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Related Concept Videos

Steel Manufacturing01:26

Steel Manufacturing

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Steel manufacturing is a multi-stage process that begins by smelting iron ore into cast iron in a blast furnace. This initial stage involves layering iron ore with coke, a type of fuel, and crushed limestone within the furnace. The coke is ignited with a high volume of air, leading to the creation of carbon monoxide, which acts to reduce the iron ore to pure iron.
During this smelting process, limestone plays a crucial role by forming slag. Slag captures impurities within the molten iron, such...
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Related Experiment Video

Updated: Jan 18, 2026

An Available Technique for Preparation of New Cast MnCuNiFeZnAl Alloy with Superior Damping Capacity and High Service Temperature
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Optimization of Casting Process Parameters for Solidification Structures in Complex Superalloy Castings.

Shaoli Han1,2, Heli Luo1,2, Shangping Li1,2

  • 1High-Temperature Materials Research Institute, Central Iron and Steel Research Institute, Beijing 100081, China.

Materials (Basel, Switzerland)
|September 13, 2025
PubMed
Summary
This summary is machine-generated.

Optimizing nickel-based superalloy castings involves controlling solidification parameters. Simultaneous bidirectional filling and adjusted temperatures promote uniform, fine equiaxed grains in complex thin-walled components.

Keywords:
casting the grain structurecooling ratefilling flow fieldpouring temperatureshell temperature

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Area of Science:

  • Materials Science and Engineering
  • Metallurgy
  • Computational Materials Science

Background:

  • Investment casting of nickel-based superalloys often results in inhomogeneous grain structures.
  • Complex geometries and thermal gradients during solidification lead to undesirable coarse columnar grains.
  • Controlling microstructure is critical for the performance of superalloy components.

Purpose of the Study:

  • To optimize the grain structure of thin-walled nickel-based superalloy castings.
  • To investigate the influence of casting parameters on grain morphology.
  • To provide a practical approach for microstructure control in complex superalloy components.

Main Methods:

  • Utilized cellular automaton-finite element (CAFE) simulations with ProCAST software.
  • Modeled temperature fields and grain growth dynamics during solidification.
  • Validated simulation results through experimental casting.

Main Results:

  • Molten metal flow patterns significantly impact local temperature fields and grain formation.
  • Simultaneous bidirectional filling minimized thermal gradients and promoted equiaxed grains.
  • Lowering pouring and shell temperatures, alongside higher cooling rates, refined grain structure and improved uniformity.

Conclusions:

  • Optimized casting parameters, including mold filling strategy and thermal conditions, significantly improve grain homogeneity.
  • CAFE simulations coupled with experimental validation offer a powerful tool for microstructure control.
  • The findings enable enhanced control over the grain structure of intricate superalloy castings.