CN103962750A - Active agent for MAG welding of stainless steel and using method - Google Patents
Active agent for MAG welding of stainless steel and using method Download PDFInfo
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- CN103962750A CN103962750A CN201310178736.3A CN201310178736A CN103962750A CN 103962750 A CN103962750 A CN 103962750A CN 201310178736 A CN201310178736 A CN 201310178736A CN 103962750 A CN103962750 A CN 103962750A
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- activating agent
- stainless steel
- mgo
- tio
- mgco
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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
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/36—Selection of non-metallic compositions, e.g. coatings, fluxes; Selection of soldering or welding materials, conjoint with selection of non-metallic compositions, both selections being of interest
- B23K35/3601—Selection of non-metallic compositions, e.g. coatings, fluxes; Selection of soldering or welding materials, conjoint with selection of non-metallic compositions, both selections being of interest with inorganic compounds as principal constituents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/36—Selection of non-metallic compositions, e.g. coatings, fluxes; Selection of soldering or welding materials, conjoint with selection of non-metallic compositions, both selections being of interest
- B23K35/362—Selection of compositions of fluxes
-
- 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
- B23K9/173—Arc welding or cutting making use of shielding gas and of a consumable electrode
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Arc Welding In General (AREA)
- Nonmetallic Welding Materials (AREA)
Abstract
The invention relates to an active agent for MAG welding of stainless steel and a using method. The active agent is formed by mixing Cr2O3, MgO, TiO2 and MgCO3 powder particles with the particle sizes of 10 to 80 micrometers and purity of 95% to 99%. According to weight proportion, the raw materials include 40% to 45% of Cr2O3, 20% to 25% of MgO, 30% to 35% of TiO2 and 0% to 10% of MgCO3. The using method includes mixing the mixture mixed fully with organic solution and stirring into paste; grinding base material through a stainless steel wire brush carefully until bright metal is exposed, and removing the greasy dirt on the surface by wiping the surface of a workpiece through acetone; coating the active agent paste on the surface of the welded workpiece to coat the original metal brightness optimally; drying naturally or utilizing an air blower or air channel to blow the surface of the workpiece, and performing MAG welding after the organic solution is volatilized. Welding joint forming and organizing are optimized, welding joint penetration is increased, and welding joint performance is improved.
Description
Technical field
The present invention relates to materials processing engineering field, especially a kind of activating agent and using method for stainless steel MAG welding.
Background technology
Stainless steel has the advantages such as good plasticity, toughness, corrosion resistance, is day by day used widely in industries such as pressure vessels for the chemical industry, Aero-Space, boats and ships vehicle, power electronics, becomes one of the most frequently used metal material.But stainless steel hot conductivity is low, linear expansion coefficient is large, and welding deformation is large.
When stainless steel welding adopts multi-pass welding, due to the effect of multiple welding thermal cycle, be easy to cause sheet deformation, tissue and performance are affected, therefore, if can find the welding procedure mode that reduces heat input when realization improves weld penetration, this will be effectively method in to improving joint microstructure with improving performance.In welding, adopt the mode of adding activating agent can realize above effect.
Activating agent technology is to be coated in surface of the work to be welded by containing some micro-active material before weldering, then welds, to improve weldquality and shaping.This welding method, for improving welding efficiency, is improved welding quality, reduces welding cost, and increasing weld penetration has positive role.
Carry out the welding of the materials such as steel, titanium, aluminium during with common fusion welding method, due to electric arc spread heat and the reason such as electric arc impulsive force numerical value is low, under normal welding parameter, consider the requirement of the shaping aspects such as welding seam deep width ratio, individual layer welding is merely able to obtain less fusion penetration conventionally.For the welding of the larger sheet material of thickness, tubing and special joint, needing under the condition of the complete penetration in the back side, just need to carry out groove processing and adopt multilayer welding.In order to increase fusion penetration, improve welding efficiency, middle 1960s, a bar institute of welding has proposed the concept of activate TIG weldering and has done correlative study.Result of study shows, the activating agent of certain composition is coated in to the weld zone of welded part mother metal, and under normal specification, welding penetration increases substantially.There are the tendency of further investigation in Abroad in Recent Years scientific research institution and branch of industry to activate soldering method, and have formed concept and the technology of A-TIG weldering.The use of activating agent has significantly improved TIG welding efficiency, while saving Welder.
Compared with TIG weldering, MAG welding method itself has higher deposition efficiency and larger welding penetration.If can by activating agent and MAG in conjunction with so that develop concept and the technology of A-MAG weldering, likely further increase welding penetration, improve welding efficiency.
Application number is 201010230874.8 patent: a kind of method that improves aluminum alloy MIG welding seam penetration, a kind of method that improves aluminum alloy MIG welding seam penetration is disclosed, belong to materials processing engineering field, the concrete technology step of the method is: the first step, adopting granularity is the SiO that 40-80 μ m, purity are 99.9%
2, Cr
2o
3, Al
2o
3and TiO
2powder particle, after evenly mixing, is prepared into the agent of aluminum alloy MIG welding special active by the combination of certain ingredients proportioning, and its composition counts by weight percentage (Wt.%): SiO
2: 78-96; Cr
2o
3: 2-12; Al
2o
3: 1-5; TiO
2: 1-5; Second step, the aluminum alloy MIG welding special active agent preparing by above-mentioned design mix adopts plasma spray to be applied to welded aluminum alloy junction member surface, adopt MIG weldering welding aluminum alloy structural member, can realize the fusion penetration that significantly improves MIG welding line in the situation that of equal heat input.But the activating agent in above-mentioned patent is applicable in the welding of aluminium alloy, and be not suitable for stainless welding.
Given this present invention is proposed.
Summary of the invention
Object of the present invention, for overcoming the deficiencies in the prior art, provides a kind of activating agent for stainless steel MAG welding, can improve appearance of weld, seam organization, increases weld penetration and improves Weld Performance.
Another object of the present invention is for providing a kind of using method of the activating agent for stainless steel MAG welding.
In order to realize this object, the present invention adopts following technical scheme:
For an activating agent for stainless steel MAG welding, described activating agent by granularity be 10～80 μ m, purity is 95%～99% Cr
2o
3, MgO, TiO
2and MgCO
3powder particle compositions of mixtures, its composition distributes by weight percentage and is respectively Cr
2o
3: 40%～45%, MgO:20%～25%, TiO
2: 30%～35%, MgCO
3: 0%～10%.
Cr in described activating agent
2o
3, MgO, TiO
2and MgCO
3powder particle composition, its composition distributes by weight percentage, is respectively Cr
2o
3: 43%～45%, MgO:20%～24%, TiO
2: 31%～34%, MgCO
3: 0%～5%.
Cr in described activating agent
2o
3, MgO, TiO
2and MgCO
3powder particle composition, its composition distributes by weight percentage, is respectively Cr
2o
3: 43%～45%, MgO:21%～23%, TiO
2: 31%～34%, MgCO
3: 0%～5%.
Preferably Cr in described activating agent
2o
3, MgO, TiO
2and MgCO
3powder particle composition, its composition distributes by weight percentage, is respectively Cr
2o
3: 45%, MgO:22%, TiO
2: 31%, MgCO
3: 2%.
Preferably Cr in described activating agent
2o
3, MgO, TiO
2and MgCO
3powder particle composition, its composition distributes by weight percentage, is respectively Cr
2o
3: 44%, MgO:23%, TiO
2: 32%, MgCO
3: 1%.
Preferably Cr in described activating agent
2o
3, MgO, TiO
2and MgCO
3powder particle composition, its composition distributes by weight percentage, is respectively Cr
2o
3: 43%, MgO:22%, TiO
2: 33%, MgCO
3: 2%.
The using method of the above-mentioned activating agent for stainless steel MAG welding, carry out according to following steps:
The first step: carry out by weight ratio activating agent batching and make the activating agent for stainless steel MAG welding, mix with organic solution after fully mixing, stir into pasty state;
Second step: mother metal is carefully polished with stainless steel wire brush, until expose bright metal, use acetone wiping surface of the work to remove surface and oil contaminant;
The 3rd step: the pasty state activating agent preparing in the first step is coated in to welding work pieces surface, is advisable to cover original metallic luster;
The 4th step: natural air drying or utilize hair-dryer or air channel wind to surface of the work, after organic solution volatilization, carry out MAG welding.
Described organic solution is the hydroxy ethyl fiber cellulose solution of acetone or 1%.
Described activating agent coating width is than at least large 20mm of weld width.
Described activating agent coated weight is 5-7mg/cm
2.
Adopt after technical solutions according to the invention, bring following beneficial effect:
1, stainless steel applies activating agent of the present invention and carries out after MAG welding, weld penetration be 1.5 times of uncoated activating agent fusion penetration and more than;
2, the interpolation of activating agent can improve weld seam core rigidities;
3, stainless steel applies activating agent of the present invention and carries out after MAG welding, and tensile strength improves about 20MPa;
4, before and after use activating agent, the fracture mode of joint is ductile rupture, but after coating activating agent, the axle dimple that waits of fracture becomes more tiny even;
5, the use of activating agent can improve the impact property of welding point, and wherein the effect of one-component MgO is the most obvious.
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in further detail.
Brief description of the drawings
Fig. 1: apply active flux welding schematic diagram in the present invention
Fig. 2: uncoated activating agent weld penetration schematic diagram in the present invention
Fig. 3: apply activating agent weld penetration schematic diagram in the present invention
Fig. 4: apply active flux welding joint stretching fracture scanning electron microscope (SEM) photograph in the present invention
Fig. 5: uncoated active flux welding joint stretching fracture scanning electron microscope (SEM) photograph in the present invention
Fig. 6: apply seam organization figure after active flux welding in the present invention
Fig. 7: seam organization figure after uncoated active flux welding in the present invention
Wherein: 1, activating agent, 2, welding work pieces, 3, welding gun, 4, molten bath, 5, weld seam.
Detailed description of the invention
A kind of activating agent for stainless steel MAG welding of the present invention, described activating agent by granularity be 10～80 μ m, purity is 95%～99% Cr
2o
3, MgO, TiO
2and MgCO
3powder particle compositions of mixtures, its composition distributes by weight percentage and is respectively Cr
2o
3: 40%～45%, MgO:20%～25%, TiO
2: 30%～35%, MgCO
3: 0%～10%.
Preferably Cr in described activating agent
2o
3, MgO, TiO
2and MgCO
3powder particle composition, its composition distributes by weight percentage, is respectively Cr
2o
3: 43%～45%, MgO:20%～24%, TiO
2: 31%～34%, MgCO
3: 0%～5%.
Further Cr in preferred described activating agent
2o
3, MgO, TiO
2and MgCO
3powder particle composition, its composition distributes by weight percentage, is respectively Cr
2o
3: 43%～45%, MgO:21%～23%, TiO
2: 31%～34%, MgCO
3: 0%～5%.
Preferably Cr in described activating agent
2o
3, MgO, TiO
2and MgCO
3powder particle composition, its composition distributes by weight percentage, is respectively Cr
2o
3: 45%, MgO:22%, TiO
2: 31%, MgCO
3: 2%.
Preferably Cr in described activating agent
2o
3, MgO, TiO
2and MgCO
3powder particle composition, its composition distributes by weight percentage, is respectively Cr
2o
3: 44%, MgO:23%, TiO
2: 32%, MgCO
3: 1%.
Preferably Cr in described activating agent
2o
3, MgO, TiO
2and MgCO
3powder particle composition, its composition distributes by weight percentage, is respectively Cr
2o
3: 43%, MgO:22%, TiO
2: 33%, MgCO
3: 2%.
The using method of the above-mentioned activating agent for stainless steel MAG welding, carry out according to following steps:
The first step: carry out by weight ratio activating agent batching and make the activating agent for stainless steel MAG welding, mix with organic solution after fully mixing, stir into pasty state;
Second step: mother metal is carefully polished with stainless steel wire brush, until expose bright metal, use acetone wiping surface of the work to remove surface and oil contaminant;
The 3rd step: the pasty state activating agent preparing in the first step is coated in to welding work pieces surface, is advisable to cover original metallic luster;
The 4th step: natural air drying or utilize hair-dryer or air channel wind to surface of the work, after organic solution volatilization, carry out MAG welding.
Described organic solution is the hydroxy ethyl fiber cellulose solution of acetone or 1%, and described activating agent coating width is than at least large 20mm of weld width, and described activating agent coated weight is 5-7mg/cm
2, preferably activating agent coated weight is 6mg/cm
2.
Stainless steel applies activating agent of the present invention to carry out after MAG welding, and weld penetration is 1.5 times of uncoated activating agent fusion penetration and above (referring to Fig. 2, Fig. 3); The interpolation of activating agent can improve weld seam core rigidities; Stainless steel applies activating agent of the present invention to carry out after MAG welding, and tensile strength improves about 20MPa; Use before and after activating agent of the present invention, the fracture mode of joint is ductile rupture, but after coating activating agent, the axle dimple that waits of fracture becomes more tiny even; The use of activating agent can improve the impact property of welding point, and wherein the effect of one-component MgO is the most obvious.
As shown in Figure 1, be to apply the welding schematic diagram of activating agent, activating agent coating width be coating width than at least large 20mm of weld width, suppose that weld width is d, coating width should be not less than (d+20) mm, activating agent coated weight is 5-7mg/cm
2.Welding gun is perpendicular to welding work pieces surface.
The MAG welding that preferably adopts Austrian TPS FRONIUS welding machine to carry out in the present invention, welding condition sees the following form 1:
Table 1:
As shown in Figure 4, Figure 5, apply the joint stretching fracture ESEM contrast of activating agent front and back, Fig. 4 is fracture scintigram after coating activating agent, and Fig. 5 is uncoated activating agent fracture scintigram.Known by contrasting, the axle dimple that waits that adds the afterwards tough type fracture of activating agent fracture becomes more tiny even.
As shown in Figure 6, Figure 7, seam organization contrast after seam organization and uncoated active flux welding after coating active flux welding, Fig. 6 is the seam organization figure applying after activating agent, the seam organization figure that Fig. 7 is uncoated activating agent.Contrast as seen, the interpolation of activating agent has only changed tissue texture to lesser extent, and organizing is still austenite dendrites tissue.
Embodiment mono-
Welding step in the present embodiment: the first step: carry out by weight ratio activating agent batching and make the activating agent for stainless steel MAG welding, wherein: its composition distributes by weight percentage, is respectively Cr
2o
3: 45%, MgO:22%, TiO
2: 31%, MgCO
3: 2%.After fully mixing, mix with organic solution, stir into pasty state;
Second step: mother metal is carefully polished with stainless steel wire brush, until expose bright metal, use acetone wiping surface of the work to remove surface and oil contaminant;
The 3rd step: the pasty state activating agent preparing in the first step is coated in to welding work pieces surface, is advisable to cover original metallic luster;
The 4th step: natural air drying or utilize hair-dryer or air channel wind to surface of the work, after organic solution volatilization, carry out MAG welding.
The hydroxy ethyl fiber cellulose solution that the machine solution using is acetone or 1%, activating agent coating width is than at least large 20mm of weld width, and activating agent coated weight is 5-7mg/cm
2.
In the present embodiment, weld penetration is 1.5 times of uncoated activating agent fusion penetration; The interpolation of activating agent can improve weld seam core rigidities; Stainless steel applies activating agent of the present invention to carry out after MAG welding, and tensile strength improves about 20MPa; Use before and after activating agent of the present invention, the fracture mode of joint is ductile rupture, but after coating activating agent, the axle dimple that waits of fracture becomes more tiny even; The use of activating agent can improve the impact property of welding point.
Embodiment bis-
Welding step in the present embodiment: the first step: carry out by weight ratio activating agent batching and make the activating agent for stainless steel MAG welding, wherein: its composition distributes by weight percentage, is respectively Cr
2o
3: 44%, MgO:23%, TiO
2: 32%, MgCO
3: 1%.After fully mixing, mix with organic solution, stir into pasty state;
Second step: mother metal is carefully polished with stainless steel wire brush, until expose bright metal, use acetone wiping surface of the work to remove surface and oil contaminant;
The 3rd step: the pasty state activating agent preparing in the first step is coated in to welding work pieces surface, is advisable to cover original metallic luster;
The 4th step: natural air drying or utilize hair-dryer or air channel wind to surface of the work, after organic solution volatilization, carry out MAG welding.
The hydroxy ethyl fiber cellulose solution that the machine solution using is acetone or 1%, activating agent coating width is than at least large 20mm of weld width, and activating agent coated weight is 5-7mg/cm
2.
In the present embodiment, weld penetration is 1.5 times of uncoated activating agent fusion penetration; The interpolation of activating agent can improve weld seam core rigidities; Stainless steel applies activating agent of the present invention to carry out after MAG welding, and tensile strength improves about 20MPa; Use before and after activating agent of the present invention, the fracture mode of joint is ductile rupture, but after coating activating agent, the axle dimple that waits of fracture becomes more tiny even; The use of activating agent can improve the impact property of welding point.
Embodiment tri-
Welding step in the present embodiment: the first step: carry out by weight ratio activating agent batching and make the activating agent for stainless steel MAG welding, wherein: its composition distributes by weight percentage, is respectively Cr
2o
3: 43%, MgO:22%, TiO
2: 33%, MgCO
3: 2%.After fully mixing, mix with organic solution, stir into pasty state;
Second step: mother metal is carefully polished with stainless steel wire brush, until expose bright metal, use acetone wiping surface of the work to remove surface and oil contaminant;
The 3rd step: the pasty state activating agent preparing in the first step is coated in to welding work pieces surface, is advisable to cover original metallic luster;
The 4th step: natural air drying or utilize hair-dryer or air channel wind to surface of the work, after organic solution volatilization, carry out MAG welding.
The hydroxy ethyl fiber cellulose solution that the machine solution using is acetone or 1%, activating agent coating width is than at least large 20mm of weld width, and activating agent coated weight is 5-7mg/cm
2.
In the present embodiment, weld penetration is 1.5 times of uncoated activating agent fusion penetration; The interpolation of activating agent can improve weld seam core rigidities; Stainless steel applies activating agent of the present invention to carry out after MAG welding, and tensile strength improves about 20MPa; Use before and after activating agent of the present invention, the fracture mode of joint is ductile rupture, but after coating activating agent, the axle dimple that waits of fracture becomes more tiny even; The use of activating agent can improve the impact property of welding point.
Embodiment tetra-
Welding step in the present embodiment: the first step: carry out by weight ratio activating agent batching and make the activating agent for stainless steel MAG welding, wherein: its composition distributes by weight percentage, is respectively Cr
2o
3: 40%, MgO:20%, TiO
2: 34%, MgCO
3: 6%.After fully mixing, mix with organic solution, stir into pasty state;
Second step: mother metal is carefully polished with stainless steel wire brush, until expose bright metal, use acetone wiping surface of the work to remove surface and oil contaminant;
The 3rd step: the pasty state activating agent preparing in the first step is coated in to welding work pieces surface, is advisable to cover original metallic luster;
The 4th step: natural air drying or utilize hair-dryer or air channel wind to surface of the work, after organic solution volatilization, carry out MAG welding.
The hydroxy ethyl fiber cellulose solution that the machine solution using is acetone or 1%, activating agent coating width is than at least large 20mm of weld width, and activating agent coated weight is 6mg/cm
2.
In the present embodiment, weld penetration is 1.5 times of uncoated activating agent fusion penetration; The interpolation of activating agent can improve weld seam core rigidities; Stainless steel applies activating agent of the present invention to carry out after MAG welding, and tensile strength improves about 20MPa; Use before and after activating agent of the present invention, the fracture mode of joint is ductile rupture, but after coating activating agent, the axle dimple that waits of fracture becomes more tiny even; The use of activating agent can improve the impact property of welding point.
Embodiment five
Welding step in the present embodiment: the first step: carry out by weight ratio activating agent batching and make the activating agent for stainless steel MAG welding, wherein: its composition distributes by weight percentage, is respectively Cr
2o
3: 40%, MgO:25%, TiO
2: 35%.After fully mixing, mix with organic solution, stir into pasty state;
Second step: mother metal is carefully polished with stainless steel wire brush, until expose bright metal, use acetone wiping surface of the work to remove surface and oil contaminant;
The 3rd step: the pasty state activating agent preparing in the first step is coated in to welding work pieces surface, is advisable to cover original metallic luster;
The 4th step: natural air drying or utilize hair-dryer or air channel wind to surface of the work, after organic solution volatilization, carry out MAG welding.
The hydroxy ethyl fiber cellulose solution that the machine solution using is acetone or 1%, activating agent coating width is than at least large 20mm of weld width, and activating agent coated weight is 5mg/cm
2.
In the present embodiment, weld penetration is 1.5 times of uncoated activating agent fusion penetration; The interpolation of activating agent can improve weld seam core rigidities; Stainless steel applies activating agent of the present invention to carry out after MAG welding, and tensile strength improves about 20MPa; Use before and after activating agent of the present invention, the fracture mode of joint is ductile rupture, but after coating activating agent, the axle dimple that waits of fracture becomes more tiny even; The use of activating agent can improve the impact property of welding point.
Embodiment six
Welding step in the present embodiment: the first step: carry out by weight ratio activating agent batching and make the activating agent for stainless steel MAG welding, wherein: its composition distributes by weight percentage, is respectively Cr
2o
3: 41%, MgO:24%, TiO
2: 30%, MgCO
3: 5%.After fully mixing, mix with organic solution, stir into pasty state;
Second step: mother metal is carefully polished with stainless steel wire brush, until expose bright metal, use acetone wiping surface of the work to remove surface and oil contaminant;
The 3rd step: the pasty state activating agent preparing in the first step is coated in to welding work pieces surface, is advisable to cover original metallic luster;
The 4th step: natural air drying or utilize hair-dryer or air channel wind to surface of the work, after organic solution volatilization, carry out MAG welding.
The hydroxy ethyl fiber cellulose solution that the machine solution using is acetone or 1%, activating agent coating width is than at least large 20mm of weld width, and activating agent coated weight is 7mg/cm
2.
In the present embodiment, weld penetration is 1.5 times of uncoated activating agent fusion penetration; The interpolation of activating agent can improve weld seam core rigidities; Stainless steel applies activating agent of the present invention to carry out after MAG welding, and tensile strength improves about 20MPa; Use before and after activating agent of the present invention, the fracture mode of joint is ductile rupture, but after coating activating agent, the axle dimple that waits of fracture becomes more tiny even; The use of activating agent can improve the impact property of welding point.
Embodiment seven
Welding step in the present embodiment: the first step: carry out by weight ratio activating agent batching and make the activating agent for stainless steel MAG welding, wherein: its composition distributes by weight percentage, is respectively Cr
2o
3: 45%, MgO:21%, TiO
2: 34%.After fully mixing, mix with organic solution, stir into pasty state;
Second step: mother metal is carefully polished with stainless steel wire brush, until expose bright metal, use acetone wiping surface of the work to remove surface and oil contaminant;
The 3rd step: the pasty state activating agent preparing in the first step is coated in to welding work pieces surface, is advisable to cover original metallic luster;
The 4th step: natural air drying or utilize hair-dryer or air channel wind to surface of the work, after organic solution volatilization, carry out MAG welding.
The hydroxy ethyl fiber cellulose solution that the machine solution using is acetone or 1%, activating agent coating width is than at least large 20mm of weld width, and activating agent coated weight is 7mg/cm
2.
In the present embodiment, weld penetration is 1.5 times of uncoated activating agent fusion penetration; The interpolation of activating agent can improve weld seam core rigidities; Stainless steel applies activating agent of the present invention to carry out after MAG welding, and tensile strength improves about 20MPa; Use before and after activating agent of the present invention, the fracture mode of joint is ductile rupture, but after coating activating agent, the axle dimple that waits of fracture becomes more tiny even; The use of activating agent can improve the impact property of welding point.
The foregoing is only the preferred embodiment of the present invention, it should be pointed out that for the ordinary skill in the art, without departing from the principles of the present invention, can also make various deformation and improvement, this also should be considered as protection scope of the present invention.
Claims (10)
1. for an activating agent for stainless steel MAG welding, it is characterized in that: described activating agent by granularity be 10～80 μ m, purity is 95%～99% Cr
2o
3, MgO, TiO
2and MgCO
3powder particle compositions of mixtures, its composition distributes by weight percentage and is respectively Cr
2o
3: 40%～45%, MgO:20%～25%, TiO
2: 30%～35%, MgCO
3: 0%～10%.
2. a kind of activating agent for stainless steel MAG welding according to claim 1, is characterized in that: Cr in described activating agent
2o
3, MgO, TiO
2and MgCO
3powder particle composition, its composition distributes by weight percentage, is respectively Cr
2o
3: 43%～45%, MgO:20%～24%, TiO
2: 31%～34%, MgCO
3: 0%～5%.
3. a kind of activating agent for stainless steel MAG welding according to claim 2, is characterized in that: Cr in described activating agent
2o
3, MgO, TiO
2and MgCO
3powder particle composition, its composition distributes by weight percentage, is respectively Cr
2o
3: 43%～45%, MgO:21%～23%, TiO
2: 31%～34%, MgCO
3: 0%～5%.
4. a kind of activating agent for stainless steel MAG welding according to claim 3, is characterized in that: Cr in described activating agent
2o
3, MgO, TiO
2and MgCO
3powder particle composition, its composition distributes by weight percentage, is respectively Cr
2o
3: 45%, MgO:22%, TiO
2: 31%, MgCO
3: 2%.
5. a kind of activating agent for stainless steel MAG welding according to claim 3, is characterized in that: Cr in described activating agent
2o
3, MgO, TiO
2and MgCO
3powder particle composition, its composition distributes by weight percentage, is respectively Cr
2o
3: 44%, MgO:23%, TiO
2: 32%, MgCO
3: 1%.
6. a kind of activating agent for stainless steel MAG welding according to claim 3, is characterized in that: Cr in described activating agent
2o
3, MgO, TiO
2and MgCO
3powder particle composition, its composition distributes by weight percentage, is respectively Cr
2o
3: 43%, MgO:22%, TiO
2: 33%, MgCO
3: 2%.
7. according to the using method of the arbitrary described activating agent for stainless steel MAG welding of claim 1-6, it is characterized in that, carry out according to following steps:
The first step: carry out by weight ratio activating agent batching and make the activating agent for stainless steel MAG welding, mix with organic solution after fully mixing, stir into pasty state;
Second step: mother metal is carefully polished with stainless steel wire brush, until expose bright metal, use acetone wiping surface of the work to remove surface and oil contaminant;
The 3rd step: the pasty state activating agent preparing in the first step is coated in to welding work pieces surface, is advisable to cover original metallic luster;
The 4th step: natural air drying or utilize hair-dryer or air channel wind to surface of the work, after organic solution volatilization, carry out MAG welding.
8. the using method of the activating agent for stainless steel MAG welding according to claim 7, is characterized in that, described organic solution is the hydroxy ethyl fiber cellulose solution of acetone or 1%.
9. the using method of the activating agent for stainless steel MAG welding according to claim 7, is characterized in that, described activating agent coating width is than at least large 20mm of weld width.
10. the using method of the activating agent for stainless steel MAG welding according to claim 7, is characterized in that, described activating agent coated weight is 5-7mg/cm
2.
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