溶融亜鉛めっき槽用鋼板溶接継手部の強度・信頼性(その1) : 溶接部の高温強度と溶融亜鉛脆化特性

概要

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This study was carried out to select suitable welding methods and welding consumables used for constructing a galvanizing bath. In this report, these were selected from a view point of elevated temperature strength and the susceptibility of liquid metal embrittlement in liquid zinc. The base metal used was a carbon steel specialized for a galvanizing bath. The shielded metal arc (SMA) and gas shield arc weldings (GMA) were used with a covered electrode (E1) and solid and flux cored wires (F1, F2 and F3). Elevated temperature strength of all deposited metals were measured at the temperature range of room temperature to 600℃. Moreover, the notched bar tensile (NBT) test, where the bottom of notch was coated by liquid zinc, was performed at the temperature of 480℃ to know the susceptibility of liquid metal embrittlement. Strength at the elevated temperature of deposited metals by GMA welding was higher than that by SMA welding. The susceptibilities of liquid metal embrittlement of deposited metals became high in the order of E1, F1, F3 and F2. The susceptibilities of F1 and F3 were almost corresponded with that of the base metal. The susceptibility of liquid metal embrittlement at liquid zinc increased with an increase in the term of C+Si+Mn. From the results, welding wire, F3 was selected as a candidate of welding consumable used for constructing a galvanizing bath.
社団法人日本船舶海洋工学会の論文
1999-09-04