title: ÐÑÑÐ»ÐµÐ´Ð¾Ð²Ð°Ð½Ð¸Ðµ Ð¾ÑÐ¾Ð±ÐµÐ½Ð½Ð¾ÑÑÐµÐ¹ Ð¿Ð¾Ð»ÑÑÐµÐ½Ð¸Ñ Ð°Ð²ÑÐ¾Ð¼Ð°ÑÐ½ÑÑ ÑÑÐ°Ð»ÐµÐ¹ Ñ Ð²Ð¸ÑÐ¼ÑÑÐ¾Ð¼
title: Ð²ÑÐ¿ÑÑÐºÐ½Ð°Ñ ÐºÐ²Ð°Ð»Ð¸ÑÐ¸ÐºÐ°ÑÐ¸Ð¾Ð½Ð½Ð°Ñ ÑÐ°Ð±Ð¾ÑÐ° Ð±Ð°ÐºÐ°Ð»Ð°Ð²ÑÐ°
titleType: Subtitle
title: Investigation of free-cutting steels with bismuth production features
Creators: name: Ð Ð¾Ð²Ð±Ð¾, ÐÐ½Ð½Ð°
Publisher: name: Ð¡Ð°Ð½ÐºÑ-ÐÐµÑÐµÑÐ±ÑÑÐ³ÑÐºÐ¸Ð¹ Ð¿Ð¾Ð»Ð¸ÑÐµÑÐ½Ð¸ÑÐµÑÐºÐ¸Ð¹ ÑÐ½Ð¸Ð²ÐµÑÑÐ¸ÑÐµÑ ÐÐµÑÑÐ° ÐÐµÐ»Ð¸ÐºÐ¾Ð³Ð¾
Year: 2022
Subjects: Ð°Ð²ÑÐ¾Ð¼Ð°ÑÐ½ÑÐµ ÑÑÐ°Ð»Ð¸
Ð»Ð¸ÑÐ°Ñ ÑÑÑÑÐºÑÑÑÐ°
Ð²Ð¸ÑÐ¼ÑÑ
Ð³Ð¾ÑÑÑÐ°Ñ Ð¿ÑÐ¾ÐºÐ°ÑÐºÐ°
ÑÐ»ÑÑÑÐµÐ½Ð¸Ðµ Ð¾Ð±ÑÐ°Ð±Ð°ÑÑÐ²Ð°ÐµÐ¼Ð¾ÑÑÐ¸
ÑÐµÑÐ¼Ð¾Ð´Ð¸Ð½Ð°Ð¼Ð¸ÐºÐ°
ÑÐ°ÑÑÐ²Ð¾ÑÐ¸Ð¼Ð¾ÑÑÑ Ð²Ð¸ÑÐ¼ÑÑÐ°
Ð»Ð¸ÐºÐ²Ð°ÑÐ¸Ñ
free cutting steels
cast structure
metallic inclusions
hot rolling
improvement of machinability
thermodynamics of bismuth solubility

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description: The subject of the graduate qualification work: "Research of peculiarities of production of bismuth free cutting steels". The work is devoted to the study of free cutting steels with the addition of bismuth to improve the machinability. The tasks that were solved during the study: 1. to study the characteristics of the effect of various additives for improving machinability in free cutting steels. 2. Determination of thermodynamic characteristics of bismuth solubility behavior during steel melting process. 3. Study of nature of distribution of non-metallic inclusions in free cutting steels AB40X and AB14 in the cast state. 4. Study of nature of distribution of nonmetallic inclusions in free cutting steels AB40Ð¥ and AB14 in the deformed state. 5.Study of chemical composition of nonmetallic inclusions in the investigated steels.In the course of work, the peculiarities of production of free cutting steels AB40X and AB14 have been studied and the peculiarities of formation of bismuth assimilation with regard to its solubility and liquation of alloying elements have been studied. It is established that for steel AB40X ultimate solubility of bismuth is 0.139%, and for steel AB14 0.145%. During the crystallization process, almost 86% is released as non-metallic inclusions in AB40X steel and 75% in AB14 steel of the total bismuth concentration in the alloy, which shows that bismuth is a suitable additive for improving machinability of free cutting steels.Â