| 2000 №08 (13) | 2000 №08 (01) |
The Paton Welding Journal, 2000, #8, 53-57 pages
Electron beam braze welding of compressor impellers
L.W. Myers1, G. Laflamme2
1Dresser-Rand Co., USA2PTR-Precision Technologies, Inc., USA
Abstract
The development of a unique welding process which combines electron beam welding and brazing in one operation is described for application to centrifugal compressor impellers. The first phase of the testing program (reported in this paper) consisted of welding T-samples to develop welding conditions, axial and bending fatigue, metallurgical investigation, and hardness testing. Upon completion of testing, prototype impellers were fabricated to prove the process on production parts, and these impellers were also destructively examined after overspeed testing. All test results have been excellent, and the process is being used to produce impellers.
Keywords: electron beam braze welding, compressor impellers, fillet weld, slot weld
References
1. (1991) Welding Handbook. Ed. by R.L. O’Brien. AWS.2. (1962) A guide for fatigue testing and the statistical analysis of fatigue data. Committee E-9 on Fatigue. ASTM.
3. Tolle, M.C., Kassner, M.E., Cerri, E. et al. (1995) Mechanical behavior and microstructure of Au-Ni Brazes. Metallurgical and Materials Transaction A, 4, 941.