Method for processing long niobium-tungsten alloy plate

Abstract

The present disclosure provides a processing method of a niobium-tungsten alloy long plate piece, and belongs to the field of mechanical manufacturing. The processing method comprises the following steps: providing a plurality of niobium-tungsten alloy flat plates; rolling the plurality of niobium-tungsten alloy flat plates along the length direction of the niobium-tungsten alloy flat plates respectively to obtain a plurality of niobium-tungsten alloy arc-shaped plates; assembling the plurality of niobium-tungsten alloy arc-shaped plates so that the side surfaces of two adjacent niobium-tungsten alloy arc-shaped plates are butted together; sequentially welding the to-be-welded surfaces of two adjacent niobium-tungsten alloy arc-shaped plates by a vacuum electron beam to obtain a welded piece, wherein the to-be-welded surfaces are the side surfaces of two adjacent niobium-tungsten alloy arc-shaped plates; and flattening the welded piece to obtain a niobium-tungsten alloy long plate piece. The method can reduce the processing cost of the niobium-tungsten alloy long plate piece.

Description

TECHNICAL FIELD

[0001] The present disclosure belongs to the field of mechanical manufacturing, and particularly relates to a processing method of a long plate of a niobium-tungsten alloy. BACKGROUND

[0002] Due to the limitation of the development of raw material smelting manufacturing level, the maximum finished plate size of niobium-tungsten alloy plate (NBW5-2) cannot exceed 3 m. However, the actual demand for long plate of niobium-tungsten alloy is several meters or tens of meters in length. Therefore, a single piece of niobium-tungsten alloy plate cannot meet the actual demand, and multiple pieces of niobium-tungsten alloy plate need to be spliced to manufacture the long plate of niobium-tungsten alloy.

[0003] In the related art, in order to avoid the phenomenon of joint oxidation of the niobium-tungsten alloy plate during welding, the niobium-tungsten alloy plate is generally welded by using vacuum electron beam welding. During welding, multiple pieces of niobium-tungsten alloy plate to be welded together are sequentially fixed on a workbench in a vacuum chamber along the length direction of the niobium-tungsten alloy plate. Then, a high-energy electron beam is controlled to sequentially hit the splicing position between the adjacent two pieces of niobium-tungsten alloy plate, so that the side edges of the two pieces of niobium-tungsten alloy plate can be melted together under the impact of the electron beam. Finally, the niobium-tungsten alloy plates are welded together to obtain the required long plate of niobium-tungsten alloy.

[0004] However, the long plate of niobium-tungsten alloy obtained by using the above method needs to be sequentially placed in the vacuum chamber along the length direction of the niobium-tungsten alloy plate before welding, which requires a vacuum chamber with a size approximately the same as the length of the long plate of niobium-tungsten alloy, resulting in high welding cost. SUMMARY

[0005] The processing method of the long plate of niobium-tungsten alloy provided by the embodiments of the present disclosure can process the long plate of niobium-tungsten alloy at low cost. The technical solution is as follows.

[0006] The processing method of the long plate of niobium-tungsten alloy provided by the embodiments of the present disclosure comprises the following steps: providing multiple pieces of niobium-tungsten alloy flat plate; rolling the multiple pieces of niobium-tungsten alloy flat plate along the length direction of the niobium-tungsten alloy flat plate respectively to obtain multiple pieces of niobium-tungsten alloy arc-shaped plate; assembling the multiple pieces of niobium-tungsten alloy arc-shaped plate so that the side surfaces between the adjacent two pieces of niobium-tungsten alloy arc-shaped plate are butted together; sequentially welding the corresponding welding surfaces between the adjacent two pieces of niobium-tungsten alloy arc-shaped plate by using a vacuum electron beam to obtain a welded piece, the welding surface being the side surface between the adjacent two pieces of niobium-tungsten alloy arc-shaped plate; and flattening the welded piece to obtain the long plate of niobium-tungsten alloy.

[0007] In a further implementation form of the present disclosure, the rolling of the plurality of Nb-W alloy flat plates along the length direction of the Nb-W alloy flat plates respectively to obtain a plurality of Nb-W alloy arc plates comprises: rolling the Nb-W alloy flat plates by a plate rolling machine; and correcting the rolled Nb-W alloy flat plates by a sample arc-shaped piece, so that an outer arc surface of the sample arc-shaped piece is attached to an inner arc surface of the rolled Nb-W alloy flat plates to obtain the Nb-W alloy arc plates.

[0008] In a further implementation form of the present disclosure, the assembling of the plurality of Nb-W alloy arc plates such that side surfaces of adjacent two Nb-W alloy arc plates are butted together comprises: splicing the plurality of Nb-W alloy arc plates together, so that adjacent two Nb-W alloy arc plates are located on a same arc; and clamping and fixing the Nb-W alloy arc plates together.

[0009] In a further implementation form of the present disclosure, the clamping and fixing of the Nb-W alloy arc plates after the adjustment of the positions comprises: fixing adjacent two Nb-W alloy arc plates on a rotating platform by a clamping device, the clamping device comprising a base and two pressing plates, the base being connected to the rotating platform, the base having a first arc surface for being attached to an inner arc surface of the Nb-W alloy arc plates, the two pressing plates being located on a same side of the base and connected to the base, the pressing plates having a second arc surface opposite to the first arc surface and for being attached to an outer arc surface of the Nb-W alloy arc plates.

[0010] In a further implementation form of the present disclosure, the welding of the corresponding to-be-welded surfaces of adjacent two Nb-W alloy arc plates by the vacuum electron beam in sequence to obtain a welded piece comprises: feeding the assembled Nb-W alloy arc plates into a vacuum chamber; and rotating the assembled Nb-W alloy arc plates, and bombarding a to-be-welded surface of adjacent two Nb-W alloy arc plates in sequence by an electron beam, so that the adjacent two Nb-W alloy arc plates are welded together.

[0011] In a further implementation form of the present disclosure, the assembling of the plurality of Nb-W alloy arc plates such that side surfaces of adjacent two Nb-W alloy arc plates are butted together further comprises: winding the welded Nb-W alloy arc plates to form a spiral cylindrical structure having at least one layer; and assembling the spiral cylindrical structure with at least one Nb-W alloy arc plate.

[0012] The method further comprises: welding the assembled spiral cylinder structure and at least one of the niobium-tungsten alloy arc-shaped plates together by a vacuum electron beam.

[0013] In another implementation manner of the present disclosure, the step of assembling the spiral cylinder structure and at least one of the niobium-tungsten alloy arc-shaped plates again comprises: butting at least one of the niobium-tungsten alloy arc-shaped plates on the spiral cylinder structure, so that two adjacent niobium-tungsten alloy arc-shaped plates to be welded are located on the same circular arc; and clamping and fixing the at least one of the niobium-tungsten alloy arc-shaped plates in position on the spiral cylinder structure.

[0014] In another implementation manner of the present disclosure, the processing method further comprises: vacuum heat preservation on the initial welding piece before flattening the initial welding piece to obtain the niobium-tungsten alloy long plate piece.

[0015] In another implementation manner of the present disclosure, the processing method further comprises: cleaning and polishing the welding surface of each of the niobium-tungsten alloy arc-shaped plates before welding the welding surface of each of the niobium-tungsten alloy arc-shaped plates by a vacuum electron beam.

[0016] In another implementation manner of the present disclosure, the step of flattening the welding piece to obtain the niobium-tungsten alloy long plate piece comprises: straightening one end of the niobium-tungsten alloy arc-shaped plates welded together; and feeding the straightened one end of the niobium-tungsten alloy arc-shaped plates into a flattening machine until all the niobium-tungsten alloy arc-shaped plates welded together are straightened.

[0017] The technical scheme provided by the embodiments of the present disclosure has the following beneficial effects:

[0018] The niobium-tungsten alloy long plate piece is processed by the above method. Since the method needs to first roll each of the niobium-tungsten alloy flat plates to obtain niobium-tungsten alloy arc-shaped plates, then assemble the niobium-tungsten alloy arc-shaped plates, and then weld the niobium-tungsten alloy arc-shaped plates by a vacuum electron beam, the size of the vacuum chamber required in the welding process can be greatly reduced due to the small space occupied by the rolled niobium-tungsten alloy arc-shaped plates, and thus a longer niobium-tungsten alloy long plate piece can be welded in a smaller vacuum chamber, thereby greatly saving the welding cost. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical scheme in the embodiments of the present disclosure, the drawings needed in the embodiment description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present disclosure, and other drawings can be obtained by those skilled in the art without any creative effort.

[0020] Figure 1 A flow chart of a processing method of a long niobium-tungsten alloy plate provided by an embodiment of the present disclosure is shown in FIG. 4;

[0021] Figure 2 A flow chart of another processing method of a long niobium-tungsten alloy plate provided by an embodiment of the present disclosure is shown in FIG. 5;

[0022] Figure 3 A structural schematic diagram of a niobium-tungsten alloy plate provided by an embodiment of the present disclosure is shown in FIG. 6;

[0023] Figure 4 A structural schematic diagram of a processed niobium-tungsten alloy plate provided by an embodiment of the present disclosure is shown in FIG. 7;

[0024] Figure 5 A correction schematic diagram of a sample round arc piece provided by an embodiment of the present disclosure is shown in FIG. 8;

[0025] Figure 6 An assembly schematic diagram of a niobium-tungsten alloy arc plate provided by an embodiment of the present disclosure is shown in FIG. 9;

[0026] Figure 7 A Figure 6 An enlarged structural schematic diagram of a clamping device is shown in FIG. 10;

[0027] Figure 8 A welding schematic diagram of a niobium-tungsten alloy arc plate provided by an embodiment of the present disclosure is shown in FIG. 11;

[0028] Figure 9 A welding schematic diagram of a wound niobium-tungsten alloy arc plate provided by an embodiment of the present disclosure is shown in FIG. 12;

[0029] Figure 10 A flattening schematic diagram of a niobium-tungsten alloy arc plate provided by an embodiment of the present disclosure is shown in FIG. 13.

[0030] The meanings of the symbols in the figures are as follows:

[0031] 100, a niobium-tungsten alloy arc plate;

[0032] 200, a clamping device; 201, a base; 202, a pressing plate; 2011, a first circular arc surface; 2021, a second circular arc surface;

[0033] 300, a rotating platform; 301, a positioning groove; 400, a first bolt; 500, a second bolt; 600, a sample round arc piece. DETAILED DESCRIPTION

[0034] To make the purpose, technical solutions and advantages of the present disclosure clearer, the embodiments of the present disclosure will be described in further detail below with reference to the drawings.

[0035] The embodiments of the present disclosure provide a processing method of a long niobium-tungsten alloy plate, as shown in FIG. 4. Figure 1As shown, the processing method comprises:

[0036] S101: Provide a plurality of niobium-tungsten alloy flat plates.

[0037] In some examples, the step S101 comprises: processing the niobium-tungsten alloy plate to obtain a plurality of niobium-tungsten alloy flat plates of a desired size.

[0038] In this embodiment, the niobium-tungsten alloy flat plates are obtained by cutting the niobium-tungsten alloy plate after leaving the factory to obtain niobium-tungsten alloy flat plates of appropriate size.

[0039] When cutting, the niobium-tungsten alloy plate after leaving the factory can be cut by a laser cutting machine.

[0040] By cutting the niobium-tungsten alloy plate after leaving the factory, preparation for the subsequent step of rolling the niobium-tungsten alloy flat plate can be made in advance.

[0041] S102: Roll each of the plurality of niobium-tungsten alloy flat plates along the length direction of the niobium-tungsten alloy flat plate to obtain a plurality of niobium-tungsten alloy arc-shaped plates.

[0042] In this embodiment, the niobium-tungsten alloy flat plates can be rolled by a plate rolling machine to become niobium-tungsten alloy arc-shaped plates of arc-shaped structure.

[0043] S103: Assemble the plurality of niobium-tungsten alloy arc-shaped plates so that the side surfaces of adjacent two niobium-tungsten alloy arc-shaped plates are butted together.

[0044] In this embodiment, by assembling and fixing the plurality of niobium-tungsten alloy arc-shaped plates together, preparation for the subsequent step of welding can be made in advance.

[0045] S104: Weld the corresponding to-be-welded surfaces of adjacent two niobium-tungsten alloy arc-shaped plates in sequence by vacuum electron beam to obtain a welded piece, and the to-be-welded surfaces are the side surfaces between the adjacent two niobium-tungsten alloy arc-shaped plates.

[0046] In this embodiment, vacuum electron beam welding is adopted for welding, which can avoid the performance damage of joint oxidation to the niobium-tungsten alloy arc-shaped plates during the welding process.

[0047] S105: Flatten the welded piece to obtain a niobium-tungsten alloy long plate piece.

[0048] By the above method of processing the niobium-tungsten alloy long plate piece, since the method requires that the niobium-tungsten alloy flat plates are first rolled to obtain niobium-tungsten alloy arc-shaped plates, then the niobium-tungsten alloy arc-shaped plates are assembled, and then the niobium-tungsten alloy arc-shaped plates are welded by vacuum electron beam, the space occupied by the rolled niobium-tungsten alloy arc-shaped plates can be greatly reduced, thereby the size of the vacuum chamber required during the welding process can be greatly reduced, and then a longer niobium-tungsten alloy long plate piece can be welded in a smaller vacuum chamber, thereby the welding cost can be greatly saved.

[0049] Figure 2 Another flowchart of the processing method of the long plate of the niobium-tungsten alloy provided by the embodiment of the present disclosure is provided, which is combined with Figure 2 The processing method comprises the following steps.

[0050] S201: Provide a plurality of flat plates of the niobium-tungsten alloy.

[0051] In the embodiment, the NBW5-2 niobium-tungsten alloy plate after leaving the factory can be cut into the flat plate of the niobium-tungsten alloy with the thickness of 5 mm, the width B of 260±0.5 mm, and the length A of 2510±1 mm by the laser cutting machine (see Figure 3 ).

[0052] Of course, after cutting, the length C of the flat plate of the niobium-tungsten alloy is processed to 2500±1 mm by the mechanical processing method, the roughness of the two side surfaces in the length direction is Ra6.3, and the perpendicularity is ≤0.05 mm (see Figure 4 ).

[0053] By mechanically processing the two side surfaces in the length direction of the flat plate of the niobium-tungsten alloy, the flatness of the two side surfaces can be improved to prepare for subsequent welding.

[0054] S202: Roll the plurality of flat plates of the niobium-tungsten alloy along the length direction of the flat plate of the niobium-tungsten alloy respectively to obtain a plurality of arc-shaped plates of the niobium-tungsten alloy.

[0055] Optionally, the step S202 can be realized by the following steps.

[0056] 2021: Roll the flat plate of the niobium-tungsten alloy by the plate rolling machine.

[0057] In the embodiment, the flat plate of the niobium-tungsten alloy can be quickly rolled into the arc-shaped structure by the plate rolling machine.

[0058] 2022: Correct the flat plate of the niobium-tungsten alloy after rolling by the sample arc-shaped piece, so that the outer arc surface of the sample arc-shaped piece is attached to the inner arc surface of the flat plate of the niobium-tungsten alloy after rolling to obtain the arc-shaped plate of the niobium-tungsten alloy.

[0059] In the embodiment, the flat plate of the niobium-tungsten alloy after rolling can be corrected by the sample arc-shaped piece, so that the corresponding arc shape of the flat plate of the niobium-tungsten alloy after rolling is a standard consistent arc shape, which can prepare for subsequent assembly in advance.

[0060] Exemplarily, the processed flat plate of the NBW5-2 niobium-tungsten alloy can be rolled into the circular arc shape by the plate rolling machine, so that the flat plate of the NBW5-2 niobium-tungsten alloy after rolling is the arc-shaped structure corresponding to the radius R1193.6.

[0061] Meanwhile, the NBW5-2 niobium-tungsten alloy flat plate after rolling can be checked by the sample arc piece. If the gap between the arc structure corresponding to the sample arc piece and the NBW5-2 niobium-tungsten alloy flat plate is less than or equal to 3 mm, the niobium-tungsten alloy flat plate after rolling is the required niobium-tungsten alloy arc plate. If the gap between the arc structure corresponding to the sample arc piece and the NBW5-2 niobium-tungsten alloy flat plate does not meet the above condition, the niobium-tungsten alloy flat plate after rolling needs to be re-rolled in the plate rolling machine until the niobium-tungsten alloy flat plate after rolling meets the above requirements.

[0062] Figure 5 The sample arc piece correction schematic provided for the embodiment of the present disclosure, in combination with Figure 5 When checking the curvature of the NBW5-2 niobium-tungsten alloy flat plate after rolling by the sample arc piece 600, the sample arc piece 600 is fixed on the workbench, and then the niobium-tungsten alloy flat plate 100 after rolling is fixed outside the sample arc piece 600, so that the outer arc surface of the sample arc piece is attached together with the inner arc surface of the niobium-tungsten alloy flat plate after rolling. The corresponding radius of the sample arc piece 600 is 1193.6 mm, and the gap d between the arc structures corresponding to the niobium-tungsten alloy flat plate is less than or equal to 3 mm.

[0063] S203: Splice multiple niobium-tungsten alloy arc plates together so that the adjacent two niobium-tungsten alloy arc plates are located on the same circular arc.

[0064] In the embodiment, the adjacent two niobium-tungsten alloy arc plates can be directly butt-jointed together so as to be located on the same circular arc.

[0065] Exemplarily, when the niobium-tungsten alloy arc plates are butt-jointed together, the number can be 2-5, so that the niobium-tungsten alloy arc plates do not exceed the circular arc where the niobium-tungsten alloy arc plates are located, and the adjacent two niobium-tungsten alloy arc plates are not located on the same circular arc. Of course, the number of niobium-tungsten alloy arc plates is designed according to actual requirements.

[0066] Figure 6 The assembly schematic of the niobium-tungsten alloy arc plate provided for the embodiment of the present disclosure, in combination with Figure 6 In the embodiment, the niobium-tungsten alloy arc plate 100 is three, and the three niobium-tungsten alloy arc plates 100 can be butt-jointed in sequence to enclose a whole circle.

[0067] S204: Fix the adjacent two niobium-tungsten alloy arc plates on the rotating platform by the clamping device.

[0068] The clamping device 200 comprises a base 201 and two pressing plates 202. The base 201 is fixed on the rotating platform 300, and the base 201 has a first circular arc surface 2011 for being attached to the inner arc surface of the Nb-W alloy arc-shaped plate 100. The two pressing plates 202 are arranged at intervals on the same side of the base 201, and the two pressing plates 202 are connected with the base 201. Each pressing plate 202 has a second circular arc surface 2021, which is arranged opposite to the first circular arc surface 2011 and is used for being attached to the outer arc surface of the Nb-W alloy arc-shaped plate 100.

[0069] Figure 7 For Figure 6 The enlarged structural schematic view of the clamping device is shown in FIG. 2. Figure 7 When the above clamping device 200 is used to clamp and assemble two adjacent Nb-W alloy arc-shaped plates 100, the base 201 can be attached to the inner arc surfaces of the two adjacent Nb-W alloy arc-shaped plates 100 in advance, and then the base 201 is fixed on the rotating platform 300 through the first bolts 400. Then, the two pressing plates 202 are arranged on the outer side of the base 201, and the second circular arc surface 2021 of one of the two pressing plates 202 is attached to the outer arc surface of one of the two adjacent Nb-W alloy arc-shaped plates 100. The second circular arc surface 2021 of the other pressing plate 202 is attached to the outer arc surface of the other Nb-W alloy arc-shaped plate 100, and the pressing plates 202 are fixed on the base 201 through the second bolts 500, respectively. During the assembly, the gap between the two adjacent Nb-W alloy arc-shaped plates 100 is ensured to be ≤0.1 mm, and the misalignment is ≤0.3 mm (the so-called misalignment refers to that when the two adjacent Nb-W alloy arc-shaped plates are butted, one Nb-W alloy arc-shaped plate protrudes the other Nb-W alloy arc-shaped plate in the thickness direction of the Nb-W alloy arc-shaped plate).

[0070] In addition, in the embodiment, the two pressing plates 202 are arranged at intervals, and the space between the two pressing plates 202 is provided for the welding tool to extend into. The clamping device 200 is fixed on the rotating platform 300 through the bolts.

[0071] For example, in order to facilitate the fixation of the clamping device 200 on the rotating platform 300, a plurality of strip-shaped positioning grooves 301 are arranged on the rotating platform 300, and the plurality of positioning grooves 301 are arranged at intervals along the circumferential direction of the center of the rotating platform 300, and each positioning groove 301 extends along the radial direction of the rotating platform 300.

[0072] The positioning groove 301 is used for positioning when the two adjacent Nb-W alloy arc-shaped plates are butted and assembled on the rotating platform.

[0073] For example, when positioning the Nb-W alloy arc-shaped plates on the rotating platform, one Nb-W alloy arc-shaped plate can be positioned between the continuous positioning grooves 301 in the first group (3 in number, generally at least 2 in number), and then another Nb-W alloy arc-shaped plate can be positioned between the continuous positioning grooves 301 in the second group and be butted together with the first Nb-W alloy arc-shaped plate. Figure 6

[0074] In order to facilitate the positioning of the Nb-W alloy arc-shaped plates, the central angle corresponding to the Nb-W alloy arc-shaped plates can be an integer multiple of the central angle corresponding to the adjacent positioning grooves 301. That is, one Nb-W alloy arc-shaped plate corresponds to the positioning grooves 301 between the corresponding several positioning grooves 301. For example, Figure 6 In this embodiment, one Nb-W alloy arc-shaped plate corresponds to three positioning grooves.

[0075] S205: The surfaces to be welded of the adjacent two Nb-W alloy arc-shaped plates after assembly are cleaned and polished, and the surfaces to be welded are the side surfaces between the adjacent two Nb-W alloy arc-shaped plates.

[0076] In this embodiment, the surfaces to be welded can be polished to a metallic luster by using a Φ60*30 stainless steel wire roller, and then the Nb-W alloy arc-shaped plates are cleaned and degreased to white silk cloth without black by using white silk cloth dipped in acetone or sewage alcohol. In this way, the oxide film on the surface of the Nb-W alloy arc-shaped plate can be removed to avoid affecting the welding quality in the welding process.

[0077] S206: The surfaces to be welded corresponding to the adjacent two Nb-W alloy arc-shaped plates are welded in sequence by a vacuum electron beam.

[0078] Optionally, step S206 can be implemented by the following steps:

[0079] 2061: The Nb-W alloy arc-shaped plates assembled together are sent into a vacuum chamber.

[0080] 2062: The Nb-W alloy arc-shaped plates assembled together are rotated, and an electron beam is used to bombard one of the surfaces to be welded of the adjacent two Nb-W alloy arc-shaped plates in sequence, so that the adjacent two Nb-W alloy arc-shaped plates are welded together.

[0081] In this embodiment, the Nb-W alloy arc-shaped plates after assembly are moved into the vacuum chamber as a whole, so that the Nb-W alloy arc-shaped plates can be vacuum electron welded under the bombardment of the high-energy electron beam.

[0082] Figure 8 The welding schematic diagram of the Nb-W alloy arc-shaped plates provided by the embodiments of the present disclosure is shown in FIG. 7. Figure 8 When welding, the rotating platform is moved into the vacuum chamber as a whole, and then the electron gun 700 is arranged on one side of the rotating platform, so that the electron beam emitted by the electron gun 700 can be aligned with the surface to be welded.​

[0083] When welding, the vertical upward welding method is used (the electric arc moves from bottom to top along the surface to be welded).

[0084] In this embodiment, the welding process parameters are shown in Table 1 below.

[0085] Table 1 Electron Beam Welding Parameters

[0086]

[0087]

[0088] according to Figure 8 As shown, the first seam (the first niobium-tungsten alloy arc plate and the second niobium-tungsten alloy arc plate) is welded first, using vertical welding.

[0089] Then, the rotating platform is controlled to align the second seam (the second niobium-tungsten alloy arc plate and the third niobium-tungsten alloy arc plate) with the center of the electron gun, and the second seam is welded.

[0090] S207: Vacuum insulation is applied to the niobium-tungsten alloy arc-shaped plates that have been welded together.

[0091] The welded niobium-tungsten alloy arc plate is kept at a high temperature in a vacuum chamber for 1-3 hours (e.g., 1.5 hours). After the heat preservation is completed, the welded niobium-tungsten alloy arc plate is removed from the vacuum chamber.

[0092] The purpose of vacuum insulation is to prevent air from entering the welded niobium-tungsten alloy arc plates, which would cause harmful processes such as oxidation and hydrogen absorption in the weld. The longer the insulation time, the better.

[0093] S208: The niobium-tungsten alloy arc plates that have been welded together are wound up so that the welded niobium-tungsten alloy arc plates form a spiral cylindrical structure with at least one layer.

[0094] In this embodiment, before winding the welded niobium-tungsten alloy arc, the welded niobium-tungsten alloy arc can be disassembled from the rotating platform, and then one side of the welded niobium-tungsten alloy arc plate can be wound to form a spiral cylindrical structure, which provides space for subsequent welding.

[0095] according to Figure 9 As shown, the niobium-tungsten alloy arc plates that have already been welded together are rolled up so that they are located inside the clamping device. This saves space and allows welding to continue on the rotating platform.

[0096] S209: Assemble the spiral cylindrical structure with at least one niobium-tungsten alloy arc plate.

[0097] In this embodiment, the niobium-tungsten alloy arc-shaped plates (spiral cylindrical structure) that have been welded together are sequentially assembled with other unwelded niobium-tungsten alloy arc-shaped plates, so that the spiral cylindrical structure and the other unwelded niobium-tungsten alloy arc-shaped plates are multilayer cylindrical, which can further save space.

[0098] In addition, when assembling again, the assembling method according to the foregoing step S204 is still followed.

[0099] Referring to Figure 9 The niobium-tungsten alloy arc-shaped plates that have been welded together are wound around the center of the rotating platform as an axis, so that the wound niobium-tungsten alloy arc-shaped plates move towards the center of the rotating platform, the niobium-tungsten alloy arc-shaped plates to be welded are located outside the wound niobium-tungsten alloy arc-shaped plates, and the niobium-tungsten alloy arc-shaped plates to be welded are assembled on the rotating platform again through the clamping device.

[0100] S210: The welding surfaces of the assembled spiral cylindrical structure and the at least one niobium-tungsten alloy arc-shaped plate are cleaned and polished.

[0101] In this embodiment, the welding surfaces are cleaned and polished again, and the cleaning and polishing method is exactly the same as that in the foregoing step S205, which will not be described here.

[0102] S211: The assembled spiral cylindrical structure and the at least one niobium-tungsten alloy arc-shaped plate are welded together by a vacuum electron beam to obtain a welded piece.

[0103] In this embodiment, the welding method in the foregoing step S206 is still used to weld the welded piece and the niobium-tungsten alloy arc-shaped plate.

[0104] S212: The spiral cylindrical structure and the at least one niobium-tungsten alloy arc-shaped plate welded together are vacuum heat-insulated.

[0105] The purpose of vacuum heat insulation is to avoid harmful processes such as air filling, weld oxidation, and hydrogen absorption, and the longer the heat insulation time is, the more beneficial it is. Here, the method is exactly the same as that in the foregoing step S206.

[0106] S213: Steps S208-S212 are repeated until a niobium-tungsten alloy long plate piece of a required length is obtained.

[0107] By repeating steps S208-S212, the length of the niobium-tungsten alloy long plate piece can be continuously lengthened until a niobium-tungsten alloy long plate piece of a required length is obtained.

[0108] S214: The welded piece is flattened to obtain a niobium-tungsten alloy long plate piece.

[0109] Optionally, step S214 can include:

[0110] 2141: straighten one end of the Nb-Ti alloy arc-shaped plate welded together.

[0111] 2142: send the straightened one end of the Nb-Ti alloy arc-shaped plate into the straightening machine until the Nb-Ti alloy arc-shaped plate welded together is straightened.

[0112] Referring to Figure 10 , the one end of the Nb-Ti alloy arc-shaped plate is straightened in advance, and then the straightened one end is sent into the straightening machine for straightening, so that the welded piece can be quickly flattened, and then the Nb-Ti alloy long plate piece is obtained.

[0113] In order to avoid the surface of the Nb-Ti alloy long plate piece from being crushed, when straightening, stainless steel protective plates are placed on the upper and lower surfaces of the Nb-Ti alloy arc-shaped plate, the stainless steel protective plates are moved while straightening, and after straightening, the straightness of the horizontal and vertical directions is ensured to be ≤3 / 1000.

[0114] Of course, the straightening method can also be other methods, for example, the two ends of the Nb-Ti alloy arc-shaped plate welded together are straightened, and then the surface of the Nb-Ti alloy arc-shaped plate welded together is flattened by a pressing roller.

[0115] The Nb-Ti alloy long plate piece manufactured by the above method can be used as a certain guide rail backing plate, and meets the length requirement of the guide rail backing plate. After the guide rail backing plate is tested, the guide rail backing plate has good compression resistance.

[0116] The above only describes optional embodiments of the present disclosure, and is not used to limit the present disclosure. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present disclosure shall be included in the protection scope of the present disclosure.

Claims

1. A method of processing a long piece of niobium-tungsten alloy, characterized by, The processing method comprises: providing a plurality of niobium-tungsten alloy flat plates; respectively rolling the plurality of niobium-tungsten alloy flat plates along the length direction of the niobium-tungsten alloy flat plates to obtain a plurality of niobium-tungsten alloy arc-shaped plates; splicing the plurality of niobium-tungsten alloy arc-shaped plates together, so that two adjacent niobium-tungsten alloy arc-shaped plates are located on the same circular arc, and clamping and fixing each niobium-tungsten alloy arc-shaped plate together; feeding the assembled niobium-tungsten alloy arc-shaped plates into a vacuum chamber, and sequentially welding corresponding to-be-welded surfaces of two adjacent niobium-tungsten alloy arc-shaped plates by a vacuum electron beam to obtain a welded piece, the to-be-welded surfaces being the side surfaces between the two adjacent niobium-tungsten alloy arc-shaped plates; winding the already-welded niobium-tungsten alloy arc-shaped plates around the center of a rotating platform as an axis, moving the niobium-tungsten alloy arc-shaped plates after winding towards the center of the rotating platform, so that the welded niobium-tungsten alloy arc-shaped plates form a spiral cylindrical structure with at least one layer, abutting at least one to-be-welded niobium-tungsten alloy arc-shaped plate on the spiral cylindrical structure, the to-be-welded niobium-tungsten alloy arc-shaped plate being located outside the niobium-tungsten alloy arc-shaped plates after winding, two adjacent to-be-welded niobium-tungsten alloy arc-shaped plates being located on the same circular arc, and clamping and fixing the at least one adjusted niobium-tungsten alloy arc-shaped plate and the spiral cylindrical structure together; welding the to-be-welded surfaces of two adjacent to-be-welded niobium-tungsten alloy arc-shaped plates by a vacuum electron beam to obtain a welded piece; flattening the welded piece to obtain a niobium-tungsten alloy long plate piece.

2. The method of claim 1 wherein, The rolling the plurality of niobium-tungsten alloy flat plates along the length direction of the niobium-tungsten alloy flat plates to obtain a plurality of niobium-tungsten alloy arc-shaped plates comprises: rolling the niobium-tungsten alloy flat plates by a plate rolling machine; correcting the rolled niobium-tungsten alloy flat plates by a sample arc-shaped piece, so that the outer arc surface of the sample arc-shaped piece is attached to the inner arc surface of the rolled niobium-tungsten alloy flat plates to obtain the niobium-tungsten alloy arc-shaped plates.

3. The method of claim 1 wherein, The clamping and fixing each niobium-tungsten alloy arc-shaped plate together comprises: fixing two adjacent niobium-tungsten alloy arc-shaped plates on a rotating platform by a clamping device, the clamping device comprising a base and two pressing plates, the base being connected to the rotating platform, the base having a first circular arc surface for being attached to the inner arc surface of the niobium-tungsten alloy arc-shaped plate, and the two pressing plates being spaced apart on the same side of the base and connected to the base, the pressing plate having a second circular arc surface opposite to the first circular arc surface and for being attached to the outer arc surface of the niobium-tungsten alloy arc-shaped plate.

4. The method of claim 1 wherein, The sequentially welding corresponding to-be-welded surfaces of two adjacent niobium-tungsten alloy arc-shaped plates by a vacuum electron beam to obtain a welded piece comprises: rotating the assembled niobium-tungsten alloy arc-shaped plates, and sequentially bombarding one of the to-be-welded surfaces of two adjacent niobium-tungsten alloy arc-shaped plates by an electron beam, so that the two adjacent niobium-tungsten alloy arc-shaped plates are welded together.

5. The method of claim 1 wherein, The method further comprises: The method further comprises:

6. The method of processing according to any one of claims 1 to 5, wherein, The method further comprises: The method further comprises:

7. The method of processing according to any one of claims 1 to 5, wherein, The method further comprises:

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