Version 1
: Received: 21 December 2020 / Approved: 22 December 2020 / Online: 22 December 2020 (16:13:53 CET)
How to cite:
Barełkowski, A.; Kuziak, R. Development of a Technology of Isothermal Annealing With the Use of the Forging Heat for Chromium-Molybdenum Steel. Preprints2020, 2020120568. https://doi.org/10.20944/preprints202012.0568.v1
Barełkowski, A.; Kuziak, R. Development of a Technology of Isothermal Annealing With the Use of the Forging Heat for Chromium-Molybdenum Steel. Preprints 2020, 2020120568. https://doi.org/10.20944/preprints202012.0568.v1
Barełkowski, A.; Kuziak, R. Development of a Technology of Isothermal Annealing With the Use of the Forging Heat for Chromium-Molybdenum Steel. Preprints2020, 2020120568. https://doi.org/10.20944/preprints202012.0568.v1
APA Style
Barełkowski, A., & Kuziak, R. (2020). Development of a Technology of Isothermal Annealing With the Use of the Forging Heat for Chromium-Molybdenum Steel. Preprints. https://doi.org/10.20944/preprints202012.0568.v1
Chicago/Turabian Style
Barełkowski, A. and Roman Kuziak. 2020 "Development of a Technology of Isothermal Annealing With the Use of the Forging Heat for Chromium-Molybdenum Steel" Preprints. https://doi.org/10.20944/preprints202012.0568.v1
Abstract
The article discusses the results of investigations performed during a thermo-mechanical treatment of forgings made of chromium-molybdenum 42CrMo4 grade steel. The treatment was realized during a regular series production. The forging process was combined with a heat treatment carried out directly after forging on a specially adapted station. Such a production technology will make it possible to eliminate the step of repeated heating of the forgings. On the example of an element of a steering gear, it was demonstrated how it is possible to perform an isothermal annealing process starting from the temperature at which the trimming of the forgings ends. During the cooling of the forgings, it is enough to maintain the temperature at the proper level in order for the exothermal phase transformation of austenite into pearlite to take place. With an appropriate design of the processing line, the heat released during the transformation could be used to maintain the applied temperature, thus limiting the consumption of energy needed to power the devices. The test results show that, with the properly selected temperature of isothermal annealing, it is possible to obtain an equilibrial ferritic-pearlitic structure in the required hardness scope. Introducing such a solution into the industrial practice would allow significant savings of the energy used for the heat treatment.
Keywords
die forging; isothermal annealing; thermo-mechanical treatment
Subject
Engineering, Automotive Engineering
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
