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Corrosion-resistant casting cobalt alloy for solar thermal power generation molten salt system and process thereof

A technology of solar thermal power generation and molten salt system, which is applied in the field of alloys, can solve the problems of not being able to effectively fill the gaps between dendrites, and achieve the effect of eliminating casting holes

Inactive Publication Date: 2018-12-18
GUANGZHOU YUZHI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, during the solidification process of the alloy, the dendrite backbone and side branches are formed by the precipitation of the first phase, so that the subsequent melt cannot effectively fill the gaps between the dendrites, and it will also promote the formation of pores and porosity.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A corrosion-resistant cast cobalt alloy for a solar thermal power generation molten salt system and a process thereof. In terms of weight percentage, the composition of the alloy is Sn: 2.0wt.%, In: 1.5wt.%, Ag: 0.4wt.%, Cr: 3.0wt.%, Al: 4.0wt.%, Mn: 0.4wt.% , Ge: 1.0wt.%, Cu: 2.0wt.%, and the balance is cobalt. The above-mentioned corrosion-resistant casting cobalt alloy for a solar thermal power generation molten salt system and its process include the following steps: adding the raw materials in the above ratio into an induction furnace under an argon environment, and using a graphite crucible; melting at 1600 degrees Keep warm for 10 minutes, stir evenly with high-frequency induction furnace electromagnetically; after stirring evenly, keep warm at 1600 degrees for 1 minute and cast out of the furnace; alloy casting uses a steel mold with a diameter of 50-100mm, and uses water cooling to cool down. The obtained ingot is heated to 1650-1700 degrees at room temperatur...

Embodiment 2

[0021] A corrosion-resistant cast cobalt alloy for a solar thermal power generation molten salt system and a process thereof. In terms of weight percentage, the composition of the alloy is Sn: 3.0wt.%, In: 1.8wt.%, Ag: 0.6wt.%, Cr: 3.5wt.%, Al: 5.0wt.%, Mn: 0.6wt.% , Ge: 1.4wt.%, Cu: 3.0wt.%, and the balance is cobalt. The above-mentioned corrosion-resistant casting cobalt alloy for a solar thermal power generation molten salt system and its process include the following steps: adding the raw materials in the above ratio into an induction furnace under an argon environment, and using a graphite crucible; melting at 1600 degrees Keep warm for 10 minutes, stir evenly with high-frequency induction furnace electromagnetically; after stirring evenly, keep warm at 1600 degrees for 1 minute and cast out of the furnace; alloy casting uses a steel mold with a diameter of 50-100mm, and uses water cooling to cool down. The obtained ingot is heated to 1650-1700 degrees at room temperatur...

Embodiment 3

[0024] A corrosion-resistant cast cobalt alloy for a solar thermal power generation molten salt system and a process thereof. In terms of weight percentage, the composition of the alloy is Sn: 2.5wt.%, In: 1.6wt.%, Ag: 0.5wt.%, Cr: 3.2wt.%, Al: 4.5wt.%, Mn: 0.5wt.% , Ge: 1.2wt.%, Cu: 2.8wt.%, and the balance is cobalt. The above-mentioned corrosion-resistant casting cobalt alloy for a solar thermal power generation molten salt system and its process include the following steps: adding the raw materials in the above ratio into an induction furnace under an argon environment, and using a graphite crucible; melting at 1600 degrees Keep warm for 10 minutes, stir evenly with high-frequency induction furnace electromagnetically; after stirring evenly, keep warm at 1600 degrees for 1 minute and cast out of the furnace; alloy casting uses a steel mold with a diameter of 50-100mm, and uses water cooling to cool down. The obtained ingot is heated to 1650-1700 degrees at room temperatur...

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PUM

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Abstract

The invention discloses a corrosion-resistant casting cobalt alloy for solar thermal power generation molten salt system and a process thereof. The alloy consists of the following components in percentage by weight: 2.0-3.0wt% of Sn, 1.5-1.8wt% of In, 0.4-0.6wt% of Ag, 3.0-3.5wt% of Cr, 4.0-5.0wt% of Al, 0.4-0.6wt% of Mn, 1.0-1.4wt% of Ge, 2.0-3.0wt% of Cu and the balance of cobalt. The material provides a novel materials science scheme for a corrosion-resistant cobalt alloy used under a marine environment, and also provides the cobalt alloy with excellent casting property. The alloy is implemented and industrialized, so that commercial upgrading needs, on the high-end cobalt alloy material, of heat dissipation tubes and heat storage tubes in the solar thermal power generation field in China are greatly promoted.

Description

technical field [0001] The invention relates to the technical field of alloys, in particular to a cobalt alloy. Background technique [0002] Superalloys, also known as heat-strength alloys, heat-resistant alloys or superalloys, are based on Fe, Co and Ni, and are austenitic alloy materials that can withstand relatively large and complex stresses while maintaining surface stability when used above 600 degrees. Due to its good heat resistance, high strength, excellent ductility, hot workability, weldability, fatigue resistance and corrosion resistance, superalloys are widely used in fields such as petrochemical, thermoelectric, nuclear power, and transportation. fields, aerospace and defense, etc. Especially in today's top aero-engine field, the usage of superalloys is about 50% of the total. [0003] Superalloys originated in the 1930s, because the aerospace conditions required the use of high-temperature resistant materials to prepare turbochargers, so superalloys appeare...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C19/07C22C1/02
CPCC22C1/02C22C19/07
Inventor 杨长江
Owner GUANGZHOU YUZHI TECH CO LTD
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