Simulation of coarsening of inter-lath cementite in a Q&amp;T steel during tempering

Ju, Yulin; Davis, Claire; Strangwood, Martin

doi:10.1080/02670836.2020.1790097

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Effect Of Tempering Temperature and Time On Carbide Coarsening1

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2023

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“…The above theoretical calculations assumed spherical shaped carbide particles [27], whereas the Fe-based carbides in the tempered P110 steels, especially M 23 C 6 , were typically elongated. A spherical equivalent diameter was calculated to comply with the assumption, which introduced bias into the analysis.…”

Section: Effect Of Tempering Temperature and Time On Carbide Coarseningmentioning

confidence: 99%

The effect of tempering conditions on carbides in P110 casing steels

Yang

Wiskel

Ivey

et al. 2023

Materials Science and Technology

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The effect of tempering conditions on the carbides in P110 casing steels with two different Cr compositions was studied. Local Mo and Cr concentrations varied from the nominal compositions by ≈± 0.05 wt-% Mo and ≈± 0.07 wt-% Cr. The size of the fine (<20 nm) MC carbides remained relatively unaffected by tempering. Fe-based carbides exhibited a large increase in mean log-normal size from 65 to 102 nm when tempered at 650 and 715°C for 45 min, respectively. This rapid carbide coarsening is attributed to the dissolution of M23C6 carbides at 715°C. Associated with this significant increase in carbide size was an increase in the rate of hardness reduction with increasing Hollmon-Jaffe parameter for temperatures above 650°C.

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Section: Effect Of Tempering Temperature and Time On Carbide Coarseningmentioning

confidence: 99%