| 摘要 |
PURPOSE:To perform titled welding which suppresses generation of flash and improves weldability by specifying the ratio of the superposing width of steel plates with respect to the thickness of the material when the thickness range of the steel plate with which a metal and intermetallic compd. harder than tin exist as a coating layer is specified. CONSTITUTION:Seam welding of a steel plate which has the above-described coating layer and is known thus far to be impossible to weld, for example, tin- free steel, is performed under the following conditions: The superposing width of the steel plate is regulated to 2.0-2.4 times the thickness of the material when the thickness of the steel plate is in the range of 0.2-0.5mm.. As a result, the adequate current range for hardly weldable material is expanded by an electric resistance seam welding method. The production of a welded can by using a material such as, for example, tin-free steel, which is not thus far used for a can for food canning is thus made possible.
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