CN115194294B - Aluminum steel composite material and arc additive preparation method thereof - Google Patents
Aluminum steel composite material and arc additive preparation method thereof Download PDFInfo
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- CN115194294B CN115194294B CN202210628818.2A CN202210628818A CN115194294B CN 115194294 B CN115194294 B CN 115194294B CN 202210628818 A CN202210628818 A CN 202210628818A CN 115194294 B CN115194294 B CN 115194294B
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 77
- 239000010959 steel Substances 0.000 title claims abstract description 77
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 36
- 239000002131 composite material Substances 0.000 title claims abstract description 34
- 239000000654 additive Substances 0.000 title claims abstract description 31
- 230000000996 additive effect Effects 0.000 title claims abstract description 31
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 31
- 238000002360 preparation method Methods 0.000 title claims abstract description 13
- YVIMHTIMVIIXBQ-UHFFFAOYSA-N [SnH3][Al] Chemical compound [SnH3][Al] YVIMHTIMVIIXBQ-UHFFFAOYSA-N 0.000 claims abstract description 33
- 229910001128 Sn alloy Inorganic materials 0.000 claims abstract description 29
- 239000000463 material Substances 0.000 claims abstract description 26
- 229910000838 Al alloy Inorganic materials 0.000 claims abstract description 15
- 238000000034 method Methods 0.000 claims description 27
- 241000357293 Leptobrama muelleri Species 0.000 claims description 16
- 238000003466 welding Methods 0.000 claims description 14
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 12
- 239000000843 powder Substances 0.000 claims description 12
- 230000008569 process Effects 0.000 claims description 12
- 229910052718 tin Inorganic materials 0.000 claims description 9
- 229910052802 copper Inorganic materials 0.000 claims description 8
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 6
- 229910052786 argon Inorganic materials 0.000 claims description 6
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims description 6
- 238000005096 rolling process Methods 0.000 claims description 6
- 238000010891 electric arc Methods 0.000 claims description 4
- 238000003892 spreading Methods 0.000 claims description 4
- 230000007480 spreading Effects 0.000 claims description 4
- 230000009471 action Effects 0.000 claims description 2
- 238000004140 cleaning Methods 0.000 claims description 2
- 238000002844 melting Methods 0.000 claims description 2
- 230000008018 melting Effects 0.000 claims description 2
- 238000002156 mixing Methods 0.000 claims description 2
- 238000005498 polishing Methods 0.000 claims description 2
- 239000001996 bearing alloy Substances 0.000 abstract description 8
- 238000005516 engineering process Methods 0.000 abstract description 8
- 238000013329 compounding Methods 0.000 description 10
- 238000004519 manufacturing process Methods 0.000 description 6
- 239000007790 solid phase Substances 0.000 description 6
- 229910045601 alloy Inorganic materials 0.000 description 5
- 239000000956 alloy Substances 0.000 description 5
- 229910000765 intermetallic Inorganic materials 0.000 description 4
- 239000007791 liquid phase Substances 0.000 description 4
- 239000000758 substrate Substances 0.000 description 4
- 229910015372 FeAl Inorganic materials 0.000 description 3
- 230000002411 adverse Effects 0.000 description 3
- 230000008021 deposition Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000005484 gravity Effects 0.000 description 3
- 239000011159 matrix material Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 238000005204 segregation Methods 0.000 description 3
- 229910000851 Alloy steel Inorganic materials 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000010924 continuous production Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 238000010907 mechanical stirring Methods 0.000 description 2
- 239000012071 phase Substances 0.000 description 2
- 238000005476 soldering Methods 0.000 description 2
- -1 FeAl 2 Chemical class 0.000 description 1
- 230000000573 anti-seizure effect Effects 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000009734 composite fabrication Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000005137 deposition process Methods 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 229910001338 liquidmetal Inorganic materials 0.000 description 1
- 238000004021 metal welding Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
-
- 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
- B23K9/00—Arc welding or cutting
- B23K9/04—Welding for other purposes than joining, e.g. built-up welding
- B23K9/042—Built-up welding on planar surfaces
-
- 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
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/24—Selection of soldering or welding materials proper
- B23K35/28—Selection of soldering or welding materials proper with the principal constituent melting at less than 950 degrees C
- B23K35/286—Al as the principal constituent
- B23K35/288—Al as the principal constituent with Sn or Zn
-
- 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
- B23K9/00—Arc welding or cutting
- B23K9/16—Arc welding or cutting making use of shielding gas
-
- 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
- B23K9/00—Arc welding or cutting
- B23K9/235—Preliminary treatment
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Pressure Welding/Diffusion-Bonding (AREA)
Abstract
The invention discloses an aluminum steel composite material and an arc additive preparation method thereof. The material consists of an aluminum alloy layer and a steel layer, wherein the aluminum alloy layer comprises the following components in percentage by weight: 20 to 23wt.% of Sn,0.75 to 0.85wt.% of Cu,0.05 to 0.06wt.% of Si, and the balance being Al. The preparation process of the material comprises the following steps: (1) preparing an aluminum-tin alloy flux-cored wire. (2) And (3) arc-adding the aluminum-tin alloy flux-cored wire to the surface of the steel plate to obtain the aluminum/steel composite material. By adopting the technical scheme, the CMT arc additive technology is used as a novel composite technology of bearing alloy/steel, and the prepared material has high bonding strength, uniform structure, excellent antifriction and wear resistance and high bearing performance.
Description
Technical Field
The invention relates to an aluminum steel composite material and a preparation method thereof, in particular to an aluminum steel composite material and an arc additive preparation method thereof.
Background
The aluminum-based bearing alloy has higher fatigue performance, stronger bearing capacity, good adaptability, embedding property, wear resistance, anti-seizure capacity and corrosion resistance, and is a main manufacturing material of the sliding bearing of the light and medium-load internal combustion engine. Among them, al-Sn bearing alloys are most widely used. However, the existing methods for compounding the bearing alloy and the steel back have the defect that the method is difficult to avoid: the bimetal interface manufactured by the solid-solid phase compounding method is basically mechanically combined, the bonding strength is low, and the service life of the finished product is adversely affected; the solid-liquid phase compounding method is difficult to solve the problem of specific gravity segregation, and influences the friction performance of a bearing sample; the semi-solid phase compounding requires procedures of soldering flux, surface preheating, mechanical stirring and the like, is complex to operate and is difficult to continuously produce in large batches. So the prior art lacks a bearing alloy compounding method which can meet the requirements of high bonding strength, uniform tissue components and high production efficiency.
The CMT arc material-increasing technology has flexible production, high product precision and continuous production; the high-temperature liquid phase exists in the forming process, so that metallurgical bonding can be generated; the alloy has the advantages of low heat input, no splashing and the like, and is very suitable for low-melting-point metals such as aluminum alloy and the like. At present, research on dissimilar metal welding of CMT aluminum steel focuses on an intermetallic compound layer influencing bonding performance, and inhibition effect of elements such as Si, zn and the like on growth of the intermetallic compound layer is also researched. But these studies have mainly aimed at joining steel and aluminum plates to obtain a stronger joint; and the effect on the bonding performance for the elements in the alloy such as Sn added is left blank. In other words, CMT arc additive has not been used in the composite fabrication of aluminum-based bearing alloys-steels.
Disclosure of Invention
The invention aims to: the invention provides an aluminum steel composite material with high bonding strength, good antifriction and wear-resisting properties and bearing properties.
The invention further aims to provide an arc additive manufacturing method of the aluminum steel composite material.
The technical scheme is as follows: the aluminum-steel composite material provided by the invention comprises a steel layer and an aluminum-tin alloy layer covered on the steel layer, and is characterized in that: a Sn-containing layer is present in addition to the Fe-Al phase at the bonding interface of the steel layer and the aluminum-tin alloy layer, the aluminum alloy comprising: al, sn, cu and Si, wherein the weight percentages of the components are as follows: 20 to 23wt.% of Sn,0.75 to 0.85wt.% of Cu,0.05 to 0.06wt.% of Si, and the balance being Al; the aluminum-tin alloy layer is an aluminum-tin alloy flux-cored wire prepared by mixing the components according to the proportion, and the aluminum-tin alloy flux-cored wire is subjected to arc material increase to the surface of the steel plate through a CMT digital inverter welding power supply.
Further, the process parameters of the arc additive are as follows: the current is 65A-95A, the voltage is 100% avp, the argon flow is 18-20L/min, the swing amplitude is 8mm, the additive speed is 7-10 cm/min, and the swing frequency is 1.0-4.0 Hz.
Further, the preparation process of the aluminum-tin alloy flux-cored wire comprises the following steps: the 4043 aluminum alloy is rolled into a U-shaped section shape, then 800 mesh high-purity Sn powder and 1000 mesh high-purity Cu powder which are prepared according to the dosage are filled into a U-shaped belt material, the materials are rolled by a rolling mill, and finally the flux-cored wire with the components of 20 to 23 weight percent of Sn,0.75 to 0.85 weight percent of Cu,0.05 to 0.06 weight percent of Si and the balance of Al and the diameter of 1.6mm is manufactured through drawing.
The arc additive preparation method of the aluminum steel composite material comprises the following steps:
(1) Firstly, cleaning the steel back, polishing the surface to remove rust, wiping the surface with alcohol, airing, and preheating the steel plate to 90-120 ℃;
(2) And (3) adopting a CMT digital inverter welding power supply to perform arc material adding on the aluminum-tin alloy flux-cored wire to the surface of the steel plate and obtain the aluminum-steel composite material with Sn-containing layers distributed on the aluminum-steel bonding interface.
Arc material adding process: spreading an aluminum-tin alloy flux-cored wire from one side to the other side of the surface of a steel plate, connecting the aluminum-tin alloy flux-cored wire with a positive electrode of a power supply, connecting the steel plate with a negative electrode of the power supply, generating an electric arc between the two electrodes after electrifying, melting the wire under the action of electric arc heat to form molten drops, and spreading the molten drops on the steel plate to form an additive belt, thereby obtaining the aluminum-steel composite material with Sn-containing layers distributed on an aluminum-steel bonding interface.
The current of the arc additive process is preferably 75A-85A, the voltage is preferably 100% avp, and the swing frequency is preferably 1.5-2.5 Hz.
The aluminum steel composite material is applied to wear-resistant materials of sliding friction parts of light and medium load internal combustion engines.
In order to form an Sn-containing layer on a bonding interface of a steel-aluminum layer in an aluminum-steel composite material, the aluminum-steel composite material has good friction and wear performance, and the bonding strength between the steel-aluminum layers in the aluminum-steel composite material is improved, the following aluminum alloy welding wires are adopted in the invention, namely:
an aluminum-based alloy welding wire, comprising: al, si and Cu, which is characterized by further comprising Sn, wherein the weight percentages of the components are as follows: 20-23wt.% Sn,0.75-0.85wt.% Cu,0.05-0.06wt.% Si, the balance being Al.
The invention solves the problems of low aluminum steel bonding strength, specific gravity segregation of alloy structures and difficult efficient production in the traditional aluminum-based bearing alloy-steel composite process. The CMT arc material-increasing technology is firstly applied to the manufacture of aluminum steel bearing bush strips, and the aluminum/steel composite material and the arc material-increasing preparation method thereof are provided, so that the aluminum/steel composite strip with high bonding strength, uniform structure, good antifriction and wear-resisting performances and distinct and unmixed aluminum alloy and steel structure is obtained.
In particular, the method comprises the steps of,
1. the CMT arc additive technology is successfully applied to the compounding of aluminum-steel bearing strips, and a novel aluminum-steel dissimilar metal compounding method is obtained.
The traditional aluminum-based bearing alloy strip composite aluminum alloy-steel backing generally adopts a solid-solid phase composite method, a solid-liquid phase composite method and a semi-solid phase composite method. The bimetal interface manufactured by the solid-solid phase compounding method is basically mechanically combined, the bonding strength is low, and the service life of the finished product is adversely affected; the solid-liquid phase compounding method is difficult to solve the problem of specific gravity segregation, and influences the friction performance of a bearing sample; the semi-solid phase compounding requires procedures of soldering flux, surface preheating, mechanical stirring and the like, is complex to operate and is difficult to continuously produce in large batches. The existing aluminum-steel composite material preparation method has the defect that the existing aluminum-steel composite material preparation method is difficult to overcome
The physical properties of aluminum and steel are greatly different, and high-quality welding is difficult to finish. Mainly because the density, linear expansion coefficient and thermal conductivity difference of the aluminum alloy and the steel are large, stress concentration is easy to occur at the welding seam, and crack initiation and expansion are caused; and Al and Fe interdiffuse and react readily at the interface to form hard and brittle Fe-Al compounds, e.g. FeAl 2 、FeAl 3 、FeAl、Fe 2 Al 5 And the like, the intermetallic compound layers have large thickness and have adverse effects on mechanical properties.
The method successfully realizes arc deposition of aluminum and steel, improves the bonding performance of aluminum-steel composite materials, obtains uniform and non-segregated alloy structures, has less operation flow, and can meet the requirements of high-efficiency continuous production.
2. To improve aluminum matrix compositesThe invention prepares the Sn-containing aluminum alloy welding wire with the function of serving as a friction-reducing and wear-resisting material composed of soft particles and a hard Al matrix to meet the requirements of bearing alloy on friction and wear performance, and forming a Sn-containing layer at the interface of aluminum and steel to inhibit the growth of intermetallic compound layers, especially Fe 2 Al 5 The phases act as a suppression, thereby improving the bonding strength of the aluminum steel composite (fig. 1). The present invention tested the bond strength, which increased from 43.6MPa to 113.8MPa (fig. 2).
In the arc deposition process, the flux-cored wire absorbs the arc and is converted into molten drops to be transferred to the steel plate, wherein Sn and Al are not mutually dissolved, the Sn has a density higher than that of Al, and the deposition on the surface of the steel back inhibits the reaction of Fe and Al, so that Fe is reduced 2 Al 5 Thereby limiting the growth of the intermetallic layer. As the droplet cools, the Sn solidifies on the interfacial layer to form a Sn-containing layer.
According to the arc material-increasing process disclosed by the invention, the heat input is easier to control through the low-current (65A-95A) arc material-increasing process of the CMT cold metal transition technology, so that the average heat input of a welding bead is more uniform and controllable, and a compact uniform and fine grain structure (shown in figure 3) is obtained through arc deposition, so that the material-increasing layer has good antifriction and wear-resisting properties and bearing properties. Meanwhile, matching among the current magnitude, the preheating temperature, the swing frequency, the swing amplitude and the pass lap joint amount solves the problems that the fluidity of liquid metal is poor and the material-adding layer is difficult to uniformly form, and the material-adding layer with good forming performance is obtained (figure 4).
The beneficial effects are that: compared with the prior art, the invention has the following advantages: the CMT arc additive technology is used as a novel composite technology of bearing alloy/steel, and the prepared material has high bonding strength, uniform structure, excellent antifriction and wear resistance and high bearing performance.
Drawings
FIG. 1 is an Sn-containing layer at the aluminum/steel junction;
the bonding strength of the aluminum alloy layers and the steel matrix of FIG. 2 for different currents;
FIG. 3 additive layer internal tissue;
fig. 4 additive layer appearance.
Detailed Description
Example 1:
the arc additive process comprises the following steps:
(1) Firstly, preparing an aluminum-tin alloy flux-cored wire: the 4043 aluminum alloy is rolled into a U-shaped section shape, then 800 mesh high-purity Sn powder and 1000 mesh high-purity Cu powder which are prepared according to the dosage are filled into a U-shaped belt material, the materials are rolled by a rolling mill, and finally the flux-cored wire with the components of 20 to 23 weight percent of Sn,0.75 to 0.85 weight percent of Cu,0.05 to 0.06 weight percent of Si and the balance of Al and the diameter of 1.6mm is manufactured through drawing.
(2) Then the steel back is treated cleanly, the surface of the steel back is polished by a grinder to remove rust, the surface is wiped by alcohol, the steel back is fixed on a workbench after being dried, and the steel plate is preheated to 100 ℃;
(3) And then arc-adding the aluminum-tin alloy flux-cored wire to the surface of the steel plate by a CMT digital inverter welding power supply. The bonding wire is perpendicular to the substrate. The arc material-increasing technological parameters are as follows: the current is 75A, the voltage is 100% avp, the argon flow is 20L/min, the swing amplitude is 8mm, the additive speed is 10cm/min, and the swing frequency is 2.5Hz. The novel aluminum tin additive layer has general forming performance and bonding strength of 55.1MPa.
Example 2:
the arc additive process comprises the following steps:
(1) Firstly, preparing an aluminum-tin alloy flux-cored wire: the 4043 aluminum alloy is rolled into a U-shaped section shape, then 800 mesh high-purity Sn powder and 1000 mesh high-purity Cu powder which are prepared according to the dosage are filled into a U-shaped belt material, the materials are rolled by a rolling mill, and finally the flux-cored wire with the components of 20 to 23 weight percent of Sn,0.75 to 0.85 weight percent of Cu,0.05 to 0.06 weight percent of Si and the balance of Al and the diameter of 1.6mm is manufactured through drawing.
(2) Then the steel back is treated cleanly, the surface of the steel back is polished by a grinder to remove rust, the surface is wiped by alcohol, the steel back is fixed on a workbench after being dried, and the steel plate is preheated to 100 ℃;
(3) And then arc-adding the aluminum-tin alloy flux-cored wire to the surface of the steel plate by a CMT digital inverter welding power supply. The bonding wire is perpendicular to the substrate. The arc material-increasing technological parameters are as follows: the current is 80A, the voltage is 100% avp, the argon flow is 20L/min, the swing amplitude is 8mm, the additive speed is 10cm/min, and the swing frequency is 2.5Hz. The novel aluminum tin additive layer has good forming performance and bonding strength of 95.7MPa.
Example 3:
the arc additive process comprises the following steps:
(1) Firstly, preparing an aluminum-tin alloy flux-cored wire: the 4043 aluminum alloy is rolled into a U-shaped section shape, then 800 mesh high-purity Sn powder and 1000 mesh high-purity Cu powder which are prepared according to the dosage are filled into a U-shaped belt material, the materials are rolled by a rolling mill, and finally the flux-cored wire with the components of 20 to 23 weight percent of Sn,0.75 to 0.85 weight percent of Cu,0.05 to 0.06 weight percent of Si and the balance of Al and the diameter of 1.6mm is manufactured through drawing.
(2) Then the steel back is treated cleanly, the surface of the steel back is polished by a grinder to remove rust, the surface is wiped by alcohol, the steel back is fixed on a workbench after being dried, and the steel plate is preheated to 100 ℃;
(3) And then arc-adding the aluminum-tin alloy flux-cored wire to the surface of the steel plate by a CMT digital inverter welding power supply. The bonding wire is perpendicular to the substrate. The arc material-increasing technological parameters are as follows: the current is 85A, the voltage is 100% avp, the argon flow is 20L/min, the swing amplitude is 8mm, the additive speed is 10cm/min, and the swing frequency is 2.5Hz. The novel aluminum tin additive layer has good forming performance and the bonding strength is 113.8MPa.
Example 4:
the arc additive process comprises the following steps:
(1) Firstly, preparing an aluminum-tin alloy flux-cored wire: the 4043 aluminum alloy is rolled into a U-shaped section shape, then 800 mesh high-purity Sn powder and 1000 mesh high-purity Cu powder which are prepared according to the dosage are filled into a U-shaped belt material, the materials are rolled by a rolling mill, and finally the flux-cored wire with the components of 20 to 23 weight percent of Sn,0.75 to 0.85 weight percent of Cu,0.05 to 0.06 weight percent of Si and the balance of Al and the diameter of 1.6mm is manufactured through drawing.
(2) Then the steel back is treated cleanly, the surface of the steel back is polished by a grinder to remove rust, the surface is wiped by alcohol, the steel back is fixed on a workbench after being dried, and the steel plate is preheated to 100 ℃;
(3) And then arc-adding the aluminum-tin alloy flux-cored wire to the surface of the steel plate by a CMT digital inverter welding power supply. The bonding wire is perpendicular to the substrate. The arc material-increasing technological parameters are as follows: the current is 90A, the voltage is 100% avp, the argon flow is 20L/min, the swing amplitude is 8mm, the additive speed is 10cm/min, and the swing frequency is 2.5Hz. The novel aluminum tin additive layer has general forming performance and bonding strength of 43.6MPa.
Claims (2)
1. An aluminum steel composite material, includes steel layer and covers the aluminium tin alloy layer on the steel layer, its characterized in that: a Sn-containing layer is present at the bonding interface of the steel layer and the aluminum-tin alloy layer in addition to the Fe-Al phase, the aluminum-tin alloy layer comprising: al, sn, cu and Si, wherein the weight percentages of the components are as follows: 20 to 23wt.% of Sn,0.75 to 0.85wt.% of Cu,0.05 to 0.06wt.% of Si, and the balance of Al; the aluminum-tin alloy layer is an aluminum-tin alloy flux-cored wire prepared by mixing the components according to the proportion, and the aluminum-tin alloy flux-cored wire is subjected to arc material addition to the surface of the steel plate through a CMT digital inverter welding power supply;
the arc additive preparation method of the aluminum steel composite material comprises the following steps:
(1) Firstly, cleaning a steel back, polishing the surface to remove rust, wiping the surface with alcohol, airing, and preheating a steel plate to 90-120 ℃;
(2) Adopting a CMT digital inverter welding power supply, carrying out arc material adding on an aluminum-tin alloy flux-cored wire to the surface of a steel plate and obtaining an aluminum-steel composite material with Sn-containing layers distributed on an aluminum-steel bonding interface;
arc material adding process: spreading an aluminum-tin alloy flux-cored wire from one side to the other side of the surface of a steel plate, connecting the aluminum-tin alloy flux-cored wire with a positive electrode of a power supply, connecting the steel plate with a negative electrode of the power supply, generating an electric arc between the two electrodes after the steel plate is electrified, melting the wire under the action of electric arc heat to form molten drops, and spreading the molten drops on the steel plate to form an additive belt to obtain an aluminum-steel composite material with Sn-containing layers distributed on an aluminum-steel bonding interface;
the technological parameters of the arc material increase are as follows: the current 65A-95A, the voltage 100% avp, the argon flow rate 18-20L/min, the swing amplitude 8mm, the additive speed 7-10 cm/min and the swing frequency 1.0-4.0 Hz.
2. The aluminum steel composite material according to claim 1, wherein: the preparation process of the aluminum-tin alloy flux-cored wire comprises the following steps: the 4043 aluminum alloy is rolled into a U-shaped section shape, then 800-mesh high-purity Sn powder and 1000-mesh high-purity Cu powder which are prepared according to the dosage are filled into a U-shaped belt material, the materials are rolled by a rolling mill, and finally, a flux-cored wire with the components of 20-23wt.% Sn,0.75-0.85wt.% Cu,0.05-0.06wt.% Si and the balance Al and the diameter of 1.6mm is manufactured through drawing.
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| CN115612895B (en) * | 2022-10-26 | 2023-10-03 | 苏州虎伏新材料科技有限公司 | Aluminum/steel layered composite bimetal sliding bearing material, preparation process and application |
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| JP2014214827A (en) * | 2013-04-26 | 2014-11-17 | 大豊工業株式会社 | Aluminum alloy slide bearing and manufacturing method |
| CN104589726A (en) * | 2014-12-01 | 2015-05-06 | 华南理工大学 | Multiphase dual-scale structural aluminum-tin based composite bearing bush strip and preparation method thereof |
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