BT36高温钛合金的成分特点及组织研究

Study on Composition Character and Microstructure of ВТ36 High Temperature Ti Alloy

采用金相观察和扫描能谱分析的方法,测定了ВТ36合金的α+ββ相转变温度和组织中不同区域的成分。结果表明:ВТ36合金的α+ββ相转变温度为980℃。其轧棒经过两相区热处理可获得等轴组织,同时存在片层状的β转变组织。经测定,与周围等轴基体相比,片层中Al含量偏低,而Mo、W含量偏高,这是由于合金在熔炼时合金元素没有得到充分地均匀化。

The β transus temperature and the composition at different areas in ВТ36 ware determined by means of optical metallographic observation and SEM in this paper The results show that the β transus temperature of ВТ36 alloy is 980℃ and some lamellar structures are located at equiaxial matrix after α+β phase area heat treated The lamella has lower aluminium and higher molybdenum and tungsten content compared to the matrix due to the alloying elements can′t be homogeneously distributed in the course of melting