Calculation method for inertia friction welding axial size of dissimilar material

Abstract

The invention relates to a method for calculating the inertia friction welding axial size of dissimilar materials, which belongs to the technical field of welding and specifically comprises the following steps of: performing a thermal compression experiment on two materials to be welded; multiple groups of stress and strain data of the two to-be-welded materials are obtained through multiple experiments; fitting a plastic deformation rate and strain curve according to multiple groups of experimental data; the relation between the plastic deformation rate and the welding parameters is established by combining the relation between the strain and the welding pressure and the relation between the strain and the welding area; and according to the relation between the axial size and the plastic deformation rate and the welding time, the relation between the axial size and the welding pressure and the relation between the welding area and the welding time are established. According to the calculation method for the inertia friction welding axial size of the dissimilar material, an estimated value is provided for reference before actual welding operation, and the machining efficiency is improved.

Description

Technical Field

[0001] This invention belongs to the field of welding technology, and particularly relates to a method for calculating the axial dimension of inertial friction welding of dissimilar materials, especially to inertial friction welding of multi-stage disc-shaped parts for aero-engines. Background Technology

[0002] Inertial friction welding technology is used in the manufacture of aero-engines, especially in the production of compressor multi-stage disks. Currently, there are no readily available axial dimensional references for developing inertial friction welding processes for dissimilar materials. Technical requirements are primarily met through numerous trial-and-error experiments based on the experience of engineers. This results in long development cycles and high costs, severely impacting the research and development progress of dissimilar material compressor multi-stage disks for aero-engines. Summary of the Invention

[0003] To address the shortcomings of existing technologies, this invention provides a method for calculating the axial dimension of inertial friction welding of dissimilar materials, providing an estimated value for reference before actual welding operations and improving processing efficiency.

[0004] A method for calculating the axial dimension of inertial friction welding of dissimilar materials, specifically including the following steps:

[0005] A hot compression test was performed on two materials to be welded.

[0006] Multiple experiments were conducted to obtain multiple sets of stress and strain data for the two materials to be welded.

[0007] The curves of plastic deformation rate and strain were fitted based on multiple sets of experimental data;

[0008] By combining the relationship between strain, welding pressure, and welding area, the relationship between plastic deformation rate and welding parameters is established.

[0009] Based on the relationship between axial dimension and plastic deformation rate and welding time, the relationship between axial dimension and welding pressure, welding area and welding time is established.

[0010] When performing a hot compression test on the materials to be welded, the stress and strain are measured under the welding temperature range, plastic deformation rate, and given welding pressure.

[0011] In establishing the relationship between plastic deformation rate and welding parameters, multiple sets of values ​​are selected from the fitted plastic deformation rate and strain curves. Based on the relationship between strain and welding pressure and welding area, multiple sets of data between welding pressure and strain are calculated, thereby fitting the curve of plastic deformation rate and welding pressure.

[0012] When establishing the relationship between axial dimension, welding pressure, welding area and welding time, it is determined that the axial dimension of inertial friction welding of dissimilar materials is the sum of the axial dimensions of the two materials to be welded.

[0013] The axial dimension of one type of welding material I is the product of the plastic deformation rate and the welding time.

[0014] Before conducting hot compression tests on the two materials to be welded, the parts to be welded from the two materials were manufactured according to actual needs.

[0015] The two materials to be welded are GH4169 alloy and FGH96 alloy.

[0016] By employing the above technical solution, the present invention has at least the following beneficial effects:

[0017] The method for calculating the axial dimension of inertial friction welding provided by this invention can obtain a reasonable predicted value of the welding axial dimension based on the physical properties of dissimilar materials, providing a reference for actual welding and reducing the number of repeated welding operations in process development experiments. At the same time, it can predict the change of the axial dimension of the part after inertial friction welding based on the fitted curve relationship, which improves the process development efficiency of dissimilar material parts and can reduce the process development cost, further accelerating the development process of new aero-engine compressor parts.

[0018] This invention is applied to the manufacturing of multi-stage disc-shaped components for aero-engine compressors, improving the efficiency of process development experiments, increasing the R&D efficiency of multi-stage disc-shaped components, and reducing experimental costs, thus meeting the needs of new product development and production. Using this welding method for component processing, the component value is approximately 200,000 yuan per unit. Based on an annual production of 100 units, the estimated annual economic income is: 100 units × 800,000 yuan / unit = 20 million yuan. Attached Figure Description

[0019] Figure 1 This is a flowchart illustrating the calculation of the axial dimension of inertial friction welding according to the present invention.

[0020] Figure 2 This is a schematic diagram of an embodiment of the present invention, namely, Example 1.

[0021] 1. Welding material I, 2. Welding material II. Detailed Implementation

[0022] To better explain and facilitate understanding of the present invention, the technical solution and effects of the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0023] Combination Figures 1-2 As shown, this embodiment takes the welding of GH4169 alloy and FGH96 alloy as an example, with GH4169 alloy as welding material I and FGH96 alloy as welding material II. A method for calculating the axial dimension of dissimilar material inertial friction welding is adopted, specifically including the following steps:

[0024] Step 1: Preparation of parts to be welded:

[0025] First, the manufacturing of the parts to be welded from both materials is completed.

[0026] Step Two: Experimental Measurement of the Materials to be Welded

[0027] Hot compression tests were conducted on welding material I GH4169 alloy to measure its plastic deformation rate within the welding temperature range. and stress under given welding pressure and strain After multiple experiments, multiple sets of stress were obtained. and strain The data is shown in Table 1.

[0028] Hot compression tests were conducted on welding material II FGH96 alloy to measure its performance within the welding temperature range and its plastic deformation rate. and stress under given welding pressure and strain After multiple experiments, multiple sets of stress were obtained. and strain The data is shown in Table 2.

[0029] Table 1. Experimental data of hot compression of GH4169 material

[0030]

[0031] Table 2. Experimental data of FGH96 material under hot compression

[0032]

[0033] Step 3: Using the multiple sets of data for welding material I obtained in Step 2, fit the plastic deformation rate. and strain The curve is:

[0034] (1)

[0035] in, The plastic deformation rate of the welding material I GH4169 alloy. The strain is that of the welding material I GH4169 alloy.

[0036] Using multiple sets of data for welding material II obtained in step two, the plastic deformation rate was fitted. and strain The curve is:

[0037] (2)

[0038] in, The plastic deformation rate of welding material II FGH96 alloy, Strain of welding material II FGH96 alloy.

[0039] Step 4: Establish the relationship between plastic deformation rate and welding parameters:

[0040] Based on material stress and strain and welding pressure By studying the relationship between strain and welding area, multiple sets of strain and welding pressure data were obtained, and a strain-welding pressure curve was fitted.

[0041] In this embodiment, the welding area of ​​welding material I 2000mm 2 elastic modulus The value is 141 GPa. The plastic deformation rate fitted in step three is... and strain Multiple sets of values ​​were selected from the curves, and multiple sets of data on the relationship between welding pressure and strain were calculated based on the relationship between strain and welding pressure and welding area (3), (4), and (5).

[0042] (3)

[0043] (4)

[0044] Substituting (3) into (4), we get (5),

[0045] Then, based on multiple sets of data on welding pressure and strain, a curve of welding pressure versus stress is fitted to obtain the fitted plastic deformation rate. With welding pressure The curve.

[0046] (6)

[0047] In this embodiment, the welding area of ​​welding material II is... 2200mm 2 elastic modulus The value is 163 GPa. The plastic deformation rate fitted in step three... and strain Multiple sets of values ​​were selected from the curves, and data on the relationship between welding pressure and welding area were calculated based on the relationships (7), (8), and (9):

[0048] (7)

[0049] (8)

[0050] Substituting (7) into (8), we get (9),

[0051] Then, based on multiple sets of data on welding pressure and strain, a curve of welding pressure versus strain is fitted to obtain the fitted plastic deformation rate. With welding pressure The curve.

[0052] (10)

[0053] Step 5: Establish axial dimensions With welding pressure And the relationship between welding area and welding time:

[0054] Axial dimensions of welding according to welding material I Plastic deformation rate The axial dimension of the weld is the product of welding time and welding material II. Plastic deformation rate The product of welding time and the total axial dimension of the welded part made of the two materials. Axial dimension for welding material I Axial dimension of welding with welding material II The sum of these values ​​represents the plastic deformation rate fitted in step four. With welding pressure The curve and plastic deformation rate With welding pressure Multiple sets of values ​​were selected from the curve to obtain the total axial dimension of the welded part. With welding pressure Multiple sets of data, including welding area and welding time.

[0055] Right now ,Will and Substituting the values, we get:

[0056] (11)

[0057] in, This refers to the overall axial dimension of the welded part. This is the welding time. This establishes the axial dimension of the weld. With welding pressure Welding area S and welding time The relationship. Before welding, the axial dimension of the weld is calculated based on multiple sets of welding pressure, welding area, and welding time. This provides a reference for actual welding.

Claims

1. A method for calculating the axial dimension of inertial friction welding of dissimilar materials, characterized in that, Specifically, the following steps are included: A hot compression test was performed on two materials to be welded. Multiple experiments were conducted to obtain multiple sets of stress and strain data for the two materials to be welded. The curves of plastic deformation rate and strain were fitted based on multiple sets of experimental data; By combining the relationship between strain, welding pressure, and welding area, the relationship between plastic deformation rate and welding parameters is established. Based on the relationship between axial dimension and plastic deformation rate and welding time, the relationship between axial dimension and welding pressure, welding area and welding time is established.

2. The method for calculating the axial dimension of dissimilar material inertial friction welding according to claim 1, characterized in that: When performing a hot compression test on the materials to be welded, the stress and strain are measured under the welding temperature range, plastic deformation rate, and given welding pressure.

3. The method for calculating the axial dimension of dissimilar material inertial friction welding according to claim 1, characterized in that: In establishing the relationship between plastic deformation rate and welding parameters, multiple sets of values ​​are selected from the fitted plastic deformation rate and strain curves. Based on the relationship between strain and welding pressure and welding area, multiple sets of data between welding pressure and strain are calculated, thereby fitting the curve of plastic deformation rate and welding pressure.

4. The method for calculating the axial dimension of dissimilar material inertial friction welding according to claim 1, characterized in that: When establishing the relationship between axial dimension, welding pressure, welding area and welding time, it is determined that the axial dimension of inertial friction welding of dissimilar materials is the sum of the axial dimensions of the two materials to be welded.

5. The method for calculating the axial dimension of dissimilar material inertial friction welding according to claim 4, characterized in that: The axial dimension of one type of welding material I is the product of the plastic deformation rate and the welding time.

6. The method for calculating the axial dimension of dissimilar material inertial friction welding according to claim 1, characterized in that: Before conducting hot compression tests on the two materials to be welded, the parts to be welded from the two materials were manufactured according to actual needs.

7. The method for calculating the axial dimension of dissimilar material inertial friction welding according to claim 6, characterized in that: The two materials to be welded are GH4169 alloy and FGH96 alloy.

Images