CN111250849B - Manufacturing method of steel-aluminum material connecting piece and steel-aluminum material connecting piece - Google Patents
Manufacturing method of steel-aluminum material connecting piece and steel-aluminum material connecting piece Download PDFInfo
- Publication number
- CN111250849B CN111250849B CN202010062319.2A CN202010062319A CN111250849B CN 111250849 B CN111250849 B CN 111250849B CN 202010062319 A CN202010062319 A CN 202010062319A CN 111250849 B CN111250849 B CN 111250849B
- Authority
- CN
- China
- Prior art keywords
- steel
- aluminum
- plate
- welding
- ring
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
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
- B23K11/00—Resistance welding; Severing by resistance heating
- B23K11/10—Spot welding; Stitch welding
- B23K11/11—Spot welding
-
- 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
- B23K11/00—Resistance welding; Severing by resistance heating
- B23K11/34—Preliminary treatment
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/48—Ferrous alloys, e.g. steel alloys containing chromium with nickel with niobium or tantalum
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/54—Ferrous alloys, e.g. steel alloys containing chromium with nickel with boron
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/58—Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.5% by weight of manganese
-
- 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
- B23K2103/00—Materials to be soldered, welded or cut
- B23K2103/18—Dissimilar materials
- B23K2103/20—Ferrous alloys and aluminium or alloys thereof
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Resistance Welding (AREA)
Abstract
The invention provides a manufacturing method of a steel-aluminum material connecting piece and the steel-aluminum material connecting piece, and belongs to the field of dissimilar metal connection. The manufacturing method comprises the following steps: stacking an aluminum plate on a steel plate; preparing a steel compression ring, wherein the height of the steel compression ring is not less than the thickness of the aluminum plate; placing a steel compression ring at a preset position on the top surface of the aluminum plate, wherein the axis of the steel compression ring is vertical to the surface of the aluminum plate; applying first resistance spot welding between the top surface of the steel compression ring and the bottom surface of the steel plate according to first welding parameters, so that the steel plate and the steel compression ring are solid phases while the aluminum plate is locally molten; and when the steel pressure ring is pressed through the aluminum plate and is in contact with the top surface of the steel plate, applying second resistance spot welding between the top surface of the steel pressure ring and the bottom surface of the steel plate according to second welding parameters. The manufacturing method of the steel-aluminum material connecting piece can realize efficient, quick and stable connection of the steel-aluminum materials and save the cost of connecting the steel-aluminum materials.
Description
Technical Field
The invention relates to the field of dissimilar metal connection, in particular to a manufacturing method of a steel-aluminum material connecting piece and the steel-aluminum material connecting piece.
Background
The light weight of the automobile body becomes the inevitable trend of the development of the automobile manufacturing technology, the most direct and effective method for reducing the automobile quality is to use a large amount of light weight materials in the automobile body manufacturing process, and the aluminum alloy is one of the light weight materials for the automobile with the greatest application prospect. Compared with steel materials, the aluminum alloy can reduce the weight of the car body by 30-40%. However, the welding of aluminum alloy, especially the connection of steel-aluminum mixed material, has a great problem of poor weldability. Therefore, the steel-aluminum hybrid connection technology is one of the important concerns in the development of light weight of automobiles and is a technical difficulty which must be overcome for realizing aluminum automobile bodies.
The following problems mainly exist in the connection of steel-aluminum mixed materials:
(1) because the melting point of steel is higher than that of aluminum, in the welding process, when the aluminum is completely melted into liquid, the steel is still in a solid state, the density difference between the two is large, and after the steel is completely melted, the liquid aluminum floats on the molten steel, and after cooling and crystallization, the welding seam components are not uniform, so that the performance of a welding joint is reduced.
(2) During the welding process of aluminum and its alloy and steel, a refractory oxide film is formed on the surface of the aluminum base metal, and the oxide film can also be present on the surface of the molten pool, the higher the temperature of the molten pool is, the thicker the oxide film on the surface is, the existence of the oxide film obstructs the combination of liquid metal, and slag inclusion is easily generated on the welding line.
(3) The heat conductivity and linear expansion coefficient of aluminum and aluminum alloy are greatly different from those of steel, the welded joint after welding is seriously deformed, and large residual stress exists, so that cracks are easily generated.
(4) The solid solubility of iron in aluminum is almost zero, and various hard and brittle intermetallic compounds can be generated between the iron and the aluminum, so that the steel-aluminum interface has extremely strong brittleness, the mechanical property of a welding joint is reduced, and the strength requirement of an aluminum vehicle body cannot be met.
At present, in order to realize effective connection of steel-aluminum mixed materials in the vehicle manufacturing process, self-piercing riveting and rotary tapping riveting processes are mainly used. In addition, friction stir spot welding, which is now under laboratory research, is also one of the effective joining processes that may be achieved for steel-aluminum hybrid materials.
Due to the difference in the physicochemical properties of steel and aluminum materials, and the ease of forming metal compounds at the steel-aluminum material interface, the two materials cannot be permanently joined by the resistance welding process. The conventional connection process described above has significant and unavoidable drawbacks. There are roughly the following significant drawbacks:
(1) the cost is high. The welding cost of the car body is far higher than the current common resistance spot welding process cost due to the fact that equipment and a system in the prior art are complex, the occupied area is large, and special auxiliary parts (rivets) or easily-damaged parts (stirring heads) can be used.
(2) Has stricter structural design requirements and material matching principles. The prior art has definite technical requirements on the design of a welding structure, so that the application of the technical schemes has great limitation, and partial structures can not be welded or the structure design of the prior structure needs to be carried out again. Meanwhile, the prior art scheme is matched with a strict matching principle for the materials, and the application range of the prior art scheme is further limited.
(3) The welding process is difficult to realize informatization control. In the prior art, only fixed welding process specifications can be adopted, and functions of real-time information acquisition, automatic optimization of a welding process and the like cannot be realized by adopting an informatization technology.
Therefore, the simple and efficient resistance spot welding method capable of effectively avoiding the defects is one of important ways for realizing efficient, quick, stable and intelligent connection of the steel-aluminum material, and has very important practical significance for industrial realization of the aluminum alloy vehicle body.
Disclosure of Invention
The invention aims to provide a manufacturing method of a steel-aluminum material connecting piece, which can realize efficient, quick and stable connection of steel-aluminum materials.
Another object of the invention is to save the cost of connecting steel and aluminium materials.
It is a further object of the present invention to facilitate the informatization and automation of welding of steel and aluminum materials.
Particularly, the invention provides a manufacturing method of a steel-aluminum material connecting piece, which is used for connecting an aluminum plate and a steel plate and comprises the following steps:
stacking the aluminum plate on the steel plate;
preparing a steel compression ring, wherein the height of the steel compression ring is not less than the thickness of the aluminum plate;
placing the steel compression ring at a preset position on the top surface of the aluminum plate, wherein the axis of the steel compression ring is perpendicular to the surface of the aluminum plate;
applying first resistance spot welding between the top surface of the steel compression ring and the bottom surface of the steel plate according to first welding parameters, so that the aluminum plate is locally molten while the steel plate and the steel compression ring are in a solid phase;
the steel clamping ring is pressed through the aluminum plate and the top surface of the steel plate is contacted, second resistance spot welding is applied between the top surface of the steel clamping ring and the bottom surface of the steel plate according to second welding parameters, and therefore a connecting joint with preset mechanical properties is formed between the aluminum plate and the steel clamping ring.
Optionally, the aluminium sheet is made of pure aluminium or an aluminium alloy material.
Optionally, the steel pressure ring is made of alloy steel or stainless steel.
Optionally, the height of the steel pressure ring is less than the smaller of 1.5T1 and T1+10mm, wherein T1 is the thickness of the aluminum plate.
Optionally, the steel pressure ring has a thickness of 0.5T1-2T 1.
Optionally, the yield strength of the steel compression ring is 250-800 MPa, the tensile strength is 280-1280 MPa, the elongation is 5-40%, and the Vickers hardness is larger than or equal to 150.
Optionally, applying a first resistance spot weld between the top surface of the steel pressure ring and the bottom surface of the steel plate with a first welding parameter comprises:
and applying resistance spot welding with the welding pressure of 0.5-4kN, the welding current of 5-15kA and the holding time of 5-3000ms between the top surface of the steel pressure ring and the bottom surface of the steel plate.
Optionally, applying a second resistance spot weld between the top surface of the steel pressure ring and the bottom surface of the steel plate with a second welding parameter, comprising:
and applying resistance spot welding with the welding pressure of 2-10kN, the welding current of 5-15kA and the holding time of 10-1000ms between the top surface of the steel pressure ring and the bottom surface of the steel plate.
Optionally, the preset mechanical properties include a tensile strength of not less than 1.8kN, a shear strength of not less than 2.5kN, and a maximum torque of not less than 6N m.
Particularly, the invention also provides a steel-aluminum material connecting piece which is manufactured by the manufacturing method of any one of the steel-aluminum material connecting pieces.
The invention skillfully adopts the melting point temperature difference and the physical and chemical property difference of the steel and the aluminum, realizes welding in the semi-solid state of the molten pool, namely, presses the steel compression ring when the two metals are respectively in a solid phase and a liquid phase (a solid-liquid two-phase coexisting state). And then the resistance spot welding of the steel compression ring and the steel plate is jointed to form the effect similar to riveting, so that the aluminum plate is fixed on the steel plate, and the connection of the steel-aluminum dissimilar materials is indirectly realized. The mode of adopting the additional connecting piece realizes the quick, efficient and stable connection of the steel and aluminum materials.
Further, because the common resistance spot welding process for welding the vehicle body is mature in application, the current vehicle body welding structure design is based on the resistance spot welding process. The invention creatively adopts a new additional connecting piece to transplant the resistance spot welding process to the connection of the steel-aluminum dissimilar materials, so that the connection of the steel-aluminum dissimilar materials by the commonly used resistance spot welding equipment at present becomes practical. And the additional connecting piece (steel compression ring) is low in cost, simple in structure and free of huge cost increase, and has a strong cost advantage compared with processes such as rotary tapping riveting and self-piercing riveting. And the mode of resistance spot welding easily realizes electrical control, easily realizes the information and the automation of welding.
The above and other objects, advantages and features of the present invention will become more apparent to those skilled in the art from the following detailed description of specific embodiments thereof, taken in conjunction with the accompanying drawings.
Drawings
Some specific embodiments of the invention will be described in detail hereinafter, by way of illustration and not limitation, with reference to the accompanying drawings. The same reference numbers in the drawings identify the same or similar elements or components. Those skilled in the art will appreciate that the drawings are not necessarily drawn to scale. In the drawings:
FIG. 1 is a flow chart of a method of making a steel-aluminum material connection according to one embodiment of the present invention;
fig. 2 is a process flow diagram of a method for manufacturing a steel-aluminum material connector according to an embodiment of the invention.
Detailed Description
Fig. 1 is a flow chart of a method for manufacturing a steel-aluminum material connector according to an embodiment of the invention. The invention provides a manufacturing method of a steel-aluminum material connecting piece, which is used for connecting an aluminum plate 10 and a steel plate 20. As shown in fig. 1, in one embodiment, the fabrication method may generally include the steps of:
s10: the aluminum plate 10 is stacked on the steel plate 20. That is, the bottom surface of the aluminum material plate 10 is in contact with the top surface of the steel material plate 20, and the aluminum material plate 10 and the steel material plate 20 are both flat plates and are bonded without a gap therebetween.
S20: a steel pressing ring 30 is prepared, the height of which is not less than the thickness of the aluminum plate 10.
S30: and placing a steel pressing ring 30 at a preset position on the top surface of the aluminum material plate 10, wherein the axis of the steel pressing ring 30 is perpendicular to the surface of the aluminum material plate 10. The preset position here is a position to be welded of the aluminum material plate 10 and the steel material plate 20.
S40: a first resistance spot weld is applied between the top surface of the steel pressure ring 30 and the bottom surface of the steel plate 20 with first welding parameters so that the aluminum plate 10 is locally melted while the steel plate 20 and the steel pressure ring 30 are in a solid phase. In this process, the welding pool is in a state of coexisting solid and liquid phases, and the pressure applied to the top surface of the steel pressing ring 30 causes the steel pressing ring 30 to slowly penetrate the molten aluminum material plate 10.
S50: when the steel pressure ring penetrates through the aluminum plate 10 and contacts with the top surface of the steel plate 20, second resistance spot welding is applied between the top surface of the steel pressure ring 30 and the bottom surface of the steel plate 20 according to second welding parameters, so that a connecting joint with preset mechanical properties is formed among the aluminum plate 10, the steel pressure ring 30 and the steel plate 20. Optionally, the preset mechanical properties include a tensile strength of not less than 1.8kN, a shear strength of not less than 2.5kN, and a maximum torque of not less than 6N m.
In the embodiment, the melting point temperature difference and the physical and chemical property difference of the steel and aluminum are skillfully adopted, so that the welding is realized when the molten pool is in a semi-solid state, namely, the steel compression ring 30 is pressed in when the two metals are respectively in a solid phase and a liquid phase (a solid-liquid two-phase coexisting state). And then the steel press ring 30 and the steel plate 20 are jointed by resistance spot welding to form the effect similar to riveting, so that the aluminum plate 10 is fixed on the steel plate 20, and the connection of steel and aluminum dissimilar materials is indirectly realized. The mode of adopting the additional connecting piece realizes the quick, efficient and stable connection of the steel and aluminum materials.
Further, because the common resistance spot welding process for welding the vehicle body is mature in application, the current vehicle body welding structure design is based on the resistance spot welding process. The invention creatively adopts a new additional connecting piece to transplant the resistance spot welding process to the connection of the steel-aluminum dissimilar materials, so that the connection of the steel-aluminum dissimilar materials by the commonly used resistance spot welding equipment at present becomes practical. And the additional connecting piece (the steel compression ring 30) has low cost, simple structure and no huge cost increase, and has stronger cost advantage compared with the processes of rotary tapping riveting, self-piercing riveting and the like. And the mode of resistance spot welding easily realizes electrical control, easily realizes the information and the automation of welding.
In one embodiment, the aluminum plate 10 is made of pure aluminum or an aluminum alloy material. But also cast aluminium.
In one embodiment, the steel compression ring 30 is made of alloy steel or stainless steel.
When the material of the steel pressure ring 30 is selected, firstly, the toughness of the steel pressure ring 30 is better than that of aluminum alloy, and the solid-liquid phase transition temperature is higher than that of the aluminum alloy, secondly, the steel pressure ring 30 needs to be combined with the steel plate 20 through resistance spot welding to realize interatomic bonding, and in addition, the material is required to be easily obtained and processed. In view of the above, alloy steel or stainless steel is preferred for the preparation of the steel compression ring 30. In one embodiment, the steel compression ring 30 comprises the following chemical components in percentage by weight: 0.03 to 0.60%, Mn: 0.15 to 2.00%, Si: 0.15-1.0%, S: less than or equal to 0.04 percent, P: not more than 0.04%, B not more than 0.005%, Ni: less than or equal to 25 percent, Cr: less than or equal to 20 percent, Nb: less than or equal to 0.5 percent, Mo: less than or equal to 0.5 percent, Al: 0.05-0.6% and the balance Fe.
Optionally, the yield strength of the steel compression ring 30 is 250-800 MPa, the tensile strength is 280-1280 MPa, the elongation is 5-40%, and the Vickers hardness is larger than or equal to 150.
In one embodiment, the height of the steel pressure ring 30 is less than the smaller of 1.5T1 and T1+10mm, where T1 is the thickness of the aluminum plate 10. The height of the steel pressure ring 30 is determined according to the thickness of the aluminum plate 10 and the steel plate 20. Firstly, the height of the steel pressure ring 30 is ensured to be larger than the thickness of the aluminum plate 10, and the steel pressure ring 30 can be effectively contacted with the lower layer of the steel plate 20 after being pressed down and form metallurgical bonding, so the lowest height of the steel pressure ring 30 determined by the invention is the thickness T1 of the aluminum alloy plate. The steel press ring 30 with a height exceeding the thickness of the aluminum plate 10 causes the surface of the welding spot to be seriously protruded and the surface molding to be poor. According to analysis of relevant experimental results, the height of the steel compression ring 30 determined by the invention should not exceed 1.5 times of the thickness of the aluminum plate 10 and not exceed T1+10 mm.
In another embodiment, the steel pressure ring 30 further satisfies a thickness of 0.5T1-2T 1.
The inner diameter and the outer diameter of the steel pressure ring 30 are determined according to the mechanical property requirement of welding spots, the performance of resistance spot welding equipment, the size of an electrode cap and other factors. In order to ensure the mechanical property of the welding joint, the inner diameter of the steel pressure ring 30 is 3-38mm, namely 3mm, 4mm, 10mm or 38 mm. The steel pressure ring 30 has a wall thickness of not less than 0.5mmm, for example 0.5mm or 1 mm. The steel pressure ring 30 has an outer diameter of 4-40mm, for example 4mm, 10mm or 40 mm.
Fig. 2 is a process flow diagram of a method for manufacturing a steel-aluminum material connector according to an embodiment of the invention. In another embodiment shown in FIG. 2, omitting S10 in FIG. 2, after S10, the method comprises the following steps:
s21: a cylindrical steel pressure ring 30 (step 1 in fig. 2) was prepared.
S31: the steel pressing ring 30 is placed at a predetermined position on the top surface of the aluminum plate 10 such that the center of the steel pressing ring 30 coincides with the center of the welding point (step 2 in fig. 2).
S41: resistance spot welding (step 3 in fig. 2) is applied between the top surface of the steel pressure ring 30 and the bottom surface of the steel plate 20 with a welding pressure F1 of 0.5 to 4kN, a welding current I1 of 5 to 15kA, and a holding time of 5 to 3000ms, during which the aluminum plate 10 forms a local melting region indicated by S in fig. 2.
S51: when the steel pressure ring is pressed through the aluminum plate 10 and brought into contact with the top surface of the steel plate 20, resistance spot welding is applied between the top surface of the steel pressure ring 30 and the bottom surface of the steel plate 20 with a welding pressure F2 of 2 to 10kN, a welding current I2 of 5 to 15kA, and a holding time of 10 to 1000ms (step 4 in fig. 2). After cooling, the steel pressure ring 30 and the bottom layer steel plate 20 form a metallurgical bond.
And in the process of S41, the center line of the steel press ring 30, the center of the welding point position and the center line of the electrode cap are superposed, and when the first welding is not started, the upper electrode of the resistance spot welding equipment is 2-50mm higher than the steel press ring 30, so that the steel press ring 30 can be conveniently placed in.
Optionally, a flat-bottom electrode cap is adopted in the resistance spot welding process, so that the contact surface of the electrode and the sample is a complete plane, and the welding quality is ensured.
The welding process parameters influence the thermal cycle process of the welded joint, thereby influencing the structure and mechanical properties of the welded joint. In the aspect of welding construction efficiency, the scientific and reasonable welding process specification can improve the welding construction efficiency. Meanwhile, reasonable welding process parameters have very important influence on avoiding accelerated corrosion of a welding joint caused by welding defects such as air holes, slag inclusion and the like. And determining the welding process parameters according to relevant experimental analysis. The specific welding process parameters can be changed according to actual welding equipment and field production conditions.
The invention also provides a steel-aluminum material connecting piece manufactured by any one of the manufacturing methods, so that the connecting joint of the steel-aluminum material connecting piece has good mechanical properties, such as tensile strength not less than 1.8kN, shear strength not less than 2.5kN and maximum torque not less than 6N m. The sizes, materials, properties, connection forms and the like of the components of the steel-aluminum material connecting piece refer to the previous embodiment, and are not described in detail herein.
Thus, it should be appreciated by those skilled in the art that while a number of exemplary embodiments of the invention have been illustrated and described in detail herein, many other variations or modifications consistent with the principles of the invention may be directly determined or derived from the disclosure of the present invention without departing from the spirit and scope of the invention. Accordingly, the scope of the invention should be understood and interpreted to cover all such other variations or modifications.
Claims (9)
1. A manufacturing method of a steel-aluminum material connecting piece is used for connecting an aluminum plate and a steel plate and is characterized by comprising the following steps:
stacking the aluminum plate on the steel plate;
preparing a steel compression ring, wherein the height of the steel compression ring is not less than the thickness of the aluminum plate;
placing the steel compression ring at a preset position on the top surface of the aluminum plate, wherein the axis of the steel compression ring is perpendicular to the surface of the aluminum plate;
applying first resistance spot welding between the top surface of the steel compression ring and the bottom surface of the steel plate according to first welding parameters, so that the aluminum plate is locally molten while the steel plate and the steel compression ring are in a solid phase;
when the steel pressing ring is pressed through the aluminum plate and is in contact with the top surface of the steel plate, second resistance spot welding is applied between the top surface of the steel pressing ring and the bottom surface of the steel plate according to second welding parameters, so that a connecting joint with preset mechanical property is formed among the aluminum plate, the steel pressing ring and the steel plate;
the height of the steel pressure ring is smaller than the smaller value of 1.5T1 and T1+10mm, wherein T1 is the thickness of the aluminum plate.
2. The method of manufacturing according to claim 1,
the aluminum plate is made of pure aluminum or an aluminum alloy material.
3. The method of manufacturing according to claim 1,
the steel pressure ring is made of alloy steel or stainless steel.
4. The method of manufacturing according to claim 1,
the thickness of the steel pressure ring is 0.5T1-2T 1.
5. The method of manufacturing according to claim 1,
the yield strength of the steel compression ring is 250-800 MPa, the tensile strength is 280-1280 MPa, the elongation is 5-40%, and the Vickers hardness is larger than or equal to 150.
6. The method of manufacturing according to any one of claims 1 to 5, wherein applying a first resistance spot weld between the top surface of the steel pressure ring and the bottom surface of the steel plate with a first welding parameter comprises:
and applying resistance spot welding with the welding pressure of 0.5-4kN, the welding current of 5-15kA and the holding time of 5-3000ms between the top surface of the steel pressure ring and the bottom surface of the steel plate.
7. The method of claim 6, wherein applying a second resistance spot weld between the top surface of the steel pressure ring and the bottom surface of the steel plate at a second welding parameter comprises:
and applying resistance spot welding with the welding pressure of 2-10kN, the welding current of 5-15kA and the holding time of 10-1000ms between the top surface of the steel pressure ring and the bottom surface of the steel plate.
8. The method of manufacturing according to claim 1,
the preset mechanical properties include a tensile strength of not less than 1.8kN, a shear strength of not less than 2.5kN, and a maximum torque of not less than 6N m.
9. A steel-aluminium material connecting piece, characterized in that it is made by the method of any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010062319.2A CN111250849B (en) | 2020-01-19 | 2020-01-19 | Manufacturing method of steel-aluminum material connecting piece and steel-aluminum material connecting piece |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010062319.2A CN111250849B (en) | 2020-01-19 | 2020-01-19 | Manufacturing method of steel-aluminum material connecting piece and steel-aluminum material connecting piece |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111250849A CN111250849A (en) | 2020-06-09 |
| CN111250849B true CN111250849B (en) | 2021-08-13 |
Family
ID=70923991
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010062319.2A Active CN111250849B (en) | 2020-01-19 | 2020-01-19 | Manufacturing method of steel-aluminum material connecting piece and steel-aluminum material connecting piece |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111250849B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105665908A (en) * | 2014-12-05 | 2016-06-15 | 通用汽车环球科技运作有限责任公司 | Resistance spot welding steel and aluminum workpieces with electrode insert |
| CN108115300A (en) * | 2016-11-30 | 2018-06-05 | 大众汽车有限公司 | The method for connecting component made of different materials |
| CN109366035A (en) * | 2018-12-18 | 2019-02-22 | 安徽江淮汽车集团股份有限公司 | Steel Al dissimilar materials resistance spot welding connection structure |
| DE102017221367A1 (en) * | 2017-11-29 | 2019-05-29 | Volkswagen Aktiengesellschaft | Device, system and method for producing a composite component and motor vehicle |
| US10384296B2 (en) * | 2014-12-15 | 2019-08-20 | Arconic Inc. | Resistance welding fastener, apparatus and methods for joining similar and dissimilar materials |
| CN110202245A (en) * | 2018-02-28 | 2019-09-06 | 通用汽车环球科技运作有限责任公司 | Aluminium-steel weld seam mechanical performance is improved by limitation steel plate deformed |
-
2020
- 2020-01-19 CN CN202010062319.2A patent/CN111250849B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105665908A (en) * | 2014-12-05 | 2016-06-15 | 通用汽车环球科技运作有限责任公司 | Resistance spot welding steel and aluminum workpieces with electrode insert |
| US10384296B2 (en) * | 2014-12-15 | 2019-08-20 | Arconic Inc. | Resistance welding fastener, apparatus and methods for joining similar and dissimilar materials |
| CN108115300A (en) * | 2016-11-30 | 2018-06-05 | 大众汽车有限公司 | The method for connecting component made of different materials |
| DE102017221367A1 (en) * | 2017-11-29 | 2019-05-29 | Volkswagen Aktiengesellschaft | Device, system and method for producing a composite component and motor vehicle |
| CN110202245A (en) * | 2018-02-28 | 2019-09-06 | 通用汽车环球科技运作有限责任公司 | Aluminium-steel weld seam mechanical performance is improved by limitation steel plate deformed |
| CN109366035A (en) * | 2018-12-18 | 2019-02-22 | 安徽江淮汽车集团股份有限公司 | Steel Al dissimilar materials resistance spot welding connection structure |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111250849A (en) | 2020-06-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100382923C (en) | Resistance welding method of different kinds of materials, and resistance welding member of aluminum alloy material and different kind of material | |
| CN111558793B (en) | Ni-based flux-cored wire and method for preparing copper-steel-based gradient composite material | |
| US9174298B2 (en) | Dissimilar metal joining method for magnesium alloy and steel | |
| KR101419191B1 (en) | Method for joining differing materials | |
| CN110039169B (en) | Electron beam welding method for titanium-aluminum dissimilar metal | |
| CN102873454A (en) | Welding method for multi-layer metal strip | |
| Wang et al. | Effects of electrode positive/negative ratio on microstructure and mechanical properties of Mg/Al dissimilar variable polarity cold metal transfer welded joints | |
| Ueda et al. | Effects of Zn-based alloys coating on mechanical properties and interfacial microstructures of steel/aluminum alloy dissimilar metals joints using resistance spot welding | |
| JP2015093283A (en) | Dissimilar metal joining method between steel plate and aluminum alloy plate, and dissimilar metal joining joint | |
| CN101288929A (en) | Titanium alloy weld jig for automatic welding | |
| CN110666329B (en) | Method for improving corrosion resistance of welded joint of aluminum plate and steel plate | |
| CN111250849B (en) | Manufacturing method of steel-aluminum material connecting piece and steel-aluminum material connecting piece | |
| CN112122758A (en) | Ni element-regulated magnetic field-assisted resistance unit welding method for aluminum alloy and steel | |
| JP2006289452A (en) | Joint body of different materials by steel material and aluminum material | |
| JP2006167801A (en) | Joined body of dissimilar materials comprising steel material and aluminum material and joining method therefor | |
| CN116900434A (en) | Method for improving wear resistance of aluminum alloy resistance spot welding electrode | |
| JP4469165B2 (en) | Dissimilar joints of steel and aluminum and their joining methods | |
| CN109317801A (en) | Micro spot welding process for nickel-plated copper wire harness and copper plate | |
| CN217316508U (en) | Welding element for connecting dissimilar metals by resistance spot welding | |
| JP7242112B2 (en) | Solid point welding method and solid point welding apparatus | |
| Dejans et al. | Copper-aluminium joining by novel locked projection welding process | |
| JP2014054672A (en) | Method for joining metal member | |
| JP7091547B1 (en) | Iron core manufacturing method | |
| CN209683806U (en) | A kind of salient point welding structure | |
| JP2019177407A (en) | Joint structure and method for manufacturing the same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20211020 Address after: 315300 No. 918, Binhai 4th Road, Hangzhou Bay New Area, Ningbo, Zhejiang Patentee after: Wanmingdao digital technology (Ningbo) Co.,Ltd. Patentee after: ZHEJIANG GEELY HOLDING GROUP Co.,Ltd. Address before: 315336 818 Binhai two road, Hangzhou Bay New District, Ningbo, Zhejiang Patentee before: NINGBO GEELY AUTOMOBILE RESEARCH AND DEVELOPMENT Co.,Ltd. Patentee before: ZHEJIANG GEELY HOLDING GROUP Co.,Ltd. |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20220823 Address after: 315336 818 Binhai two road, Hangzhou Bay New District, Ningbo, Zhejiang Patentee after: NINGBO GEELY AUTOMOBILE RESEARCH AND DEVELOPMENT Co.,Ltd. Patentee after: ZHEJIANG GEELY HOLDING GROUP Co.,Ltd. Address before: 315300 No. 918, Binhai 4th Road, Hangzhou Bay New Area, Ningbo, Zhejiang Patentee before: Wanmingdao digital technology (Ningbo) Co.,Ltd. Patentee before: ZHEJIANG GEELY HOLDING GROUP Co.,Ltd. |
|
| TR01 | Transfer of patent right |