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Ni-base superalloy and manufacturing method thereof

a manufacturing method and superalloy technology, applied in the field of ni-base superalloy and a manufacturing method thereof, can solve the problems of difficult to reduce the price of alloys containing re or ru, difficult to reduce the price of alloys manufactured by a typical casting process, and high-temperature creep and oxidation resistance of alloys, etc., to achieve excellent high-temperature creep and oxidation resistance, improve directional solidification castability, and reduce manufacturing cost

Inactive Publication Date: 2016-06-23
KOREA INST OF MASCH & MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention is a Ni-base superalloy with excellent high-temperature creep and oxidation resistance that is manufactured at a reduced cost compared to conventional technologies. The invention also includes improved directional solidification castability by optimizing the composition ratio of alloying elements. The technical effect of this invention is to provide an improved Ni-base superalloy with enhanced high-temperature performance at a reduced cost, making it suitable for various industrial applications.

Problems solved by technology

Therefore, a turbine blade or vane, which operates at high-temperature, has a three-dimensionally complicated aerodynamic design including a complicatedly shaped cooling passage within the component to obtain higher efficiency under given conditions.
An alloy manufactured by a typical casting process has a grain boundary vulnerable to high-temperature creep.
% Re and Ru accounts for about half of the total alloy cost, and thus it is difficult to reduce the price of the alloy containing Re or Ru.

Method used

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  • Ni-base superalloy and manufacturing method thereof
  • Ni-base superalloy and manufacturing method thereof
  • Ni-base superalloy and manufacturing method thereof

Examples

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Embodiment Construction

[0047]Hereinafter, referring to FIG. 1 and FIG. 2, a composition and an internal structure of the Ni-base superalloy according to the present invention will be explained.

[0048]Terms or words used in this specification and claims are not limited to a general definition or a dictionary definition, and should be interpreted as a meaning or a concept conforming to the technical idea of the present invention based on a principle in which an inventor can properly define the terms or the words in order to describe his / her invention in the best way.

[0049]Therefore, Example described in the present specification and the configurations illustrated in the drawings are just one exemplary embodiment of the present invention and do not represent all the technical concepts of the present invention, and thus, it should be understood that various equivalents and modifications may be present which can replace them at the time of application of the present invention.

[0050]FIG. 1 is a table showing the...

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Abstract

According to the present invention, a Ni-base superalloy is comprised 2.0 to 6.0 wt. % of cobalt (Co), 8.0 to 12.0 wt. % of chromium (Cr), 5.0 to 9.0 wt. % of tungsten (W), 3.5 to 6.0 wt. % of aluminum (Al), 3.0 wt. % or less of titanium (Ti), 5.0 to 10.0 wt. % of tantalum (Ta), 0.05 to 0.15 wt. % of carbon (C), 0.02 wt. % or less of boron (B), 0.05 wt. % or less of zirconium (Zr), with the remainder being composed of nickel (Ni) and unavoidable impurities.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application claims priority to Korean Patent Application No. 10-2014-0139830, filed on Oct. 16, 2014 and entitled “NI-BASE SUPERALLOY AND MANUFACTURING METHOD THEREOF”. The disclosures of the foregoing applications are incorporated herein by reference in their entirety.BACKGROUND OF THE INVENTION[0002]1. Field of the Invention[0003]The present invention relates to a Ni-base superalloy and a manufacturing method thereof, and more particularly, to a Ni-base superalloy having a high-temperature creep properties and remarkably reduced in manufacturing cost by not adding rare elements such as Re, Ru, and Mo and a manufacturing method thereof.[0004]Further, the present invention relates to a Ni-base superalloy and a manufacturing method of the Ni-base superalloy which can maximize the solid-solution hardening effect and improve the directional solidification castability, oxidation resistance, and creep properties while maintaining a phase ...

Claims

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Application Information

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IPC IPC(8): C22C19/05B22D21/00C21D1/74C21D1/18C22F1/10C21D1/773
CPCC22C19/056C22F1/10B22D21/005C21D1/74C21D1/18C21D1/773B22D27/045
Inventor SEO, SEONG MOONYOO, YOUNG SOOYUN, DAE WONJEONG, HI WON
Owner KOREA INST OF MASCH & MATERIALS
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