A corrosion-resistant alloy material and casting process thereof

Abstract

The invention discloses a corrosion-resistant alloy material and a casting process thereof, comprising the following components in weight percentage: 8-12% manganese, 1-3% tungsten, 12-16% nickel, 1-3% silicon, 12-16% chromium, 1-3% magnesium, 1-3% titanium, 1-3% europium, 1-3% thorium, 1-3% copper, 8-12% molybdenum, and 23-53% iron; comprising the following steps: weighing raw materials of manganese, tungsten, nickel, silicon, chromium, magnesium, titanium, europium, thorium, copper, molybdenum, and iron; preheating a mold; mixing the manganese, iron, nickel, tungsten, and chromium in the weighed raw materials; and casting the raw materials. Add the molybdenum element to the melting furnace for smelting, and control the smelting temperature at 1500-1600°C; after the charge is completely melted, add silicon and magnesium, and continue smelting until the temperature reaches 1650-1750°C; the beneficial effects of the present invention are: by adding molybdenum element, the electrode potential of the alloy is significantly improved, and its corrosion resistance is enhanced; the addition of europium and thorium further improves the corrosion resistance of the alloy, so that it can be used for a long time in a more severe corrosive environment; the addition of elements such as manganese and chromium improves the metallographic structure of the material, enhances the wear resistance, and prolongs the service life.

Description

Technical Field

[0001] The invention belongs to the technical field of alloy materials, and in particular relates to a corrosion-resistant alloy material and a casting process thereof. Background Art

[0002] An alloy is a substance that is composed of two or more metals or metals and non-metals through smelting, sintering or other methods and has metallic properties; many corrosion-resistant alloys can form a dense passivation film in a corrosive environment. This film can effectively prevent the corrosive medium from directly contacting the alloy matrix, thereby significantly improving the corrosion resistance of the alloy.

[0003] Patent publication number CN105506491B discloses an alloy material resistant to corrosion by molten aluminum-zinc liquid and its casting process. The patent discloses a material containing the following components by weight: C0.40%-0.60%, Cr 9%-11%, Si 2%-2.5%, Mo0.7%-1.0%, W 0.7%-3%, Ti0.05%-0.2%, rare earth 0.05%-0.2%, and the remainder is iron and unavoidable impurities; the casting process of the alloy material resistant to corrosion by molten aluminum-zinc liquid comprises the following steps: weighing raw materials according to the formula; annealing the mold to 360°C; adding ferrochrome, carbon rods, and pure tungsten into a furnace for smelting at a smelting temperature of ≤760°C; adding iron after the charge is melted at a smelting temperature of 1550°C-1580°C, and stopping the furnace to make slag after the iron is melted; adding ferrosilicon , ferromolybdenum, and rare earth. After the temperature reaches 1620℃, slag is made and steel is tapped again. Ferrotitanium is added into the ladle. When the temperature reaches 1500℃, the molten steel is poured into the mold for casting. The mold barrel speed during casting is 1100r / min, and the mold is demolded after 30min. After demolding, the casting is placed in an oven and heated to 600-620℃. After keeping warm for 2 hours, it is air-cooled. This patent has the problems of insufficient corrosion resistance and unstable metallographic structure. In addition, the composition is complex and the process requirements are high, which limits its wide application. Summary of the invention

[0004] The purpose of the present invention is to provide a corrosion-resistant alloy material and a casting process thereof, which significantly improves the corrosion resistance of the alloy material by optimizing the alloy composition, and at the same time improves the metallographic structure of the material and enhances the wear resistance.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solution: a corrosion-resistant alloy material, comprising the following components in weight percentage: manganese 8-12%, tungsten 1-3%, nickel 12-16%, silicon 1-3%, chromium 12-16%, magnesium 1-3%, titanium 1-3%, europium 1-3%, thorium 1-3%, copper 1-3%, molybdenum 8-12%, and iron 23-53%.

[0006] As a preferred technical solution of the present invention, it includes the following components in weight percentage: 8% manganese, 1% tungsten, 12% nickel, 1% silicon, 12% chromium, 1% magnesium, 1% titanium, 1% europium, 1% thorium, 1% copper, 8% molybdenum, and 53% iron.

[0007] As a preferred technical solution of the present invention, it includes the following components in weight percentage: 10% manganese, 2% tungsten, 14% nickel, 2% silicon, 14% chromium, 2% magnesium, 2% titanium, 2% europium, 2% thorium, 2% copper, 10% molybdenum, and 38% iron.

[0008] As a preferred technical solution of the present invention, it includes the following components in weight percentage: 12% manganese, 3% tungsten, 16% nickel, 3% silicon, 16% chromium, 3% magnesium, 3% titanium, 3% europium, 3% thorium, 3% copper, 12% molybdenum, and 23% iron.

[0009] The present invention also discloses a casting process of a corrosion-resistant alloy material, comprising the following steps:

[0010] Weigh the raw materials manganese, tungsten, nickel, silicon, chromium, magnesium, titanium, europium, thorium, copper, molybdenum, and iron;

[0011] Preheat the mold;

[0012] Add the weighed raw materials of manganese, iron, nickel, tungsten and chromium into a furnace for smelting, and control the smelting temperature at 1500-1600°C;

[0013] After the charge is completely melted, add silicon and magnesium and continue smelting until the temperature reaches 1650-1750℃;

[0014] Stop the furnace to make slag and remove impurities;

[0015] Add molybdenum, copper, titanium, europium and thorium raw materials, heat up to 1800-1900℃ again and then slag and tap steel;

[0016] Pour the molten steel into the preheated mold for casting;

[0017] After casting is completed, keep the temperature in the mold constant for 30-40 minutes before demolding;

[0018] The casting is placed in an oven to heat up, kept warm, and then air-cooled.

[0019] As a preferred technical solution of the present invention, the mold is preheated to 350-400°C.

[0020] As a preferred technical solution of the present invention, molten steel is poured into a preheated mold for casting, and the rotation speed of the mold barrel of the mold is controlled at 800-1200r / min during casting.

[0021] As a preferred technical solution of the present invention, the casting is placed in an oven and heated to 580-640° C., kept warm for 1.5-2.5 hours, and then air-cooled.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] By adding molybdenum, the electrode potential of the alloy is significantly increased, and its corrosion resistance is enhanced;

[0024] The addition of europium and thorium further improves the corrosion resistance of the alloy, allowing it to be used for a long time in a more severe corrosive environment;

[0025] The addition of elements such as manganese and chromium improves the metallographic structure of the material, enhances wear resistance and prolongs service life;

[0026] The casting process improves production efficiency and ensures casting quality by optimizing melting and casting parameters;

[0027] Optimization of mold preheating and casting parameters reduces defects in castings and improves the density and strength of castings. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 The present invention is a flow chart of the corrosion-resistant alloy material casting process. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] Example 1

[0031] See also Figure 1 , which is the first embodiment of the present invention, provides a corrosion-resistant alloy material, including the following components in weight percentage: 8% manganese, 1% tungsten, 12% nickel, 1% silicon, 12% chromium, 1% magnesium, 1% titanium, 1% europium, 1% thorium, 1% copper, 8% molybdenum, and 53% iron.

[0032] A casting process for a corrosion-resistant alloy material comprises the following steps:

[0033] Weigh the raw materials manganese, tungsten, nickel, silicon, chromium, magnesium, titanium, europium, thorium, copper, molybdenum, and iron;

[0034] Preheat the mold to 350°C;

[0035] Add the weighed raw materials of manganese, iron, nickel, tungsten and chromium into the furnace for smelting, and control the smelting temperature at 1500°C;

[0036] After the charge is completely melted, add silicon and magnesium and continue smelting until the temperature reaches 1650°C;

[0037] Stop the furnace to make slag and remove impurities;

[0038] Add molybdenum, copper, titanium, europium and thorium raw materials, heat up to 1800℃ again and then slag and steel are produced;

[0039] Pour the molten steel into the preheated mold for casting. During casting, the mold barrel speed is controlled at 800r / min;

[0040] After casting is completed, keep the temperature in the mold constant for 30 minutes before demolding;

[0041] The casting was placed in an oven and heated to 580°C, kept at this temperature for 1.5 hours and then air-cooled.

[0042] Example 2

[0043] See also Figure 1 , which is the second embodiment of the present invention, provides a corrosion-resistant alloy material, including the following components in weight percentage: 10% manganese, 2% tungsten, 14% nickel, 2% silicon, 14% chromium, 2% magnesium, 2% titanium, 2% europium, 2% thorium, 2% copper, 10% molybdenum, and 38% iron.

[0044] A casting process for a corrosion-resistant alloy material comprises the following steps:

[0045] Weigh the raw materials manganese, tungsten, nickel, silicon, chromium, magnesium, titanium, europium, thorium, copper, molybdenum, and iron;

[0046] Preheat the mold to 375°C;

[0047] Add the weighed raw materials of manganese, iron, nickel, tungsten and chromium into the furnace for smelting, and control the smelting temperature at 1550°C;

[0048] After the charge is completely melted, add silicon and magnesium and continue smelting until the temperature reaches 1700°C;

[0049] Stop the furnace to make slag and remove impurities;

[0050] Add molybdenum, copper, titanium, europium and thorium raw materials, heat up to 1850℃ again and then slag and tap steel;

[0051] Pour the molten steel into the preheated mold for casting. During casting, the mold barrel speed is controlled at 1000r / min;

[0052] After casting is completed, keep the temperature in the mold constant for 35 minutes before demolding;

[0053] The casting was placed in an oven and heated to 610°C, kept at this temperature for 2.0 hours and then air-cooled.

[0054] Example 3

[0055] See also Figure 1 , which is the third embodiment of the present invention, provides a corrosion-resistant alloy material, including the following components in weight percentage: 12% manganese, 3% tungsten, 16% nickel, 3% silicon, 16% chromium, 3% magnesium, 3% titanium, 3% europium, 3% thorium, 3% copper, 12% molybdenum, and 23% iron.

[0056] A casting process for a corrosion-resistant alloy material comprises the following steps:

[0057] Weigh the raw materials manganese, tungsten, nickel, silicon, chromium, magnesium, titanium, europium, thorium, copper, molybdenum, and iron;

[0058] Preheat the mold to 400°C;

[0059] Add the weighed raw materials of manganese, iron, nickel, tungsten and chromium into the furnace for smelting, and control the smelting temperature at 1600°C;

[0060] After the charge is completely melted, add silicon and magnesium and continue smelting until the temperature reaches 1750°C;

[0061] Stop the furnace to make slag and remove impurities;

[0062] Add molybdenum, copper, titanium, europium and thorium raw materials, heat up to 1900℃ again and then slag and steel are produced;

[0063] Pour the molten steel into the preheated mold for casting. During casting, the mold barrel speed is controlled at 1200r / min;

[0064] After casting is completed, keep the temperature in the mold constant for 40 minutes before demolding;

[0065] The casting was placed in an oven and heated to 640°C, kept at this temperature for 2.5 hours and then air-cooled.

[0066]

[0067]

[0068] Alloy composition: The present invention significantly optimizes the composition of the alloy by adding elements such as manganese, nickel, magnesium, titanium, europium, thorium and copper, thereby improving corrosion resistance and wear resistance;

[0069] Corrosion resistance and wear resistance: Compared with the background patent, the alloy of the present invention has improved corrosion resistance and wear resistance, which are due to the optimization of alloy composition and the addition of molybdenum element;

[0070] Metallographic structure stability: The alloy of the present invention has a more uniform metallographic structure, reduces defects, and thus improves the overall performance of the material;

[0071] Casting process parameters: by optimizing the mold preheating temperature, melting temperature range, mold barrel speed during casting, oven heating temperature and holding time, etc., the casting process of the present invention improves production efficiency and ensures casting quality;

[0072] Production efficiency and casting quality: Compared with the background technology patent, the casting process of the present invention improves production efficiency, while the density and strength of the casting are significantly improved and defects are reduced.

[0073] Although the embodiments of the present invention have been shown and described, as detailed above, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A corrosion-resistant alloy material, characterized in that: The invention comprises the following components in the following weight percentages: manganese 8-12%, tungsten 1-3%, nickel 12-16%, silicon 1-3%, chromium 12-16%, magnesium 1-3%, titanium 1-3%, europium 1-3%, thorium 1-3%, copper 1-3%, molybdenum 8-12%, and iron 23-53%.

2. The corrosion-resistant alloy material according to claim 1, characterized in that: The composition includes the following components in weight percentage: 8% manganese, 1% tungsten, 12% nickel, 1% silicon, 12% chromium, 1% magnesium, 1% titanium, 1% europium, 1% thorium, 1% copper, 8% molybdenum, and 53% iron.

3. The corrosion-resistant alloy material according to claim 1, characterized in that: The composition comprises the following components in weight percentage: manganese 10%, tungsten 2%, nickel 14%, silicon 2%, chromium 14%, magnesium 2%, titanium 2%, europium 2%, thorium 2%, copper 2%, molybdenum 10%, and iron 38%.

4. The corrosion-resistant alloy material according to claim 1, characterized in that: The composition comprises the following components in weight percentage: 12% manganese, 3% tungsten, 16% nickel, 3% silicon, 16% chromium, 3% magnesium, 3% titanium, 3% europium, 3% thorium, 3% copper, 12% molybdenum and 23% iron.

5. A casting process for a corrosion-resistant alloy material according to any one of claims 1 to 4, characterized in that: The steps include: Weigh the raw materials manganese, tungsten, nickel, silicon, chromium, magnesium, titanium, europium, thorium, copper, molybdenum, and iron; Preheat the mold; Add the weighed raw materials of manganese, iron, nickel, tungsten and chromium into a furnace for smelting, and control the smelting temperature at 1500-1600°C; After the charge is completely melted, add silicon and magnesium and continue smelting until the temperature reaches 1650-1750℃; Stop the furnace to make slag and remove impurities; Add molybdenum, copper, titanium, europium and thorium raw materials, heat up to 1800-1900℃ again and then slag and tap steel; Pour the molten steel into the preheated mold for casting; After casting is completed, keep the temperature in the mold constant for 30-40 minutes before demolding; The casting is placed in an oven to heat up, kept warm, and then air-cooled.

6. The casting process of a corrosion-resistant alloy material according to claim 5, characterized in that: Preheat the mold to 350-400°C.

7. The casting process of a corrosion-resistant alloy material according to claim 5, characterized in that: Pour the molten steel into the preheated mold for casting. During casting, the mold barrel speed is controlled at 800-1200r / min.

8. The casting process of a corrosion-resistant alloy material according to claim 5, characterized in that: Place the casting in an oven and heat it to 580-640℃, keep it warm for 1.5-2.5h and then air cool it.

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