CN113664341A - Welding method of large-size HSn62-1 tin brass - Google Patents
Welding method of large-size HSn62-1 tin brass Download PDFInfo
- Publication number
- CN113664341A CN113664341A CN202111008752.9A CN202111008752A CN113664341A CN 113664341 A CN113664341 A CN 113664341A CN 202111008752 A CN202111008752 A CN 202111008752A CN 113664341 A CN113664341 A CN 113664341A
- Authority
- CN
- China
- Prior art keywords
- welding
- hsn62
- tin brass
- alternating current
- brass
- 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.)
- Pending
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
- B23K9/00—Arc welding or cutting
- B23K9/16—Arc welding or cutting making use of shielding gas
- B23K9/167—Arc welding or cutting making use of shielding gas and of a non-consumable electrode
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/095—Monitoring or automatic control of welding parameters
- B23K9/0956—Monitoring or automatic control of welding parameters using sensing means, e.g. optical
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/235—Preliminary treatment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
-
- 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
- B23K2103/08—Non-ferrous metals or alloys
- B23K2103/12—Copper or alloys thereof
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Arc Welding In General (AREA)
Abstract
The invention discloses a method for welding large-size HSn62-1 tin brass, which comprises the following steps: firstly, processing a groove on an HSn62-1 tin brass parent metal and then carrying out surface treatment; secondly, heating and preserving heat of the HSn62-1 tin brass parent metal after surface treatment; thirdly, assembling the two heat-insulated HSn62-1 tin brass parent metals to obtain a piece to be welded; fourthly, performing manual alternating current tungsten argon arc welding on the part to be welded to obtain a welded part; and fifthly, removing welding stress of the welding part, carrying out heat treatment, discharging, pressing, shaping and cooling to obtain the HSn62-1 tin brass. According to the invention, the HSn62-1 tin brass parent metal is heated and insulated and then assembled for manual alternating current argon tungsten-arc welding, so that the temperature stability in the welding process is ensured, the generation of welding stress and the evaporation of zinc in the parent metal are reduced, the generation of defects such as cracks, air holes and the like is further reduced, the mechanical property of a welding line is ensured, and the welding cost and the labor intensity of welding personnel are reduced.
Description
Technical Field
The invention belongs to the field of brass welding and brass composite plate manufacturing, and particularly relates to a method for welding large-size HSn62-1 tin brass.
Background
The HSn62-1 tin brass is called as "navy brass", has a (alpha + beta) two-phase structure due to about 36% of zinc content, has excellent corrosion resistance and processability, further improves the corrosion resistance, easy cutting and weldability and good comprehensive mechanical property in seawater along with the addition of alloy elements such as tin in copper-zinc alloy, and is widely applied to a plurality of fields such as petrochemical industry, ships, offshore operation equipment, power equipment and the like. However, because a large amount of Zn is contained, and the boiling point of the Zn is only 907 ℃, the Zn element is oxidized into zinc oxide in the air in the traditional welding process, which not only hinders the observation and operation of a welder on a molten pool, but also causes the reduction of the mechanical property and the corrosion resistance of a welding joint, increases the sensitivity of a welding seam to stress corrosion, and causes serious influence on the health of the welder after long-time welding. Meanwhile, the HSn62-1 tin brass has higher thermal conductivity, the parent metal is difficult to melt, and the filler metal and the parent metal cannot be fused well; the linear expansion coefficient is large, the appearance molding is poor, and the deformation after welding is serious, so the welding difficulty is very high.
Disclosure of Invention
The invention aims to solve the technical problem of providing a method for welding large-specification HSn62-1 tin brass aiming at the defects of the prior art. According to the method, the HSn62-1 tin brass parent metal is heated and insulated and then assembled for manual alternating current argon tungsten-arc welding, so that the fusion of the parent metal and the stability of the temperature between welding layers in the welding process are guaranteed, the generation of welding stress is reduced, the welding temperature is effectively controlled, the evaporation of zinc in the parent metal is reduced, the generation of defects such as cracks and air holes is further reduced, the mechanical property of a welding seam is guaranteed, the problems of evaporation and burning loss of zinc and reduction of the mechanical property and the corrosion resistance of the welding seam caused by the welding of large-size HSn62-1 tin brass are solved, and the welding cost and the labor intensity of welding personnel are effectively reduced.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows: a method for welding large-specification HSn62-1 tin brass is characterized by comprising the following steps:
firstly, machining a groove on an HSn62-1 tin brass parent metal, and then carrying out surface treatment;
step two, heating and preserving heat of the HSn62-1 tin brass parent metal subjected to surface treatment in the step one; the heated temperature is 150-200 ℃, the heat preservation time is 0.5-1 h when the thickness of the HSn62-1 tin brass parent metal subjected to surface treatment is within 25mm, and the heat preservation time is increased by 0.5h when the thickness of the HSn62-1 tin brass parent metal subjected to surface treatment is more than 25 mm;
step three, assembling the two HSn62-1 tin brass parent metals subjected to heat preservation in the step two to form a Y-shaped groove, wherein the assembly gap of the Y-shaped groove is 3-4 mm, obtaining a piece to be welded, fixing a gas back protection device on the piece to be welded, and introducing argon;
step four, carrying out manual alternating current argon tungsten-arc welding on the to-be-welded part which is introduced with argon in the step three by adopting an alternating current argon tungsten-arc welding machine to obtain a welded part; the manual alternating current argon tungsten-arc welding adopts helium with the mass purity of 99.999% as protective gas, selects HS221 welding wires as welding materials, and the HS221 welding wires comprise the following components in percentage by mass: 58 to 62 percent of Cu, not more than 1.0 percent of Sn, not more than 0.3 percent of Mn, not more than 0.2 percent of Fe, 0.1 to 0.5 percent of Si, not more than 0.01 percent of Al, not more than 0.03 percent of Pb, not more than 0.2 percent of other components, and the balance of Zn;
step five, removing welding stress of the welding part obtained in the step four, carrying out heat treatment, taking the welding part out of the furnace, carrying out air medium pressure sizing, and cooling to room temperature to obtain HSn62-1 tin brass; the length and the width of the HSn62-1 tin brass are not less than 2000 mm.
The HSn62-1 tin brass parent metal after mechanical processing and surface treatment is heated and insulated to reduce the cooling speed of a welding line in the subsequent welding process, so that the overflow of diffused hydrogen in the welding line is facilitated, the temperature gradient of a welding joint is reduced, the fusion of the parent metal and the stability of the temperature between welding layers in the welding process are ensured, and the generation of welding stress is reduced; then assembling and carrying out manual alternating current argon tungsten-arc welding, utilizing the polarity periodic change characteristic of welding current in the manual alternating current argon tungsten-arc welding process, cleaning oxides on the surface of a molten pool and nearby weldment by adopting electric arc when the alternating current negative polarity is half cycle, concentrating the energy of the electric arc when the alternating current negative polarity is positive cycle, ensuring the depth of the molten pool, cooling a tungsten electrode and preventing tungsten from being added, thereby effectively controlling the welding temperature, reducing the evaporation of zinc in parent metal, further reducing the generation of defects such as cracks, air holes and the like, ensuring the mechanical property of a welding seam, reducing the heat input quantity, reducing the welding stress and deformation, simultaneously adopting high-purity helium gas of inert gas as welding protective gas, ensuring that the electric arc energy density of the helium is high, the ionization energy is as high as 24.6eV and is far higher than other gases, and the helium does not easily react with other metals and gases, further avoiding the oxidation of zinc element, the labor intensity of welding personnel is reduced.
The welding method of the large-specification HSn62-1 tin brass is characterized in that in the step one, the surface treatment is as follows: and wiping and cleaning by adopting ethanol solution to remove oil stains on the surface, and cleaning by adopting a stainless steel wire brush to remove the groove and an oxidation film and impurities within 50mm of the periphery of the groove. The surface treatment process effectively prevents welding defects such as air holes and the like caused by base metal pollution in the welding process, and ensures the quality of a welding joint.
The welding method of the large-size HSn62-1 tin brass is characterized in that in the third step, the mass purity of argon is 99.999%, and the flow of argon is 20-30L/min. The back shielding gas adopts 99.999 percent argon and limits the introduced flow to be 20L/min-30L/min, thereby effectively isolating the adverse effect of air on electric arc and a molten pool, fully protecting the back welding seam forming, being more economic compared with the front helium shielding gas and reducing the cost.
The welding method of the large-specification HSn62-1 tin brass is characterized in that the manual alternating current argon tungsten-arc welding process in the fourth step is as follows: firstly, forming a priming layer by adopting alternating current argon arc welding, wherein the adopted welding current is 180-190A, the welding voltage is 24-26V, the welding speed is 12-15 cm/min, and the flow of helium is 15-20L/min; then, alternating current argon arc welding is adopted to form a filling layer, the adopted welding current is 190A-200A, the welding voltage is 26V-30V, the welding speed is 12 cm/min-15 cm/min, and the flow of helium is 15L/min-20L/min; and forming a covering layer by adopting alternating current argon arc welding, wherein the adopted welding current is 190A-200A, the welding voltage is 26V-30V, the welding speed is 12 cm/min-15 cm/min, and the flow of helium is 15L/min-20L/min. The invention respectively selects the welding current, the welding voltage, the welding speed, the welding material and other process parameters at each stage of the manual alternating current argon tungsten-arc welding process, plays a synergistic role, ensures the component matching of welding seams, reduces the generation of welding defects such as cracks, air holes and the like, reduces the evaporation of zinc in the HSn62-1 tin brass parent metal, improves the forming of the welding seams, ensures the performance of the welding seams, reduces the welding deformation, overcomes the defects and the problems of poor welding quality, poor welding forming and large welding deformation in the existing large-size tin brass welding, and effectively reduces the cost of heat treatment and shape correction of welding joints.
The welding method of the large-size HSn62-1 tin brass is characterized in that in the step four, in the manual alternating current argon tungsten-arc welding process, the interlayer temperature of a piece to be welded is controlled to be not less than 200 ℃, and when the interlayer temperature is lower than 200 ℃, the welding seam and the two sides of the welding seam are continuously heated to 200 ℃ within 100mm at a heating speed of not more than 50 ℃/h. According to the invention, by adjusting the preheating temperature and controlling the interlayer temperature, the cooling speed of the welding seam of the copper plate in welding is reduced, the temperature gradient of a welding joint and the heat loss of a molten pool are reduced, the base metal and the filler metal reach the melting temperature in the welding process, and the defects of incomplete fusion, incomplete penetration, cold cracks and the like are prevented from being formed; meanwhile, the gas in the liquid molten pool is ensured to overflow, and defects such as air holes and the like are prevented from being formed.
The welding method of the large-specification HSn62-1 tin brass is characterized in that the interlayer temperature is measured by using a contact type measuring instrument. The contact-type measuring instrument can conveniently, visually and effectively measure the interlayer temperature and ensure the timely and accurate control of the interlayer temperature in the welding process.
The welding method of the large-specification HSn62-1 tin brass is characterized in that the manual alternating-current argon tungsten-arc welding in the fourth step adopts a short-arc and point-feeding continuous welding mode. The welding mode realizes arc striking and electric arc maintaining on the welding wire, the short arc has good stability, the electric arc energy is concentrated, the melting depth is large, the spot wire feeding avoids the electric arc from staying for a long time at a certain part to form a nodule, thereby not only ensuring the smooth operation of manual alternating current tungsten electrode argon arc welding, but also further improving the welding quality.
The welding method of the large-size HSn62-1 tin brass is characterized in that in the fifth step, the welding stress is removed in a continuous hammering mode, then the temperature is gradually increased to 200-300 ℃, and heat preservation is carried out for 1-2 hours for heat treatment. The invention adopts a continuous hammering mode after welding is finished, effectively eliminates welding stress, prevents the generation of defects such as cracks and the like, simultaneously combines heat treatment, reduces the post-heating temperature, shortens the heat preservation time, reduces the welding stress, solves the problems of large welding stress, poor welding forming, large welding deformation and the like caused by large expansion coefficient and soft material of copper, ensures the plate shape and the flatness of large-specification HSn62-1 tin brass after welding, and provides guarantee for the production of composite plates.
Compared with the prior art, the invention has the following advantages:
1. according to the invention, the HSn62-1 tin brass parent metal is subjected to heating and heat preservation after mechanical processing and surface treatment in sequence, so that the fusion of the parent metal and the stability of the temperature between welding layers in the welding process are ensured, the generation of welding stress is reduced, then the parent metal is assembled and subjected to manual alternating current argon tungsten-arc welding, the welding temperature is effectively controlled, the evaporation of zinc in the parent metal is reduced, the generation of defects such as cracks and air holes is further reduced, the mechanical property of a welding seam is ensured, the problems of evaporation and burning loss of zinc during the welding of large-specification HSn62-1 tin brass and the reduction of the mechanical property and corrosion resistance of the welding seam caused by the evaporation and burning loss of zinc are solved, meanwhile, the problems of the forming and post-welding deformation of the large-specification HSn62-1 tin brass welding seam are solved, and the welding cost and the labor intensity of welding personnel are effectively reduced.
2. Compared with gas welding, the invention adopts manual alternating current argon tungsten-arc welding, reduces the evaporation of zinc in the welding process, increases the penetration, increases the weldability of thick-specification base metal, ensures good weld formation, reduces the generation of welding defects, and further lightens the damage to welding personnel and the labor intensity.
3. Compared with the shielded metal arc welding, the manual alternating current argon tungsten-arc welding is adopted, so that the evaporation of zinc in the welding process is reduced, the consumption of welding materials is reduced, the heat input is reduced, the welding stress is reduced, the deformation is small, the good forming of a welding seam is ensured, the generation of welding defects is reduced, and the damage to welding personnel and the labor intensity are further reduced.
4. The invention solves the problem of the multilayer tailor-welding of the tin brass/steel composite plate, effectively increases the one-time production area of the composite plate, saves materials, reduces the production cost and improves the production efficiency of the composite plate.
Drawings
FIG. 1 is a schematic view of the connection of a part to be welded and a gas back protection device according to the present invention.
Description of reference numerals:
1-gas back protection device; 2, introducing argon into the groove; 3, a part to be welded.
Detailed Description
As shown in fig. 1, the gas back protection device 1 of the invention is fixed on the back of the workpiece to be welded 3, and an argon gas inlet groove 2 is formed in the gas back protection device 1 corresponding to the Y-shaped groove of the workpiece to be welded 3.
Example 1
The embodiment comprises the following steps:
firstly, machining a bevel on an HSn62-1 tin brass parent metal with the specification (thickness multiplied by width multiplied by length) of 6mm multiplied by 2000mm multiplied by 4100mm, and then carrying out surface treatment: cleaning and removing oil stains on the surface by adopting ethanol solution, and cleaning and removing the groove and an oxidation film and impurities in the periphery of the groove within 50mm by adopting a stainless steel wire brush;
step two, heating and preserving heat of the HSn62-1 tin brass parent metal subjected to surface treatment in the step one; the temperature after heating is 200 ℃, and the heat preservation time is 1 h;
step three, assembling the two HSn62-1 tin brass parent metals subjected to heat preservation in the step two to form a Y-shaped groove, wherein the assembly gap of the Y-shaped groove is 4mm, obtaining a piece to be welded, fixing a gas back protection device on the piece to be welded, and introducing argon; the mass purity of the argon is 99.999 percent, and the flow of introducing the argon is 30L/min;
step four, carrying out manual alternating current argon tungsten-arc welding on the to-be-welded part which is introduced with argon in the step three by adopting an alternating current argon tungsten-arc welding machine to obtain a welded part; the manual alternating current argon tungsten-arc welding adopts helium with the mass purity of 99.999% as protective gas, HS221 welding wires with the diameter of 2.4mm are selected as welding materials, and the HS221 welding wires comprise the following components in percentage by mass: 60.02% of Cu, 0.95% of Sn, 0.002% of Mn, 0.001% of Fe, 0.31% of Si, 0.001% of Al, 0.001% of Pb, no more than 0.2% of other components and the balance of Zn;
the manual alternating current tungsten electrode argon arc welding process comprises the following steps: firstly, forming a priming layer by adopting alternating current argon arc welding, wherein the adopted welding current is 190A, the welding voltage is 26V, the welding speed is 15cm/min, and the flow of helium is 20L/min; then, alternating current argon arc welding is adopted to form a filling layer, the adopted welding current is 200A, the welding voltage is 30V, the welding speed is 15cm/min, and the flow of helium is 20L/min; forming a covering layer by adopting alternating current argon arc welding, wherein the adopted welding current is 200A, the welding voltage is 30V, the welding speed is 15cm/min, and the flow of helium is 20L/min;
in the manual alternating current argon tungsten-arc welding process, a contact type measuring instrument is adopted for measuring, the interlayer temperature of a piece to be welded is controlled to be not less than 200 ℃, and when the interlayer temperature is lower than 200 ℃, the welding seam and the two sides of the welding seam are continuously heated to 200 ℃ within 100mm at a heating speed of not more than 50 ℃/h;
the manual alternating current argon tungsten-arc welding adopts a short-arc and point-fed continuous welding mode;
and step five, removing welding stress of the welding part obtained in the step four by adopting a continuous hammering mode, then gradually heating to 300 ℃, preserving heat for 2 hours for heat treatment, taking out of the furnace, carrying out air pressure sizing, and then cooling to room temperature to obtain the HSn62-1 tin brass with the size (thickness multiplied by width multiplied by length) of 6mm multiplied by 4000mm multiplied by 4100 mm.
Example 2
The embodiment comprises the following steps:
firstly, machining a groove on an HSn62-1 tin brass parent metal with the specification (thickness multiplied by width multiplied by length) of 3mm multiplied by 1500mm multiplied by 4000mm, and then carrying out surface treatment: cleaning and removing oil stains on the surface by adopting ethanol solution, and cleaning and removing the groove and an oxidation film and impurities in the periphery of the groove within 50mm by adopting a stainless steel wire brush;
step two, heating and preserving heat of the HSn62-1 tin brass parent metal subjected to surface treatment in the step one; the temperature after heating is 150 ℃, and the heat preservation time is 0.5 h;
step three, assembling the two HSn62-1 tin brass parent metals subjected to heat preservation in the step two to form a Y-shaped groove, wherein the assembly gap of the Y-shaped groove is 3mm, obtaining a piece to be welded, fixing a gas back protection device on the piece to be welded, and introducing argon; the mass purity of the argon is 99.999 percent, and the flow of introducing the argon is 20L/min;
step four, carrying out manual alternating current argon tungsten-arc welding on the to-be-welded part which is introduced with argon in the step three by adopting an alternating current argon tungsten-arc welding machine to obtain a welded part; the manual alternating current argon tungsten-arc welding adopts helium with the mass purity of 99.999% as protective gas, HS221 welding wires with the diameter of 2.0mm are selected as welding materials, and the HS221 welding wires comprise the following components in percentage by mass: cu 59.28%, Sn 0.91%, Mn 0.0014%, Fe 0.001%, Si 0.21%, Al 0.001%, Pb 0.001%, other components not more than 0.2%, and Zn in balance;
the manual alternating current tungsten electrode argon arc welding process comprises the following steps: firstly, forming a priming layer by adopting alternating current argon arc welding, wherein the adopted welding current is 180A, the welding voltage is 24V, the welding speed is 12cm/min, and the flow of helium is 15L/min; then, alternating current argon arc welding is adopted to form a filling layer, the adopted welding current is 190A, the welding voltage is 26V, the welding speed is 12cm/min, and the flow of helium is 15L/min; forming a covering layer by adopting alternating current argon arc welding, wherein the adopted welding current is 190A, the welding voltage is 26V, the welding speed is 12cm/min, and the flow of helium is 15L/min;
in the manual alternating current argon tungsten-arc welding process, a contact type measuring instrument is adopted for measuring, the interlayer temperature of a piece to be welded is controlled to be not less than 200 ℃, and when the interlayer temperature is lower than 200 ℃, the welding seam and the two sides of the welding seam are continuously heated to 200 ℃ within 100mm at a heating speed of not more than 50 ℃/h;
the manual alternating current argon tungsten-arc welding adopts a short-arc and point-fed continuous welding mode;
and step five, removing welding stress of the welding part obtained in the step four by adopting a continuous hammering mode, then gradually heating to 200 ℃, preserving heat for 1 hour for heat treatment, taking out of the furnace, carrying out air pressure sizing, and then cooling to room temperature to obtain the HSn62-1 tin brass with the size (thickness multiplied by width multiplied by length) of 3mm multiplied by 3000mm multiplied by 4000 mm.
Example 3
The embodiment comprises the following steps:
firstly, machining a groove on an HSn62-1 tin brass parent metal with the specification (thickness multiplied by width multiplied by length) of 5mm multiplied by 1000mm multiplied by 2000mm, and then carrying out surface treatment: cleaning and removing oil stains on the surface by adopting ethanol solution, and cleaning and removing the groove and an oxidation film and impurities in the periphery of the groove within 50mm by adopting a stainless steel wire brush;
step two, heating and preserving heat of the HSn62-1 tin brass parent metal subjected to surface treatment in the step one; the temperature after heating is 180 ℃, and the heat preservation time is 0.8 h;
step three, assembling the two HSn62-1 tin brass parent metals subjected to heat preservation in the step two to form a Y-shaped groove, wherein the assembly gap of the Y-shaped groove is 3mm, obtaining a piece to be welded, fixing a gas back protection device on the piece to be welded, and introducing argon; the mass purity of the argon is 99.999 percent, and the flow of introducing the argon is 25L/min;
step four, carrying out manual alternating current argon tungsten-arc welding on the to-be-welded part which is introduced with argon in the step three by adopting an alternating current argon tungsten-arc welding machine to obtain a welded part; the manual alternating current argon tungsten-arc welding adopts helium with the mass purity of 99.999% as protective gas, HS221 welding wires with the diameter of 2.4mm are selected as welding materials, and the HS221 welding wires comprise the following components in percentage by mass: 60.17% of Cu, 0.88% of Sn, 0.0022% of Mn, 0.001% of Fe, 0.25% of Si, 0.001% of Al, 0.002% of Pb, less than 0.2% of other components and the balance of Zn;
the manual alternating current tungsten electrode argon arc welding process comprises the following steps: firstly, forming a priming layer by adopting alternating current argon arc welding, wherein the adopted welding current is 185A, the welding voltage is 25V, the welding speed is 14cm/min, and the flow of helium is 15L/min; then, alternating current argon arc welding is adopted to form a filling layer, the adopted welding current is 195A, the welding voltage is 28V, the welding speed is 13cm/min, and the flow of helium is 15L/min; forming a covering layer by adopting alternating current argon arc welding, wherein the adopted welding current is 200A, the welding voltage is 30V, the welding speed is 13cm/min, and the flow of helium is 15L/min;
in the manual alternating current argon tungsten-arc welding process, a contact type measuring instrument is adopted for measuring, the interlayer temperature of a piece to be welded is controlled to be not less than 200 ℃, and when the interlayer temperature is lower than 200 ℃, the welding seam and the two sides of the welding seam are continuously heated to 200 ℃ within 100mm at a heating speed of not more than 50 ℃/h;
the manual alternating current argon tungsten-arc welding adopts a short-arc and point-fed continuous welding mode;
and step five, removing welding stress of the welding part obtained in the step four by adopting a continuous hammering mode, then gradually heating to 250 ℃, preserving heat for 1.5 hours for heat treatment, taking out of the furnace, carrying out air medium pressure sizing, and cooling to room temperature to obtain the HSn62-1 tin brass with the dimension (thickness multiplied by width multiplied by length) of 5mm multiplied by 2000 mm.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention in any way. Any simple modification, change and equivalent changes of the above embodiments according to the technical essence of the invention are still within the protection scope of the technical solution of the invention.
Claims (8)
1. A method for welding large-specification HSn62-1 tin brass is characterized by comprising the following steps:
firstly, machining a groove on an HSn62-1 tin brass parent metal, and then carrying out surface treatment;
step two, heating and preserving heat of the HSn62-1 tin brass parent metal subjected to surface treatment in the step one; the heated temperature is 150-200 ℃, the heat preservation time is 0.5-1 h when the thickness of the HSn62-1 tin brass parent metal subjected to surface treatment is within 25mm, and the heat preservation time is increased by 0.5h when the thickness of the HSn62-1 tin brass parent metal subjected to surface treatment is more than 25 mm;
step three, assembling the two HSn62-1 tin brass parent metals subjected to heat preservation in the step two to form a Y-shaped groove, wherein the assembly gap of the Y-shaped groove is 3-4 mm, obtaining a piece to be welded, fixing a gas back protection device on the piece to be welded, and introducing argon;
step four, carrying out manual alternating current argon tungsten-arc welding on the to-be-welded part which is introduced with argon in the step three by adopting an alternating current argon tungsten-arc welding machine to obtain a welded part; the manual alternating current argon tungsten-arc welding adopts helium with the mass purity of 99.999% as protective gas, selects HS221 welding wires as welding materials, and the HS221 welding wires comprise the following components in percentage by mass: 58 to 62 percent of Cu, not more than 1.0 percent of Sn, not more than 0.3 percent of Mn, not more than 0.2 percent of Fe, 0.1 to 0.5 percent of Si, not more than 0.01 percent of Al, not more than 0.03 percent of Pb, not more than 0.2 percent of other components, and the balance of Zn;
step five, removing welding stress of the welding part obtained in the step four, carrying out heat treatment, taking the welding part out of the furnace, carrying out air medium pressure sizing, and cooling to room temperature to obtain HSn62-1 tin brass; the length and the width of the HSn62-1 tin brass are not less than 2000 mm.
2. The method of claim 1, wherein the surface treatment in step one is: and wiping and cleaning by adopting ethanol solution to remove oil stains on the surface, and cleaning by adopting a stainless steel wire brush to remove the groove and an oxidation film and impurities within 50mm of the periphery of the groove.
3. The method for welding large-specification HSn62-1 tin brass as claimed in claim 1, wherein the argon gas has a purity of 99.999% by mass and is introduced at a flow rate of 20L/min to 30L/min in the third step.
4. The method for welding large-specification HSn62-1 tin brass as claimed in claim 1, wherein the manual alternating current argon tungsten-arc welding in the fourth step comprises the following steps: firstly, forming a priming layer by adopting alternating current argon arc welding, wherein the adopted welding current is 180-190A, the welding voltage is 24-26V, the welding speed is 12-15 cm/min, and the flow of helium is 15-20L/min; then, alternating current argon arc welding is adopted to form a filling layer, the adopted welding current is 190A-200A, the welding voltage is 26V-30V, the welding speed is 12 cm/min-15 cm/min, and the flow of helium is 15L/min-20L/min; and forming a covering layer by adopting alternating current argon arc welding, wherein the adopted welding current is 190A-200A, the welding voltage is 26V-30V, the welding speed is 12 cm/min-15 cm/min, and the flow of helium is 15L/min-20L/min.
5. The method for welding large-specification HSn62-1 tin brass as claimed in claim 1, wherein in the step four, during the manual alternating current argon tungsten-arc welding, the interlayer temperature of the piece to be welded is controlled to be not less than 200 ℃, and when the interlayer temperature is lower than 200 ℃, the welding seam and the welding seam are continuously heated to 200 ℃ within 100mm of the two sides of the welding seam at a heating speed of not more than 50 ℃/h.
6. The method of claim 5, wherein the interlayer temperature is measured using a contact gauge.
7. The method for welding large-specification HSn62-1 tin brass as claimed in claim 1, wherein the manual alternating current argon tungsten-arc welding in the fourth step adopts a short arc spot wire feeding continuous welding mode.
8. The method for welding the large-specification HSn62-1 tin brass as claimed in claim 1, wherein in step five, the welding stress is removed by continuous hammering, and then the temperature is gradually increased to 200-300 ℃ and kept for 1-2 h for heat treatment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111008752.9A CN113664341A (en) | 2021-08-31 | 2021-08-31 | Welding method of large-size HSn62-1 tin brass |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111008752.9A CN113664341A (en) | 2021-08-31 | 2021-08-31 | Welding method of large-size HSn62-1 tin brass |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113664341A true CN113664341A (en) | 2021-11-19 |
Family
ID=78547640
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111008752.9A Pending CN113664341A (en) | 2021-08-31 | 2021-08-31 | Welding method of large-size HSn62-1 tin brass |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113664341A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114160931A (en) * | 2021-12-30 | 2022-03-11 | 武昌船舶重工集团有限公司 | Welding method of copper tube and brass flange |
| CN114309896A (en) * | 2022-01-27 | 2022-04-12 | 西安天力金属复合材料股份有限公司 | Welding method of thin silver plate |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102699496A (en) * | 2012-05-23 | 2012-10-03 | 中国化学工程第三建设有限公司 | Welding process method of brass H62 |
| CN104722901A (en) * | 2013-12-24 | 2015-06-24 | 财团法人金属工业研究发展中心 | Welding method of lead-free brass |
| CN108581140A (en) * | 2018-07-27 | 2018-09-28 | 沈亚仁 | Gunmetal welding procedure |
| CN109352133A (en) * | 2018-11-09 | 2019-02-19 | 武汉船用机械有限责任公司 | The method of manual tungsten electrode heliarc welding welded H Fe59-1-1 iron brass |
| CN111730178A (en) * | 2020-07-03 | 2020-10-02 | 贵溪骏达特种铜材有限公司 | Welding process of aluminum bronze |
| JP2021013955A (en) * | 2019-07-16 | 2021-02-12 | 大陽日酸株式会社 | TIG welding method |
| CN113134664A (en) * | 2021-04-22 | 2021-07-20 | 徐州徐工矿业机械有限公司 | Process method for welding brass H62 and low-alloy cast steel G20Mn5 dissimilar material |
-
2021
- 2021-08-31 CN CN202111008752.9A patent/CN113664341A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102699496A (en) * | 2012-05-23 | 2012-10-03 | 中国化学工程第三建设有限公司 | Welding process method of brass H62 |
| CN104722901A (en) * | 2013-12-24 | 2015-06-24 | 财团法人金属工业研究发展中心 | Welding method of lead-free brass |
| CN108581140A (en) * | 2018-07-27 | 2018-09-28 | 沈亚仁 | Gunmetal welding procedure |
| CN109352133A (en) * | 2018-11-09 | 2019-02-19 | 武汉船用机械有限责任公司 | The method of manual tungsten electrode heliarc welding welded H Fe59-1-1 iron brass |
| JP2021013955A (en) * | 2019-07-16 | 2021-02-12 | 大陽日酸株式会社 | TIG welding method |
| CN111730178A (en) * | 2020-07-03 | 2020-10-02 | 贵溪骏达特种铜材有限公司 | Welding process of aluminum bronze |
| CN113134664A (en) * | 2021-04-22 | 2021-07-20 | 徐州徐工矿业机械有限公司 | Process method for welding brass H62 and low-alloy cast steel G20Mn5 dissimilar material |
Non-Patent Citations (2)
| Title |
|---|
| 于长山: "黄铜焊接接头的抗裂性研究", 《吉林工学院学报》 * |
| 郭新照, 山东科学技术出版社 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114160931A (en) * | 2021-12-30 | 2022-03-11 | 武昌船舶重工集团有限公司 | Welding method of copper tube and brass flange |
| CN114309896A (en) * | 2022-01-27 | 2022-04-12 | 西安天力金属复合材料股份有限公司 | Welding method of thin silver plate |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102941397B (en) | Argon tungsten arc welding method for nickel-based alloy | |
| CN113664341A (en) | Welding method of large-size HSn62-1 tin brass | |
| CN101623790B (en) | Welding method of cupronickel weldment | |
| US20090212025A1 (en) | Non-eutectic structure weld joint of copper-aluminum thin wall pipe and its manufacturing method | |
| CN103862147B (en) | The silk filling pulsed tungsten argon arc weld(ing) technique of molybdenum-copper and nickel base superalloy | |
| CN102079003A (en) | Automatic TIG gasket-free single-side welding and double-side molding process for aluminum alloy | |
| CN108788385B (en) | Welding method of stainless steel composite plate with Q345R low alloy steel as base layer and 904L stainless steel as multiple layers | |
| CN101264541A (en) | Additional electric arc heating copper backing board pre-heating aluminum alloy and magnesium alloy welding method | |
| CN107598340B (en) | Method for welding T-shaped joint of large thick plate | |
| CN106112204A (en) | A kind of marine low-speed machine air valve sealing surface build-up welding Nickel-based Alloy Welding technique | |
| CN109317794B (en) | Powder-filled plasma welding method for titanium alloy and stainless steel | |
| CN106312270A (en) | Coaxial hollow tungsten electrode TIG device and welding gun thereof, using method and application | |
| CN110091032B (en) | Method for welding dissimilar metals of steel and copper | |
| CN102615402A (en) | Tungsten electrode argon arc welding method for filler wires of titanium alloy and aluminum alloy | |
| CN103878470B (en) | A kind of titanium alloy and the argon tungsten arc process of nickel alloy foreign material | |
| CN106001859A (en) | Field horizontal welding method for duplex stainless steel | |
| CN104028959A (en) | Welding method for stainless steel composite material | |
| CN110640271A (en) | Efficient welding process for transverse fillet welding position of T-shaped full penetration joint of low-alloy high-strength steel | |
| CN107900494A (en) | A kind of S32750 super-duplex stainless steels flat cold-rolled sheet self-melting and welding method | |
| CN111347131A (en) | CLF-1 and 316L dissimilar steel TIG welding method | |
| CN112658484A (en) | Welding method of titanium steel bimetal composite plate | |
| CN114178698B (en) | 9Ni steel narrow-gap laser filler wire welding method | |
| CN108237280B (en) | Welding method of copper-tungsten electrode | |
| CN110091066B (en) | Laser-arc hybrid welding method for titanium alloy part | |
| CN114160931A (en) | Welding method of copper tube and brass flange |
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 |