B-Ni55NbCoWCrAlSiMo(C)-S钎料钎焊IC10合金接头的组织和性能

Microstructure and mechanical properties of IC10 alloy brazed joints by B-Ni55NbCoWCrAlSiMo(C)-S brazing filler metal

  • 摘要:
    目的 旨在研究采用B-Ni55NbCoWCrAlSiMo(C)-S钎料(B-Ni55钎料)钎焊IC10合金接头的组织和性能。
    方法 采用B-Ni55钎料,在1 225 ℃/30 min钎焊工艺及不同间隙下开展了IC10高温合金的钎焊研究,分析了接头的组织和力学性能。
    结果 结果表明,钎焊过程中钎料与母材之间发生了较强的界面反应,在1.6 mm较大间隙下仍可形成完整钎焊接头。
    结论 0.05 mm间隙下获得的钎焊接头在980 ℃/75 MPa条件下平均持久寿命为99.5 h,且随钎焊间隙的增加,持久寿命呈降低趋势。

     

    Abstract: Objective The aim was to study microstructure and mechanical properties of IC10 alloy brazed joints by B-Ni55NbCoWCrAlSiMo(C)-S brazing filler metal (B-Ni55 brazing filler metal). Methods Brazing experiments of IC10 superalloy were conducted by B-Ni55 brazing filler metal at brazing temperature of 1 225 ℃ for 30 min with different clearances, and microstructure and mechanical properties of brazed joints were analyzed. Results The results indicated that a strong interfacial reaction occurred between brazing filler metal and base metal during the brazing process. Complete brazed joints could still be formed even with a large clearance of 1.6 mm. Conclusion The average stress rupture life of brazed joints obtained at a clearance of 0.05 mm was 99.5 h under the condition of 980 ℃/75 MPa, and rupture life showed a decreasing trend with the increase of brazing clearance.

     

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