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Kinetics of hardened layer formation with induction hardening
Metal Science and Heat Treatment, 2010The kinetics of martensitic transformation of roll steels with induction heating by a current of industrial frequency are studied. It is shown that martensitic transformation proceeds autocatalytically. The time dependence of the amount of martensite with decomposition of supercooled austenite is established.
A. A. Polushin +3 more
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Distortion in Induction-Hardened Cylindrical Part
Defect and Diffusion Forum, 2019This article concerns distortion of a workpiece after induction-hardening under various conditions. It focuses particularly on the effects of quenching water temperature, PAG polymer concentration and the rotation speed of the workpiece during induction hardening.
Hájek, Jiří +2 more
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Measurement of Induction-Hardening Depth
2003In case of inhomogeneous materials, the resonance frequency is governed by the elastic constants and density at the positions of maximum stress and amplitude, respectively, which locate in the medium, depending on the individual resonant mode. Different resonant modes provide the information on the elastic property at different positions, and the ...
Masahiko Hirao, Hirotsugu Ogi
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Steels with controlled hardenability for induction hardening
Metal Science and Heat Treatment, 1980Steels of the CH and LH type developed in the Soviet Union permit the use of a new method of induction hardening — bulk-surface hardening — and efficient utilization of the high-strength conditions (σb = 230–250 kgf/mm2). These steels make it possible to improve the structural strength, operating characteristics, service life, and reliability of ...
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Induction case hardening of steel
Journal of Heat Treating, 1986It is shown that if one measures the coil current, Ic, during induction case hardening of steel a distinct break in the slope of the Ic vs. time curve is found. Experimental and theoretical results are presented which show that the break occurs at the ferromagnetic to paramagnetic transition.
J. D. Verhoeven +2 more
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Structure and properties of hardened steel layer in induction hardening
Metal Science and Heat Treatment of Metals, 19621. Superhardness obtained during high-frequency quenching is not due to any specific feature of the martensite structure, but to the high cooling rate of the thin, induction-heated layers. A uniformly high cooling rate during hardening produces the same hardness both after furnace and induction heating. 2.
K. Z. Shepelyakovskiy +2 more
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2008
Abstract Induction heating, in most applications, is used to selectively heat only a portion of the workpiece that requires treatment. This chapter covers the basic principles, features, and metallurgical aspects of induction heating. The discussion includes the conditions required for induction heating and quenching, the use of magnetic
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Abstract Induction heating, in most applications, is used to selectively heat only a portion of the workpiece that requires treatment. This chapter covers the basic principles, features, and metallurgical aspects of induction heating. The discussion includes the conditions required for induction heating and quenching, the use of magnetic
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Nondestructive Determination of the Hardening Depth in Inductive Hardened Steels
1994In industrial quality control the inspection of hardness and hardness depth is carried out destructively with the help of hardness measurements and metallographic techniques. These techniques are time consuming and therefore not suitable for on-line processing.
I. Altpeter, M. Kröning
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Breakthrough in Induction Hardening Shafts
Heat Treating Conference, 2015Abstract This presentation reviews selected innovations related to induction hardening of various automotive powertrain transmission and engine components, including but not limited to induction surface hardening of complex geometry shafts. Thanks to several innovative designs (patented and patent pending), important goals were achieved.
Valery Rudnev +3 more
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2005
Abstract Induction and flame hardening are methods of hardening the surfaces of components, usually in selected areas, by the short-time application of high-intensity heating followed by quenching. These processes are used when gear teeth require high hardness, but size or configuration does not lend itself to carburizing and quenching ...
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Abstract Induction and flame hardening are methods of hardening the surfaces of components, usually in selected areas, by the short-time application of high-intensity heating followed by quenching. These processes are used when gear teeth require high hardness, but size or configuration does not lend itself to carburizing and quenching ...
openaire +1 more source