| 稀土对0.27C—1Cr钢TTT图的影响 |
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| 引用本文： | 吕伟,郑登慧,徐祖耀.稀土对0.27C—1Cr钢TTT图的影响[J].金属学报,1993,29(7):23-27. |
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| 作者姓名： | 吕伟 郑登慧 徐祖耀 |
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| 作者单位： | 上海交通大学，上海交通大学，上海交通大学材料科学系 |
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| 基金项目： | 冶金工业部科技司的资助 |
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| 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,理论计算结果与实验值一致
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| 关 键 词： | 0.27C－1Cr钢 稀土 等温相变 TTT图 |
| 收稿时间： | 1993-07-18 |
| 修稿时间： | 1993-07-18 |
INFLUENCE OF RARE EARTH ON TTT DIAGRAM FOR 0.27C-1Cr STEEL |
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| LU Wei,ZHENG Denghui,XU Zuyao Shanghai Jiao Tong University.INFLUENCE OF RARE EARTH ON TTT DIAGRAM FOR 0.27C-1Cr STEEL[J].Acta Metallurgica Sinica,1993,29(7):23-27. |
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| Authors: | LU Wei ZHENG Denghui XU Zuyao Shanghai Jiao Tong University |
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| Affiliation: | LU Wei,ZHENG Denghui,XU Zuyao Shanghai Jiao Tong UniversityDepartment of Materials Science,Shanghai JiaoTong University,Shanghai . |
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| Abstract: | 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. |
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| Keywords: | Rare earth TTT diagram 0 27C-1Cr Steel isothermal transformation |
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