Spray Quenching Of Specimen For
Ring Heat Treatment
Author(s)
P. Stark, S. Schuettenberg & U. Fritsching
Abstract
The quenching process of metallic workpieces within manufacturing and heat
treatment can be optimized by applying locally and temporally adapted
quenching cooling conditions. Locally variable heat transfer conditions at the
workpiece surface are realizable by the regulation of adjustable and flexible flow
fields on the basis of impinging spray or jet flows. For the analysis of heat
treatment, the heat transfer rates with respect to the applied flow parameters and
their influence on the cooling conditions are described. The simulation is assisted
by experimental analysis of impinging multiphase jets and sprays.
Keywords: spray cooling, quenching, heat treatment, heat transfer coefficient.
1 Introduction
A main step in the manufacturing process of e.g. machine and gear components
is the heat transfer process. Large metallic rings are used in many technical
applications. Due to their function as a main component of bearings high
demands on material quality and precision are made during the production
process. Large distortion and/or shape deviation occur during the process steps
of heating, rolling and quenching that commonly require material allowance to
enable an additional reworking process.
Thus, a new approach to minimize the occurring distortion has been
developed in which the heat necessary for the forming process shall be used to
compensate the distortion during quenching within the hardening process. The
minimization and compensation of workpiece distortion can be realized by
impressing asymmetric cooling conditions by the use of flexible flow fields
based on liquid jets or sprays. Especially the cooling by two phase sprays of gas
Keywords
spray cooling, quenching, heat treatment, heat transfer coefficient
Related Book
Other papers in this volume
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