Influence of the microstructure and loads on tribological properties of G155CrNiMo4-3-3 cast steel
Wybrane pełne teksty z tego czasopisma
Materials for mill rolls, fulfilling high requirements due to difficult exploitation conditions, are cast steels of adamite grade. Those are cast steels of pearlitic matrix with uniformly distributed cementite precipitations (e.g. hypereutectoid). In respect of a microstructure and a chemical composition these steels are hypereutectoid steels. They contain chromium (app. 1 %) and nickel (app. 0.5 %) and sometimes have an increased content of silica. Admissible is also a content of Mo (app. 0.4 %). An uniformly distributed carbide phase can be obtained by the proper heat treatment. The determination of the heat treatment influence on tribological properties - in dependence of the applied load - of adamite hypereutectoid G155CrNiMo4-3-3 cast steel, used for mill rolls - was the aim of the hereby paper. The purpose of the applied heat treatment was to change the hypereutectoid cementite morphology. Tribological tests were carried out at a room temperature by means of the T-05 tester, at loads of: 50, 100 and 150 N. Bearing steel 100Cr6 of a hardness 57 HRC was used as a counter sample. Testing time was 400 seconds. During the test the abrasion products were being removed from the counter sample. The performed investigations allow to draw conclusions regarding the influence of the hypereutectoid cementite morphology and loads on a wear mechanism and intensity of wearing of hypereutectoid adamite cast steel.
Bibliogr. 25 poz., rys., tab.
-  J. Krawczyk, J. Pacyna, The role of transformed ledeburite in high temperature tribology on the example of adamite rolls, proceedings of the Eleventh International Scientific Conference Contemporary Achievements in Mechanics, Manufacturing and Materials Science, Gliwice–Zakopane (2005) 535-540.
-  J. Krawczyk, Effect of the microstructure on tribological phenomena occurring on the surface of a mill roll made of SA5T cast iron (GJSL-HV600 – GJSL-330NiMoCr12-8-3), Archives of Foundry Engineering, Vol. 8, No. 2 (2008) 170-174.
-  J. Krawczyk, J. Pacyna, A. Kokosza, Fracture toughness of cast materials for mill rolls, Proceedings of the 6th International Conference for Mesomechanics, Multiscaling in Applied Science and Emerging Technology, Fundamentals and Applications in Mesomechanics, 31 May - 4 June, 2004, Patras, Greece, p. 203÷207.
-  J. Krawczyk, Structural causes of defects in a cast iron mill roll, Archives of Foundry Engineering, vol. 8, No. 2 (2008) 93-98.
-  G. Pintaude, F.G. Bernardes, M.M. Santos, A. Sinatora, E. Albertin, Mild and severe wear of steels and cast irons in sliding abrasion, Wear, vol. 267 (2009) 19-25.
-  M. Pellizzari, D. Cescato, M.G. De Flora, Hot friction and wear behaviour of high speed steel and high chromium iron for rolls, Wear, vol. 267 (2009) 467-475.
-  J.J. Coronado, A. Gómez, A. Sinatora, Tempering temperature effects on abrasive wear of mottled cast iron, Wear, vol. 267 (2009) 2070-2076.
-  D.N. Hanlon, W.M. Raiforth, C.M. Sellars, The rolling/sliding wear response of conventionally processed and spray formed high chromium content cast iron at ambient and elevated temperature, Wear, vol. 225-229 (1999) 587-599.
-  E. Rożniata, J. Pacyna, Effect of annealing on mechanical properties of ledeburitic cast steel, Journal of Achievements in Materials and Manufacturing Engineering, vol. 20, No. 1-2 (2007) 187-190.
-  E. Rożniata, J. Pacyna, Effect of structure on mechanical properties of Cr-Ni-Mo cast steel, Archives of Materials Science and Engineering, vol. 28, No. 4 (2007) 224-230.
-  E. Rożniata, J. Pacyna, Hypereutectoid cementite morphology and mechanical properties of Cr-Ni-Mo cast steel, Journal of Achievements in Materials and Manufacturing Engineering, vol. 17, No. 1 (2006) 145-148.
-  J. Krawczyk, E. Rożniata, J. Pacyna: The influence of hypereutectoid cementite morphology upon fracture toughness of chromium-nickel-molybdenum cast steel of ledeburite class, J. of Materials Processing Technology, 162-163 (2005) 336÷341.
-  J. Krawczyk, J. Pacyna, The influence of microstructure of mottled cast iron for mill rolls on its properties, Metal 2009 – 18th International Conference on Metallurgy and Materials, May 19th-21st, 2009, Hradec n. Moravicy, Czech Republic, 266-272.
-  D. Kopyciński, Inoculation of chromium white cast iron, Archives of Foundry Engineering, vol. 9, No. 1 (2009) 191-194.
-  E. Fraś, M. Kawalec, Effect of silicon on the structure and mechanical properties of high-vanadium cast iron, Archives of Foundry Engineering, vol. 9, No. 3 (2009) 231-134.
-  E. Fraś, M. Kawalec, Effect of small additions of vanadium and niobium on structure mechanical properties of nodular cast iron, Archives of Foundry Engineering, vol. 6, No. 21(1/2) (2006) 383-388 (in Polish).
-  E. Guzik, Some selected problems concerning the processes of cast iron improvement, Archives of Foundry, 2001, Monograph No. 1M (in Polish).
-  E. Rożniata, J. Pacyna, Structure of chromium-nickelmolybdenum cast steel after additional heat treatment, Archives of Foundry Engineering, vol. 6, No. 21(1/2) (2006) 85-92 (in Polish).
-  S. Rzadkosz, L. Staszczak, High chromium cast iron for impellers of shot blasing machines, Archives of Foundry, vol. 6, No 21(1/2) (2006) 71-78 (in Polish).
-  A. Pirek, Z. Stradomski, The role of the microstructure on the fracture mechanism of cast tool steel, XXXIII School of Materials Engineering, Kraków-Ustroń (2005) 117-120 (in Polish).
-  S. Stachura, T. Borek, J. Jańczyk, Investigation of alloy high carbon cast steel for mill rolls, Metallurgy and Foundry Engineering, 111 (1987) 203-214 (in Polish).
-  J. Głownia, The role of segregation in fracture toughness of cast steel rolls, Metallurgy and Foundry Engineering, 111 (1987) 215-223 (in Polish).
-  E. Rożniata, J. Pacyna, Effect of annealing on mechanical properties of G200CrNiMo4−3−3 cast steel, XXXV School of Materials Engineering, Krakow−Krynica (2007) 46-53 (in Polish).
-  M. Pellizzari, A. Molinari, G. Straffelini, Tribological behaviour of hot rolling rolls, Wear, vol. 259 (2005) 1281-1289.
-  M. Kawalec, E. Fraś, Abrasive wear resistance of high vanadium cast iron, Archives of Foundry Engineering, Vol. 9, No. 4 (2009) 103-108.