title: ÐÐ½Ð°Ð»Ð¸Ð· ÑÐ²Ð°ÑÐ¸Ð²Ð°ÐµÐ¼Ð¾ÑÑÐ¸ Ð¸ Ð¼Ð¸ÐºÑÐ¾ÑÑÑÑÐºÑÑÑÑ Ð²ÑÑÐ¾ÐºÐ¾Ð¿ÑÐ¾ÑÐ½ÑÑ Ð±ÐµÐ¹Ð½Ð¸ÑÐ½ÑÑ ÑÑÐ°Ð»ÐµÐ¹
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: Analysis of weldability and microstructure of high-strength bainitic steels
Creators: name: Ð¡Ð¼Ð¾ÑÐ¾Ð´Ð¸Ð½, ÐÐ½Ð´ÑÐµÐ¹
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: 2021
Subjects: Ð²Ð°ÑÐºÐ°
Ð±ÐµÐ¹Ð½Ð¸ÑÐ½Ð°Ñ Ð¼Ð¸ÐºÑÐ¾ÑÑÑÑÐºÑÑÑÐ°
Ð²ÑÑÐ¾ÐºÐ¾Ð¿ÑÐ¾ÑÐ½ÑÐµ ÑÑÐ°Ð»Ð¸
ÑÐ°Ð·Ð¾Ð²ÑÐµ Ð¿ÑÐµÐ²ÑÐ°ÑÐµÐ½Ð¸Ñ
ÑÐ²Ð°ÑÐ¸Ð²Ð°ÐµÐ¼Ð¾ÑÑÑ
Ñ Ð¾Ð»Ð¾Ð´Ð½ÑÐµ ÑÑÐµÑÐ¸Ð½Ñ
welding
bainite microstructure
high-strength steels
phase transformation
weldability
cold cracks

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description: The topic of the final qualification work: "Analysis of weldability and microstructure of high-strength bainitic steels" This work is devoted to the analysis of the weldability of high-strength steels with a bainitic structure and the study of their microstructure. The tasks that were solved in the course of the study: 1. To evaluate the methods for determining the weldability of high-strength steels with bainitic structure. 2. To give an experimental assessment of the weldability of bainitic steels. On the basis of various analyzed literature sources, the fields of application of steels with bainitic structure and the type of rolled products produced for the manufacture of various structures were considered. Some grades of steels from various types of rolled products were considered, as well as their properties and fields of application. The main type of defect in the form of cold cracks was determined. When considering the bainite structure, bainite transformations into upper and lower bainite and their microstructure were considered. The phase transformation diagrams were used to consider the structures obtained as a result of the regulation of temperatures and cooling rates. To assess the weldability of bainitic steels, the carbon equivalent and crack resistance criteria for steels prone to the formation of defects supported by diffusion hydrogen were considered. For the experimental assessment of weldability, various samples with external and self-loading were considered for the manifestation of defects in steels prone to cold cracking.