The purpose of this study was to study the history of traditional Japanese trowel process. The research study were conducted the trowel blade which was made from SK5 steel. Microstructure and grain sizes were accurately measured by using the optical microscope (OM). The resultant microstructures of hardening were observed as martensite. After the tempering process, the result of microstructure found the temper-martensite structure. In the hardening process was heated up 800–850°C to austenite structure and quenched in cooling oil. Moreover, in the annealing process was quenched into straw ashes for cooling after heat up until 750°C. All heat treatment temperature and surface quality were observed and controlled by eyesight and experience of Japanese expert.

This content is only available via PDF.
You do not currently have access to this content.