NICKEL AND CHROME BASED IRON ALLOY HAVING ENHANCED HIGH TEMPERATURE OXIDATION RESISTANCE
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United States of America
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Jan 23, 2020
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Feb 27, 2018
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Feb 27, 2018
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Abstract
A nickel- and chrome-rich highly heat-resistant, austenitic iron based alloy. The alloy exhibits an improved fine dendritic carbide structure and can withstand repeated thermal elongation and strain which is particularly important for an exhaust-gas turbocharger component exposed to exhaust gas flow, such as a turbine housing. The alloy also guarantees very good thermo-mechanical fatigue (TMF) loading performance. A thermal cracking problem of the component is significantly reduced. The alloy is influenced by the relationship between the elements nickel, niobium, cerium and vanadium. The invention further concerns a method for prevention of crack formation and for minimizing oxidization in a turbocharger turbine housing.
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