Impact of single-piece flow thermo-chemical treatment process conditions on hole quenching deformation

• Autorzy: Stachurski Wojciech , Sawicki J. , Zgórniak P. , Wołowiec-Korecka E.

Identyfikatory

DOI

10.5604/01.3001.0053.7476

• Języki publikacji: EN

Abstrakty

EN

Purpose: Pulsed low-pressure carburizing (LPC) and omnidirectional high-pressure gas quenching (HPGQ) are innovative methods for quenching the surface layer. The thermo-chemical treatment carried out by this method reduces quenching geometric deformations, with detailed numerical values not available in the literature due to the short existence of this method. Design/methodology/approach: Sixteen toothed elements of EN 20MnCr5 steel were subjected to pulsed low-pressure carburising with omnidirectional jet quenching in 4 groups, varying the process temperature (920°C, 960°C) and in two groups performing a tempering treatment. The elements were tested before machining by measuring their internal hole diameters, radial runout, roundness and cylindricity. These values were tested again after treatment. The direction of change and the statistical significance of the effect of treatment and its parameters, temperature and tempering were analysed. Findings: Thermo-chemical treatment significantly affects geometric changes in diameters, roundness, cylindricity and radial runout compared to elements without heat treatment due to physical transformations occurring during this treatment (p<0.05). Changing the process temperature in the value range of 920°C-960°C affects the hole diameter (makes it smaller) (p<0.05), but does not affect radial runout, cylindricity and roundness. The observed dimensional changes in diameters have numerically small values (<0.005 mm). The tempering treatment can affect the values of average diameters. Its effect on roundness, cylindricity and radial runout was not observed. Research limitations/implications: In the temperature range studied, the method of pulsed low-pressure carburising + omnidirectional high-pressure gas quenching makes it possible to raise the temperature of the process and shorten its duration without significant geometric changes in the treated elements. Practical implications: The method of pulsed low-pressure carburising and omnidirectional high-pressure gas quenching (HPGQ) ensures the maintenance of reproducible quenching deformations at a level significantly lower than conventional processing methods. Originality/value: The method of pulsed low-pressure carburising together with omnidirectional high-pressure gas quenching (HPGQ) is a method that has been used briefly in the industry, and there are few reports on it to date.

Słowa kluczowe

EN

distortion; quenching; single-piece flow method; case hardening; low-pressure carburising

PL

zniekształcenie; hartowanie; metoda przepływu jednoczęściowego; utwardzanie obudowy; nawęglanie niskociśnieniowe

• Wydawca: International OCSCO World Press
• Czasopismo: Archives of Materials Science and Engineering
• Rocznik: 2023
• Tom: Vol. 121, nr 1
• Strony: 18--24
• Opis fizyczny: Bibliogr. 11 poz.

Twórcy

autor

Stachurski Wojciech

• Institute of Machine Tools and Production Engineering, Lodz University of Technology, 1/15 Stefanowskiego St., 90-537 Łódź, Poland

• https://orcid.org/0000-0003-3936-6846

autor

Sawicki J.

• Institute of Material Science and Engineering, Lodz University of Technology, 1/15 Stefanowskiego St., 90-537 Łódź, Poland

autor

Zgórniak P.

• Institute of Machine Tools and Production Engineering, Lodz University of Technology, 1/15 Stefanowskiego St., 90-537 Łódź, Poland

autor

Wołowiec-Korecka E.

• Institute of Material Science and Engineering, Lodz University of Technology, 1/15 Stefanowskiego St., 90-537 Łódź, Poland

Bibliografia

• 1. M. Korecki, W. Fujak, J. Olejnik, M. Stankiewicz, E. Wołowiec-Korecka, Multi-chamber furnace from vacuum carburizing and quenching of gears, shafts, rings and similar workpieces, Patent US 9,989,311. United States, US 9,989,311, 2018.
• 2. M. Korecki, W. Fujak, J. Olejnik, M. Stankiewicz, E. Wołowiec-Korecka, Device for individual quench hardening of technical equipment components, Patent US 10,072,315. United States, US 10,072,315, 2018.
• 3. L.A. Dobrzański, Metals and alloys, Open Access Library, Annal VII(2), International OCSCO World Press, Gliwice, 2017 (in Polish).
• 4. E. Wołowiec-Korecka, M. Korecki, W. Stachurski, J. Sawicki, A. Brewka, M. Sut, M. Bazel, System of single-piece flow case hardening for high volume production, Archives of Materials Science and Engineering 79/1 (2016) 37-44. DOI: https://doi.org/10.5604/18972764.1227661
• 5. W. Stachurski, P. Zgórniak, J. Sawicki, M. Przybysz, Hardening-related deformations of gear wheels after vacuum carburizing and quenching in gas, Advances in Science and Technology Research Journal 11/1 (2017) 237-245. DOI: https://doi.org/10.12913/22998624/67673
• 6. E. Wołowiec-Korecka, W. Stachurski, P. Zgórniak, M. Korecki, A. Brewka, P. Byczkowska, The influence of quenching temperature on distortions during the individual quenching method, Archives of Materials Science and Engineering 105/2 (2020) 80-85. DOI: https://doi.org/10.5604/01.3001.0014.5764
• 7. M. Korecki, E. Wołowiec-Korecka, M. Sut, A. Brewka, W. Stachurski, P. Zgórniak, Precision case hardening by low pressure carburizing (LPC) for high volume production, HTM Journal of Heat Treatment and Materials 72/3 (2017) 175-183. DOI: https://doi.org/10.3139/105.110325
• 8. M. Korecki, E. Wołowiec-Korecka, D. Glenn, Single-piece, high-volume, low-distortion case hardening of gears, Proceeding of AGMA Fall Technical Meeting 2015, AGMA, Detroit, 2015, 1-9.
• 9. J. Sawicki, K. Krupanek, W. Stachurski, V. Buzalski, Algorithm scheme to simulate the distortions during gas quenching in a single-piece flow technology, Coatings 10/7 (2020) 694. DOI: https://doi.org/10.3390/coatings10070694
• 10. K. Krupanek, J. Sawicki, V. Buzalski, Numerical simulation of phase transformation during gas quenching after low pressure carburizing. IOP Conference Series: Materials Science and Engineering 743 (2020) 012047. DOI: https://doi.org/10.1088/1757-899X/743/1/012047
• 11. A. Brewka-Stanulewicz, Impulse low-pressure carburizing for high efficiency production with continuous single-piece flow of the parts, PhD Thesis, Lodz University of Technology, Lodz, 2022 (in Polish).