A method for preparing a si c fiber reinforced metal matrix composite solid shaft preform

Abstract

The present application relates to the field of metal matrix composite structure preparation, in particular to a kind of SiC fiber reinforced metal matrix composite solid shaft preform preparation method. It is prepared by SiC fiber reinforced metal matrix composite precursor filament (hereinafter referred to as precursor filament) bundle, precursor filament bundle insertion and preform sheath assembly and other processes. The present application prepares non-interlaced and dense precursor filament bundle by winding, shearing and splicing. Different shapes of limiting groove of winding wheel correspond to different cross sections of reinforcement. The winding circumference of winding wheel is designed according to the required length of precursor filament bundle and the shape of limiting groove. By using roller pressing propulsion device, the precursor filament bundle and the shaft sheath are inserted and matched, which can effectively solve a series of technical problems such as bending, interlacing and loosening of precursor filament bundle during assembly with sheath.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of metal matrix composite structure preparation, in particular to a SiC fiber reinforced metal matrix composite solid shaft preform preparation method, which is suitable for metal matrix composite shaft preparation. BACKGROUND

[0002] Continuous SiC fiber reinforced metal matrix composite has high specific strength, high specific stiffness, good high temperature resistance, and good creep resistance and fatigue resistance, and is an ideal high temperature lightweight structural material. Tube shaft type structural members prepared from this material have clear application prospects in the fields of aviation, aerospace and deep sea.

[0003] SiC fiber reinforced metal matrix composite solid shaft type structural members are usually prepared by a precursor filament preform method. This method has the advantages of no limitation on the type and composition of the matrix alloy, precise control of the fiber volume fraction, and certain weaving properties, and is particularly suitable for preparing structural members with complex shapes such as tubes and shafts. The main process flow is as follows: first, a composite precursor filament is prepared by coating the matrix alloy on the surface of SiC fiber using physical vapor deposition technology; then the precursor filament is woven and laid in the preform sleeve; then the components of the preform sleeve are assembled and fixed; finally, densification molding of the structural member is completed by high temperature pressing.

[0004] At present, SiC fiber reinforced metal matrix composite solid shaft type members have not been widely applied. The main reasons are the limitations of preparation cost and process difficulty. The main technical difficulties in the preform preparation process of this type of member are: (1) high process difficulty in preparing dense and non-interlaced composite precursor filament bundles; (2) different cross-sectional shapes and sizes of the reinforcing body have a great influence on the laying process of the composite precursor filament bundle; (3) due to the large length-diameter ratio of the shaft (usually ≥10:1), the composite precursor filament bundle is prone to bending, interlacing and loosening during assembly with the sleeve, resulting in performance degradation of the member after molding. SUMMARY

[0005] The purpose of the present application is to provide a SiC fiber reinforced metal matrix composite solid shaft preform preparation method to solve the technical problems of difficult laying of precursor filament bundles and assembly of sleeves in the preparation process of SiC fiber reinforced titanium matrix composite long shaft members due to factors such as large length-diameter ratio of the shaft and cross-sectional shape and size of the reinforcing body.

[0006] The technical solution of the present application is:

[0007] A SiC fiber reinforced metal matrix composite solid shaft preform preparation method comprises the steps of SiC fiber reinforced metal matrix composite precursor filament bundle preparation, precursor filament bundle insertion and preform sleeve assembly.

[0008] (1) According to the design requirements of the shaft reinforcement, the total amount of SiC fiber reinforced metal matrix composite precursor wire is determined;

[0009] (2) According to the material, cross-sectional shape and size, and length information of the reinforcing body of the shaft, the precursor wire winding wheel is designed and processed;

[0010] (3) The precursor wire is closely arranged on the precursor wire winding wheel by using a precision winding device, and is fixed by using an organic binder or a clamp;

[0011] (4) The precursor wire bundle is cut and spliced according to the required length of the reinforcing body in the shaft, and a precursor wire bundle with the same cross-sectional shape as the reinforcing body is prepared, and is fixed by using an organic binder or a clamp;

[0012] (5) The prepared precursor wire bundle and the shaft body sleeve are placed on the precursor wire roller pressing and advancing device, the precursor wire bundle is tightly fixed by using a roller pressing wheel, and the precursor wire bundle is inserted into the shaft body sleeve from one end of the shaft body sleeve to the inside of the shaft body sleeve by rotating the roller pressing wheel until the predetermined position of the precursor wire bundle is reached;

[0013] (6) The shaft body sleeve with the inserted precursor wire bundle is assembled with other parts to complete the preparation of the SiC fiber reinforced metal matrix composite shaft preform.

[0014] The SiC fiber reinforced metal matrix composite solid shaft preform preparation method, the SiC fiber reinforced metal matrix composite precursor wire is composed of a metal coating deposited on the surface of the SiC fiber, the volume fraction of the SiC fiber is 20-80%, and the rest is the metal coating, and the metal coating is an aluminum alloy, a titanium alloy or a high-temperature alloy.

[0015] The SiC fiber reinforced metal matrix composite solid shaft preform preparation method, the precursor wire bundle preparation process is as follows:

[0016] (1) A precursor wire winding wheel is made, a limiting groove is provided on the outer periphery of the precursor wire winding wheel, and the precursor wire winding wheel is designed and processed according to the material, cross-sectional shape, size and length information of the composite material shaft;

[0017] (2) The precursor wire bundle is wound, and the precursor wire is closely wound without overlapping by using a precision winding device;

[0018] (3) The precursor wire bundle is cut, and the precursor wire bundle is cut according to the required length of the shaft to form the precursor wire bundle;

[0019] (4) The precursor wire bundle is assembled, and the precursor wire bundle is integrated or spliced according to the cross-sectional size of the reinforcing body.

[0020] The SiC fiber reinforced metal matrix composite solid shaft preform preparation method, the winding limiting groove in the precursor filament winding wheel is designed according to the cross-sectional shape and size of the reinforcing body, the cross section of the reinforcing body is a circular symmetric structure, the winding limiting groove is designed as a semicircle of one half of the cross section of the reinforcing body, and the winding circumference of the precursor filament winding wheel is designed according to the required length of the precursor filament bundle and the shape of the limiting groove.

[0021] The SiC fiber reinforced metal matrix composite solid shaft preform preparation method, the precursor filament bundle insertion process is specifically as follows: the prepared precursor filament bundle and the shaft body sheath are placed on the precursor filament roller pressing and advancing device, the precursor filament bundle is tightly fixed by using a roller pressing wheel, the shaft body sheath is horizontally arranged on the output end of the precursor filament bundle, the center hole of the shaft body sheath is consistent with the shape and size of the precursor filament bundle, the precursor filament bundle is inserted into the shaft body sheath from one end of the shaft body sheath to the inside of the shaft body sheath by rotating and advancing the roller pressing wheel until the predetermined position of the precursor filament bundle is reached.

[0022] The SiC fiber reinforced metal matrix composite solid shaft preform preparation method, in the precursor filament roller pressing and advancing device, the outer contour between the counter-rotating roller pressing wheels is consistent with the cross-sectional shape and size of the precursor filament bundle, and the device should have the functions of roller pressing pressure adjustment and rotating advancement.

[0023] The SiC fiber reinforced metal matrix composite solid shaft preform preparation method, the preform sheath assembly process is specifically as follows: the two ends of the shaft body sheath into which the precursor filament bundle is inserted are assembled and matched with the sheath end caps respectively to form the preform sheath.

[0024] The design idea of the application is:

[0025] The application prepares the non-interlaced and dense precursor filament bundle by winding, shearing and splicing; the limiting groove of the winding wheel corresponds to the cross section of the reinforcing body in different shapes, the shape of the limiting groove is designed according to the cross-sectional shape and size of the reinforcing body, generally, the cross section of the reinforcing body is a symmetric shape, and the winding limiting groove can be designed as one half of the shape of the cross section, for example, the limiting groove shape can be designed as a semicircle when the cross section is circular; the winding circumference of the precursor filament winding wheel is designed according to the required length of the precursor filament bundle and the shape of the limiting groove; the precursor filament bundle and the shaft body sheath are inserted and matched by using the roller pressing and advancing device, the outer contour of the roller pressing wheel in the precursor filament roller pressing and advancing device is consistent with the cross-sectional shape and size of the precursor filament bundle, and the device should have the functions of roller pressing pressure adjustment and rotating advancement, so as to solve the technical problems that the precursor filament bundle is prone to bending, interlacing and loosening during the assembly process with the sheath.

[0026] The application has the following advantages and beneficial effects:

[0027] 1、The precursor filament bundle prepared by winding, shearing and splicing in the application is without interlacing and dense, and the precursor filament bundle and the shaft sleeve are inserted and matched by using the roller pressing device, which can effectively solve the problems of bending, interlacing and loosening of the precursor filament bundle during assembly with the sleeve, thereby ensuring that the precursor filament can be continuously and uniformly distributed in the shaft, and effectively improving the performance of the finished structural member.

[0028] 2、The limiting groove is designed according to the shape and size of the cross section of the reinforcing body, and can be suitable for preparing various types of reinforcing body cross sections.

[0029] 3、The precursor filament bundle is laid without interlacing and with high density, which is beneficial to the size control and performance quality of the finished member.

[0030] 4、The tool structure involved in the application is simple, which is beneficial to processing and preparation and subsequent maintenance.

[0031] 5、The method can effectively solve the technical difficulties in the preparation process of the prefabricated body, and has been verified in practice, and can realize the preparation of SiC fiber reinforced metal matrix composite long shaft, and provides certain technical support for expanding the application field of SiC fiber reinforced metal matrix composite shaft member. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figures 1-2 The figure is the front view and sectional view of the precursor filament winding wheel involved in the application, wherein: Figure 1 is the front view, Figure 2 is the sectional view.

[0033] Figure 3 The figure is the preparation flow chart of the solid shaft prefabricated body involved in the application, wherein: (a) is the precursor filament winding schematic diagram, (b) is the cross section schematic diagram after the precursor filament winding, (c) is the precursor filament bundle cutting and unfolding schematic diagram, (d) is the precursor filament bundle splicing process schematic diagram, (e) is the precursor filament bundle splicing after schematic diagram, (f) is the precursor filament bundle and sleeve insertion process schematic diagram, and (g) is the prefabricated body assembly after schematic diagram.

[0034] Figures 1-3 The figure is the front view and sectional view of the precursor filament winding wheel involved in the application, wherein: DETAILED DESCRIPTION

[0035] In order to express clearly and accurately, the application is described below in combination with the drawings.

[0036] As Figures 1-3As shown, the present application provides a method for preparing a SiC fiber reinforced metal matrix composite solid shaft preform, which comprises the following steps: preparing a bundle of SiC fiber reinforced metal matrix composite precursor filaments, inserting the bundle of precursor filaments, and assembling a preform cover.

[0037] 1. Preparation of the bundle of precursor filaments

[0038] (1) A precursor filament winding wheel 1 is made, and a limiting groove 1.1 is formed on the outer periphery of the precursor filament winding wheel 1. The limiting groove 1.1 is designed and processed according to the material of the composite shaft, the cross-sectional shape and size of the reinforcing body, and the length, etc. Generally, the cross-section of the reinforcing body is symmetrical, so the limiting groove 1.1 can be designed as half of the cross-section of the reinforcing body. For example, if the cross-section is circular, the limiting groove 1.1 can be designed as a semicircle. The winding length of the precursor filament winding wheel 1 is designed according to the required length of the bundle of precursor filaments and the shape of the limiting groove 1.1. Figure 1 .

[0039] (2) Winding the bundle of precursor filaments. The precursor filaments 3 are wound tightly and without overlapping in the limiting groove 1.1 of the precursor filament winding wheel 1 through a precise winding device, forming a wound precursor filament 3.1, as shown in Figure 3 (a)-(b).

[0040] (3) Cutting the bundle of precursor filaments. The precursor filaments in the limiting groove 1.1 are cut according to the required length of the shaft, forming a bundle of precursor filaments A3.2, as shown in Figure 3 (c).

[0041] (4) Assembling the bundle of precursor filaments. The bundle of precursor filaments is spliced according to the cross-sectional size of the reinforcing body, such as splicing the bundle of precursor filaments A3.2 and the bundle of precursor filaments B3.3 into a bundle of precursor filaments A&B3.4, as shown in Figure 3 (d)-(e).

[0042] 2. Insertion process of the bundle of precursor filaments

[0043] The prepared bundle of precursor filaments A&B3.4 and the shaft body cover 4 are placed on the precursor filament roller pressing and advancing device. The outer contour between the counter-rotating roller pressing wheels 5 in the device is consistent with the cross-sectional shape and size of the bundle of precursor filaments A&B3.4. The device should have functions of roller pressing wheel 5 pressure adjustment and rotation advancement. The bundle of precursor filaments A&B3.4 is tightly fixed by using the roller pressing wheel 5. The shaft body cover 4 is horizontally arranged on the output end of the bundle of precursor filaments A&B3.4, and the center hole of the shaft body cover 4 is consistent with the shape and size of the bundle of precursor filaments A&B3.4. The bundle of precursor filaments A&B3.4 is inserted into the shaft body cover 4 from one end by rotating and advancing the roller pressing wheel 5 until the bundle of precursor filaments A&B3.4 reaches its predetermined position, as shown in Figure 3 (f).

[0044] 3. Preform sleeve assembly process

[0045] The two ends of the shaft sleeve 4 in which the precursor filaments A and B 3.4 are inserted are assembled with the sleeve end cap A 4.1 and the sleeve end cap B 4.2 respectively to form a preform sleeve, as shown in Figure 3 (g).

[0046] As shown in Figures 1-3 , the embodiment provides a preparation method of a SiC fiber reinforced metal matrix composite solid shaft preform, and the specific preparation method is as follows:

[0047] (1) The total amount of SiC fiber reinforced metal matrix composite precursor filaments is determined according to the reinforcement design requirements of the shaft part, wherein the SiC fiber reinforced metal matrix composite precursor filaments are composed of a metal coating deposited on the surface of SiC fibers, the volume fraction of SiC fibers is 20-80%, and the rest is the metal coating, which can be an aluminum alloy, a titanium alloy or a high-temperature alloy.

[0048] (2) The precursor filament winding wheel is designed and processed according to the information such as the material, the cross-sectional shape and size and the length of the reinforcement of the shaft part.

[0049] (3) The precursor filaments are closely arranged on the precursor filament winding wheel by using a precision winding device, and are fixed by using an organic binder (such as methyl methacrylate) or a clamp.

[0050] (4) The precursor filament bundle is cut and spliced according to the required length of the reinforcement in the shaft part to form a precursor filament bundle with the same cross section as the reinforcement, and is fixed by using an organic binder (such as methyl methacrylate) or a clamp.

[0051] (5) The prepared precursor filament bundle and the shaft sleeve are placed on the precursor filament roller pressing and advancing device, the precursor filament bundle is closely fixed by using a roller pressing wheel, and the precursor filament bundle is inserted into the inside of the shaft sleeve from one end of the shaft sleeve to the predetermined position of the precursor filament bundle by rotating and advancing the roller pressing wheel.

[0052] (6) The shaft sleeve in which the precursor filament bundle is inserted is assembled with the end caps. Thus, the preparation of the SiC fiber reinforced metal matrix composite solid shaft preform is completed.

[0053] The implementation results show that the precursor filament bundle prepared by winding, cutting and splicing is dense and has no interlacing; the limiting grooves of the winding wheel correspond to the cross sections of different reinforcements; the winding circumference of the winding wheel is designed according to the required length of the precursor filament bundle and the shape of the limiting groove; and the precursor filament bundle and the shaft sleeve are inserted and assembled by using the roller pressing and advancing device, which can effectively solve a series of technical problems such as bending, interlacing and loosening of the precursor filament bundle in the assembly process with the sleeve.

Claims

1. A method of making a SiC fiber reinforced metal matrix composite solid shaft preform, characterized by, It is prepared from SiC fiber reinforced metal matrix composite precursor tows, the precursor tows are inserted and the preform is assembled, and comprises the following steps: (1) The total amount of SiC fiber reinforced metal matrix composite precursor is determined according to the design requirements of the shaft reinforcement; (2) The precursor winding wheel is designed and processed according to the material, cross-sectional shape and size, and length information of the shaft reinforcement; (3) The precursor tows are closely arranged on the precursor winding wheel by using a precision winding device, and are fixed by using an organic binder or a clamp; (4) The precursor tows are cut and spliced according to the required length of the shaft reinforcement to form a precursor tow with the same cross-sectional shape as the reinforcement, and are fixed by using an organic binder or a clamp; (5) The prepared precursor tows and shaft sleeve are placed on the precursor roller pressing and advancing device, the precursor tows are tightly fixed by using a roller, the shaft sleeve is arranged horizontally on the output end of the precursor tows, the center hole of the shaft sleeve is consistent with the shape and size of the precursor tows, the precursor tows are inserted into the shaft sleeve from one end of the shaft sleeve by rotating the roller until the predetermined position of the precursor tows is reached; (6) The shaft sleeve with the inserted precursor tows is assembled with other parts to complete the preparation of the SiC fiber reinforced metal matrix composite shaft preform. The precursor tows insertion process is as follows: the prepared precursor tows and shaft sleeve are placed on the precursor roller pressing and advancing device, the precursor tows are tightly fixed by using a roller, the shaft sleeve is arranged horizontally on the output end of the precursor tows, the center hole of the shaft sleeve is consistent with the shape and size of the precursor tows, the precursor tows are inserted into the shaft sleeve from one end of the shaft sleeve by rotating the roller until the predetermined position of the precursor tows is reached; In the precursor roller pressing and advancing device, the outer contour of the counter-rotating roller is consistent with the cross-sectional shape and size of the precursor tows, and the device should have the functions of roller pressure adjustment and rotation advancement.

2. The method for preparing a solid shaft preform of SiC fiber-reinforced metal matrix composite material according to claim 1, characterized in that, The SiC fiber reinforced metal matrix composite precursor is composed of a metal coating deposited on the surface of SiC fiber, the volume fraction of SiC fiber is 20-80%, and the rest is metal coating, which is aluminum alloy, titanium alloy or high-temperature alloy.

3. The method for preparing a solid shaft preform of SiC fiber-reinforced metal matrix composite material according to claim 1, characterized in that, The precursor tow preparation process is as follows: (1) The precursor winding wheel is made, the outer periphery of the precursor winding wheel is provided with a limiting groove, and the precursor winding wheel is designed and processed according to the material, cross-sectional shape, size and length information of the composite shaft reinforcement; (2) The precursor tows are wound by using a precision winding device to tightly and non-intersectingly wind the precursor tows; (3) The precursor tows are cut according to the required length of the shaft to form the precursor tows; (4) The precursor tows are spliced according to the cross-sectional size of the reinforcement to form an integrated or multi-body precursor tow.

4. The method for preparing a solid shaft preform of SiC fiber-reinforced metal matrix composite material according to claim 3, characterized in that, The winding limiting groove in the precursor winding wheel is designed according to the cross-sectional shape and size of the reinforcement, the cross-section of the reinforcement is a circular symmetric structure, the winding limiting groove is designed as a semicircle of one-half of the cross-section of the reinforcement, and the winding circumference of the precursor winding wheel is designed according to the required length of the precursor tows and the shape of the limiting groove.

5. The method for preparing a solid shaft preform of SiC fiber-reinforced metal matrix composite material according to claim 1, characterized in that, The preform sleeve assembly process is as follows: the shaft sleeve with the inserted precursor tows is assembled with the sleeve end caps to form a preform sleeve.

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