{"id":2659,"date":"2024-05-13T13:26:51","date_gmt":"2024-05-13T10:26:51","guid":{"rendered":"https:\/\/fti.dp.ua\/conf\/?p=2659"},"modified":"2024-05-14T19:41:23","modified_gmt":"2024-05-14T16:41:23","slug":"05134-1223","status":"publish","type":"post","link":"https:\/\/fti.dp.ua\/conf\/2024\/05134-1223\/","title":{"rendered":"Study of Properties of Austenitic Steel in the Initial State"},"content":{"rendered":"\n

Study of Properties of Austenitic Steel in the Initial State<\/h1>\n\n\n\n
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Serhii Bozhko<\/strong><\/h5>\n\n\n\n

ORCID: https:\/\/orcid.org\/0009-0006-0736-4968<\/a><\/em><\/p>\n\n\n\n

Oles Honchar Dnipro National University<\/em><\/p>\n<\/div><\/div>\n\n\n\n

<\/div>\n\n\n\n
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Anatolii Sanin<\/strong><\/h5>\n\n\n\n

ORCID: https:\/\/orcid.org\/0000-0002-5614-3882<\/a><\/em><\/p>\n\n\n\n

Oles Honchar Dnipro National University<\/em><\/em><\/p>\n<\/div><\/div>\n\n\n\n

<\/div>\n\n\n\n
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Yurii Tkachov<\/strong><\/h5>\n\n\n\n

ORCID: https:\/\/orcid.org\/0000-0003-1556-2463<\/a><\/em><\/p>\n\n\n\n

Oles Honchar Dnipro National University<\/em><\/em><\/p>\n<\/div><\/div>\n\n\n\n

<\/div>\n\n\n\n
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Viktor Khutornyi<\/strong><\/h5>\n\n\n\n

ORCID: https:\/\/orcid.org\/0009-0000-6013-5167<\/a><\/em><\/p>\n\n\n\n

Oles Honchar Dnipro National University<\/em><\/em><\/p>\n<\/div><\/div>\n\n\n\n

<\/div>\n\n\n\n

High-manganese steel is characterized by a stable austenitic structure over a wide temperature range and the ability to strengthen during mechanical deformation. However, factors such as unstable mechanical properties in the initial state, susceptibility to thermal embrittlement, and poor machinability hinder its widespread use. This study investigates the effect of temperature-time parameters on the structure and properties of 9\u041328\u042e9\u041c\u0412\u0411 steel. It was found that during slow cooling from temperatures of hot deformation, a large number of coarse phase particles of gray-blue color are precipitated in the steel, leading to a sharp decrease in impact toughness. It has been established that in the temperature range of 500-800 \u00b0C, the decomposition of the solid solution occurs with the precipitation of particles of the strengthening K-phase – (Fe,Mn)3AL,Cx. Simultaneous decrease in hardness and impact toughness in the temperature range of 750-950 \u00b0C contributes significantly to improved machinability. The lowest values of mechanical properties are achieved during aging at 700 \u00b0C, with the maximum improvement in machinability compared to other aging temperatures. For example, with an increase in the temperature of isothermal holding at 650 \u00b0C for 35 hours, the machinability improves by almost 1.7 times, and at the same duration at 700 \u00b0C – by 2.4 times. With an increase in the holding temperature to 950 \u00b0C for 35 hours, the machinability of the steel increases only by 1.6 times, which is due to less intensive decomposition of the supersaturated solid solution. Studies of the effect of annealing temperature on the uniformity of austenitic steel allowed to develop a heat treatment regimen for 9\u041328\u042e9\u041c\u0412\u0411 austenitic steel, which includes heating to 1250\u00b0C, holding for 2 hours at this temperature, and subsequent cooling in water to fix a homogeneous supersaturated solid solution. After such heat treatment, the stripe-like microchemical inhomogeneity is significantly reduced, and the anisotropy coefficient does not exceed 1.1 units for all types of steel products.<\/p>\n\n\n\n

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FULL TEXT<\/a><\/div>\n<\/div>\n\n\n\n
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CIMS 2024 Vernal<\/a><\/div>\n\n
Structural and Functional Materials<\/a><\/div><\/div>\n\n\n\n
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Study of Properties of Austenitic Steel in the Initial State Serhii Bozhko ORCID: https:\/\/orcid.org\/0009-0006-0736-4968 Oles Honchar Dnipro National University Anatolii Sanin ORCID: https:\/\/orcid.org\/0000-0002-5614-3882 Oles Honchar Dnipro National University Yurii Tkachov ORCID: https:\/\/orcid.org\/0000-0003-1556-2463 Oles Honchar Dnipro National University Viktor Khutornyi ORCID: https:\/\/orcid.org\/0009-0000-6013-5167 Oles Honchar Dnipro National University High-manganese steel is characterized by a stable austenitic structure over a wide temperature range and the ability to strengthen during mechanical deformation. However, factors such as unstable mechanical properties in the initial state, susceptibility … <\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[32],"tags":[29],"class_list":["post-2659","post","type-post","status-publish","format-standard","hentry","category-matrl-tech-2","tag-cims-2024-vernal"],"_links":{"self":[{"href":"https:\/\/fti.dp.ua\/conf\/wp-json\/wp\/v2\/posts\/2659","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/fti.dp.ua\/conf\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/fti.dp.ua\/conf\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/fti.dp.ua\/conf\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/fti.dp.ua\/conf\/wp-json\/wp\/v2\/comments?post=2659"}],"version-history":[{"count":3,"href":"https:\/\/fti.dp.ua\/conf\/wp-json\/wp\/v2\/posts\/2659\/revisions"}],"predecessor-version":[{"id":2678,"href":"https:\/\/fti.dp.ua\/conf\/wp-json\/wp\/v2\/posts\/2659\/revisions\/2678"}],"wp:attachment":[{"href":"https:\/\/fti.dp.ua\/conf\/wp-json\/wp\/v2\/media?parent=2659"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fti.dp.ua\/conf\/wp-json\/wp\/v2\/categories?post=2659"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fti.dp.ua\/conf\/wp-json\/wp\/v2\/tags?post=2659"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}