SIMULATION OF THE COOLING OF A WATER-QUENCHED 4-INCH-THICK PLATE.
UNITED STATES STEEL CORP PITTSBURGH PA
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Because the properties of submarine-hull steels must be determined in plate thicknesses through 4 in., and because 4-in. thick plates cannot be satisfactorily produced from small-size laboratory heats of steel, a technique was required that would permit simulation of the cooling at the midthickness of water-quenched 4-in. thick plates in a light-gage plate, perferably 12 in. thick. A centrifugal-blower and wind-channel arrangement was devised that cooled 12-in. thick plates from 1500 to 400 F in 7 to 8-12 minutes for the extremes of the possibile experimental cooling conditions. When the mechanical properties and microstructure of 12-in. thick plates of HY-80 steel, cut from the center of a 4-in. thick plate and blower-cooled after austenitizing, were compared with those at the midthickness of the 4-in. thick water-quenched plate, the results indicated that the blower-cooled plate had cooled only slightly slower than the midthickness of the 4-inch-thick plate. Author