When welding condition of the welding equipment which possesses the welding temperature supervisory function of the preferential

摘要

PROBLEM TO BE SOLVED: To surely prevent a welding break on a continuous strip treatment line having a furnace by setting a welding condition of a welding device being equipped with a welding temperature monitoring function in a way that the welding temperature is made to be in a range where a required welding strength can be obtained, wherein a welding success or failure can be surely judged based on the welding temperature. ;SOLUTION: When setting a welding condition of a welding device having a temperature monitoring function on a continuous strip treatment line being equipped with a furnace, the welding condition is set so that the welding temperature becomes in a range where a nugget ratio to be defined by the following formula is 40-60%. In this case, a nugget ratio = Ln/L. (L: a joining face length of the welding part, Ln: a nugget length on the joining face) Also, the welding temperature wherein the nugget ratio becomes in a range of 40-60% is decided based on the thickness of a steel belt.;COPYRIGHT: (C)2000,JPO