Production method of corrosion-resistant nickel-based alloy for chemical packing

Abstract

The application discloses a production method of corrosion-resistant nickel-based alloy for chemical filling, and comprises the following steps: S1, selecting Hastelloy C276 plate and tungsten steel alloy plate; S2, performing surface treatment on the Hastelloy C276 plate and the tungsten steel alloy plate to ensure the flatness of the surfaces of the Hastelloy C276 plate and the tungsten steel alloy plate; S3, cleaning the treated surface in step S2; S4, placing the tungsten steel alloy plate above the Hastelloy C276 plate to perform explosion welding; S5, placing the tungsten steel alloy plate on the other side of the Hastelloy C276 plate in step S4 to perform explosion welding, and obtaining a composite plate; and S6, sequentially performing first cold rolling, first annealing, second cold rolling, second annealing, third cold rolling, third annealing, fourth cold rolling and slitting on the composite plate. Compared with the prior art, the application can solve the problem that the hardness of the existing Hastelloy C276 cannot meet the requirements in the use of the chemical filling.

Description

Technical Field

[0001] This invention belongs to the field of alloy material processing technology, and in particular relates to a production method of a corrosion-resistant nickel-based alloy for chemical fillers. Background Technology

[0002] C276, as an excellent corrosion-resistant nickel-based alloy material, has been widely used in chemical and other fields. However, in the use of chemical fillers, unlike the general annealed C276, hardened C276 plates are required, and there are certain requirements for their hardness. The hardness of the current C276 plates does not meet the requirements. Summary of the Invention

[0003] The purpose of this invention is to provide a method for producing a corrosion-resistant nickel-based alloy for chemical fillers, in order to solve the problem that the hardness of existing Hastelloy 0276 alloy does not meet the requirements for use in chemical fillers.

[0004] To achieve the above objectives, the present invention provides a method for producing a corrosion-resistant nickel-based alloy for chemical fillers. The nickel-based alloy is rolled from Hastelloy C276 sheet and tungsten carbide alloy sheet, with the tungsten carbide alloy sheet covering the surface of the Hastelloy C276 sheet. The production method includes the following steps:

[0005] S1: Select the Hastelloy C276 plate and the tungsten carbide plate;

[0006] S2: Perform surface treatment on the Hastelloy C276 plate and the tungsten carbide plate to ensure the flatness of the surfaces of the Hastelloy C276 plate and the tungsten carbide plate;

[0007] S3: Clean the surface treated in step S2;

[0008] S4: Place the tungsten carbide alloy plate on top of the Hastelloy C276 plate and perform explosive welding;

[0009] S5: Place a tungsten carbide alloy plate on the other side of the Hastelloy C276 plate from step S4 and perform explosive welding to obtain a composite plate;

[0010] S6: The composite sheet is subjected to a first cold rolling, a first annealing, a second cold rolling, a second annealing, a third cold rolling, a third annealing, a fourth cold rolling, and slitting in sequence.

[0011] As a further description of the above technical solution:

[0012] The deformation amount of the first cold rolling is 74%, the deformation amount of the second cold rolling is 73%, the deformation amount of the third cold rolling is 52%, and the deformation amount of the fourth cold rolling is 80%.

[0013] As a further description of the above technical solution:

[0014] The first annealing temperature is 1050℃-1080℃, the second annealing temperature is 1120℃-1150℃, and the third annealing temperature is 1110℃-1120℃.

[0015] As a further description of the above technical solution:

[0016] The first annealing, the second annealing, and the third annealing all use pure hydrogen annealing.

[0017] As a further description of the above technical solution:

[0018] The explosive welding in step S4 includes the following steps:

[0019] S41: Photosensitive explosives are sprayed onto tungsten carbide alloy plates to form a photosensitive explosive coating.

[0020] S42: Place the tungsten carbide alloy plate coated with photosensitive explosive on the Hastelloy C276 plate with the photosensitive explosive coating facing upward;

[0021] S43: Turn on the high-intensity light source, which is an electric explosion device comprising a metal wire on the order of 0.1 mm.

[0022] As a further description of the above technical solution:

[0023] The photosensitive explosive is silver acetylene-silver nitrate.

[0024] As a further description of the above technical solution:

[0025] The metal wire is a tungsten wire or a molybdenum wire.

[0026] As a further description of the above technical solution:

[0027] An explosive layer is provided between the photosensitive explosive coating and the tungsten carbide alloy plate.

[0028] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0029] 1. In this invention, by compositing tungsten carbide alloy plates onto existing Hastelloy C276 plates, the nickel-based alloy plates prepared by this invention not only ensure high corrosion resistance on one side of the plate, but also have high overall hardness, reaching 350HV, which meets the hardness and corrosion resistance requirements for use in chemical fillers.

[0030] 2. In this invention, the Hastelloy C276 plate and the tungsten carbide alloy plate are welded together by an explosive method, which can improve the composite rate and composite quality between the Hastelloy C276 plate and the tungsten carbide alloy plate, ensure that the weld does not crack during the rolling process, and ensure that the microstructure and properties of the Hastelloy C276 plate and the tungsten carbide alloy plate are stable, and the composite interface has excellent mechanical properties. Attached Figure Description

[0031] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 This is a flowchart of a production method for a corrosion-resistant nickel-based alloy used as a chemical filler.

[0033] Figure 2 This is a schematic diagram illustrating the explosive welding principle in the production method of a corrosion-resistant nickel-based alloy for chemical fillers.

[0034] Legend:

[0035] 1. High-intensity light source; 2. Photosensitive explosive coating; 3. Explosive layer; 4. Tungsten carbide alloy plate; 5. Hastelloy C276 plate. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0037] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0038] Please see Figure 1-2 This invention provides a method for producing a corrosion-resistant nickel-based alloy for chemical fillers. The nickel-based alloy is rolled from Hastelloy C276 sheet and tungsten carbide alloy sheet, with the tungsten carbide alloy sheet covering the surface of the Hastelloy C276 sheet. The production method includes the following steps:

[0039] S1: Select the Hastelloy C276 plate and the tungsten carbide plate;

[0040] S2: Perform surface treatment on the Hastelloy C276 plate and the tungsten carbide plate to ensure the flatness of the surfaces of the Hastelloy C276 plate and the tungsten carbide plate;

[0041] S3: Clean the surface treated in step S2;

[0042] S4: Place the tungsten carbide alloy plate on top of the Hastelloy C276 plate and perform explosive welding;

[0043] S5: Place a tungsten carbide alloy plate on the other side of the Hastelloy C276 plate from step S4 and perform explosive welding to obtain a composite plate;

[0044] S6: The composite sheet is subjected to a first cold rolling, a first annealing, a second cold rolling, a second annealing, a third cold rolling, a third annealing, a fourth cold rolling, and slitting in sequence.

[0045] The deformation amount in the first cold rolling is 74%, the deformation amount in the second cold rolling is 73%, the deformation amount in the third cold rolling is 52%, and the deformation amount in the fourth cold rolling is 80%. The first annealing temperature is 1050℃-1080℃, the second annealing temperature is 1120℃-1150℃, and the third annealing temperature is 1110℃-1120℃. Through multiple cold rolling processes, the material's microstructure can be fully broken down, ensuring that the material properties meet the requirements.

[0046] The first annealing, the second annealing, and the third annealing all use pure hydrogen annealing. During annealing, because the temperature is still very high, the hydrogen can reduce some of the oxidized metals, thereby protecting the quality of the steel.

[0047] The explosive welding in step S4 includes the following steps:

[0048] S41: Photosensitive explosives are sprayed onto tungsten carbide alloy plates to form a photosensitive explosive coating.

[0049] S42: Place the tungsten carbide alloy plate coated with photosensitive explosive on the Hastelloy C276 plate with the photosensitive explosive coating facing upward;

[0050] S43: Turn on the high-intensity light source, which is an electric explosion device comprising a metal wire on the order of 0.1 mm.

[0051] Intense light shines on the photosensitive explosive coating on the surface of the tungsten carbide alloy sheet, causing the entire coating surface to explode simultaneously and act on the Hastelloy C276 sheet. This causes the tungsten carbide sheet to collide with the Hastelloy C276 sheet, achieving the welding purpose. By employing a method of instantaneously releasing intense light to detonate the photosensitive explosive, a large-area simultaneous detonation of the welding explosive surface is achieved. This ensures that the explosive detonates at all points on the sheet simultaneously, maintaining a relatively constant explosive load at each point. This effectively avoids welding quality problems caused by excessive differences in collision velocity at the welding interface, improves the yield of the sheet material, and reduces waste.

[0052] The photosensitive explosive is silver acetylene-silver nitrate. The metal wire is a tungsten wire or a molybdenum wire.

[0053] An explosive layer is provided between the photosensitive explosive coating and the tungsten carbide alloy plate. This can improve the welding effect.

[0054] Working Principle: By bonding tungsten carbide alloy plates to existing Hastelloy C276 plates, the nickel-based alloy plates prepared by this invention ensure both high corrosion resistance on one side and high overall hardness, reaching 350 HV, which meets the hardness and corrosion resistance requirements for use as chemical fillers. The Hastelloy C276 and tungsten carbide alloy plates are bonded using an explosive welding method, which improves the bonding rate and quality between the two plates. This ensures that the weld does not crack during rolling, and the microstructure and properties of both the Hastelloy C276 and tungsten carbide alloy plates are stable, resulting in excellent mechanical properties at the composite interface.

[0055] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A method for producing a corrosion-resistant nickel-based alloy for chemical fillers, characterized in that... The nickel-based alloy is rolled from Hastelloy C276 sheet and tungsten carbide alloy sheet, with the tungsten carbide alloy sheet covering the surface of the Hastelloy C276 sheet. The production method includes the following steps: S1: Select the Hastelloy C276 plate and the tungsten carbide plate; S2: Perform surface treatment on the Hastelloy C276 plate and the tungsten carbide plate to ensure the flatness of the surfaces of the Hastelloy C276 plate and the tungsten carbide plate; S3: Clean the surface treated in step S2; S4: Place the tungsten carbide alloy plate on top of the Hastelloy C276 plate and perform explosive welding; S5: Place a tungsten carbide alloy plate on the other side of the Hastelloy C276 plate from step S4 and perform explosive welding to obtain a composite plate; S6: The composite sheet is subjected to a first cold rolling, a first annealing, a second cold rolling, a second annealing, a third cold rolling, a third annealing, a fourth cold rolling, and slitting in sequence; The explosive welding in step S4 includes the following steps: S41: Photosensitive explosives are sprayed onto tungsten carbide alloy plates to form a photosensitive explosive coating. S42: Place the tungsten carbide alloy plate coated with photosensitive explosive on the Hastelloy C276 plate with the photosensitive explosive coating facing upwards; S43: Turn on the high-intensity light source, which is an electric explosion device comprising a metal wire on the order of 0.1 mm. The deformation amount of the first cold rolling is 74%, the deformation amount of the second cold rolling is 73%, the deformation amount of the third cold rolling is 52%, and the deformation amount of the fourth cold rolling is 80%. The first annealing temperature is 1050℃-1080℃, the second annealing temperature is 1120℃-1150℃, and the third annealing temperature is 1110℃-1120℃.

2. The method for producing a corrosion-resistant nickel-based alloy for chemical fillers according to claim 1, characterized in that, The first annealing, the second annealing, and the third annealing all use pure hydrogen annealing.

3. The method for producing a corrosion-resistant nickel-based alloy for chemical fillers according to claim 1, characterized in that, The photosensitive explosive is silver acetylene-silver nitrate.

4. The method for producing a corrosion-resistant nickel-based alloy for chemical fillers according to claim 1, characterized in that, The metal wire is a tungsten wire or a molybdenum wire.

5. The method for producing a corrosion-resistant nickel-based alloy for chemical fillers according to claim 1, characterized in that, An explosive layer is provided between the photosensitive explosive coating and the tungsten carbide alloy plate.

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