The influence of pre-tempering on the mechanical properties of HS18-0-1 high speed steel

• Autorzy: Bała P. , Pacyna J.
• Języki publikacji: EN

Abstrakty

EN

Purpose: Main objective of the research presented in this work was the evaluation of the influence of pre-tempering on the properties of HS18-0-1 steel after principal tempering. Design/methodology/approach: Samples of test steel, previously hardened from the temperature of 1260*C have been pre-tempered at 20, 250, 450 and 520*C for 1,5 hour and subsequently cooled in air. After that principal tempering has been applied 3x580*C/1h. Due to high brittleness of test steel it was decided to test their strength with static bend test. The tests have been carried out on φ 5 samples using INSTRON testing machine. Evaluation of crack resistance of test steels has been made by means of linear elastic fracture mechanics method on the basis of the measurement of stress intensity factor KIc, in static bend test. Findings: It has been stated that, in test steel in which remains a lot of retained austenite after hardening, the pre-tempering within the range of cementite precipitation and transformation of retained austenite, adversely affects the properties after principal tempering. Pre-tempering of the investigated steel at the temperature insignificantly higher than start temperature of precipitation of MC type alloy carbides results in decrease of strength properties by insignificant increase of KIc. Research limitations/implications: Description of the influence of pre-tempering on the mechanical properties of HS18-0-1 high speed steel. Practical implications: This results should be of interest to engineers concerned with design new technologies of steel tempering. Originality/value: It was shown, that advance (by pre-tempering) of selected phase transformations during tempering may affect steel properties after principal tempering.

Słowa kluczowe

EN

tool materials; pre-tempering; mechanical properties; high-speed steel

PL

materiały narzędziowe; własności mechaniczne; stal szybkotnąca

• Wydawca: International OCSCO World Press
• Czasopismo: Archives of Materials Science and Engineering
• Rocznik: 2007
• Tom: Vol. 28, nr 10
• Strony: 581--584
• Opis fizyczny: Bibliogr. 15 poz., il., wykr.

Twórcy

autor

Bała P.

autor

Pacyna J.

• Faculty of Metals Engineering and Industrial Computer Science, AGH University of Science and Technology, ul. Mickiewicza 30, 30-059 Kraków, Poland,

Bibliografia

• [1] A. K. Sinha, Physical metallurgy handbook, The McGraw-Hill Companies, Inc., 2003.
• [2] R. W. K. Honeycombe, H. K. D. H. Bhadeshia, Steels. Microstructure and properties, 2nd ed. London, Edward Arnold, 1995.
• [3] M. Blicharski, Steels, WNT, Warsaw, 2004 (in Polish).
• [4] L. A. Dobrzański, W. Kasprzak, J. Mazurkiewicz, The structure and properties W-Mo-V-Co high-speed steel of the type 11-2-2-5 after heat treatment, Proceedings of the 4th International Scientific Conference „Achievements in Mechanical and Materials Engineering” AMME’95, Gliwice-Wisła 1995, 83-86 (in Polish).
• [5] L. A. Dobrzański, A. Zarychta, The structure and properties of W-Mo-V high-speed steels with increased contents of Si and Nb after heat treatment, Journal of Materials Processing Technology 77 (1998) 180-193.
• [6] F. Pan, Ma Hirohashi, Y. Lu, P. Ding, A. Tang and D. V. Edmonds, Carbides in High-Speed Steels Containing Silicon, Metallurgical and Materials Transactions 35A (2004) 2757-2766.
• [7] L. A. Dobrzański, M. Ligraski, Role of Ti in the W-Mo-V high-speed steels, Proceedings of the 4th International Scientific Conference „Achievements in Mechanical and Materials Engineering” AMME'95, Gliwice-Wisła 1995, 87-90.
• [8] M. Wang, Y. Wang and F. Sun, Tempering behavior of a semi-high speed steel containing nitrogen, Materials Science and Engineering A 438-440 (2006) 1139-1142.
• [9] L. Xu, J. Xing, S. Wei, Y. Zhang, R. Long, Study on relative wear resistance and wear stability of high-speed steel with high vanadium content, Wear 262 (2007) 253-261.
• [10] P. Bała, The kinetics of phase transformations during tempering and its influence on the mechanical properties, PhD thesis, AGH University of Science and Technology, Cracow 2007. Promotor J. Pacyna (in Polish).
• [11] P. Bała, J. Pacyna, J. Krawczyk: The kinetics of phase transformations during the tempering of HS18-0-1 highspeed steel. Journal of Achievements in Materials and Manufacturing Engineering 19/1 (2006) 19-25.
• [12] P. Bała, J. Pacyna, J. Krawczyk, The kinetics of phase transformations during the tempering of HS6-5-2 high-speed steel. Journal of Achievements in Materials and Manufacturing Engineering 18 (2006) 47-50.
• [13] T. H. Yu, C. Y. Chen, and J. R. Yang, Decomposition of Retained Austenite in a High-Speed Steel GPM A30, Journal of Materials Engineering and Performance 16 (2007) 102-108.
• [14] L. A. Dobrzański, M. Adamiak, W. Kasprzak, Structure and properties of the heat-treated and PVD coated W-Mo-V-Co high-speed steel of the 9-2-2-5 type, Proceedings of the 7th International Scientific Conference „Achievements in Mechanical and Materials Engineering” AMME'98, Gliwice-Zakopane 1998, 107-110.
• [15] T. Babul, N. Kucharieva, A. Nakonieczny and J. Senatorski, Structure and Properties of Nitrocarburized Diffusion Layers Generated on High-Speed Steels, Journal of Materials Engineering and Performance 12 (2003) 696-700.