Effects of Heat-Treatment on the Microstructure and Wear Resistance of a High-Chromium Cast Iron for Rolls

Guo, Zhihong; Xiao, Furen; Lu, Su-ling; Li, Han-yun; Liao, Bo

doi:10.1155/2016/9807685

Cited by 16 publications

(13 citation statements)

References 14 publications

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“…The phenomenon itself is of considerable importance in the wear-resistant steels used in earth-moving equipment such as excavators and loaders, and machines used in mining operation. Abrasion per se correlates strongly with hardness, although it is well-established that hardness alone does not always explain the wear behaviour [ 3 – 11 ]. For instance, abrasion wear resistance of commercially available steels showed no correlation with their hardness [ 4 ].…”

Section: Introductionmentioning

confidence: 99%

Role of fracture toughness in impact-abrasion wear

Chintha

Valtonen²,

Kuokkala³

et al. 2019

Wear

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Two new low alloyed steels were developed with different fracture toughness values but at similar level of hardness with same composition and microstructural phase. The steels were subjected to impact-abrasion wear test. This work examines specifically the additional role of toughness during impact-abrasion wear, using a newly developed high toughness steel. Microstructural characterisation of the damaged samples revealed that better toughness helps resist both impact and abrasion damage.

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Section: Introductionmentioning

confidence: 99%

Role of fracture toughness in impact-abrasion wear

Chintha

Valtonen²,

Kuokkala³

et al. 2019

Wear

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“…The hardness of HCCI gets high enough by rapid cooling. Tempering the quenched specimen helped in decreasing the hardness and increasing the impact toughness [11]. In a study, after performing annealing, ultimate tensile strength had an upward result but there was opposite result for ductility [12].…”

Section: Continuous Cooling Transformationmentioning

confidence: 99%

Analysing strength, hardness and grain-structure of 0.2%-C steel specimens processed through an identical heating period with different continuous transformation rates

Dewangan

Singhal

Selvaraj

et al. 2022

Mater. Res. Express

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The present work deals with improvement of mechanical properties and refining the microstructure of low carbon steel (0.2%-C) after applying heat treatment techniques. For the purpose, five different samples were taken under study. First sample was kept in ‘as received’ condition and other four samples were undergone into heating process in an Induction furnace. The holding temperature of all the four samples were kept common i.e., 850oC for a fixed period of 2.5 hours. Then, these four samples were cooled into four different cooling media i.e., Air, Water, Oil, and Furnace. All the samples were in the form of rods with 195 mm length and 32 mm diameter. The Universal testing machine was used to determine the tensile strength of all the samples. Rockwell hardness tester was used to find the hardness of samples. The microstructural variation was analysed through an optical microscope. All the results were analysed and compared with ‘as received’ sample. The Oil cooled sample showed the highest tensile strength of 585 MPa. The microstructural orientation of oil cooled sample i.e., bainite + fine lamella of ferrite and cementite, provides a good hardness, strength, and toughness to the steel. In addition, XRD and fractography analysis of the samples were also carried out.

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“…Cast iron with non-uniform mechanical properties can, however, be produced either by using different mould materials or by segmenting the mould [3][4]12]. This is the usual practice asides heat treating processes employed in improving the cast iron properties [6,13]. A novel concept of using cooling tubes incorporated in the mould has, however, showed the possibility of varying the mechanical properties of casted iron without sectioning and employing different mould materials [7].…”

Section: Original Research Articlementioning

confidence: 99%

Cast Iron Cooling Rate Variation Using Cooling Channels: A Numerical Approach

Towoju

2021

JERR

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The cooling rate of molten cast iron can make or mar it. The cooling rate plays a significant role in the resulting mechanical properties of cast iron. It determines the grain growth and size. The mechanical properties of cast iron variation along its length are achieved either with the use of different mold materials or by sectioning to ensure varied cooling rates. Mechanical properties can, however, also be varied along its length without any of these adopted methods by the incorporation of cooling channels in the mould. This study seeks to expand the frontier of this concept with the use of different cooling fluids and fluid flow rate, and numerically investigate the impact on the cooling rate of gray cast iron (class 40). The cooling curve for the cast iron was impacted by the use of different cooling fluids with the attainment of the desired mechanical properties with the selection of an appropriate cooling fluid. Also, the flow rate of the cooling fluid has an impact on the cast iron cooling rate.

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Effects of Heat-Treatment on the Microstructure and Wear Resistance of a High-Chromium Cast Iron for Rolls

Cited by 16 publications

References 14 publications

Role of fracture toughness in impact-abrasion wear

Role of fracture toughness in impact-abrasion wear

Analysing strength, hardness and grain-structure of 0.2%-C steel specimens processed through an identical heating period with different continuous transformation rates

Cast Iron Cooling Rate Variation Using Cooling Channels: A Numerical Approach

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