CN109926721B - Laser arc fuse welding process capable of avoiding slag inclusion - Google Patents
Laser arc fuse welding process capable of avoiding slag inclusion Download PDFInfo
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Abstract
The invention provides a laser arc fuse welding process capable of avoiding slag inclusion, which comprises the following steps of: s1: fixing a workpiece and polishing a welding part of the workpiece; s2: spraying a cleaning agent on the welding part; s3: preheating before welding: preheating a workpiece before welding; s4: activating the welding surface: after stopping heating, quickly spraying the active agent; s5: after the welding part is dried, welding operation is carried out by adopting a welding rod; s6: and cooling and shaping. The invention aims to reduce slag inclusion of a die workpiece and reduce the difficulty and necessity of a subsequent slag inclusion removing process, and a laser arc fuse welding process for avoiding slag inclusion needs to be researched and developed from a welding source.
Description
Technical Field
The invention relates to the technical field of machining of automatic dies, in particular to a laser arc fuse welding process capable of avoiding slag inclusion.
Background
Laser welding is a novel welding technology developed in recent decades, has the advantages of less heat input, concentrated energy density, small deformation of a heat affected zone, capability of obtaining larger fusion depth and the like, can fully exert the advantages of high welding efficiency and the like particularly by being combined with a robot, and is increasingly applied to industrial production at present.
The traditional Chinese invention patent with the patent number of CN201810046047.X and the patent name of 'cast magnesium alloy product surface treatment equipment and process thereof' discloses equipment and process for treating slag inclusion on the surface of a magnesium alloy product, and the equipment has the advantages of complex structure, various operations, low slag inclusion removing efficiency and high cost. Therefore, in order to reduce slag inclusion of the die workpiece and reduce the difficulty and necessity of the subsequent slag inclusion removal process, a laser arc fuse welding process for avoiding slag inclusion needs to be researched and developed from a welding source.
Disclosure of Invention
The invention aims to reduce slag inclusion of a die workpiece and reduce the difficulty and necessity of a subsequent slag inclusion removing process, and a laser arc fuse welding process for avoiding slag inclusion needs to be researched and developed from a welding source.
The invention relates to a laser arc fuse welding process capable of avoiding slag inclusion, which comprises the following steps of: s1: fixing a workpiece and polishing a welding part of the workpiece; s2: spraying a cleaning agent on the welding part; s3: preheating before welding: preheating a workpiece before welding; s4: activating the welding surface: after stopping heating, quickly spraying the active agent; s5: after the welding part is dried, welding operation is carried out by adopting a welding rod; s6: and cooling and shaping.
As a further improvement of the invention, the welding rod in the step S6 comprises the following components and proportions: a. the coating comprises the following components: 100 parts of marble, 50 parts of fluorite, 10-15 parts of silicate, 15-20 parts of deoxidizer and 25-35 parts of alloying agent; b. the core wire comprises the following components: c is less than or equal to 0.020%, Si is less than or equal to 0.050%, Mn0.40-0.60%, S is less than or equal to 0.006%, P is less than or equal to 0.006%, Cr is less than or equal to 0.05%, Mo is less than or equal to 0.05%, Ni is less than or equal to 0.05%, Ti is less than or equal to 0.05%, Cu is less than or equal to 0.05%, and As is less than or equal to 0.001%.
As a further improvement of the invention, the welding rod is prepared by a coating machine of a double-deposition electrode through a coating machine of a coating composition, a core wire composition and a binder, the number of the core wires in the welding rod is two, and the coating wraps the two parallel core wires.
As a further improvement of the invention, the spacing between the two cores of the core wires is 0.8-1.2 mm.
As a further improvement of the invention, the spacing between the two cores of the core wires is 1.0 mm.
As a further improvement of the invention, the weight coefficient of the coating is 45-83.
As a further improvement of the invention, the preheating temperature in the step S3 is 500-700 ℃ and the heating is carried out for 60-100S.
As a further improvement of the invention, the cleaning agent comprises 100 parts of water, 10-20 parts of water-soluble silicate, 1-5 parts of zwitterionic surfactant, 5-8 parts of hydroxy lauric acid, 10-15 parts of butanediol propionate and 10-15 parts of dichlorotetrafluoromethane.
As a further improvement of the invention, the active agent in the step S3 comprises the following components and proportions: 100 parts of silicon dioxide, 30-45 parts of chromium oxide, 50-65 parts of ferrotitanium oxide and 25-40 parts of calcium fluoride.
As a further improvement of the present invention, the welding parameters of the welding operation of step S5 are: the laser power is 3.0-3.5KW, the defocusing amount is 5-8mm, the welding speed is 1.2-1.5m/min, and the wire feeding speed is 1.8-2.3 m/min.
Compared with the prior art, the invention has the following beneficial effects:
1. the cleaning agent system comprises a cleaning agent, a cleaning agent and a water-soluble polymer, wherein the cleaning agent is used for cleaning the surface of the workpiece, and the water-soluble polymer is used for removing the scum on the surface of the welding part.
2. The self-made welding rod adopted by the invention has less slag, the melting speed of the double welding cores tends to be consistent in the combustion process, the splashing generated by the coating of the welding rod is less, the coating sleeve is long and parallel, the deflection is larger, the arc voltage fluctuation is smaller, the welding stability is high, and the generated slag inclusion is less.
3. According to the invention, after the workpiece is preheated, the multi-component active agent is sprayed on the welding part, and the silicon dioxide, the chromium oxide, the titanium oxide iron and the calcium fluoride system can increase the penetration depth of the surface of the workpiece and improve the adhesion property of the welding line, and the titanium oxide iron can reduce the forming coefficient of the surface of the welding line, so that the forming effect is good, and the probability of molten slag inclusion in the welding process can be reduced.
4. The invention optimizes the distance between the double cores and the weight coefficient of the coating, the welding rod splashes less, the melting of the end parts of the double cores is parallel and level in the combustion process of the welding rod, the melting speed of the double cores is more consistent, the formed coating sleeve is long and parallel, the stiffness is higher, the electric arc voltage fluctuation is smaller, the metallurgical reaction is full, and the electric arc stability is good.
Detailed Description
The technical solution of the present invention will be clearly and completely described below with reference to specific embodiments. It is to be understood that the described embodiments are merely a few embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without any inventive step, are within the scope of the present invention.
The embodiments of the present invention are as follows.
Example 1
The invention relates to a laser arc fuse welding process capable of avoiding slag inclusion, which comprises the following steps of: s1: fixing a workpiece and polishing a welding part of the workpiece; s2: spraying a cleaning agent on the welding part; s3: preheating before welding: preheating a workpiece before welding; s4: activating the welding surface: after stopping heating, quickly spraying the active agent; s5: after the welding part is dried, welding operation is carried out by adopting a welding rod; s6: and cooling and shaping.
As a further improvement of the invention, the welding rod in the step S6 comprises the following components and proportions: a. the coating comprises the following components: 100 parts of marble, 50 parts of fluorite, 10 parts of silicate, 15 parts of deoxidizer and 25 parts of alloying agent; b. the core wire comprises the following components: c is less than or equal to 0.020%, Si is less than or equal to 0.050%, Mn0.40-0.60%, S is less than or equal to 0.006%, P is less than or equal to 0.006%, Cr is less than or equal to 0.05%, Mo is less than or equal to 0.05%, Ni is less than or equal to 0.05%, Ti is less than or equal to 0.05%, Cu is less than or equal to 0.05%, and As is less than or equal to 0.001%.
As a further improvement of the invention, the welding rod is prepared by a coating machine of a double-deposition electrode through a coating machine of a coating composition, a core wire composition and a binder, the number of the core wires in the welding rod is two, and the coating wraps the two parallel core wires.
As a further improvement of the invention, the spacing between the two cores of the core wires is 0.8 mm.
As a further improvement of the invention, the weight coefficient of the coating is 45. The welding rod is a welding material for the shielded metal arc welding method and consists of a core wire and a coating, and the weight ratio of the coating to the core wire is called the coating weight coefficient of the welding rod.
As a further modification of the present invention, the preheating temperature in step S3 is 500 degrees celsius, and heating is performed for 60 seconds.
As a further improvement of the invention, the cleaning agent comprises 100 parts of water, 10 parts of water-soluble silicate, 1 part of zwitterionic surfactant, 5 parts of hydroxy lauric acid, 10 parts of butanediol propionate and 10 parts of dichlorotetrafluoromethane.
As a further improvement of the invention, the active agent in the step S3 comprises the following components and proportions: 100 parts of silicon dioxide, 30 parts of chromium oxide, 50 parts of ferrotitanium oxide and 25 parts of calcium fluoride.
As a further improvement of the present invention, the welding parameters of the welding operation of step S5 are: the laser power is 3.0KW, the defocusing amount is 5mm, the welding speed is 1.2m/min, and the wire feeding speed is 1.8 m/min.
Example 2
The invention relates to a laser arc fuse welding process capable of avoiding slag inclusion, which comprises the following steps of: s1: fixing a workpiece and polishing a welding part of the workpiece; s2: spraying a cleaning agent on the welding part; s3: preheating before welding: preheating a workpiece before welding; s4: activating the welding surface: after stopping heating, quickly spraying the active agent; s5: after the welding part is dried, welding operation is carried out by adopting a welding rod; s6: and cooling and shaping.
As a further improvement of the invention, the welding rod in the step S6 comprises the following components and proportions: a. the coating comprises the following components: 100 parts of marble, 50 parts of fluorite, 15 parts of silicate, 20 parts of deoxidizer and 35 parts of alloying agent; b. the core wire comprises the following components: c is less than or equal to 0.020%, Si is less than or equal to 0.050%, Mn0.40-0.60%, S is less than or equal to 0.006%, P is less than or equal to 0.006%, Cr is less than or equal to 0.05%, Mo is less than or equal to 0.05%, Ni is less than or equal to 0.05%, Ti is less than or equal to 0.05%, Cu is less than or equal to 0.05%, and As is less than or equal to 0.001%.
As a further improvement of the invention, the welding rod is prepared by a coating machine of a double-deposition electrode through a coating machine of a coating composition, a core wire composition and a binder, the number of the core wires in the welding rod is two, and the coating wraps the two parallel core wires.
As a further improvement of the invention, the spacing between the two cores of the core wires is 1.2 mm.
As a further improvement of the invention, the weight coefficient of the coating is 83. The welding rod is a welding material for the shielded metal arc welding method and consists of a core wire and a coating, and the weight ratio of the coating to the core wire is called the coating weight coefficient of the welding rod.
As a further improvement of the present invention, the preheating temperature in step S3 is 700 degrees celsius, and the heating is performed for 100 seconds.
As a further improvement of the invention, the cleaning agent comprises 100 parts of water, 20 parts of water-soluble silicate, 5 parts of zwitterionic surfactant, 8 parts of hydroxy lauric acid, 15 parts of butanediol propionate and 15 parts of dichlorotetrafluoromethane.
As a further improvement of the invention, the active agent in the step S3 comprises the following components and proportions: 100 parts of silicon dioxide, 45 parts of chromium oxide, 65 parts of ferrotitanium oxide and 40 parts of calcium fluoride.
As a further improvement of the present invention, the welding parameters of the welding operation of step S5 are: the laser power is 3.5KW, the defocusing amount is 8mm, the welding speed is 1.5m/min, and the wire feeding speed is 2.3 m/min.
Example 3
The invention relates to a laser arc fuse welding process capable of avoiding slag inclusion, which comprises the following steps of: s1: fixing a workpiece and polishing a welding part of the workpiece; s2: spraying a cleaning agent on the welding part; s3: preheating before welding: preheating a workpiece before welding; s4: activating the welding surface: after stopping heating, quickly spraying the active agent; s5: after the welding part is dried, welding operation is carried out by adopting a welding rod; s6: and cooling and shaping.
As a further improvement of the invention, the welding rod in the step S6 comprises the following components and proportions: a. the coating comprises the following components: 100 parts of marble, 50 parts of fluorite, 12 parts of silicate, 18 parts of deoxidizer and 30 parts of alloying agent; b. the core wire comprises the following components: c is less than or equal to 0.020%, Si is less than or equal to 0.050%, Mn0.40-0.60%, S is less than or equal to 0.006%, P is less than or equal to 0.006%, Cr is less than or equal to 0.05%, Mo is less than or equal to 0.05%, Ni is less than or equal to 0.05%, Ti is less than or equal to 0.05%, Cu is less than or equal to 0.05%, and As is less than or equal to 0.001%.
As a further improvement of the invention, the welding rod is prepared by a coating machine of a double-deposition electrode through a coating machine of a coating composition, a core wire composition and a binder, the number of the core wires in the welding rod is two, and the coating wraps the two parallel core wires.
As a further improvement of the invention, the spacing between the two cores of the core wires is 1.0 mm.
As a further improvement of the invention, the weight coefficient of the coating is 60. The welding rod is a welding material for the shielded metal arc welding method and consists of a core wire and a coating, and the weight ratio of the coating to the core wire is called the coating weight coefficient of the welding rod.
As a further improvement of the present invention, the preheating temperature in step S3 is 600 degrees celsius, heating for 80 seconds.
As a further improvement of the invention, the cleaning agent comprises 100 parts of water, 15 parts of water-soluble silicate, 2 parts of zwitterionic surfactant, 6 parts of hydroxy lauric acid, 12 parts of butanediol propionate and 12 parts of dichlorotetrafluoromethane.
As a further improvement of the invention, the active agent in the step S3 comprises the following components and proportions: 100 parts of silicon dioxide, 35 parts of chromium oxide, 55 parts of ferrotitanium oxide and 30 parts of calcium fluoride.
As a further improvement of the present invention, the welding parameters of the welding operation of step S5 are: the laser power is 3.2KW, the defocusing amount is 6mm, the welding speed is 1.4m/min, and the wire feeding speed is 2.0 m/min.
Comparative example 1
The invention relates to a laser arc fuse welding process capable of avoiding slag inclusion, which comprises the following steps of: s1: fixing a workpiece and polishing a welding part of the workpiece; s2: spraying a cleaning agent on the welding part; s3: preheating before welding: preheating a workpiece before welding; s4: activating the welding surface: after stopping heating, quickly spraying the active agent; s5: after the welding part is dried, welding operation is carried out by adopting a welding rod; s6: and cooling and shaping.
As a further improvement of the invention, the welding rod in the step S6 comprises the following components and proportions: a. the coating comprises the following components: 100 parts of marble, 50 parts of fluorite, 12 parts of silicate, 18 parts of deoxidizer and 30 parts of alloying agent; b. the core wire comprises the following components: c is less than or equal to 0.020%, Si is less than or equal to 0.050%, Mn0.40-0.60%, S is less than or equal to 0.006%, P is less than or equal to 0.006%, Cr is less than or equal to 0.05%, Mo is less than or equal to 0.05%, Ni is less than or equal to 0.05%, Ti is less than or equal to 0.05%, Cu is less than or equal to 0.05%, and As is less than or equal to 0.001%.
As a further improvement of the invention, the welding rod is prepared by a coating machine of a double-deposition electrode through a coating machine of a coating composition, a core wire composition and a binder, the number of the core wires in the welding rod is two, and the coating wraps the two parallel core wires.
As a further improvement of the invention, the spacing between the two cores of the core wires is 1.0 mm.
As a further improvement of the invention, the weight coefficient of the coating is 60. The welding rod is a welding material for the shielded metal arc welding method and consists of a core wire and a coating, and the weight ratio of the coating to the core wire is called the coating weight coefficient of the welding rod.
As a further improvement of the present invention, the preheating temperature in step S3 is 600 degrees celsius, heating for 80 seconds.
As a further improvement of the invention, the cleaning agent comprises 100 parts of water, 15 parts of water-soluble silicate, 2 parts of zwitterionic surfactant, 6 parts of hydroxy lauric acid and 12 parts of dichlorotetrafluoromethane.
As a further improvement of the invention, the active agent in the step S3 comprises the following components and proportions: 100 parts of silicon dioxide, 35 parts of chromium oxide, 55 parts of ferrotitanium oxide and 30 parts of calcium fluoride.
As a further improvement of the present invention, the welding parameters of the welding operation of step S5 are: the laser power is 3.2KW, the defocusing amount is 6mm, the welding speed is 1.4m/min, and the wire feeding speed is 2.0 m/min.
Comparative example 2
The invention relates to a laser arc fuse welding process capable of avoiding slag inclusion, which comprises the following steps of: s1: fixing a workpiece and polishing a welding part of the workpiece; s2: spraying a cleaning agent on the welding part; s3: preheating before welding: preheating a workpiece before welding; s4: activating the welding surface: after stopping heating, quickly spraying the active agent; s5: after the welding part is dried, welding operation is carried out by adopting a welding rod; s6: and cooling and shaping.
As a further improvement of the invention, the welding rod in the step S6 comprises the following components and proportions: a. the coating comprises the following components: 100 parts of marble, 50 parts of fluorite, 12 parts of silicate, 18 parts of deoxidizer and 30 parts of alloying agent; b. the core wire comprises the following components: c is less than or equal to 0.020%, Si is less than or equal to 0.050%, Mn0.40-0.60%, S is less than or equal to 0.006%, P is less than or equal to 0.006%, Cr is less than or equal to 0.05%, Mo is less than or equal to 0.05%, Ni is less than or equal to 0.05%, Ti is less than or equal to 0.05%, Cu is less than or equal to 0.05%, and As is less than or equal to 0.001%.
As a further improvement of the invention, the welding rod is prepared by a coating machine of a double-deposition electrode through a coating machine of a coating composition, a core wire composition and a binder, the number of the core wires in the welding rod is two, and the coating wraps the two parallel core wires.
As a further improvement of the invention, the spacing between the two cores of the core wires is 1.0 mm.
As a further improvement of the invention, the weight coefficient of the coating is 60. The welding rod is a welding material for the shielded metal arc welding method and consists of a core wire and a coating, and the weight ratio of the coating to the core wire is called the coating weight coefficient of the welding rod.
As a further improvement of the present invention, the preheating temperature in step S3 is 600 degrees celsius, heating for 80 seconds.
As a further improvement of the invention, the cleaning agent comprises 100 parts of water, 15 parts of water-soluble silicate, 2 parts of zwitterionic surfactant, 6 parts of hydroxy lauric acid, 12 parts of butanediol propionate and 12 parts of dichlorotetrafluoromethane.
As a further improvement of the invention, the active agent in the step S3 comprises the following components and proportions: 100 parts of silicon dioxide, 35 parts of chromium oxide and 30 parts of calcium fluoride.
As a further improvement of the present invention, the welding parameters of the welding operation of step S5 are: the laser power is 3.2KW, the defocusing amount is 6mm, the welding speed is 1.4m/min, and the wire feeding speed is 2.0 m/min.
Comparative example 3
The invention relates to a laser arc fuse welding process capable of avoiding slag inclusion, which comprises the following steps of: s1: fixing a workpiece and polishing a welding part of the workpiece; s2: spraying a cleaning agent on the welding part; s3: preheating before welding: preheating a workpiece before welding; s4: activating the welding surface: after stopping heating, quickly spraying the active agent; s5: after the welding part is dried, welding operation is carried out by adopting a welding rod; s6: and cooling and shaping.
As a further improvement of the invention, the welding rod in the step S6 comprises the following components and proportions: a. the coating comprises the following components: 100 parts of marble, 50 parts of fluorite, 12 parts of silicate, 18 parts of deoxidizer and 30 parts of alloying agent; b. the core wire comprises the following components: c is less than or equal to 0.020%, Si is less than or equal to 0.050%, Mn0.40-0.60%, S is less than or equal to 0.006%, P is less than or equal to 0.006%, Cr is less than or equal to 0.05%, Mo is less than or equal to 0.05%, Ni is less than or equal to 0.05%, Ti is less than or equal to 0.05%, Cu is less than or equal to 0.05%, and As is less than or equal to 0.001%.
As a further improvement of the invention, the welding rod is prepared by a coating machine of a double-deposition electrode through a coating machine of a coating composition, a core wire composition and a binder, the number of the core wires in the welding rod is two, and the coating wraps the two parallel core wires.
As a further improvement of the invention, the spacing between the two cores of the core wires is 1.0 mm.
As a further improvement of the invention, the weight coefficient of the coating is 60. The welding rod is a welding material for the shielded metal arc welding method and consists of a core wire and a coating, and the weight ratio of the coating to the core wire is called the coating weight coefficient of the welding rod.
As a further improvement of the present invention, the preheating temperature in step S3 is 600 degrees celsius, heating for 80 seconds.
As a further improvement of the invention, the cleaning agent comprises 100 parts of water, 15 parts of water-soluble silicate, 2 parts of zwitterionic surfactant, 6 parts of hydroxy lauric acid and 12 parts of dichlorotetrafluoromethane.
As a further improvement of the invention, the active agent in the step S3 comprises the following components and proportions: 100 parts of silicon dioxide, 35 parts of chromium oxide and 30 parts of calcium fluoride.
As a further improvement of the present invention, the welding parameters of the welding operation of step S5 are: the laser power is 3.2KW, the defocusing amount is 6mm, the welding speed is 1.4m/min, and the wire feeding speed is 2.0 m/min.
Comparative example 4
The invention relates to a laser arc fuse welding process capable of avoiding slag inclusion, which comprises the following steps of: s1: fixing a workpiece and polishing a welding part of the workpiece; s2: preheating before welding: preheating a workpiece before welding; s3: after the welding part is dried, welding operation is carried out by adopting a welding rod; s4: and cooling and shaping.
As a further improvement of the invention, the welding rod in the step S6 comprises the following components and proportions: a. the coating comprises the following components: 100 parts of marble, 50 parts of fluorite, 12 parts of silicate, 18 parts of deoxidizer and 30 parts of alloying agent; b. the core wire comprises the following components: c is less than or equal to 0.020%, Si is less than or equal to 0.050%, Mn0.40-0.60%, S is less than or equal to 0.006%, P is less than or equal to 0.006%, Cr is less than or equal to 0.05%, Mo is less than or equal to 0.05%, Ni is less than or equal to 0.05%, Ti is less than or equal to 0.05%, Cu is less than or equal to 0.05%, and As is less than or equal to 0.001%.
As a further improvement of the invention, the welding rod is prepared by a coating machine of a double-deposition electrode through a coating machine of a coating composition, a core wire composition and a binder, the number of the core wires in the welding rod is two, and the coating wraps the two parallel core wires.
As a further improvement of the invention, the spacing between the two cores of the core wires is 1.0 mm.
As a further improvement of the invention, the weight coefficient of the coating is 60. The welding rod is a welding material for the shielded metal arc welding method and consists of a core wire and a coating, and the weight ratio of the coating to the core wire is called the coating weight coefficient of the welding rod.
As a further improvement of the present invention, the preheating temperature in step S3 is 600 degrees celsius, heating for 80 seconds.
As a further improvement of the present invention, the welding parameters of the welding operation of step S5 are: the laser power is 3.2KW, the defocusing amount is 6mm, the welding speed is 1.4m/min, and the wire feeding speed is 2.0 m/min.
Test specimens were prepared for the mold knuckles of examples 1 to 3 and comparative examples 1 to 4, and the tensile properties of the weld were tested according to GB/T2651-2008 "tensile test method for welded joints", with the results shown in Table 1 below.
TABLE 1 Performance testing of different samples
| Performance index | Tensile strength (MPa) | Yield strength (MPa) | Elongation (%) | Slag inclusion condition |
| Example 1 | 753.7 | 542.4 | 25.9 | Without slag inclusion |
| Example 2 | 692.7 | 533.9 | 26.7 | Without slag inclusion |
| Example 3 | 782.4 | 563.7 | 29.6 | Without slag inclusion |
| Comparative example 1 | 627.6 | 434.7 | 23.1 | A small amount of slag inclusion |
| Comparative example 2 | 636.7 | 426.5 | 22.4 | A small amount of slag inclusion |
| Comparative example 3 | 522.7 | 327.6 | 16.2 | More slag inclusion |
| Comparative example 4 | 425.6 | 289.4 | 14.6 | More slag inclusion |
As can be seen from Table 1 above, the mechanical properties and slag inclusion of examples 1-3 are significantly better than those of comparative examples 1-4, of which example 3 is the most preferred example. The performance of the embodiment 3 is superior to that of the comparative example 1, which shows that the cleaning agent can completely remove the original oxide layer of the workpiece, effectively avoid slag inclusion and hydrogen pores in the welding seam, and the butanediol propionate in the cleaning agent system can promote the corrugated micro-groove structure on the surface of the workpiece, improve the spreading wettability of molten drops on the surface of the workpiece, increase the adhesive force between the welding seam and the surface of the workpiece, and improve the tensile property and the bending property of the welding seam while avoiding slag inclusion; the performance of the embodiment 3 is superior to that of the comparative example 2, which shows that after the workpiece is preheated, the multi-component active agent is sprayed on the welding part, the penetration depth of the surface of the workpiece can be increased by a system of silicon dioxide, chromium oxide, titanium oxide iron and calcium fluoride, the adhesion performance of the welding line is improved, the forming coefficient of the surface of the welding line can be reduced by the titanium oxide iron, the forming effect is good, and the probability of molten slag inclusion in the welding process can be reduced; the performance of the example 3 is far better than that of the comparative example 3, which shows that the butanediol propionate and the titanium oxide in the cleaning agent synergistically promote the improvement of the mechanical property of the welding line and reduce the slag inclusion probability; the performance of the example 3 is far superior to that of the comparative example 4, which shows that the process steps of the welding process and the reagents used in the process have a synergistic improvement effect on the mechanical properties of the welding seam, so that the welding process steps are optimized, the mechanical properties of the welding seam are further refined and improved, the slag inclusion probability in the welding process is avoided, and the welding stability is improved.
The laser arc fuse welding process for avoiding slag inclusion provided by the invention is described in detail above. The principles and embodiments of the present invention are explained herein using specific examples, which are set forth only to help understand the method and its core ideas of the present invention. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Claims (7)
1. A laser arc fuse welding process capable of avoiding slag inclusion is characterized in that: the method comprises the following steps: s1: fixing a workpiece and polishing a welding part of the workpiece; s2: spraying a cleaning agent on the welding part; s3: preheating before welding: preheating a workpiece before welding; s4: activating the welding surface: after stopping heating, quickly spraying the active agent; s5: after the welding part is dried, welding operation is carried out by adopting a welding rod; s6: and cooling and shaping are adopted, and the welding rod in the step S5 comprises the following components and proportions: a. the coating comprises the following components: 100 parts of marble, 50 parts of fluorite, 10-15 parts of silicate, 15-20 parts of deoxidizer and 25-35 parts of alloying agent; b. the core wire comprises the following components: c is less than or equal to 0.020%, Si is less than or equal to 0.050%, Mn0.40-0.60%, S is less than or equal to 0.006%, P is less than or equal to 0.006%, Cr is less than or equal to 0.05%, Mo is less than or equal to 0.05%, Ni is less than or equal to 0.05%, Ti is less than or equal to 0.05%, Cu is less than or equal to 0.05%, and As is less than or equal to 0.001%; the cleaning agent comprises 100 parts of water, 10-20 parts of water-soluble silicate, 1-5 parts of zwitterionic surfactant, 5-8 parts of hydroxy lauric acid, 10-15 parts of butanediol propionate and 10-15 parts of dichlorotetrafluoromethane; the active agent in the step S3 comprises the following components and proportions: 100 parts of silicon dioxide, 30-45 parts of chromium oxide, 50-65 parts of ferrotitanium oxide and 25-40 parts of calcium fluoride.
2. The process of claim 1, wherein the step of welding comprises: the welding rod is prepared by a coating component, a core wire component and a binder through a double-deposition electrode coating machine, two core wires are arranged in the welding rod, and the coating wraps the two parallel core wires.
3. The process of claim 2, wherein the step of welding comprises: the distance between the two cores of the welding core is 0.8-1.2 mm.
4. The process of claim 3, wherein the step of welding comprises: the distance between the two cores of the welding core is 1.0 mm.
5. The process of claim 1, wherein the step of welding comprises: the weight coefficient of the coating is 45-83%.
6. The process of claim 1, wherein the step of welding comprises: the preheating temperature in the step S3 is 500-700 ℃, and the heating is carried out for 60-100S.
7. The process of claim 1, wherein the step of welding comprises: the welding parameters of the welding operation of the step S5 are: the laser power is 3.0-3.5KW, the defocusing amount is 5-8mm, the welding speed is 1.2-1.5m/min, and the wire feeding speed is 1.8-2.3 m/min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910308532.4A CN109926721B (en) | 2019-04-17 | 2019-04-17 | Laser arc fuse welding process capable of avoiding slag inclusion |
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