CN113814607A - Transition layer welding wire and method for preparing titanium-steel composite material through arc melting-brazing - Google Patents
Transition layer welding wire and method for preparing titanium-steel composite material through arc melting-brazing Download PDFInfo
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- CN113814607A CN113814607A CN202110962521.5A CN202110962521A CN113814607A CN 113814607 A CN113814607 A CN 113814607A CN 202110962521 A CN202110962521 A CN 202110962521A CN 113814607 A CN113814607 A CN 113814607A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- 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
- B23K35/30—Selection of soldering or welding materials proper with the principal constituent melting at less than 1550 degrees C
- B23K35/3006—Ag as the principal constituent
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/02—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape
- B23K35/0255—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape for use in welding
- B23K35/0261—Rods, electrodes, wires
- B23K35/0266—Rods, electrodes, wires flux-cored
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/40—Making wire or rods for soldering or welding
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Abstract
The invention discloses a transition layer welding wire for preparing a titanium-steel composite material by arc melting-brazing, which comprises a flux core and a welding skin, wherein the flux core consists of the following components in percentage by mass: 60.0-70.0% of Ag powder, 10.0-20.0% of Ni powder, 5.0-10.0% of Zn powder and 5.0-10.0% of Mn powder, wherein the sum of the mass percentages of the components is 100%. The transition layer welding wire for the preparation of the titanium-steel composite material by arc melting-brazing solves the problem of direct tissue connection of titanium and steel in the process of preparing an arc additive. Also provides a preparation method of the transition layer welding wire for preparing the titanium-steel composite material by arc melting-brazing.
Description
Technical Field
The invention belongs to the field of metal materials, and particularly relates to a transition layer welding wire for preparing a titanium-steel composite material through arc melting and brazing, and a preparation method of the transition layer welding wire for preparing the titanium-steel composite material through arc melting and brazing.
Background
The additive manufacturing technology is a manufacturing technology developed in the later stage of the 80 th century, and is based on the idea of dispersion and accumulation, the three-dimensional digital model of a part to be processed is subjected to layered slicing processing, and finally, direct manufacturing of the part is realized in a layer-by-layer accumulation mode. Compared with the traditional manufacturing method, the method has the advantages that the traditional manufacturing method that parts depend on multi-process combination is broken through, the integrated manufacturing of design and processing is realized, and the material utilization rate is extremely high.
The titanium-steel composite structure combines the high strength of steel and the excellent corrosion resistance of titanium. The direct manufacture of the titanium-steel connection structure by means of metal additive manufacturing has the following advantages: firstly, metal additive manufacturing based on the discrete/accumulation idea is not limited by the complexity of an actual structure, and can meet the requirements of clamping and precision in industrial production; secondly, in the practical application in the fields of aerospace, petrochemical industry and the like, in order to improve the corrosion resistance of the structure, a large-diameter titanium pipe body is often used, a large-size titanium ingot is often forged in the pipe body manufacturing method, and the pipe body structure is finally obtained, so that the production cost is extremely high, the period is long, the waste of materials and energy is also caused, and the material increase manufacturing is a layer-by-layer accumulation manufacturing method and has the advantages of high material utilization rate, short production period and the like. However, it is difficult to obtain a titanium-steel joint with reliable performance due to the large difference in physicochemical properties between titanium and steel. In order to realize the additive manufacturing of the titanium-steel gradient structure, the gradient connection of materials on two sides of the titanium-steel can be realized by adding alloy welding wires with different components, so that the performance difference between the titanium-steel gradient structure and the titanium-steel gradient structure is relieved, and in addition, the different alloy components are also beneficial to the metallurgical regulation and control of the interface, and the microstructure and the connection performance of the interface are improved.
Disclosure of Invention
The invention aims to provide a transition layer welding wire for preparing a titanium-steel composite material by arc melting-brazing, which solves the problem of direct tissue connection of titanium and steel in the process of preparing an arc additive.
The invention also aims to provide a preparation method of the transition layer welding wire for preparing the titanium-steel composite material through arc melting-brazing.
The technical scheme adopted by the invention is that the transition layer welding wire for preparing the titanium-steel composite material by arc melting-brazing comprises a flux core and a welding skin, wherein the flux core comprises the following components in percentage by mass: 60.0-70.0% of Ag powder, 10.0-20.0% of Ni powder, 5.0-10.0% of Zn powder and 5.0-10.0% of Mn powder, wherein the sum of the mass percentages of the components is 100%.
The present invention is also characterized in that,
the granularity of each medicinal powder is 100-200 meshes; the filling amount of the flux-cored wire is controlled to be 30-35 wt.%.
The welding skin is a red copper strip, the thickness of the red copper strip is 0.4mm, and the width of the red copper strip is 7 mm.
The invention adopts another technical scheme that the preparation method of the transition layer welding wire for preparing the titanium-steel composite material by arc melting-brazing specifically comprises the following steps:
step 1: weighing the following medicinal powder in percentage by mass: 60.0-70.0% of Ag powder, 10.0-20.0% of Ni powder, 5.0-10.0% of Zn powder and 5.0-10.0% of Mn powder, wherein the sum of the mass percentages of the components is 100%;
step 2: heating the powder weighed in the step 1 in a vacuum heating furnace at the temperature of 300-350 ℃ for 2-3h, and removing crystal water in the powder; putting the dried medicinal powder into a powder mixer for fully mixing for 1.5-2 h;
and step 3: a red copper strip is used as a welding skin, oil on the surface of the red copper strip is removed by alcohol, the powder prepared in the step 2 is wrapped in the red copper strip by flux-cored wire drawing equipment, and the aperture of a first drawing die is 2.6 mm;
and 4, step 4: after the first process is finished, the aperture of the die is reduced in sequence, and finally the flux-cored wire with the diameter of 1.0-1.2 mm is obtained.
The present invention is also characterized in that,
in the step 1, the granularity of each medicinal powder is 100-200 meshes.
In the step 3, the thickness of the red copper strip is 0.4mm, and the width of the red copper strip is 7 mm; the filling amount of the flux-cored wire is controlled to be 30-35 wt.%.
The invention has the beneficial effects that:
(1) the welding wire is suitable for electric arc additive manufacturing of a titanium-steel composite structure and is mainly used for solving the problem of direct tissue connection of titanium and steel in the electric arc additive manufacturing process.
(2) The main element of the welding wire is copper, and the second element is silver. The silver and the copper can be in infinite solid solution, and a eutectic with low melting point can be formed between the silver, the copper and the titanium, so that the melting point of the gradient layer is reduced.
(3) The welding wire provided by the invention is also added with Zn and Mn alloy elements, so that the wettability of the gradient layer and the matrix in the titanium-steel arc additive manufacturing process is improved, and the effects of avoiding the growth of brittle phases and preventing cracks are achieved.
(4) The welding wire of the invention uses the copper strip to wrap a plurality of alloy elements, adopts the welding strategy of melting-brazing, not only mainly melts the welding material of the transition layer in the preparation process of the titanium-steel composite structure, but also melts the base metal as little as possible. Thereby reducing the generation of brittle Fe-Ti intermetallics in the weld.
Drawings
FIG. 1 is a microstructure of a weld bead deposited on a steel substrate using a conventional copper wire (ERCuSi-Al).
FIG. 2 is a microstructure of a weld bead deposited on a steel substrate using the flux-cored wire prepared in example 2;
fig. 3 is a microstructure of a gradient layer in an arc additive manufacturing process of a titanium-steel composite structure performed on the flux-cored wire prepared in example 2.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
The invention provides a transition layer welding wire for preparing a titanium-steel composite material by arc melting-brazing, which comprises a flux core and a welding skin, wherein the flux core consists of the following components in percentage by mass: 60.0-70.0% of Ag powder, 10.0-20.0% of Ni powder, 5.0-10.0% of Zn powder and 5.0-10.0% of Mn powder, wherein the sum of the mass percentages of the components is 100%.
Wherein the granularity of each medicinal powder is 100-200 meshes; the filling amount of the flux-cored wire is controlled to be 30-35 wt.%; the welding skin is a red copper strip, the thickness of the red copper strip is 0.4mm, and the width of the red copper strip is 7 mm.
The main alloy components in the flux-cored wire have the following functions and functions:
cu is the main element of the copper strip of the flux-cored wire. Cu has a low melting point and is a commonly used brazing material. The Cu-Fe binary phase diagram shows that the Cu-Fe binary phase diagram does not generate brittle intermetallic compounds; the Cu-Ti binary phase diagram shows that the Cu-Ti binary phase diagram generates a plurality of Cu-Ti intermetallic compounds, but the plasticity and toughness of the Cu-Ti intermetallic compounds are better than those of Fe-Ti brittle phases. Therefore, it is feasible to prepare a gradient layer of the titanium-steel composite material by using Cu as a main element.
Ag is used as the main alloy element of the flux-cored wire. Ternary eutectic phase with lower melting point and better plastic toughness can be generated among Ag, Cu and Ti, so that the development of the fusion brazing process of the welding wire of the transition layer in the preparation of the titanium-steel gradient layer is ensured. No brittle phase is formed between Ag and Fe. Therefore, Ag is used as the main alloy element of the powder to regulate and control the welding and brazing process of the gradient layer of the titanium-steel composite structure, and the method is feasible.
Ni is used as another main alloy element of the flux-cored wire, and the metallurgical bonding between Ni and Fe is better, so that the addition of Ni can improve the bonding strength between the gradient layer and a steel matrix. The weldability between Ni and Cu is good, and the formed phase has good toughness, so that the residual stress generated in the electric arc additive manufacturing process can be effectively relieved. Various Ti-Ni intermetallic compounds can be generated between Ni and titanium, so that the effect of regulating the Cu-Ti intermetallic compounds can be achieved.
Mn element can be infinitely dissolved in Cu, the action effect is similar to that of Ni, and the bonding strength of the transition layer welding seam and the upper Cu welding seam can be further improved. In addition, Zn and Mn both have the function of improving the wettability of the gradient layer and the matrix.
The invention provides a preparation method of a transition layer welding wire for preparing a titanium-steel composite material by arc melting-brazing, which comprises the following specific steps:
step 1: weighing the following medicinal powder in percentage by mass: 60.0-70.0% of Ag powder, 10.0-20.0% of Ni powder, 5.0-10.0% of Zn powder and 5.0-10.0% of Mn powder, wherein the sum of the mass percentages of the components is 100%; in the step 1, the granularity of each medicinal powder is 100-200 meshes;
step 2: heating the powder weighed in the step 1 in a vacuum heating furnace at the temperature of 300-350 ℃ for 2-3h, and removing crystal water in the powder; putting the dried medicinal powder into a powder mixer for fully mixing for 1.5-2 h;
and step 3: a red copper strip is used as a welding skin, oil on the surface of the red copper strip is removed by alcohol, the powder prepared in the step 2 is wrapped in the red copper strip by flux-cored wire drawing equipment, and the aperture of a first drawing die is 2.6 mm; in the step 3, the thickness of the red copper strip is 0.4mm, and the width of the red copper strip is 7 mm; the filling amount of the flux-cored wire is controlled to be 30-35 wt.%;
and 4, step 4: after the first process is finished, the aperture of the die is reduced in sequence, and finally the flux-cored wire with the diameter of 1.0-1.2 mm is obtained.
And 5: and after the flux-cored wire is drawn, the flux-cored wire is wound on a wire reel through a wire winding machine and finally sealed in a flux-cored wire vacuum packaging bag for later use.
The process of arc surfacing on a steel matrix by adopting the prepared transition layer welding wire for the preparation of the titanium-steel composite material by arc melting-brazing is as follows:
(1) polishing the steel plate with a steel wire brush, and removing oil stains on the steel plate with organic solvents such as alcohol, acetone and the like;
(2) carrying out arc surfacing on a steel substrate by adopting the prepared transition layer welding wire, wherein the welding current is 180-200A, and the thickness of the surfacing layer is 10 mm; a CMT welding power supply is adopted in the surfacing process, so that less melting of a matrix is ensured, and mainly welding wire melting is taken as a main material, so that the effect of fusion welding is realized;
(3) and surfacing the surfacing layer by adopting an ERTi-1 welding wire to prepare a titanium layer, wherein the welding current is 80-100A.
Example 1
Step 1: 60.0 percent of Ag powder, 20.0 percent of Ni powder, 10.0 percent of Zn powder and 10.0 percent of Mn powder are respectively weighed according to the mass percent, and the sum of the mass percent of the components is 100 percent.
Step 2: heating the powder weighed in the step 1 in a vacuum heating furnace at 350 ℃ for 2 hours, and removing crystal water in the powder; putting the dried medicinal powder into a powder mixing machine for fully mixing for 1.5 h;
and step 3: a red copper strip is used as a welding skin, oil on the surface of the red copper strip is removed by alcohol, the powder prepared in the step 2 is wrapped in the red copper strip by flux-cored wire drawing equipment, and the aperture of a first drawing die is 2.6 mm; the filling amount of the flux-cored wire is controlled at 30 wt.%;
and 4, step 4: after the first process is finished, the aperture of the die is reduced in sequence, and finally the flux-cored wire with the diameter of 1.0mm is obtained.
And 5: and after the flux-cored wire is drawn, the flux-cored wire is wound on a wire reel through a wire winding machine and finally sealed in a flux-cored wire vacuum packaging bag for later use.
The transition layer welding wire for preparing the titanium-steel composite material by arc melting-brazing in the embodiment 1 is used for carrying out arc additive manufacturing on a titanium-steel composite structure, and the manufacturing process is as follows:
(1) polishing the steel plate with a steel wire brush, and removing oil stains on the steel plate with organic solvents such as alcohol, acetone and the like;
(2) carrying out arc surfacing on a steel substrate by adopting the prepared transition layer welding wire, wherein the welding current is 180-200A, and the thickness of the surfacing layer is 10 mm; a CMT welding power supply is adopted in the surfacing process, so that less melting of a matrix is ensured, and mainly welding wire melting is taken as a main material, so that the effect of fusion welding is realized;
(3) and surfacing the surfacing layer by adopting an ERTi-1 welding wire to prepare a titanium layer, wherein the welding current is 80-100A.
Through tests, the tensile strength of the welding joint of the copper-steel composite plate is 345MPa, and the elongation is 19%.
Example 2
Step 1: 70.0 percent of Ag powder, 10.0 percent of Ni powder, 10.0 percent of Zn powder and 10.0 percent of Mn powder are respectively weighed according to the mass percentage, and the sum of the mass percentages of the components is 100 percent.
Step 2: heating the powder weighed in the step 1 in a vacuum heating furnace at 350 ℃ for 2 hours, and removing crystal water in the powder; putting the dried medicinal powder into a powder mixing machine for fully mixing for 1.5 h;
and step 3: a red copper strip is used as a welding skin, oil on the surface of the red copper strip is removed by alcohol, the powder prepared in the step 2 is wrapped in the red copper strip by flux-cored wire drawing equipment, and the aperture of a first drawing die is 2.6 mm; the filling amount of the flux-cored wire is controlled to be 35 wt.%;
and 4, step 4: after the first process is finished, the aperture of the die is reduced in sequence, and finally the flux-cored wire with the diameter of 1.2mm is obtained.
And 5: and after the flux-cored wire is drawn, the flux-cored wire is wound on a wire reel through a wire winding machine and finally sealed in a flux-cored wire vacuum packaging bag for later use.
The transition layer welding wire for the arc melting-brazing preparation of the titanium-steel composite material prepared in example 2 was used for the arc additive manufacturing of the titanium-steel composite structure, and the manufacturing process thereof was as follows:
(1) polishing the steel plate with a steel wire brush, and removing oil stains on the steel plate with organic solvents such as alcohol, acetone and the like;
(2) carrying out arc surfacing on a steel substrate by adopting the prepared transition layer welding wire, wherein the welding current is 180-200A, and the thickness of the surfacing layer is 10 mm; a CMT welding power supply is adopted in the surfacing process, so that less melting of a matrix is ensured, and mainly welding wire melting is taken as a main material, so that the effect of fusion welding is realized;
(3) and surfacing the surfacing layer by adopting an ERTi-1 welding wire to prepare a titanium layer, wherein the welding current is 80-100A.
Through tests, the tensile strength of the welding joint of the copper-steel composite plate is 427MPa, and the elongation is 15%.
The microstructure of a weld bead formed by a conventional copper welding wire (ERCuSi-Al) on a steel substrate is shown in FIG. 1, and it can be seen that the structure distribution in the weld bead is not uniform. The welding wire prepared in the example 2 is used for surfacing on a steel substrate, the microstructure of the welding wire is shown in fig. 2, the welding seam structure is uniformly distributed, the welding seam and the steel welding seam are well combined, and the defects of cracks, air holes and the like are not found. The prepared welding wire is adopted to carry out electric arc additive manufacturing of a titanium-steel composite structure, the microstructure of the gradient layer is shown in figure 3 and mainly comprises Cu-Ti intermetallic compounds and eutectic phases, and the structure distribution is uniform. Example 3
Step 1: 68.0 percent of Ag powder, 15.0 percent of Ni powder, 10.0 percent of Zn powder and 7.0 percent of Mn powder are respectively weighed according to the mass percent, and the sum of the mass percent of the components is 100 percent.
Step 2: heating the powder weighed in the step 1 in a vacuum heating furnace at the heating temperature of 300 ℃ for 3 hours, and removing crystal water in the powder; putting the dried medicinal powder into a powder mixer for fully mixing for 2 h;
and step 3: a red copper strip is used as a welding skin, oil on the surface of the red copper strip is removed by alcohol, the powder prepared in the step 2 is wrapped in the red copper strip by flux-cored wire drawing equipment, and the aperture of a first drawing die is 2.6 mm; the filling amount of the flux-cored wire is controlled at 32 wt.%;
and 4, step 4: after the first process is finished, the aperture of the die is reduced in sequence, and finally the flux-cored wire with the diameter of 1.2mm is obtained.
And 5: and after the flux-cored wire is drawn, the flux-cored wire is wound on a wire reel through a wire winding machine and finally sealed in a flux-cored wire vacuum packaging bag for later use.
The transition layer welding wire for the arc melting-brazing preparation of the titanium-steel composite material prepared in example 3 was used for the arc additive manufacturing of the titanium-steel composite structure, and the manufacturing process thereof was as follows:
(1) polishing the steel plate with a steel wire brush, and removing oil stains on the steel plate with organic solvents such as alcohol, acetone and the like;
(2) carrying out arc surfacing on a steel substrate by adopting the prepared transition layer welding wire, wherein the welding current is 180-200A, and the thickness of the surfacing layer is 10 mm; a CMT welding power supply is adopted in the surfacing process, so that less melting of a matrix is ensured, and mainly welding wire melting is taken as a main material, so that the effect of fusion welding is realized;
(3) and surfacing the surfacing layer by adopting an ERTi-1 welding wire to prepare a titanium layer, wherein the welding current is 80-100A.
The test shows that the tensile strength of the welding joint of the copper-steel composite plate is 380MPa, and the elongation is 15%.
Example 4
Step 1: 70.0 percent of Ag powder, 18.0 percent of Ni powder, 7.0 percent of Zn powder and 5.0 percent of Mn powder are respectively weighed according to the mass percentage, and the sum of the mass percentages of the components is 100 percent.
Step 2: heating the powder weighed in the step 1 in a vacuum heating furnace at 350 ℃ for 2 hours, and removing crystal water in the powder; putting the dried medicinal powder into a powder mixing machine for fully mixing for 1.5 h;
and step 3: a red copper strip is used as a welding skin, oil on the surface of the red copper strip is removed by alcohol, the powder prepared in the step 2 is wrapped in the red copper strip by flux-cored wire drawing equipment, and the aperture of a first drawing die is 2.6 mm; the filling amount of the flux-cored wire is controlled at 30 wt.%;
and 4, step 4: after the first process is finished, the aperture of the die is reduced in sequence, and finally the flux-cored wire with the diameter of 1.0mm is obtained.
And 5: and after the flux-cored wire is drawn, the flux-cored wire is wound on a wire reel through a wire winding machine and finally sealed in a flux-cored wire vacuum packaging bag for later use.
The transition layer welding wire for the arc melting-brazing preparation of the titanium-steel composite material prepared in example 4 was used for the arc additive manufacturing of the titanium-steel composite structure, and the manufacturing process thereof was as follows:
(1) polishing the steel plate with a steel wire brush, and removing oil stains on the steel plate with organic solvents such as alcohol, acetone and the like;
(2) carrying out arc surfacing on a steel substrate by adopting the prepared transition layer welding wire, wherein the welding current is 180-200A, and the thickness of the surfacing layer is 10 mm; a CMT welding power supply is adopted in the surfacing process, so that less melting of a matrix is ensured, and mainly welding wire melting is taken as a main material, so that the effect of fusion welding is realized;
(3) and surfacing the surfacing layer by adopting an ERTi-1 welding wire to prepare a titanium layer, wherein the welding current is 80-100A.
The test shows that the tensile strength of the welding joint of the copper-steel composite plate is 396MPa, and the elongation is 14%.
Example 5
Step 1: 70.0 percent of Ag powder, 17.0 percent of Ni powder, 5.0 percent of Zn powder and 8.0 percent of Mn powder are respectively weighed according to the mass percentage, and the sum of the mass percentages of the components is 100 percent.
Step 2: heating the powder weighed in the step 1 in a vacuum heating furnace at 350 ℃ for 2 hours, and removing crystal water in the powder; putting the dried medicinal powder into a powder mixing machine for fully mixing for 1.5 h;
and step 3: a red copper strip is used as a welding skin, oil on the surface of the red copper strip is removed by alcohol, the powder prepared in the step 2 is wrapped in the red copper strip by flux-cored wire drawing equipment, and the aperture of a first drawing die is 2.6 mm; the filling amount of the flux-cored wire is controlled to be 33 wt.%;
and 4, step 4: after the first process is finished, the aperture of the die is reduced in sequence, and finally the flux-cored wire with the diameter of 1.2mm is obtained.
And 5: and after the flux-cored wire is drawn, the flux-cored wire is wound on a wire reel through a wire winding machine and finally sealed in a flux-cored wire vacuum packaging bag for later use.
The transition layer welding wire for the arc melting-brazing preparation of the titanium-steel composite material prepared in example 5 was used for the arc additive manufacturing of the titanium-steel composite structure, and the manufacturing process thereof was as follows:
(1) polishing the steel plate with a steel wire brush, and removing oil stains on the steel plate with organic solvents such as alcohol, acetone and the like;
(2) carrying out arc surfacing on a steel substrate by adopting the prepared transition layer welding wire, wherein the welding current is 180-200A, and the thickness of the surfacing layer is 10 mm; a CMT welding power supply is adopted in the surfacing process, so that less melting of a matrix is ensured, and mainly welding wire melting is taken as a main material, so that the effect of fusion welding is realized;
(3) and surfacing the surfacing layer by adopting an ERTi-1 welding wire to prepare a titanium layer, wherein the welding current is 80-100A.
The test shows that the tensile strength of the copper-steel composite plate welding joint is 371MPa, and the elongation is 19%.
Claims (6)
1. The transition layer welding wire for the preparation of the titanium-steel composite material through arc melting-brazing is characterized by comprising a flux core and a welding skin, wherein the flux core comprises the following components in percentage by mass: 60.0-70.0% of Ag powder, 10.0-20.0% of Ni powder, 5.0-10.0% of Zn powder and 5.0-10.0% of Mn powder, wherein the sum of the mass percentages of the components is 100%.
2. The transition layer welding wire for the preparation of titanium-steel composite material through arc melting-brazing as claimed in claim 1, wherein the particle size of each powder is 100-200 meshes; the filling amount of the flux-cored wire is controlled to be 30-35 wt.%.
3. The transition layer welding wire for the preparation of titanium-steel composite material by arc melting-brazing as claimed in claim 1, wherein the welding skin is a copper strip, the thickness of the copper strip is 0.4mm, and the width of the copper strip is 7 mm.
4. The preparation method of the transition layer welding wire for the preparation of the titanium-steel composite material by arc melting-brazing is characterized by comprising the following specific steps of:
step 1: weighing the following medicinal powder in percentage by mass: 60.0-70.0% of Ag powder, 10.0-20.0% of Ni powder, 5.0-10.0% of Zn powder and 5.0-10.0% of Mn powder, wherein the sum of the mass percentages of the components is 100%;
step 2: heating the powder weighed in the step 1 in a vacuum heating furnace at the temperature of 300-350 ℃ for 2-3h, and removing crystal water in the powder; putting the dried medicinal powder into a powder mixer for fully mixing for 1.5-2 h;
and step 3: a red copper strip is used as a welding skin, oil on the surface of the red copper strip is removed by alcohol, the powder prepared in the step 2 is wrapped in the red copper strip by flux-cored wire drawing equipment, and the aperture of a first drawing die is 2.6 mm;
and 4, step 4: after the first process is finished, the aperture of the die is reduced in sequence, and finally the flux-cored wire with the diameter of 1.0-1.2 mm is obtained.
5. The method for preparing the transition layer welding wire for the titanium-steel composite material arc melting-brazing preparation according to claim 4, wherein in the step 1, the granularity of each powder is 100-200 meshes.
6. The method for preparing the transition layer welding wire for the arc melting-brazing preparation of the titanium-steel composite material as claimed in claim 4, wherein in the step 3, the thickness of the red copper strip is 0.4mm, and the width is 7 mm; the filling amount of the flux-cored wire is controlled to be 30-35 wt.%.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114367759A (en) * | 2022-01-11 | 2022-04-19 | 西安理工大学 | Welding wire capable of effectively controlling Fe-Al brittle phase and preparation and welding method |
| CN114367743A (en) * | 2022-01-11 | 2022-04-19 | 西安理工大学 | Titanium-steel gradient structure material and method for electric arc + laser coupling regulation |
| CN114367759B (en) * | 2022-01-11 | 2024-04-05 | 西安理工大学 | Welding wire capable of effectively controlling Fe-Al brittle phase and preparation and welding methods |
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| CN113814607B (en) | 2022-09-06 |
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