An Experimental Investigation on Hardness and Microstructure of Heat Treated EN 9 Steel

Biswas, Prosenjit; Kundu, Arnab; Mondal, Dhiraj

doi:10.1088/1757-899x/225/1/012055

Cited by 9 publications

(3 citation statements)

References 3 publications

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“…By the result analysis it was concluded that heat treatment impacts on the mechanical and microstructures. Palash Biswas et al [7] subjected EN9 steel for annealing and normalizing then tempering, the observed results were like, the micro structures of tempered specimens after normalizing process exhibited fine structure, also the hardness values exposed very higher values as compared with as received EN9 steel. Initially as received specimens subjected to annealing, normalizing after that quenching process, and specimens of normalizing process shown satisfactory results.…”

Section: Literaturementioning

confidence: 99%

Effect of Intercriticle Annealing on Impact Energy and Hardness of AISI 1026steel

Ramakrishna¹,

Venkatesh²,

Mahesh³

et al. 2019

IJMEA

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In the advanced planning world, expansive research has incited the improvement of some phenomenal dimensions of steel, every now and again fitting for overhauled limits. Medium carbon steel AISI 1026 is one such assessment, having huge applications in power plants, vehicle and diverse current applications. Diverse warmth treatment forms are utilized to accomplish high hardness and durability, however machinability consequently diminishes. Existing writing isn't adequate to accomplish a harmony among hardness and machinability. The point of this exploratory work is to decide the hardness esteems and durability changes in AISI 1026 steel, when it is exposed to Annealing saw that high toughness value (impact energy) and moderate hardness. Annealed samples oppressed Intercriticle annealing process that implies heated upto upper critical temperature and water quenched. It is seen that the Intercriticle Annealing (ICA) of the specimens after annealing process achieved better results as compared to as received material AISI 1026steel.

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Section: Literaturementioning

confidence: 99%

Effect of Intercriticle Annealing on Impact Energy and Hardness of AISI 1026steel

Ramakrishna¹,

Venkatesh²,

Mahesh³

et al. 2019

IJMEA

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“…To obtain homogeneous austenite from this condition, the steel is to be heated to the stable austenite temperature range and held at that constant temperature for necessary phase alterations (Senthilkumar & Ajiboye, 2012). On cooling and maintaining isothermal condition at the soaking temperature for the critical duration, the dissection of lamellar cementite into dowels or band shapes happens to be the intermediate step of spheroidisation process (Biswas et al, 2017;O'Brien & Hosford, 2002). Protracted time at that temperature enhances further breakup of the pearlitic structure into cementite and cementite reforms slowly into the globular form (Oleg Sherby et al, 1985;Rajan et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

Micro-hardness variation of micro-phases during spheroidisation of AISI4340 steel

et al. 2021

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AISI4340 steel is the medium carbon low-alloy steel has got excellent prominence as a construction material. This steel is spheroidised on heating to the intercritical temperature range by different time intervals with the objective of increasing the number and fineness of the spheroids of cementite particles. A 9 hours, spheroidisation shows better spheroids of cementite particles. To study the effect of initial room temperature structure on spheroidisation primary heat treatments like normalising and hardening are carried out for as-bought steel. Tensile property (yield strength, ultimate tensile strength and percentage elongation), hardness (Rockwell C scale) and micro-structural features and microhardness of micro-phases (ferrite and cementite) are studied. A continuous reduction in the tensile strength, hardness and improvement in ductility, is observed with the increase in spheroidisation time is observed in all the spheroidisation paths. Also, increased spheroidisation time shows a lesser aspect ratio for spheroids. The micro-structure shows partial spheroidisation in all the conditions with more number of spheroids in normalised condition and finer size in Harisha S R ABOUT THE AUTHORS Harisha S R is Assistant Professor in Mechanical & Manufacturing Engineering, MIT, MAHE, Manipal. He has about 9 years of experience in teaching. Sathyashankara Sharma is working as Professor and Head in the Department of Mechanical & Manufacturing Engineering, MIT, MAHE, Manipal. He holds B.E. (Industrial and Production Engineering), M.Tech. (Materials Engineering) and Ph.D. (MaterialsEngineering) degrees. He has 33 years of teaching experience. His area of interest includes Engineering materials, Heat treatment of metals and composites, Machinability and Deformation behaviour of metals and composites. He has published more than 200 papers in journals and conferences.

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“…Biswas et al 24 experimentally analysed the effect of heat treatment on the hardness of EN-9 alloy steel. Furthermore, the authors observed that tempering after heat treatment exhibited a significant decrease in the hardness of investigated material.…”

Section: Introductionmentioning

confidence: 99%

Experimental analysis of mechanical behaviour and residual stresses of EN-36C alloy steel with and without tempering

Maurya

Niranjan

2021

Proceedings of the Institution of Mechanical Engineers, Part E:

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The intense demands of nickel chromium case hardened steel (EN-36C) alloy steel in different engineering applications are increasing day by day due to its cheap and easy availability. The effect of different stages of tempering on EN-36C alloy steel has been carried out to check the mechanical behavioural, microstructural properties and residual stresses in the present work. The effect of tempering on response variables viz., material removal rate, surface roughness, tool tip temperature and residual stresses are evaluated. The cosα method is used to measure the residual stresses in the specimen using two-dimensional detectors such as imaging plates. Further, the influence of tempering on mechanical properties such as tensile strength, hardness, toughness and percentage elongation has been observed. Experimental results depicted that the ductility and toughness are improved without significant change in hardness in the specimen tempered at 500°C. The mechanical properties of specimens tempered at 500°C are found to be a tensile strength of 680.42 MPa, hardness 92 Rockwell hardness of scale B and toughness 187 J. The maximum value of material removal rate (12596.80 mm3/min), minimum tool tip temperature (61.33°C), average surface roughness ( Ra = 1.93, Rq = 2.36, Rz = 10.30) and lowest residual stress 217 MPa are observed in the specimens tempered at 500°C.

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An Experimental Investigation on Hardness and Microstructure of Heat Treated EN 9 Steel

Cited by 9 publications

References 3 publications

Effect of Intercriticle Annealing on Impact Energy and Hardness of AISI 1026steel

Effect of Intercriticle Annealing on Impact Energy and Hardness of AISI 1026steel

Micro-hardness variation of micro-phases during spheroidisation of AISI4340 steel

Experimental analysis of mechanical behaviour and residual stresses of EN-36C alloy steel with and without tempering

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