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Volume 9
Issue 4
10.3390/met9040439
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Article

Calculation of the Mixture Flow in a Low-Pressure Carburizing Process

by
Emilia Wołowiec-Korecka
1,*,
Maciej Korecki
2,
Michał Sut
2,
Agnieszka Brewka
2 and
Piotr Kula
1
1
Institute of Materials Science and Engineering, Lodz University of Technology, 1/15 Stefanowskiego Street, 90-924 Lodz, Poland
2
Seco/Warwick S.A., 8 Sobieskiego Street, 66-200 Świebodzin, Poland
*
Author to whom correspondence should be addressed.
Metals 2019, 9(4), 439; https://doi.org/10.3390/met9040439
Submission received: 19 March 2019 / Revised: 10 April 2019 / Accepted: 11 April 2019 / Published: 15 April 2019
(This article belongs to the Special Issue Surface Treatment Technology of Metals and Alloys)
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Abstract

The right selection of carburizing gas flow rates in the low-pressure carburization process is a key factor in terms of its efficiency. However, a correct calculation of the amount of carburizing gas required for uniform carburization of parts, taking into account the process temperature and batch size, is still problematic. For this reason, modern carburizing processes are carried out using an excessive belaying flow of carburizing gases. In this work steel parts (16MnCr5) were carburized in a variable-flow carburizing process (960 °C) individually matched to each segment of saturation. The effect of the variable-flow on the microstructure, surface hardness, and case hardness depth was evaluated and compared to that of a control group. It was proven that the amount of the mixture used in the variable-flow carburizing process can be significantly reduced to 54% of that consumed during the regular constant-flow carburizing without affecting the properties of the hardened layer of the steel parts.
Keywords: carburizing mixture flow; low-pressure carburizing; vacuum carburizing carburizing mixture flow; low-pressure carburizing; vacuum carburizing

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MDPI and ACS Style

Wołowiec-Korecka, E.; Korecki, M.; Sut, M.; Brewka, A.; Kula, P. Calculation of the Mixture Flow in a Low-Pressure Carburizing Process. Metals 2019, 9, 439. https://doi.org/10.3390/met9040439

AMA Style

Wołowiec-Korecka E, Korecki M, Sut M, Brewka A, Kula P. Calculation of the Mixture Flow in a Low-Pressure Carburizing Process. Metals. 2019; 9(4):439. https://doi.org/10.3390/met9040439

Chicago/Turabian Style

Wołowiec-Korecka, Emilia, Maciej Korecki, Michał Sut, Agnieszka Brewka, and Piotr Kula. 2019. "Calculation of the Mixture Flow in a Low-Pressure Carburizing Process" Metals 9, no. 4: 439. https://doi.org/10.3390/met9040439

APA Style

Wołowiec-Korecka, E., Korecki, M., Sut, M., Brewka, A., & Kula, P. (2019). Calculation of the Mixture Flow in a Low-Pressure Carburizing Process. Metals, 9(4), 439. https://doi.org/10.3390/met9040439

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