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US 11,306,376 B2Granted
Wastegate component comprising a novel alloy
AssigneeBorgWarner Inc.
InventorsGerald Schall, Melanie Gabel, Stephan Weniger
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Abstract
The present invention relates to a waste gate component for a turbo charger comprising an alloy comprising about 30 to about 42 wt.-% Ni, about 15 to about 28 wt.-% Cr, about 1 to about 5 wt.-% Cr, about 1 to about 4 wt.-% Ti, and at least about 20 wt.-% Fe, and to processes for preparing such a waste gate component.
Claims11
A waste gate component for a turbo charger comprising an alloy of the following composition:
- a)
- Ni
- 30 to 42 wt.-%,
- b)
- Cr
- 15 to 28 wt.-%,
- c)
- Co
- 1 to 5 wt.-%,
- d)
- Ti
- 1 to 4 wt.-%,
- Fe as balance, but at least in an amount of 20 wt.-%;
- and
- wherein the alloy extends to a surface of the component and has an austenitic microstructure and comprises second phase particles or aggregates of said second phase particles, wherein said particles have an average grain size of less than 5 μm, wherein at least part of the surface of the component is preparable by shot peening the surface with a substantially spherical shot material having a diameter of between 100 and 200 μm.
12 more elements
Dependencies are inferred from the claim text.