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explosion welding
Explosion welding (EXW) is a solid state (solid-phase) process where welding is accomplished by accelerating one of the components at extremely high velocity through the use of chemical explosives. This process is most commonly utilized to clad carbon steel plate with a thin layer of corrosion resistant material (e.g., stainless steel, nickel alloy, titanium, or zirconium). Due to the nature of this process, producible geometries are very limited. They must be simple. Typical geometries produced include plates, tubing and tubesheets.
== Development ==
Unlike other forms of welding such as arc welding (which was developed in the late 19th century), explosion welding was developed relatively recently, in the decades after World War II. Its origins, however, go back to World War I, when it was observed that pieces of shrapnel sticking to armor plating were not only embedding themselves, but were actually being welded to the metal. Since the extreme heat involved in other forms of welding did not play a role, it was concluded that the phenomenon was caused by the explosive forces acting on the shrapnel. These results were later duplicated in laboratory tests and, not long afterwards, the process was patented and put to use.
In 1962, DuPont applied for a patent on the explosion welding process, which was granted on June 23, 1964 under US Patent 3,137,937〔(【引用サイトリンク】url=http://www.freepatentsonline.com/3137937.html )〕 and resulted in the use of the ''Detaclad'' trademark to describe the process. On July 22, 1996, Dynamic Materials Corporation completed the acquisition of DuPont's Detaclad operations for a purchase price of $5,321,850.
Recently, the response of inhomogeneous plates undergoing explosive welding was analytically modeled.〔Bisadi, H., Khaleghi Meybodi, M., http://pic.sagepub.com/content/225/11/2552.short〕
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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