Abstract
Alloys with high amount of chromium are used for
protection of power plant boilers against the high
temperature corrosion, especially heat exchanger
surfaces, such as superheaters. Thermal spray coatings
can be applied to low alloyed steel in order to enhance
the lifetime of the cheap substrate material. In this
study NiCr (50Ni49Cr1Fe) powder was sprayed with DJ
Hybrid and CJS HVOF techniques, and the spraying process
was optimized with process map methodology, including
SprayWatch for measuring the temperature and velocity of
the spray stream, and ICP (In-situ coating property
measurement) for measuring the stress state. Different
spraying parameters were applied in order to attain the
best suitable coating characteristics for high
temperature applications, such as high density and low
oxidation stage. The coatings were analyzed e.g. by
microscopic means and mechanical testing. The use of
process optimization, process-structure-properties
methodology, and following coating characteristics are
presented
| Original language | English |
|---|---|
| Title of host publication | International Thermal Spray Conference & Exposition (ITSC 2012) |
| Subtitle of host publication | Air, Land, Water and the Human Body: Thermal Spray Science and Applications |
| Publisher | ASM International |
| Pages | 81-86 |
| ISBN (Print) | 978-1-63266-679-6 |
| Publication status | Published - 2012 |
| MoE publication type | A4 Article in a conference publication |
| Event | International Thermal Spray Conference, ITSC 2012 - Houston, United States Duration: 21 May 2012 → 24 May 2012 |
Conference
| Conference | International Thermal Spray Conference, ITSC 2012 |
|---|---|
| Abbreviated title | ITSC |
| Country | United States |
| City | Houston |
| Period | 21/05/12 → 24/05/12 |
Keywords
- ProperTune
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Cite this
Oksa, M., Varis, T., Suhonen, T., & Jokipii, M. (2012). Optimizing NiCr thermal spray coating with process map methodology for high temperature power plant boiler application. In International Thermal Spray Conference & Exposition (ITSC 2012): Air, Land, Water and the Human Body: Thermal Spray Science and Applications (pp. 81-86). ASM International.