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Corrosion-resistant alloy die-casting casting slag

A technology of corrosion-resistant alloy and mold slag, which is applied in the field of iron and steel, can solve problems such as cold insulation and carburization, and achieve the effects of eliminating cold insulation, weakening oxidation, and improving surface quality

Pending Publication Date: 2022-01-07
CHENGDU ADVANCED METAL MATERIALS IND TECH RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide corrosion-resistant alloy mold casting mold flux, to solve the cold shut, scab, longitudinal crack, slag groove, slag pit and carburization, etc. Problems, reduce the grinding process of electrode ingots and metal grinding losses, improve production efficiency and product yield, and reduce production costs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Embodiment 1 Using the corrosion-resistant alloy mold casting mold flux of the present invention to cast

[0034] The chemical composition of the corrosion-resistant alloy mold casting mold flux in this embodiment 1 includes, by weight percentage: CaO: 34%, Al 2 o 3 : 35%, MgO: 8%, Na 2 O: 6%, CaF 2 : 6%, Na 3 AlF 6 : 11%. Alkalinity: [(CaO+MgO) / (Al 2 o 3 )] = 1.20. Melting point: 1280°C, viscosity at 1350°C is 0.16Pa.s, particle size distribution is between 100 and 300 mesh, of which particle size greater than 200 mesh accounts for more than 70% of the total weight, which is convenient for rapid formation of slag coating, lubricating the wall of the steel ingot, Smooth the surface of the ingot.

[0035] The mold flux is used to pour 7.85t UNS N08825 alloy die-cast electrode ingot on site. The chemical composition of UNS N08825 alloy is: C: ≤0.05%, Si: ≤0.5%, Mn: ≤1.0%, Ni: 38.0%~46.0%, Cr: 19.5%-23.5%, Fe: ≥22%, Cu: 1.5%-3.0%, S: ≤0.03%, Al: ≤0.2%, Ti: 0.6%-1...

Embodiment 2

[0036] Embodiment 2 Using the corrosion-resistant alloy mold casting mold flux of the present invention to cast

[0037] The chemical composition of the corrosion-resistant alloy mold casting mold flux in this embodiment 2 includes, by weight percentage: CaO: 35%, Al 2 o 3 : 36%, MgO: 6%, Na 2 O: 6%, CaF 2 : 5%, Na 3 AlF 6 : 12%. Alkalinity: [(CaO+MgO) / (Al 2 o 3 )]=1.14, melting point: 1270 DEG C, viscosity at 1350 DEG C is 0.15 Pa.s, particle size distribution is between 100 and 300 mesh, wherein the particle size is greater than 200 mesh and accounts for more than 70% of the total weight, which is convenient for rapid formation of slag coating, Lubricate the mold wall of the ingot to make the surface of the ingot smooth.

[0038] The mold flux is applied to casting 7.85t UNS N08821 alloy mold casting electrode ingot on site. The chemical composition of UNS N08821 alloy is: C: ≤0.025%, Si: ≤0.5%, Mn: ≤1.5%, Ni: 39.0%~46.0%, Cr: 20.0% to 22.0%, Cu: 1.5% to 3.0%, S: ≤0...

Embodiment 3

[0039] Embodiment 3 Using the corrosion-resistant alloy mold casting mold flux of the present invention to cast

[0040] The chemical composition of the mold flux for corrosion-resistant alloy mold casting in this embodiment 3 includes, by weight percentage: CaO: 35%, Al 2 o 3 : 37%, MgO: 7%, Na 2 O: 4%, CaF 2 : 5%, Na 3 AlF 6 : 12%. Alkalinity: [(CaO+MgO) / (Al 2 o 3 )] = 1.13, melting point: 1290°C, viscosity at 1350°C is 0.17Pa.s, particle size distribution is between 100 and 300 mesh, wherein particle size greater than 200 mesh accounts for more than 70% of the total weight, which is convenient for rapid formation of slag coating, Lubricate the mold wall of the ingot to make the surface of the ingot smooth.

[0041] The mold flux is used to cast 3.22t UNS N08821 alloy die-cast electrode ingot on site. The chemical composition of UNS N08821 alloy is: C: ≤0.025%, Si: ≤0.5%, Mn: ≤1.5%, Ni: 39.0%~46.0%, Cr: 20.0% to 22.0%, Cu: 1.5% to 3.0%, S: ≤0.03%, Al: ≤0.2%, Ti: 0.6...

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Abstract

The invention belongs to the field of steel, and particularly relates to corrosion-resistant alloy die-casting casting slag. The problems of cold shut, scabbing, recarburization and the like on the surface of a corrosion-resistant alloy die casting ingot in the prior art are solved. The corrosion-resistant alloy die-casting casting slag comprises the following chemical components in percentage by weight: 33 to 39 percent of CaO, 33 to 39 percent of Al2O3, 5 to 11 percent of MgO, 3 to 7 percent of Na2O, 3 to 7 percent of CaF2, 10 to 15 percent of Na3AlF6 and the balance of inevitable impurities. The casting slag is applied to Ni-based high-temperature corrosion-resistant alloy electrode ingot die casting, the slag structure is stable in the casting process, the inclusion adsorption capacity is high, a steel slag interface is easy to separate, slag entrapment is not prone to happening, and the recarburization condition of the surface of an alloy electrode ingot is not found.

Description

technical field [0001] The invention belongs to the field of iron and steel, and in particular relates to mold casting mold flux of corrosion-resistant alloys. Background technique [0002] Corrosion-resistant alloys are superalloys resistant to corrosion by special media, mainly including iron-based alloys, nickel-based alloys and active metals. Here specifically refers to nickel-based corrosion-resistant alloys, including Ni-Cr alloys, Ni-Cr-Mo alloys, Ni-Cu alloys, etc., because of their high strength and good resistance to high temperature oxidation, hydroxide and various The ability of acid corrosion, especially the excellent performance in high temperature environment, is widely used in the manufacture of various corrosion-resistant parts for petroleum, chemical, electric power and other environments. With the development of industrial technology, the complexity of environmental media, and the intensification of international competition, many industries have higher a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D27/18B22D7/00
CPCB22D27/18B22D7/005
Inventor 杜思敏李雄林发驹吴铖川
Owner CHENGDU ADVANCED METAL MATERIALS IND TECH RES INST CO LTD
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