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Iron base high-temperature alloy surface refiner

A technology of iron-based superalloy and refiner, which can be used in metal processing equipment, coating, casting and molding equipment, etc., and can solve problems such as high price

Inactive Publication Date: 2009-04-29
大连核心铸造技术工程研究所
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, because cobalt oxide is a better surface refiner, but its price is more expensive

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0008] Embodiment 1: An iron-based superalloy surface refiner, wherein the weight content of cobalt aluminate is 85%; the weight content of titanium alloy is 15%, and the above prepared refiner is mixed with silica sol to make silica sol refinement Slurry, the viscosity of the slurry is controlled within 30. The silica sol refinement slurry is coated on the investment casting surface, and the crystal grains on the surface of the casting are made fine by virtue of the interaction between the molten metal and the refiner in the surface coating.

Embodiment 2

[0009] Embodiment 2: An iron-based superalloy surface refiner, wherein the weight content of cobalt aluminate is 65%; the weight content of titanium alloy is 35%, and the above prepared refiner is mixed with silica sol to make silica sol refinement Slurry, the viscosity of the slurry is controlled within 35. The silica sol refinement slurry is coated on the investment casting surface, and the crystal grains on the surface of the casting are made fine by virtue of the interaction between the molten metal and the refiner in the surface coating.

Embodiment 3

[0010] Embodiment 3: an iron-based superalloy surface refiner, wherein the weight content of cobalt aluminate is 75%; Mix the prepared refiner with silica sol to make silica sol refinement slurry, and the viscosity of the slurry is controlled within 35°C. The silica sol refinement slurry is coated on the investment casting surface, and the crystal grain refinement effect on the casting surface is better.

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PUM

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Abstract

The invention relates to a surface refiner of iron-base superalloy, which consists of cobalt aluminate and titanium alloy; wherein, the weight content of the cobalt aluminate is 65 to 85 percent, and the weight content of the titanium alloy is 15 to 35 percent. The refiner also comprises chromic oxide accounting for 3 to 5 percent of the total weight. When in use, the prepared refiner can be mixed with silica sol to prepare silica sol refinement slurry with the viscosity controlled to be 30s to 35s. The silica sol refinement slurry is coated on the surface of investment casting and leads the grains on the surface of the casting to be fine by the interaction of the refiner between molten metal and an investment precoat.

Description

technical field [0001] The invention relates to a surface refiner for an iron-based superalloy, and belongs to the technical field of metal grain treatment on the surface of an iron-based superalloy. Background technique [0002] Grain refinement is required on the surface of the casting. Usually, a certain amount of grain refiner is added to the investment casting surface coating, and the surface grain of the casting is made fine by the interaction between the metal liquid and the refiner in the surface coating. It has a strong ability to reduce and eliminate white spots, can significantly refine grains, increase the number of eutectic clusters, reduce the sensitivity of the casting section, make the thickness and thickness of the casting section and hardness uniform, promote the formation of A-type graphite, stabilize the pearlite content, and then increase The performance of cold and heat fatigue resistance and mechanical fatigue resistance of dynamic castings. In the pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C3/00
Inventor 梁红
Owner 大连核心铸造技术工程研究所