Izvorni znanstveni članak
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
Sažetak
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.
Ključne riječi
pretreatment process; quenching; zero-time-holding; mechanical properties
Hrčak ID:
122366
URI
Datum izdavanja:
4.6.2014.
Posjeta: 1.665 *