Vacuum heat treatment tool

Abstract

The vacuum heat treatment tool comprises a stand column, annular frames, erecting rod sets and limiting rod sets, the stand column and the annular frames located at the upper end and the lower end of the stand column are combined to form a closed frame structure, and the erecting rod sets and the limiting rod sets are arranged on the portions, located at the upper end of the stand column and between the upper end and the lower end of the stand column, of the annular frame. The erecting rod set and the limiting rod set form a net-shaped structure, the high-temperature alloy blades are hung in the frame structure through the net-shaped structure, the erecting rod set enables the high-temperature alloy blades not to move in the direction perpendicular to the erecting rods, the limiting rods enable the high-temperature alloy blades not to move in the length direction of the erecting rods, and therefore the high-temperature alloy blades are prevented from making contact with one another. Or the high-temperature alloy blade is in contact with the frame structure to generate diffusion adhesion at high temperature, so that the rejection rate of the high-temperature alloy blade is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of high-temperature alloy blade manufacturing, and in particular to a vacuum heat treatment tool. Background Art

[0002] High-temperature alloys refer to metal materials that can work for a long time at temperatures above 600°C and under certain stresses. They have excellent high-temperature strength, good oxidation resistance and thermal corrosion resistance, good fatigue performance, fracture toughness and other comprehensive properties. In the field of aviation technology, high-temperature alloys are used to manufacture high-temperature alloy blades for aircraft engines and gas turbines.

[0003] High-temperature alloy blades must be vacuum heat treated before use, and the vacuum heat treatment temperature of high-temperature alloy blades is as high as 1300°C or above. During the vacuum heat treatment process, the blades are isolated from each other by tooling to ensure that the blades do not touch or collide with each other. However, if the high-temperature alloy blades are in direct contact with the tooling during the vacuum heat treatment process, it is easy for a diffusion reaction to occur between the high-temperature alloy blades and the tooling, damaging the blade surface and causing the high-temperature alloy blades to be scrapped.

[0004] Therefore, how to prevent the diffusion reaction between the high-temperature alloy blades and the tooling to reduce the scrap rate of the high-temperature alloy blades has become a technical problem that needs to be urgently solved by technical personnel in this field. Summary of the invention

[0005] The present application proposes a vacuum heat treatment tooling to prevent diffusion reaction between high-temperature alloy blades and the tooling, so as to reduce the scrap rate of high-temperature alloy blades.

[0006] In order to achieve the above-mentioned purpose, the present application provides a vacuum heat treatment tool, including a column and an annular frame.

[0007] The columns are arranged along the circumference of the annular frame, and the columns are perpendicular to the plane where the annular frame is located.

[0008] The annular frames are disposed at both the upper and lower ends of the column, at least one annular frame is disposed at a position between the upper and lower ends of the column, and the distance between two adjacent annular frames is greater than the length of the high-temperature alloy blade;

[0009] The annular frame has a setting rod group and a limiting rod group.

[0010] The erection rod group has two erection rods arranged in parallel, the high temperature alloy blade is located between the two erection rods, the edge plate of the high temperature alloy blade is erected on the erection rods, a plurality of erection rod groups are arranged side by side, and the erection rod groups are connected to the annular frame located at the upper end of the column and / or between the upper end and the lower end of the column;

[0011] The limiting rod group has two limiting rods arranged in parallel, the high temperature alloy blade is located between the two limiting rods, the limiting rod group is used to limit the high temperature alloy blade along the length direction perpendicular to the limiting rods, a plurality of limiting rod groups are arranged side by side along the length direction of the erection rod, the limiting rod group is connected to the erection rod group or the limiting rod group and the erection rod group are connected to the same annular frame,

[0012] The erection rod and the limiting rod are corundum ceramic rods.

[0013] Preferably, in the above-mentioned vacuum heat treatment tooling, the annular frame has a plug hole, and the annular frame and the erection rod are plug-connected via the plug hole.

[0014] Preferably, in the above-mentioned vacuum heat treatment tooling, the annular frame also includes a reinforcing rod parallel to the erection rod and the limiting rod, which is used to enhance the strength of the annular frame. The reinforcing rod is connected to the annular frame, and the reinforcing rod divides the annular frame into a plurality of small frames, in which the erection rod group and the limiting rod group are arranged.

[0015] Preferably, in the above vacuum heat treatment tooling, the reinforcing rod and the annular frame are made of the same material.

[0016] Preferably, in the above vacuum heat treatment tooling, the cross-sectional shape of the reinforcing rod is the same as the cross-sectional shape of the rod used to constitute the annular frame.

[0017] Preferably, in the above-mentioned vacuum heat treatment tooling, the column is a molybdenum column, the annular frame is a molybdenum frame, and the reinforcing rod is a molybdenum rod.

[0018] Preferably, in the above vacuum heat treatment tooling, the annular frame is a rectangular frame, and the columns are located at right angles to the annular frame and in the middle of the sides of the annular frame.

[0019] Preferably, in the above-mentioned vacuum heat treatment tooling, the erection rod is located above the limiting rod.

[0020] The vacuum heat treatment tooling provided in the embodiment of the present application includes a column, an annular frame, a mounting rod group and a limiting rod group. The column and the annular frame located at the upper end and the lower end of the column are combined to form a closed frame structure. The mounting rod group and the limiting rod group are arranged on the annular frame located at the upper end of the column and the part between the upper end and the lower end of the column. The mounting rod group and the limiting rod group form a mesh structure. The high-temperature alloy blades are suspended in the frame structure through the mesh structure. The mounting rod group prevents the high-temperature alloy blades from moving in a direction perpendicular to the mounting rods. The limiting rod prevents the high-temperature alloy blades from moving along the length direction of the mounting rods, so as to avoid the high-temperature alloy blades from contacting with each other or contacting with the frame structure and causing diffusion and adhesion at high temperature, thereby reducing the scrap rate of the high-temperature alloy blades. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some examples or embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without creative work, and the present application can also be applied to other similar scenarios based on the provided drawings. Unless it is obvious from the language environment or otherwise explained, the same reference numerals in the figures represent the same structure or operation.

[0022] Figure 1 It is a schematic diagram of the structure of the vacuum heat treatment tooling of the present application;

[0023] Figure 2 It is a front structural schematic diagram of the high-temperature alloy blade of the present application in cooperation with the erection rod and the limit rod;

[0024] Figure 3 It is a side structural schematic diagram of the high-temperature alloy blade of the present application in cooperation with the erection rod and the limit rod.

[0025] The accompanying drawings are as follows:

[0026] 1-column; 2-annular frame; 3-erection rod; 4-limiting rod; 5-high-temperature alloy blade; 6-reinforcement rod. DETAILED DESCRIPTION

[0027] The present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It will be understood that the specific embodiments described herein are only used to explain the related application, rather than to limit the application. The described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present application.

[0028] It should be noted that, for ease of description, only the parts related to the relevant applications are shown in the accompanying drawings. In the absence of conflict, the embodiments in this application and the features in the embodiments can be arbitrarily combined with each other, as long as the combined technical features are not contradictory. All feasible feature combinations are technical contents clearly recorded in this article. Any of the multiple sub-features contained in the same sentence can be applied independently, and does not have to be applied together with other sub-features.

[0029] As shown in this application and claims, unless the context clearly indicates an exception, the words "a", "an", "a kind" and / or "the" do not refer to the singular, but also include the plural. Generally speaking, the terms "include" and "comprise" only indicate the inclusion of clearly identified steps and elements, and these steps and elements do not constitute an exclusive list. The method or device may also include other steps or elements. The elements defined by the sentence "includes a..." do not exclude the existence of other identical elements in the process, method, commodity or device that includes the elements.

[0030] In the description of the embodiments of the present application, unless otherwise specified, " / " means or, for example, A / B can mean A or B; "and / or" in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships, for example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, in the description of the embodiments of the present application, "multiple" means two or more than two.

[0031] See also Figure 1-Figure 3 .

[0032] Some embodiments of the present application disclose a vacuum heat treatment tool, including a column 1 and an annular frame 2.

[0033] There are multiple columns 1, which are arranged along the circumference of the annular frame 2. The columns 1 are perpendicular to the plane where the annular frame 2 is located. The columns 1 are arranged along the vertical direction, and the two ends of the column 1 in the length direction are the upper end and the lower end of the column 1 respectively.

[0034] The upper and lower ends of the column 1 are both provided with an annular frame 2, and the column 1 and the annular frame 2 located at the upper and lower ends of the column 1 are combined to form a closed frame structure to ensure the stability of the vacuum heat treatment tooling. Figure 1 As shown, at least one annular frame 2 is provided between the upper end and the lower end of the column 1 to further enhance the stability of the frame structure.

[0035] The annular frame 2 of the vacuum heat treatment tooling disclosed in the present scheme comprises a setting rod group and a limiting rod group, wherein the setting rod group is used to set the high-temperature alloy blades 5, and the limiting rod group is used to limit the high-temperature alloy blades 5 set on the setting rod group to prevent the high-temperature alloy blades 5 from sliding relative to the setting rod group, thereby ensuring that two adjacent high-temperature alloy blades 5 do not contact or collide with each other.

[0036] like Figure 1 and Figure 2 As shown, the erection rod group has two erection rods 3 arranged in parallel, the high temperature alloy blade 5 is located between the two erection rods 3, the edge plate of the high temperature alloy blade 5 is erected on the erection rod 3, and the high temperature alloy blade 5 is suspended on the erection rod group. There are multiple erection rod groups, and multiple erection rod groups are arranged side by side. In order to ensure the distance between the high temperature alloy blades 5 of adjacent erection rod groups, the high temperature alloy blades 5 are not erected between adjacent erection rod groups.

[0037] like Figure 1 and Figure 3 As shown, the limiting rod group has two limiting rods 4 arranged in parallel, and the high temperature alloy blade 5 is located between two adjacent limiting rods 4. The limiting rods 4 located on both sides of the high temperature alloy blade 5 are used to limit the high temperature alloy blade 5 along the length direction of the erection rod 3. There are multiple limiting rod groups, and multiple limiting rod groups are arranged side by side along the length direction of the erection rod 3. The limiting rod group is connected to the erection rod group, or the limiting rod group and the erection rod group are connected to the same annular frame 2 to achieve the fixation of the position of the limiting rod group. The number of limiting rod groups is equal to the number of high temperature alloy blades 5 set on a single erection rod group, so that each high temperature alloy blade 5 can play a limiting role.

[0038] The erection rod group can be connected to the annular frame 2 located at the upper end of the column 1, and / or the erection rod group is connected to the annular frame 2 located between the upper and lower ends of the column 1; the limiting rod group is connected to the erection rod group, or the limiting rod group and the erection rod group are connected to the same annular frame 2 to fix the position of the limiting rod group.

[0039] The erection rod group and the limit rod group cooperate to form a Figure 1 The mesh structure shown enables the vacuum heat treatment tooling disclosed in this solution to perform vacuum heat treatment on multiple high-temperature alloy blades 5 at the same time.

[0040] When the erection rod group is connected to the upper end of the column 1 and the part between the upper end and the lower end of the column 1, the vacuum heat treatment tooling has a multi-layer mesh structure composed of the erection rod group and the limit rod group. Each layer of the mesh structure can be used to hang the high-temperature alloy blade 5, which increases the furnace loading capacity and improves the processing efficiency.

[0041] Preferably, the shape of the annular frame 2 is adapted to the shape of the furnace of the vacuum heat treatment furnace, so that the frame structure composed of the annular frame 2 and the column 1 can fully utilize the space of the furnace, increase the number of high-temperature alloy blades 5 that are heat treated in a single vacuum heat treatment furnace, and improve the efficiency of vacuum heat treatment.

[0042] The vacuum heat treatment tooling disclosed in the present scheme forms a frame structure through a column 1 and an annular frame 2, and a set of erecting rods and a set of limiting rods are arranged on the annular frame 2 located at the upper end of the column 1 and / or between the upper end and the lower end of the column 1, so as to form a multi-layer mesh structure composed of the erecting rods and the limiting rods in the frame structure, and the high-temperature alloy blades 5 are suspended in the frame structure through the mesh structure. There is a certain distance between adjacent erecting rods to prevent the high-temperature alloy blades 5 located between adjacent erecting rods from contacting or colliding with each other, and at the same time, the high-temperature alloy blades 5 located on the same erecting rod group are limited by the limiting rod group to prevent two adjacent high-temperature alloy blades 5 located on the same erecting rod group from contacting or colliding with each other.

[0043] In this solution, the frame structure is formed by the column 1 and the annular frame 2, which reduces the area of ​​the physical structure of the vacuum heat treatment tooling and reduces the risk of contact or collision between the high-temperature alloy blades 5 and the vacuum heat treatment tooling. At the same time, the high-temperature alloy blades 5 are erected and limited by a mesh structure composed of a erection rod group and a limiting rod group. The high-temperature alloy blades 5 are located in the frame structure and will not contact or collide with the vacuum heat treatment tooling, thereby reducing the risk of diffusion reaction between the high-temperature alloy blades 5 and the tooling due to contact or collision between the high-temperature alloy blades 5 and the vacuum heat treatment tooling, and reducing the scrap rate of the high-temperature alloy blades 5.

[0044] In this solution, the blades are erected and fixed by means of a mesh structure composed of an erection rod group and a limit rod group, thereby ensuring that the high-temperature alloy blades 5 do not move during the cooling process. The high-temperature alloy blades 5 are suspended to prevent deformation of the blades.

[0045] In some embodiments, the annular frame 2 is plug-connected to the erection rod 3 . Specifically, the annular frame 2 has an insertion hole, and the erection rod 3 is plug-connected to the annular frame 2 via the insertion hole.

[0046] In some embodiments, the annular frame 2 is connected to the erection rod 3 by snapping. Specifically, the end of the erection rod 3 has a snap groove, and the erection rod 3 is snapped onto the annular frame 2 through the snap groove.

[0047] The annular frame 2 and the erection rod 3 are connected by plugging or snapping, and no other connecting parts are introduced, which not only reduces the connection cost of the annular frame 2 and the erection rod 3, but also avoids the unstable factors caused by the introduction of connecting parts.

[0048] The limiting rod 4 can be connected to the annular frame 2 or to the erecting rod 3 .

[0049] In the embodiment where the limiting rod 4 is connected to the annular frame 2 , the connection method of the limiting rod 4 and the annular frame 2 may be the same as the connection method of the annular frame 2 and the erection rod 3 .

[0050] In the embodiment in which the limiting rod 4 is connected to the erection rod 3, the limiting rod 4 and the erection rod 3 can be plug-in connected, specifically, a plug hole is provided on the erection rod 3, and the limiting rod 4 is plug-in connected to the erection rod 3 through the plug hole, or the limiting rod 4 and the erection rod 3 are connected by snap-fitting, specifically, a slot is provided at the end of the limiting rod 4, and the limiting rod 4 is connected to the erection rod 3 through the slot.

[0051] In order to further optimize the above technical scheme, the annular frame 2 of the vacuum heat treatment tooling disclosed in this scheme also includes reinforcing rods 6. There are two types of reinforcing rods 6, one is parallel to the erection rod 3, and the other is parallel to the limiting rod 4. The reinforcing rods 6 are used to enhance the strength of the vacuum heat treatment tooling. The reinforcing rods 6 are connected to the annular frame 2.

[0052] like Figure 1 As shown, the reinforcing rods 6 divide an annular frame 2 into a plurality of small frames, and a limiting rod group and a setting rod group are arranged in each small frame.

[0053] The reinforcing rod 6 can share the load borne by the annular frame 2 , and on the basis of improving the vacuum heat treatment tooling, increase the number of high-temperature alloy blades 5 that can be placed on the vacuum heat treatment tooling.

[0054] Preferably, the reinforcing rod 6 is made of the same material as the annular frame 2. The reinforcing rod 6 is also a part of the frame structure. The reinforcing rod 6 and the annular frame 2 are made of the same material, which can ensure that the internal and external strengths of the frame structure are equal.

[0055] The reinforcing rod 6 and the annular frame 2 may also be made of different materials.

[0056] Preferably, the cross-sectional shape of the reinforcing rod 6 is the same as the cross-sectional shape of the rod used to constitute the annular frame 2 .

[0057] Preferably, the annular frame 2 and the column 1 are made of the same material.

[0058] In the embodiment where the reinforcing rod 6, the annular frame 2 and the column 1 are made of the same material, the column 1 is a molybdenum column, the annular frame 2 is a molybdenum frame, and the reinforcing rod 6 is a molybdenum rod. The vacuum heat treatment tooling disclosed in this scheme uses a pure molybdenum frame, which is not easy to break, has high strength, can meet the long-term repeated use under high temperature conditions of 1200°C-1400°C, and has the advantage of long service life. The volatilization degree of pure molybdenum under high temperature conditions is very small, and the atmosphere of the entire environment in the vacuum heat treatment furnace is very small, thereby ensuring the stability of the quality of the high-temperature alloy blade 5.

[0059] The reinforcing rod 6, the annular frame 2 and the column 1 may also be made of other metals that are suitable for high temperature conditions of 1200° C.-1400° C. and have a low volatility under high temperature conditions.

[0060] The annular frame 2 can be a polygonal frame or a circular frame.

[0061] In the embodiment where the annular frame 2 is a polygonal frame, the pillars 1 can be located at the corners of the annular frame 2, and the pillars 1 can also be arranged in the middle of the sides of the polygonal frame. By increasing the number of pillars 1, the circumferential strength of the vacuum heat treatment device can be enhanced.

[0062] like Figure 1 As shown, in an embodiment where the annular frame 2 is a rectangular frame, a column 1 is arranged at a right angle of the rectangular frame, at least one column 1 is arranged on a short side of the rectangular frame, and at least one column 1 is arranged on a long side of the rectangular frame.

[0063] The erection rod 3 and the limiting rod 4 of the vacuum heat treatment tooling disclosed in this scheme are made of corundum ceramics. The corundum ceramics are in contact with the high-temperature alloy blades 5, replacing the high-temperature alloy blades 5 in contact with metal in related technologies, effectively avoiding diffusion and adhesion between the blades and the vacuum heat treatment tooling.

[0064] In the embodiment where the erection rods 3 and the limiting rods 4 are connected to the same annular frame 2 , the erection rods 3 and the limiting rods 4 are arranged in two layers on the annular frame 2 . Preferably, the limiting rods 4 are located in the lower layer of the erection rods 3 .

[0065] The two limiting rods 4 of the limiting rod group fit with the high-temperature alloy blade 5 to effectively limit the high-temperature alloy blade 5 .

[0066] In some embodiments, an annular frame 2 specifically used for connecting with the limit rod group can be provided on the column 1. There is a certain distance between the annular frame 2 specifically used for connecting with the limit rod group and the annular frame 2 used for connecting the limit rod group and the erection rod group, so as to fix the high-temperature alloy blade 5 at two positions in the length direction of the high-temperature alloy blade 5, and further reduce the risk of collision or contact between adjacent high-temperature alloy blades 5.

[0067] Example:

[0068] The hollow blades of the engine turbine are made of high-temperature alloy. The vacuum solution temperature of the hollow blades is 1330℃. The outer dimensions of the hollow blades are 40mm long × 3mm wide × 120mm high. The dimensions of the edge plate are 40mm long × 3mm wide. After solution treatment, argon gas is required for quenching.

[0069] The size of the furnace of the vacuum heat treatment furnace is 900mm×600mm×600mm. The vacuum heat treatment tooling is designed according to the blade size and the furnace size. Figure 1The vacuum heat treatment tooling is a rectangular frame structure, which consists of a column 1, an annular frame 2, a setting rod 3 and a limiting rod 4. The column 1 and the annular frame 2 are made of pure molybdenum, and the setting rod 3 and the limiting rod 4 are ceramic rods made of 99.9% corundum ceramic.

[0070] The cross-sectional dimension of the column 1 is Ф30 mm, and the cross-sectional dimension of the rod used to form the annular frame 2 is rectangular, with a width of 6 mm and a length of 12 mm. There are 24 columns 1 and 3 annular frames 2. The bottom layer of the annular frame 2 does not need to be provided with erection rods 3 and limit rods 4. Erection rods 3 and limit rods 4 are provided on the upper and middle annular frames 2. The diameter of the jacks provided in the annular frame 2 is 9 mm. The erection rods 3 and limit rods 4 are inserted into the holes to form a mesh structure. High-temperature alloy blades 5 are placed on the mesh structure, and are suspended on the erection rods 3 by the edge plates of the high-temperature alloy blades 5, so that the high-temperature alloy blades 5 do not move in a direction perpendicular to the erection rods 3. The limit rods 4 prevent the high-temperature alloy blades 5 from moving in the length direction of the erection rods 3, so as to avoid the high-temperature alloy blades 5 from contacting with each other or contacting with the frame structure and causing diffusion and adhesion at high temperatures.

[0071] The column 1 and the annular frame 2 are composed of high-purity Mo, wherein the chemical composition of the impurities is (Wt%): Al<0.002%, Ca<0.002%, Fe<0.003%, Mg<0.002%, Ni<0.004%, Si<0.004%, C<0.010%, N<0.003%, P<0.001%, O<0.006%.

[0072] According to the size of the high-temperature alloy blades 5, high-temperature alloy blades 5 can be placed on the upper and middle mesh structures, with 64 blades in each layer and a total of 5128 high-temperature alloy blades in two layers.

[0073] After the high-temperature alloy blades 5 are subjected to vacuum heat treatment, the vacuum heat treatment tooling can fix the high-temperature alloy blades 5 well. The high-temperature alloy blades 5 do not fall off during the vacuum heat treatment process. There is no collision between the high-temperature alloy blades 5, and there is no diffusion and adhesion with the frame structure. The microstructure of each position of the high-temperature alloy blades 5 in different areas is qualified and meets the technical standard requirements.

[0074] The above description is only a preferred embodiment of the present application and an explanation of the technical principles used, and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. The scope of application involved in the present application is not limited to the technical solution formed by a specific combination of the above-mentioned technical features, but should also cover other technical solutions formed by any combination of the above-mentioned technical features or their equivalent features without departing from the above-mentioned application concept. For example, the above-mentioned features are replaced with the technical features with similar functions disclosed in this application (but not limited to) to form a technical solution.

Claims

1. A vacuum heat treatment tool, characterized in that: It comprises a column (1) and a ring frame (2), The upright posts (1) are arranged along the circumference of the annular frame (2), and the upright posts (1) are perpendicular to the plane where the annular frame (2) is located. The annular frame (2) is disposed at both the upper end and the lower end of the column (1); at least one annular frame (2) is disposed at a position between the upper end and the lower end of the column (1); and the distance between two adjacent annular frames (2) is greater than the length of the high-temperature alloy blade (5); The annular frame (2) has a setting rod group and a limiting rod group inside. The erection rod group comprises two erection rods (3) arranged in parallel, the high temperature alloy blade (5) is located between the two erection rods (3), the edge plate of the high temperature alloy blade (5) is erected on the erection rod (3), a plurality of erection rod groups are arranged side by side, and the erection rod groups are connected to the annular frame (2) located at the upper end of the column (1) and / or located between the upper end and the lower end of the column (1); The limiting rod group comprises two limiting rods (4) arranged in parallel, the high temperature alloy blade (5) is located between the two limiting rods (4), the limiting rod group is used to limit the high temperature alloy blade (5) along a length direction perpendicular to the limiting rods (4), a plurality of limiting rod groups are arranged side by side along the length direction of the erection rod (3), the limiting rod group is connected to the erection rod group or the limiting rod group and the erection rod group are connected to the same annular frame (2), The erection rod (3) and the limiting rod (4) are corundum ceramic rods.

2. The vacuum heat treatment tooling according to claim 1, characterized in that: The annular frame (2) has a plug hole, and the annular frame (2) is plug-connected to the erection rod (3) via the plug hole.

3. The vacuum heat treatment tooling according to claim 1, characterized in that: The annular frame (2) further comprises a reinforcing rod (6) parallel to the erecting rod (3) and the limiting rod (4), and is used to enhance the strength of the annular frame (2); the reinforcing rod (6) is connected to the annular frame (2); the reinforcing rod (6) divides the annular frame (2) into a plurality of small frames, and the erecting rod group and the limiting rod group are arranged in the small frames.

4. The vacuum heat treatment tooling according to claim 3, characterized in that: The reinforcing rod (6) and the annular frame (2) are made of the same material.

5. The vacuum heat treatment tooling according to claim 3 or 4, characterized in that: The cross-sectional shape of the reinforcing rod (6) is the same as the cross-sectional shape of the rod used to form the annular frame (2).

6. The vacuum heat treatment tooling according to claim 5, characterized in that: The upright column (1) is a molybdenum column, the annular frame (2) is a molybdenum frame, and the reinforcing rod (6) is a molybdenum rod.

7. The vacuum heat treatment tooling according to claim 1, characterized in that: The annular frame (2) is a rectangular frame, and the upright post (1) is located at a right angle to the annular frame (2) and in the middle of an edge of the annular frame (2).

8. The vacuum heat treatment tooling according to claim 1, characterized in that: The erection rod (3) is located above the limiting rod (4).

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