CN112059472B - Welding wire for welding of case and preparation method and application thereof - Google Patents
Welding wire for welding of case and preparation method and application thereof Download PDFInfo
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- CN112059472B CN112059472B CN202010944625.9A CN202010944625A CN112059472B CN 112059472 B CN112059472 B CN 112059472B CN 202010944625 A CN202010944625 A CN 202010944625A CN 112059472 B CN112059472 B CN 112059472B
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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
- B23K35/3033—Ni as the principal constituent
- B23K35/304—Ni as the principal constituent with Cr as the next major 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
- B23K35/40—Making wire or rods for soldering or welding
Abstract
A welding wire for welding a cartridge receiver and a preparation method and application thereof belong to the field of welding materials, and the welding wire comprises the following elements: 0.03 to 0.06 wt%, Cr: 15-16 wt%, Mo: 14-16 wt%, Fe: 1 wt% or less, Si: less than or equal to 0.5 wt%, Mn: 1-2 wt%, S: less than or equal to 0.015 wt%, P: less than or equal to 0.015wt percent, and the balance being Ni; the gas element content of the welding wire is less than or equal to 0.0017 wt% of O, less than or equal to 0.0018 wt% of N and less than or equal to 0.0002 wt% of H. The preparation method of the welding wire comprises alloy smelting, forging, hot rolling and cold drawing. The welding wire prepared by the invention can improve the welding firmness of the alloy with high aluminum and titanium content, is not easy to generate welding cracks, greatly improves the heat crack resistance of welding seams, can resist high-temperature welding at 900 ℃, and is suitable for welding age-hardening alloy casing parts with the mass content of 2-2.5% of aluminum and 1-1.5% of titanium.
Description
Technical Field
The invention belongs to the field of welding materials, and particularly relates to a welding wire for welding a casing, and a preparation method and application thereof.
Background
Age hardening alloys with high aluminum and titanium contents, such as GH4708 and GH4199 alloys, are easy to generate hot cracks during welding, and the existing welding wires cannot realize the welding of the age hardening alloys with high aluminum and titanium contents in the fields of military, civil aviation engines and gas turbines, so that the development of suitable welding wires is needed, the technical blank is filled, the welding purpose is realized, and the heat cracking resistance of the welding line is ensured.
Disclosure of Invention
Aiming at the problems of poor heat crack resistance of welding seams of welding wires in the prior art and easy generation of heat cracks during welding, the invention provides the welding wire for welding the case as well as the preparation method and the application thereof, the composition and the preparation parameters are designed, and the prepared welding wires can improve the firmness of welding alloys containing high aluminum and titanium, are not easy to generate welding cracks, greatly improve the heat crack resistance of the welding seams and can resist the high-temperature welding of 900 ℃. The specific technical scheme is as follows:
a welding wire for welding a cartridge receiver, which comprises the following components: 0.03 to 0.06 wt%, Cr: 15-16 wt%, Mo: 14-16 wt%, Fe: 1 wt% or less, Si: less than or equal to 0.5 wt%, Mn: 1-2 wt%, S: less than or equal to 0.015 wt%, P: less than or equal to 0.015wt percent, and the balance being Ni; the gas element content of the welding wire is less than or equal to 0.0017 wt% of O, less than or equal to 0.0018 wt% of N and less than or equal to 0.0002 wt% of H;
when the diameter of the welding wire is phi 1.0mm, the tensile strength of the welding wire is 1490-1500 Mpa, the welding crack rate is 0%, and the tensile strength of a welding joint is more than or equal to 1200 Mpa; when the diameter of the welding wire is phi 1.6mm, the tensile strength of the welding wire is 1400 Mpa-1420 Mpa, the welding crack rate is 5%, and the tensile strength of a welding joint is more than or equal to 1200 Mpa.
The preparation method of the welding wire for welding the casing comprises the following steps of:
(1) weighing raw materials according to the element components of the welding wire, and smelting by using a vacuum induction furnace; during material distribution, firstly, a nickel plate with the mass of 40-60% is loaded on the bottom layer of the crucible, then metal Cr and Mo strips are loaded, and finally, the nickel plate with the residual mass of 40-60% is added; C. adding Mn auxiliary materials from a small stock bin;
(2) after the furnace burden is distributed, vacuumizing the vacuum induction furnace, when the pressure in the furnace is less than 2Pa, transmitting power to start smelting, after the raw materials are molten, heating to 1500-1550 ℃, and refining for 10-15 min;
(3) casting under vacuum condition after refining, controlling the casting temperature at 1465 ℃, and removing the alloy cast ingot after casting for 30 min;
(1) peeling off the alloy ingot to remove surface defects, then sending the alloy ingot to a heating furnace for heating, controlling the temperature of the alloy ingot in the furnace to be below 700 ℃, heating to 1170 ℃ after 3-4 h, and keeping the temperature for 1-2 h;
(2) then forging the alloy cast ingot, wherein the forging starting temperature is 1100-1150 ℃, the finish forging temperature is more than 1000 ℃, and the reburning time is 20-30 min; when forging, firstly, quickly hammering by a light hammer, after deformation is generated, hammering by the heavy hammer, forging the alloy ingot into a square billet, and then cooling the square billet to room temperature by air;
step 3, hot rolling:
polishing the surface of the square billet, removing surface oxide skin and defects, performing hot rolling by using a hot rolling mill, heating the square billet to 1180 +/-10 ℃, rolling at the beginning temperature of 1150 ℃ and the finishing temperature of over 1000 ℃, and rolling to prepare the square billet into a wire rod;
step 4, cold drawing:
(1) and annealing the wire rod in a box-type silicon-carbon rod furnace, keeping the annealing temperature at 1100 ℃, keeping the temperature for 10-30 min, and then cooling the wire rod to room temperature by water or air.
(2) Pickling the annealed wire rod to remove residual oxide skin, pockmarks and concave defects on the surface, using aqueous solution of nitric acid and hydrochloric acid as pickling solution, wherein the volume ratio of the pickling solution is HNO3:HCl:H2O is 1:3:6, the pickling temperature is 80-85 ℃, the wire rod is turned over up and down during pickling, the surface is observed, and over pickling is prevented; after acid washing is carried out until the surface is bright, washing the surface clean by high-pressure water, and finally drying the surface;
(3) cold-drawing the pickled wire rod, wherein the cold-drawing deformation of the wire rod is controlled to be 14-19%, so that the phenomena of galling and end breakage in drawing are avoided, and the problem of large accessory tensile stress on the surface caused by uneven deformation of the center and the surface of the wire rod is avoided;
(4) pickling the cold-drawn wire rod, wherein the volume ratio of the pickling solution is HNO3:HCl:H2O is 1:3:6, the pickling temperature is 80-85 ℃, the wire rod is turned over up and down during pickling, the surface is observed, and over pickling is prevented; after acid washing is carried out until the surface is bright, washing the surface clean by high-pressure water, and finally drying the surface;
(5) and (4) repeating the operations from the step (1) to the step (4) for 1-3 times, and controlling the total deformation amount to be 40-45% to obtain the finished welding wire with the diameter phi of 1.0-2.0 mm.
The welding wire for welding the casing is applied to welding of the casing made of age-hardening alloy with the mass content of 2-2.5% of aluminum and 1-1.5% of titanium.
Compared with the prior art, the welding wire for welding the casing, the preparation method and the application thereof have the advantages that:
the solid solubility is strengthened by using Cr element, the welding seam crack is prevented by using high-content Mo element during high-temperature welding, the alloy fluidity is improved by using Mn element, the element content is designed by combining the operability of actual smelting, the C element is controlled to be below 0.06 wt%, when the diameter of the prepared alloy welding wire is phi 1.0mm, the tensile strength of the welding wire is 1490-1500 Mpa, the welding crack rate is 0%, and the tensile strength of a welding joint is more than or equal to 1200 Mpa; when the diameter of the prepared welding wire is phi 1.6mm, the tensile strength of the welding wire is 1400 Mpa-1420 Mpa, the welding crack rate is 5%, and the tensile strength of a welding joint is more than or equal to 1200 Mpa. The firmness of welding the alloy with high aluminum and titanium content is effectively improved, welding cracks are not easy to generate, the heat crack resistance of the welding line is greatly improved, and the welding can be carried out at the high temperature of 900 ℃; after a high-temperature endurance test at 800 ℃ for 100h, the metallographic structure of the joint has no obvious change, the crack resistance level of the welded joint can reach one level, and the service life can be prolonged by 8-13% compared with the prior art.
According to the invention, according to the thermoplasticity of the alloy ingot of the welding wire, the temperature of the alloy ingot is raised to 1170 ℃ during forging preheating, the forging temperature is designed to be 1100-1150 ℃, the optimal deformation temperature is guaranteed to be 1100-1180 ℃, the forging forming is easy, and the optimal effect of the alloy ingot forging is achieved.
Thirdly, according to the composition characteristics of the welding wire, forging and hot rolling parameters are designed, the cold drawing deformation is controlled to be 14% -19%, the total deformation is controlled to be 40% -45%, the microstructure of the prepared welding wire is uniform and compact, the tensile strength of the welding wire is improved, and the welding crack rate is reduced.
Fourthly, the method has high production yield and good realizability.
In conclusion, the alloy welding wire can greatly improve the performance of the joint, and is widely applied to welding of aeroengine materials and welding parts such as high-pressure compressor casings, combustor casings and turbine casings made of aeroengine GH4708 alloy.
Drawings
FIG. 1 is an alloy smelting temperature rise curve diagram of a method for preparing a welding wire for casing welding according to embodiment 1 of the present invention;
FIG. 2 is a temperature rise curve diagram of an alloy ingot of a method for manufacturing a welding wire for a casing according to embodiment 1 of the present invention;
FIG. 3 is a graph showing the relationship between the ultimate deformation and the deformation resistance of the alloy ingot of example 1 of the present invention and the test temperature;
FIG. 4 is a sectional scanning electron microscope image of an alloy ingot of example 1 of the present invention;
FIG. 5 is a scanning electron micrograph of inclusions in an alloy ingot of example 1 of the present invention;
FIG. 6 is a scanning electron microscope image of the metallographic structure of the alloy ingot of example 1 of the present invention: wherein (a) is a scanning electron microscope picture of metallographic structure 100 times after solution treatment at 1150 ℃ for 1 h; (b) is composed of
A scanning electron microscope image of 100 times of the metallographic structure of the welding wire; (c) is a scanning electron microscope image of 500 times of metallographic structure after solution treatment at 1150 ℃ for 1 h; (d) is a scanning electron microscope image of 500 times of metallographic structure subjected to solution treatment at 950 ℃ for 1 hour and at 800 ℃ for 7 hours;
FIG. 7 is a scanning electron microscope image of the metallographic structure of the butt joint test piece in example 1 of the present invention: wherein, (a) is a scanning electron microscope image of the substrate crystal grain in the near seam region of the welding sample; (b) scanning electron microscope images of weld joint tissues of the welding samples;
FIG. 8 is a scanning electron microscope image of the metallographic structure of the butt test piece after the endurance test in example 1 of the present invention: wherein, (a) is a scanning electron microscope image of a welding sample near seam region structure; (b) is a scanning electron microscope image of the welding seam structure of the welding sample.
Detailed Description
The invention will be further described with reference to specific embodiments and figures 1 to 8, but the invention is not limited to these examples.
Example 1
A welding wire for welding a cartridge receiver, which comprises the following components: 0.03 wt%, Cr: 15.17 wt%, Mo: 14.49 wt%, Fe: 0.076 wt%, Si: 0.045 wt%, Mn: 1.39 wt%, S: 0.003 wt%, P: 0.003 wt%, the balance being Ni; the gas element content of the welding wire is less than or equal to 0.0017 wt% of O, less than or equal to 0.0018 wt% of N and less than or equal to 0.0002 wt% of H;
when the diameter of the welding wire is phi 1.0mm, the tensile strength of the welding wire is 1490-1500 Mpa, the welding crack rate is 0%, and the tensile strength of a welding joint is more than or equal to 1200 Mpa; when the diameter of the welding wire is phi 1.6mm, the tensile strength of the welding wire is 1400 Mpa-1420 Mpa, the welding crack rate is 5%, and the tensile strength of a welding joint is more than or equal to 1200 Mpa.
The preparation method of the welding wire for welding the casing comprises the following steps of:
(1) weighing raw materials according to the element components of the welding wire, and smelting by using a 25kg vacuum induction furnace; during material distribution, firstly, a nickel plate with the mass of 50% is filled in the bottom layer of the crucible, then, metal Cr and Mo strips are filled in the crucible, and finally, the nickel plate with the mass of 50% is added in the crucible; C. adding Mn auxiliary materials from a small stock bin;
(2) after the furnace burden is distributed, vacuumizing the vacuum induction furnace, when the pressure in the furnace is less than 2Pa, transmitting power to start smelting, after the raw materials are molten, heating to 1500 ℃, and refining for 10 min;
(3) casting under vacuum condition after refining, controlling the casting temperature at 1465 ℃, and removing the alloy cast ingot after casting for 30 min; the alloy smelting temperature rise curve is shown in figure 1;
(1) peeling off the alloy ingot to remove surface defects, then sending the alloy ingot to a heating furnace for heating, controlling the temperature of the alloy ingot in the furnace to be 700 ℃, heating for 3-4 h, raising the temperature to 1170 ℃, and keeping the temperature for 1 h; the temperature rise curve of the alloy ingot is shown in FIG. 2;
(2) then, forging the alloy cast ingot on a 750kg air hammer, wherein the forging starting temperature is 1150 ℃, the finish forging temperature is 1000 ℃, and the reburning time is 20 min; when forging, firstly, quickly hammering by a light hammer, after deformation is generated, hammering by a heavy hammer, forging the alloy cast ingot into a square billet of 40mm multiplied by 1200mm, and then air-cooling to room temperature;
step 3, hot rolling:
polishing the surface of a square billet, removing surface oxide skin and defects, performing hot rolling by using a phi 250mm multiplied by 2 mm/phi 200mm multiplied by 5mm wire hot rolling mill, heating the square billet to 1180 +/-10 ℃, performing initial rolling at 1150 ℃, performing final rolling at 1000 ℃, performing 13-pass rolling, and rolling the square billet from 40mm to a phi 8mm wire rod;
step 4, cold drawing:
(1) and annealing the wire rod in a box-type silicon-carbon rod furnace, wherein the annealing temperature is 1100 ℃, and the annealing temperature is kept for 30min and then water cooling or air cooling is carried out to the room temperature.
(2) Pickling the annealed wire rod to remove residual oxide skin, pits and pit defects on the surface, and using aqueous solution of nitric acid and hydrochloric acid as pickling solution, wherein the volume ratio of the pickling solution is HNO3:HCl:H2O is 1:3:6, the pickling temperature is 80 ℃, the wire rod is turned over up and down during pickling, the surface is observed, and over pickling is prevented; after acid washing is carried out until the surface is bright, washing the surface clean by high-pressure water, and finally drying the surface;
(3) cold-drawing the pickled wire rod, wherein the cold-drawing deformation of the wire rod is controlled to be 14-19%, so that the phenomena of galling and end breakage in drawing are avoided, and the problem of large accessory tensile stress on the surface caused by uneven deformation of the center and the surface of the wire rod is avoided;
(4) pickling the cold-drawn wire rod, wherein the volume ratio of the pickling solution is HNO3:HCl:H2O is 1:3:6, the pickling temperature is 80 ℃, the wire rod is turned over up and down during pickling, the surface is observed, and over pickling is prevented; after acid cleaning is carried out until the surface is bright, washing the surface clean by high-pressure water, and finally drying the surface;
(5) and (4) repeating the operations from the step (1) to the step (4) for 1-3 times, and controlling the total deformation amount to be 40-45% to obtain the finished welding wire with the diameter phi of 1.0-2.0 mm.
In the present example, a Gleeble-1500 experimental machine was used to perform a thermoplastic analysis on the alloy ingot made in step 1, as shown in table 1.
TABLE 1 alloy ingot thermoplasticity
| |
800 | 850 | 900 | 950 | 1000 | 1050 |
| Ultimate |
30 | 35 | 38 | 40 | 45 | 40 |
| Resistance to deformation kg | 7200 | 6200 | 6200 | 6200 | 5900 | 4000 |
| |
1100 | 1150 | 1200 | 1250 | 1275 | 1300 |
| Ultimate |
40 | 37 | 37 | 37 | 33 | 6 |
| Resistance to deformation kg | 3200 | 2700 | 2300 | 1300 | 1300 | 500 |
The data in table 1 are plotted into a relation curve of the ultimate deformation, the deformation resistance and the test temperature of the alloy cast ingot, as shown in fig. 3, the graph shows that the alloy has good plasticity at 950-1250 ℃, has lower deformation resistance at 1050-1250 ℃ and has the optimal deformation temperature of 1100-1180 ℃.
In this example, microstructure observation of the alloy ingot prepared in step 1 was performed, and the microstructure of the alloy ingot was dense, and the degree of cleanliness was 1 to 2, as shown in fig. 4 and 5. Cr, Mo and Mn contained in the alloy are solid solution strengthening elements, so that the structure of the alloy in a solid solution treatment state is that primary carbide M6C is distributed on a gamma matrix, and the grain size is 3 grades after the solid solution treatment at 1150 ℃ for 1h, as shown in figure 6; after the solution treatment and the aging treatment, secondary carbide M6C particles are precipitated from the alloy along the grain boundary.
This example tests the annealed of step 4
The tensile strength of the wire after cold drawing with different deformation amounts is shown in table 2, and the tensile strength of the wire increases with the increase of the deformation amount. But even when the deformation reaches 47%, the tensile strength is still within the range allowed by the standard. According to the requirements of technical conditions and actual use conditions, the alloy welding wire is mainly used for manual argon arc welding at present, the strength of the welding wire can be controlled according to the upper limit allowed to be reached, and the welding wire can be in a cold-work hardening stateAnd (7) delivery.
TABLE 2 tensile Strength after Cold drawing at different deformation
Cold drawn state at 47% deformation by test
The strength of the wire after the wire was subjected to different heat treatment regimes and the results are shown in table 3.
TABLE 3 Strength of the treated welding wire according to different heat treatment regimes
In this embodiment, mechanical properties of the finished welding wire are tested, and room temperature tensile strength of the welding wires with different specifications is shown in table 4.
TABLE 4 tensile Strength at Room temperature of the welding wires
In the embodiment, the prepared welding wire is applied to welding of the casing made of age-hardening alloy with the mass content of 2% of aluminum and 1.2% of titanium. During trial welding, the weldment is arranged on the cooling copper base plate, and the lap weld is in a continuous through-welding state. Firstly, spot welding is carried out for fixation, and then fusion welding is carried out. The welding parameters are as follows: welding current: (40-50) A, welding speed: 60mm/min, tungsten electrode diameter:
nozzle diameter:
protective gas flow: (8L-10L)/min. Visual inspection was performed two hours after welding. The evaluation method comprises the following steps: the average crack rate CR is grade 1 when less than 15%, grade 2 when CR is 15-30%, and grade 3 when CR > 30%.
The results of the cross lap joint crack resistance test are shown in table 5; as shown by the results of the cross lap cracking resistance test, the welding wire is adopted
The crack rates of the welded samples are all 0; the welding wire is adopted
The crack rates of the welded specimens were all 5%. The crack rate is less than 15%, the crack resistance is first grade, and the weldability is good.
TABLE 5 Cross Lap Joint crack resistance test results
The butt joint performance test welding parameters were set and are shown in table 6.
TABLE 6 Butt joint Performance test welding parameters
And (3) testing the mechanical property of the butt joint according to the test result of the mechanical property of the butt joint, wherein the welding test piece is inspected by X-rays, and the welding test pieces for testing the mechanical property of the butt joint are qualified test pieces which are inspected by the X-rays. a) The mechanical property test result of the joint (the welding test piece is tested after heat treatment), the heat treatment system of the welding parts: before welding: quenching at 1100-1140 deg.c and air cooling;
after welding: annealing at 950 ℃ for 3-5 h, and air cooling; aging at 800 deg.C for 5-10 h, and air cooling. The mechanical properties of the test pieces after being welded, annealed at 950 ℃ for 3h, air-cooled and aged at 800 ℃ for 7h and air-cooled heat treatment are shown in Table 7.
TABLE 7 room temperature tensile Properties of the joints
The welded butt-joint test piece is subjected to a high-temperature endurance test at 800 ℃ for 100h, and then a metallographic specimen is ground by a joint, and metallographic observation is shown in fig. 7. According to the metallographic structure picture, the growth phenomenon of crystal grains is not found in the welding joint base metal, the grain boundary thickening and overburning structure is not generated in the semi-fusion zone, the welding joint metal crystals are dendritic, and the dendritic crystals are uniformly and finely arranged. No metallurgical defects were found. The grain size of the welding wire near seam area is 6-7 grades, and is consistent with the 6-7 grades of base metal tissues.
The metallographic structure of the joint after the high-temperature endurance test at 800 ℃ for 100h is shown in FIG. 8, and the comparison shows that the metallographic structures of the joint before and after the endurance test are compared, and the structure of the near seam region and the structure of the weld seam have no obvious change.
Example 2
A welding wire for welding a cartridge receiver, which comprises the following components: 0.056 wt%, Cr: 15.08 wt%, Mo: 15.06 wt%, Fe: 0.06 wt%, Si: 0.06 wt%, Mn: 1.14 wt%, S: less than or equal to 0.002 wt%, P: 0.008 wt% and the balance Ni; the gas element content of the welding wire is less than or equal to 0.0017 wt% of O, less than or equal to 0.0018 wt% of N and less than or equal to 0.0002 wt% of H;
when the diameter of the welding wire is phi 1.0mm, the tensile strength of the welding wire is 1490-1500 Mpa, the welding crack rate is 0%, and the tensile strength of a welding joint is more than or equal to 1200 Mpa; when the diameter of the welding wire is phi 1.6mm, the tensile strength of the welding wire is 1400 Mpa-1420 Mpa, the welding crack rate is 5%, and the tensile strength of a welding joint is more than or equal to 1200 Mpa.
The preparation method of the welding wire for welding the casing comprises the following steps of:
(1) weighing raw materials according to the element components of the welding wire, and smelting by using a 25kg vacuum induction furnace; during material distribution, firstly, a nickel plate with the mass of 60% is filled in the bottom layer of the crucible, then metal Cr and Mo strips are filled in the bottom layer of the crucible, and finally, the nickel plate with the residual mass of 40% is added in the bottom layer of the crucible; C. adding Mn auxiliary materials from a small stock bin;
(2) after the furnace burden is distributed, vacuumizing the vacuum induction furnace, when the pressure in the furnace is less than 2Pa, transmitting power to start smelting, after the raw materials are molten, heating to 1550 ℃, and refining for 15 min;
(3) casting under vacuum condition after refining, controlling the casting temperature at 1465 ℃, and removing the alloy cast ingot after casting for 30 min;
(1) peeling off the alloy ingot to remove surface defects, then sending the alloy ingot to a heating furnace for heating, controlling the charging temperature of the alloy ingot at 650 ℃, heating to 1170 ℃ after heating for 3-4 h, and keeping the temperature for 1.5 h;
(2) then, forging the alloy cast ingot on a 750kg air hammer, wherein the forging starting temperature is 1130 ℃, the finish forging temperature is 1000 ℃, and the reburning time is 20 min; when forging, firstly, quickly hammering by a light hammer, after deformation is generated, hammering by a heavy hammer, forging the alloy cast ingot into a square billet of 40mm multiplied by 1200mm, and then air-cooling to room temperature;
step 3, hot rolling:
polishing the surface of a square billet, removing surface oxide skin and defects, performing hot rolling by using a phi 250mm multiplied by 2 mm/phi 200mm multiplied by 5mm wire hot rolling mill, heating the square billet to 1180 +/-10 ℃, performing initial rolling at 1150 ℃, performing final rolling at 1000 ℃, performing 13-pass rolling, and rolling the square billet from 40mm to a phi 8mm wire rod;
step 4, cold drawing:
(1) and annealing the wire rod in a box-type silicon-carbon rod furnace, keeping the annealing temperature at 1100 ℃ for 25min, and then cooling the wire rod to room temperature by water or air.
(2) Pickling the annealed wire rod to remove residual oxide skin, pits and pit defects on the surface, and using aqueous solution of nitric acid and hydrochloric acid as pickling solution, wherein the volume ratio of the pickling solution is HNO3:HCl:H2O is 1:3:6, the pickling temperature is 80 ℃, the wire rod is turned over up and down during pickling, the surface is observed, and over pickling is prevented; after acid washing is carried out until the surface is bright, washing the surface clean by high-pressure water, and finally drying the surface;
(3) cold-drawing the pickled wire rod, wherein the cold-drawing deformation of the wire rod is controlled to be 14-19%, so that the phenomena of galling and end breakage in drawing are avoided, and the problem of large accessory tensile stress on the surface caused by uneven deformation of the center and the surface of the wire rod is avoided;
(4) pickling the cold-drawn wire rod, wherein the volume ratio of the pickling solution is HNO3:HCl:H2O is 1:3:6, the pickling temperature is 80 ℃, the wire rod is turned over up and down during pickling, the surface is observed, and over pickling is prevented; after acid washing is carried out until the surface is bright, washing the surface clean by high-pressure water, and finally drying the surface;
(5) and (4) repeating the operations from the step (1) to the step (4) for 1-3 times, and controlling the total deformation amount to be 40-45% to obtain the finished welding wire with the diameter phi of 1.0-2.0 mm.
The welding wire for welding the casing is applied to welding of the casing made of age-hardening alloy with the mass content of 2-2.5% of aluminum and 1-1.5% of titanium.
Example 3
A welding wire for welding a cartridge receiver, which comprises the following components: 0.06 wt%, Cr: 16 wt%, Mo: 16 wt%, Fe: 0.8 wt%, Si: 0.4 wt%, Mn: 1.8 wt%, S: 0.01 wt%, P: 0.01 wt%, the balance being Ni; the gas element content of the welding wire is less than or equal to 0.0017 wt% of O, less than or equal to 0.0018 wt% of N and less than or equal to 0.0002 wt% of H;
when the diameter of the welding wire is phi 1.0mm, the tensile strength of the welding wire is 1490-1500 Mpa, the welding crack rate is 0%, and the tensile strength of a welding joint is more than or equal to 1200 Mpa; when the diameter of the welding wire is phi 1.6mm, the tensile strength of the welding wire is 1400 Mpa-1420 Mpa, the welding crack rate is 5%, and the tensile strength of a welding joint is more than or equal to 1200 Mpa.
The preparation method of the welding wire for welding the casing comprises the following steps of:
(1) weighing raw materials according to the element components of the welding wire, and smelting by using a 200kg vacuum induction furnace; during material distribution, firstly, a nickel plate with the mass of 40% is filled in the bottom layer of the crucible, then metal Cr and Mo strips are filled in the bottom layer of the crucible, and finally, the nickel plate with the residual mass of 60% is added in the bottom layer of the crucible; C. adding Mn auxiliary materials from a small stock bin;
(2) after the furnace burden is distributed, vacuumizing the vacuum induction furnace, when the pressure in the furnace is less than 2Pa, transmitting power to start smelting, after the raw materials are molten, heating to 1550 ℃, and refining for 10 min;
(3) casting under vacuum condition after refining, controlling the casting temperature at 1465 ℃, and removing the alloy cast ingot after casting for 30 min;
(1) peeling off the alloy ingot to remove surface defects, then sending the alloy ingot to a heating furnace for heating, controlling the charging temperature of the alloy ingot at 650 ℃, heating to 1170 ℃ after heating for 3-4 h, and keeping the temperature for 1 h;
(2) then, forging the alloy cast ingot on a 750kg air hammer, wherein the forging starting temperature is 1100 ℃, the finish forging temperature is 1005 ℃, and the reburning time is 30 min; when forging, firstly, quickly hammering by a light hammer, after deformation is generated, hammering by a heavy hammer, forging the alloy cast ingot into a square billet of 40mm multiplied by 1200mm, and then air-cooling to room temperature;
step 3, hot rolling:
polishing the surface of a square billet, removing surface oxide skin and defects, performing hot rolling by using a phi 250mm multiplied by 2 mm/phi 200mm multiplied by 5mm wire hot rolling mill, heating the square billet to 1180 +/-10 ℃, performing initial rolling at 1150 ℃, performing final rolling at 1000 ℃, performing 13-pass rolling, and rolling the square billet from 40mm to a phi 8mm wire rod;
step 4, cold drawing:
(1) and annealing the wire rod in a box-type silicon-carbon rod furnace, wherein the annealing temperature is 1100 ℃, and the annealing temperature is kept for 30min and then water cooling or air cooling is carried out to the room temperature.
(2) Pickling the annealed wire rod to remove residual oxide skin, pits and pit defects on the surface, and using aqueous solution of nitric acid and hydrochloric acid as pickling solution, wherein the volume ratio of the pickling solution is HNO3:HCl:H2O is 1:3:6, the pickling temperature is 80 ℃, the wire rod is turned over up and down during pickling, the surface is observed, and over pickling is prevented; after acid washing is carried out until the surface is bright, washing the surface clean by high-pressure water, and finally drying the surface;
(3) cold-drawing the pickled wire rod, wherein the cold-drawing deformation of the wire rod is controlled to be 14-19%, so that the phenomena of galling and end breakage in drawing are avoided, and the problem of large accessory tensile stress on the surface caused by uneven deformation of the center and the surface of the wire rod is avoided;
(4) pickling the cold-drawn wire rod, wherein the volume ratio of the pickling solution is HNO3:HCl:H2O is 1:3:6, the pickling temperature is 80 ℃, the wire rod is turned over up and down during pickling, the surface is observed, and over pickling is prevented; after acid washing is carried out until the surface is bright, washing the surface clean by high-pressure water, and finally drying the surface;
(5) and (4) repeating the operations from the step (1) to the step (4) for 1-3 times, and controlling the total deformation amount to be 40-45% to obtain the finished welding wire with the diameter phi of 1.0-2.0 mm.
The welding wire for welding the casing is applied to welding of the casing made of age-hardening alloy with the mass content of 2-2.5% of aluminum and 1-1.5% of titanium.
Example 4
A welding wire for welding a cartridge receiver, which comprises the following components: 0.03 wt%, Cr: 15 wt%, Mo: 14 wt%, Fe: 0.05 wt%, Si: less than or equal to 0.02 wt%, Mn: 1 wt%, S: 0.008 wt%, P: 0.004 wt%, and the balance of Ni; the gas element content of the welding wire is less than or equal to 0.0017 wt% of O, less than or equal to 0.0018 wt% of N and less than or equal to 0.0002 wt% of H;
when the diameter of the welding wire is phi 1.0mm, the tensile strength of the welding wire is 1490 MPa-1500 MPa, the welding crack rate is 0%, and the tensile strength of a welding joint is more than or equal to 1200 MPa; when the diameter of the welding wire is phi 1.6mm, the tensile strength of the welding wire is 1400 Mpa-1420 Mpa, the welding crack rate is 5%, and the tensile strength of a welding joint is more than or equal to 1200 Mpa.
The preparation method of the welding wire for welding the casing comprises the following steps of:
(1) weighing raw materials according to the element components of the welding wire, and smelting by using a 200kg vacuum induction furnace; during material distribution, firstly, a nickel plate with the mass of 45% is filled in the bottom layer of the crucible, then metal Cr and Mo strips are filled in the crucible, and finally, the nickel plate with the residual mass of 55% is added; C. adding Mn auxiliary materials from a small stock bin;
(2) after the furnace burden is distributed, vacuumizing the vacuum induction furnace, when the pressure in the furnace is less than 2Pa, transmitting power to start smelting, after the raw materials are molten, heating to 1530 ℃, and refining for 15 min;
(3) casting under vacuum condition after refining, controlling the casting temperature at 1465 ℃, and removing the alloy cast ingot after casting for 30 min;
(1) peeling off the alloy ingot to remove surface defects, then sending the alloy ingot to a heating furnace for heating, controlling the temperature of the alloy ingot in the furnace to be 700 ℃, heating for 3-4 h, then keeping the temperature to 1170 ℃, and keeping the temperature for 1.5 h;
(2) then, forging the alloy cast ingot on a 750kg air hammer, wherein the forging starting temperature is 1130 ℃, the finish forging temperature is 1000 ℃, and the reburning time is 25 min; when forging, firstly, quickly hammering by a light hammer, after deformation is generated, hammering by a heavy hammer, forging the alloy cast ingot into a square billet of 40mm multiplied by 1200mm, and then air-cooling to room temperature;
step 3, hot rolling:
polishing the surface of a square billet, removing surface oxide skin and defects, performing hot rolling by using a phi 250mm multiplied by 2 mm/phi 200mm multiplied by 5mm wire hot rolling mill, heating the square billet to 1180 +/-10 ℃, performing initial rolling at 1150 ℃, performing final rolling at 1010 ℃, performing 13-pass rolling, and rolling the square billet from 40mm to a phi 8mm wire rod;
step 4, cold drawing:
(1) and annealing the wire rod in a box-type silicon-carbon rod furnace, keeping the annealing temperature at 1100 ℃ for 25min, and then cooling the wire rod to room temperature by water or air.
(2) Pickling the annealed wire rod to remove residual oxide skin, pits and pit defects on the surface, and using aqueous solution of nitric acid and hydrochloric acid as pickling solution, wherein the volume ratio of the pickling solution is HNO3:HCl:H2O is 1:3:6, the pickling temperature is 80 ℃, the wire rod is turned over up and down during pickling, the surface is observed, and over pickling is prevented; after acid cleaning is carried out until the surface is bright, washing the surface clean by high-pressure water, and finally drying the surface;
(3) cold-drawing the pickled wire rod, wherein the cold-drawing deformation of the wire rod is controlled to be 14-19%, so that the phenomena of galling and end breakage in drawing are avoided, and the problem of large accessory tensile stress on the surface caused by uneven deformation of the center and the surface of the wire rod is avoided;
(4) will be provided withPickling the cold-drawn wire rod, wherein the volume ratio of the pickling solution is HNO3:HCl:H2O is 1:3:6, the pickling temperature is 80 ℃, the wire rod is turned over up and down during pickling, the surface is observed, and over pickling is prevented; after acid washing is carried out until the surface is bright, washing the surface clean by high-pressure water, and finally drying the surface;
(5) and (4) repeating the operations from the step (1) to the step (4) for 1-3 times, and controlling the total deformation amount to be 40-45% to obtain the finished welding wire with the diameter phi of 1.0-2.0 mm.
The welding wire for welding the casing is applied to welding of the casing made of age-hardening alloy with the mass content of 2-2.5% of aluminum and 1-1.5% of titanium.
Example 5
A welding wire for welding a cartridge receiver, which comprises the following components: 0.045 wt%, Cr: 15.5 wt%, Mo: 15 wt%, Fe: 0.5 wt%, Si: 0.25 wt%, Mn: 1.5 wt%, S: 0.015 wt%, P: 0.015 wt%, the balance being Ni; the gas element content of the welding wire is less than or equal to 0.0017 wt% of O, less than or equal to 0.0018 wt% of N and less than or equal to 0.0002 wt% of H;
when the diameter of the welding wire is phi 1.0mm, the tensile strength of the welding wire is 1490-1500 Mpa, the welding crack rate is 0%, and the tensile strength of a welding joint is more than or equal to 1200 Mpa; when the diameter of the welding wire is phi 1.6mm, the tensile strength of the welding wire is 1400 Mpa-1420 Mpa, the welding crack rate is 5%, and the tensile strength of a welding joint is more than or equal to 1200 Mpa.
The preparation method of the welding wire for welding the casing comprises the following steps of:
(1) weighing raw materials according to the element components of the welding wire, and smelting by using a 25kg vacuum induction furnace; during material distribution, firstly, a nickel plate with the mass of 55% is loaded on the bottom layer of the crucible, then metal Cr and Mo strips are loaded, and finally, the nickel plate with the residual mass of 45% is added; C. adding Mn auxiliary materials from a small stock bin;
(2) after the furnace burden is distributed, vacuumizing the vacuum induction furnace, when the pressure in the furnace is less than 2Pa, transmitting power to start smelting, after the raw materials are molten, heating to 1550 ℃, and refining for 15 min;
(3) casting under vacuum condition after refining, controlling the casting temperature at 1465 ℃, and removing the alloy cast ingot after casting for 30 min;
(1) peeling off the alloy ingot to remove surface defects, then sending the alloy ingot to a heating furnace for heating, controlling the temperature of the alloy ingot in the furnace to be 700 ℃, heating for 3-4 h, then keeping the temperature to 1170 ℃, and keeping the temperature for 2 h;
(2) then, forging the alloy cast ingot on a 750kg air hammer, wherein the open forging temperature is 1100 ℃, the finish forging temperature is 1000 ℃, and the reburning time is 20 min; when forging, firstly, quickly hammering by a light hammer, after deformation is generated, hammering by a heavy hammer, forging the alloy cast ingot into a square billet of 40mm multiplied by 1200mm, and then air-cooling to room temperature;
step 3, hot rolling:
polishing the surface of a square billet, removing surface oxide skin and defects, performing hot rolling by using a phi 250mm multiplied by 2 mm/phi 200mm multiplied by 5mm wire hot rolling mill, heating the square billet to 1180 +/-10 ℃, performing initial rolling at 1150 ℃, performing final rolling at 1000 ℃, performing 13-pass rolling, and rolling the square billet from 40mm to a phi 8mm wire rod;
step 4, cold drawing:
(1) and annealing the wire rod in a box-type silicon-carbon rod furnace, keeping the annealing temperature at 1100 ℃ for 10min, and then cooling the wire rod to room temperature by water or air.
(2) Pickling the annealed wire rod to remove residual oxide skin, pits and pit defects on the surface, and using aqueous solution of nitric acid and hydrochloric acid as pickling solution, wherein the volume ratio of the pickling solution is HNO3:HCl:H2O is 1:3:6, the pickling temperature is 80 ℃, the wire rod is turned over up and down during pickling, the surface is observed, and over pickling is prevented; after acid washing is carried out until the surface is bright, washing the surface clean by high-pressure water, and finally drying the surface;
(3) cold-drawing the pickled wire rod, wherein the cold-drawing deformation of the wire rod is controlled to be 14-19%, so that the phenomena of galling and end breakage in drawing are avoided, and the problem of large accessory tensile stress on the surface caused by uneven deformation of the center and the surface of the wire rod is avoided;
(4) pickling the cold-drawn wire rod, wherein the volume ratio of the pickling solution is HNO3:HCl:H2O is 1:3:6, the pickling temperature is 80 ℃, the wire rod is turned over up and down during pickling, the surface is observed, and over pickling is prevented; after acid washing is carried out until the surface is bright, washing the surface clean by high-pressure water, and finally drying the surface;
(5) and (4) repeating the operations from the step (1) to the step (4) for 1-3 times, and controlling the total deformation amount to be 40-45% to obtain the finished welding wire with the diameter phi of 1.0-2.0 mm.
The welding wire for welding the casing is applied to welding of the casing made of age-hardening alloy with the mass content of 2-2.5% of aluminum and 1-1.5% of titanium.
Claims (4)
1. A welding wire for welding a cartridge case is characterized in that the element composition of the welding wire is as follows: 0.03 to 0.06 wt%, Cr: 15-16 wt%, Mo: 14-15.06 wt%, Fe is more than or equal to 0.05% and less than or equal to 1 wt%, Si: less than or equal to 0.5 wt%, Mn: 1-2 wt%, S: less than or equal to 0.015 wt%, P: less than or equal to 0.015wt percent, and the balance being Ni; the gas element content of the welding wire is less than or equal to 0.0017 wt% of O, less than or equal to 0.0018 wt% of N and less than or equal to 0.0002 wt% of H; when the diameter of the welding wire is phi 1.0mm, the tensile strength of the welding wire is 1490-1500 Mpa, the welding crack rate is 0%, and the tensile strength of a welding joint is more than or equal to 1200 Mpa; when the diameter of the welding wire is phi 1.6mm, the tensile strength of the welding wire is 1400 Mpa-1420 Mpa, the welding crack rate is 5%, and the tensile strength of a welding joint is more than or equal to 1200 Mpa; the welding wire is applied to welding of an age hardening alloy casing part with the mass content of 2-2.5% of aluminum and 1-1.5% of titanium;
the preparation method comprises the following steps:
step 1, alloy smelting:
(1) weighing raw materials according to the element components of the welding wire, and smelting by using a vacuum induction furnace; during material distribution, firstly, a nickel plate with the mass of 40-60% is loaded on the bottom layer of the crucible, then metal Cr and Mo strips are loaded, and finally, the nickel plate with the residual mass of 40-60% is added; C. adding Mn auxiliary materials from a small stock bin;
(2) after the furnace burden is distributed, vacuumizing the vacuum induction furnace, when the pressure in the furnace is less than 2Pa, transmitting power to start smelting, after the raw materials are molten, heating to 1500-1550 ℃, and refining for 10-15 min;
(3) casting under vacuum condition after refining, controlling the casting temperature at 1465 ℃, and removing the alloy cast ingot after casting for 30 min;
step 2, forging:
(1) peeling off the alloy ingot to remove surface defects, then sending the alloy ingot to a heating furnace for heating, controlling the temperature of the alloy ingot in the furnace to be below 700 ℃, heating to 1170 ℃ after 3-4 h, and keeping the temperature for 1-2 h;
(2) then forging the alloy cast ingot, wherein the forging starting temperature is 1100-1150 ℃, the finish forging temperature is more than 1000 ℃, and the reburning time is 20-30 min; when forging, firstly, quickly hammering by a light hammer, hammering by the heavy hammer after deformation is generated, forging the alloy ingot into a square billet, and then cooling to room temperature by air;
step 3, hot rolling:
polishing the surface of the square billet, removing surface oxide skin and defects, performing hot rolling by using a hot rolling mill, heating the square billet to 1180 +/-10 ℃, rolling at the beginning temperature of 1150 ℃, rolling at the finishing temperature of more than 1000 ℃, and rolling to prepare the square billet into a wire rod; the rolling is 13-pass rolling; the wire rod is a wire rod with the diameter of 8 mm;
step 4, cold drawing:
(1) annealing the wire rod, wherein the annealing is carried out in a box-type silicon-carbon rod furnace, the annealing temperature is 1100 ℃, and the annealing is carried out after heat preservation for 10-30 min and then water cooling or air cooling is carried out to the room temperature;
(2) pickling the annealed wire rod to remove residual oxide skin, pits and pit defects on the surface, and using aqueous solution of nitric acid and hydrochloric acid as pickling solution, wherein the volume ratio of the pickling solution is HNO3:HCl:H2O is 1:3:6, the pickling temperature is 80-85 ℃, the wire rod is turned over up and down during pickling, the surface is observed, and over pickling is prevented; after acid washing is carried out until the surface is bright, washing the surface clean by high-pressure water, and finally drying the surface;
(3) cold-drawing the pickled wire rod, wherein the cold-drawing deformation of the wire rod is controlled to be 14-19%, so that the phenomena of galling and end breakage in drawing are avoided, and the problem of large accessory tensile stress on the surface caused by uneven deformation of the center and the surface of the wire rod is avoided;
(4) pickling the cold-drawn wire rod at the pickling temperature of 80-85 ℃, turning the wire rod up and down during pickling, observing the surface and preventing over-pickling; after acid washing is carried out until the surface is bright, washing the surface clean by high-pressure water, and finally drying the surface;
(5) and (4) repeating the operations from the step (1) to the step (4) for 1-3 times, and controlling the total deformation amount to be 40-45% to obtain the finished welding wire with the diameter phi of 1.0-2.0 mm.
2. The welding wire for a casing welding as set forth in claim 1, wherein in step 1(1) of the production method, the vacuum induction furnace is a 25kg or 200kg vacuum induction furnace.
3. A welding wire for casing welding according to claim 1, wherein in step 2(2) of the production method, the forging uses a 750kg air hammer; the square billet is 40mm multiplied by 1200 mm.
4. A welding wire for casing welding according to claim 1, wherein in step 3 of the production method, the hot rolling mill is a 250mm Φ x 2mm Φ 200mm x 5mm wire hot rolling mill.
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| JPS5456047A (en) * | 1977-10-12 | 1979-05-04 | Sumitomo Metal Ind Ltd | Metal piece to be inserted for welding austen-itic stainless steel |
| US4168188A (en) * | 1978-02-09 | 1979-09-18 | Cabot Corporation | Alloys resistant to localized corrosion, hydrogen sulfide stress cracking and stress corrosion cracking |
| JPS58132393A (en) * | 1982-01-30 | 1983-08-06 | Sumikin Yousetsubou Kk | Composite wire for welding 9% ni steel |
| CN107984054A (en) * | 2017-11-30 | 2018-05-04 | 钢铁研究总院 | Transition zone welding material and its welding method are docked in titanium steel composite board melting welding |
| CN110640353A (en) * | 2019-11-14 | 2020-01-03 | 攀钢集团江油长城特殊钢有限公司 | Welding wire material and preparation method thereof |
| CN111015019A (en) * | 2019-12-31 | 2020-04-17 | 江苏新华合金有限公司 | 00Cr20Mo16 welding wire and production process thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5456047A (en) * | 1977-10-12 | 1979-05-04 | Sumitomo Metal Ind Ltd | Metal piece to be inserted for welding austen-itic stainless steel |
| US4168188A (en) * | 1978-02-09 | 1979-09-18 | Cabot Corporation | Alloys resistant to localized corrosion, hydrogen sulfide stress cracking and stress corrosion cracking |
| JPS58132393A (en) * | 1982-01-30 | 1983-08-06 | Sumikin Yousetsubou Kk | Composite wire for welding 9% ni steel |
| CN107984054A (en) * | 2017-11-30 | 2018-05-04 | 钢铁研究总院 | Transition zone welding material and its welding method are docked in titanium steel composite board melting welding |
| CN110640353A (en) * | 2019-11-14 | 2020-01-03 | 攀钢集团江油长城特殊钢有限公司 | Welding wire material and preparation method thereof |
| CN111015019A (en) * | 2019-12-31 | 2020-04-17 | 江苏新华合金有限公司 | 00Cr20Mo16 welding wire and production process thereof |
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