STRUCTURE OF HIGH-CARBON STEEL AFTER WELDING WITH RAPID COOLING

Authors

  • Yurii Kalinin PJSC Zaporozhtransformator, Zaporizhzhia
  • Michail Brykov Zaporizhia National Technical University, Zaporizhzhia
  • Ivan Petryshynets Institute of Materials Research Slovak Academy of Sciences, Košice
  • Vasily Efremenko Pryazovskyi State Technical University, Mariupol
  • Olaf Hesse Ernst-Abbe-Hochschule Jena, Jena
  • Maik Kunert Ernst-Abbe-Hochschule Jena, Jena
  • Michail Andrushchenko Zaporizhia National Technical University, Zaporizhzhia
  • Michail Osipov Zaporizhia National Technical University, Zaporizhzhia
  • Stanislav Berezhnyy Zaporizhia National Technical University, Zaporizhzhia
  • Oleg Bykovskiy Zaporizhia National Technical University, Zaporizhzhia

DOI:

https://doi.org/10.12776/ams.v25i2.1269

Keywords:

welding;, rapid cooling;, austenite;, martensite;, wear resistance;, high carbon low-alloyed steels

Abstract

In this paper the effect of rapid cooling during arc welding on the structure of fusion layer and heat affected zone (HAZ) of high-carbon low alloyed steel have been studied. The main idea was that despite of high carbon content (1.2%) it is necessary to achieve quenching in HAZ. Due to proper chemical composition of welded steel martensite start temperature Ms is about 20 oC, therefore austenitic structure of quenched metal is preserved after rapid cooling. Exposition of HAZ to excessive heat during welding cycle leads to local precipitation of carbides from austenite and thus raising of Ms. In this case some amount of martensite was present in structure after cooling along with austenite and carbides. Microstructure, microhardness and chemical composition of remelted electrode metal, fusion zone and HAZ were studied by means of optical microscopy, SEM, EDX and microhardness testing.

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Published

2019-06-28

How to Cite

Kalinin, Y., Brykov, M., Petryshynets, I., Efremenko, V., Hesse, O., Kunert, M., Andrushchenko, M., Osipov, M., Berezhnyy, S., & Bykovskiy, O. (2019). STRUCTURE OF HIGH-CARBON STEEL AFTER WELDING WITH RAPID COOLING. Acta Metallurgica Slovaca, 25(2), 114–122. https://doi.org/10.12776/ams.v25i2.1269

Issue

Vol. 25 No. 2 (2019): Volume 25, No. 2, 2019

Section

Research papers

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