IC10高温合金大间隙钎焊接头组织与力学性能研究
Microstructure and Properties of Large Gap Brazing Joint of IC10 Superalloy
邱嘉玉 1丁宁 2张元伟 1毛唯 1任新宇1
作者信息
- 1. 中国航发北京航空材料研究院,北京 100095
- 2. 空军装备部驻北京地区第六军事代表室,北京 101300
- 折叠
摘要
针对航空发动机涡轮热端部件的焊接制造需求,开展了定向凝固高温合金IC10 的大间隙钎焊工艺研究.结果表明,采用Ni-Nb-W-Co-Cr-Al合金钎料在不同间隙内预填高温合金粉末,在 1225℃/30 min钎焊条件下可获得冶金质量良好的IC10 合金大间隙钎焊接头.当钎焊间隙为 0.2 mm时,接头在 980℃/75 MPa下的平均持久寿命为 44.56 h,随钎焊间隙增大,接头高温持久寿命逐渐下降.从接头断口分析来看,接头中的脆性化合物相为薄弱相,易萌生裂纹,从而诱发断裂.
Abstract
Focus on the requirements of aero-engine turbine guide vane manufacturing,the joining of directionally solidified IC10 superalloy was studied.The results show that,when using Ni-Nb-W-Co-Cr-Al based filler alloy,combined with superalloy power pre-filled into the brazing seam,the IC10 joints with good quality can be obtained under the brazing condition of 1225℃/30 min.With the thickness of brazing seam of 0.2 mm,the average creep rupture life can reach up to 44.56 h at 980℃/75 MPa.As the brazing gap increases,creep rupture life of the joint gradually decreased.According to the fracture of the joint after creep rupture test,it can be seen that the brittle phases within the joint was the weak link,and the crack easily initiated from these phases.
关键词
IC10高温合金/钎焊/接头/显微组织/力学性能Key words
IC10 superalloy/Braze/Joints/Microstructure/Mechanical property引用本文复制引用
出版年
2024
NETL
NSTL
万方数据