High-temperature alloy connecting method and high-temperature alloy connector
By combining tenon joints and welding, the problem of poor joint performance in high-temperature alloy welding under high temperature and high stress environments has been solved, achieving a highly reliable connection and improving the service performance of aero engines.
Patent Information
- Application Number
- CN202511767903.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-28
- Publication Date
- 2026-01-23
AI Technical Summary
Existing high-temperature alloy welding methods are difficult to achieve highly reliable connections in high-temperature and high-stress environments, resulting in poor joint durability and fatigue performance, which makes it difficult to meet the service requirements of aero-engines.
A combination of tenon joint and welding is used. By applying a solder resist to the contact surface between the base material and the welding fixture, and using silver-based or nickel-based solder for vacuum brazing, combined with specific welding parameters, a mechanical interlocking structure is formed to improve the joint performance.
It improves the durability and fatigue performance of the joint, avoids rapid fracture, enhances the metallurgical bond between the base materials, and improves the service reliability of the aero-engine.
Smart Images
Figure CN121373618A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The application relates to the technical field of high-temperature alloys, and in particular to a high-temperature alloy connecting method and a high-temperature alloy joint. BACKGROUND
[0002] High-temperature alloys have excellent high-temperature performance and are commonly used to manufacture hot-end components of an aero-engine. Some hot-end components have a complex internal cavity structure, and the connecting problem is bound to be designed in the manufacturing process thereof. Since the hot-end components of the aero-engine are often served in a high-temperature and high-stress environment, the high-reliability connection of the high-temperature alloy is crucial to the long-time service safety of the aero-engine. The connection of the high-temperature alloy component is usually achieved by using a welding method, such as transient liquid phase diffusion welding (TLP diffusion welding), which has high precision and is widely used for the connection of the high-temperature alloy component with a complex internal cavity structure. The welding material of the high-temperature alloy is mostly made of B and Si elements as a melting element, and continuous intermetallic compounds and interface diffusion affected zones are easily generated in the center of the weld. Therefore, the joint has poor endurance and fatigue performance, and it is difficult to meet the actual demand. SUMMARY
[0003] The application provides a high-temperature alloy connecting method and a high-temperature alloy joint to solve the problems in the background.
[0004] In a first aspect, the application provides a high-temperature alloy connecting method, comprising: After tenon jointing the male base material and the female base material to be connected, the male base material and the female base material are fixed by using a specific welding tool. The male base material, the female base material and the welding tool are placed in a high-temperature vacuum furnace for welding.
[0005] Further, before the tenon jointing the male base material and the female base material to be connected and the fixing by using the specific welding tool, the method further comprises: The welding material is placed on the contact surface of the male base material and the female base material to be connected respectively.
[0006] Further, before the male base material, the female base material and the welding tool are placed in the high-temperature vacuum furnace for welding, the method further comprises: The solder resist is coated on the contact surface of the male base material, the female base material and the welding tool respectively.
[0007] Further, the welding material comprises silver-based solder and nickel-based solder.
[0008] Further, the welding material is an amorphous alloy foil with a thickness of 10-50 microns or an alloy powder with a particle size range of 10-100 microns.
[0009] Further, the welding parameter range is a heating rate of 10-15℃ / min, a brazing temperature of 1000-1200℃, and a holding time of 10-240min followed by furnace cooling.
[0010] Further, during the welding process, the vacuum degree in the furnace is higher than 1x10 -2 Pa.
[0011] In a second aspect, the application provides a high-temperature alloy joint obtained by the high-temperature alloy connecting method as described above.
[0012] The above technical solution of the application has the following advantages: The high-temperature alloy connecting method provided in the first aspect of the application combines dowel connection and welding, and in the service process of the component, the base material and the weld together bear the external force, the force acting on the joint can be conducted through the base material, which can improve the endurance and fatigue performance of the joint. Compared with a flat welded joint, in the service process of the dowel and welding composite joint, when a certain welding position fails, the mechanical interlocking structure of the concave-convex nesting can still maintain a certain strength, avoiding rapid fracture failure. Compared with a simple dowel structure, the interlocking position of the dowel and welding composite joint realizes metallurgical bonding, which not only can greatly improve the performance, but also can avoid the wear between the base materials.
[0013] It can be understood that the beneficial effects of the above-mentioned second aspect can be referred to the related description in the first aspect, which will not be repeated here. BRIEF DESCRIPTION OF DRAWINGS
[0014] In order to more clearly illustrate the technical solutions of the embodiments of the application or the prior art, the following will briefly introduce the drawings needed to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the application, and for those skilled in the art, other drawings can also be obtained without creative labor.
[0015] Figure 1 The high-temperature alloy connecting assembly schematic diagram provided by the application. DETAILED DESCRIPTION
[0016] In order to make the technical problems, technical solutions and beneficial effects of the application more clearly understood, the following will further describe the application in detail with examples. It should be understood that the specific embodiments described herein are only used to explain the application, and are not used to limit the application.
[0017] In this application, "at least one" means one or more, and "multiple" means two or more. "At least one of the following (one)" or the like means any combination of the items, including any combination of single (one) or multiple items. For example, "at least one of a, b, or c", or "at least one of a, b, and c" can mean a, b, c, a-b (i.e., a and b), a-c, b-c, or a-b-c, where a, b, and c can be single or multiple.
[0018] It should be understood that the size of the sequence number of the above-mentioned processes in various embodiments of the present application does not mean the order of execution, and part or all of the steps can be executed in parallel or in sequence, and the execution order of the processes should be determined according to their functions and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.
[0019] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the present application. The singular forms "a", "said" and "the" used in the embodiments of the present application and the appended claims are also intended to include the plural forms, unless the context clearly indicates otherwise.
[0020] The weight of the related components mentioned in the specification of the embodiments of the present application can not only refer to the specific content of each component, but also represent the weight ratio relationship between each component, therefore, as long as the content of the related components in the specification of the embodiments of the present application is enlarged or reduced in proportion, it is within the scope disclosed in the specification of the embodiments of the present application. Specifically, the mass mentioned in the specification of the embodiments of the present application can be µg, mg, g, kg, etc. mass units well known in the chemical industry.
[0021] The terms "first", "second" are only used for description purposes, to distinguish objects such as substances from each other, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. For example, without departing from the scope of the embodiments of the present application, the first XX can also be called the second XX, and similarly, the second XX can also be called the first XX. Therefore, the features limited by "first" and "second" can explicitly or implicitly include one or more of the features.
[0022] The purpose of the present application is to provide a high-temperature alloy connecting method and high-temperature alloy joint based on the composite effect of mortise and welding, which is applied to high-temperature alloy parts, can effectively improve the performance, and meet the service requirements of aero-engine.
[0023] The specific embodiments of the present application are described in detail below in conjunction with the drawings and examples. The following examples are used to illustrate the present application, but are not used to limit the scope of the present application.
[0024] The embodiment of the application provides a high-temperature alloy connecting method, which comprises the following steps: after tenon connection of a male base material and a female base material to be connected, the male base material and the female base material are fixed by using a specific welding tool; and the male base material, the female base material and the welding tool are placed in a high-temperature vacuum furnace for welding.
[0025] In order to realize high-reliability manufacturing of high-temperature alloy components, a new connecting method needs to be developed from the perspective of structural design of a connecting position. As a traditional connecting method, tenon connection forms a mechanical interlocking structure through concave-convex nesting of base materials (base materials), which can still maintain good structural integrity under the action of a larger external force. The tenon connection is combined with the welding method, and under the action of an external force, the force acting on the joint can be conducted through the base material, that is, the base material and the weld together bear the action of the external force, which helps to increase the overall rigidity of the joint and improve the endurance and fatigue performance of the joint, thereby further promoting the development of an aero-engine.
[0026] In some embodiments, before the tenon connection of the male base material and the female base material to be connected, the male base material and the female base material are fixed by using a specific welding tool, the method further comprises the following steps: respectively placing welding materials on the contact surfaces of the male base material and the female base material to be connected.
[0027] In some embodiments, before the male base material, the female base material and the welding tool are placed in a high-temperature vacuum furnace for welding, the method further comprises the following steps: respectively coating the contact surfaces of the male base material, the female base material and the welding tool with a solder resist.
[0028] In some embodiments, the welding material comprises a silver-based solder and a nickel-based solder.
[0029] In some embodiments, the welding material is an amorphous alloy foil with a thickness of 10-50 microns or an alloy powder with a particle size range of 10-100 microns.
[0030] In some embodiments, the welding parameter range is a heating rate of 10-15℃ / min, a brazing temperature of 1000-1200℃, and a holding time of 10-240 min for furnace cooling.
[0031] In some embodiments, during the welding process, the vacuum degree in the furnace is higher than 1×10 -2 Pa.
[0032] The high-temperature alloy base material has two types of shapes, including a male base material and a female base material. The welding material is placed on the contact surfaces of the male base material and the female base material before welding. After the male base material and the female base material are fixed by using a specific welding tool, the base material and the tool are placed in a high-temperature vacuum furnace for welding.
[0033] The welding material includes but is not limited to silver-based solder, nickel-based solder. The welding material can be an amorphous alloy foil strip with a thickness of 10-50 μm or an alloy powder with a particle size range of 10-100 μm. The contact surfaces of the convex base material and the concave base material with the welding tooling need to be coated with a solder resist. The welding parameter range can be selected as a heating rate of 10-15 ℃ / min, a brazing temperature of 1000-1200 ℃, and a holding time of 10-240 min followed by furnace cooling. During the welding process, the vacuum degree in the furnace is higher than 1×10 -2 Pa.
[0034] The application also provides a high-temperature alloy joint obtained by the high-temperature alloy connecting method.
[0035] The application will be described below by means of specific embodiments.
[0036] Embodiment The base material is selected as GH4169 high-temperature alloy, and the welding material is BNi-2 amorphous foil strip with a thickness of 50 μm. The GH4169 high-temperature alloy base material has two types of shapes, including a convex base material and a concave base material. The welding material is placed on the contact surface of the convex base material and the concave base material before welding, and the convex base material and the concave base material are assembled and fixed by using a specific welding tooling (an assembly schematic diagram is shown in FIG. 1) and then placed in a high-temperature vacuum furnace together with the tooling for welding. Figure 1
[0037] The welding process is as follows: the temperature is raised from room temperature to 1050 ℃ at a heating rate of 10 ℃ / min, and then the temperature is kept for 120 min followed by furnace cooling.
[0038] The tensile strength of the joint at room temperature and at 650 ℃ is tested, and three parallel samples are taken, as shown in Table 1.
[0039] Comparative Example The base material is selected as GH4169 high-temperature alloy, and the welding material is BNi-2 amorphous foil strip with a thickness of 50 μm. The welding material is placed on the contact surface of the base material, and then assembled and fixed and placed in a vacuum furnace for welding.
[0040] The welding process is as follows: the temperature is raised from room temperature to 1050 ℃ at a heating rate of 10 ℃ / min, and then the temperature is kept for 120 min followed by furnace cooling.
[0041] The tensile strength of the joint at room temperature and at 650 ℃ is tested, and three parallel samples are taken, as shown in Table 1.
[0042] Table 1 The high-temperature alloy connecting method and the high-temperature alloy joint provided by the embodiment of the application combine the dowel joint and the welding, in the service process of the component, the base material and the weld jointly bear the external force, the force borne by the joint can be conducted by the base material, the endurance and fatigue performance of the joint can be improved. Compared with the plane welding joint, in the service process of the dowel joint and the welding composite joint, when a welding position fails, the mechanical interlocking structure of the concave-convex nesting can still maintain a certain strength, and rapid fracture failure can be avoided. Compared with the pure dowel joint structure, the interlocking position of the dowel joint and the welding composite joint realizes metallurgical bonding, not only the performance can be greatly improved, but also the wear between the base materials can be avoided.
[0043] It should be noted that each of the embodiments in the specification is described in a progressive manner, and the same or similar parts of each of the embodiments can be referred to each other, and each of the embodiments mainly describes the difference from other embodiments. The application is not limited to the specific method described above and shown in the drawings. Moreover, for the sake of brevity, detailed description of known methods and techniques is omitted.
[0044] The above-described embodiments are only used to illustrate the technical solutions of the application, rather than limit them; although the application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can still be modified, or some technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the application, and should be included in the protection scope of the application.
Claims
1. A method of joining high temperature alloys, characterized by, The application relates to a high-temperature alloy connecting method. The convex and concave base materials to be connected are tenoned, and then are assembled and fixed by using a special welding tool; The convex and concave base materials and the welding tool are put into a high-temperature vacuum furnace for welding.
2. The high temperature alloy joining method of claim 1, wherein Before the convex and concave base materials to be connected are tenoned and then are assembled and fixed by using a special welding tool, the method further comprises the following steps: Welding materials are respectively placed on the contact surfaces of the convex and concave base materials to be connected.
3. The high temperature alloy joining method of claim 1, wherein Before the convex and concave base materials and the welding tool are put into a high-temperature vacuum furnace for welding, the method further comprises the following step: Anti-welding agents are respectively coated on the contact surfaces of the convex and concave base materials and the welding tool.
4. The high temperature alloy joining method of claim 2, wherein The welding materials comprise silver-based solder and nickel-based solder.
5. The high temperature alloy joining method according to claim 2, wherein The welding materials are amorphous alloy foil strips with a thickness of 10-50 mu m or alloy powders with a particle size range of 10-100 mu m.
6. The high temperature alloy joining method of claim 1, wherein The welding parameters range from a temperature rising rate of 10-15 DEG C / min, a brazing temperature of 1000-1200 DEG C, a holding time of 10-240 min and furnace cooling.
7. The high temperature alloy joining method of claim 1, wherein During the welding process, the vacuum in the furnace is higher than 1 x 10 -2 Pa.
8. A high temperature alloy joint, characterized by The high-temperature alloy connecting method is obtained by the method as claimed in any one of claims 1 to 7.