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The Transformation Behaviour of Certain Alloy Case Hardening Steels.

Sharp, H. J. (1958) The Transformation Behaviour of Certain Alloy Case Hardening Steels. Doctoral thesis, University of Surrey (United Kingdom)..

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The isothermal transformation diagrams have been determined for the case and core campositions of a series of four carburising steels,and the physical properties resulting from various alternative heat-treatment procedures Suggested by the diagrams determined. The dimensional changes occurring during all stages of isothermal heat-treatment have been determined, and the effects of these dimensional changes on the stress developed between the case and core of carburised specimens demonstrated. The most suitable heat-treatment procedures for optimum core properties with adequate case hardness and minimum case/core stress are given. It was noticed that during isothermal transformation of certain of the cose compositions, changes in as-quenched hardness occurred before the commencement of transformation. This behaviour appeared to be associated with the presence of carbon and carbide forming elements. The investigations were therefore extended to include a series of chroma molybdenum hot-work steels having varying tungsten and vanadium contents. By plotting the hardness values obtained on the isothermal transformation specimens on a perspective summary diagram for each steel composition, three types of behaviour were shown, and an explanation is proposed for these alternative behaviour patterns.

Item Type: Thesis (Doctoral)
Divisions : Theses
Authors :
Sharp, H. J.
Date : 1958
Contributors :
Additional Information : Thesis (Ph.D.)--University of Surrey (United Kingdom), 1958.
Depositing User : EPrints Services
Date Deposited : 22 Jun 2018 15:15
Last Modified : 06 Nov 2018 16:54

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