Carbide dispersion carburizing (CDC) of Fe-Mo-V based high-speed steels

Ikuo Ohnuma; Ryosuke Kainuma; Kiyohito Ishida

doi:10.2355/isijinternational.46.310

Carbide dispersion carburizing (CDC) of Fe-Mo-V based high-speed steels

Ikuo Ohnuma, Ryosuke Kainuma, Kiyohito Ishida

ENG - Metallurgy

Tohoku University

Research output: Contribution to journal › Article › peer-review

3 Citations (Scopus)

Abstract

The carbide dispersion carburizing process was applied to Fe-based high-speed steels, which contained multiple carbide-forming elements, Mo and V. Fine carbides precipitated during the carburization and the dispersed particles in the Fe-Mo-V-C alloys heat-treated at 1 200°C were identified as VC, (Mo, V)2C, and (Fe,Mo)₆C, which behave as effective inhibitors against the grain growth of austenite and as reinforcers resulting in increased hardness of the martensitic matrix. The maximum Vickers hardness of the Fe-10Mo5V-2.05C alloy quenched from 1 200°C and tempered at 600°C achieved values of 1 100 and 1 000, respectively. Thermodynamic calculation of the Fe-Mo-V-C quaternary system proved to be useful for optimizing the composition of carbide forming elements, the carburizing conditions, and the microstructure of carburized and solution-treated alloys.

Original language	English
Pages (from-to)	310-315
Number of pages	6
Journal	ISIJ International
Volume	46
Issue number	2
DOIs	https://doi.org/10.2355/isijinternational.46.310
Publication status	Published - 2006

Keywords

CALPHAD
Carbide
Carburization
Heat treatment
High-speed steel
Phase diagram

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10.2355/isijinternational.46.310

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title = "Carbide dispersion carburizing (CDC) of Fe-Mo-V based high-speed steels",

abstract = "The carbide dispersion carburizing process was applied to Fe-based high-speed steels, which contained multiple carbide-forming elements, Mo and V. Fine carbides precipitated during the carburization and the dispersed particles in the Fe-Mo-V-C alloys heat-treated at 1 200°C were identified as VC, (Mo, V)2C, and (Fe,Mo)6C, which behave as effective inhibitors against the grain growth of austenite and as reinforcers resulting in increased hardness of the martensitic matrix. The maximum Vickers hardness of the Fe-10Mo5V-2.05C alloy quenched from 1 200°C and tempered at 600°C achieved values of 1 100 and 1 000, respectively. Thermodynamic calculation of the Fe-Mo-V-C quaternary system proved to be useful for optimizing the composition of carbide forming elements, the carburizing conditions, and the microstructure of carburized and solution-treated alloys.",

keywords = "CALPHAD, Carbide, Carburization, Heat treatment, High-speed steel, Phase diagram",

author = "Ikuo Ohnuma and Ryosuke Kainuma and Kiyohito Ishida",

year = "2006",

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TY - JOUR

T1 - Carbide dispersion carburizing (CDC) of Fe-Mo-V based high-speed steels

AU - Ohnuma, Ikuo

AU - Kainuma, Ryosuke

AU - Ishida, Kiyohito

PY - 2006

Y1 - 2006

N2 - The carbide dispersion carburizing process was applied to Fe-based high-speed steels, which contained multiple carbide-forming elements, Mo and V. Fine carbides precipitated during the carburization and the dispersed particles in the Fe-Mo-V-C alloys heat-treated at 1 200°C were identified as VC, (Mo, V)2C, and (Fe,Mo)6C, which behave as effective inhibitors against the grain growth of austenite and as reinforcers resulting in increased hardness of the martensitic matrix. The maximum Vickers hardness of the Fe-10Mo5V-2.05C alloy quenched from 1 200°C and tempered at 600°C achieved values of 1 100 and 1 000, respectively. Thermodynamic calculation of the Fe-Mo-V-C quaternary system proved to be useful for optimizing the composition of carbide forming elements, the carburizing conditions, and the microstructure of carburized and solution-treated alloys.

AB - The carbide dispersion carburizing process was applied to Fe-based high-speed steels, which contained multiple carbide-forming elements, Mo and V. Fine carbides precipitated during the carburization and the dispersed particles in the Fe-Mo-V-C alloys heat-treated at 1 200°C were identified as VC, (Mo, V)2C, and (Fe,Mo)6C, which behave as effective inhibitors against the grain growth of austenite and as reinforcers resulting in increased hardness of the martensitic matrix. The maximum Vickers hardness of the Fe-10Mo5V-2.05C alloy quenched from 1 200°C and tempered at 600°C achieved values of 1 100 and 1 000, respectively. Thermodynamic calculation of the Fe-Mo-V-C quaternary system proved to be useful for optimizing the composition of carbide forming elements, the carburizing conditions, and the microstructure of carburized and solution-treated alloys.

KW - CALPHAD

KW - Carbide

KW - Carburization

KW - Heat treatment

KW - High-speed steel

KW - Phase diagram

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EP - 315

JO - ISIJ International

JF - ISIJ International

IS - 2

ER -

Carbide dispersion carburizing (CDC) of Fe-Mo-V based high-speed steels

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Keywords

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