The Use of Water Spray Quenching for Long Steel Bars

As most steels must be cooled at controllable cooling rates, i.e., rapidly at the start of quenching and slowly at the finish for minimum distortion and cracking, liquids with relatively high boiling points and low specific heats are often desirable especially when dealing with long round bars where low-distortion quenching is so important. Oils and polymeric solutions often satisfy these requirements more closely than water. However, these …