White SParks 'Wakibana' in Flame as a Sign of Welding of Tatara Steel

摘要

"Tsumiwakashi Tanren" is forge-and-welding of steel Pieces that are Produced by Tatara and a steel block is formed. "Orikaeshi Tanren" is forge-and-welding of steel Plates. When JaPanese blacksmith finds "Wakibana", as shown in Figure 1, that is strong bright sParks in fire flame from charcoal, he takes out steel blocks on a anvil and forges them to weld by hammering. Steel block is covered with straw ash and mud and is heated in blacksmith's furnace. When the temPerature of steel block increased over 1100℃, the fire flame of charcoal colored yellow and orange.