FeAl-316SS接头的反应行为、显微组织与力学性能
Reaction behavior,microstructure,and mechanical properties of FeAl-316 stainless steel joints
蔡小平 1尹进南 2张志鹏 1冯培忠1
作者信息
- 1. 中国矿业大学材料与物理学院,徐州 221116
- 2. 中国人民解放军空军 93147 部队,成都 610000
- 折叠
摘要
采用热爆反应与粉末冶金相结合的工艺实现了FeAl金属间化合物与 316不锈钢(316SS)的有效连接,研究了连接温度(700、800、900℃)对界面成分组成和力学性能的影响.结果表明,当加热到 637℃时,FeAl反应层温度瞬间升高到1050℃,发生明显的热爆反应,并伴随持续约 15s的剧烈放热.随着温度从 700℃提高到 900℃,界面由 Fe-316SS、316SS(Al)交替组成的形式转变为由FeAl-316SS(Al)-316SS组成.三种温度下均形成良好的冶金结合,当连接温度为 800℃时,抗剪切强度可达75 MPa.
Abstract
The effective joining between the FeAl intermetallic compounds and the 316 stainless steels was realized by the combination of thermal explosion reaction and powder metallurgy.The effect of joining temperature(700,800,900℃)on the interface composition and mechanical properties were studied.The results show that,the temperature of FeAl reaction layer rises to 1050℃instantaneously when it is heated to 637℃,and the obvious thermal explosion reaction occurs,accompanied by the intense heat release lasting about 15 s.With the increase of joining temperature from 700℃to 900℃,the interface is composed of Fe-316SS and 316SS(Al)alternately,which is transformed into FeAl-316SS(Al)-316SS.Sound metallurgical bonding is formed at all these three temperatures.When the joining temperature is 800℃,the shear strength reaches 75 MPa.
关键词
铁铝金属间化合物/316不锈钢/粉末冶金/异种材料连接/力学性能Key words
FeAl intermetallics/316 stainless steels/powder metallurgy/dissimilar joining/mechanical properties引用本文复制引用
基金项目
国家自然科学基金资助项目(51611130064)
出版年
2024
国家科技期刊平台
NSTL
万方数据