Simulation and Control of Distortion of Hydro Turbine Blade Steel Casting in Heat Treatment Process

Hai Liang Yu; Jin Wu Kang; Tian You Huang

doi:10.4028/www.scientific.net/MSF.706-709.1580

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Effect of Grain Size on the Hydrogen Diffusion Process in Steel Using Cellular Automaton Approach
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The Solute Drag Model to Calculate Grain Growth Rate at High Temperatures in Carbon Steels
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Simulation and Control of Distortion of Hydro Turbine Blade Steel Casting in Heat Treatment Process
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HomeMaterials Science ForumMaterials Science Forum Vols. 706-709Simulation and Control of Distortion of Hydro...

Simulation and Control of Distortion of Hydro Turbine Blade Steel Casting in Heat Treatment Process

Abstract:

Blades are key part of hydro turbines, which often distorts during heat treatment process for their special structures. In this paper, thermal fluid finite element simulation of the forced air cooling process of a blade casting was carried out under a variety of distances between fans and blades, air speeds, groups of fans and circumstance temperatures. The temperature fields of blade castings were obtained. A novel parameter, temperature difference between surfaces of castings along thickness direction, was proposed to analyze the distortion of blade castings. The distortion behavior of blade castings with martensitic stainless steel were discussed, which is in good agreement with distortion regularity of the experimental ones. The temperature differences between blade casting surfaces are always greater than zero, resulting in distortion which could be divided into three stages. Finally, we focused on discussing the control methods of distortion behavior of blade castings which could be operated in actual production.

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Periodical:

Materials Science Forum (Volumes 706-709)

Pages:

1580-1585

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.706-709.1580

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Online since:

January 2012

Authors:

Hai Liang Yu, Jin Wu Kang, Tian You Huang

Keywords:

Distortion, Finite Element Method (FEM), Heat Treatment, Hydro Turbine Blade Casting

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References

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