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Abstract

Induction surface hardening means the hardening of a thin zone of the material only, while its core remains soft. The paper deals with the modelling of the Consecutive Dual Frequency Induction Hardening (CDFIH) of gear wheels and its validation. For gear wheels with modulus m smaller than 6 mm a contour profile of hardness distribution could be obtained. The investigated gear wheel is heated first by a medium frequency inductor to the temperature approximately equal to the modified lower temperature Ac1m. It means beginning of the austenite transformation. Then the gear wheel is heated by the high frequency inductor to the hardening temperature making it possible to complete the austenite transformation and immediately cooled. In order to design the process it is necessary to identify modified critical temperatures and to obtain expected temperature distribution within the whole tooth.

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Authors and Affiliations

Jerzy Barglik
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Abstract

Electromagnetic processing of molten copper is provided in a special kind of electrical furnace called an induction furnace with a cold crucible (IFCC), making it possible to successfully remove impurities from the workpiece. In order to analyze the process in a sufficient way not only electromagnetic, thermal and flow but also metallurgical and mass transfer phenomena in the coupled formulation should be taken into consideration. The paper points to an analysis of the kinetic process of lead evaporation from molten copper. It was shown that mass transport in the gas phase determines the rate of the analyzed evaporation process. The possibility of removal of lead from molten copper is analyzed and described.
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Authors and Affiliations

Albert Smalcerz
1
ORCID: ORCID
Leszek Blacha
1
ORCID: ORCID
Jerzy Barglik
1
ORCID: ORCID
Ivo Dolezel
2
ORCID: ORCID
Tadeusz Wieczorek
1
ORCID: ORCID

  1. Silesian University of Technology Krasinskiego 8, 40-019 Katowice, Poland
  2. Faculty of Electrical Engineering, University of West Bohemia Univerzitní 26, 301 00 Pilsen, Czech Republic

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