Experimental Study and Application of Temperature-Controlled Quenching for Q960E Ultra High Strength Steel Plates

doi:10.12068/j.issn.1005-3026.2022.11.007

Abstract

Abstract: The influence of temperature-controlled quenching and conventional quenching on the microstructure and mechanical properties of Q960E ultra-high-strength steel plates， with a thickness of 20， 30 and 40mm， was analyzed using the roller-type jet quenching facility. The microstructure and properties of steel plates under two quenching process conditions were obtained. The results revealed that， when the quenching termination temperature is 40℃， more than 40% of the water consumption can be saved. The surface quality of quenched plates is significantly improved and the flatness is ≤3mm/m. The microstructure of the experimental steel plates processed by temperature-controlled quenching consists of auto-tempered martensite， which is different from the conventional roller-type quenching. The steel plates exhibit excellent comprehensive mechanical properties after temperature-controlled quenching with an average Vickers hardness of ≥420， yield strength of >980MPa， tensile strength of >1000MPa， elongation of >14%. The impact energy is more than 44 J at -40℃.

Key words: ultra-high-strength steel plate; temperature-controlled quenching; final cooling temperature; conventional roller-type quenching; microstructural and mechanical properties

CLC Number:

TG156.31

YANG Sen-yu， FU Tian-liang， ZHU Mei-jun， WANG Zhao-dong. Experimental Study and Application of Temperature-Controlled Quenching for Q960E Ultra High Strength Steel Plates[J]. Journal of Northeastern University(Natural Science), 2022, 43(11): 1570-1574.

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