Microstructure Changes of Steel Materials under Isothermal Heat Treatment in Salt Bath

Kešner, A.; Chotěborský, R.

doi:10.1515/sab-2017-0023

Cited by 2 publications

(2 citation statements)

References 37 publications

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“…SEM and X-Ray method was used to study wear tracks and debris. The results showed that, [18] have studied about the isothermal heat treatment of steel in salt bath and its effect on microstructural changes of the steel. Sample was heat treated by hardening at 1200° C and 1020° C and tempered at 550° C and 500° C. Air and oil were used as the quenching media.…”

Section: E) Microwave Heat Treatmentmentioning

confidence: 99%

Effect of Heat Treatment Processes on Metals and Alloys-A Review

Bharti¹,

Arora²,

Singh³

et al. 2020

IJAPIE

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Heat treatment can be simply defined as heating, holding, and cooling of materials. The current review paper presents the various types of heat treatment processes done on the different metals and alloys. A comparative analysis of the effect of heat treatment on hard-ness, yield strength, and microstructure, etc. of the various metals and alloys has been presented in this paper. The literature has shown that the heat treatment resulted in the development of new phases along with the improvement of microstructural and mechanical properties of various metals and alloys. The paper also represents the consequence of microwave heat treatment done on various substrates. The final part of the paper discusses the suggested future work that can be done.

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Section: E) Microwave Heat Treatmentmentioning

confidence: 99%

Effect of Heat Treatment Processes on Metals and Alloys-A Review

Bharti¹,

Arora²,

Singh³

et al. 2020

IJAPIE

View full text Add to dashboard Cite

show abstract

“…[ 27 ] Kešner et al found that the size of carbides is affected by hardening in a salt bath under isothermal conditions at temperatures between 300 and 650 °C, which is in the temperature regime of the transformation gap of high‐speed steels. [ 28 ] However, previous works have paid no attention to the effect of different heat treatment parameters on the shape of eutectic carbides. Our preliminary work shows that isothermal holding actually influences the morphology of the carbides in the temperature regime of the transformation gap.…”

Section: Introductionmentioning

confidence: 99%

Influence of Heat Treatment Parameters on the Carbide Morphology of PM High‐Speed Steel HS 6‐5‐3‐8

Disch

Benito

Röttger

et al. 2023

steel research int.

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Cutting tools are commonly made of high-speed steel to simultaneously fulfill the requirements regarding hardness, strength, and toughness. The microstructure of high-speed steel alloys in as-cast condition is characterized by a microstructure consisting of a metal matrix and eutectic carbides. [1][2][3][4] The further manufacturing route of these materials comprises hot forming to break down the carbide network [1,2] and subsequent heat treatment. The behavior of the carbides during austenitization was examined in several publications. [3][4][5][6][7][8][9] Metastable carbides with the stoichiometry M 2 C (M¼ metal atoms, C ¼ carbon), which are present after casting, are transformed to carbides of the types MC and M 6 C with the transformation path of [3,[10][11][12] Dependent on the austenitization temperature and time and thus on the amount of dissolved carbides, different contents of retained austenite remain after quenching. [9] During typical subsequent tempering at temperatures where a secondary hardening effect occurs, retained austenite decomposes, and the precipitation of finely dispersed tempering carbides occurs. [13][14][15] Besides the conventional production route with casting and hot forming, alternative manufacturing processes like spray forming [16][17][18] or powder metallurgy (PM) with hot isostatic pressing are available. Several studies found that powder metallurgic high-speed steel exhibit higher toughness and better cutting performance compared to cast material. [19][20][21][22][23] In most cases, this is explained by the finer distribution, the isotropic properties, and the more regular shape of the eutectic carbides due to the rapid solidification of the powder particles during powder manufacturing. The carbides are affected in their type, [8] size, [5,24] and distribution [25] by the process variables during primary manufacturing and different heat treatments. Mishnaevsky et al. have shown that the fracture in tool steels typically starts in or along eutectic carbides. [26] It is, therefore, to be assumed that the morphology of the eutectic carbides must have an influence on the mechanical properties of high-speed steels.High-speed steel alloys typically exhibit a transformation gap in the isothermal time-temperature-transformation (TTT) diagram. The scientific consensus is that no transformation of the metastable austenite takes place in the temperature regime of the transformation gap. [27] Kešner et al. found that the size of carbides is affected by hardening in a salt bath under isothermal conditions at temperatures between 300 and 650 °C, which is in the temperature regime of the transformation gap of high-speed steels. [28] However, previous works have paid no attention to the effect of different heat treatment parameters on the shape of eutectic carbides. Our preliminary work shows that isothermal

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Microstructure Changes of Steel Materials under Isothermal Heat Treatment in Salt Bath

Cited by 2 publications

References 37 publications

Effect of Heat Treatment Processes on Metals and Alloys-A Review

Effect of Heat Treatment Processes on Metals and Alloys-A Review

Influence of Heat Treatment Parameters on the Carbide Morphology of PM High‐Speed Steel HS 6‐5‐3‐8

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