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2007•Materials for Mechanical EngineeringRequires access

Effect of Vanadium-niobium Microalloying on Properties of Cr-Ni-Mo Heavy-duty Gear Steel

Zhang Wen-han, Wang Mao-qit, Jie Shi, Weijun Hui, Han Dong, Run Wu

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Abstract

Cr-Ni-Mo heavy-duty gear steel was microalloyed with vanadium and niobium,and the microstructure after quenching and carburizing as well as mechanical properties before and after microalloying were compared.The austenite grains of the test steel are significantly refined after the microalloying process.The impact energy is also increased with the decrease of the austenite grain size.The vanadium/niobium microalloyed steel do not show abnormal coarsening of austenite grains when it was austenitized in the temperature range of carburization for a long time,and the mechanical properties of the carburizing phase are also improved.

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What this paper is about

Cr-Ni-Mo heavy-duty gear steel was microalloyed with vanadium and niobium,and the microstructure after quenching and carburizing as well as mechanical properties before and after microalloying were compared.The austenite grains of the test steel are significantly refined after the microalloying process.The impact energy is also increased with the decrease of the austenite grain size.The vanadium/niobium microalloyed steel do not show abnormal coarsening of austenite grains when it was austenitized in the temperature range of carburization for a long time,and the mechanical properties of the carburizing phase are also improved.

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Available abstract

Cr-Ni-Mo heavy-duty gear steel was microalloyed with vanadium and niobium,and the microstructure after quenching and carburizing as well as mechanical properties before and after microalloying were compared.The austenite grains of the test steel are significantly refined after the microalloying process.The impact energy is also increased with the decrease of the austenite grain size.The vanadium/niobium microalloyed steel do not show abnormal coarsening of austenite grains when it was austenitized in the temperature range of carburization for a long time,and the mechanical properties of the carburizing phase are also improved.

Key concepts: Niobium, Materials science, Metallurgy, Vanadium, Austenite, Carburizing, Microstructure, Microalloyed steel

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Effect of Vanadium-niobium Microalloying on Properties of Cr-Ni-Mo Heavy-duty Gear Steel — Research Paper | ScholarLens