TIG Repairing on Directionally Solidified Superalloy DZ125

QU Shen; LIU Jide; SONG Wenqing; LI Ying; SUN Yuan; LI Bo; HOU Xingyu; ZHOU Guannan

doi:10.16080/j.issn1671-833x.2018.08.043

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TIG Repairing on Directionally Solidified Superalloy DZ125

更新时间：2025-10-30

- TIG Repairing on Directionally Solidified Superalloy DZ125
- Aeronautical Manufacturing Technology Vol. 61, Issue 8, Pages: 43-47(2018)
- 作者机构：
  
  1. 中国航发沈阳黎明航空发动机有限责任公司,沈阳,110043
  2. 中国科学院金属研究所高温合金研究部,沈阳,110016
- 作者简介：
- 基金信息：
- DOI：10.16080/j.issn1671-833x.2018.08.043
  CLC：
- Published：2018
- 稿件说明：
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曲伸，刘纪德，宋文清，李英，孙元，李博，侯星宇，周冠男. DZ125定向凝固高温合金氩弧焊修复工艺研究[J]. 航空制造技术, 2018, 61(8): 43-47.

QU Shen, LIU Jide, SONG Wenqing, LI Ying, SUN Yuan, LI Bo, HOU Xingyu, ZHOU Guannan. TIG Repairing on Directionally Solidified Superalloy DZ125[J]. Aeronautical Manufacturing Technology, 2018, 61(8): 43-47.
曲伸，刘纪德，宋文清，李英，孙元，李博，侯星宇，周冠男. DZ125定向凝固高温合金氩弧焊修复工艺研究[J]. 航空制造技术, 2018, 61(8): 43-47. DOI： 10.16080/j.issn1671-833x.2018.08.043.

QU Shen, LIU Jide, SONG Wenqing, LI Ying, SUN Yuan, LI Bo, HOU Xingyu, ZHOU Guannan. TIG Repairing on Directionally Solidified Superalloy DZ125[J]. Aeronautical Manufacturing Technology, 2018, 61(8): 43-47. DOI： 10.16080/j.issn1671-833x.2018.08.043.

摘要

DZ125合金具有良好的中温、高温综合性能和优异的疲劳性能，被广泛用于燃气轮机工作叶片和导向叶片。针对零件实际使用过程中出现的使役缺陷等问题，介绍了采用钨极氩弧焊（TIG）的方法焊接修复DZ125合金的研究进展。研究结果表明，采用传统焊接材料修复后，热影响区碳化物等位置易于产生热裂纹，焊缝硬度较低。针对上述试验结果，设计开发了一种新型焊接材料，采用此新型焊接材料和恰当的焊接与热处理工艺，可有效避免热影响区裂纹产生，接头微观组织较均匀，1000℃拉伸强度达到母材90%，可以满足DZ125合金使用要求。

Abstract

Because of excellent creep resistances and fatigue properties both in medium and high temperature

the directionally solidified superalloy DZ125 alloy has been widely used as turbine blades and guide vanes in engineering. In this paper

the repairing process of DZ125 alloy was discussed. The results showed that there were many HAZ cracks formed by using common welding materials. Then a kind of now welding alloy was developed and after proper welding and heat treatments no cracks were found in the joints. The microstructures of the joints were also homogeneous and the tensile strengths of the joints were 90% of that of DZ125 alloy.

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