Iron-nickel alloy

Abstract

Disclosed is a creep-resistant low-expansion iron-nickel alloy that is provided with increased mechanical resistance and contains 40 to 43 wt. % of Ni, a maximum of 0.1 wt. % of C, 2.0 to 3.5 wt. % of Ti, 0.1 to 1.5 wt. % of Al, 0.1 to 1.0 wt. % of Nb, 0.005 to 0.8 wt. % of Mn, 0.005 to 0.6 wt. % of Si, a maximum of 0.5 wt. % of Co, the remainder being composed of Fe and production-related impurities. Said alloy has a mean coefficient of thermal expansion < 5 X 10<-6> / K in the temperature range of 20 to 200 DEG C.

Description

technical field [0001] The invention relates to a creep-resistant and low expansion iron-nickel alloy with high mechanical strength. Background technique [0002] To an increasing extent, carbon fiber-reinforced plastics (CFK) are also used for the production of components for safety-relevant products, such as in aircraft construction. To produce such components, large frame base bodies are required as mold parts, in which iron-nickel alloys with about 36% nickel (Ni36) with low expansion rates have been processed until now. [0003] Alloys used to date although have less than 2.0×10 -6 / K coefficient of thermal expansion, but its mechanical properties are considered too poor. [0004] Through US-A 5,688,471, it is known that one has a maximum of 4.9×10 -6 A high-strength alloy with an expansion coefficient of m / m / °C, the alloy is composed of the following substances (mass%): 40.5-48% Ni, 2-3.7% Nb, 0.75-2% Ti, and a maximum total content of 3.7 % Nb+Ta, 0-1% Al, 0-0.1% ...

AI Technical Summary

Problems solved by technology

[0003] Alloys used to date although have less than 2.0×10 -6 / K coefficient of thermal expansion, but its mechanical properties are considered too poor

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