CN108994477B - Welding line non-oxidation color ferrite stainless steel flux-cored wire and preparation method thereof - Google Patents
Welding line non-oxidation color ferrite stainless steel flux-cored wire and preparation method thereof Download PDFInfo
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- CN108994477B CN108994477B CN201811057753.0A CN201811057753A CN108994477B CN 108994477 B CN108994477 B CN 108994477B CN 201811057753 A CN201811057753 A CN 201811057753A CN 108994477 B CN108994477 B CN 108994477B
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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
- B23K35/02—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape
- B23K35/0255—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape for use in welding
- B23K35/0261—Rods, electrodes, wires
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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
- B23K35/24—Selection of soldering or welding materials proper
- B23K35/30—Selection of soldering or welding materials proper with the principal constituent melting at less than 1550 degrees C
- B23K35/3053—Fe as the principal constituent
- B23K35/308—Fe as the principal constituent with Cr as next major constituent
- B23K35/3086—Fe as the principal constituent with Cr as next major constituent containing Ni or Mn
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/16—Arc welding or cutting making use of shielding gas
Abstract
The invention belongs to the field of welding materials, particularly relates to a welding wire, and particularly relates to a welding wire with a non-oxidation color ferrite stainless steel coating and a preparation method thereof. The welding wire consists of a welding core and a coating, wherein the coating wraps the welding wire, and the coating is bonded around the welding core by an adhesive; the preparation method specifically comprises the following steps: (1) preparing an adhesive, mixing and granulating (2), mixing a coating, preparing a core wire (4), coating the coating and the periphery of the welding wire, and baking to obtain the welding wire. According to the welding line non-oxidation color ferrite stainless steel flux-coated welding wire, a compact protective layer can be formed after the welding wire is cladded on stainless steel, the combination of oxygen and metal components in alloy is prevented, the white surface of the welding line is still silvery white, the oxidation resistance is excellent, and the subsequent oxidation color removal treatment is not needed on the surface of the welded welding line; the production process is simple, the cost is low, the efficiency is high, and continuous and large-scale production can be realized.
Description
Technical Field
The invention belongs to the field of welding materials, particularly relates to a welding wire, and particularly relates to a welding wire with a non-oxidation color ferrite stainless steel coating and a preparation method thereof.
Background
At present, China is in a rapid development period, and the steel industry is also in the spring of development. Stainless steel is used as a new material in the steel industry, and is widely applied to petroleum, chemical industry, light industry, food, wine brewing, pharmacy, household appliances, hydroelectric appliances, machinery, buildings, municipal administration and various civil appliances. The strong trend of stainless steel in the industrial field inevitably drives the growth of stainless steel welding wires. The development of stainless steel welding materials has achieved important achievements so far, the yield of the stainless steel flux-cored wire is increased year by year, and the market demands for high-end products are increased more and more. Compared with the traditional manual welding rod, a copper-plated solid-core welding wire and a submerged arc welding flux, the stainless steel flux-cored welding wire has obvious advantages, firstly, the welding process is more continuous, and automatic welding can be realized, so that welding joints are reduced, the production efficiency is greatly improved, the welding quality is 3-4 times that of manual electric arc welding, the energy is saved, and the comprehensive cost is reduced; secondly, the stainless steel flux-cored wire does not generate heat and reddens, the splashing is extremely small, the welding line is bright and silvery white, and acid pickling, grinding and polishing are not needed after welding; thirdly, the powder in the flux-cored wire is baked at high temperature, the moisture is very little, the powder does not need to be dried before welding, and the air hole sensitivity is low. Therefore, the stainless steel flux-cored wire is widely applied to the industries of shipbuilding, petrifaction, pressure vessels, steel structures, engineering machinery and the like.
The high-end stainless steel flux-cored wire product has the characteristics of low smoke dust, low toxicity, attractive forming and pure color. At present, an austenitic stainless steel flux-cored wire with attractive weld joints is a main mark of a high-end stainless steel welding material after welding processing, and the stainless steel flux-cored wire not only has excellent welding technological properties, but also needs to meet the requirements of high-end products on the surface color of the weld joints. The corrosion resistance, the hot crack sensitivity, the embrittlement tendency, the air hole tendency and the like of the stainless steel flux-cored wire welding joint are favored, and the oxidation color generated on the surface of the welding seam after welding (namely the oxidation color resistance of the welding wire) is hardly researched. The surface of the weld joint of most austenitic stainless steel flux-cored wires is poor in oxidation resistance, the surface of the weld joint after welding is easy to have different oxidation colors distributed in a disordered way, the appearance is influenced, the weld joint is easy to corrode, the durability is obviously reduced, and the pickling passivation process is adopted, so that the environment is worsened, the time is consumed, and the cost is increased. The best weld surface is silvery white, worst a bluish black color, and severe weld oxidation also reduces corrosion resistance. Therefore, the development of the ferritic stainless steel flux-cored wire without the oxidation color of the welding line is of great significance.
Disclosure of Invention
The invention aims to solve the problems in the prior art and provides a welding line non-oxidation color ferrite stainless steel flux-cored wire for protecting carbon dioxide or mixed gas, which has excellent welding process performance and oxidation color resistance and attractive welding line forming. Under the condition that chemical components, mechanical properties and corrosion resistance of deposited metal of the welding wire meet requirements of relevant national standards, the surface color of a welded seam is silvery white, so that the requirement of a high-end flux-cored wire is met, the surface of the welded seam is prevented from being subjected to color removal treatment after welding, and the production efficiency of welding is further improved.
The invention also aims to provide a preparation method of the ferrite stainless steel flux-cored wire without the oxidation color of the welding line, which has simple process and low production cost and is suitable for industrial production.
In order to achieve the purpose, the invention adopts the following technical scheme:
a welding seam non-oxidation color ferrite stainless steel flux-coated welding wire comprises a core wire and a flux coating, wherein the flux coating wraps the welding wire, the flux coating is bonded around the core wire by an adhesive, and the flux-coated welding wire comprises the following components:
the adhesive comprises the following components: potassium water glass and sodium water glass are mixed according to the mass ratio of 1-3: 1, mixing; wherein the Baume degree of the potash water glass is 0.44-46, the modulus is 2.7-2.9, the mass percentage of the potassium oxide is 14-17%, the mass percentage of the silicon dioxide is 28.0-31.0%, and the balance is water; the baume degree of the sodium silicate is 0.44-0.46, the modulus is 2.2-2.5, wherein the mass percent of silicon dioxide is 25.7-26.0%, the mass percent of sodium oxide is 12.8-13%, and the balance is water;
the welding wire comprises the following components: the mass percentage of each chemical component is as follows: 0-0.04% of C, 0.5-1% of Si, 0.05-0.1% of Co, 5-8% of Tc, 2-6% of Zr, 0.5-1.0% of Mn, 15-20% of Cr, 0.2-0.3% of Ti, 5.5-6.5% of Ni, 0-0.015% of S, 0-0.02% of P and the balance of Fe and other inevitable impurity elements, wherein the sum of the mass percentages of the components is 100%;
the medicine skin comprises the following components: the mass percentage of each chemical component is as follows: 10-15% of arc stabilizer, 25-35% of slagging agent, 5-8% of ferrozirconium alloy, 15-20% of ferrochrome alloy, 15-20% of multi-element alloy powder and the balance of calcium carbonate.
Further, the mass ratio of the coating components to the adhesive is 100: 10-15 parts of; the diameter of the welding wire is 2-3.5 mm; the thickness of the coating is 1-3 mm.
Further, the arc stabilizer consists of K4O4Ti、Na2O and Na3AlF6The arc stabilizer consists of the components according to the mass ratio of 7-5:2-1:1, and the water content of the arc stabilizer is less than or equal to 400 ppm.
Further, the slagging agent comprises 45-55% of rutile, 10-20% of zircon sand and 20-45% of quartz by mass percent.
Furthermore, the multi-element alloy contains 5-10% of zinc, 39-43% of magnesium, 35-45% of aluminum, 5-15% of neodymium and 1-2% of tin.
Further, the preparation method of the welding line non-oxidation color ferrite stainless steel flux-coated welding wire specifically comprises the following steps:
(1) preparing a binding agent: weighing the adhesion agent components according to the mass ratio, and stirring and mixing uniformly for later use;
(2) dry-mixing rutile, zircon sand and quartz in a powder mixer, putting the mixture into a spray granulator, and granulating by using water as a binder, wherein the particle size of the granules is controlled to be 3-5 mm;
(3) mixing the coatings: mixing the raw materials with the mixed material obtained in the step (2) according to the mass ratio, wherein the purity of the raw materials is more than 99.9%; putting the raw materials into a vacuum induction furnace for smelting at the smelting temperature of 1550-; then, cooling the mother alloy liquid to obtain a strip, and grinding the obtained strip in a ball mill for 20-24 hours to obtain multi-component coating alloy powder; uniformly mixing alloy powder and the adhesive prepared in the step (1) to form coating material mud, wherein the weight ratio of coating components to the adhesive is 100: 10-15 parts of;
(4) preparing a core wire: the materials are mixed according to the mass ratio, and the purity of all the raw materials is more than 99.9%; smelting all the raw materials in an induction furnace, then casting into a columnar blank, and forming a welding wire by a hot drawing method;
(5) uniformly distributing the coating mud mixed in the step (2) along the length direction of the welding core and coating the coating mud on the welding wire; the thickness is controlled, and the weight ratio of the coating material mud to the welding wire is 1: 1.5-2; and airing the welding rod for 24 hours, and then baking the welding rod in an oven to obtain the non-oxidation color ferrite stainless steel flux-cored wire for the welding line.
Further, the grain size of the multicomponent coating alloy powder in the step (3) is 80-120 meshes.
Further, the smelting temperature in the step (4) is 1600-1610 ℃, the diameter of the columnar blank is 12-18mm, and the hot drawing temperature is 1365-1380 ℃.
Further, the baking temperature in the step (5) is 220-.
The invention has the following beneficial effects:
(1) according to the ferrite stainless steel flux-cored wire without oxidation colors for the welding line, a compact protective layer can be formed after the welding wire is cladded on stainless steel, the combination of oxygen and metal components in alloy is prevented, the white surface of the welding line is still silvery white, the oxidation resistance is excellent, and the subsequent oxidation color removal treatment is not needed on the surface of the welded welding line.
(2) According to the welding seam non-oxidation color ferrite stainless steel flux-cored wire, the adhesion agent is a composition of potassium water glass and sodium water glass, so that redness and cracking of the flux coating can be effectively inhibited, and the process stability is improved.
(3) According to the welding line non-oxidation color ferrite stainless steel flux-cored wire, sodium fluoroaluminate in the flux is used as a slag diluent to dilute slag so as to increase the activity of the flux-cored wire; ferrochromium alloy and ferrozirconium alloy are used as alloying agents to increase the strength of the welding seam; the multi-element alloy can crystallize alloy phase and is a good deoxidizer; the electric arc is stable during welding, the operation is easy, the welding seam is well formed, no oxidation color exists, and the slag removal is convenient.
(4) The ferrite stainless steel flux-coated welding wire without the oxidation color of the welding line has the advantages of simple production process, lower cost, high efficiency and continuous and large-scale production.
Detailed Description
The present invention will now be described in further detail with reference to examples.
Example 1
A welding seam non-oxidation color ferrite stainless steel flux-coated welding wire comprises a core wire and a flux coating, wherein the flux coating wraps the welding wire, the flux coating is bonded around the core wire by an adhesive, and the flux-coated welding wire comprises the following components:
the adhesive comprises the following components: potassium water glass and sodium water glass are mixed according to the mass ratio of 1:1, mixing; wherein the Baume degree of the potash water glass is 0.44, the modulus is 2.7, the mass percentage of potassium oxide is 14 percent, the mass percentage of silicon dioxide is 28.0 percent, and the balance is water; the baume degree of the sodium silicate is 0.44, the modulus is 2.2, wherein the mass percent of silicon dioxide is 25.7%, the mass percent of sodium oxide is 12.8%, and the balance is water;
the welding wire comprises the following components: the mass percentage of each chemical component is as follows: 0.04% of C, 0.5% of Si, 0.05% of Co, 5% of Tc, 2% of Zr, 1.0% of Mn, 15% of Cr, 0.3% of Ti, 5.5% of Ni, 0.015% of S, 0.02% of P, and the balance of Fe and other inevitable impurity elements, wherein the sum of the mass percentages of the components is 100%;
the medicine skin comprises the following components: the mass percentage of each chemical component is as follows: from K4O4Ti、Na2O and Na3AlF6The composite material consists of 12% of arc stabilizer, 30% of slagging agent, 5% of ferrozirconium, 20% of ferrochrome, 20% of multi-component alloy powder and the balance of calcium carbonate according to the mass ratio of 7:1:1, wherein the slagging agent comprises 45% of rutile, 20% of zircon sand and 35% of quartz according to the mass percentage, and the multi-component alloy contains 5% of zinc, 43% of magnesium, 45% of aluminum, 5% of neodymium and 2% of tin.
Further, the preparation method of the welding line non-oxidation color ferrite stainless steel flux-coated welding wire specifically comprises the following steps:
(1) preparing a binding agent: weighing the adhesion agent components according to the mass ratio, and stirring and mixing uniformly for later use;
(2) dry-mixing rutile, zircon sand and quartz in a powder mixer, putting the mixture into a spray granulator, and granulating by using water as a binder, wherein the particle size of the granules is controlled to be 3 mm;
(3) mixing the coatings: mixing the raw materials with the mixed material obtained in the step (2) according to the mass ratio, wherein the purity of the raw materials is more than 99.9%; putting the raw materials into a vacuum induction furnace for smelting at 1550 ℃ to obtain mother alloy liquid; then, cooling the mother alloy liquid to obtain a strip, and grinding the obtained strip in a ball mill for 24 hours to obtain multi-element coating alloy powder with the particle size of 80 meshes; uniformly mixing alloy powder and the adhesive prepared in the step (1) to form coating material mud, wherein the weight ratio of coating components to the adhesive is 100: 10;
(4) preparing a core wire: the materials are mixed according to the mass ratio, and the purity of all the raw materials is more than 99.9%; smelting the raw materials in an induction furnace at 1600 ℃, then casting the raw materials into a columnar blank with the diameter of 18mm, and forming a welding wire by a hot drawing method at 1365 ℃;
(5) uniformly distributing the coating mud mixed in the step (2) along the length direction of the welding core and coating the coating mud on the welding wire; the thickness is controlled, and the weight ratio of the coating material mud to the welding wire is 1: 1.5; airing the welding rod for 24 hours, and then putting the welding rod into an oven to be baked for 5 hours at the temperature of 220 ℃ to obtain the welding rod with the diameter of 2 mm; the thickness of the coating is 1mm, and the welding line has no oxide color ferrite stainless steel coating welding wire.
Example 2
A welding seam non-oxidation color ferrite stainless steel flux-coated welding wire comprises a core wire and a flux coating, wherein the flux coating wraps the welding wire, the flux coating is bonded around the core wire by an adhesive, and the flux-coated welding wire comprises the following components:
the adhesive comprises the following components: potassium water glass and sodium water glass are mixed according to the mass ratio of 2:1, mixing; wherein the Baume degree of the potash water glass is 45, the modulus is 2.8, the mass percentage of potassium oxide is 15 percent, the mass percentage of silicon dioxide is 30 percent, and the balance is water; the baume degree of the sodium silicate is 0.45, the modulus is 2.4, wherein the mass percent of silicon dioxide is 25.9%, the mass percent of sodium oxide is 12.9%, and the balance is water;
the welding wire comprises the following components: the mass percentage of each chemical component is as follows: 0.03 percent of C, 0.8 percent of Si, 0.08 percent of Co, 6 percent of Tc, 4 percent of Zr, 0.8 percent of Mn, 18 percent of Cr, 0.25 percent of Ti, 6.0 percent of Ni, 0.010 percent of S, 0.01 percent of P, and the balance of Fe and other inevitable impurity elements, wherein the sum of the mass percentages of all the components is 100 percent;
the medicine skin comprises the following components: the mass percentage of each chemical component is as follows: from K4O4Ti、Na2O and Na3AlF6The slag-forming agent comprises, by mass, 55% of rutile, 10% of zircon sand and 35% of quartz according to mass percentage, 10% of zinc, 39% of magnesium, 45% of aluminum, 5% of neodymium and 1% of tin, and consists of 10% of an arc stabilizer, 25% of a slag former, 7% of a ferrozirconium alloy, 15% of a ferrochromium alloy, 15% of a multi-component alloy powder and the balance of calcium carbonate according to a mass ratio of 6:2: 1.
Further, the preparation method of the welding line non-oxidation color ferrite stainless steel flux-coated welding wire specifically comprises the following steps:
(1) preparing a binding agent: weighing the adhesion agent components according to the mass ratio, and stirring and mixing uniformly for later use;
(2) dry-mixing rutile, zircon sand and quartz in a powder mixer, putting the mixture into a spray granulator, and granulating by using water as a binder, wherein the particle size of the granules is controlled to be 4 mm;
(3) mixing the coatings: mixing the raw materials with the mixed material obtained in the step (2) according to the mass ratio, wherein the purity of the raw materials is more than 99.9%; putting the raw materials into a vacuum induction furnace for smelting at 1560 ℃ to obtain mother alloy liquid; then, cooling the mother alloy liquid to obtain a strip, and putting the strip into a ball mill to grind for 22 hours to obtain multi-element coating alloy powder with the particle size of 100 meshes; uniformly mixing alloy powder and the adhesive prepared in the step (1) to form coating material mud, wherein the weight ratio of coating components to the adhesive is 100: 12;
(4) preparing a core wire: the materials are mixed according to the mass ratio, and the purity of all the raw materials is more than 99.9%; smelting the raw materials in an induction furnace at 1605 ℃, then casting into a columnar blank with the diameter of 14mm, and forming a welding wire by a hot drawing method at 1370 ℃;
(5) uniformly distributing the coating mud mixed in the step (2) along the length direction of the welding core and coating the coating mud on the welding wire; the thickness is controlled, and the weight ratio of the coating material mud to the welding wire is 1: 1.8; airing the welding rod for 24 hours, and then putting the welding rod into an oven to be baked for 4 hours at the temperature of 230 ℃ to obtain the welding rod with the diameter of 3 mm; the thickness of the coating is 2mm, and the welding line is a non-oxidation color ferrite stainless steel coating welding wire.
Example 3
A welding seam non-oxidation color ferrite stainless steel flux-coated welding wire comprises a core wire and a flux coating, wherein the flux coating wraps the welding wire, the flux coating is bonded around the core wire by an adhesive, and the flux-coated welding wire comprises the following components:
the adhesive comprises the following components: potassium water glass and sodium water glass are mixed according to the mass ratio of 3: 1, mixing; wherein the Baume degree of the potash water glass is 0.46, the modulus is 2.9, the mass percentage of potassium oxide is 17 percent, the mass percentage of silicon dioxide is 31.0 percent, and the balance is water; the baume degree of the sodium silicate is 0.46, the modulus is 2.5, wherein the mass percent of silicon dioxide is 26.0%, the mass percent of sodium oxide is 13%, and the balance is water;
the welding wire comprises the following components: the mass percentage of each chemical component is as follows: 0.02% of C, 1% of Si, 0.1% of Co, 8% of Tc, 2-6% of Zr, 1.0% of Mn, 20% of Cr, 0.3% of Ti, 6.5% of Ni, 0.005% of S, 0.01% of P, and the balance of Fe and other inevitable impurity elements, wherein the sum of the mass percentages of the components is 100%;
the medicine skin comprises the following components: the mass percentage of each chemical component is as follows: from K4O4Ti、Na2O and Na3AlF6The slag-forming agent comprises, by mass, 15% of an arc stabilizer, 35% of a slagging agent, 8% of a ferrozirconium alloy, 18% of a ferrochrome alloy, 15% of a multi-element alloy powder and the balance of calcium carbonate according to a mass ratio of 5:1:1, wherein the slagging agent comprises, by mass, 50% of rutile, 20% of zircon sand and 30% of quartz, and the multi-element alloy contains, by mass, 10% of zinc, 39% of magnesium, 40% of aluminum, 10% of neodymium and 1% of tin.
Further, the preparation method of the welding line non-oxidation color ferrite stainless steel flux-coated welding wire specifically comprises the following steps:
(1) preparing a binding agent: weighing the adhesion agent components according to the mass ratio, and stirring and mixing uniformly for later use;
(2) dry-mixing rutile, zircon sand and quartz in a powder mixer, putting the mixture into a spray granulator, and granulating by using water as a binder, wherein the particle size of the granules is controlled to be 5 mm;
(3) mixing the coatings: mixing the raw materials with the mixed material obtained in the step (2) according to the mass ratio, wherein the purity of the raw materials is more than 99.9%; putting the raw materials into a vacuum induction furnace for smelting at 1580 ℃ to obtain mother alloy liquid; then, cooling the mother alloy liquid to obtain a strip, and grinding the obtained strip in a ball mill for 24 hours to obtain multi-component coating alloy powder with the particle size of 120 meshes; uniformly mixing alloy powder and the adhesive prepared in the step (1) to form coating material mud, wherein the weight ratio of coating components to the adhesive is 100: 15;
(4) preparing a core wire: the materials are mixed according to the mass ratio, and the purity of all the raw materials is more than 99.9%; smelting the raw materials in an induction furnace at the temperature of 1610 ℃, then casting the raw materials into a columnar blank with the diameter of 18mm, and forming a welding wire by a hot drawing method at the temperature of 1380 ℃;
(5) uniformly distributing the coating mud mixed in the step (2) along the length direction of the welding core and coating the coating mud on the welding wire; the thickness is controlled, and the weight ratio of the coating material mud to the welding wire is 1: 2; airing the welding rod for 24 hours, and then putting the welding rod into an oven to be baked for 3 hours at the temperature of 250 ℃ to obtain the welding rod with the diameter of 3.5 mm; the thickness of the coating is 3mm, and the welding line is a non-oxidation color ferrite stainless steel coating welding wire.
Example 4
A welding seam non-oxidation color ferrite stainless steel flux-coated welding wire comprises a core wire and a flux coating, wherein the flux coating wraps the welding wire, the flux coating is bonded around the core wire by an adhesive, and the flux-coated welding wire comprises the following components:
the adhesive comprises the following components: potassium water glass and sodium water glass are mixed according to the mass ratio of 2:1, mixing; wherein the Baume degree of the potash water glass is 0.44, the modulus is 2.8, the mass percentage of the potassium oxide is 15 percent, the mass percentage of the silicon dioxide is 28.0 percent, and the balance is water; the baume degree of the sodium silicate is 0.44, the modulus is 2.5, wherein the mass percent of silicon dioxide is 26.0%, the mass percent of sodium oxide is 13%, and the balance is water;
the welding wire comprises the following components: the mass percentage of each chemical component is as follows: 0.01 percent of C, 0.8 percent of Si, 0.05 percent of Co, 5 percent of Tc, 6 percent of Zr, 1.0 percent of Mn, 15 percent of Cr, 0.3 percent of Ti, 6.5 percent of Ni, 0.015 percent of S, and the balance of Fe and other inevitable impurity elements, wherein the sum of the mass percent of the components is 100 percent;
the medicine skin comprises the following components: the mass percentage of each chemical component is as follows: from K4O4Ti、Na2O and Na3AlF6The slag-forming agent comprises, by mass, 10% of an arc stabilizer, 35% of a slagging agent, 8% of a ferrozirconium alloy, 15% of a ferrochrome alloy, 18% of a multi-element alloy powder and the balance of calcium carbonate according to a mass ratio of 6:1:1, wherein the slagging agent comprises, by mass, 45% of rutile, 20% of zircon sand and 35% of quartz, and the multi-element alloy comprises, by mass, 5% of zinc, 43% of magnesium, 35% of aluminum, 15% of neodymium and 2% of tin.
Further, the preparation method of the welding line non-oxidation color ferrite stainless steel flux-coated welding wire specifically comprises the following steps:
(1) preparing a binding agent: weighing the adhesion agent components according to the mass ratio, and stirring and mixing uniformly for later use;
(2) dry-mixing rutile, zircon sand and quartz in a powder mixer, putting the mixture into a spray granulator, and granulating by using water as a binder, wherein the particle size of the granules is controlled to be 3 mm;
(3) mixing the coatings: mixing the raw materials with the mixed material obtained in the step (2) according to the mass ratio, wherein the purity of the raw materials is more than 99.9%; putting the raw materials into a vacuum induction furnace for smelting at 1570 ℃ to obtain mother alloy liquid; then, cooling the mother alloy liquid to obtain a strip, and grinding the obtained strip in a ball mill for 24 hours to obtain multi-element coating alloy powder with the particle size of 100 meshes; uniformly mixing alloy powder and the adhesive prepared in the step (1) to form coating material mud, wherein the weight ratio of coating components to the adhesive is 100: 12;
(4) preparing a core wire: the materials are mixed according to the mass ratio, and the purity of all the raw materials is more than 99.9%; smelting the raw materials in an induction furnace at 1600 ℃, then casting the raw materials into a cylindrical blank with the diameter of 18mm, and forming a welding wire by a 1365-1380 ℃ hot drawing method;
(5) uniformly distributing the coating mud mixed in the step (2) along the length direction of the welding core and coating the coating mud on the welding wire; the thickness is controlled, and the weight ratio of the coating material mud to the welding wire is 1: 1.5; airing the welding rod for 24 hours, and then putting the welding rod into an oven to be baked for 4 hours at the temperature of 220 ℃ to obtain the welding rod with the diameter of 3 mm; the thickness of the coating is 1mm, and the welding line has no oxide color ferrite stainless steel coating welding wire.
And (3) performance testing:
using the welding wires obtained in examples 1 to 4 and commercially available welding wires a and B of the same type, welding operations were performed to evaluate arc stability, slag removability, and bead shape at the upward vertical position. Further, as weld metal properties, tensile strength, toughness, flaw resistance, high temperature crack resistance, and corrosion resistance were evaluated.
The welding workability was evaluated by fillet welding in the upward vertical welding. Specifically, the welding was performed with a welding current (180-200A) and an arc voltage (28-30V) using 80% argon-20% carbon dioxide as a shielding gas, and the welding workability was evaluated.
Tensile strength and toughness of the weld metal were evaluated by AWS B4.0 test.
The weld metal was evaluated for flaw resistance by performing an RT test of AWS A5.11.
The weld metal was evaluated for high-temperature cracking resistance by performing a FISCO cracking test, performing a penetration flaw detection test on the surface of the weld bead immediately after welding, and examining the presence or absence of cracking.
The corrosion resistance of the weld metal was evaluated by the SATM G48C method.
The evaluation criteria are as follows:
arc stability criteria are as follows:
regarding arc stability, it is extremely good that droplets are small and spatter little for spray transition (□), that droplets close to spray transition are good for spray transition with comparatively little spatter (good), that droplets are coarse for spray transition, and that droplets are large and generate a large amount of spatter is poor (x).
Slag peelability criteria:
regarding the slag removability, the slag removability was extremely good (□), the slag removability was good (good quality) by tapping gently with a hammer, and the slag removability by hot sticking to the bead surface was poor (x).
Bead shape at the upward vertical position:
with respect to the bead shape at the upward vertical position, the bead shape satisfying the criterion for the fillet of AWS a5.34 is extremely good (□), the bead shape satisfying the criterion for the fillet of a5.34 is good (good), and the bead shape satisfying the criterion for the fillet of a5.34 is poor (x).
Standard of tensile strength:
the tensile strength was found to be extremely good (□) at 700MPa or more, good (good) at 650-700MPa, and poor (x) at less than 650 MPa.
And (3) toughness standard:
as regards toughness, it is evaluated in a pendulum impact test at-196 ℃. The absorption energy was good (good) at 50J or more, and poor (x) at less than 50J.
Defect resistance criteria:
regarding the defect resistance, the ones satisfying the acceptance criterion of the RT test of AWS a5.11 were good (good), and the ones not satisfying the acceptance criterion of the RT test of AWSA5.11 were poor (x).
High temperature cracking resistance standard:
the high temperature cracking resistance was evaluated by the FISO cracking test. When the test was carried out at a welding current of 200A and a welding speed of 400mm/min, the test was good (good quality) with no crack, and the test was poor (x) with crack.
Standard of corrosion resistance:
with respect to the corrosion resistance, in ASTM G48C method, a good (good) CPT of 55 ℃ or higher and a poor (X) CPT of 55 ℃ or lower are given.
And (3) welding seam color standard:
it was observed as a weld color, silvery white (□), light brown (good quality), and dark (x).
Overall evaluation was that all of the welding workability was □, and all of the weld metal properties were good √ as either one or more of the welding workability was good, and all of the weld metal properties were good, and of the welding workability and the weld metal properties, x was x, and these results are shown in table 2.
Table 2:
as can be seen from the test results in Table 2, examples 1-4 satisfying the scope of the present invention have good welding operability, easy operation, good weld metal properties, silvery white weld color, excellent oxidation resistance, no need of subsequent deoxidation treatment on the welded weld surface, and comprehensive evaluation of properties superior to those of the same type products A and B on the market.
In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (8)
1. The utility model provides a welding seam does not have oxidation color ferrite stainless steel coating welding wire, comprises core wire and coating, and the coating parcel core wire, adhesion agent bond the coating around the core wire its characterized in that: the flux-cored wire comprises the following components:
the adhesive comprises the following components: potassium water glass and sodium water glass are mixed according to the mass ratio of 1-3: 1, mixing; wherein the Baume degree of the potash water glass is 0.44-0.46, the modulus is 2.7-2.9, the mass percentage of the potassium oxide is 14-17%, the mass percentage of the silicon dioxide is 28.0-31.0%, and the balance is water; the baume degree of the sodium silicate is 0.44-0.46, the modulus is 2.2-2.5, wherein the mass percent of silicon dioxide is 25.7-26.0%, the mass percent of sodium oxide is 12.8-13%, and the balance is water;
the components of the welding core are as follows: the mass percentage of each chemical component is as follows: 0 to 0.04 percent of C, 0.5 to 1 percent of Si, 0.05 to 0.1 percent of Co, 5 to 8 percent of Tc, 2 to 6 percent of Zr, 0.5 to 1.0 percent of Mn, 15 to 20 percent of Cr, 0.2 to 0.3 percent of Ti, 5.5 to 6.5 percent of Ni, 0 to 0.015 percent of S, 0 to 0.02 percent of P, and the balance of Fe and other inevitable impurity elements, wherein the sum of the mass percentages of the components is 100 percent;
the medicine skin comprises the following components: the mass percentage of each chemical component is as follows: 10-15% of arc stabilizer, 25-35% of slagging agent, 5-8% of ferrozirconium alloy, 15-20% of ferrochrome alloy, 15-20% of multi-element alloy powder and the balance of calcium carbonate;
the multi-element alloy contains 5-10% of zinc, 39-43% of magnesium, 35-45% of aluminum, 5-15% of neodymium and 1-2% of tin.
2. The welding wire of claim 1, wherein the weld joint is free of oxide colored ferritic stainless steel flux coating welding wire, and the welding wire comprises: the mass ratio of the coating components to the adhesive is 100: 10-15 parts of; the diameter of the welding core is 2-3.5 mm; the thickness of the coating is 1-3 mm.
3. A process as claimed in claim 1The welding seam non-oxidation color ferrite stainless steel flux-coated welding wire is characterized in that: the arc stabilizer consists of K4O4Ti、Na2O and Na3AlF6The arc stabilizer consists of the components according to the mass ratio of 7-5:2-1:1, and the water content of the arc stabilizer is less than or equal to 400 ppm.
4. The welding wire of claim 1, wherein the weld joint is free of oxide colored ferritic stainless steel flux coating welding wire, and the welding wire comprises: the slag former comprises 45-55% of rutile, 10-20% of zircon sand and 20-45% of quartz by mass percentage.
5. A method for preparing the welding line non-oxidized ferritic stainless steel flux-coated welding wire of any claim 1-4, which is characterized in that: the method specifically comprises the following steps:
(1) preparing a binding agent: weighing the adhesion agent components according to the mass ratio, and stirring and mixing uniformly for later use;
(2) dry-mixing rutile, zircon sand and quartz in a powder mixer, putting the mixture into a spray granulator, and granulating by using water as a binder, wherein the particle size of the granules is controlled to be 3-5 mm;
(3) mixing the coatings: mixing the raw materials with the mixed material obtained in the step (2) according to the mass ratio, wherein the purity of the raw materials is more than 99.9%; putting the raw materials into a vacuum induction furnace for smelting at the smelting temperature of 1550-; then, cooling the mother alloy liquid to obtain a strip, and grinding the obtained strip in a ball mill for 20-24 hours to obtain multi-component coating alloy powder; uniformly mixing alloy powder and the adhesive prepared in the step (1) to form coating material mud, wherein the weight ratio of coating components to the adhesive is 100: 10-15 parts of;
(4) preparing a core wire: the materials are mixed according to the mass ratio, and the purity of all the raw materials is more than 99.9%; smelting all the raw materials in an induction furnace, then casting into a columnar blank, and forming a welding core by a hot drawing method;
(5) uniformly distributing and coating the coating mud mixed in the step (2) on the welding core along the length direction of the welding core; the thickness is controlled, and the weight ratio of the coating material mud to the welding core is 1: 1.5-2; and airing for 24 hours, and then putting the welding wire into an oven for baking to obtain the non-oxidation color ferrite stainless steel flux-cored wire for the welding line.
6. The method for preparing the welding line non-oxidation color ferritic stainless steel flux-cored wire of claim 5, characterized in that: the grain diameter of the multicomponent coating alloy powder in the step (3) is 80-120 meshes.
7. The method for preparing the welding line non-oxidation color ferritic stainless steel flux-cored wire of claim 5, characterized in that: in the step (4), the smelting temperature is 1600-1610 ℃, the diameter of the columnar blank is 12-18mm, and the hot drawing temperature is 1365-1380 ℃.
8. The method for preparing the welding line non-oxidation color ferritic stainless steel flux-cored wire of claim 5, characterized in that: the baking temperature in the step (5) is 220-250 ℃, and the baking time is 3-5 h.
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