摘要
采用钴基钎料及镍基合金粉料,在1 170℃保温60 min的钎焊工艺下,对K452镍基铸造高温合金进行了45°坡口对接试样真空钎焊实验,通过扫描电镜和能谱分析仪分析了接头显微组织观察与物相,并进行了钎焊接头的高温性能测试。实验结果表明,钎焊接头界面结合良好,钎缝组织主要以固溶体为主,钎料组织填充于镍基合金粉颗粒间并存在小块状白色化合物,细小颗粒状化合物弥散分布于合金粉填料颗粒内部;钎焊接头900℃抗拉强度达到400 MPa,900℃/100 MPa持久寿命为133 h37 min。
Vacuum brazing of K452 superalloy 45° groove specimens was carried out with cobalt-base filler metal and nickel-base superalloy powder under a brazing condition of 1 170 ℃ heat preservation 60 min. The microstructure of the brazed joints was analyzed by means of SEM and EDS,and the mechanical properties were tested. The results showed that brazed joints were achieved and the brazing seam bases on solid solution with some small white blocks of compounds distributed between Ni-base superalloy powder and small particles precipitated homogeneously inside the superalloy powder. The brazed joints showed an average 900 ℃tensile strength of 400 MPa,and the 900 ℃/100 MPa stress-rupture life got up to 133 h37 min.
出处
《电焊机》
2015年第2期7-10,共4页
Electric Welding Machine
关键词
K452合金
钴基钎料
镍基合金粉
组织
性能
K452 superalloy
cobalt-base filler metal
nickel-base superalloy powder
microstructure
mechanical property
