CN103962750B - A kind of activating agent for stainless steel MAG welding and using method - Google Patents
A kind of activating agent for stainless steel MAG welding and using method Download PDFInfo
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- CN103962750B CN103962750B CN201310178736.3A CN201310178736A CN103962750B CN 103962750 B CN103962750 B CN 103962750B CN 201310178736 A CN201310178736 A CN 201310178736A CN 103962750 B CN103962750 B CN 103962750B
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- tio
- mgco
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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
- 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)
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Nonmetallic Welding Materials (AREA)
- Arc Welding In General (AREA)
Abstract
The present invention relates to a kind of for stainless steel MAG weld activating agent and using method, by granularity be 10 ~ 80 μm, purity be 95% ~ 99% Cr
2o
3, MgO, TiO
2and MgCO
3powder particle mixture forms, and is respectively Cr by weight percentage
2o
3: 40% ~ 45%, MgO:20% ~ 25%, TiO
2: 30% ~ 35%, MgCO
3: 0% ~ 10%, mix with organic solution after sufficiently mixing, stir into pasty state; Mother metal stainless steel wire brush is carefully polished, until expose the metal of light, with acetone wiping surface of the work to remove surface and oil contaminant; Pasty state activating agent is coated in welding work pieces surface, is advisable to cover original metallic luster; Natural air drying or utilize hair-dryer or air channel wind to surface of the work, carries out MAG welding, improves appearance of weld, seam organization after organic solution volatilization, increases weld penetration and improves Weld Performance.
Description
Technical field
The present invention relates to materials processing engineering field, especially a kind of activating agent for stainless steel MAG welding and using method.
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 large, and welding deformation is large.
During stainless steel welded employing multi-pass welding, due to the effect of multiple welding thermal cycle, be easy to cause sheet deformation, structure and properties is affected, therefore, if can find the welding procedure mode reducing heat input while realizing improving weld penetration, this will be effectively method in improving joint microstructure and improving performance.In welding, adopt the mode of adding activating agent can realize above effect.
Activating agent technology is, before weldering, the active material containing some trace element is coated in surface of the work to be welded, then welds, to improve weldquality and shaping.This welding method, for raising welding efficiency, improves welding quality, reduces welding cost, and increasing weld penetration has positive role.
When carrying out the welding of the materials such as steel, titanium, aluminium 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 weld parameter, consider the requirement of the shaping aspects such as welding seam deep width ratio, usual individual layer welding is merely able to obtain less fusion penetration.For the welding of larger sheet material, tubing and the special joint of thickness, under the condition needing the complete penetration in the back side, just need to carry out retaining wall on slope and adopt multilayer welding.In order to increase fusion penetration, improve welding efficiency, middle 1960s, a bar institute of welding proposes the concept of activating flux TIC welding and has done correlative study.Result of study shows, the activating agent of certain composition is coated in 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 defined concept and the technology of A-TIG weldering.The use of activating agent significantly improves TIG welding efficiency, when saving Welder.
Compared with welding with TIG, MAG welding method itself has higher deposition efficiency and larger welding penetration.If activating agent and MAG can be combined and then develop concept and the technology of A-MAG weldering, then likely increase welding penetration further, improve welding efficiency.
Application number is the patent of 201010230874.8: a kind of method improving aluminum alloy MIG welding seam penetration, disclose a kind of method improving aluminum alloy MIG welding seam penetration, belong to materials processing engineering field, the concrete technology step of the method is: the first step, and employing granularity is 40-80 μm, purity is the SiO of 99.9%
2, Cr
2o
3, Al
2o
3and TiO
2powder particle, by the combination of certain ingredients proportioning after Homogeneous phase mixing, be prepared into the agent of aluminum alloy MIG welding special active, 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 prepared by above-mentioned design mix adopts plasma spray to be applied to welded aluminum alloy junction component surface, adopt MIG to weld welding aluminum alloy structural member, the fusion penetration significantly improving MIG welding line when equal heat input can be realized.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 welded for stainless steel MAG, 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 stainless steel MAG weld an activating agent, described activating agent by granularity be 10 ~ 80 μm, purity be 95% ~ 99% Cr
2o
3, MgO, TiO
2and MgCO
3powder particle mixture forms, and 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 forms, and 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 forms, and its composition distributes by weight percentage, is respectively Cr
2o
3: 43% ~ 45%, MgO:21% ~ 23%, TiO
2: 31% ~ 34%, MgCO
3: 0% ~ 5%.
Cr in preferably described activating agent
2o
3, MgO, TiO
2and MgCO
3powder particle forms, and its composition distributes by weight percentage, is respectively Cr
2o
3: 45%, MgO:22%, TiO
2: 31%, MgCO
3: 2%.
Cr in preferably described activating agent
2o
3, MgO, TiO
2and MgCO
3powder particle forms, and its composition distributes by weight percentage, is respectively Cr
2o
3: 44%, MgO:23%, TiO
2: 32%, MgCO
3: 1%.
Cr in preferably described activating agent
2o
3, MgO, TiO
2and MgCO
3powder particle forms, and 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 activating agent batching by weight ratio and make the activating agent welded for stainless steel MAG, mix with organic solution after fully mixing, stir into pasty state;
Second step: carefully polished by mother metal stainless steel wire brush, until the metal exposing light, with acetone wiping surface of the work to remove surface and oil contaminant;
3rd step: the pasty state activating agent prepared in the first step is coated in welding work pieces surface, is advisable to cover original metallic luster;
4th step: natural air drying or utilize hair-dryer or air channel wind to surface of the work, carries out MAG welding after organic solution volatilization.
Described organic solution is the hydroxyethyl cellulose solution of acetone or 1%.
Described activating agent coating width 20mm at least larger than weld width.
Described activating agent coated weight is 5-7mg/cm
2.
After adopting technical solutions according to the invention, bring following beneficial effect:
1, stainless steel applies after activating agent of the present invention carries out 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 pipe mill hardness;
3, stainless steel applies after activating agent of the present invention carries out MAG welding, and tensile strength improves about 20MPa;
4, use before and after activating agent, the fracture mode of joint is ductile rupture, but after coating activating agent, the axle dimple that waits of fracture becomes fine uniform more;
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.
Accompanying drawing explanation
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 bond pull Fracture scan Electronic Speculum figure in the present invention
Fig. 5: uncoated active flux welding bond pull Fracture scan Electronic Speculum figure 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
Of the present invention a kind of for stainless steel MAG weld activating agent, described activating agent by granularity be 10 ~ 80 μm, purity be 95% ~ 99% Cr
2o
3, MgO, TiO
2and MgCO
3powder particle mixture forms, and 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 preferably described activating agent
2o
3, MgO, TiO
2and MgCO
3powder particle forms, and 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 activating agent preferably described further
2o
3, MgO, TiO
2and MgCO
3powder particle forms, and its composition distributes by weight percentage, is respectively Cr
2o
3: 43% ~ 45%, MgO:21% ~ 23%, TiO
2: 31% ~ 34%, MgCO
3: 0% ~ 5%.
Cr in preferably described activating agent
2o
3, MgO, TiO
2and MgCO
3powder particle forms, and its composition distributes by weight percentage, is respectively Cr
2o
3: 45%, MgO:22%, TiO
2: 31%, MgCO
3: 2%.
Cr in preferably described activating agent
2o
3, MgO, TiO
2and MgCO
3powder particle forms, and its composition distributes by weight percentage, is respectively Cr
2o
3: 44%, MgO:23%, TiO
2: 32%, MgCO
3: 1%.
Cr in preferably described activating agent
2o
3, MgO, TiO
2and MgCO
3powder particle forms, and 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 activating agent batching by weight ratio and make the activating agent welded for stainless steel MAG, mix with organic solution after fully mixing, stir into pasty state;
Second step: carefully polished by mother metal stainless steel wire brush, until the metal exposing light, with acetone wiping surface of the work to remove surface and oil contaminant;
3rd step: the pasty state activating agent prepared in the first step is coated in welding work pieces surface, is advisable to cover original metallic luster;
4th step: natural air drying or utilize hair-dryer or air channel wind to surface of the work, carries out MAG welding after organic solution volatilization.
Described organic solution is the hydroxyethyl cellulose solution of acetone or 1%, and described activating agent coating width 20mm at least larger than weld width, described activating agent coated weight is 5-7mg/cm
2, preferred activating agent coated weight is 6mg/cm
2.
Stainless steel applies after activating agent of the present invention carries out MAG welding, and weld penetration is 1.5 times of uncoated activating agent fusion penetration and above (see Fig. 2, Fig. 3); The interpolation of activating agent can improve Weld pipe mill hardness; Stainless steel applies after activating agent of the present invention carries out 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 fine uniform more; 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, for applying the welding schematic diagram of activating agent, activating agent coating width is coating width 20mm at least larger than weld width, and namely suppose that weld width is d, coating width should be not less than (d+20) mm, and activating agent coated weight is 5-7mg/cm
2.Welding gun is perpendicular to welding work pieces surface.
Preferably adopt the MAG welding that Austrian TPSFRONIUS welding machine carries out in the present invention, welding condition sees the following form 1:
Table 1:
As shown in Figure 4, Figure 5, bond pull Fracture scan Electronic Speculum contrast before and after coating activating agent, Fig. 4 is that after coating activating agent, Fracture scan figure, Fig. 5 are uncoated activating agent Fracture scan figure.Known by contrasting, after adding activating agent, the axle dimple that waits of tough type ruptured interruption becomes fine uniform more.
As shown in Figure 6, Figure 7, after coating active flux welding, after seam organization and uncoated active flux welding, seam organization contrasts, and Fig. 6 is the seam organization figure after applying activating agent, and Fig. 7 is the seam organization figure of uncoated activating agent.Contrast visible, the interpolation of activating agent only changes tissue texture to lesser extent, and organizing is still austenite dendrites tissue.
Embodiment one
Welding step in the present embodiment: the first step: carry out activating agent batching by weight ratio and make the activating agent welded for stainless steel MAG, wherein: its composition distributes by weight percentage, is respectively Cr
2o
3: 45%, MgO:22%, TiO
2: 31%, MgCO
3: 2%.Mix with organic solution after fully mixing, stir into pasty state;
Second step: carefully polished by mother metal stainless steel wire brush, until the metal exposing light, with acetone wiping surface of the work to remove surface and oil contaminant;
3rd step: the pasty state activating agent prepared in the first step is coated in welding work pieces surface, is advisable to cover original metallic luster;
4th step: natural air drying or utilize hair-dryer or air channel wind to surface of the work, carries out MAG welding after organic solution volatilization.
Use machine solution for acetone or 1% hydroxyethyl cellulose solution, activating agent coating width 20mm at least larger than weld width, 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 pipe mill hardness; Stainless steel applies after activating agent of the present invention carries out 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 fine uniform more; The use of activating agent can improve the impact property of welding point.
Embodiment two
Welding step in the present embodiment: the first step: carry out activating agent batching by weight ratio and make the activating agent welded for stainless steel MAG, wherein: its composition distributes by weight percentage, is respectively Cr
2o
3: 44%, MgO:23%, TiO
2: 32%, MgCO
3: 1%.Mix with organic solution after fully mixing, stir into pasty state;
Second step: carefully polished by mother metal stainless steel wire brush, until the metal exposing light, with acetone wiping surface of the work to remove surface and oil contaminant;
3rd step: the pasty state activating agent prepared in the first step is coated in welding work pieces surface, is advisable to cover original metallic luster;
4th step: natural air drying or utilize hair-dryer or air channel wind to surface of the work, carries out MAG welding after organic solution volatilization.
Use machine solution for acetone or 1% hydroxyethyl cellulose solution, activating agent coating width 20mm at least larger than weld width, 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 pipe mill hardness; Stainless steel applies after activating agent of the present invention carries out 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 fine uniform more; The use of activating agent can improve the impact property of welding point.
Embodiment three
Welding step in the present embodiment: the first step: carry out activating agent batching by weight ratio and make the activating agent welded for stainless steel MAG, wherein: its composition distributes by weight percentage, is respectively Cr
2o
3: 43%, MgO:22%, TiO
2: 33%, MgCO
3: 2%.Mix with organic solution after fully mixing, stir into pasty state;
Second step: carefully polished by mother metal stainless steel wire brush, until the metal exposing light, with acetone wiping surface of the work to remove surface and oil contaminant;
3rd step: the pasty state activating agent prepared in the first step is coated in welding work pieces surface, is advisable to cover original metallic luster;
4th step: natural air drying or utilize hair-dryer or air channel wind to surface of the work, carries out MAG welding after organic solution volatilization.
Use machine solution for acetone or 1% hydroxyethyl cellulose solution, activating agent coating width 20mm at least larger than weld width, 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 pipe mill hardness; Stainless steel applies after activating agent of the present invention carries out 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 fine uniform more; The use of activating agent can improve the impact property of welding point.
Embodiment four
Welding step in the present embodiment: the first step: carry out activating agent batching by weight ratio and make the activating agent welded for stainless steel MAG, wherein: its composition distributes by weight percentage, is respectively Cr
2o
3: 40%, MgO:20%, TiO
2: 34%, MgCO
3: 6%.Mix with organic solution after fully mixing, stir into pasty state;
Second step: carefully polished by mother metal stainless steel wire brush, until the metal exposing light, with acetone wiping surface of the work to remove surface and oil contaminant;
3rd step: the pasty state activating agent prepared in the first step is coated in welding work pieces surface, is advisable to cover original metallic luster;
4th step: natural air drying or utilize hair-dryer or air channel wind to surface of the work, carries out MAG welding after organic solution volatilization.
Use machine solution for acetone or 1% hydroxyethyl cellulose solution, activating agent coating width 20mm at least larger than weld width, 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 pipe mill hardness; Stainless steel applies after activating agent of the present invention carries out 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 fine uniform more; 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 activating agent batching by weight ratio and make the activating agent welded for stainless steel MAG, wherein: its composition distributes by weight percentage, is respectively Cr
2o
3: 40%, MgO:25%, TiO
2: 35%.Mix with organic solution after fully mixing, stir into pasty state;
Second step: carefully polished by mother metal stainless steel wire brush, until the metal exposing light, with acetone wiping surface of the work to remove surface and oil contaminant;
3rd step: the pasty state activating agent prepared in the first step is coated in welding work pieces surface, is advisable to cover original metallic luster;
4th step: natural air drying or utilize hair-dryer or air channel wind to surface of the work, carries out MAG welding after organic solution volatilization.
Use machine solution for acetone or 1% hydroxyethyl cellulose solution, activating agent coating width 20mm at least larger than weld width, 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 pipe mill hardness; Stainless steel applies after activating agent of the present invention carries out 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 fine uniform more; 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 activating agent batching by weight ratio and make the activating agent welded for stainless steel MAG, wherein: its composition distributes by weight percentage, is respectively Cr
2o
3: 41%, MgO:24%, TiO
2: 30%, MgCO
3: 5%.Mix with organic solution after fully mixing, stir into pasty state;
Second step: carefully polished by mother metal stainless steel wire brush, until the metal exposing light, with acetone wiping surface of the work to remove surface and oil contaminant;
3rd step: the pasty state activating agent prepared in the first step is coated in welding work pieces surface, is advisable to cover original metallic luster;
4th step: natural air drying or utilize hair-dryer or air channel wind to surface of the work, carries out MAG welding after organic solution volatilization.
Use machine solution for acetone or 1% hydroxyethyl cellulose solution, activating agent coating width 20mm at least larger than weld width, 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 pipe mill hardness; Stainless steel applies after activating agent of the present invention carries out 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 fine uniform more; 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 activating agent batching by weight ratio and make the activating agent welded for stainless steel MAG, wherein: its composition distributes by weight percentage, is respectively Cr
2o
3: 45%, MgO:21%, TiO
2: 34%.Mix with organic solution after fully mixing, stir into pasty state;
Second step: carefully polished by mother metal stainless steel wire brush, until the metal exposing light, with acetone wiping surface of the work to remove surface and oil contaminant;
3rd step: the pasty state activating agent prepared in the first step is coated in welding work pieces surface, is advisable to cover original metallic luster;
4th step: natural air drying or utilize hair-dryer or air channel wind to surface of the work, carries out MAG welding after organic solution volatilization.
Use machine solution for acetone or 1% hydroxyethyl cellulose solution, activating agent coating width 20mm at least larger than weld width, 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 pipe mill hardness; Stainless steel applies after activating agent of the present invention carries out 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 fine uniform more; 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 stainless steel MAG weld an activating agent, it is characterized in that: described activating agent by granularity be 10 ~ 80 μm, purity be 95% ~ 99% Cr
2o
3,mgO, TiO
2and MgCO
3powder particle mixture forms, and its composition distributes by weight percentage and is respectively Cr
2o
3: 40% ~ 45%, MgO:20% ~ 25%, TiO
2: 30% ~ 35%, MgCO
3: 1% ~ 10%.
2. a kind of activating agent welded for stainless steel MAG according to claim 1, is characterized in that: Cr in described activating agent
2o
3, MgO, TiO
2and MgCO
3powder particle forms, and its composition distributes by weight percentage, is respectively Cr
2o
3: 43% ~ 45%, MgO:20% ~ 24%, TiO
2: 31% ~ 34%, MgCO
3: 1% ~ 5%.
3. a kind of activating agent welded for stainless steel MAG according to claim 2, is characterized in that: Cr in described activating agent
2o
3, MgO, TiO
2and MgCO
3powder particle forms, and its composition distributes by weight percentage, is respectively Cr
2o
3: 43% ~ 45%, MgO:21% ~ 23%, TiO
2: 31% ~ 34%, MgCO
3: 1% ~ 5%.
4. a kind of activating agent welded for stainless steel MAG according to claim 3, is characterized in that: Cr in described activating agent
2o
3, MgO, TiO
2and MgCO
3powder particle forms, and 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 welded for stainless steel MAG according to claim 3, is characterized in that: Cr in described activating agent
2o
3, MgO, TiO
2and MgCO
3powder particle forms, and 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 welded for stainless steel MAG according to claim 3, is characterized in that: Cr in described activating agent
2o
3, MgO, TiO
2and MgCO
3powder particle forms, and 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 activating agent batching by weight ratio and make the activating agent welded for stainless steel MAG, mix with organic solution after fully mixing, stir into pasty state;
Second step: carefully polished by mother metal stainless steel wire brush, until the metal exposing light, with acetone wiping surface of the work to remove surface and oil contaminant;
3rd step: the pasty state activating agent prepared in the first step is coated in welding work pieces surface, is advisable to cover original metallic luster;
4th step: natural air drying or utilize hair-dryer or air channel wind to surface of the work, carries out MAG welding after organic solution volatilization.
8. the using method of the activating agent for stainless steel MAG welding according to claim 7, it is characterized in that, described organic solution is the hydroxyethyl 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 20mm at least larger than weld width.
10. the using method of the activating agent for stainless steel MAG welding according to claim 7, it is characterized in that, described activating agent coated weight is 5-7mg/cm
2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| CN104551406B (en) * | 2014-12-23 | 2016-08-24 | 中车青岛四方机车车辆股份有限公司 | Rail vehicle curb girder strengthens activity laser MAG complex welding method |
| CN109570710B (en) * | 2018-12-11 | 2020-11-24 | 南京工程学院 | Active agent for low-carbon steel high-speed MAG welding and use method |
| CN116352233B (en) * | 2023-05-30 | 2023-08-22 | 中镱新材料智能制造研究院(山西)有限公司 | Manufacturing method for fused accumulation additive of ejection type ceramic particle reinforced composite material |
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| FR2905293B1 (en) * | 2006-09-06 | 2008-11-07 | Air Liquide | WIRE, FLUX AND PROCESS FOR WELDING HIGH-NICKEL STEEL |
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