Development of Direct Quenching Method for Steel Plates

Abstract

Experimental studies have been made of the direct quenching method for steel plates, which demonstrate that slit jet cooling followed by pipe laminar cooling is most suitable for the upper surface of a steel plate, while slit jet cooling followed by spray cooling is useful for the bottom surface.
A new water cooling equipment for direct quenching, designed without upper rollers, has been developed and added to the existing controlled cooling facility at Kobe Steel's Kakogawa Works. Production of SM58Q-grade steel plates made from Si-Mn-V steel of low carbon equivalent (0.37%) shows that the new water cooling equipment is highly effective for making high-strength steel plates with good flatness and mechanical properties.