Heat preservation sheath device

Abstract

The invention provides a heat preservation sheath device, and relates to the technical field of material processing. The heat preservation wrapping sleeve device comprises a wrapping sleeve body, the wrapping sleeve body comprises a flexible heat preservation layer and a shape memory alloy wrapping layer, the flexible heat preservation layer is connected with the shape memory alloy wrapping layer, and the flexible heat preservation layer is laid on the surface of the shape memory alloy wrapping layer in parallel. And the shape memory alloy coating layer is used for recovering to a preset shape at a preset temperature so as to drive the flexible heat preservation layer to wrap the surface of the forge piece. The heat preservation wrapping device can solve the problems that a traditional heat preservation wrapping mode for forgings is large in labor intensity and inconvenient to operate by workers.

Description

Technical Field

[0001] The invention relates to the technical field of material processing, and in particular to a thermal insulation bag device. Background Art

[0002] The processing methods of nickel-based alloys include forging, extrusion, rolling, etc. Due to the narrow processing temperature range, the processing temperature needs to be strictly controlled. During the forging process, nickel-based alloys usually use three upsetting and three drawing or two upsetting and two drawing, and they must be returned to the furnace for insulation between each firing. After the heating is completed, due to the certain distance between the heating furnace and the hydraulic press, it needs to be transported by an overhead crane. This causes the steel billet to be completely exposed to the air during transportation, and the temperature drops rapidly, which will increase the deformation resistance. Cracks are prone to occur during the forging process, and mixed crystals are prone to occur at the edges, affecting product quality and subsequent processing.

[0003] In the related technology, the surface of the steel billet is usually insulated with thermal insulation asbestos felt or thermal insulation blanket. Specifically, the steel billet is directly covered with thermal insulation materials such as thermal insulation asbestos felt or thermal insulation blanket, so that the thermal insulation material covers the surface of the forging or steel billet to reduce the heat loss of the forging or steel billet due to radiation and convection. The traditional covering method is labor-intensive, and because the surface temperature of the steel billet generally reaches above 800℃, or even higher, it is inconvenient for workers to operate in a high temperature environment, and there are safety hazards. Summary of the invention

[0004] In order to solve the problem that the traditional insulation wrapping method for forgings is labor-intensive and inconvenient for workers to operate, the present invention provides an insulation wrapping device. The insulation wrapping device in the present invention adopts the following technical solutions:

[0005] A thermal insulation sheath device comprises a sheath body, wherein the sheath body comprises a flexible thermal insulation layer and a shape memory alloy coating layer, wherein the flexible thermal insulation layer is connected to the shape memory alloy coating layer, and the flexible thermal insulation layer is arranged parallel to the shape memory alloy coating layer;

[0006] The shape memory alloy coating layer is used to restore to its preset shape at a preset temperature to drive the flexible thermal insulation layer to wrap around the surface of the forging.

[0007] Optionally, the sheath body further includes a first bonding layer, and the first bonding layer is arranged on a side of the flexible thermal insulation layer away from the shape memory alloy coating layer.

[0008] Optionally, two sides of the shape memory alloy coating layer along the width direction are bent toward one side of the flexible thermal insulation layer to form a bent portion, and the upper end of the bent portion is flush with the surface of the flexible thermal insulation layer.

[0009] Optionally, the sheath body further comprises a fixing layer, wherein the fixing layer is disposed between the shape memory alloy sheathing layer and the flexible thermal insulation layer, and the fixing layer is used to fix the flexible thermal insulation layer to the shape memory alloy sheathing layer.

[0010] Optionally, the fixed layer is a wire mesh, the wire mesh is fixedly connected to the shape memory alloy coating layer, and the flexible thermal insulation layer is laid on the surface of the wire mesh and is detachably connected to the wire mesh.

[0011] Optionally, the two surfaces of the shape memory alloy coating are sequentially provided with the fixing layer and the flexible thermal insulation layer, each of the fixing layers is fixedly connected to the shape memory alloy coating, and each of the flexible thermal insulation layers is detachably connected to the corresponding fixing layer.

[0012] Optionally, the sheath body further comprises a shape memory polymer coating layer, and the shape memory polymer coating layer is arranged on a side of the flexible thermal insulation layer away from the shape memory alloy coating layer.

[0013] Optionally, the sheath body further includes a first adhesive layer and a second adhesive layer, wherein the first adhesive layer is arranged on a side of the shape memory polymer coating layer away from the flexible thermal insulation layer, and the second adhesive layer is arranged between the flexible thermal insulation layer and the shape memory polymer coating layer.

[0014] Optionally, the material of the first bonding layer includes one or more of boron glass powder, soda lime glass powder, silicate glass powder and phosphate glass powder.

[0015] Optionally, the thermal insulation wrapping device further comprises a clamping assembly, wherein the clamping assembly comprises a driving structure and a clamping member, wherein the clamping member is connected to the driving structure, and the driving structure is used to drive the clamping member to move toward the wrapped wrapping body to generate a clamping force on the wrapped wrapping body.

[0016] The beneficial effects of the present invention compared to the prior art are:

[0017] The present invention first heats the shape memory alloy coating to above the transformation temperature, bends the shape memory alloy, and forms a non-closed cylindrical surface. Then, the shape memory alloy coating is stretched into a plane at a low temperature, and a flexible insulation layer is laid parallel to one side surface of the shape memory coating. During the actual coating, the cylindrical forging can be transported to the surface of the flexible insulation layer by an overhead crane, so that the axial direction of the cylindrical forging is perpendicular to the length direction of the sheath body. Since the surface temperature of the forging is far higher than the transformation temperature of the shape memory alloy coating, part of the heat of the forging itself can be transferred to the shape memory alloy coating through direct contact or air, thereby heating the shape memory alloy coating. When the temperature of the shape memory alloy coating reaches above the transformation temperature, the shape memory alloy coating recovers its deformation under the action of the shape memory effect, bends again to form a non-closed cylindrical surface, and drives the flexible insulation layer to coat the forging together. Since the present invention realizes the sheathing of forgings through the shape memory effect of shape memory alloy, no manual sheathing action is required, which greatly reduces the labor intensity and the possibility of direct contact between workers and high-temperature forgings, thereby improving the operation safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of a heat preservation jacket device according to an exemplary embodiment of the present invention when the forging is not covered;

[0019] Figure 2 A schematic diagram of a heat preservation sheath device according to an exemplary embodiment of the present invention when the heat preservation sheath device is sheathing a forging;

[0020] Figure 3 It is a schematic structural diagram of a package body in an exemplary embodiment of the present invention;

[0021] Figure 4 It is a schematic diagram of the overall structure of a heat preservation bag device in an exemplary embodiment of the present invention;

[0022] Figure 5 This is a schematic diagram of the structure of the package body along the width direction in Example 1 of the present invention;

[0023] Figure 6 This is a schematic diagram of the structure of the package body along the width direction in Example 2 of the present invention;

[0024] Figure 7 This is a schematic diagram of the structure of the package body along the width direction in Example 3 of the present invention;

[0025] Figure 8 This is a surface micrograph of the forging in Example 1 of the present invention;

[0026] Fig. 9 This is a surface micrograph of the forging in Example 2 of the present invention;

[0027] Fig.10 This is a surface micrograph of the forging in Example 3 of the present invention;

[0028] Fig.11 This is a surface macroscopic image of the forging in Comparative Example 1 of the present invention;

[0029] Fig.12 This is a surface micrograph of the forging in Comparative Example 2 of the present invention;

[0030] Fig.13 This is a surface micrograph of the forging in Comparative Example 3 of the present invention;

[0031] Explanation of the reference numerals: 1. forging; 2. sheath body; 21. flexible insulation layer; 22. shape memory alloy coating layer; 221. bending portion; 23. fixing layer; 24. first bonding layer; 25. shape memory polymer coating layer; 26. second bonding layer; 3. mounting seat; 4. moving unit; 5. clamping assembly; 51. driving structure; 52. clamping member. DETAILED DESCRIPTION

[0032] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. Although certain embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be interpreted as being limited to the embodiments described herein. On the contrary, these embodiments are provided to provide a more thorough and complete understanding of the present invention. It should be understood that the drawings and embodiments of the present invention are only for exemplary purposes and are not intended to limit the scope of protection of the present invention.

[0033] The term "including" and its variations used in this document are open inclusions, that is, "including but not limited to"; the term "based on" means "based at least in part on"; the term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one other embodiment"; the term "some embodiments" means "at least some embodiments"; the term "optionally" means "optional embodiments". The relevant definitions of other terms will be given in the following description. It should be noted that the concepts of "first", "second", etc. mentioned in the present invention are only used to distinguish different devices, modules or units, and are not used to limit the order or interdependence of the functions performed by these devices, modules or units.

[0034] It should be noted that the modifications of "one" and "plurality" mentioned in the present invention are illustrative rather than restrictive, and those skilled in the art should understand that, unless otherwise clearly indicated in the context, it should be understood as "one or more".

[0035] Shape memory alloys are materials composed of two or more metal elements that have shape memory effects through thermoelasticity and martensitic phase transformation and its inversion. The shape memory alloy coating can be restored to its original state by heating to the transformation temperature after undergoing a certain deformation. At temperatures below the transformation temperature, the shape memory alloy is in a martensitic state, which is soft and can be deformed considerably by detwinning. Heating above the transformation temperature can restore the original deformation and transform the material into a high-strength austenitic state.

[0036] Figure 1 This is a schematic diagram of a thermal insulation jacket device provided by an exemplary embodiment of the present invention when the forging 1 is not covered. Figure 2 A schematic diagram of a heat-insulating jacket device provided in an exemplary embodiment of the present invention for wrapping a forging 1. The heat-insulating jacket device in the embodiment of the present invention is suitable for wrapping and insulating a cylindrical forging 1. In the figure, the heat-insulating jacket device includes a jacket body 2, which stretches into a planar structure at a relatively low temperature, absorbs the heat of the forging 1 when it is close to the forging 1, and returns to a curved shape when the transformation temperature is reached, forming a non-closed cylindrical curved surface and wrapping around the outer circumference of the cylindrical forging 1, thereby achieving heat insulation of the forging 1.

[0037] Figure 3 Schematic diagram of the specific structure of the package body 2 provided in the embodiment of the present invention. Figure 3 As shown, the sheath body 2 in the present invention includes a flexible insulation layer 21 and a shape memory alloy coating layer 22, the flexible insulation layer 21 is connected to the shape memory alloy coating layer 22, and the flexible insulation layer 21 is arranged parallel to the shape memory alloy coating layer 22. The shape memory alloy coating layer 22 is used to restore to its preset shape at a preset temperature to drive the flexible insulation layer 21 to wrap around the surface of the forging 1.

[0038] The present invention first heats the shape memory alloy coating 22 to above the transformation temperature, bends the shape memory alloy, and forms a non-closed cylindrical surface. Then, the shape memory alloy coating 22 is stretched into a plane at a low temperature, and the flexible insulation layer 21 is fixed to one side surface of the shape memory coating. During the actual coating, the cylindrical forging 1 can be transported to the surface of the flexible insulation layer 21 by a crane, so that the axial direction of the cylindrical forging is perpendicular to the length direction of the sheath body 2. Since the surface temperature of the forging 1 is far higher than the transformation temperature of the shape memory alloy coating 22, part of the heat of the forging 1 itself can be transferred to the shape memory alloy coating 22 through direct contact or air, thereby heating the shape memory alloy coating 22. When the temperature of the shape memory alloy coating 22 reaches above the transformation temperature, the shape memory alloy coating 22 recovers its deformation under the action of the shape memory effect, bends again to form a non-closed cylindrical surface, and drives the flexible insulation layer 21 to coat the forging 1 together. Since the present invention realizes the sheathing of the forging 1 by the shape memory effect of the shape memory alloy, no manual sheathing action is required, which greatly reduces the labor intensity and the possibility of direct contact between the workers and the high-temperature forging 1, thereby improving the operation safety.

[0039] Optionally, the material of the shape memory alloy coating 22 in the embodiment of the present invention can be any one of nickel-titanium alloy, copper-based alloy and iron-based alloy with shape memory effect, such as Ni-Ti-Cu, Ni-Ti-Co, Ni-Ti-Fe, Ni-Ti-Nb, Cu-Zn, Cu-Zn-Al, Fe-Pt, Fe-Mn-Si, etc. Taking nickel-titanium alloy as an example, the transformation temperature of nickel-titanium alloy is about 50°C to 100°C. The flexible insulation layer 21 can be any one of asbestos felt, glass wool and thermal insulation blanket. The flexible insulation layer 21 can be fixed to the shape memory alloy coating 22 by bolts, nuts, rivets, etc.

[0040] Optionally, refer to Figure 3 As shown, the sheath body 2 further includes a fixing layer 23, which is disposed between the shape memory alloy coating layer 22 and the flexible insulation layer 21, and is used to fix the flexible insulation layer 21 to the shape memory alloy coating layer 22. Specifically, the fixing layer 23 can be a wire mesh, which is fixedly connected to the shape memory alloy coating layer 22, and the flexible insulation layer 21 is laid on the surface of the wire mesh and is detachably connected to the wire mesh.

[0041] Specifically, the wire mesh can be connected to the shape memory alloy coating layer 22 through a welding point, and the flexible insulation layer 21 and the wire mesh can be fixed by a fixed wire. The fixing process of the flexible insulation layer 21 and the wire mesh is as follows: the flexible insulation layer 21 is laid on the wire mesh, and then the fixed wire is inserted into the flexible insulation layer 21 from top to bottom, and then passes through the wire mesh below, and then goes around a circle and passes through the wire mesh, and passes through the flexible insulation layer 21 again, and finally tightens the two ends of the wire. Furthermore, a plurality of fixed wires can be arranged at intervals along the length direction of the flexible insulation layer 21 for fixing to achieve a better fixing effect.

[0042] In the embodiment of the present invention, since the material of the flexible thermal insulation layer 21 is relatively soft and is prone to displacement or bending during the coating process, the present invention uses wire mesh as the fixed layer 23, which can not only tightly connect the flexible thermal insulation layer 21 with the shape memory alloy coating layer 22, but also use the wire mesh as a skeleton to drive the flexible asbestos layer to coat the forging 1 in a circumferential direction.

[0043] In some optional embodiments, referring to Figure 3 As shown, the sheath body 2 further includes a first bonding layer 24, which is disposed on the side of the flexible insulation layer 21 away from the shape memory alloy coating layer 22. Specifically, the material of the first bonding layer 24 can be one or more of boron glass powder, sodium oxide calcium glass powder, silicate glass powder and phosphate glass powder, or a new generation of low melting point glass powder D40, D45, D50, D58, D70 and D75, etc. Glass powder is a white powdery super weather-resistant powder material, which can play a good bonding role after melting, so that the sheath body 2 can be more firmly coated on the forging 1.

[0044] In some optional embodiments, referring to Figure 4 As shown, the heat preservation bag device may further include a mounting seat 3 and a moving unit 4, wherein the bag body 2 is arranged on the mounting seat 3, and the moving unit 4 is arranged at the bottom of the mounting seat 3, and is used to drive the mounting seat 3 and the bag body 2 to move, and the moving unit 4 may adopt any moving structure in the prior art, such as a universal wheel. The mounting seat 3 is driven to move by the moving unit 4, so that the bag body 2 is close to the forging 1, which is suitable for heat preservation of large forgings 1 that are inconvenient to move.

[0045] Further, in some optional embodiments, referring to Figure 4 As shown, the heat preservation jacket device may further include a clamping assembly 5, which is disposed on the mounting seat 3. The clamping assembly 5 is used to provide a clamping force to the jacket body 2 after the jacket body 2 has jacketed the forging 1, so that the jacket body 2 and the forging 1 are closely fitted. The clamping assembly 5 may adopt any one of the prior arts. As an example, the present invention describes one of the implementations:

[0046] Reference Figure 4 As shown, in some optional embodiments, the clamping assembly 5 includes a driving structure 51 and a clamping member 52, the clamping member 52 is connected to the driving structure 51, and the driving structure 51 is used to drive the clamping member 52 to move toward the wrapped sheath body 2 to generate a clamping force on the wrapped sheath body 2. Specifically, after the sheath body 2 covers the forging 1, the clamping member 52 can move toward the joint at both ends of the sheath body 2 under the drive of the driving structure 51, so that the two ends of the sheath body 2 are tightly fitted with the forging 1. Among them, the clamping member 52 can be specifically in an arc shape that matches the outer peripheral surface of the forging 1, so that it can fit tightly with the deformed sheath body 2 to improve the clamping force, and at the same time, it can further enclose the gap between the two ends of the sheath body 2, reducing the heat of the forging 1 from the gap between the two ends of the sheath body 2 to the air. The driving structure 51 can adopt any one of the existing technologies, such as a driving motor and a screw. Furthermore, the number of clamping assemblies 5 can be multiple groups, and the multiple groups of clamping assemblies 5 are distributed axially at intervals along the forging 1. In order to improve the stability of the clamping process, each clamping member 52 can be correspondingly provided with two groups of driving structures 51, and the two ends of the clamping member 52 are respectively connected to the corresponding driving structures 51.

[0047] In some other embodiments, the heat preservation package device may further include a lifting mechanism (not shown) for driving the mounting seat 3 to move in the vertical direction, and the lifting mechanism may also adopt any implementation method in the prior art. The lifting mechanism can further improve the flexibility of adjusting the position of the mounting seat 3, and facilitate the heat preservation package operation of the forgings 1 at different positions and heights.

[0048] Furthermore, in order to improve the heat preservation effect, the specific structure of the sheath body 2 in the present invention may also include the following specific implementations:

[0049] Example 1

[0050] Reference Figure 5 As shown, the sheath body 2 of this embodiment includes a shape memory alloy coating layer 22, a fixed layer 23, a flexible insulation layer 21 and a first bonding layer 24 which are arranged in sequence. Among them, the material of the shape memory alloy coating layer 22 is nickel-titanium alloy, the fixed layer 23 is a wire mesh, the flexible insulation layer 21 is asbestos felt, and the material of the first bonding layer 24 is low-melting-point glass powder D40. The wire mesh and the shape memory alloy coating layer 22 are connected by welding points, the asbestos felt is laid on the surface of the wire mesh, and is detachably connected by fixing the wire, and finally the low-melting-point glass powder D40 is spread on the surface of the asbestos felt so that the asbestos felt can be tightly bonded to the forging 1.

[0051] Further, see Figure 5As shown, in this embodiment, the shape memory alloy coating layer 22 is bent along both sides of the width direction toward one side of the flexible thermal insulation layer 21 to form a bent portion 221 , and the upper end of the bent portion 221 is flush with the surface of the flexible thermal insulation layer 21 .

[0052] In the actual coating process, since the forging 1 is in direct contact with the flexible insulation layer 21, and the flexible insulation layer 21 has a certain insulation effect, it takes a while for the heat of the forging 1 to heat the shape memory alloy coating 22 to its transformation temperature. In the embodiment of the present invention, the shape memory alloy coating 22 is bent along the width direction of both sides toward one side of the flexible insulation layer 21 to form a bending portion 221. In this way, when the forging 1 is placed on the surface of the flexible insulation layer 21, the bending portion 221 of the shape memory alloy coating 22 can directly contact the forging 1, and further transfer the heat of the forging 1 to other parts, which is more conducive to the shape memory alloy coating 22 directly absorbing the heat of the forging 1, so as to quickly heat to its transformation temperature and deform.

[0053] The heat preservation bag device in this embodiment is used to keep the forgings of IN617mod alloy after homogenization heat treatment and blanking forging. Specifically, the following steps are included:

[0054] S1: After the forgings are heated and kept warm, they are taken out, covered, and then returned to the furnace for a short period of reheating.

[0055] S2: Forgings with insulation measures are taken out of the furnace for forging.

[0056] S3: After forging, the forging is re-wrapped.

[0057] S4: After the forging is wrapped, it is returned to the furnace for heating and insulation.

[0058] After forging, the surface quality of the forging is observed after the forging cools down. The microscopic image of the forging surface in this embodiment is as follows: Figure 8 As shown in the figure, the surface quality of the forging is good, with fewer cracks. After dissection of the forging, it was found that the grain structure at the edge is uniform.

[0059] Example 2

[0060] Reference Figure 6 As shown, in this embodiment, on the basis of embodiment 1, the two surfaces of the shape memory alloy coating layer 22 are sequentially provided with a fixed layer 23 and a flexible thermal insulation layer 21, each fixed layer 23 is fixedly connected to the shape memory alloy coating layer 22, and each flexible thermal insulation layer 21 is detachably connected to the corresponding fixed layer 23. That is, in this embodiment, a fixed layer 23 and a flexible thermal insulation layer 21 are also sequentially provided on the other surface of the shape memory alloy coating layer 22. In this embodiment, the specific connection mode between the fixed layer 23 and the shape memory alloy coating layer 22, and between the fixed layer 23 and the flexible thermal insulation layer 21 is the same as that in embodiment 1.

[0061] In this embodiment, a shape memory alloy coating layer 22 is used to drive two flexible insulation layers 21 to bend and deform. By arranging two flexible insulation layers 21 in one sheath body 2, the insulation performance of the sheath body 2 is further improved.

[0062] The heat preservation bag device in this embodiment is used to keep the forgings of IN706 alloy after homogenization heat treatment and blank forging. Specifically, the following steps are included:

[0063] S1: After the forgings are heated and kept warm, they are taken out, covered, and then returned to the furnace for a short period of reheating.

[0064] S2: Forgings with insulation measures are taken out of the furnace for forging.

[0065] S3: After forging, the forging is re-wrapped.

[0066] S4: After the forging is wrapped, it is returned to the furnace for heating and insulation.

[0067] After forging, the surface quality of the forging is observed after the forging cools down. The microscopic image of the forging surface in this embodiment is as follows: Fig. 9 As shown in the figure, the surface quality of the forging is good, with fewer cracks. After dissection of the forging, it was found that the grain structure at the edge is uniform.

[0068] Example 3

[0069] Reference Figure 7 As shown, the sheath body 2 in this embodiment further includes a shape memory polymer coating layer 25, which is disposed on a side of the flexible thermal insulation layer 21 away from the shape memory alloy coating layer 22. In this embodiment, the first bonding layer 24 is disposed on a side of the shape memory polymer coating layer 25 away from the flexible thermal insulation layer 21, and a second bonding layer 26 is further disposed between the flexible thermal insulation layer 21 and the shape memory polymer coating layer 25.

[0070] Therefore, if Figure 7As shown, the sheath body 2 in this embodiment includes a shape memory alloy coating layer 22, a fixed layer 23, a flexible insulation layer 21, a second bonding layer 26, a shape memory polymer coating layer 25 and a first bonding layer 24, which are arranged in sequence from the outside to the inside. Among them, the material of the shape memory alloy coating layer 22 is nickel-titanium alloy, the fixed layer 23 is a wire mesh, the flexible insulation layer 21 is asbestos felt, the material of the shape memory polymer coating layer 25 is a high-temperature resistant shape memory epoxy resin, the material of the first bonding layer 24 is a low-melting point glass powder D40, and the material of the second bonding layer 26 is a high-temperature resistant inorganic glue. Similar to Example 1, the wire mesh is connected to the shape memory alloy coating layer 22 through a welding point, the asbestos felt is laid on the surface of the wire mesh, and is detachably connected by a fixed iron wire. In this embodiment, the low-melting point glass powder D40 is specifically spread on the surface of the shape memory polymer coating layer 25 so that the shape memory polymer can be tightly bonded to the forging 1.

[0071] In this embodiment, a shape memory alloy coating layer 22 and a shape memory polymer coating layer 25 are respectively provided on both sides of the flexible thermal insulation layer 21. During the actual coating, the forging 1 is not in direct contact with the flexible thermal insulation layer 21, and the shape memory polymer coating layer 25 first contacts the forging 1 and absorbs the heat on the surface of the forging 1. When the temperature of the shape memory polymer coating layer 25 reaches its transition temperature, the shape memory polymer coating layer 25 first bends and deforms, and then drives the flexible thermal insulation layer 21 and the shape memory alloy coating layer 22 to bend and deform together, thereby achieving coating of the forging 1.

[0072] In this embodiment, the heat of the forging 1 is directly transferred through the shape memory polymer coating layer 25 in sequence, further improving the deformation efficiency of the sheath body 2. In addition, since the flexible thermal insulation layer 21 is not in direct contact with the forging 1, the phenomenon of the flexible thermal insulation layer 21 falling off due to direct contact with the high-temperature forging 1 is avoided, and the service life of the flexible thermal insulation layer 21 is extended.

[0073] The heat preservation bag device in this embodiment is used to keep the forgings of IN718 alloy after homogenization heat treatment and blanking forging. Specifically, the following steps are included:

[0074] S1: After the forgings are heated and kept warm, they are taken out, covered, and then returned to the furnace for a short period of reheating.

[0075] S2: Forgings with insulation measures are taken out of the furnace for forging.

[0076] S3: After forging, the forging is re-wrapped.

[0077] S4: After the forging is wrapped, it is returned to the furnace for heating and insulation.

[0078] After forging, the surface quality of the forging is observed after the forging cools down. The microscopic image of the forging surface in this embodiment is as follows: Fig.10As shown in the figure, the surface quality of the forging is good, with fewer cracks. After dissection of the forging, it was found that the grain structure at the edge is uniform.

[0079] Comparative Example 1

[0080] After the forgings of IN617mod alloy have been subjected to homogenization heat treatment and blanking forging, they are taken out after being heated and kept warm, and then forged. After forging, they are returned to the furnace for heating and keeping warm. No jacketing is used in each forging process.

[0081] Comparative Example 2

[0082] After the forgings of IN706mod alloy are subjected to homogenization heat treatment and blank forging, they are taken out after being heated and kept warm, and then forged. After forging, they are returned to the furnace for heating and keeping warm. No jacket is used in each forging process.

[0083] Comparative Example 3

[0084] After the forgings of IN718mod alloy are subjected to homogenization heat treatment and blanking forging, they are taken out after being heated and kept warm, and then forged. After forging, they are returned to the furnace for heating and keeping warm. No jacket is used in each forging process.

[0085] The surface quality of the forgings in Comparative Examples 1-3 is shown in FIG. Figure 11-13 As shown in the figure, it can be found that after the forging is completed, the surface quality of the forging is observed after it has cooled down, and it is found that there are many cracks on the surface of the forging. After the forging is dissected, it is found that the edge part has serious mixed crystal phenomenon.

[0086] Although the present invention is disclosed as above, the protection scope of the present invention is not limited thereto. Those skilled in the art may make various changes and modifications without departing from the spirit and scope of the present invention, and these changes and modifications will fall within the protection scope of the present invention.

Claims

1. A thermal insulation bag device, characterized in that: The invention comprises a sheath body (2), wherein the sheath body (2) comprises a flexible thermal insulation layer (21) and a shape memory alloy coating layer (22), wherein the flexible thermal insulation layer (21) is connected to the shape memory alloy coating layer (22), and the flexible thermal insulation layer (21) is arranged parallel to the shape memory alloy coating layer (22); The shape memory alloy coating layer (22) is used to restore to its preset shape at a preset temperature, so as to drive the flexible thermal insulation layer (21) to wrap around the surface of the forging.

2. The thermal insulation bag device according to claim 1, characterized in that: The sheath body (2) further comprises a first bonding layer (24), wherein the first bonding layer (24) is arranged on a side of the flexible thermal insulation layer (21) away from the shape memory alloy coating layer (22).

3. The thermal insulation bag device according to claim 1, characterized in that: The shape memory alloy coating layer (22) is bent along both sides of the width direction toward one side of the flexible thermal insulation layer (21) to form a bent portion (221), and the upper end of the bent portion (221) is flush with the surface of the flexible thermal insulation layer (21).

4. The thermal insulation bag device according to claim 1, characterized in that: The sheath body (2) further comprises a fixing layer (23), wherein the fixing layer (23) is arranged between the shape memory alloy coating layer (22) and the flexible thermal insulation layer (21), and the fixing layer (23) is used to fix the flexible thermal insulation layer (21) to the shape memory alloy coating layer (22).

5. The thermal insulation bag device according to claim 4, characterized in that: The fixed layer (23) is a wire mesh, the wire mesh is fixedly connected to the shape memory alloy coating layer (22), and the flexible thermal insulation layer (21) is laid on the surface of the wire mesh and is detachably connected to the wire mesh.

6. The thermal insulation bag device according to claim 5, characterized in that: The two surfaces of the shape memory alloy coating layer (22) are sequentially provided with the fixing layer (23) and the flexible thermal insulation layer (21); each of the fixing layers (23) is fixedly connected to the shape memory alloy coating layer (22); and each of the flexible thermal insulation layers (21) is detachably connected to the corresponding fixing layer (23).

7. The thermal insulation bag device according to claim 1, characterized in that: The sheath body (2) further comprises a shape memory polymer coating layer (25), wherein the shape memory polymer coating layer (25) is arranged on a side of the flexible thermal insulation layer (21) away from the shape memory alloy coating layer (22).

8. The thermal insulation bag device according to claim 7, characterized in that: The sheath body (2) further comprises a first adhesive layer (24) and a second adhesive layer (26), wherein the first adhesive layer (24) is arranged on a side of the shape memory polymer coating layer (25) away from the flexible thermal insulation layer (21), and the second adhesive layer (26) is arranged between the flexible thermal insulation layer (21) and the shape memory polymer coating layer (25).

9. The thermal insulation bag device according to claim 2 or 8, characterized in that: The material of the first bonding layer (24) includes one or more of boron glass powder, soda lime glass powder, silicate glass powder and phosphate glass powder.

10. The thermal insulation bag device according to claim 1, characterized in that: The invention also comprises a clamping assembly (5), wherein the clamping assembly (5) comprises a driving structure (51) and a clamping member (52), wherein the clamping member (52) is connected to the driving structure (51), and the driving structure (51) is used to drive the clamping member (52) to move toward the sheath body (2) in a sheathed shape, so as to generate a clamping force on the sheath body (2).

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