CN117600620A - Butt welding method for dissimilar steel of 06Cr17Ni12Mo2N stainless steel plate and 34CrNi3Mo alloy steel plate - Google Patents
Butt welding method for dissimilar steel of 06Cr17Ni12Mo2N stainless steel plate and 34CrNi3Mo alloy steel plate Download PDFInfo
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- CN117600620A CN117600620A CN202311635944.1A CN202311635944A CN117600620A CN 117600620 A CN117600620 A CN 117600620A CN 202311635944 A CN202311635944 A CN 202311635944A CN 117600620 A CN117600620 A CN 117600620A
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- 238000003466 welding Methods 0.000 title claims abstract description 193
- 229910000851 Alloy steel Inorganic materials 0.000 title claims abstract description 76
- 239000010935 stainless steel Substances 0.000 title claims abstract description 66
- 229910001220 stainless steel Inorganic materials 0.000 title claims abstract description 66
- 238000000034 method Methods 0.000 title claims abstract description 35
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 28
- 239000010959 steel Substances 0.000 title claims abstract description 28
- 238000000137 annealing Methods 0.000 claims abstract description 14
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 18
- 238000010438 heat treatment Methods 0.000 claims description 11
- 238000001816 cooling Methods 0.000 claims description 10
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 9
- 239000001569 carbon dioxide Substances 0.000 claims description 9
- 238000012545 processing Methods 0.000 claims description 3
- 239000007789 gas Substances 0.000 description 7
- 239000000463 material Substances 0.000 description 7
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 6
- 210000001503 joint Anatomy 0.000 description 5
- 238000007689 inspection Methods 0.000 description 4
- 238000012797 qualification Methods 0.000 description 3
- 229910000746 Structural steel Inorganic materials 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005242 forging Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 239000010953 base metal Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/235—Preliminary treatment
-
- 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
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/26—Methods of annealing
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/50—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for welded joints
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2103/00—Materials to be soldered, welded or cut
- B23K2103/18—Dissimilar materials
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Plasma & Fusion (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Arc Welding In General (AREA)
Abstract
The invention discloses a butt welding method for dissimilar steel of a 06Cr17Ni12Mo2N stainless steel plate and a 34CrNi3Mo alloy steel plate, belongs to the technical field of dissimilar steel welding, and solves the problem that the welding quality is relatively low when dissimilar steel is directly subjected to shielded welding at present. The method comprises the steps of preheating a 34CrNi3Mo alloy steel plate before welding, and annealing a weldment formed by a 06Cr17Ni12Mo2N stainless steel plate and the 34CrNi3Mo alloy steel plate after welding. The dissimilar steel butt welding method can effectively improve welding quality and is suitable for the performance requirements of different products.
Description
Technical Field
The invention relates to the technical field of dissimilar steel welding, in particular to a butt welding method for a 06Cr17Ni12Mo2N stainless steel plate and a 34CrNi3Mo alloy steel plate.
Background
The 06Cr17Ni12Mo2N stainless steel plate is one of stainless steel materials, and the 34CrNi3Mo alloy steel plate is one of alloy steel materials, and the two are widely applied in the ship production process. In the ship manufacturing process, two dissimilar steel materials, namely a 06Cr17Ni12Mo2N stainless steel plate and a 34CrNi3Mo alloy steel plate, are usually welded together to realize sealing installation. For welding of the two dissimilar steels, the current method is to butt-joint a 06Cr17Ni12Mo2N stainless steel plate and a 34CrNi3Mo alloy steel plate together, and then use a welding rod to weld under the protection of inert gas, so that the welding quality can be effectively improved, and the qualification rate of products can be ensured. However, because the two steels are dissimilar steels with different components, the existing welding method directly performs the shielded welding without performing pretreatment on the two steels, the welding quality of the two steels is still to be improved, the welding quality is difficult to adapt to the characteristics and performance requirements of special products, and the application range is narrow. Therefore, development and design of a butt welding method for dissimilar steels of a 06Cr17Ni12Mo2N stainless steel plate and a 34CrNi3Mo alloy steel plate are needed.
Disclosure of Invention
Aiming at the defects in the prior art, the technical problem to be solved by the invention is to provide the butt welding method for dissimilar steel of the 06Cr17Ni12Mo2N stainless steel plate and the 34CrNi3Mo alloy steel plate, which can effectively improve the welding quality and is suitable for the performance requirements of different products.
The technical scheme of the invention is as follows: a butt welding method for dissimilar steel of a 06Cr17Ni12Mo2N stainless steel plate and a 34CrNi3Mo alloy steel plate comprises the steps of preheating the 34CrNi3Mo alloy steel plate before welding, and annealing a weldment formed by the 06Cr17Ni12Mo2N stainless steel plate and the 34CrNi3Mo alloy steel plate after welding.
As a further improvement, the method comprises the steps of:
s1, processing welding end surfaces of a 06Cr17Ni12Mo2N stainless steel plate and a 34CrNi3Mo alloy steel plate into V-shaped grooves;
s2, preheating the 34CrNi3Mo alloy steel plate;
s3, welding the V-shaped groove according to the sequence of welding the welding line of the side base layer of the 06Cr17Ni12Mo2N stainless steel and then welding the welding line of the side base layer of the 34CrNi3Mo alloy steel until the welding line fills the V-shaped groove, thereby obtaining
A weldment formed by a 06Cr17Ni12Mo2N stainless steel plate and a 34CrNi3Mo alloy steel plate;
and S4, annealing the weldment in the step S3 to finish welding.
In the step S1, the angle of the V-shaped groove is 55 degrees+/-5 degrees, and the root gap is 0-2 mm.
Further, in the step S2, the 34CrNi3Mo alloy steel plate is preheated to 90-110 ℃.
Further, the step S3 includes the following specific steps:
s3.1, welding from the middle position of the bottom layer of the welding end surface of the 06Cr17Ni12Mo2N stainless steel to the middle position of the bottom layer of the welding end surface of the 34CrNi3Mo alloy steel to form a first welding line;
s3.2, welding the two sides of the first welding line for a plurality of times from the bottom position of the welding end face of the 06Cr17Ni12Mo2N stainless steel to the bottom position of the welding end face of the 34CrNi3Mo alloy steel until the bottom position of the welding end face of the 06Cr17Ni12Mo2N stainless steel and the bottom position of the welding end face of the 34CrNi3Mo alloy steel are filled up to form a first welding line;
s3.3, dividing the welding position above the first layer of welding seam from the bottom layer position of the 06Cr17Ni12Mo2N stainless steel welding end face upwards into multiple layers, and repeating the welding of the steps S3.1 and 3.2 until the welding seam is filled with the V-shaped groove.
Further, in the steps 3.2 and S3.3, during welding, the temperature between two adjacent welding seams is controlled to be 110-130 ℃; in the step S3.3, during welding, the temperature between two adjacent layers of welding seams is controlled at 110-130 ℃.
Further, in the step S3, the welding wire is TFW-309MoL, the diameter is 1.2mm, the welding current is 125A-175A, and the voltage is 23V-24V.
Further, in the step S3, carbon dioxide gas is introduced into the welding portion to protect the molten pool during welding, and the flow rate of the carbon dioxide gas is 18L to 20L/min.
Further, the step S4 includes the following specific steps:
s4.1, rapidly heating the weldment to 350 ℃;
s4.2, slowly heating the weldment to 550-600 ℃ at a heating rate of 75-85 ℃ per hour;
s4.3, keeping the temperature of the weldment for 2 hours;
s4.4, slowly cooling the weldment to 350 ℃ at a cooling rate of 55-85 ℃ per hour;
s4.5, naturally cooling the weldment to normal temperature.
Further, in the step S4, before annealing the welded part, the surface of the welded part is polished and smoothed by a grinding wheel, and burrs are removed.
Advantageous effects
Compared with the prior art, the invention has the following advantages:
the welding method is applied to butt joint of a 06Cr17Ni12Mo2N stainless steel plate and a 34CrNi3Mo alloy steel plate, and the high-strength alloy structural steel for the large forging contains about 3% of nickel (Ni), has stable heat treatment performance, small temperature change, high strength and good comprehensive mechanical property and technological property, so that the welding method can well connect the 06Cr17Ni12Mo2N stainless steel plate and the 34CrNi3Mo alloy steel plate together by preheating the 34CrNi3Mo alloy steel plate before welding and annealing the welded part after welding, effectively prevents cold cracks, and is suitable for the performance requirements of different products.
Drawings
FIG. 1 is a schematic diagram of a welding application of example 1 of the present invention;
FIG. 2 is a schematic diagram of the welding application of example 2 of the present invention.
Wherein: 1-06Cr17Ni12Mo2N stainless steel plate, 2-34CrNi3Mo alloy steel plate and 3-V groove.
Detailed Description
The invention will be further described with reference to specific embodiments in the drawings.
The invention relates to a butt welding method for dissimilar steel of a 06Cr17Ni12Mo2N stainless steel plate and a 34CrNi3Mo alloy steel plate, which comprises the steps of preheating the 34CrNi3Mo alloy steel plate before welding, and annealing a weldment formed by the 06Cr17Ni12Mo2N stainless steel plate and the 34CrNi3Mo alloy steel plate after welding.
The welding method is applied to butt joint of a 06Cr17Ni12Mo2N stainless steel plate and a 34CrNi3Mo alloy steel plate, and the high-strength alloy structural steel for the large forging contains about 3% of nickel (Ni), has stable heat treatment performance, small temperature change, high strength and good comprehensive mechanical property and technological property, so that the welding method can well connect the 06Cr17Ni12Mo2N stainless steel plate and the 34CrNi3Mo alloy steel plate together by preheating the 34CrNi3Mo alloy steel plate before welding and annealing the welded part after welding, effectively prevents cold cracks, and is suitable for the performance requirements of different products.
The method comprises the following steps:
s1, processing welding end surfaces of a 06Cr17Ni12Mo2N stainless steel plate and a 34CrNi3Mo alloy steel plate into V-shaped grooves; specifically, the welding end surfaces of the 06Cr17Ni12Mo2N stainless steel plate and the 34CrNi3Mo alloy steel plate are respectively processed into bevel openings, and after the 06Cr17Ni12Mo2N stainless steel plate and the 34CrNi3Mo alloy steel plate are butted, a V-shaped groove is formed between the two bevel openings, and the bottom of the V-shaped groove is the welding end surfaces of the 06Cr17Ni12Mo2N stainless steel plate and the 34CrNi3Mo alloy steel plate and is regarded as the root of the V-shaped groove;
s2, preheating the 34CrNi3Mo alloy steel plate; in this step, the 06Cr17Ni12Mo2N stainless steel plate does not need to be preheated;
s3, welding the V-shaped groove according to the sequence of welding the 06Cr17Ni12Mo2N stainless steel side base layer weld seam and then welding the 34CrNi3Mo alloy steel side base layer weld seam (namely, welding from one side of the 06Cr17Ni12Mo2N stainless steel welding end surface to one side of the 34CrNi3Mo alloy steel welding end surface) until the weld seam is filled with the V-shaped groove, so as to obtain a weldment formed by the 06Cr17Ni12Mo2N stainless steel plate and the 34CrNi3Mo alloy steel plate;
and S4, annealing the weldment in the step S3 to finish welding.
Preferably, in step S1, the angle of the V-groove is 55 ° ± 5 °, the root gap is 0mm to 2mm, and the angle value and the root gap value of the V-groove can be selected according to the thickness of the base material.
Preferably, in step S2, the 34CrNi3Mo alloy steel sheet is preheated to 90 to 110 ℃, and the preheating temperature can be selected according to the thickness of the base material and the welding field.
Preferably, step S3 comprises the following specific steps:
s3.1, welding from the middle position of the bottom layer of the welding end surface of the 06Cr17Ni12Mo2N stainless steel to the middle position of the bottom layer of the welding end surface of the 34CrNi3Mo alloy steel to form a first welding line; firstly welding the middle position of the bottom layer of the welding end surface of the 06Cr17Ni12Mo2N stainless steel and the middle position of the bottom layer of the welding end surface of the 34CrNi3Mo alloy steel, and preliminarily welding and fixing the two by utilizing a first welding line;
s3.2, welding the two sides of the first welding line for a plurality of times from the bottom position of the welding end face of the 06Cr17Ni12Mo2N stainless steel to the bottom position of the welding end face of the 34CrNi3Mo alloy steel until the bottom position of the welding end face of the 06Cr17Ni12Mo2N stainless steel and the bottom position of the welding end face of the 34CrNi3Mo alloy steel are filled up to form a first welding line;
s3.3, dividing the welding position above the first layer of welding seam from the bottom layer position of the 06Cr17Ni12Mo2N stainless steel welding end face upwards into multiple layers, and repeating the welding of the steps S3.1 and 3.2 until the welding seam is filled with the V-shaped groove.
In the method, for welding the V-shaped groove, a multi-layer and multi-channel welding mode is adopted, so that the welding quality can be further improved while the regular welding seams are convenient to weld, and meanwhile, welding consumables are saved.
Preferably, in the steps 3.2 and S3.3, during welding, the temperature between two adjacent welding seams is controlled to be 110-130 ℃; in the step S3.3, during welding, the temperature between two adjacent layers of welding seams is controlled to be 110-130 ℃, in the specific operation process, the temperature between two adjacent layers of welding seams or between two adjacent layers of welding seams can be detected through a temperature detector, then the welding frequency is regulated according to the detected temperature, and the quality of the welding seams or the welding seams between the two adjacent layers of welding seams can be effectively improved.
Preferably, in the step S3, during welding, the adopted welding wire is TFW-309MoL, the diameter is 1.2mm, the polarity of a welding power source is DCEP, the welding current is 125A-175A, the voltage is 23V-24V, and the welding is performed by selecting corresponding parameters according to the thickness of a base metal and welding occasions.
Preferably, in step S3, carbon dioxide gas is introduced into the welding portion during welding to protect the molten pool, and the flow rate of the carbon dioxide gas is 18L to 20L/min. The carbon dioxide gas is adopted for molten pool protection, so that the welding quality can be effectively improved, and the qualification rate of products is ensured.
Preferably, step S4 comprises the following specific steps:
s4.1, rapidly heating the weldment to 350 ℃;
s4.2, slowly heating the weldment to 550-600 ℃ at a heating rate of 75-85 ℃ per hour;
s4.3, keeping the temperature of the weldment for 2 hours;
s4.4, slowly cooling the weldment to 350 ℃ at a cooling rate of 55-85 ℃ per hour;
s4.5, naturally cooling the weldment to normal temperature.
In the welding method, the annealing of the welding piece is realized by adopting the modes of rapid heating-slow heating-heat preservation-slow cooling-natural cooling, so that the generation of cold cracks of the welding seam can be prevented, the welding quality is further improved, and the qualification rate of the welding piece is ensured.
Preferably, in step S4, before annealing the welded part, the surface of the welded part is polished and smoothed by a grinding wheel, and burrs are removed, so that the subsequent annealing treatment of the welded part is facilitated.
Example 1
Referring to FIG. 1, an embodiment of the present invention is shown, which is applied to
The 06Cr17Ni12Mo2N stainless steel plates 1, 34CrNi3Mo alloy steel plates 2 were welded when placed horizontally, and the 06Cr17Ni12Mo2N stainless steel plates 1, 34CrNi3Mo alloy steel plates 2 were welded with each other to form a V-groove 3 therebetween, which was regarded as butt welding.
In this embodiment, the base material is given the following marks and specifications: for example, a 06Cr17Ni12Mo2N stainless steel plate (t=7mm) +34CrNi3Mo alloy steel plate (t=7mm) has welding parameters of:
the preheating temperature of the 34CrNi3Mo alloy steel plate is as follows: 92-103 DEG C
The temperature of the adjacent two layers of welding seams is as follows: 111-126 DEG C
The welding current is as follows: 163A-173A
The welding voltage is: 22.7V-22.5V
Protective gas: carbon dioxide is more than or equal to 99.5%, flow: 18L-20L/min.
Table 1: weld joint radiographic inspection report
Table 2: mechanical property test report
As can be seen from the above tables 1 and 2, the welding method of the invention is adopted to weld the 06Cr17Ni12Mo2N stainless steel plate and the 34CrNi3Mo alloy steel plate in a butt joint mode, and the weld joint radiographic inspection and the mechanical properties of the steel plate can meet the use standards.
Example 2
Referring to fig. 2, another embodiment of the present invention is shown, and the embodiment is applied to welding in a situation where 06Cr17Ni12Mo2N stainless steel plates 1 and 34CrNi3Mo alloy steel plates 2 are vertically placed, and V-shaped grooves 3 are formed between the 06Cr17Ni12Mo2N stainless steel plates 1 and 34CrNi3Mo alloy steel plates 2, which is regarded as vertical butt welding.
In this embodiment, the base material is used as a brand and a specification: 06Cr17Ni12Mo2N stainless steel plate (t=7mm)
For the example of +34CrNi3Mo alloy steel sheet (t=7mm), the welding parameters are:
the preheating temperature of the 34CrNi3Mo alloy steel plate is as follows: 95-106 DEG C
The temperature of the adjacent two layers of welding seams is as follows: 116-129 DEG C
The welding current is as follows: 125A-142A
The welding voltage is: 23.5V-23.0V
Protective gas: carbon dioxide is more than or equal to 99.5%, flow: 18L-20L/min.
Table 3: weld joint radiographic inspection report
Table 4: mechanical property test report
As can be seen from the above tables 3 and 4, the welding method of the present invention is used for butt welding 06Cr17Ni12Mo2N stainless steel plate and 34CrNi3Mo alloy steel plate, and the weld joint radiographic inspection and mechanical properties of the steel plate can meet the use standards.
The method can be applied to occasions of horizontal butt joint and vertical butt joint, can meet the requirements of more welding parts, and can increase the coverage range of welding operation.
While only the preferred embodiments of the present invention have been described above, it should be noted that modifications and improvements can be made by those skilled in the art without departing from the structure of the present invention, and these do not affect the effect of the implementation of the present invention and the utility of the patent.
Claims (10)
1. A butt welding method for dissimilar steel of a 06Cr17Ni12Mo2N stainless steel plate and a 34CrNi3Mo alloy steel plate is characterized in that the method is characterized in that the 34CrNi3Mo alloy steel plate is subjected to preheating treatment before welding, and a weldment formed by the 06Cr17Ni12Mo2N stainless steel plate and the 34CrNi3Mo alloy steel plate is subjected to annealing treatment after welding.
2. The butt welding method for 06Cr17Ni12Mo2N stainless steel plate and 34CrNi3Mo alloy steel plate dissimilar steel according to claim 1, which is characterized by comprising the following steps:
s1, processing welding end surfaces of a 06Cr17Ni12Mo2N stainless steel plate and a 34CrNi3Mo alloy steel plate into V-shaped grooves;
s2, preheating the 34CrNi3Mo alloy steel plate;
s3, welding the V-shaped groove according to the sequence of welding the welding line of the side base layer of the 06Cr17Ni12Mo2N stainless steel and then welding the welding line of the side base layer of the 34CrNi3Mo alloy steel until the welding line fills the V-shaped groove, so as to obtain a weldment formed by the 06Cr17Ni12Mo2N stainless steel plate and the 34CrNi3Mo alloy steel plate;
and S4, annealing the weldment in the step S3 to finish welding.
3. The butt welding method for dissimilar steels of 06Cr17Ni12Mo2N stainless steel plate and 34CrNi3Mo alloy steel plate according to claim 2, wherein in the step S1, the angle of the V-shaped groove is 55 degrees+/-5 degrees, and the root gap is 0 mm-2 mm.
4. The butt welding method for dissimilar steel between a 06Cr17Ni12Mo2N stainless steel plate and a 34CrNi3Mo alloy steel plate according to claim 2, wherein in the step S2, the 34CrNi3Mo alloy steel plate is preheated to 90-110 ℃.
5. The butt welding method for dissimilar steels of 06Cr17Ni12Mo2N stainless steel plate and 34CrNi3Mo alloy steel plate according to claim 2, wherein said step S3 comprises the following specific steps:
s3.1, welding from the middle position of the bottom layer of the welding end surface of the 06Cr17Ni12Mo2N stainless steel to the middle position of the bottom layer of the welding end surface of the 34CrNi3Mo alloy steel to form a first welding line;
s3.2, welding the two sides of the first welding line for a plurality of times from the bottom position of the welding end face of the 06Cr17Ni12Mo2N stainless steel to the bottom position of the welding end face of the 34CrNi3Mo alloy steel until the bottom position of the welding end face of the 06Cr17Ni12Mo2N stainless steel and the bottom position of the welding end face of the 34CrNi3Mo alloy steel are filled up to form a first welding line;
s3.3, dividing the welding position above the first layer of welding seam from the bottom layer position of the 06Cr17Ni12Mo2N stainless steel welding end face upwards into multiple layers, and repeating the welding of the steps S3.1 and 3.2 until the welding seam is filled with the V-shaped groove.
6. The method for butt welding of 06Cr17Ni12Mo2N stainless steel plate and 34CrNi3Mo alloy steel plate dissimilar steel according to claim 5, wherein in the steps 3.2 and S3.3, the temperature between two adjacent welding seams is controlled between 110 ℃ and 130 ℃ during welding; in the step S3.3, during welding, the temperature between two adjacent layers of welding seams is controlled at 110-130 ℃.
7. The butt welding method for dissimilar steels of 06Cr17Ni12Mo2N stainless steel plate and 34CrNi3Mo alloy steel plate according to claim 2, wherein in the step S3, welding wires are used for welding, wherein the welding wires are TFW-309MoL, the diameter is 1.2mm, the welding current is 125A-175A, and the voltage is 23V-24V.
8. The method for butt welding a 06Cr17Ni12Mo2N stainless steel plate and a 34CrNi3Mo alloy steel plate according to claim 7, wherein in the step S3, carbon dioxide gas is introduced into the welding portion for molten pool protection during welding, and the flow rate of the carbon dioxide gas is 18L to 20L/min.
9. The butt welding method for dissimilar steels of 06Cr17Ni12Mo2N stainless steel plate and 34CrNi3Mo alloy steel plate according to any one of claims 2 to 8, wherein said step S4 comprises the following specific steps:
s4.1, rapidly heating the weldment to 350 ℃;
s4.2, slowly heating the weldment to 550-600 ℃ at a heating rate of 75-85 ℃ per hour;
s4.3, keeping the temperature of the weldment for 2 hours;
s4.4, slowly cooling the weldment to 350 ℃ at a cooling rate of 55-85 ℃ per hour;
s4.5, naturally cooling the weldment to normal temperature.
10. The method for butt welding 06Cr17Ni12Mo2N stainless steel plate and 34CrNi3Mo alloy steel plate dissimilar steel according to claim 9, wherein in step S4, before annealing the welded part, the surface of the welded seam is polished and smoothed by a grinding wheel, and burrs are removed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311635944.1A CN117600620A (en) | 2023-11-30 | 2023-11-30 | Butt welding method for dissimilar steel of 06Cr17Ni12Mo2N stainless steel plate and 34CrNi3Mo alloy steel plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311635944.1A CN117600620A (en) | 2023-11-30 | 2023-11-30 | Butt welding method for dissimilar steel of 06Cr17Ni12Mo2N stainless steel plate and 34CrNi3Mo alloy steel plate |
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|---|---|
| CN117600620A true CN117600620A (en) | 2024-02-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311635944.1A Pending CN117600620A (en) | 2023-11-30 | 2023-11-30 | Butt welding method for dissimilar steel of 06Cr17Ni12Mo2N stainless steel plate and 34CrNi3Mo alloy steel plate |
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| CN (1) | CN117600620A (en) |
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