THE INFLUENCE OF CARBON CONTENT AND COOLING RATE ON THE TOUGHNESS OF Mn-Mo-Ni LOW-ALLOY STEELS
Mn-Mo-Ni low-alloy steels are widely used in the manufacture of nuclear pressure vessels.This article studied the influence of carbon content and cooling rate on the toughness of Mn-Mo-Ni low-alloy steel.Experiment results indicated that the toughness of this low-alloy steel imporved as the carbon content decreases or the cooling rate increases.Detailed microscopic analysis showed that though more ferrite forms as carbon content goes down,the size of carbides become smaller which decreases the possibility of formation of crack.The growth of cooling rate results in the transition from bainite to martensite,and the decrease in size of both carbides and lath,which make respectively the formation and propagation of crack more difficult.This study provides basis for determining composition and processing of Mn-Mo-Ni low-alloy steels with high toughness.
Mn-Mo-Ni low-alloy steel carbon content cooling rate strength toughness
Huibin LIU Hanqian ZHANG
Baosteel Research Institute,889 Fujing Rd.,Shanghai,201900,P.R.China
国内会议
杭州
英文
247-252
2015-11-11（万方平台首次上网日期，不代表论文的发表时间）