Investment Casting Defects of a Turbine Nozzle Made by K465 Alloy

Yang Li; Pei Jia Li; Xing Fu Chen; Hao Ran Liu; Jian Tao Wu; Jun Tao Li

doi:10.4028/www.scientific.net/MSF.898.487

Paper Titles

Effect of Cold Working and Aging Treatment on the Mechanical Properties of Co-Ni Alloy
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Oxidation Behavior of a Disk Powder Metallurgy Superalloy
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Effects of HIP Process on the Microstructure and Mechanical Properties of a Cast Superalloy
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Influence of Heat Treatment Temperature on the Microstructures and High Cycle Fatigue Properties of DD6 Single Crystal Superalloy
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Investment Casting Defects of a Turbine Nozzle Made by K465 Alloy
p.487

Influences of W and Al on the Microstructure and Stress-Rupture Property of Re-Free Ni-Based Single Crystal Superalloys
p.492

Effect of Low-Angle Boundary on Microstructure and Stress Rupture Property of a Third Generation Single Crystal Superalloy DD10
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Characteristics of Microscopic Inclusions and their Influence on Fatigue Crack Propagation in FGH96 Superalloy
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Microstructure Evolution and Stress Rupture Properties of DD6 Single Crystal Superalloy after Overheating
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HomeMaterials Science ForumMaterials Science Forum Vol. 898Investment Casting Defects of a Turbine Nozzle...

Investment Casting Defects of a Turbine Nozzle Made by K465 Alloy

Abstract:

The investment casting defects in a turbine nozzle with size of φ 331mm and thickness 0.7 mm and the number of vanes of 31 have been studied in two aspects, which were the porosity of the turbine nozzle’s inner cone and the cracks of the turbine nozzle’s vanes. ProCAST software was used to analyze the nozzle’s solidification process. A suitable gating system was used to solve porosity issues effectively by changing local thickness and improving solidification conditions. The crack on the nozzle’s vanes was studied and a kind of grain refiner was used to solve crack issues by improving shell strength. In order to manufacture castings with high metallurgical quality and meet the design and use demands, a reasonable gating system and a moderate shell process were used.

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Periodical:

Materials Science Forum (Volume 898)

Pages:

487-491

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.898.487

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Online since:

June 2017

Authors:

Yang Li*, Pei Jia Li, Xing Fu Chen, Hao Ran Liu, Jian Tao Wu, Jun Tao Li

Keywords:

K465 Alloy, Precision-Investment, Turbine Nozzle

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