CN110682027B - Electric welding rod with seamless welding core for high-manganese austenite low-temperature steel and preparation method - Google Patents
Electric welding rod with seamless welding core for high-manganese austenite low-temperature steel and preparation method Download PDFInfo
- Publication number
- CN110682027B CN110682027B CN201910877603.2A CN201910877603A CN110682027B CN 110682027 B CN110682027 B CN 110682027B CN 201910877603 A CN201910877603 A CN 201910877603A CN 110682027 B CN110682027 B CN 110682027B
- Authority
- CN
- China
- Prior art keywords
- equal
- core
- powder
- less
- welding
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
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
- B23K35/02—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
- B23K35/0266—Rods, electrodes, wires flux-cored
-
- 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
- B23K35/3026—Mn as the principal constituent
-
- 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
- B23K35/40—Making wire or rods for soldering or welding
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Nonmetallic Welding Materials (AREA)
Abstract
The electric welding rod for the high manganese austenite low temperature steel with the seamless welding core and the preparation method thereof are characterized in that the components in the flux core are weighed according to the weight ratio: 90-96% of metal manganese powder, 1-3% of graphite, 1-3% of potassium carbonate, 0-2% of potassium titanate and the balance of reduced iron powder, baking the potassium carbonate and the potassium titanate at high temperature to remove water, mixing the potassium carbonate and the potassium titanate with other components in the drug core, and keeping the temperature to prepare drug core powder; weighing the components in the medicinal skin: 27-33% of marble, 4-11% of barium carbonate, 20-24% of fluorite, 1-3% of rutile, 3-7% of aluminum oxide, 1-3% of quartz, 1-3% of dehydrated mica, 1-2% of CMC, 7-12% of 45# ferrosilicon, 3-8% of metallic nickel powder, 5-10% of metallic chromium powder, 3-8% of metallic molybdenum powder and 0-1% of chromium iron nitride, uniformly mixing and stirring to obtain dry powder, and then adding sodium silicate into the dry powder for mixing and stirring; pressing the low-carbon steel strip surface into a U shape, adding flux-cored powder to prepare a flux-cored wire blank, drawing and reducing to prepare a seamless welding core, and preparing the seamless welding core and the flux-cored wire into an electric welding rod; the welding rod prepared by the invention has the advantages of small resistance, good welding process, stable electric arc, easy slag removal, no air hole, moisture absorption resistance and good low-temperature toughness.
Description
Technical Field
The invention relates to the technical field of welding materials, in particular to an electric welding rod with a seamless welding core for high-manganese austenite low-temperature steel and a preparation method thereof, and is suitable for welding a natural gas storage tank of the high-manganese austenite low-temperature steel.
Background
With the rapid development of global economy and the environmental protection emphasis of various countries, the demand of natural gas (LNG) is increasing day by day, China is a country with large energy consumption, and with the development of the economic society of China, the contradiction between supply and demand in the energy field is increasingly prominent. In order to promote the cooperation of energy and mineral resources of China and related countries, guarantee the national energy safety and maintain the domestic shipowner benefit, the scale of the self-built LNG fleet is urgently enlarged. The low-temperature material of the LNG storage tank for the ship is one of core technologies for constructing the LNG ship, the traditional LNG storage tank construction materials comprise austenitic stainless steel, nickel-based alloy, aluminum alloy, 9Ni steel and the like, wherein the 9Ni steel has the widest application range, but the price is high, and the construction cost of the LNG storage tank is high. The high manganese austenite low temperature steel has excellent low temperature performance and low price, can greatly reduce the construction cost of the LNG storage tank, and develops the application of the high manganese austenite low temperature steel for various countries.
The Korea pump company firstly successfully develops the novel high-manganese austenitic low-temperature steel for the LNG storage tank, domestic Dangyang steel Limited liability company and Nanjing steel member company successively develop the high-manganese austenitic steel with good low-temperature performance, and meanwhile, the research on the matched high-manganese austenitic low-temperature steel welding material is also scheduled by various research organizations, wherein the manual welding electrode is suitable for all-position welding and plays an important role in the construction of the LNG storage tank. At present, the high manganese steel welding rod is also researched, but the adopted welding core is a smelted alloy steel solid welding core, the resistance is high, and the welding rod is easy to turn red and the coating falls off in the using process, so that the welding manufacturability is poor and the utilization rate of the welding rod is low; or the used welding core is a low-carbon steel welding core, the alloy is mainly transited into the welding line through a coating, and the welding core is applied to cast steel with the manganese content of 11-14 wt% as a base material; aiming at the situation, the invention provides an electric welding rod with a seamless welding core for high-manganese austenitic low-temperature steel and a preparation method thereof.
Disclosure of Invention
The invention aims to solve the technical problems and provides an electric welding rod with a seamless welding core for high-manganese austenitic low-temperature steel and a preparation method thereof.
The technical scheme adopted by the invention for solving the defects of the technical problems is as follows: the electric welding rod with the seamless welding core for the high-manganese austenitic low-temperature steel comprises a welding core and a coating, wherein the welding core comprises a flux core and a coating, the flux core accounts for 34-35% of the total weight of the welding core, and the flux core comprises the following components in percentage by weight: 90-96% of metal manganese powder, 1-3% of graphite, 1-3% of potassium carbonate, 0-2% of potassium titanate and the balance of reduced iron powder;
the coating comprises the following components in percentage by weight: 27-33% of marble, 4-11% of barium carbonate, 20-24% of fluorite, 1-3% of rutile, 3-7% of aluminum oxide, 1-3% of quartz, 1-3% of dehydrated mica, 1-2% of CMC, 7-12% of 45# ferrosilicon, 3-8% of metallic nickel powder, 5-10% of metallic chromium powder, 3-8% of metallic molybdenum powder and 0-1% of chromium nitride.
Preferably, the skin is a low-carbon steel strip, and the low-carbon steel strip comprises the following chemical components in percentage by mass: 0.1-0.4% of Mn, less than or equal to 0.10% of C, less than or equal to 0.020% of Si, less than or equal to 0.010% of S, less than or equal to 0.010% of P, less than or equal to 0.005% of O, and less than or equal to 0.005% of N.
Preferably, the metal manganese powder comprises the following chemical components in percentage by mass: the graphite comprises more than or equal to 97.0 percent of Mn, less than or equal to 0.05 percent of C, less than or equal to 0.02 percent of S and less than or equal to 0.03 percent of P, and the graphite comprises the following chemical components in percentage by mass: the content of C is more than or equal to 95%, the content of S is less than or equal to 0.10%, the content of P is less than or equal to 0.010%, and the potassium carbonate comprises the following chemical components in percentage by mass: k2CO3More than or equal to 98.0 percent, less than or equal to 0.02 percent of S, less than or equal to 0.02 percent of P, wherein the potassium titanate comprises the following chemical components in percentage by mass: 30-35% of Na2O+K250-59% of O, TiO2，S≤0.02%，P≤0.02%。
The preparation method of the electric welding rod for the high manganese austenite low temperature steel with the seamless welding core comprises the following steps:
(1) weighing the components in the flux core as required, baking potassium carbonate and potassium titanate at the high temperature of 440-460 ℃, preserving heat for 0.8-1.2 h, and removing water;
(2) mixing the treated potassium carbonate and potassium titanate with other components in the drug core, and keeping the temperature at 110-130 ℃ after mixing the powder to prevent the potassium carbonate and potassium titanate from absorbing moisture again to prepare drug core powder;
(3) weighing the components in the coating according to the requirements, mixing and stirring uniformly to obtain dry powder, adding pure sodium silicate with the weight being 24-30% of the total weight of the dry powder into the dry powder, and mixing and stirring;
(4) pressing the skin of the low-carbon steel strip into a U shape by a rolling unit, synchronously adding the flux-cored powder into the skin on line, closing the skin after the flux-cored powder is added into a flux-cored wire blank with an O-shaped section under the rolling of a forming roll, welding the flux-cored wire blank at the closed position by adopting high-frequency welding to enable the seamed pipe to become a seamless pipe, and then drawing and reducing the seamless pipe one by one to prepare a seamless welding core;
(5) and (4) manufacturing the seamless welding core and the coating into the welding rod on the conventional welding rod production equipment.
Preferably, the modulus of the pure sodium silicate is 3.2, and the density is 1.40-1.45 g/mm3And a baume degree of 43.
The invention has the beneficial effects that:
(1) the welding core adopts a seamless flux-cored wire form, and a part of alloy is wrapped in the seamless flux-cored wire, so that not only can alloy transition be completed, but also the resistance of the welding core is greatly reduced, the metal transition form is improved, the welding manufacturability is optimized, and the utilization rate of the welding rod is improved; in addition, because the moisture absorption tendency of the seamless flux-cored wire is far less than that of the coating, a certain amount of potassium carbonate and potassium titanate which have excellent arc stability and are easy to absorb moisture are added into the seamless flux-cored wire after being baked at high temperature, so that the addition amount of the potassium carbonate and the potassium titanate in the coating is reduced, the moisture absorption resistance of the welding rod is effectively improved, and the diffusible hydrogen content of deposited metal of the welding rod is reduced; meanwhile, the coating is added with alloying elements, deoxidizer, slag former, arc stabilizer, gas former and the like, so that on one hand, the coating is matched with the core wire to complete alloy transition, and on the other hand, the welding rod obtains good all-position welding manufacturability;
(2) according to the invention, the welding core is made into a seamless flux-cored wire, so that the resistance of the welding core is only 1/3 of the solid high-manganese welding core, and the problem that the welding rod turns red in the welding process is avoided; in addition, the invention completes the transition from metal to welding seam in the form of spray transition in the welding process, and the welding manufacturability is greatly improved; therefore, the invention can ensure good welding joint performance, realize good welding manufacturability and welding rod utilization rate, and has the advantages of small resistance, good all-position welding manufacturability, stable electric arc, clear molten pool, easy slag removal, no air hole, low hot crack sensitivity, moisture absorption resistance and good low-temperature toughness.
Detailed Description
The following specific examples are given to further clarify, complete and detailed the technical solution of the present invention. The present embodiment is a preferred embodiment based on the technical solution of the present invention, but the scope of the present invention is not limited to the following embodiments.
The electric welding rod for the high-manganese austenitic low-temperature steel with the seamless welding core comprises a welding core and a coating, wherein the welding core comprises a flux core and a coating, the flux core accounts for 34-35% of the total weight of the welding core, and each flux coreThe components by weight ratio are as follows: 90-96% of metal manganese powder, 1-3% of graphite, 1-3% of potassium carbonate, 0-2% of potassium titanate and the balance of reduced iron powder; the metal manganese powder comprises the following chemical components in percentage by mass: the graphite comprises more than or equal to 97.0 percent of Mn, less than or equal to 0.05 percent of C, less than or equal to 0.02 percent of S and less than or equal to 0.03 percent of P, and the graphite comprises the following chemical components in percentage by mass: the content of C is more than or equal to 95%, the content of S is less than or equal to 0.10%, the content of P is less than or equal to 0.010%, and the potassium carbonate comprises the following chemical components in percentage by mass: k2CO3More than or equal to 98.0 percent, less than or equal to 0.02 percent of S, less than or equal to 0.02 percent of P, wherein the potassium titanate comprises the following chemical components in percentage by mass: 30-35% of Na2O+K250-59% of O, TiO2，S≤0.02%，P≤0.02%；
The surface is a low-carbon steel strip which comprises the following chemical components in percentage by mass: 0.1-0.4% of Mn, less than or equal to 0.10% of C, less than or equal to 0.020% of Si, less than or equal to 0.010% of S, less than or equal to 0.010% of P, less than or equal to 0.005% of O, and less than or equal to 0.005% of N;
the coating comprises the following components in percentage by weight: 27-33% of marble, 4-11% of barium carbonate, 20-24% of fluorite, 1-3% of rutile, 3-7% of aluminum oxide, 1-3% of quartz, 1-3% of dehydrated mica, 1-2% of CMC, 7-12% of 45# ferrosilicon, 3-8% of metallic nickel powder, 5-10% of metallic chromium powder, 3-8% of metallic molybdenum powder and 0-1% of chromium nitride;
according to the proportion of the seamless welding core and the coating, the requirements for obtaining deposited metal are as follows: c: 0.2-0.6 wt%, Si: 0.3-0.8 wt%, Mn: 20-28 wt%, Ni: 1.0-4.0 wt%, Cr: 2.0-6.0 wt%, Mo: 1.0-4.0, and N is less than or equal to 0.05; s: less than or equal to 0.015wt%, P: less than or equal to 0.020wt percent and the balance of Fe.
The preparation method of the electric welding rod for the high manganese austenite low temperature steel with the seamless welding core comprises the following steps:
(1) weighing the components in the flux core as required, baking potassium carbonate and potassium titanate at the high temperature of 440-460 ℃, preserving heat for 0.8-1.2 h, and removing water;
(2) mixing the treated potassium carbonate and potassium titanate with other components in the drug core, and keeping the temperature at 110-130 ℃ after mixing the powder to prevent the potassium carbonate and potassium titanate from absorbing moisture again to prepare drug core powder;
(3) weighing the components of the coating according to the requirement, mixing and stirring uniformly to obtain dry powder, and adding the dry powderAdding pure sodium silicate with the total weight of 24-30% of the dry powder, mixing and stirring, wherein the modulus of the pure sodium silicate is 3.2, and the density is 1.40-1.45 g/mm3Baume degree of 43 °;
(4) pressing the skin of the low-carbon steel strip into a U shape by a rolling unit, synchronously adding the flux-cored powder into the skin on line, closing the skin after the flux-cored powder is added into a flux-cored wire blank with an O-shaped section under the rolling of a forming roll, welding the flux-cored wire blank at the closed position by adopting high-frequency welding to enable the seamed pipe to become a seamless pipe, and then drawing and reducing the seamless pipe one by one to prepare a seamless welding core;
(5) and (4) manufacturing the seamless welding core and the coating into the welding rod on the conventional welding rod production equipment.
The main raw materials of the core wire have the following functions:
metal manganese powder: transition manganese element into the welding seam;
potassium titanate, potassium carbonate: the arc stabilizer mainly plays an arc stabilizing role, the welding manufacturability can be optimized by properly adding potassium carbonate and potassium titanate, the arc stabilizing effect is insufficient when the adding amount is too small, the arc stabilizing effect is not great when the adding amount is too large, and the cost is increased;
graphite: the main function is to stabilize the arc and to carburise into the weld.
The main raw materials in the traditional Chinese medicine skin have the following functions:
marble, barium carbonate: the main functions of the two are slagging, gas making and arc stabilization, the alkalinity of the slag is improved, the surface tension and the interfacial tension of the slag are increased, the arc stability of barium carbonate is superior to that of marble, and the proper increase of the proportion of barium carbonate is beneficial to improving the stability of the arc; when the total addition amount of the two is less than 31wt%, the slagging amount is insufficient, and the deposited metal is not fully protected; when the addition amount is more than 44wt%, the melting point of the coating is increased, the welding speed is reduced, molten iron becomes sticky, and pores are easily generated in a welding line;
fluorite: the main functions are slagging and dehydrogenation, and the proper amount of the additive can adjust the melting point and viscosity of the molten slag and increase the fluidity of the molten slag so as to achieve the purposes of activating a molten pool, improving slag removal and dehydrogenation; when the addition of fluorite is less than 20wt%, molten iron is viscous, the content of diffused hydrogen of deposited metal is higher, and when the addition is more than 24wt%, the melting point of a coating is low, and the stability of electric arc is poor;
rutile, alumina, quartz: the method mainly has the main effects of slagging, refining molten drops, adjusting the viscosity and melting point of molten slag and increasing the activity of the slag, and the suitable adding amounts of the three components are 1-3 wt% of rutile, 3-7 wt% of alumina and 1-3 wt% of quartz respectively;
dehydrated mica: the main function is to improve the press coating property and stabilize the electric arc, when the addition of the deiscolite is more than 3wt%, the diffusible hydrogen content of the deposited metal is higher; when the amount is less than 1wt%, the press-coating property of the electrode becomes poor;
CMC: the smoothness of the coating is increased, when the addition amount is more than 2wt%, the welding rod is easy to absorb moisture, and when the addition amount is less than 1wt%, the effect of improving the press coating property is not obvious;
45# ferrosilicon: the deoxidizer is a main deoxidizer, can accelerate the melting of the welding rod, and the deoxidized product participates in slag formation, improves the fluidity of the slag and provides Si element for the welding line; when the addition amount is more than 12wt%, the Si element in the welding seam is higher, the impact toughness of the welding seam is deteriorated, and when the addition amount is less than 7wt%, the deoxidation of the welding seam is insufficient, and the fluidity of slag is also deteriorated;
metal nickel powder, metal chromium powder, metal molybdenum powder: alloy elements are added into the welding seam to meet the mechanical property of the welding seam, and the adding amount of the alloy elements is 3-8 wt% of metal nickel powder, 5-10 wt% of metal chromium powder and 3-8 wt% of metal molybdenum powder respectively;
ferrochromium nitride: nitrogen and transition chromium are added into the welding seam to play a role in improving the performance of the welding seam, but the nitrogen content in the welding seam is too high due to the addition of more than 1.0 percent, and the plasticity and toughness of the welding seam are deteriorated, and the addition of the chromium iron nitride is not more than 1.0 percent;
pure sodium silicate: the main effects are to bond the powder, when the adding amount of the water glass is more than 30wt%, the press coating pressure is small, the compactness and the strength of the coating are poor, and when the adding amount is less than 24wt%, the press coating pressure is high, the coating is hairy, and eccentricity is not easy to control.
The effect of each alloy element in the welding seam is as follows:
carbon (C): the most important strengthening element in the steel, which is also an important austenite forming element in the high manganese steel, cooperates with Mn and Ni to maintain the weld structure as a pure austenite structure,however, if the carbon content exceeds 0.6%, a large amount of gas is generated during welding, and pores are easily generated, and MC and M are generated by the combination of carbon and alloy elements such as manganese, chromium and the like23C6And the like, thereby reducing the reduction of low-temperature impact toughness, so that the carbon content needs to be controlled to be 0.2-0.6 wt%;
silicon (Si): an element added for producing a deoxidizing effect and spreadability of a weld bead in a welded joint. If the silicon content is low, SiO is produced2On the other hand, if the content of silicon exceeds 0.8%, segregation or the like occurs in the welded joint, thereby lowering the low-temperature impact toughness and increasing the susceptibility to thermal cracking, and therefore, the content of silicon is controlled to 0.3 to 0.8%;
manganese (Mn): the main elements forming the low-temperature stable phase austenite are the most important alloy elements in the invention, the content is 20-28 wt%, the main elements and C, Ni act together when the molten pool metal is solidified, the austenite is used as a solidification initial phase and is kept to the room temperature, and finally the weld structure is the austenite phase. Mn has the effects of solid solution strengthening, austenite stabilization and epsilon-martensite formation inhibition, but when the Mn is too high, more segregation is generated, brittle fracture along grain boundaries is generated, the low-temperature toughness is reduced, and more harmful welding smoke is generated in the welding process, so that the Mn content is controlled to be 20-28 wt%;
nickel (Ni): the addition can improve the stacking fault energy of the weld metal, so that the low-temperature impact toughness is improved, but the addition amount is too large, so that the weld metal strength is reduced, the cost of welding materials is increased, and the optimal content of nickel is 1.0-4.0 wt% in comprehensive consideration;
chromium (Cr): the main effect is to improve the strength of the weld metal, but when the chromium content exceeds 6.0%, excessive chromium carbide can be generated, so that the problem of reducing the low-temperature toughness can be caused, and therefore, the chromium content is controlled to be below 2.0-6.0%;
molybdenum (Mo): the method has the main effects of improving the strength of weld metal and reducing a solid-liquid coexisting region so as to inhibit the generation of high-temperature cracks of the weld, but when the content of Mo in the weld exceeds 4.0%, excessive molybdenum carbide can be generated like chromium, so that the risk of reducing the temperature toughness exists, and the content of molybdenum is controlled to be 1.0-4.0%;
nitrogen (N): the strength of the weld metal is improved by matching with other strengthening elements, but when the added N is too much, large-size nitride inclusions are easily formed, and the plasticity and the toughness of the weld are seriously deteriorated. The upper limit of N in the invention is 0.05%;
sulfur (S), phosphorus (P): sulfur and phosphorus are harmful elements in the weld joint, sulfur is easy to form FeS low-melting-point compounds to increase welding heat crack sensitivity, phosphorus is easy to form brittle compounds on grain boundaries to deteriorate the toughness of the weld joint, so that the contents of sulfur and phosphorus are reduced as much as possible, and the upper limits of sulfur and phosphorus are respectively determined to be 0.015wt% and 0.020wt% according to test results.
The invention is further illustrated by the following examples:
example 1
The electric welding rod with the seamless welding core for the high-manganese austenitic low-temperature steel comprises a welding core and a coating, wherein the welding core comprises a flux core and a coating, the flux core accounts for 34-35% of the total weight of the welding core, and the flux core comprises the following components in percentage by weight: 90% of metal manganese powder, 3% of graphite, 3% of potassium carbonate, 0% of potassium titanate and 4% of reduced iron powder; the metal manganese powder comprises the following chemical components in percentage by mass: the graphite comprises more than or equal to 97.0 percent of Mn, less than or equal to 0.05 percent of C, less than or equal to 0.02 percent of S and less than or equal to 0.03 percent of P, and the graphite comprises the following chemical components in percentage by mass: the content of C is more than or equal to 95%, the content of S is less than or equal to 0.10%, the content of P is less than or equal to 0.010%, and the potassium carbonate comprises the following chemical components in percentage by mass: k2CO3More than or equal to 98.0 percent, less than or equal to 0.02 percent of S, less than or equal to 0.02 percent of P, wherein the potassium titanate comprises the following chemical components in percentage by mass: 30-35% of Na2O+K250-59% of O, TiO2，S≤0.02%，P≤0.02%；
The surface is a low-carbon steel strip which comprises the following chemical components in percentage by mass: 0.1-0.4% of Mn, less than or equal to 0.10% of C, less than or equal to 0.020% of Si, less than or equal to 0.010% of S, less than or equal to 0.010% of P, less than or equal to 0.005% of O, and less than or equal to 0.005% of N;
the coating comprises the following components in percentage by weight: 27% of marble, 11% of barium carbonate, 24% of fluorite, 1% of rutile, 7% of alumina, 3% of quartz, 1% of dehydrated mica, 2% of CMC, 7% of 45# ferrosilicon, 3% of metal nickel powder, 5% of metal chromium powder, 8% of metal molybdenum powder and 1% of chromium iron nitride.
The preparation method of the electric welding rod for the high manganese austenite low temperature steel with the seamless welding core comprises the following steps:
(1) weighing the components in the flux core as required, baking potassium carbonate and potassium titanate at the high temperature of 440 ℃ and keeping the temperature for 0.8h, and removing water;
(2) mixing the treated potassium carbonate and potassium titanate with other components in the drug core, keeping the temperature at 110 ℃ after mixing the powder, and avoiding the potassium carbonate and potassium titanate from absorbing moisture again to prepare drug core powder;
(3) weighing the components in the coating according to the requirements, mixing and stirring uniformly to obtain dry powder, adding pure sodium silicate with the weight of 24% of the total weight of the dry powder into the dry powder, mixing and stirring, wherein the modulus of the pure sodium silicate is 3.2, and the density is 1.40g/mm3Baume degree of 43 °;
(4) pressing the skin of the low-carbon steel strip into a U shape by a rolling unit, synchronously adding the flux-cored powder into the skin on line, closing the skin after the flux-cored powder is added into a flux-cored wire blank with an O-shaped section under the rolling of a forming roll, welding the flux-cored wire blank at the closed position by adopting high-frequency welding to enable the seamed pipe to become a seamless pipe, and then drawing and reducing the seamless pipe one by one to prepare a seamless welding core;
(5) and (4) manufacturing the seamless welding core and the coating into the welding rod on the conventional welding rod production equipment.
Example 2
The electric welding rod with the seamless welding core for the high-manganese austenitic low-temperature steel comprises a welding core and a coating, wherein the welding core comprises a flux core and a coating, the flux core accounts for 34-35% of the total weight of the welding core, and the flux core comprises the following components in percentage by weight: 90% of metal manganese powder, 3% of graphite, 3% of potassium carbonate, 0% of potassium titanate and 4% of reduced iron powder; the metal manganese powder comprises the following chemical components in percentage by mass: the graphite comprises more than or equal to 97.0 percent of Mn, less than or equal to 0.05 percent of C, less than or equal to 0.02 percent of S and less than or equal to 0.03 percent of P, and the graphite comprises the following chemical components in percentage by mass: the content of C is more than or equal to 95%, the content of S is less than or equal to 0.10%, the content of P is less than or equal to 0.010%, and the potassium carbonate comprises the following chemical components in percentage by mass: k2CO3More than or equal to 98.0 percent, less than or equal to 0.02 percent of S, less than or equal to 0.02 percent of P, and the potassium titanate comprises the following chemical components in percentage by massThe components: 30-35% of Na2O+K250-59% of O, TiO2，S≤0.02%，P≤0.02%；
The surface is a low-carbon steel strip which comprises the following chemical components in percentage by mass: 0.1-0.4% of Mn, less than or equal to 0.10% of C, less than or equal to 0.020% of Si, less than or equal to 0.010% of S, less than or equal to 0.010% of P, less than or equal to 0.005% of O, and less than or equal to 0.005% of N;
the coating comprises the following components in percentage by weight: 30% of marble, 7% of barium carbonate, 22% of fluorite, 3% of rutile, 5% of aluminum oxide, 1% of quartz, 3% of dehydrated mica, 1% of CMC, 10% of No. 45 ferrosilicon, 6.5% of metal nickel powder, 6.5% of metal chromium powder, 4.5% of metal molybdenum powder and 0.5% of ferrochromium nitride.
The preparation method of the electric welding rod for the high manganese austenite low temperature steel with the seamless welding core comprises the following steps:
(1) weighing the components in the flux core as required, baking potassium carbonate and potassium titanate at the high temperature of 440 ℃ and keeping the temperature for 0.8h, and removing water;
(2) mixing the treated potassium carbonate and potassium titanate with other components in the drug core, keeping the temperature at 110 ℃ after mixing the powder, and avoiding the potassium carbonate and potassium titanate from absorbing moisture again to prepare drug core powder;
(3) weighing the components in the coating according to the requirements, mixing and stirring uniformly to obtain dry powder, adding pure sodium silicate with the weight of 24% of the total weight of the dry powder into the dry powder, mixing and stirring, wherein the modulus of the pure sodium silicate is 3.2, and the density is 1.40g/mm3Baume degree of 43 °;
(4) pressing the skin of the low-carbon steel strip into a U shape by a rolling unit, synchronously adding the flux-cored powder into the skin on line, closing the skin after the flux-cored powder is added into a flux-cored wire blank with an O-shaped section under the rolling of a forming roll, welding the flux-cored wire blank at the closed position by adopting high-frequency welding to enable the seamed pipe to become a seamless pipe, and then drawing and reducing the seamless pipe one by one to prepare a seamless welding core;
(5) and (4) manufacturing the seamless welding core and the coating into the welding rod on the conventional welding rod production equipment.
Example 3
An electric welding rod for high-manganese austenitic low-temperature steel with seamless core wire comprises a core wire and a coating, wherein the core wire comprises a flux coreAnd the flux core accounts for 34-35% of the total weight of the welding core, and the flux core comprises the following components in percentage by weight: 90% of metal manganese powder, 3% of graphite, 3% of potassium carbonate, 0% of potassium titanate and 4% of reduced iron powder; the metal manganese powder comprises the following chemical components in percentage by mass: the graphite comprises more than or equal to 97.0 percent of Mn, less than or equal to 0.05 percent of C, less than or equal to 0.02 percent of S and less than or equal to 0.03 percent of P, and the graphite comprises the following chemical components in percentage by mass: the content of C is more than or equal to 95%, the content of S is less than or equal to 0.10%, the content of P is less than or equal to 0.010%, and the potassium carbonate comprises the following chemical components in percentage by mass: k2CO3More than or equal to 98.0 percent, less than or equal to 0.02 percent of S, less than or equal to 0.02 percent of P, wherein the potassium titanate comprises the following chemical components in percentage by mass: 30-35% of Na2O+K250-59% of O, TiO2，S≤0.02%，P≤0.02%；
The surface is a low-carbon steel strip which comprises the following chemical components in percentage by mass: 0.1-0.4% of Mn, less than or equal to 0.10% of C, less than or equal to 0.020% of Si, less than or equal to 0.010% of S, less than or equal to 0.010% of P, less than or equal to 0.005% of O, and less than or equal to 0.005% of N;
the coating comprises the following components in percentage by weight: 33% of marble, 4% of barium carbonate, 20% of fluorite, 2% of rutile, 3% of alumina, 1% of quartz, 2% of dehydrated mica, 2% of CMC, 12% of 45# ferrosilicon, 5% of metal nickel powder, 10% of metal chromium powder, 6% of metal molybdenum powder and 0% of ferrochrome nitride.
The preparation method of the electric welding rod for the high manganese austenite low temperature steel with the seamless welding core comprises the following steps:
(1) weighing the components in the flux core as required, baking potassium carbonate and potassium titanate at the high temperature of 440 ℃ and keeping the temperature for 0.8h, and removing water;
(2) mixing the treated potassium carbonate and potassium titanate with other components in the drug core, keeping the temperature at 110 ℃ after mixing the powder, and avoiding the potassium carbonate and potassium titanate from absorbing moisture again to prepare drug core powder;
(3) weighing the components in the coating according to the requirements, mixing and stirring uniformly to obtain dry powder, adding pure sodium silicate with the weight of 24% of the total weight of the dry powder into the dry powder, mixing and stirring, wherein the modulus of the pure sodium silicate is 3.2, and the density is 1.40g/mm3Baume degree of 43 °;
(4) pressing the skin of the low-carbon steel strip into a U shape by a rolling unit, synchronously adding the flux-cored powder into the skin on line, closing the skin after the flux-cored powder is added into a flux-cored wire blank with an O-shaped section under the rolling of a forming roll, welding the flux-cored wire blank at the closed position by adopting high-frequency welding to enable the seamed pipe to become a seamless pipe, and then drawing and reducing the seamless pipe one by one to prepare a seamless welding core;
(5) and (4) manufacturing the seamless welding core and the coating into the welding rod on the conventional welding rod production equipment.
Example 4
The electric welding rod with the seamless welding core for the high-manganese austenitic low-temperature steel comprises a welding core and a coating, wherein the welding core comprises a flux core and a coating, the flux core accounts for 34-35% of the total weight of the welding core, and the flux core comprises the following components in percentage by weight: 93% of metal manganese powder, 2% of graphite, 1% of potassium carbonate, 2% of potassium titanate and 2% of reduced iron powder; the metal manganese powder comprises the following chemical components in percentage by mass: the graphite comprises more than or equal to 97.0 percent of Mn, less than or equal to 0.05 percent of C, less than or equal to 0.02 percent of S and less than or equal to 0.03 percent of P, and the graphite comprises the following chemical components in percentage by mass: the content of C is more than or equal to 95%, the content of S is less than or equal to 0.10%, the content of P is less than or equal to 0.010%, and the potassium carbonate comprises the following chemical components in percentage by mass: k2CO3More than or equal to 98.0 percent, less than or equal to 0.02 percent of S, less than or equal to 0.02 percent of P, wherein the potassium titanate comprises the following chemical components in percentage by mass: 30-35% of Na2O+K250-59% of O, TiO2，S≤0.02%，P≤0.02%；
The surface is a low-carbon steel strip which comprises the following chemical components in percentage by mass: 0.1-0.4% of Mn, less than or equal to 0.10% of C, less than or equal to 0.020% of Si, less than or equal to 0.010% of S, less than or equal to 0.010% of P, less than or equal to 0.005% of O, and less than or equal to 0.005% of N;
the coating comprises the following components in percentage by weight: 27% of marble, 11% of barium carbonate, 24% of fluorite, 1% of rutile, 7% of alumina, 3% of quartz, 1% of dehydrated mica, 2% of CMC, 7% of 45# ferrosilicon, 3% of metal nickel powder, 5% of metal chromium powder, 8% of metal molybdenum powder and 1% of chromium iron nitride.
The preparation method of the electric welding rod for the high manganese austenite low temperature steel with the seamless welding core comprises the following steps:
(1) weighing the components in the flux core according to the requirements, baking potassium carbonate and potassium titanate at the high temperature of 450 ℃ and preserving heat for 1h, and removing water;
(2) mixing the treated potassium carbonate and potassium titanate with other components in the drug core, keeping the temperature at 120 ℃ after mixing the powder, and avoiding the potassium carbonate and potassium titanate from absorbing moisture again to prepare drug core powder;
(3) weighing the components in the coating according to the requirements, mixing and stirring uniformly to obtain dry powder, adding sodium silicate accounting for 27 percent of the total weight of the dry powder into the dry powder, mixing and stirring, wherein the modulus of the sodium silicate is 3.2, and the density of the sodium silicate is 1.42g/mm3Baume degree of 43 °;
(4) pressing the skin of the low-carbon steel strip into a U shape by a rolling unit, synchronously adding the flux-cored powder into the skin on line, closing the skin after the flux-cored powder is added into a flux-cored wire blank with an O-shaped section under the rolling of a forming roll, welding the flux-cored wire blank at the closed position by adopting high-frequency welding to enable the seamed pipe to become a seamless pipe, and then drawing and reducing the seamless pipe one by one to prepare a seamless welding core;
(5) and (4) manufacturing the seamless welding core and the coating into the welding rod on the conventional welding rod production equipment.
Example 5
The electric welding rod with the seamless welding core for the high-manganese austenitic low-temperature steel comprises a welding core and a coating, wherein the welding core comprises a flux core and a coating, the flux core accounts for 34-35% of the total weight of the welding core, and the flux core comprises the following components in percentage by weight: 93% of metal manganese powder, 2% of graphite, 1% of potassium carbonate, 2% of potassium titanate and 2% of reduced iron powder; the metal manganese powder comprises the following chemical components in percentage by mass: the graphite comprises more than or equal to 97.0 percent of Mn, less than or equal to 0.05 percent of C, less than or equal to 0.02 percent of S and less than or equal to 0.03 percent of P, and the graphite comprises the following chemical components in percentage by mass: the content of C is more than or equal to 95%, the content of S is less than or equal to 0.10%, the content of P is less than or equal to 0.010%, and the potassium carbonate comprises the following chemical components in percentage by mass: k2CO3More than or equal to 98.0 percent, less than or equal to 0.02 percent of S, less than or equal to 0.02 percent of P, wherein the potassium titanate comprises the following chemical components in percentage by mass: 30-35% of Na2O+K250-59% of O, TiO2，S≤0.02%，P≤0.02%；
The surface is a low-carbon steel strip which comprises the following chemical components in percentage by mass: 0.1-0.4% of Mn, less than or equal to 0.10% of C, less than or equal to 0.020% of Si, less than or equal to 0.010% of S, less than or equal to 0.010% of P, less than or equal to 0.005% of O, and less than or equal to 0.005% of N;
the coating comprises the following components in percentage by weight: 30% of marble, 7% of barium carbonate, 22% of fluorite, 3% of rutile, 5% of aluminum oxide, 1% of quartz, 3% of dehydrated mica, 1% of CMC, 10% of No. 45 ferrosilicon, 6.5% of metal nickel powder, 6.5% of metal chromium powder, 4.5% of metal molybdenum powder and 0.5% of ferrochromium nitride.
The preparation method of the electric welding rod for the high manganese austenite low temperature steel with the seamless welding core comprises the following steps:
(1) weighing the components in the flux core according to the requirements, baking potassium carbonate and potassium titanate at the high temperature of 450 ℃ and preserving heat for 1h, and removing water;
(2) mixing the treated potassium carbonate and potassium titanate with other components in the drug core, keeping the temperature at 120 ℃ after mixing the powder, and avoiding the potassium carbonate and potassium titanate from absorbing moisture again to prepare drug core powder;
(3) weighing the components in the coating according to the requirements, mixing and stirring uniformly to obtain dry powder, adding sodium silicate accounting for 27 percent of the total weight of the dry powder into the dry powder, mixing and stirring, wherein the modulus of the sodium silicate is 3.2, and the density of the sodium silicate is 1.42g/mm3Baume degree of 43 °;
(4) pressing the skin of the low-carbon steel strip into a U shape by a rolling unit, synchronously adding the flux-cored powder into the skin on line, closing the skin after the flux-cored powder is added into a flux-cored wire blank with an O-shaped section under the rolling of a forming roll, welding the flux-cored wire blank at the closed position by adopting high-frequency welding to enable the seamed pipe to become a seamless pipe, and then drawing and reducing the seamless pipe one by one to prepare a seamless welding core;
(5) and (4) manufacturing the seamless welding core and the coating into the welding rod on the conventional welding rod production equipment.
Example 6
The electric welding rod with the seamless welding core for the high-manganese austenitic low-temperature steel comprises a welding core and a coating, wherein the welding core comprises a flux core and a coating, the flux core accounts for 34-35% of the total weight of the welding core, and the flux core comprises the following components in percentage by weight: 93% of metal manganese powder, 2% of graphite, 1% of potassium carbonate, 2% of potassium titanate and 2% of reduced iron powder; the metal manganese powder comprises the following chemical components in percentage by mass: the graphite comprises more than or equal to 97.0 percent of Mn, less than or equal to 0.05 percent of C, less than or equal to 0.02 percent of S and less than or equal to 0.03 percent of P, and the graphite comprises the following chemical components in percentage by mass: more than or equal to 95 percent of C, less than or equal to 0.10 percent of S, less than or equal to 0.010 percent of P, and the potassium carbonateThe chemical components comprise the following mass fractions: k2CO3More than or equal to 98.0 percent, less than or equal to 0.02 percent of S, less than or equal to 0.02 percent of P, wherein the potassium titanate comprises the following chemical components in percentage by mass: 30-35% of Na2O+K250-59% of O, TiO2，S≤0.02%，P≤0.02%；
The surface is a low-carbon steel strip which comprises the following chemical components in percentage by mass: 0.1-0.4% of Mn, less than or equal to 0.10% of C, less than or equal to 0.020% of Si, less than or equal to 0.010% of S, less than or equal to 0.010% of P, less than or equal to 0.005% of O, and less than or equal to 0.005% of N;
the coating comprises the following components in percentage by weight: 33% of marble, 4% of barium carbonate, 20% of fluorite, 2% of rutile, 3% of alumina, 1% of quartz, 2% of dehydrated mica, 2% of CMC, 12% of 45# ferrosilicon, 5% of metal nickel powder, 10% of metal chromium powder, 6% of metal molybdenum powder and 0% of ferrochrome nitride.
The preparation method of the electric welding rod for the high manganese austenite low temperature steel with the seamless welding core comprises the following steps:
(1) weighing the components in the flux core according to the requirements, baking potassium carbonate and potassium titanate at the high temperature of 450 ℃ and preserving heat for 1h, and removing water;
(2) mixing the treated potassium carbonate and potassium titanate with other components in the drug core, keeping the temperature at 120 ℃ after mixing the powder, and avoiding the potassium carbonate and potassium titanate from absorbing moisture again to prepare drug core powder;
(3) weighing the components in the coating according to the requirements, mixing and stirring uniformly to obtain dry powder, adding sodium silicate accounting for 27 percent of the total weight of the dry powder into the dry powder, mixing and stirring, wherein the modulus of the sodium silicate is 3.2, and the density of the sodium silicate is 1.42g/mm3Baume degree of 43 °;
(4) pressing the skin of the low-carbon steel strip into a U shape by a rolling unit, synchronously adding the flux-cored powder into the skin on line, closing the skin after the flux-cored powder is added into a flux-cored wire blank with an O-shaped section under the rolling of a forming roll, welding the flux-cored wire blank at the closed position by adopting high-frequency welding to enable the seamed pipe to become a seamless pipe, and then drawing and reducing the seamless pipe one by one to prepare a seamless welding core;
(5) and (4) manufacturing the seamless welding core and the coating into the welding rod on the conventional welding rod production equipment.
Example 7
The electric welding rod with the seamless welding core for the high-manganese austenitic low-temperature steel comprises a welding core and a coating, wherein the welding core comprises a flux core and a coating, the flux core accounts for 34-35% of the total weight of the welding core, and the flux core comprises the following components in percentage by weight: 96% of metal manganese powder, 1% of graphite, 2% of potassium carbonate, 1% of potassium titanate and 0% of reduced iron powder; the metal manganese powder comprises the following chemical components in percentage by mass: the graphite comprises more than or equal to 97.0 percent of Mn, less than or equal to 0.05 percent of C, less than or equal to 0.02 percent of S and less than or equal to 0.03 percent of P, and the graphite comprises the following chemical components in percentage by mass: the content of C is more than or equal to 95%, the content of S is less than or equal to 0.10%, the content of P is less than or equal to 0.010%, and the potassium carbonate comprises the following chemical components in percentage by mass: k2CO3More than or equal to 98.0 percent, less than or equal to 0.02 percent of S, less than or equal to 0.02 percent of P, wherein the potassium titanate comprises the following chemical components in percentage by mass: 30-35% of Na2O+K250-59% of O, TiO2，S≤0.02%，P≤0.02%；
The surface is a low-carbon steel strip which comprises the following chemical components in percentage by mass: 0.1-0.4% of Mn, less than or equal to 0.10% of C, less than or equal to 0.020% of Si, less than or equal to 0.010% of S, less than or equal to 0.010% of P, less than or equal to 0.005% of O, and less than or equal to 0.005% of N;
the coating comprises the following components in percentage by weight: 27% of marble, 11% of barium carbonate, 24% of fluorite, 1% of rutile, 7% of alumina, 3% of quartz, 1% of dehydrated mica, 2% of CMC, 7% of 45# ferrosilicon, 3% of metal nickel powder, 5% of metal chromium powder, 8% of metal molybdenum powder and 1% of chromium iron nitride.
The preparation method of the electric welding rod for the high manganese austenite low temperature steel with the seamless welding core comprises the following steps:
(1) weighing the components in the flux core as required, baking potassium carbonate and potassium titanate at high temperature of 460 ℃ and keeping the temperature for 1.2h, and removing water;
(2) mixing the treated potassium carbonate and potassium titanate with other components in the drug core, keeping the temperature at 130 ℃ after mixing the powder, and avoiding the potassium carbonate and potassium titanate from absorbing moisture again to prepare drug core powder;
(3) weighing the components in the coating according to the requirements, mixing and stirring uniformly to obtain dry powder, adding pure sodium silicate accounting for 30 percent of the total weight of the dry powder into the dry powder, mixing and stirring, wherein the modulus of the pure sodium silicate is 3.2, and the density of the pure sodium silicate is 1.45g/mm3Baume degree of 43 °;
(4) pressing the skin of the low-carbon steel strip into a U shape by a rolling unit, synchronously adding the flux-cored powder into the skin on line, closing the skin after the flux-cored powder is added into a flux-cored wire blank with an O-shaped section under the rolling of a forming roll, welding the flux-cored wire blank at the closed position by adopting high-frequency welding to enable the seamed pipe to become a seamless pipe, and then drawing and reducing the seamless pipe one by one to prepare a seamless welding core;
(5) and (4) manufacturing the seamless welding core and the coating into the welding rod on the conventional welding rod production equipment.
Example 8
The electric welding rod with the seamless welding core for the high-manganese austenitic low-temperature steel comprises a welding core and a coating, wherein the welding core comprises a flux core and a coating, the flux core accounts for 34-35% of the total weight of the welding core, and the flux core comprises the following components in percentage by weight: 96% of metal manganese powder, 1% of graphite, 2% of potassium carbonate, 1% of potassium titanate and 0% of reduced iron powder; the metal manganese powder comprises the following chemical components in percentage by mass: the graphite comprises more than or equal to 97.0 percent of Mn, less than or equal to 0.05 percent of C, less than or equal to 0.02 percent of S and less than or equal to 0.03 percent of P, and the graphite comprises the following chemical components in percentage by mass: the content of C is more than or equal to 95%, the content of S is less than or equal to 0.10%, the content of P is less than or equal to 0.010%, and the potassium carbonate comprises the following chemical components in percentage by mass: k2CO3More than or equal to 98.0 percent, less than or equal to 0.02 percent of S, less than or equal to 0.02 percent of P, wherein the potassium titanate comprises the following chemical components in percentage by mass: 30-35% of Na2O+K250-59% of O, TiO2，S≤0.02%，P≤0.02%；
The surface is a low-carbon steel strip which comprises the following chemical components in percentage by mass: 0.1-0.4% of Mn, less than or equal to 0.10% of C, less than or equal to 0.020% of Si, less than or equal to 0.010% of S, less than or equal to 0.010% of P, less than or equal to 0.005% of O, and less than or equal to 0.005% of N;
the coating comprises the following components in percentage by weight: 30% of marble, 7% of barium carbonate, 22% of fluorite, 3% of rutile, 5% of aluminum oxide, 1% of quartz, 3% of dehydrated mica, 1% of CMC, 10% of No. 45 ferrosilicon, 6.5% of metal nickel powder, 6.5% of metal chromium powder, 4.5% of metal molybdenum powder and 0.5% of ferrochromium nitride.
The preparation method of the electric welding rod for the high manganese austenite low temperature steel with the seamless welding core comprises the following steps:
(1) weighing the components in the flux core as required, baking potassium carbonate and potassium titanate at high temperature of 460 ℃ and keeping the temperature for 1.2h, and removing water;
(2) mixing the treated potassium carbonate and potassium titanate with other components in the drug core, keeping the temperature at 130 ℃ after mixing the powder, and avoiding the potassium carbonate and potassium titanate from absorbing moisture again to prepare drug core powder;
(3) weighing the components in the coating according to the requirements, mixing and stirring uniformly to obtain dry powder, adding pure sodium silicate accounting for 30 percent of the total weight of the dry powder into the dry powder, mixing and stirring, wherein the modulus of the pure sodium silicate is 3.2, and the density of the pure sodium silicate is 1.45g/mm3Baume degree of 43 °;
(4) pressing the skin of the low-carbon steel strip into a U shape by a rolling unit, synchronously adding the flux-cored powder into the skin on line, closing the skin after the flux-cored powder is added into a flux-cored wire blank with an O-shaped section under the rolling of a forming roll, welding the flux-cored wire blank at the closed position by adopting high-frequency welding to enable the seamed pipe to become a seamless pipe, and then drawing and reducing the seamless pipe one by one to prepare a seamless welding core;
(5) and (4) manufacturing the seamless welding core and the coating into the welding rod on the conventional welding rod production equipment.
Example 9
The electric welding rod with the seamless welding core for the high-manganese austenitic low-temperature steel comprises a welding core and a coating, wherein the welding core comprises a flux core and a coating, the flux core accounts for 34-35% of the total weight of the welding core, and the flux core comprises the following components in percentage by weight: 96% of metal manganese powder, 1% of graphite, 2% of potassium carbonate, 1% of potassium titanate and 0% of reduced iron powder; the metal manganese powder comprises the following chemical components in percentage by mass: the graphite comprises more than or equal to 97.0 percent of Mn, less than or equal to 0.05 percent of C, less than or equal to 0.02 percent of S and less than or equal to 0.03 percent of P, and the graphite comprises the following chemical components in percentage by mass: the content of C is more than or equal to 95%, the content of S is less than or equal to 0.10%, the content of P is less than or equal to 0.010%, and the potassium carbonate comprises the following chemical components in percentage by mass: k2CO3More than or equal to 98.0 percent, less than or equal to 0.02 percent of S, less than or equal to 0.02 percent of P, wherein the potassium titanate comprises the following chemical components in percentage by mass: 30-35% of Na2O+K250-59% of O, TiO2，S≤0.02%，P≤0.02%；
The surface is a low-carbon steel strip which comprises the following chemical components in percentage by mass: 0.1-0.4% of Mn, less than or equal to 0.10% of C, less than or equal to 0.020% of Si, less than or equal to 0.010% of S, less than or equal to 0.010% of P, less than or equal to 0.005% of O, and less than or equal to 0.005% of N;
the coating comprises the following components in percentage by weight: 33% of marble, 4% of barium carbonate, 20% of fluorite, 2% of rutile, 3% of alumina, 1% of quartz, 2% of dehydrated mica, 2% of CMC, 12% of 45# ferrosilicon, 5% of metal nickel powder, 10% of metal chromium powder, 6% of metal molybdenum powder and 0% of ferrochrome nitride.
The preparation method of the electric welding rod for the high manganese austenite low temperature steel with the seamless welding core comprises the following steps:
(1) weighing the components in the flux core as required, baking potassium carbonate and potassium titanate at high temperature of 460 ℃ and keeping the temperature for 1.2h, and removing water;
(2) mixing the treated potassium carbonate and potassium titanate with other components in the drug core, keeping the temperature at 130 ℃ after mixing the powder, and avoiding the potassium carbonate and potassium titanate from absorbing moisture again to prepare drug core powder;
(3) weighing the components in the coating according to the requirements, mixing and stirring uniformly to obtain dry powder, adding pure sodium silicate accounting for 30 percent of the total weight of the dry powder into the dry powder, mixing and stirring, wherein the modulus of the pure sodium silicate is 3.2, and the density of the pure sodium silicate is 1.45g/mm3Baume degree of 43 °;
(4) pressing the skin of the low-carbon steel strip into a U shape by a rolling unit, synchronously adding the flux-cored powder into the skin on line, closing the skin after the flux-cored powder is added into a flux-cored wire blank with an O-shaped section under the rolling of a forming roll, welding the flux-cored wire blank at the closed position by adopting high-frequency welding to enable the seamed pipe to become a seamless pipe, and then drawing and reducing the seamless pipe one by one to prepare a seamless welding core;
(5) and (4) manufacturing the seamless welding core and the coating into the welding rod on the conventional welding rod production equipment.
Welding tests are carried out on the welding rods prepared in the embodiments 1-9, a welding rod with the diameter of 4.0mm is taken as an example, the welding rod is baked for 1 hour at 350 ℃ before the welding test, direct current reverse connection is adopted, the welding current is 150-160A, the inter-road temperature is not more than 100 ℃, and chemical composition analysis (shown in table 1) and mechanical property test (shown in table 2) of deposited metal are carried out according to the standard regulations of national standard GB/T5118-2012 and AWS A5.5.
TABLE 1 deposited Metal chemical composition in examples 1 to 9 (wt%)
TABLE 2 mechanical properties of deposited metals in examples 1 to 9
Therefore, the all-position welding rod prepared by the invention has good welding manufacturability, reasonable metal components of the welding line and stable mechanical property, and can be used for welding high manganese austenite low-temperature steel.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (5)
1. The electric welding rod with the seamless welding core for the high-manganese austenitic low-temperature steel is characterized by comprising a welding core and a flux coating, wherein the welding core comprises a flux core and a coating, the flux core accounts for 34-35% of the total weight of the welding core, and the flux core comprises the following components in percentage by weight: 90-96% of metal manganese powder, 1-3% of graphite, 1-3% of potassium carbonate, 0-2% of potassium titanate and the balance of reduced iron powder;
the coating comprises the following components in percentage by weight: 27-33% of marble, 4-11% of barium carbonate, 20-24% of fluorite, 1-3% of rutile, 3-7% of aluminum oxide, 1-3% of quartz, 1-3% of dehydrated mica, 1-2% of CMC, 7-12% of 45# ferrosilicon, 3-8% of metallic nickel powder, 5-10% of metallic chromium powder, 3-8% of metallic molybdenum powder and 0-1% of chromium nitride.
2. The welding electrode for a high manganese austenitic low temperature steel with a seamless core according to claim 1, characterized in that the skin is a low carbon steel strip comprising the following chemical composition in mass fraction: 0.1-0.4% of Mn, less than or equal to 0.10% of C, less than or equal to 0.020% of Si, less than or equal to 0.010% of S, less than or equal to 0.010% of P, less than or equal to 0.005% of O, and less than or equal to 0.005% of N.
3. The welding electrode for high manganese austenitic low temperature steel with seamless core wire according to claim 1, characterized in that the metal manganese powder comprises the following chemical components in mass fraction: the graphite comprises more than or equal to 97.0 percent of Mn, less than or equal to 0.05 percent of C, less than or equal to 0.02 percent of S and less than or equal to 0.03 percent of P, and the graphite comprises the following chemical components in percentage by mass: the content of C is more than or equal to 95%, the content of S is less than or equal to 0.10%, the content of P is less than or equal to 0.010%, and the potassium carbonate comprises the following chemical components in percentage by mass: k2CO3More than or equal to 98.0 percent, less than or equal to 0.02 percent of S, less than or equal to 0.02 percent of P, wherein the potassium titanate comprises the following chemical components in percentage by mass: 30-35% of Na2O+K250-59% of O, TiO2，S≤0.02%，P≤0.02%。
4. The method of making an electrode for a high manganese austenitic low temperature steel with seamless core wire according to claim 2, comprising the steps of:
(1) weighing the components in the flux core as required, baking potassium carbonate and potassium titanate at the high temperature of 440-460 ℃, preserving heat for 0.8-1.2 h, and removing water;
(2) mixing the treated potassium carbonate and potassium titanate with other components in the drug core, and keeping the temperature at 110-130 ℃ after mixing the powder to prevent the potassium carbonate and potassium titanate from absorbing moisture again to prepare drug core powder;
(3) weighing the components in the coating according to the requirements, mixing and stirring uniformly to obtain dry powder, adding pure sodium silicate with the weight being 24-30% of the total weight of the dry powder into the dry powder, and mixing and stirring;
(4) pressing the skin of the low-carbon steel strip into a U shape by a rolling unit, synchronously adding the flux-cored powder into the skin on line, closing the skin after the flux-cored powder is added into a flux-cored wire blank with an O-shaped section under the rolling of a forming roll, welding the flux-cored wire blank at the closed position by adopting high-frequency welding to enable the seamed pipe to become a seamless pipe, and then drawing and reducing the seamless pipe one by one to prepare a seamless welding core;
(5) and (4) manufacturing the seamless welding core and the coating into the welding rod on the conventional welding rod production equipment.
5. The method of claim 4, wherein the sodium silicate has a modulus of 3.2 and a density of 1.40-1.45 g/mm3And a baume degree of 43.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910877603.2A CN110682027B (en) | 2019-09-17 | 2019-09-17 | Electric welding rod with seamless welding core for high-manganese austenite low-temperature steel and preparation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910877603.2A CN110682027B (en) | 2019-09-17 | 2019-09-17 | Electric welding rod with seamless welding core for high-manganese austenite low-temperature steel and preparation method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110682027A CN110682027A (en) | 2020-01-14 |
| CN110682027B true CN110682027B (en) | 2021-04-02 |
Family
ID=69109288
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910877603.2A Active CN110682027B (en) | 2019-09-17 | 2019-09-17 | Electric welding rod with seamless welding core for high-manganese austenite low-temperature steel and preparation method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110682027B (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111660035B (en) * | 2020-05-07 | 2022-04-19 | 中国船舶重工集团公司第七二五研究所 | Tungsten electrode argon arc seamless flux-cored wire for ultralow-temperature high-manganese steel welding and preparation method thereof |
| CN111660036B (en) * | 2020-05-21 | 2021-10-01 | 中国船舶重工集团公司第七二五研究所 | Low-apparent-density metal powder core seamless flux-cored wire |
| CN112222670B (en) * | 2020-10-12 | 2022-02-15 | 广州鑫钻新材料科技开发有限公司 | High-wear-resistance flux-cored welding electrode and preparation method thereof |
| CN112658532B (en) * | 2020-12-11 | 2022-07-12 | 四川大西洋焊接材料股份有限公司 | Coating of austenitic stainless steel welding rod, preparation method and application |
| CN113547254B (en) * | 2021-07-20 | 2022-09-06 | 武汉铁锚焊接材料股份有限公司 | Arc welding electrode for ultralow-temperature high-manganese steel |
| CN114161022A (en) * | 2022-01-12 | 2022-03-11 | 中国华能集团有限公司 | Novel high-temperature alloy flux-cored welding rod |
| CN115625450B (en) * | 2022-10-28 | 2024-06-18 | 山东大学 | High manganese type austenitic welding rod for welding Fe-Mn-Al low temperature steel and preparation thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101898284A (en) * | 2010-07-14 | 2010-12-01 | 中国船舶重工集团公司第七二五研究所 | Surfacing electrode for repairing hot forged mould |
| CN101920407A (en) * | 2010-05-16 | 2010-12-22 | 十堰金科化工有限公司 | Novel alloy tool steel welding electrode |
| CN102990245A (en) * | 2012-10-29 | 2013-03-27 | 海门市金易焊接材料有限公司 | Solder wire with high content of manganese powder and preparation method thereof |
| CN108907504A (en) * | 2018-09-05 | 2018-11-30 | 南京钢铁股份有限公司 | A kind of metal powder-cored wire and welding method suitable for ultralow temperature potassium steel |
| CN110125572A (en) * | 2019-05-30 | 2019-08-16 | 洛阳双瑞特种合金材料有限公司 | It is a kind of can post weld heat treatment seamless submerged arc flux-cored wire |
| CN110153586A (en) * | 2019-05-27 | 2019-08-23 | 洛阳双瑞特种合金材料有限公司 | A kind of core wire is ultralow-hydrogen low, the welding rod of resistance to moisture absorption the and the preparation method of seamless flux-cored wire |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6710301B2 (en) * | 2001-07-19 | 2004-03-23 | Nippon Welding Rod Co., Ltd. | Flux-contained welding wire |
-
2019
- 2019-09-17 CN CN201910877603.2A patent/CN110682027B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101920407A (en) * | 2010-05-16 | 2010-12-22 | 十堰金科化工有限公司 | Novel alloy tool steel welding electrode |
| CN101898284A (en) * | 2010-07-14 | 2010-12-01 | 中国船舶重工集团公司第七二五研究所 | Surfacing electrode for repairing hot forged mould |
| CN102990245A (en) * | 2012-10-29 | 2013-03-27 | 海门市金易焊接材料有限公司 | Solder wire with high content of manganese powder and preparation method thereof |
| CN108907504A (en) * | 2018-09-05 | 2018-11-30 | 南京钢铁股份有限公司 | A kind of metal powder-cored wire and welding method suitable for ultralow temperature potassium steel |
| CN110153586A (en) * | 2019-05-27 | 2019-08-23 | 洛阳双瑞特种合金材料有限公司 | A kind of core wire is ultralow-hydrogen low, the welding rod of resistance to moisture absorption the and the preparation method of seamless flux-cored wire |
| CN110125572A (en) * | 2019-05-30 | 2019-08-16 | 洛阳双瑞特种合金材料有限公司 | It is a kind of can post weld heat treatment seamless submerged arc flux-cored wire |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110682027A (en) | 2020-01-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110682027B (en) | Electric welding rod with seamless welding core for high-manganese austenite low-temperature steel and preparation method | |
| CN107442968B (en) | Welding rod for welding nickel-based alloy or Ni9% steel and production method thereof | |
| CN102500951B (en) | Nickel-based welding electrode matched with 9Ni steel | |
| CN102430876B (en) | Nickel-based welding electrode for welding nickel-chromium-molybdenum alloy | |
| CN111618480B (en) | AC/DC dual-purpose high-manganese austenite ultralow-temperature welding rod | |
| CN111618479B (en) | Welding rod for 5% Ni steel and preparation method thereof | |
| CN106077993A (en) | The welding point of pole low-temperature steel and for manufacturing the welding material of this welding point | |
| CN103008913A (en) | Corrosion-resistance stainless steel electric welding rod used for nuclear power and production method thereof | |
| CN107803608B (en) | Martensite precipitation hardening stainless steel welding rod and preparation method and application thereof | |
| CN111590240B (en) | 9% Ni steel matched nickel-based welding rod special for overhead welding | |
| CN111590239B (en) | Martensite heat-resistant steel welding rod for ultra-supercritical thermal power generating unit and preparation method thereof | |
| CN113714682B (en) | Super duplex stainless steel self-protection flux-cored wire and preparation method thereof | |
| CN108971795A (en) | A kind of high manganese austenite low-temperature steel welding rod | |
| CN104139250A (en) | High-strength high-tenacity electro-gas welding agent core welding wire and preparation method | |
| CN103433642B (en) | Low-hydrogen basic electrode for 1Ni9 low-temperature steel welding and preparation method of low-hydrogen basic electrode | |
| CN106624455A (en) | Ultralow hydrogen high-strength steel welding rod used for welding 100 kg class water-electricity pressure steel pipe and preparing method thereof | |
| CN112975199A (en) | Stainless steel welding rod for improving vertical welding process performance | |
| CN103084758B (en) | Titanium-calcium welding rod | |
| CN110153586B (en) | Ultralow-hydrogen moisture-absorption-resistant welding electrode with seamless flux-cored wire as core wire and preparation method thereof | |
| CN111604615A (en) | High-strength weather-resistant steel gas-shielded flux-cored wire and preparation method thereof | |
| CN109759745B (en) | Welding rod for high-current welding stainless steel pressure container | |
| CN109175781B (en) | Flux-cored wire matched with EH500 steel for ship and ocean engineering | |
| CN110605501B (en) | Low-toxicity nickel-based welding rod for welding Ni-Cr-Mo alloy steel and preparation thereof | |
| CN114905187B (en) | Low-hydrogen type welding rod applicable to austenitic light steel and preparation method | |
| WO2023071294A1 (en) | Heat-resistant steel hand welding rod for ultra-supercritical cb2 steel and preparation method therefor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20210126 Address after: No. 169, Binhe South Road, Luolong District, Luoyang City, Henan Province Applicant after: NO.725 RESEARCH INSTITUTE OF CHINA SHIPBUILDING INDUSTRY Corp. Address before: 471000 No.20, Yanguang Road, high tech Development Zone, Luoyang City, Henan Province Applicant before: LUOYANG SHUANGRUI SPEICAL ALLOY MATERIAL Co.,Ltd. |
|
| GR01 | Patent grant | ||
| GR01 | Patent grant |