CN114473175B - Process for synchronously optimizing forming behavior of dissimilar metal friction welding joint - Google Patents
Process for synchronously optimizing forming behavior of dissimilar metal friction welding joint Download PDFInfo
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
- B23K20/12—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding
- B23K20/122—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding using a non-consumable tool, e.g. friction stir welding
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
- B23K20/12—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding
- B23K20/122—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding using a non-consumable tool, e.g. friction stir welding
- B23K20/123—Controlling or monitoring the welding process
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
- B23K20/12—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding
- B23K20/122—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding using a non-consumable tool, e.g. friction stir welding
- B23K20/123—Controlling or monitoring the welding process
- B23K20/1235—Controlling or monitoring the welding process with temperature control during joining
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
- B23K20/12—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding
- B23K20/122—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding using a non-consumable tool, e.g. friction stir welding
- B23K20/1245—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding using a non-consumable tool, e.g. friction stir welding characterised by the apparatus
- B23K20/1255—Tools therefor, e.g. characterised by the shape of the probe
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- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
- B23K20/24—Preliminary treatment
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- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
- B23K20/26—Auxiliary equipment
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Abstract
The invention relates to the technical field of dissimilar metal material friction solid phase connection, in particular to a process for synchronously optimizing forming sexual behaviors of a dissimilar metal friction welding joint. Aiming at the conventional rotary friction welding and linear friction welding technologies, the method comprises the steps of determining a given friction pressure reference value of an intersection area of high-temperature yield strengths of two metals to be connected, optimizing other process parameters influencing the friction rate based on acquired temperature information and visual information formed by flashes in the welding process, finally realizing synchronous plastic deformation and flow induction of metals on two sides of an interface in the welding process, improving the forming integrity of a joint and simultaneously strengthening the mechanical and metallurgical bonding of the interface. The process optimization method has the advantages of wide applicability, strong purposiveness, simplicity in operation, few uncontrollable factors and the like, and the integrity of the joint shape is obviously improved.
Description
Technical Field
The invention relates to the technical field of friction solid phase connection of metal materials, in particular to a process optimization method suitable for improving the forming and performance of a rotary or linear friction welding joint of dissimilar metals with intersection high-temperature strength.
Background
The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and is not necessarily to be construed as an admission or any form of suggestion that this information forms the prior art that is already known to a person of ordinary skill in the art.
The manufacture of high performance structures in modern engineering applications is not independent of the joining of dissimilar materials, particularly bimetallic composite components. The bimetal composite component can fully play the complementary advantages of the two components in performance and economy while meeting the diversified requirements of structural design, and has wide application prospect in the fields of automobile manufacturing industry, aerospace manufacturing and rail transit. At present, the permanent welding between dissimilar metals is realized by a friction welding technology, and the method is one of main process means for preparing the bimetal composite component. The difference of the dissimilar metals in thermal physical and mechanical properties provides a great challenge for how to obtain a dissimilar metal friction welding joint with excellent formability.
Different from large-difference dissimilar metal combinations such as aluminum/steel, magnesium/steel or titanium/aluminum, dissimilar metal combinations such as dissimilar aluminum alloy, dissimilar high-temperature alloy, aluminum/magnesium or titanium/steel and the like, due to the fact that physical parameters are close or intersection exists in high-temperature strength, theoretically, a single friction welding technology can be adopted to obtain a dissimilar joint with good forming and performance. As is well known, in the micro-connection mechanism of friction welding of dissimilar metals, certain high temperature and pressure, accompanied by plastic deformation, promote the close contact of metals on two sides together, and create favorable thermal conditions for metallurgical bonding. The plastic deformation and flow under the drive of friction can promote the macro/micro mechanical occlusion on both sides of the interface on one hand, and also strengthen the factors such as interstitial vacancy density or dislocation defect and the like for accelerating the diffusion and migration of metal atoms on the other hand, thereby being beneficial to the metallurgical bonding of the interface. Therefore, in the metal friction welding process, how to design technological parameter matching is achieved, and the plastic flow under certain thermal conditions is crucial to the forming performance of the joint. In particular, for dissimilar isoid alloys or titanium/steel, etc., between two metals with high temperature strength intersection, the excellent forming and performance of the joint is closely linked to the plastic deformation of the metals on both sides. At present, although researchers at home and abroad have reported a large number of friction welding tests for heterogeneous and homogeneous alloys such as heterogeneous high temperature alloys or heterogeneous and non-homogeneous alloys of titanium/steel, and have obtained joints with good mechanical properties. However, it is easy to find that the optimization of the process parameters in the existing experimental research mostly refers to the same metal friction welding research experience, and a large amount of parametric experimental designs are adopted to trial and error explore the optimized process parameter window range, so that certain blindness exists, and the engineering application is not facilitated; the different dissimilar metal friction welding optimization parameters have poor reference.
Disclosure of Invention
The invention aims to design a friction welding process parameter optimization method suitable for heterogeneous homologous alloys or heterogeneous non-homologous metals, such as titanium/steel and the like, with intersection in high temperature strength, and formulate a corresponding connection process, so as to solve the problems of blindness and difficult engineering application in the conventional process parameter optimization.
In order to achieve the technical purpose, the invention adopts the following technical scheme:
the first step is as follows: the relationship between the high-temperature yield strength and the deformation temperature of the two metal materials is compiled into a process diagram, and a region with crossed yield strengths under the high-temperature condition is obtained, namely: the high-temperature strength intersection region of dissimilar metals;
the second step is that: taking the average value of the upper limit and the lower limit of the yield strength corresponding to the intersection region as a pressure reference value of the friction welding parameter, and keeping the average value unchanged; the friction rate is optimized, and the situation that both sides of metal are not deformed due to low heat production is avoided; or the high heat production is avoided, so that the temperature of a welding area is higher than the upper limit of the temperature of an intersection area, and the soft metal is deformed;
the third step: setting friction pressure parameters and axial shortening on rotary or linear friction welding machine equipment, and keeping the parameters and the axial shortening unchanged; setting a rotation speed or vibration parameter influencing the friction rate; capturing interface edge temperature information in real time outside a welding area; starting the welding process, repeatedly debugging the friction rate from low to high to change the heat input, recording the rotating speed or vibration parameter range corresponding to the upper and lower temperature limits of the high-temperature strength intersection region, and finally determining the optimized process parameter window.
The research of the invention finds that, especially for friction welding of dissimilar metals with intersection in high-temperature strength, the matching of process parameters is reasonably planned from the basic relationship of high-temperature strength-deformation temperature-friction pressure, the cooperative plastic deformation of the metals on two sides is promoted (or the difference of macroscopic plastic deformation on two sides is reduced), and the macroscopic forming with higher integrity can be obtained; meanwhile, under the combined action of heat, force and plastic deformation, the atomic activity behavior of the friction surface areas of the metal workpieces on the two sides to be welded is activated to the maximum extent, and the interface metallurgical bonding condition is optimized. In order to achieve the purpose, the invention provides a process method for designing friction welding process parameters based on the high-temperature strength intersection region of dissimilar metals so as to optimize the formability of a friction welding joint of the dissimilar metals.
The invention has the beneficial effects that:
(1) The friction pressure reference value is determined based on the intersection region of the high-temperature strength of the dissimilar metal, so that uncertainty caused by pressure change in the process of optimizing process parameters is avoided; other process parameters influencing the friction rate are optimized based on the temperature limiting range of the high-temperature strength intersection region, and the blindness is reduced. Through an optimized rotating speed or vibration frequency parameter window under a certain friction pressure, the cooperative plastic deformation behavior of two sides of a dissimilar metal friction surface can be realized, the extrusion of the original friction surface is facilitated, and the macroscopic defects of pores, cavities, inclusions and the like caused by insufficient plastic deformation or single-side deformation are eliminated; the atom activity behaviors on two sides of the interface are fully activated, the metallurgical bonding at the atomic level is accelerated, and the bonding performance of the friction interface is integrally improved.
(2) The method has the advantages of wide applicability, strong purposiveness, simplicity in operation, few uncontrollable factors and the like, and the integrity of the joint shape is obviously improved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the invention, and are included to illustrate an exemplary embodiment of the invention and not to limit the invention.
FIG. 1 is a schematic diagram of the high temperature yield strength intersection region of dissimilar metals designed according to the present invention;
FIG. 2 is a schematic diagram of the present invention for determining the optimization range of friction welding parameters;
FIG. 3 is a schematic diagram showing the relationship between the deformation characteristics of dissimilar metals and the high temperature strength and temperature based on the optimization principle of the design of the present invention;
FIG. 4 is a dissimilar superalloy linear friction weld joint and a dissimilar steel rotary friction weld joint optimized based on the high temperature strength intersection region in a specific example.
Detailed Description
It is to be understood that the following detailed description is exemplary and is intended to provide further explanation of the invention as claimed. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
A process method for synchronously optimizing forming sexual behaviors of a dissimilar metal friction welding joint comprises the following steps:
the method comprises the following steps: obtaining the high-temperature strength intersection region of dissimilar metals
And (3) converging the relationship between the high-temperature yield strength and the deformation temperature of the two metal materials into a process diagram by adopting a physical simulation test or a material parameter calculation software solving method to obtain a region with crossed yield strengths under a high-temperature condition.
Step two: design welding process parameter matching and optimizing method
Firstly, according to the intersecting region of the high-temperature strength of the dissimilar metals obtained in the step one, the temperature range for promoting the plastic deformation of the two metals under the same thermal action can be basically determined. Taking the average value of the upper limit and the lower limit of the yield strength corresponding to the intersecting region as a pressure reference value of the friction welding parameters, and keeping the average value unchanged; only the friction rate needs to be optimized, and the situation that both sides of metal are not deformed due to low heat production is avoided; or the high heat generation is avoided, so that the temperature of a welding area is higher than the upper limit of the temperature of an intersection area, and only the soft metal deforms; therefore, the friction rate is optimized by adopting the infrared imaging technology to obtain the edge temperature of the deformed friction interface in real time in the subsequent friction welding as the criterion of the heat generation level.
Step three: starting a friction welding process and determining an optimized parameter window;
setting friction pressure parameters and axial shortening on rotary or linear friction welding machine equipment, and keeping the parameters and the axial shortening unchanged; setting a rotating speed or a vibration parameter which influences the friction rate (the initial value does not influence the optimization of a final process window); installing an infrared thermal imager outside the welding area to capture the temperature information of the interface edge in real time; starting the welding process, repeatedly debugging the friction rate from low to high to change the heat input, recording the rotating speed or vibration parameter range corresponding to the upper and lower temperature limits of the high-temperature strength intersection region, and finally determining the optimized process parameter window.
Wherein,
the relation between the metal yield strength and the temperature in the step one can adopt but not limited to a conventional hot compression physical simulator, or equipment such as a high-temperature compression test, or thermophysical parameter simulation analysis softwareSuch as JmatPro or ThermoCal, and the like, involving strain rates in the range of 0.001-10s -1 The lower limit of the temperature range is 0.4 to 0.6 times the melting point of the low-melting metal, and the upper limit is the melting point of the low-melting metal.
And step one, adopting peak stress at different strain rates and temperatures for the yield strength in the intersection region. The schematic diagram of the high temperature strength intersection region of dissimilar metals is shown in fig. 1, in which the hatched area is the intersection region range, and the actual shape thereof has a certain difference due to different material combinations. In this step, the upper and lower yield strength limits of the intersecting region need to be accurately obtained, and the friction pressure reference value is determined.
The dissimilar metal in the first step comprises dissimilar homologous alloy, dissimilar non-homologous alloy with crossed strength, such as titanium/aluminum, aluminum/magnesium and the like, and the geometric shape is a revolving body (suitable for rotary friction welding) or a block structure (suitable for linear friction welding), and the size is not limited.
The friction pressure reference value in the second step is approximately determined by the average value of the summation of the upper limit and the lower limit of the high-temperature strength intersection region; and thus the upper and lower temperature limits across the intersecting region. The upper and lower temperature limits are recorded as a temperature reference criterion for optimizing the friction rate.
And the friction rate optimization criterion in the second step is based on the deformation characteristics of the two sides of the metal, and a schematic diagram is shown in FIG. 2. Based on the high-temperature strength intersection region diagram, it can be determined that under a certain friction pressure, when the temperature of the friction interface captured by infrared camera shooting meets the intersection region range, the situation that the high-temperature strength of the metal materials on the two sides of the friction interface is lower than the friction pressure at the same time occurs, and therefore the cooperative plastic deformation behavior is induced. The method is characterized in that visual flash features are extruded from two sides, and the original friction contact surface is replaced by fresh metal materials from two sides, so that the flash features with good features are promoted.
The welding process described in the third step relates to the rotary friction welding of the revolving body parts (the main welding parameters comprise friction pressure, rotating speed and shortening) and the linear friction welding of the non-revolving body parts (the main welding parameters comprise friction pressure, vibration parameters and shortening); the friction pressure is determined by the first step, the rotating speed and the vibration parameters influencing the friction rate depend on a univariate test method, and the critical rotating speed (aiming at the rotary friction welding) and the critical vibration frequency (aiming at the linear friction welding with fixed amplitude) influencing the interface peak temperature are obtained based on the fact that the infrared temperature measurement information is matched with the temperature data of the intersection region in the first step. The recommended range of the initial value set by the rotating speed is as follows: 100-500rpm; recommended range of initial value of vibration frequency: 10-20Hz;
and step three, the infrared imager for capturing the interface temperature along with welding is fixed on the base at the advancing side by adopting a universal clamp, and the visual angle is parallel to the friction surface of the metal workpiece at the fixed side. The testing temperature range of the infrared imager meets 100-1300 ℃, and other special design requirements are not needed;
in the friction welding process, dissimilar metals to be connected are respectively fixed on the advancing side and the moving side, and the fixing sequence does not influence the optimization process; free end length L reserved for clamp constraint metal workpiece W The lower limit of the range is one half of the total shortening deformation amount. Wherein the L recommended range for the total shortened deformation: 2-15mm.
And step three, the parameter optimization window can realize the deformation of two sides of the dissimilar metal joint, so that the joint forming behavior without deformation or single-side deformation is avoided. Using a lower friction pressure parameter value will increase the risk of no deformation of the joint, whereas using a higher friction pressure parameter value will increase the risk of unilateral deformation of the joint, as shown in fig. 3.
The present invention is described in further detail below with reference to specific examples, which are intended to be illustrative of the invention and not limiting.
Example 1:
the method for optimizing the forming performance of the friction welding joint based on the high-temperature yield strength intersection region of the dissimilar metal, which is designed on the basis of the invention, is used for optimizing the forming and mechanical properties of the IN718/FGH96 dissimilar high-temperature alloy linear friction welding joint, and comprises the following steps:
step one, processing two metal materials to be connected into a plurality of cylindrical samples, acquiring yield flow stress data at different deformation rates and temperatures by adopting a thermal compression physical simulation testing machine, and drawing a curve chart of high-temperature yield strength and deformation temperature, wherein the curve chart is shown as a in figure 4.
Drawing an area with crossed high-temperature yield strengths of the two metals, and taking the high-temperature yield strength value corresponding to the centroid position of the area as the friction pressure P of the linear friction welding process parameter f As shown in fig. 4 a.
And step three, processing the IN718 and FGH96 high-temperature alloy test samples into block-shaped workpieces with the friction surface size of 14 multiplied by 10 mm. And wiping the friction surface with alcohol before welding. Inputting friction pressure on linear friction welding equipment, and setting the total shortening amount to be 4.5mm; setting the amplitude to be 2mm and keeping the amplitude unchanged, setting the initial value of the vibration frequency to be 10Hz, and gradually increasing the interval of 10Hz to finish the linear friction welding test.
In the embodiment, the acquisition of the high-temperature yield strength data is completed on a thermophysical simulation testing machine Gleeble3800, and the strain rate range is 0.01-10s -1 The temperature range is 800-1200 ℃; the IN718 and FGH96 dissimilar superalloy intersection regions thus determined are shown as a IN fig. 3, and a friction pressure recommendation of 300MPa is determined.
IN this embodiment, the IN718 superalloy workpiece is placed on the vibration side of the linear friction welder, and the FGH96 superalloy workpiece is placed on the forward side of the linear friction welder. The length of the reserved free end of the clamp is 8mm;
in the embodiment, after the total deformation of the fixed joint in the linear friction welding test is carried out, the metal extrusion flash on two sides is taken as the deformation characteristic, and the optimized vibration frequency value range is 30-50 Hz;
IN the embodiment, the friction pressure is 300MPa and the vibration frequency is 40Hz, the IN718/FGH96 heterogeneous high-temperature alloy linear friction welding joint with the two sides of the interface IN cooperation with plastic deformation is obtained, the macroscopic morphology is shown as a IN figure 3, and the fracture position after the unidirectional stretching is located on the IN718 side with lower room temperature strength.
Example 2:
the method for optimizing the formability of the friction welding joint based on the intersecting region of the high-temperature yield strengths of the dissimilar metals, which is designed based on the invention, is used for optimizing the forming and mechanical properties of the 1045 carbon steel/304 stainless steel rotary friction welding joint, and comprises the following steps:
step one, adopting JmatPro to obtain the yield strengths of 1045 carbon steel and 304 stainless steel at different temperatures and different strain rates, and drawing a high-temperature yield strength intersection region as shown in b in figure 4.
Step two, taking the high-temperature yield strength value corresponding to the centroid position of the area as the friction pressure P of the parameter of the rotary friction welding process f As shown by b in fig. 4.
And step three, processing the 304 stainless steel and 1045 carbon steel samples into rod-shaped workpieces with the diameter of 10 mm. The rubbing surface was wiped clean with alcohol before welding. Inputting friction pressure on a rotary friction welding device, and setting the total shortening amount to be 8mm; the initial rotation speed was set to 500rpm, and the interval 100 was gradually increased to complete the rotational friction welding test.
In the embodiment, the temperature range is set to be 500-1300 ℃ in JmatPro software, and the strain rate is set to be 0.01-10s -1 . The determined high temperature yield strength intersection region of 1045 and 304 dissimilar steels is shown as b in figure 3, and the recommended range of the friction pressure of 130-150MPa is determined.
In this example, the 1045 carbon steel workpiece was placed on the rotating side of the spin friction welder and the 304 stainless steel workpiece was placed on the advancing side of the spin friction welder. The length of the reserved free end of the clamp is 15mm;
in the embodiment, after the total deformation of the fixed joint in the spin friction welding test is carried out, the deformation characteristic is that the metal on two sides extrudes fins, and the optimized vibration frequency value range is 1500-2500 rpm;
in this example, a 1045/304 dissimilar steel linear friction welded joint with cooperative plastic deformation on both sides of the interface is obtained by using a friction pressure of 130MPa and a rotation speed of 2200rpm, a macro-morphology is as shown in b in fig. 4, a fracture position is located in an interface region after uniaxial stretching, but a tensile strength reaches a base material strength of 304.
Finally, it should be noted that, although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (11)
1. A process for synchronously optimizing forming behavior of a dissimilar metal friction weld joint, comprising:
the relationship between the high-temperature yield strength and the deformation temperature of the two metal materials is compiled into a process diagram, and a region with crossed yield strengths under the high-temperature condition is obtained, namely: the high-temperature strength intersection region of dissimilar metals; the relation between the yield strength and the deformation temperature relates to the strain rate range of 0.001-10s -1 The lower limit of the temperature range is 0.4 to 0.6 times of the melting point of the low-melting-point metal, and the upper limit is the melting point of the low-melting-point metal;
taking the average value of the upper limit and the lower limit of the yield strength corresponding to the intersecting domain as a pressure reference value of the friction welding parameters, and keeping the average value unchanged; the friction rate is optimized, and the situation that metal on two sides is not deformed due to low heat production is avoided; or the high heat production is avoided, so that the temperature of a welding area is higher than the upper limit of the temperature of an intersection area, and the soft metal is deformed;
setting friction pressure parameters and axial shortening on rotary or linear friction welding machine equipment, and keeping the parameters and the axial shortening unchanged; setting a rotation speed or vibration parameter influencing the friction rate; capturing interface edge temperature information in real time by adopting an infrared imager outside the welding area; starting a welding process, repeatedly debugging the friction rate from low to high to change heat input, recording the rotating speed or vibration parameters corresponding to the upper and lower temperature limits of the intersection region of the infrared temperature measurement information and the high-temperature strength, and acquiring the critical rotating speed or the critical vibration frequency influencing the peak temperature of the interface; and finally determining an optimized process parameter window by taking the metal extrusion flash at two sides as a deformation characteristic.
2. The process for simultaneously optimizing forming sexual behavior of a dissimilar metal friction weld joint as recited in claim 1 wherein the relationship of metal yield strength to temperature is determined using a conventional thermal compression physical simulator, or high temperature compression test equipment, or thermal physical parameter simulation analysis software.
3. The process for synchronously optimizing formation behavior of a dissimilar metal friction weld joint according to claim 2, wherein the thermophysical parameter simulation analysis software is JmatPro or ThermoCal.
4. The process for simultaneously optimizing forming sexual behavior of a dissimilar metal friction weld joint as recited in claim 1 wherein yield strength in the intersection region employs peak stress at different strain rates and temperatures.
5. The process for simultaneously optimizing forming sexual behavior of a dissimilar metal friction weld joint as recited in claim 1 wherein said dissimilar metals comprise: heterogeneous homologous alloys, heterogeneous non-homologous but strength-crossed alloys;
or the dissimilar metal is in a shape of a solid of revolution or a block structure.
6. The process for simultaneously optimizing the forming sexual behavior of a dissimilar metal friction weld joint as recited in claim 5 wherein the dissimilar metal is one of titanium/aluminum and aluminum/magnesium.
7. The process for simultaneously optimizing formation behavior of a dissimilar metal friction weld joint according to claim 1, wherein the friction pressure reference is determined by an average of the sum of the upper and lower limits of the high temperature strength intersection zone; and thus the upper and lower temperature limits across the intersecting region.
8. The process for simultaneously optimizing the forming sexual behavior of a dissimilar metal friction weld joint as defined in claim 1 wherein the welding process comprises: spin friction welding of rotor parts and linear friction welding of non-rotor parts; initial value range of rotation speed setting: 100-500rpm; initial value range of vibration frequency: 10-20Hz.
9. A process for simultaneously optimizing forming behavior of a dissimilar metal friction weld joint as recited in claim 1 wherein the infrared imager is mounted on the advancing side base using a universal fixture with a viewing angle parallel to the friction surface of the metal workpiece on the mounting side.
10. The process for simultaneously optimizing the forming sexual behavior of a dissimilar metal friction weld joint according to claim 1, wherein in the friction welding process, the dissimilar metals to be joined are fixed at the advancing side and the moving side, respectively;
or the lower limit of the length range of the reserved free end of the metal workpiece is limited by the clamp to be one half of the total shortened deformation.
11. A process for simultaneously optimizing forming behaviour of a dissimilar metal friction weld joint according to claim 10, wherein the total reduction deformation is in the range of 2-15mm.
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