High-strength composite board for titanium sponge reactor

Abstract

The utility model discloses a high-strength composite board for a titanium sponge reactor, and belongs to the technical field of stainless steel composite boards. The composite plate comprises a stainless steel layer and a carbon steel layer, the thickness of the carbon steel layer is 5-15 mm, the thickness of the stainless steel layer is 12-25 mm, a first groove is formed in the end face of the carbon steel layer, a step face is formed on the back face of the first groove, a second groove is formed in the end face of the stainless steel layer, and the second groove and the first groove are oppositely arranged. The second groove is connected with the step surface; a first welding area is formed between every two adjacent first grooves, a second welding area is formed between every two adjacent second grooves, and a transition layer is arranged on the step face and is basically flush with the matching face of the stainless steel layer. And the workload is reduced, the heat output is reduced, and the influence of the welding sequence on the strength of the joint is reduced to the minimum, so that the safety strength of the joint is ensured, and the long-time safety production of the reactor can be realized.

Description

Technical Field

[0001] The utility model belongs to the technical field of stainless steel composite plates, in particular to a composite plate for a high-strength titanium sponge reactor. Background Art

[0002] "Titanium sponge" generally refers to sponge-like titanium metal produced by, for example, a metal reduction method. Its purity is generally 99.1-99.7% by weight, the total amount of impurity elements is 0.3-0.9% by weight, and the hardness (HB) is 100-157. It is divided into five grades according to the purity. Due to its excellent performance, titanium and titanium alloys are currently widely used in various industries. Currently, titanium sponge is mainly produced by the magnesium method. The reduction distillation step in the production of titanium sponge by the magnesium method requires the use of a reaction vessel. In order to reduce the impact on the quality of titanium sponge, there are certain restrictions on the choice of material for the reaction vessel in the existing technology. Carbon steel plates are generally used to make reactors.

[0003] At present, in order to produce such high-purity sponge titanium, the reaction vessel has a two-layer structure, wherein the inner surface is made of carbon steel containing almost no Ni or Cr, and the outer surface is made of austenitic stainless steel such as SUS304 or SUS316. For example, Chinese patent application No. CN202310401975.4 discloses a composite steel plate for a sponge titanium smelting reactor, wherein the base material of the composite steel plate is stainless steel and the composite material is pure iron, and the manufacturing steps thereof include: (1) polishing the base and composite layers; (2) explosive welding and surface protection; (3) uncombined patching treatment; (4) eliminating the explosion hardening heat treatment and surface protection.

[0004] For example, Chinese patent CN104046798A discloses a composite plate for preparing a sponge titanium high-temperature reactor, wherein the composite plate contains alloy steel and / or non-ferrous metal and carbon steel, wherein the alloy steel is at least one selected from stainless steel, high-chromium ferrite heat-resistant steel and high-chromium nickel heat-resistant steel; preferably stainless steel, and the alloy steel and / or non-ferrous metal is composited with carbon steel by explosion welding.

[0005] Another example is Chinese patent CN114559715A, which discloses a composite plate, a titanium sponge reactor, and a preparation process thereof. The composite plate of this patent includes a stainless steel layer and a carbon steel layer. A connecting layer is provided between the stainless steel layer and the carbon steel layer to composite the two layers. The ratio of the thickness of the stainless steel layer to the thickness of the carbon steel layer is 4:1-1:20, and the thickness of the stainless steel layer and the carbon steel layer is 28-50 mm.

[0006] However, when the composite plates disclosed above are welded to form a reactor, the joints are made of plates of different materials, which greatly troubles the welding process. Moreover, the strength after welding does not meet the requirements for use, resulting in risks to the safety of the reactor. Therefore, this has become an urgent problem to be solved. Summary of the Invention

[0007] 1. Problems to be solved

[0008] In view of the above technical problems, the purpose of the present invention is to provide a high-strength composite plate for a titanium sponge reactor, thereby improving the welding strength at the joints of the composite plate and ensuring the safe use of the reactor.

[0009] 2. Technical solution

[0010] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0011] The purpose of the first aspect of the present invention is to provide a composite plate for a sponge titanium high-temperature reactor, comprising a stainless steel layer and a carbon steel layer. According to the composite plate described in the present invention, in order to reduce production costs, ensure that the service life of the high-temperature reactor prepared using the composite plate described in the present invention is increased, and ensure that the deformation resistance of the high-temperature reactor is enhanced, the thickness of the carbon steel layer is 5-15 mm, and the thickness of the stainless steel layer is 12-25 mm.

[0012] The carbon steel layer has an end surface formed with a first groove, and a step surface is formed on the back of the first groove. The stainless steel layer has an end surface formed with a second groove, the second groove is arranged opposite to the first groove, and the second groove is connected to the step surface.

[0013] A first welding area is formed between the two adjacent first grooves, a second welding area is formed between the two adjacent second grooves, and a transition layer is provided on the step surface and is substantially flush with the mating surface of the stainless steel layer.

[0014] In the present invention, unless otherwise stated, the “carbon steel” used herein refers to an iron-carbon alloy having a carbon mass fraction of less than 2.11%, which generally also contains a small amount of silicon, manganese, sulfur, phosphorus and other elements, and may also be referred to as carbon steel.

[0015] According to the composite plate of the present invention, the stainless steel and carbon steel are both in the form of plates.

[0016] Unless otherwise specified, the "welding" in the present invention refers to conventional welding processes other than explosive welding, and conventional welding processes may include at least one of gas welding, manual arc welding, resistance welding, arc welding, argon arc welding, induction welding and laser welding.

[0017] According to any embodiment of the first aspect of the present invention, the slopes of the first bevel and the second bevel are the same or different.

[0018] According to any implementation scheme of the first aspect of the present utility model, the slope of the first groove is 32±2.5°, and the slope of the second groove is 32±2.5°.

[0019] According to any implementation scheme of the first aspect of the present utility model, the height of the step surface is 1-2 mm and the width is 3-4 mm.

[0020] According to any embodiment of the first aspect of the present utility model, preferably, the thickness of the carbon steel layer is 12 mm, and the thickness of the stainless steel layer is 20 mm.

[0021] According to any implementation scheme of the first aspect of the purpose of the present utility model, the transition layer is arc welded, and the arc welding wire is made of ER309 stainless steel or wear-resistant flux-cored gas shielded welding wire YD619.

[0022] According to any embodiment of the first aspect of the present invention, the material of the stainless steel layer is selected from one of SUS321, SUS310, SUS304, SUS316, and HRJY1, and the material of the carbon steel layer is selected from one of Q245R, Q345D, Q345E, Q345R, and Q345R. Unless otherwise specified, the carbon steel plate used is Q235R, purchased from Wuyang Iron and Steel Company; the stainless steel plate used is HRJY1, purchased from Taiyuan Iron and Steel Company.

[0023] The above materials are all commercially available products, where "HR" refers to heat-resistant steel, JY refers to the abbreviation of Jiuyi Company, and HRJY1 is the model of the commercially available product.

[0024] 3. Beneficial effects

[0025] Compared with the prior art, the beneficial effects of the present invention are:

[0026] The high-strength titanium sponge reactor composite plate of the utility model forms a step surface on the carbon steel layer, and forms a transition layer on the step surface, and then welds the groove. The transition layer can improve the dilution rate. The second welding area is first welded, and then the first welding area is welded. This not only reduces the workload, but also reduces the heat output, and minimizes the influence of the welding sequence on the joint strength, thereby ensuring the safety strength of the joint and enabling the reactor to be safely produced for a long time. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. However, it should be understood that these drawings are designed for illustrative purposes only and are not intended to limit the scope of the present invention. In addition, unless otherwise specified, these drawings are intended only to conceptually illustrate the structures described herein and are not necessarily drawn to scale.

[0028] Figure 1 This is a schematic structural diagram of a composite plate for a high-temperature titanium sponge reactor of the present invention;

[0029] Figure 2 This is a partial schematic diagram of the composite plate used in the sponge titanium high-temperature reactor of the present invention.

[0030] Description of reference numerals:

[0031] 11. Stainless steel layer; 111. Second groove; 112. Second welding area; 12. Carbon steel layer; 121. First groove; 122. First welding area; 123. Step surface; 124. Transition layer. DETAILED DESCRIPTION

[0032] The present disclosure may be more readily understood by reference to the following description in conjunction with the accompanying drawings and examples, all of which constitute a part of this disclosure. It should be understood that the present disclosure is not limited to the specific products, methods, conditions, or parameters described and / or illustrated herein. Further, the terms used herein are for the purpose of describing specific embodiments by way of example only and are not intended to be limiting unless otherwise indicated.

[0033] It should also be understood that, for the sake of clarity, certain features of the present disclosure may be described herein in the context of separate embodiments, but may also be provided in combination with each other in a single embodiment. That is, unless clearly incompatible or specifically not included, each separate embodiment is considered to be combinable with any other embodiment, and the combination is considered to represent another different embodiment. Conversely, for the sake of simplicity, various features of the present disclosure described in the context of a single embodiment may also be provided individually or in any sub-combination. Finally, although a particular embodiment may be described as part of a series of steps or part of a more general structure, each step or sub-structure itself may also be considered to be an independent embodiment.

[0034] Unless otherwise indicated, it should be understood that each individual element in a list and each combination of individual elements in that list will be interpreted as a different embodiment. For example, a list of embodiments expressed as "A, B, or C" should be interpreted to include embodiments "A," "B," "C," "A or B," "A or C," "B or C," or "A, B, or C."

[0035] In this disclosure, the singular forms of the articles "a," "an," and "the" also include the corresponding plural reference, and a reference to a specific value includes at least that specific value unless the context clearly dictates otherwise. Thus, for example, a reference to "a substance" is a reference to at least one of that substance and equivalents thereof.

[0036] Terms including ordinal numbers such as "first" and "second" may be used to explain various components or fluids, but these components and fluids are not limited by these terms. Therefore, without departing from the teachings of the present disclosure, these terms are only used to distinguish the component / fluid from another component / fluid.

[0037] When items are described by using the conjunction terms "... and / or..." etc., the description should be understood to include any one and all combinations of one or more of the associated listed items.

[0038] In general, the use of the term "about" indicates an approximate value that can vary depending on the desired properties obtained by the disclosed subject matter and will be interpreted in a context-dependent manner based on function. Therefore, one of ordinary skill in the art will be able to interpret a certain degree of difference on a case-by-case basis. In some cases, the number of important figures used when expressing a particular value can be a representative technique for determining the difference allowed by the term "about". In other cases, a gradient in a range of values ​​can be used to determine the range of differences allowed by the term "about". Further, all ranges in this disclosure are inclusive and combinable, and reference to a value stated in a range includes every value within that range.

[0039] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains; any and all combinations of terms and / or terms used herein include one or more of the associated listed items.

[0040] like Figure 1 、 Figure 2 As shown, the composite plate for the sponge titanium high temperature reactor of this embodiment includes a stainless steel layer 11 and a carbon steel layer 12. The stainless steel layer 11 and the carbon steel layer 12 are explosively composited. The specific preparation method includes the following specific steps: the stainless steel layer 11 is made of stainless steel 316, and the carbon steel layer is made of Q345R. The steps include: (1) surface polishing; (2) explosive welding and surface protection.

[0041] According to the composite plate of the utility model, in order to reduce production costs, ensure that the service life of the high-temperature reactor prepared by using the composite plate of the utility model is increased, and ensure that the deformation resistance of the high-temperature reactor is enhanced, combined with Figure 2As shown, the thickness L2 of the carbon steel layer 12 is 12 mm, and the thickness L1 of the stainless steel layer 11 is 20 mm.

[0042] In this embodiment, a first groove 121 is formed on the end surface of the carbon steel layer 12, and a step surface 123 is formed on the back side of the first groove 121. A second groove 111 is formed on the end surface of the stainless steel layer 11. The second groove 111 is arranged opposite the first groove 121 and is connected to the step surface 123. A first welding area 122 is formed between two adjacent first grooves 121, and a second welding area 112 is formed between two adjacent second grooves 111. A transition layer 124 is provided on the step surface 123 to be substantially flush with the mating surface of the stainless steel layer 11. The term "substantially flush" here means that there may be pits or local unevenness.

[0043] A step surface is formed on the carbon steel layer, and a transition layer is formed on the step surface. Then, the groove is welded. The transition layer can improve the dilution rate. The second welding area is formed by welding first, and then the first welding area is formed by welding. This not only reduces the workload, but also reduces the heat output, and minimizes the influence of the welding sequence on the joint strength, thereby ensuring the safety strength of the joint and enabling the reactor to be safely produced for a long time.

[0044] In this embodiment, the stainless steel and carbon steel are both in the form of plates. Unless otherwise specified, the term "welding" in this utility model refers to conventional welding processes other than explosive welding, and conventional welding processes may include at least one of gas welding, manual arc welding, resistance welding, arc welding, argon arc welding, induction welding, and laser welding.

[0045] Furthermore, the first groove 121 and the second groove 111 have the same or different slopes. Preferably, the first groove 121 and the second groove 111 have the same slope, specifically, the slope a of the first groove 121 is 33°, and the slope a of the second groove 111 is 33°.

[0046] Combine Figure 2 As shown, the height H of the step surface 123 is 2 mm and the width D is 3 mm. The transition layer 124 is arc welded, and the arc welding wire is made of 309. The stainless steel layer 11 is made of SUS316 purchased from Taiyuan Iron and Steel Company, and the carbon steel layer 12 is made of Q345R purchased from Chongqing Iron and Steel Company.

[0047] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A composite plate for a high-strength titanium sponge reactor, comprising a stainless steel layer (11) and a carbon steel layer (12), characterized in that: The carbon steel layer (12) has a first groove (121) formed on its end surface, and a step surface (123) is formed on the back of the first groove (121). The stainless steel layer (11) has a second groove (111) formed on its end surface, and the second groove (111) is arranged opposite to the first groove (121), and the second groove (111) is connected to the step surface (123). A first welding area (122) is formed between two adjacent first grooves (121), a second welding area (112) is formed between the two adjacent second grooves (111), and a transition layer (124) is provided at the step surface (123) and is substantially flush with the mating surface of the stainless steel layer (11).

2. The high-strength titanium sponge reactor composite plate according to claim 1, characterized in that: The first bevel (121) and the second bevel (111) have the same or different inclinations.

3. The high-strength titanium sponge reactor composite plate according to claim 2, characterized in that: The slope of the first groove (121) is 32±2.5°, and the slope of the second groove (111) is 32±2.5°.

4. The high-strength titanium sponge reactor composite plate according to claim 3, characterized in that: The step surface (123) has a height of 1-2 mm and a width of 3-4 mm.

5. The high-strength titanium sponge reactor composite plate according to any one of claims 1 to 4, characterized in that: The thickness of the carbon steel layer (12) is 5-15 mm, and the thickness of the stainless steel layer (11) is 12-25 mm.

6. The high-strength composite plate for titanium sponge reactor according to claim 5, characterized in that: The thickness of the carbon steel layer (12) is 12 mm, and the thickness of the stainless steel layer (11) is 20 mm.

7. The high-strength composite plate for titanium sponge reactor according to claim 6, characterized in that: The material of the stainless steel layer (11) is selected from one of SUS321, SUS310, SUS304, and SUS316, and the material of the carbon steel layer (12) is selected from one of Q245R, Q345D, Q345E, Q345R, and Q345R.

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