TEMPER COLOR. A thin, tightly adhering oxide skin that forms when steel is tempered at a low temperature, or for a short time, in air or a mildly oxidizing atmosphere. The color, which ranges from straw to blue depending on the thickness of the oxide skin, varies with both tempering time and temperature.
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WATER QUENCHING. A quench in which water is the quenching medium. The major disadvantage of water quenching is its poor efficiency at the […]
ULTIMATE STRENGTH. The maximum conventional stress (tensile, compressive or shear) that a material can withstand.
THERMAL STRESS. Stresses in metal resulting from non-uniform temperature distribution.
SURFACE HARDENING. A generic term covering several processes applicable to a suitable ferrous alloy that produces, by quench hardening only, a surface layer […]