Abstract
At the Navoi Mining and Metallurgical Combine, which uses a large number of machine parts for mining operations, the issue of optimizing the compositions of wear-resistant chromium cast irons while maintaining their operational characteristics has arisen. The paper presents the results of studying the phase composition of the cast alloy, as well as the effect of heat treatment of cast iron with a high chromium content on its structure and properties. As heat treatment operations, quenching in various modes and low tempering were used. The study made it possible to systematize the known literature data on the heat treatment parameters of a group of wear-resistant chromium cast irons, as well as to optimize their heat treatment modes for parts operating in mining and processing industry.
Highlights
At the Navoi Mining and Metallurgical Combine, which uses a large number of machine parts for mining operations, the issue of optimizing the compositions of wear-resistant chromium cast irons while maintaining their operational characteristics has arisen
The paper presents the results of studying the phase composition of the cast alloy, as well as the effect of heat treatment of cast iron with a high chromium content on its structure and properties
As heat treatment operations, quenching in various modes and low tempering were used. The study made it possible to systematize the known literature data on the heat treatment parameters of a group of wear-resistant chromium cast irons, as well as to optimize their heat treatment modes for parts operating in mining and processing industry
Summary
Особенность этих сплавов состоит в том, что все они предназначены для литья конкретной детали. Хи‐ мический состав их заметно отличается по количеству легирующих элементов. Поскольку задача заключа‐ лась в том, чтобы заменить быстроизнашиваемую деталь из дорогих сплавов, химический состав которых принимался на базе импортных чугунов (сплавы 1, 2), на деталь, изготовленную из чугуна собственного производства (сплав 3), то работа была направлена на изучение структуры и свойс тв чугунов разных марок. При этом необходимо было установить возможные преимущества менее легированного чугуна с точки зре‐ ния технологичности изготовления требуемой детали. Что содержание никеля, молибде‐ на, титана, хрома в сплаве 3 ниже, чем в сплавах 1 и 2, что обеспечивает его более низкую себестоимость. Что отливки после литья будут термообрабатываться (закалка на воздухе), что позво‐ лит повысить твердость и износостойкость без использования значительного количества легирующих элементов [7, 8]
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Litiyo i Metallurgiya (FOUNDRY PRODUCTION AND METALLURGY)
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
