Materials Science and Engineering
Physical Metallurgy Lab: Hardenability

Hardenability

Jominy End-Quench Test

The Jominy End-Quench test basically consists of heating a steel 1" diameter cylindrical sample to high temperature (the steel must be austenized), then placing in a holder and having cold water sprayed on one end. As the steel cools, it will form martensite close to the quenched end. Once the sample is fully cooled, a flat channel is ground into the side and hardness measurements taken according to ASDM standards. Care must be taken in grinding the channel as to not locally heat treat the steel.



Pulling sample of AISI 1018 from the furnace at 900° C

Waiting for the quench.

It's still hot. You can see the FeO scale forming on the outside

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