Abstract
In the paper some phenomena of physics taking place during quenching steel in liquid media is widely discussed. It is shown that a double electrical layer is responsible for unknown impulse like effect constantly observed during quenching probes in electrolytes. It can be used for transient nucleate boiling process evaluation that is a basis for designing intensive quenching technology known as IQ-2 process. Early published phenomena of physics such as a poker effect, two stage cooling, and optimal concentration of electrolytes have the common nature – free electrons in metal. The observed phenomena of physics can be governed by hyperbolic heat conductivity equation with the appropriate initial and boundary conditions instead of parabolic heat conductivity widely used equation. At present time, fortunately, mathematicians started seriously investigations in this area by solving hyperbolic heat conductivity equations which can release in the future more new unknown phenomena to be widely used in the practice.
Highlights
The paper discusses physical processes taking place during quenching steel in liquid media such as film and nucleates boiling modes, behavior of free electrons in metal during quenching, double electrical layer, thermal waves, and others [1,2,3]
Based on modified law of Fourier and hyperbolic heat conductivity equation, the paper discusses some physical phenomena taking place during quenching steel parts and probes in water salt solutions known as electrolytes
During immersion of heated metal into cold electrolytes some new phenomena of physics are observed and cooling process is governed in this case by hyperbolic heat conductivity equation with the appropriate initial and boundary conditions
Summary
The paper discusses physical processes taking place during quenching steel in liquid media such as film and nucleates boiling modes, behavior of free electrons in metal during quenching, double electrical layer, thermal waves, and others [1,2,3]. During hardening steel parts from high temperatures (800–900 oC) in liquid media three stages of heat transfer occur (Fig. 1, a). These stages reflect three different cooling mechanisms that occur during the quenching of hot metals. Stage B, or transient nucleate boiling stage begins This cooling mechanism is characterized by violent boiling at the metal surface. The aim of the paper is considering hardening processes from the point of view of physics to make existing intensive quenching (IQ) processes more effective and inexpensive
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