Hardness behavior of W. Nr. 1.7709 steel, oil quenched and tempered between 475°C and 575°C

Steel components frequently involve a heat treatment to improve mechanical properties. In order to meet difficult working conditions, several components are hardened by quenching. W. Nr. 1.7709 is a representative structural steel with very low thermal conductivity among EN wrought alloy steels, whi...

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Autores principales:	Mantzoukas John, Papageorgiou Dimitris G., Medrea Carmen, Stergiou Constantinos
Formato:	article
Lenguaje:	EN FR
Publicado:	EDP Sciences 2021
Materias:	Engineering (General). Civil engineering (General) TA1-2040
Acceso en línea:	https://doaj.org/article/76ade7ad9b584fdf81ea71fc488048b6
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spelling	oai:doaj.org-article:76ade7ad9b584fdf81ea71fc488048b62021-12-02T17:13:46ZHardness behavior of W. Nr. 1.7709 steel, oil quenched and tempered between 475°C and 575°C2261-236X10.1051/matecconf/202134902005https://doaj.org/article/76ade7ad9b584fdf81ea71fc488048b62021-01-01T00:00:00Zhttps://www.matec-conferences.org/articles/matecconf/pdf/2021/18/matecconf_iceaf2021_02005.pdfhttps://doaj.org/toc/2261-236XSteel components frequently involve a heat treatment to improve mechanical properties. In order to meet difficult working conditions, several components are hardened by quenching. W. Nr. 1.7709 is a representative structural steel with very low thermal conductivity among EN wrought alloy steels, which is extensively used after hardening and tempering. Although the steelmakers provide technical information about their heat treatment sequence, the tempering diagram of the specific grade has not been designed yet. The present paper analyses the temper resistance of the specific steel after oil quenching and tempering at high temperatures. Samples of identical chemical compositions were accordingly prepared and randomized. Five groups of ten specimens were austenitized at 960°C, hold for 30 minutes and were quenched in oil. They were tempered for two hours at different temperatures between 475°C and 575°C. Specific temperatures are interesting to the heat treaters, as they could allow certain transformations which take place during tempering. Hardness measurements were carried out and statistically processed. The tempering diagram was plotted to the specified temperature range. The influence of tempering temperature on steel hardness was analysed and the resistance to tempering back of the steel was discussed. The tempering diagram is critical for metallurgists as it represents a guide to define the proper tempering parameters so that the hardness predicted according to the mechanical property requirements are obtained.Mantzoukas JohnPapageorgiou Dimitris G.Medrea CarmenStergiou ConstantinosEDP SciencesarticleEngineering (General). Civil engineering (General)TA1-2040ENFRMATEC Web of Conferences, Vol 349, p 02005 (2021)
institution	DOAJ
collection	DOAJ
language	EN FR
topic	Engineering (General). Civil engineering (General) TA1-2040
spellingShingle	Engineering (General). Civil engineering (General) TA1-2040 Mantzoukas John Papageorgiou Dimitris G. Medrea Carmen Stergiou Constantinos Hardness behavior of W. Nr. 1.7709 steel, oil quenched and tempered between 475°C and 575°C
description	Steel components frequently involve a heat treatment to improve mechanical properties. In order to meet difficult working conditions, several components are hardened by quenching. W. Nr. 1.7709 is a representative structural steel with very low thermal conductivity among EN wrought alloy steels, which is extensively used after hardening and tempering. Although the steelmakers provide technical information about their heat treatment sequence, the tempering diagram of the specific grade has not been designed yet. The present paper analyses the temper resistance of the specific steel after oil quenching and tempering at high temperatures. Samples of identical chemical compositions were accordingly prepared and randomized. Five groups of ten specimens were austenitized at 960°C, hold for 30 minutes and were quenched in oil. They were tempered for two hours at different temperatures between 475°C and 575°C. Specific temperatures are interesting to the heat treaters, as they could allow certain transformations which take place during tempering. Hardness measurements were carried out and statistically processed. The tempering diagram was plotted to the specified temperature range. The influence of tempering temperature on steel hardness was analysed and the resistance to tempering back of the steel was discussed. The tempering diagram is critical for metallurgists as it represents a guide to define the proper tempering parameters so that the hardness predicted according to the mechanical property requirements are obtained.
format	article
author	Mantzoukas John Papageorgiou Dimitris G. Medrea Carmen Stergiou Constantinos
author_facet	Mantzoukas John Papageorgiou Dimitris G. Medrea Carmen Stergiou Constantinos
author_sort	Mantzoukas John
title	Hardness behavior of W. Nr. 1.7709 steel, oil quenched and tempered between 475°C and 575°C
title_short	Hardness behavior of W. Nr. 1.7709 steel, oil quenched and tempered between 475°C and 575°C
title_full	Hardness behavior of W. Nr. 1.7709 steel, oil quenched and tempered between 475°C and 575°C
title_fullStr	Hardness behavior of W. Nr. 1.7709 steel, oil quenched and tempered between 475°C and 575°C
title_full_unstemmed	Hardness behavior of W. Nr. 1.7709 steel, oil quenched and tempered between 475°C and 575°C
title_sort	hardness behavior of w. nr. 1.7709 steel, oil quenched and tempered between 475°c and 575°c
publisher	EDP Sciences
publishDate	2021
url	https://doaj.org/article/76ade7ad9b584fdf81ea71fc488048b6
work_keys_str_mv	AT mantzoukasjohn hardnessbehaviorofwnr17709steeloilquenchedandtemperedbetween475cand575c AT papageorgioudimitrisg hardnessbehaviorofwnr17709steeloilquenchedandtemperedbetween475cand575c AT medreacarmen hardnessbehaviorofwnr17709steeloilquenchedandtemperedbetween475cand575c AT stergiouconstantinos hardnessbehaviorofwnr17709steeloilquenchedandtemperedbetween475cand575c
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Hardness behavior of W. Nr. 1.7709 steel, oil quenched and tempered between 475°C and 575°C

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