摘要
通过测量不同温度下的等温转变曲线,建立了0.27C—1Cr钢的TTT图,研究了稀土对TTT图的影响,结果表明,加入稀土后,奥氏体晶粒细化,晶粒长大速率变慢,Ac_2不变,Ac_3升高;先共析铁素体和贝氏体相变的孕育期缩短,珠光体和贝氏体相变完成所需时间延长。
TTT diagrams of the 0.27C-1Cr and 0.27C-1Cr-RE steels are established
by means of dilatometric measurement for kinetic curves at different temperatures and
metallographic inspections, and the influence of RE on the TTT diagram is studied. The addi-
tion of RE refines austenite grains, retards grain growth rate, raises Ac_3 and makes no change
to Ac_1. The incubation periods for proeutectoid ferrite and bainite are reduced, and the time
for complete transformation for pearlite and bainite are prolonged by the addition of RE. The
computation result are in comformity with the experimental ones.
出处
《金属学报》
SCIE
EI
CAS
CSCD
北大核心
1993年第7期A307-A311,共5页
Acta Metallurgica Sinica
基金
冶金工业部科技司的资助
