CN113618202A - 980 steel welding method - Google Patents
980 steel welding method Download PDFInfo
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- CN113618202A CN113618202A CN202110906291.0A CN202110906291A CN113618202A CN 113618202 A CN113618202 A CN 113618202A CN 202110906291 A CN202110906291 A CN 202110906291A CN 113618202 A CN113618202 A CN 113618202A
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- welding
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- steel
- preheating
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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
- B23K9/00—Arc welding or cutting
- B23K9/16—Arc welding or cutting making use of shielding gas
-
- 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
- B23K9/02—Seam welding; Backing means; Inserts
-
- 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
Abstract
The invention relates to a welding method of 980 steel, belonging to the technical field of welding; the method comprises the following steps: preheating a welding seam of a workpiece to be welded; adopting consumable electrode gas shielded welding to the workpiece, wherein the welding wire is JS80, and the specification of the welding wire is phi 1.2; post-heating the workpiece; and annealing the workpiece. Compared with the prior art, the method can reduce the temperature gradient of the welding joint and avoid the generation of cracks by preheating the welding seam of the welding workpiece; by adopting the mixed gas rich in argon and carbon dioxide as the protective gas, the electric arc is stable, the splashing is small, and the welding line is attractive in forming. The JS80 welding wire is well matched with 980 steel, and the welding wire is adopted for welding, so that the quality of a formed welding seam is good, and the welding requirement of the 980 steel can be met; annealing can be beneficial to releasing the stress of the workpiece, cracks are avoided after welding, reduction of impact toughness of a welded joint is avoided, and therefore the welding quality of 980 steel is improved.
Description
Technical Field
The invention relates to a steel welding method, in particular to a 980 steel welding method, and belongs to the technical field of welding.
Background
980 steel is a steel for pressure housing having a yield strength of not less than 785 MPa. The high-strength high-toughness engineering structure has high strength and high toughness, is resistant to seawater corrosion, has good shipbuilding process adaptability, and is suitable for high-strength and high-toughness engineering structures such as submarine pressure-resistant shells and aircraft carriers. At present, welding rod arc welding is generally adopted for 980 steel welding, the welding efficiency is low, and cracks after welding are easy to occur.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, solve the problems that 980 steel is low in welding efficiency and easy to crack after welding, and provide a welding method of 980 steel.
The purpose of the invention is realized by the following technical scheme.
A method of welding 980 steel, comprising:
preheating a welding seam of a workpiece to be welded;
preferably, the preheating width is within 100mm of each side of the workpiece groove.
Preferably, the preheating temperature range is 110 to 130 ℃ when the workpiece plate thickness is not more than 40mm, and 120 to 150 ℃ when the workpiece plate thickness exceeds 40 mm.
Adopting consumable electrode gas shielded welding to the workpiece, wherein the welding wire is JS80, and the specification of the welding wire is phi 1.2;
preferably, the shielding gas of the shielded welding is a mixed gas of 80% argon-rich gas and 20% carbon dioxide.
Preferably, the welding line energy during welding is controlled to be less than or equal to 24 KJ/min.
Preferably, the welding voltage during welding ranges from 22V to 28V, the welding current range of the first pass is from 170A to 200A, and the welding current range of the second pass and the subsequent pass is from 180A to 270A.
Post-heating the workpiece;
preferably, the post-heating temperature ranges from 200 ℃ to 250 ℃, and the heat is preserved for 2 hours.
Preferably, after the heat preservation, heat preservation cotton is used for slow cooling.
And annealing the workpiece.
Preferably, the annealing temperature is lower than the transformation temperature of the 980 steel.
Preferably, the annealing is to heat the workpiece to 510-550 ℃ and keep the temperature for 4-6 h; when the temperature of the workpiece exceeds 400 ℃, controlling the temperature rising speed not to exceed 200 ℃/h, wherein h represents a time unit: and (4) hours.
Advantageous effects
Compared with the prior art, the method can reduce the temperature gradient of the welding joint and avoid the generation of cracks by preheating the welding seam of the welding workpiece; by adopting the mixed gas rich in argon and carbon dioxide as the protective gas, the electric arc is stable, the splashing is small, and the welding line is attractive in forming. The JS80 welding wire is well matched with 980 steel, and the welding wire is adopted for welding, so that the quality of a formed welding seam is good, and the welding requirement of the 980 steel can be met; annealing can be beneficial to releasing the stress of the workpiece, cracks are avoided after welding, reduction of impact toughness of a welded joint is avoided, and therefore the welding quality of 980 steel is improved.
Drawings
FIG. 1 is a schematic process flow diagram of the process of the present invention.
Detailed Description
For the purpose of illustrating the objects, technical solutions and advantages of the embodiments of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
Example 1
A method of welding 980 steel, comprising:
1. and preheating the welding line of the workpiece to be welded, wherein the preheating width is within 100mm of each side of the groove. The preheating temperature is as follows: when the plate thickness is within 40mm, the preheating temperature is 110-130 ℃, and when the plate thickness is more than 40mm, the preheating temperature is 120-150 ℃.
2. Performing gas metal arc welding on a workpiece, wherein the protective gas is a mixed gas of 80% of rich argon and 20% of carbon dioxide, the welding wire is JS80, and the specification of the welding wire is phi 1.2; the temperature between layers is ensured during multilayer welding, and the temperature is the same as the preheating temperature.
3. And (3) welding specification:
the welding line energy is controlled to be less than or equal to 24 KJ/min.
4. And post-heating the workpiece. The post-heating temperature is 200-250 ℃, the temperature is kept for 2 hours, and the heat-preservation cotton is slowly cooled after the temperature is kept.
5. And annealing the workpiece. The annealing temperature is lower than the phase transition temperature of 980 steel, and the workpiece is gradually heated to 510-550 ℃ and is kept warm for 4-6 h. The temperature of the workpiece exceeds 400 ℃, and the temperature rising speed is controlled not to exceed 200 ℃/h.
The method of the invention can be used for rapidly obtaining the flatness error of the flat plate in a programmed manner, and has the effects of simple operation process, programmed operation steps and high working efficiency.
In order to illustrate the contents and embodiments of the present invention, specific examples are given herein. The details introduced in the examples are not intended to limit the scope of the claims but to assist in understanding the present invention. Those skilled in the art will understand that: various modifications, changes or substitutions to the preferred embodiment steps are possible without departing from the spirit and scope of the invention and its appended claims. Therefore, the present invention should not be limited to the disclosure of the preferred embodiments and the accompanying drawings.
Claims (10)
1. A980 steel welding method is characterized in that: the method comprises the following steps:
preheating a welding seam of a workpiece to be welded;
adopting consumable electrode gas shielded welding to the workpiece, wherein the welding wire is JS80, and the specification of the welding wire is phi 1.2;
post-heating the workpiece;
and annealing the workpiece.
2. The method of claim 1, wherein: the preheating width is within the range of 100mm on each side of the workpiece groove.
3. The method of claim 2, wherein: the preheating temperature range is 110 to 130 ℃ when the thickness of the workpiece plate is not more than 40mm, and 120 to 150 ℃ when the thickness of the workpiece plate exceeds 40 mm.
4. The method of claim 1, wherein: the shielding gas of the shielded welding is a mixed gas of 80% of rich argon and 20% of carbon dioxide.
5. The method of claim 4, wherein: the welding line energy is controlled to be less than or equal to 24KJ/min during welding.
6. The method of claim 5, wherein: the welding voltage range during welding is 22V-28V, the welding current range of the first pass is 170A-200A, and the welding current range of the second pass and the subsequent pass is 180A-270A.
7. The method of claim 1, wherein: the post-heating temperature range is 200-250 ℃, and the temperature is kept for 2 hours.
8. The method of claim 7, wherein: and after heat preservation, slowly cooling by using heat preservation cotton.
9. The method according to any one of claims 1 to 8, wherein: the annealing temperature is lower than the transformation temperature of the 980 steel.
10. The method of claim 9, wherein: in the annealing step, the workpiece is heated to 510-550 ℃ and is kept warm for 4-6 h; when the temperature of the workpiece exceeds 400 ℃, controlling the temperature rising speed not to exceed 200 ℃/h, wherein h represents a time unit: and (4) hours.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110906291.0A CN113618202A (en) | 2021-08-09 | 2021-08-09 | 980 steel welding method |
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|---|---|---|---|
| CN202110906291.0A CN113618202A (en) | 2021-08-09 | 2021-08-09 | 980 steel welding method |
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Citations (11)
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