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Translated Articles

Short time resistance spot welding of 1.2Gpa ultra-high strength steel using high frequency power supply

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Abstract

The task of 1.2 GPa ultra-high strength steel sheet in short time’s high current spot welding has been clarified. High current and short time spot welding system and high frequency power supply has been developed. In order to prevent spatter, new dual-pulse welding method in which primary energization, cooling and secondary energization has been proposed. By using this novel welding method, nugget diameter and tensile shear strength satisfied the target and spatter did not occur. New method of 1.2 GPa ultra-high strength steel sheet in short time and high current spot welding has been established.

Additional information

Funding

This research was commissioned by the New Energy and Industrial Technology Development Organization (NEDO) under the auspices of the Institute of Structural Materials for Advanced Materials (ISMA) of the New Energy and Industrial Technology Development Organization (NEDO).

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