Abstract
Wear of the cylinder of the diesel engine is an important problem. The auther assured that quenching, chromium-plating and nitriding are most effective for its bearing. In this report the quenching conditions of cast iron experimentally determined and the quenched cylinders were driven. The results shows their wear-resistance becomes twice or three times as much as one of a common cylinder. The results of chromium-plating and nitriding will be found in the following report. (M. I.)
