Abstract
Thermomechanical treatment consists in using two classic manufacturing methods. This type of treatment was applied to studied high-speed steel (HS2-9-1-8). The tests performed aimed to establish the influence on the hardness and wear of the high-temperature thermomechanical treatment (HTTMT) applied to studied steel. The application of an additional plastic deformation (the deformation degree between 45 – 75%) positively influences the hardness and wear value. Being a HTTMT, the plastic deformation was followed by quenching, the utilized agent being the oil or compressed air. When the quenching agent was the oil the hardness increased by 6-7% and the wear diminished up to 40%. Samples thermally treated in the classical way were used as comparison elements. The study performed shows that a favourable evolution of the analysed properties appears when the deformation degree is between 55 and 75%. The air compressed quenching sets for the analysed characteristics, the same evolution with those obtained during the oil quenching. The increased hardness for the studied high-speed steel utilized at cutting tools manufacturing will generate a slower wear of the cutting edge that means important economies in cutting process.
Highlights
Most pieces executed for the industry are of the metallic materials, being processed by cutting; the consumption of cutting tools is significant
Previous researches have shown that applying a thermomechanical treatment improves both hardness and toughness Catana[1]
Applying high-temperature thermomechanical treatment (HTTMT) determines significantly improvement of the HS2-9-1-8 high-speed steel micro-structure compared to the samples that have not benefited from plastic deformation
Summary
Most pieces executed for the industry are of the metallic materials, being processed by cutting; the consumption of cutting tools is significant. Thanks to an acceptable price/quality ratio and to good toughness (resilience), the high-speed steel tools will be especially used for processing unique pieces. This is the reason why this research has been launched. Previous researches have shown that applying a thermomechanical treatment (heat plastic deformation followed by thermal treatment specific to high-speed steel) improves both hardness and toughness Catana[1]. Another test has been made on two wolfram-molybdenum high-speed steels and the conclusion was to use tools made by plastic deformation Berkowski[2]. This paper presents the results of the second stage and shows a way to improve, material hardness and wear, which obviously will increase the characteristics of cutting tool
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
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 callDisclaimer: 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.
