IMPROVEMENT OF IQ - 3 PROCESSES TO ELIMINATE CRACK FORMATION, DECREASE DISTORTION, AND MAXIMIZE MATERIAL STRENGTH, AND DUCTILITY

  • Nikolai Kobasko Intensive Technologies Ltd, Ukraine
Keywords: direct convection, IQ-3 process, distortion, crack formation, ductility, strength, calculations

Abstract

The paper presents an overview and significant improvement of one of the intensive quenching processes (namely, the IQ-3 process). The IQ-3 process is an interrupted quench method that is usually implemented in high-velocity single-part quenching IQ units. The IQ-3 process is often called a direct convection quenching since, due to a very high water flow rates through the quench chamber, both the film boiling process and the nucleate boiling process are eliminated completely, and convention process starts immediately after beginning of the quench. Different criteria of the IQ-3 process interruption are considered. Normally, the IQ-3 process is interrupted at a time when current surface compressive stresses are at their maximum value. After a conventional IQ-3 process, there is a mixed structure in the part core. The paper focuses on the IQ-3 method that provides a bainitic structure in the part core. A method for calculation of a required water flow rate for high-velocity IQ systems for providing the bainitic part core structure is discussed. 

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Published
2016-08-06
How to Cite
Kobasko, N. (2016). IMPROVEMENT OF IQ - 3 PROCESSES TO ELIMINATE CRACK FORMATION, DECREASE DISTORTION, AND MAXIMIZE MATERIAL STRENGTH, AND DUCTILITY. EUREKA: Physics and Engineering, (4), 3-10. https://doi.org/10.21303/2461-4262.2016.000122
Section
Chemical Engineering

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