Metal treatment – Process of modifying or maintaining internal physical... – Heating or cooling of solid metal
Patent
1998-07-27
2000-08-08
Jenkins, Daniel J.
Metal treatment
Process of modifying or maintaining internal physical...
Heating or cooling of solid metal
148500, 148503, 148511, 148559, 148579, 148637, 148638, 148660, 148661, 266130, 266131, C21D 164
Patent
active
060996668
ABSTRACT:
A variable rate quench system allows the cooling of a heated workpiece to be controlled more closely. A liquid quenchant used in the system has an initial temperature, density and heat extraction index. The system comprises a first tank containing the liquid quenchant and to receive the workpiece and a second tank communicated to the first tank. The first tank has a means for agitating the liquid quenchant around the workpiece and a supply of make-up liquid quenchant communicated thereto. The second tank has a slurry of a non-liquid solid phase quenchant modifier and a means for selectively controlling addition of the slurry to the first tank. A real time data acquisition system acquires and analyzes temperature, density and agitation rate of the liquid quenchant, calculates an instantaneous heat extraction index of the liquid quenchant and compares the difference between the calculated index and a predetermined ideal index. Corrective action to minimize the difference is then taken. The first tank is also provided with a means for cycling a portion of the quenchant in the first tank through a heat exchanger external to the first tank to maintain the tank in an isothermal condition.
REFERENCES:
patent: 3963535 (1976-06-01), Lineberg
patent: 4419149 (1983-12-01), Day
patent: 4596612 (1986-06-01), Fradique
patent: 5094702 (1992-03-01), Kothmann et al.
patent: 5529290 (1996-06-01), Drager
patent: 5795538 (1998-08-01), Abukawa et al.
patent: 5891275 (1999-04-01), Elfmark et al.
Coy Nicole
Jenkins Daniel J.
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