5-8 September 2022
Wyndham Grand Salzburg Conference Center
Europe/Vienna timezone

An Overview of Researches and Standardization Activities on Test Systems for Quenchant Characterization in Japan

8 Sep 2022, 09:50
Room 1

Room 1

Oral Presentation Session in memoriam of Sören Segerberg HEAT TREATMENT


Kyozo ARIMOTO (Arimotech Ltd.)


Researches and standardization activities for establishing the quenchant characterization test have been carried out in many countries for a long time. As a result, ISO 9950 using Inconel 600 rod probe was established internationally in 1995. However, there has not been much commentary on the works in Japan, and this paper aims to improve the situation. Past studies on the test systems in Japan are described, which use probes of the Fe-Cr-Ni alloy rod by Sato in the 1930s, the chromel-alumel ball by Tawara in the 1940s, and the silver rod by Tagaya and Tamura in the 1950s. The test devised by Tagaya and Tamura were adopted in JIS K 2526 in 1965 and incorporated into JIS K 2242 for heat treating oils in 1980. On the other hand, the Technical Barriers to Trade Agreement established by the World Trade Organization came into effect in 1995 in order to promote smooth global trade. As part of the response to this, the revised JIS K2242 added a provision on the probe with a thermocouple installed in the center in 2006. When conducting heat treatment simulation, the heat transfer coefficient is needed to specify at surfaces of the heat-treated object model. IFHTSE launched the Liquid Quenchant Database project for obtaining this coefficient in 2010. The activities for the project were carried out in Japan. Since the concept of JIS K 2242 was established a long time ago, there are some absences of provisions such as for the cooling rate curve, the maximum cooling rate and the temperature at which the maximum cooling rate occurs. Resolution of such inconsistencies with ISO 9950 is a future issue.

Register for the Tom Bell Young Author Award (TBYAA)? No
Speaker Country Japan

Primary authors

Kyozo ARIMOTO (Arimotech Ltd.) Prof. Mitsuyoshi SHIMAOKA (National Institute of Technology, Nara College)

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