before explosion. These phenomena are obvious with the increase of explosive layer thickness. Tensile tests show that the strength increases and the shape decreases. Hardness tests showed that Vickers hardness was submitted from 141 to 185 before welding. There were intermetallic compounds at the interface.
The explosive welding method can be used to manufacture the ladle aluminium conductor for aluminium electrolysis. This process can save man-hours, non-ferrous metals and filling materials.
Explosive welding is suitable for the welding of titanium, lead, copper, nickel and steel, aluminum and steel, and two or more dissimilar metals. It is not suitable for brittle metals such as cast iron and zinc. Among them, aluminium alloy-titanium-low carbon steel (stainless steel) three-layer clad materials have been widely used in the cabins, side walls, masts and liquefied natural gas tanks of frigates and other ships. The interface resistance of Al-low carbon steel clads is close to zero and is used as a confluent. Aluminum cladding on the outer side of steel pipe is used to make refrigeration equipment and piping for fishing boats. Aluminum-copper clads for conductive purposes are used as confluence bars and transformers, etc. Aluminum-steel transition insert for refrigeration storage is mainly used as pipe joint of compressor. The aluminium alloy-aluminium-titanium-nickel-stainless steel five-layer clad plate for ultra-low temperature is used as storage tank and piping of liquid ammonia, liquid nitrogen, liquid hydrogen and liquefied natural gas. Their strength and thermal stability are good.
