Wear of conventional pearlitic and improved bainitic rail steels

Lee, Ki Myung; Polycarpou, Andreas A.

doi:10.1016/j.wear.2005.02.058

Cited by 125 publications

(68 citation statements)

References 10 publications

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“…Therefore, there is a growing interest in a development of new steels that are more suitable for heavily loaded elements of the railway track. One of the possible candidates are bainitic steels [4][5][6][7][8][9][10][11]. The bainitic steels currently used for frogs are mostly low-alloyed.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Heat Treatment on Microstructure and Mechanical Properties of Cast Bainitic Steel Used for Frogs in Railway Crossovers

Parzych¹

2017

Archives of Metallurgy and Materials

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This work deals with the effect of heat treatment on a microstructure and mechanical properties of a selected cast steel assigned as a material used for frogs in railway crossovers. Materials used nowadays in the railway industry for frogs e.g. Hadfield cast steel (GX120Mn13) or wrougth pearlitic steel (eg. R260) do not fulfil all exploitation requirements indicated in the UIC (International Union of Railways) Decision No. 1692/96 in terms of train speed that should be reached on railways. One of the possible solution is using a cast steel with bainitic or bainitic-martensitic microstructure that allows to gain high strength properties the ultimate tensile strength (UTS) of 1400 MPa, the tensile yield strength (TYS) of 900 MPa and the hardness of up to 400 BHN. The tested material is considered as an alternative to Hadfield cast steel that is currently used for railway frogs.Results of an experimental analysis of the effect of conducted heat treatment on a microstructure, the volume fraction of retained austenite and mechanical properties of bainitic steel, are shown in this paper. It was found that, the heat treatment leads to a stabilization of retained austenite in grain boundaries area of the primary austenite. Additionally, the heat treatment according to the variant #3 results with an almost 3-times higher impact toughness to that exhibited by material subjected to the other treatments.

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Section: Introductionmentioning

confidence: 99%

The Effect of Heat Treatment on Microstructure and Mechanical Properties of Cast Bainitic Steel Used for Frogs in Railway Crossovers

Parzych¹

2017

Archives of Metallurgy and Materials

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“…The Berkovich indenter area functions used for calculation of H and E r were derived by fitting nanoindentation data on a fused quartz sample to a standard equation [14]. Ball-on-disc dry sliding experiments were conducted at room temperature (22 °C) and a controlled humidity of 20% using a Standard Tribometer [15].…”

Section: Methodsmentioning

confidence: 99%

Mechanical and high pressure tribological properties of nanocrystalline Ti(N,C) and amorphous C:H nanocomposite coatings

Tsotsos

Polychronopoulou

Demas

et al. 2010

Diamond and Related Materials

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“…Premium rails [2,3] or other long products [4] may also be made of bainitic steels. The automobile weight can be reduced by using high-strength steels as long as they maintain the ductility at the required level.…”

Section: Introductionmentioning

confidence: 99%

“…Beyond the bainitic ferrite volume fraction, thickness of the platelets is calculated using equation (3). The relative platelet thickness is introduced as w αB = w αB /D γ , where D γ is the austenite grain size.…”

mentioning

confidence: 99%

Through Process Modelling of Rolling and Controlled Cooling of TRIP Assisted Bainitic Steel Rods and Prediction of the Retained Austenite in Products

Kuziak

Kania

Pidvysotskyy

et al. 2017

MSF

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Abstract. Simulation of the rolling and controlled cooling sequence for bainitic steel rods was the general objective of the paper. The main focus was put on exploring possibility of prediction of the retained austenite occurrence in TRIP assisted bainitic steels. Existing discrete phase transformation models require long computing times and their application to optimization of industrial processes is limited. Therefore, a model based on the modified JMAK equation was proposed. The occurrence of the retained austenite was predicted by carbon distribution calculations in the austenite during bainite transformation. This model was implemented into the FE software for simulation of cooling of rods. The model was verified by comparison of results with the physical simulations during rolling in the pilot mill and during cooling. The first part of the paper contains thermal-mechanicalmicrostructural simulations of rod hot rolling process. The objective of this part was to determine temperature and grain size distribution at the rod cross section at the beginning of phase transformations. FE simulations of the cooling were performed next. Correlation between cooling parameters and the volume fraction of the retained austenite in rod was determined.

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Wear of conventional pearlitic and improved bainitic rail steels

Cited by 125 publications

References 10 publications

The Effect of Heat Treatment on Microstructure and Mechanical Properties of Cast Bainitic Steel Used for Frogs in Railway Crossovers

The Effect of Heat Treatment on Microstructure and Mechanical Properties of Cast Bainitic Steel Used for Frogs in Railway Crossovers

Mechanical and high pressure tribological properties of nanocrystalline Ti(N,C) and amorphous C:H nanocomposite coatings

Through Process Modelling of Rolling and Controlled Cooling of TRIP Assisted Bainitic Steel Rods and Prediction of the Retained Austenite in Products

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