It was shown that by varying the relative motion of heated samples in water one can achieve very high cooling rates. A cooling rate of 7000 deg/sec at a depth of 1 mm can be attained in samples 6×6 ×8 mm.
The microhardness of low-carbon steel is increased by raising the cooling rate from 1000 to 7000 deg/sec during quenching.
In commercially pure iron (0.06% C) the increase in microhardness is accompanied by an increase in microdeformation and refining of the mosaic blocks; in steel with 0.15% C one observes only refining of the blocks, while the microdeformation decreases.
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L. I. Lysak, Problems of Physics of Metals and Metal Science [in Russian], Izd. Akad. Nauk UkrSSR, No. 5 (1954).
L. I. Lysak, Problems of Physics of Metals and Metal Science [in Russian], Izd. Akad. Nauk UkrSSR, No. 6 (1955).
Dnepropetrovsk State University. Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 4, pp. 73–74, April, 1967.
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Vorob'ev, G.M., Siukhin, A.F. & Popova, V.I. Effect of cooling rate on structure and hardness of quenched steel. Met Sci Heat Treat 9, 325–326 (1967). https://doi.org/10.1007/BF00652980
- Cool Rate
- Relative Motion
- Cooling Rate
- Pure Iron