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Influence of Super Carburization on the Roller Pitting Fatigue Life of 0.16C-0.60Si-2.00Cr-0.34Mo Steel

Jungho Shin, Woon-Jae Lee, Young-Pyo Kim, In-Yong Ko

Open publisher page 5 citations

Abstract

In this study, a super carburizing treatment was applied to improve roller pitting fatigue life. It produced excellent properties of surface hardness and temper softening resistance by forming precipitation of fine and spherodized carbides on a tempered marstensite matrix through the repeated process of carburization and diffusion after high temperature carburizing step 1. The cycle II performed two times carburizing/diffusion cycle (process) after super carburization at 1,000°C had fine and spherodized carbides to subsurface 200 μm. In this case, the carbide was (Fe,Cr)3C and there was not any massive carbides. In the case of Cycle II, the roller pitting fatigue life had a 6.15 million cycles. It was improved 48% compared to normal gas carburizing treatment. (Received March 14, 2012)

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What this paper is about

In this study, a super carburizing treatment was applied to improve roller pitting fatigue life. It produced excellent properties of surface hardness and temper softening resistance by forming precipitation of fine and spherodized carbides on a tempered marstensite matrix through the repeated process of carburization and diffusion after high temperature carburizing step 1. The cycle II performed two times carburizing/diffusion cycle (process) after super carburization at 1,000°C had fine and spherodized carbides to subsurface 200 μm. In this case, the carbide was (Fe,Cr)3C and there was not any massive carbides. In the case of Cycle II, the roller pitting fatigue life had a 6.15 million cycles. It was improved 48% compared to normal gas carburizing treatment. (Received March 14, 2012)

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Available abstract

In this study, a super carburizing treatment was applied to improve roller pitting fatigue life. It produced excellent properties of surface hardness and temper softening resistance by forming precipitation of fine and spherodized carbides on a tempered marstensite matrix through the repeated process of carburization and diffusion after high temperature carburizing step 1. The cycle II performed two times carburizing/diffusion cycle (process) after super carburization at 1,000°C had fine and spherodized carbides to subsurface 200 μm. In this case, the carbide was (Fe,Cr)3C and there was not any massive carbides. In the case of Cycle II, the roller pitting fatigue life had a 6.15 million cycles. It was improved 48% compared to normal gas carburizing treatment. (Received March 14, 2012)

Key concepts: Materials science, Metallurgy, Forensic engineering, Engineering

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Influence of Super Carburization on the Roller Pitting Fatigue Life of 0.16C-0.60Si-2.00Cr-0.34Mo Steel — Research Paper | ScholarLens