Details
| Original language | English |
|---|---|
| Pages (from-to) | 72-76 |
| Number of pages | 5 |
| Journal | Procedia CIRP |
| Volume | 59 |
| Publication status | Published - 2 Mar 2017 |
| Event | 5th International Conference on Through-life Engineering Services, TESConf 2016 - Cranfield, United Kingdom (UK) Duration: 1 Nov 2016 → 2 Nov 2016 |
Abstract
Besides welding, high temperature vacuum repair-brazing is already established for nickel-based alloy turbine blades in the aerospace and power plant industries. After the worn turbine blade has been decoated to its substrate material, the filler metal is deposited as a paste, (melt-spin) foil or tape which also consists of a nickel-based alloy. Following this, the hot-gas corrosion protective coating (e.g. NiCoCrAlY) is applied using thermal spraying. The brazed turbine blade is ground or milled to size and subsequently aluminized to further increase its corrosion resistance. Using the current state of technology, a turbine blade can undergo approximately 3 to 4 repair cycles. In the present study, the development of a two-stage hybrid technology for repairing turbine blades is considered which incorporates, on the one hand, a process technology and manufacturing aspects and, on the other hand, considers material-technological mechanisms. During the first stage of this hybrid technology, the filler metal together with the hot-gas corrosion protective coating is applied using thermal spraying. The subsequent second stage combines the brazing and aluminizing processes. The technology developed here brings technical and economic advantages whilst enabling the current state-of-the-art's corresponding process chain for repairing turbine blades to be shortened.
Keywords
- aluminizing, repair-brazing, thermal spraying
ASJC Scopus subject areas
- Engineering(all)
- Control and Systems Engineering
- Engineering(all)
- Industrial and Manufacturing Engineering
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In: Procedia CIRP, Vol. 59, 02.03.2017, p. 72-76.
Research output: Contribution to journal › Conference article › Research › peer review
}
TY - JOUR
T1 - Regeneration of high pressure turbine blades. Development of a hybrid brazing and aluminizing process by means of thermal spraying
AU - Nicolaus, M.
AU - Möhwald, K.
AU - Maier, H. J.
PY - 2017/3/2
Y1 - 2017/3/2
N2 - Besides welding, high temperature vacuum repair-brazing is already established for nickel-based alloy turbine blades in the aerospace and power plant industries. After the worn turbine blade has been decoated to its substrate material, the filler metal is deposited as a paste, (melt-spin) foil or tape which also consists of a nickel-based alloy. Following this, the hot-gas corrosion protective coating (e.g. NiCoCrAlY) is applied using thermal spraying. The brazed turbine blade is ground or milled to size and subsequently aluminized to further increase its corrosion resistance. Using the current state of technology, a turbine blade can undergo approximately 3 to 4 repair cycles. In the present study, the development of a two-stage hybrid technology for repairing turbine blades is considered which incorporates, on the one hand, a process technology and manufacturing aspects and, on the other hand, considers material-technological mechanisms. During the first stage of this hybrid technology, the filler metal together with the hot-gas corrosion protective coating is applied using thermal spraying. The subsequent second stage combines the brazing and aluminizing processes. The technology developed here brings technical and economic advantages whilst enabling the current state-of-the-art's corresponding process chain for repairing turbine blades to be shortened.
AB - Besides welding, high temperature vacuum repair-brazing is already established for nickel-based alloy turbine blades in the aerospace and power plant industries. After the worn turbine blade has been decoated to its substrate material, the filler metal is deposited as a paste, (melt-spin) foil or tape which also consists of a nickel-based alloy. Following this, the hot-gas corrosion protective coating (e.g. NiCoCrAlY) is applied using thermal spraying. The brazed turbine blade is ground or milled to size and subsequently aluminized to further increase its corrosion resistance. Using the current state of technology, a turbine blade can undergo approximately 3 to 4 repair cycles. In the present study, the development of a two-stage hybrid technology for repairing turbine blades is considered which incorporates, on the one hand, a process technology and manufacturing aspects and, on the other hand, considers material-technological mechanisms. During the first stage of this hybrid technology, the filler metal together with the hot-gas corrosion protective coating is applied using thermal spraying. The subsequent second stage combines the brazing and aluminizing processes. The technology developed here brings technical and economic advantages whilst enabling the current state-of-the-art's corresponding process chain for repairing turbine blades to be shortened.
KW - aluminizing
KW - repair-brazing
KW - thermal spraying
UR - http://www.scopus.com/inward/record.url?scp=85017459917&partnerID=8YFLogxK
U2 - 10.1016/j.procir.2016.09.041
DO - 10.1016/j.procir.2016.09.041
M3 - Conference article
AN - SCOPUS:85017459917
VL - 59
SP - 72
EP - 76
JO - Procedia CIRP
JF - Procedia CIRP
SN - 2212-8271
T2 - 5th International Conference on Through-life Engineering Services, TESConf 2016
Y2 - 1 November 2016 through 2 November 2016
ER -