Deep cryogenic treatment of H11 hot working tool steel

• Autorzy: Suchmann P. , Niznanska J.
• Języki publikacji: EN

Abstrakty

EN

Purpose: The investigation procedure and results of exploring the impact of deep cryogenic treatment on the wear resistance and microstructure of the X37CrMoV5-1 hot work steel. Design/methodology/approach: The wear resistance and microstructure of the X37CrMoV5-1 hot work steel. The wear resistance was measured at 400°C using the pin-on-disc method with a rotary tribometer. The microstructure of the steel was examined using optical and transmission electron microscopes. Findings: The result show a significant improvement of wear resistance through DCT, especially at high sliding velocities that are typical of many industrial applications of hot working steels (e.g. closed die forging). Apart from this, some effects of DCT on the microstructure were found, which contributed to better understanding of this process. Practical implications: The article describes the influence of DCT on the microstructure and properties of X37CrMoV5-1 (H11) hot working tool steel. Wear resistance of specimens treated using DCT was analysed on pin-on-disc wear tester and compared to that of specimens treated using standard quenching and tempering. Furthermore, the specimens’ microstructures were analysed by TEM. Originality/value: Unlike conventional cold treatment, which is commonly used for elimination of retained austenite, deep cryogenic treatment (DCT) primarily improves the wear resistance of tools. This effect is supposed to result from preferential precipitation of fine η-carbides whose formation mechanism is the subject of several recent investigations performed mainly on high speed steels.

Słowa kluczowe

EN

tool steel; microstructure; wear resistance; dilatometry; precipitation

PL

stal narzędziowa; mikrostruktura ADI; odporność na zużycie; dylatometria; opad atmosferyczny

• Wydawca: International OCSCO World Press
• Czasopismo: Journal of Achievements in Materials and Manufacturing Engineering
• Rocznik: 2015
• Tom: Vol. 73, nr 1
• Strony: 21--26
• Opis fizyczny: Bibliogr. 11 poz., rys., tab.

Twórcy

autor

Suchmann P.

• COMTES FHT a.s., Prumyslová 995, Dobrany 334 41, Czech Republic

autor

Niznanska J.

• COMTES FHT a.s., Prumyslová 995, Dobrany 334 41, Czech Republic

Bibliografia

• [1] A. Oppenkowski, Cryobehandlung von Werkzeugstahl, PhD. thesis, Ruhr-Universität Bochum (DE), 2011.
• [2] P. Šuchmann, A. Ciski, Enhancing of lifetime of forging dies by means of deep cryogenic treatment, Proceedings of the 19th International Forging Congress, Chicago, USA, 2008.
• [3] F.P. Stratton, Optimizing nano-carbide precipitation in tool steels, Materials Science and Engineering A 449 (2007) 809-812.
• [4] G.R. Tated, R.S. Kajale, K. Iyer, Improvement in tool life of cutting tools by application of deep cryogenic treatment, Proceedings of the 7th International Tooling Conference, Torino, Italy, 2006.
• [5] N.D. Collins, G. O’Rourke, Response of tool steels to deep cryogenic treatment, Effect of Alloying Elements“, ASM, Materials Park, OH, 1998.
• [6] N.D. Collins, Deep cryogenic treatment of tool steels: a Review, Heat Treatment of Metals 5 (1996) 40-42.
• [7] N.D. Collins, J. Dormer, Deep cryogenic treatment of a D2 cold-work tool steel, Heat Treatment of Metals 3 (1997) 71-74.
• [8] K. Moore, N.D. Collins, Cryogenic treatment of three heat-treated tool steels, Key Engineering Materials 86-87 (1993) 47-54.
• [9] D. Das, K.A. Dutta, V. Toppo, K.K. Ray, Effect of deep cryogenic treatment on the carbide precipitation and tribological behavior of D2 steel, Materials and Manufactirung Processes 22/4 (2007) 474-480.
• [10] D. Das, K.A. Dutta, K.K. Ray, Correlation of microstructure with wear behavior of deep cryogenically treated AISI D2 steel, Wear 267/9-10 (2009) 1371-1380.
• [11] D. Das, K.A. Dutta, V. Toppo, K.K. Ray, Inconsistent wear behavior of cryotreated tool steels: the role of mode and mechanism, Materials Science and Technology 25/10 (2009) 1249-1257.