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Engineering Review : International journal for publishing of original researches from the aspect of structural analysis, materials and new technologies in the field of mechanical engineering, shipbuilding, fundamental engineering sciences, computer sciences, electrical engin, Vol. 34 No. 2, 2014.

Original scientific paper

Effect of pre-quenching and pre-normalization on microstructures and mechanical properties of 40Cr steel after zero-time-holding quenching

Anming Li ; henan polytechnic university

Full text: english PDF 594 Kb

page 69-74

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Abstract

Pre-quenchingand pre-normalization are selected as pre-treatment processes. Microstructures, the tensile strengthand hardness of zero-time-holding quenched 40Cr steel with differentpre-treatment are investigated. The results show that the zero-time-holding40Cr steel quenched by pre-quenching is fine martensite and exhibits highertensile strength and hardness than that with pre-normalization. The mechanical properties of the zero-time-holding 40Cr steel quenched by pre-quenching are better than that with pre-normalization. The effect of pre-treatment on the mechanical properties of zero-time-holding quenched 40Cr steel becomes prominent when the zero-time-holding quenching temperature decreases. The mechanical properties of zero-time-holding 40Cr steel quenched at 860-890℃ can be improved with austenite inverse transformation.

Keywords

pretreatment process; quenching; zero-time-holding; mechanical properties

Hrčak ID:

122366

URI

https://hrcak.srce.hr/122366

Publication date:

4.6.2014.

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