CN114749827B - Solid welding wire and preparation method and application thereof - Google Patents
Solid welding wire and preparation method and application thereof Download PDFInfo
- Publication number
- CN114749827B CN114749827B CN202210432620.7A CN202210432620A CN114749827B CN 114749827 B CN114749827 B CN 114749827B CN 202210432620 A CN202210432620 A CN 202210432620A CN 114749827 B CN114749827 B CN 114749827B
- Authority
- CN
- China
- Prior art keywords
- percent
- welding wire
- equal
- 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
- B23K35/22—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
- B23K35/22—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
- B23K35/302—Cu 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
- B23K35/22—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
- B23K35/3033—Ni 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
- B23K35/22—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
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/16—Arc welding or cutting making use of shielding gas
- B23K9/173—Arc welding or cutting making use of shielding gas and of a consumable electrode
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Arc Welding In General (AREA)
Abstract
The invention provides a solid welding wire and a preparation method and application thereof, belonging to the technical field of welding materials. The solid welding wire comprises the following components in percentage by mass: 23.5 to 25%, C:0.45 to 0.55%, si: 1.55-1.80%, cr:2.55 to 3.85%, ni:1.50 to 3.50%, mo:0.1 to 0.8%, cu:0.50 to 1.00%, ca:0.01 to 0.05 percent of the total weight of the alloy, less than or equal to 0.005 percent of P, less than or equal to 0.003 percent of S and the balance of Fe. The solid welding wire provided by the invention is used for consumable electrode gas shielded welding of austenite light steel, and can prevent a welding seam from forming Al 2 O 3 And (4) mixing to obtain a welded joint with excellent mechanical properties.
Description
Technical Field
The invention relates to the technical field of welding materials, in particular to a solid welding wire and a preparation method and application thereof.
Background
As one of the most important structural materials, steel materials play a very important role in rapidly developing national economy. In order to meet the special requirements of the state on high-end field materials, a new generation of steel materials is developing towards the directions of low density, high strength and toughness, energy conservation, emission reduction, high safety and the like. In order to meet the connection technology required by the application of a new generation of steel materials, particularly for Fe-Mn-Al-C series alloy steel which is light and has multiple high performances such as light weight, high plasticity and toughness and the like by adding light-weight element Al (generally more than 5%) to reduce the material density and adding a proper amount of austenite stabilizing elements such as Mn, C and the like, the selection of welding materials and a matched welding method form an indispensable link, gas shielded welding is a common welding method, but at present, a solid welding wire for gas metal arc welding which is suitable for welding the austenite light steel is not available.
The Chinese patent CN 111805120A discloses a consumable electrode solid welding wire for welding ultralow-temperature austenite high-manganese steel, which comprises the following components in percentage by mass: mn: 22-26%, C:0.40 to 0.55%, si: 0.30-0.70%, cr:2.5 to 5.0%, ni: 1.5-4.0%, 1.0-3.0% of Mo, cu:0.20 to 0.90%, V: 0.03-0.20%, P is less than or equal to 0.020%, S is less than or equal to 0.010%, and the balance is Fe and inevitable impurities, although deposited metal formed by the welding wire has high toughness at ultralow temperature and the strength is matched with that of low-temperature austenitic high manganese steel, when the welding wire is used for welding austenitic light steel, al element in a matrix is transited to a welding seam to form Al 2 O 3 The inclusion causes serious reduction of the mechanical property of the welding seam.
Disclosure of Invention
The solid welding wire is used for consumable electrode gas shielded welding of austenitic light steel and can prevent a welding seam from forming Al 2 O 3 And (4) inclusion is carried out, so that a welding head with excellent mechanical property is obtained.
In order to achieve the above object, the present invention provides the following technical solutions:
the invention provides a solid welding wire which comprises the following components in percentage by mass: 23.5 to 25%, C:0.45 to 0.55%, si: 1.55-1.80%, cr:2.55 to 3.85%, ni:1.50 to 3.50%, mo:0.1 to 0.8%, cu:0.50 to 1.00%, ca:0.01 to 0.05 percent of the total weight of the alloy, less than or equal to 0.005 percent of P, less than or equal to 0.003 percent of S and the balance of Fe.
Preferably, the Mn:23.8 to 24.5%, C:0.48 to 0.55%, si:1.58 to 1.75%, cr:2.7 to 3.4%, ni:2.0 to 3.0%, mo:0.3 to 0.5%, cu:0.50 to 0.8%, ca: 0.02-0.05%, P is less than or equal to 0.005%, S is less than or equal to 0.001%, and the balance is Fe.
Preferably, the compound comprises C:0.48%, mn:24%, si:1.62%, ni:2%, cr:3%, cu:0.5%, mo:0.5%, ca:0.02 percent, less than or equal to 0.002 percent of P, less than or equal to 0.001 percent of S and the balance of Fe.
Preferably, the compound comprises C:0.55%, mn:23.8%, si:1.75%, ni:2.3%, cr:2.7%, mo:0.5%, cu:0.7%, ca:0.03 percent, less than or equal to 0.005 percent of P, less than or equal to 0.001 percent of S, and the balance of Fe.
Preferably, the compound comprises C:0.52%, mn:24.5%, si:1.58%, ni:3.0%, cr:3.4%, mo:0.3%, cu:0.8%, ca:0.05 percent, less than or equal to 0.005 percent of P, less than or equal to 0.001 percent of S and the balance of Fe.
The invention provides a preparation method of the solid welding wire in the scheme, which comprises the following steps:
burdening corresponding to the composition of the solid welding wire, and smelting and casting the raw materials to obtain a cast ingot;
forging the cast ingot to obtain a welding wire raw material;
carrying out hot rolling on the welding wire raw material to obtain a wire rod;
annealing and drawing the wire rod to obtain an intermediate welding wire;
and carrying out copper plating on the intermediate welding wire to obtain the solid welding wire.
The invention provides application of the solid welding wire in the scheme or the solid welding wire prepared by the preparation method in the scheme in consumable electrode gas shielded welding of austenitic light steel.
Preferably, the chemical composition of the austenitic light steel comprises, in weight percent: 0.6 to 1.0 percent of C, 22 to 25 percent of Mn, 5 to 8 percent of Al and the balance of Fe; the mechanical properties of the austenitic light steel meet the following requirements: yield strength Rp 0.2 440-500 MPa, tensile strength R m 700-850 MPa, elongation A is more than or equal to 40 percent, and-40 ℃ impact energy KV 2 Not less than 120J; the structure of the austenitic light steel is fully austenitic.
Preferably, the conditions of the gas metal arc welding include: preheating is not needed before welding, and the temperature of the welding seam between layers is less than or equal to 100 DEG CProtective gas of 80% Ar +20% CO in volume fraction 2 The welding current is 200-220A, the welding voltage is 24-26V, the welding speed is 35-40 cm/min, the gas flow is 15-20L/min, and the heat input is 8-10 kJ/cm.
Preferably, the yield strength R of the deposited metal formed after welding eL Greater than or equal to 470MPa, tensile strength R m Not less than 750MPa, elongation A 5 35 to 45 percent and 40 ℃ below zero KV 2 The impact work is 80-110J.
The invention provides a solid welding wire which comprises the following components in percentage by mass: 23.5 to 25%, C:0.45 to 0.55%, si: 1.55-1.80%, cr:2.55 to 3.85%, ni:1.50 to 3.50%, mo:0.1 to 0.8%, cu:0.50 to 1.00%, ca:0.01 to 0.05 percent of the total weight of the alloy, less than or equal to 0.005 percent of P, less than or equal to 0.003 percent of S and the balance of Fe.
The content of the main alloy element Mn adopted by the invention is 23.5-25%, which is equivalent to the manganese content of the parent metal, so that the composition system equivalent to the parent metal matrix is ensured, and the change of the structure and the performance near a fusion line formed by the large diffusion of the manganese element is avoided because of no strong manganese element concentration gradient when a welding joint is formed. Mn, C, ni and Cu in the invention are austenite forming elements, and when the weld metal molten pool is solidified, the Mn, C, ni and Cu are acted together to form weld metal with an austenite structure. The invention adopts Si, ca and Mn for combined deoxidation, and can effectively avoid the oxidation of transitional Al element in the base metal to Al 2 O 3 The performance of the welding line is seriously reduced due to inclusion, and the addition of Ca also has good effect on desulfurization and phosphorus. The invention has proper content of Si element, and ensures that deposited metal has good fluidity and attractive weld joint formation.
The welding wire is convenient for realizing industrialized flow production.
Detailed Description
The invention provides a solid welding wire which comprises the following components in percentage by mass: 23.5 to 25%, C:0.45 to 0.55%, si: 1.55-1.80%, cr:2.55 to 3.85%, ni:1.50 to 3.50%, mo:0.1 to 0.8%, cu:0.50 to 1.00%, ca:0.01 to 0.05 percent of the total weight of the alloy, less than or equal to 0.005 percent of P, less than or equal to 0.003 percent of S and the balance of Fe.
The solid welding wire provided by the invention comprises 23.5-25% of Mn, preferably 23.8-24.5% by mass. In the examples of the present invention, the content of Mn is specifically 23.8%, 24%, or 24.5%. In the invention, mn is an austenite stabilizing element, can expand an austenite phase region and play a role in solid solution strengthening, and in the welding process, the burnt part of Mn is equivalent to the Mn content of the base material, thereby ensuring the component system basically same as the base material. However, as the content of manganese increases, the grains of the formed weld joint become coarse, the thermal conductivity sharply decreases, and the coefficient of linear expansion increases, so that large internal stress is formed during heating or cooling, the cracking tendency is remarkably increased, the hot workability is deteriorated, and the excessive addition is difficult. Therefore, the welding wire of the present invention limits the Mn content to 23.5 to 25%.
The solid welding wire provided by the invention comprises 0.45-0.55% of C, preferably 0.48-0.55% of C by mass percentage. In the embodiment of the invention, the content of the element C is specifically 0.48%, 0.52% or 0.55%. In the invention, C is a very remarkable austenite stabilizing and solid solution strengthening element, the content of C is increased, the austenite phase region can be enlarged, and the strength can be improved. However, too much C forms a brittle phase with Mn, which is detrimental to weld ductility. Therefore, the welding wire of the present invention limits the C content to 0.45 to 0.55%.
The solid welding wire provided by the invention comprises 1.55-1.80% of Si, preferably 1.58-1.75% by mass. In embodiments of the invention, this is specifically 1.62%, 1.75% or 1.58%. In the invention, si is an effective deoxidizing element and a solid solution strengthening element, the content of Si is increased, oxide inclusions in a welding seam can be reduced, and the strength is improved. However, too much Si lowers the solubility of carbon in austenite, increases the number of carbides, and lowers the impact toughness accordingly. Because the gas-shielded welding wire is used for welding high-alloying manganese austenite steel, the low Si content can not ensure that deposited metal has good fluidity and attractive weld formation. Therefore, the present invention limits the Si content to 1.55 to 1.85%.
The solid welding wire comprises, by mass, 2.55-3.85% of Cr, preferably 2.7-3.4%. In embodiments of the invention, the content of Cr is 3%, 2.7% or 3.4%. In the invention, cr can improve the solid solution strengthening effect, ensure good elongation, and increase the Cr content can improve the corrosion resistance and the ductility and toughness. However, excessive Cr tends to increase the amount of network carbide precipitated along the crystal, and conversely, decreases the impact toughness and ductility. Therefore, the present invention limits the Cr content to 2.55 to 3.85%.
The solid welding wire provided by the invention comprises 1.50-3.50% of Ni, preferably 2.0-3.0% of Ni. In the examples of the present invention, the content of Ni is specifically 2%, 2.3%, or 3.0%. In the invention, the addition of Ni can improve the strength of the welding seam, and the Ni is favorable for the welding performance from the perspective of matrix structure, and when high manganese steel is welded, the addition of Ni element can obtain the obdurability matched with the content of Mn, and simultaneously maintain the aesthetic property of welding seam forming. However, when the nickel content is high, low-melting compounds may be formed with impurities (e.g., sulfur) in the weld bead, and the thermal crack sensitivity may be significantly increased. Therefore, the welding wire of the present invention limits the Ni content to 1.5 to 3.5%.
The solid welding wire provided by the invention comprises 0.1-0.8% of Mo, preferably 0.3-0.5% by mass. In the examples of the present invention, the content of Mo is specifically 0.5% or 0.3%. In the present invention, mo can be dissolved in austenite to strengthen the matrix, and at the same time, the high-temperature strength and hardenability are improved, and coarsening of austenite-forming crystal grains can be prevented to stabilize ductility and toughness. However, when the Mo content in the weld exceeds 0.6%, the low-temperature impact toughness is markedly reduced. Therefore, the welding wire of the present invention limits the Mo content to 0.1 to 0.8%.
The solid welding wire provided by the invention comprises 0.50-1.00% of Cu, preferably 0.50-0.8% by mass. In the embodiments of the present invention, the content of Cu is specifically 0.5%, 0.7%, or 0.8%. In the invention, cu can be used as an austenite stabilizing element, and because the gas-shielded welding wire is used for welding high-alloyed manganese-based austenitic steel, the transition of a large amount of Al element in a base metal can reduce the austenite interval and promote the formation of a brittle phase so as to reduce the content of the brittle phaseLow ductility and toughness, and depends on the fact that copper has stronger oxidability than aluminum, thereby protecting Al formed by the transition of aluminum element in the parent metal to welding line 2 O 3 And (4) inclusion. Therefore, the welding wire of the present invention limits the Cu content to 0.5 to 1.0%.
The solid welding wire comprises 0.01-0.05% of Ca by mass percent, and preferably 0.02-0.05% of Ca by mass percent. In embodiments of the invention, specifically 0.02%, 0.03% or 0.05%. Because the welding wire is used for welding high-alloying manganese austenitic steel, the transition of a large amount of Al element in the parent metal can reduce the austenite interval and promote the formation of brittle phase so as to reduce the ductility and toughness, and the Al element formed by the transition of the aluminum element in the parent metal to a welding line is protected by the fact that calcium has stronger oxidability than aluminum 2 O 3 And (4) inclusion. However, too high calcium may combine with aluminum to form Al 2 Ca、Al 4 Ca is included. Therefore, the welding wire of the present invention limits the content of Ca to 0.01 to 0.05%.
The solid welding wire comprises, by mass, not more than 0.005% of P and not more than 0.003% of S.
The solid welding wire provided by the invention further comprises the balance of Fe and inevitable impurity elements.
The invention provides a preparation method of the solid welding wire in the scheme, which comprises the following steps:
burdening corresponding to the composition of the solid welding wire, and smelting and casting the raw materials to obtain a cast ingot;
forging the cast ingot to obtain a welding wire raw material;
carrying out hot rolling on the welding wire raw material to obtain a wire rod;
annealing and drawing the wire rod to obtain an intermediate welding wire;
and carrying out copper plating on the intermediate welding wire to obtain the solid welding wire.
The invention mixes materials corresponding to the composition of the solid welding wire, and smelts and casts the raw materials to obtain the cast ingot. The invention has no special requirements on the smelting process, and the smelting process well known in the field can be adopted. In the invention, the casting temperature is preferably 1500-1600 ℃, demoulding is carried out 30min after casting, and the ingot is obtained by air cooling to room temperature.
After obtaining the ingot, forging the ingot to obtain the raw material of the welding wire. Before forging, the ingot is preferably heated to 1180 +/-20 ℃ and is kept for more than 2 hours, so that the homogenization of the components of the ingot structure is ensured. In the present invention, the open forging temperature is preferably 1100. + -. 30 ℃ and the finish forging temperature is preferably not less than 950 ℃. The invention has no special requirements on the size of the raw material of the welding wire and can be determined according to actual requirements. In an embodiment of the invention, the wire stock is specifically forged to a size of 50 x 1500mm to match the parameters set by the following rolling mill.
After the welding wire raw material is obtained, the welding wire raw material is subjected to hot rolling to obtain a wire rod.
In the invention, the heating temperature of the hot rolling is preferably 1200 +/-20 ℃, the heat preservation time is preferably 1h, the outlet temperature of a rolling high-speed wire is preferably 1050 +/-30 ℃, the spinning temperature is preferably more than or equal to 970 ℃, and the water cooling is carried out on the rolling wire rod, wherein the water inlet temperature is preferably more than or equal to 950 ℃. In the present invention, the diameter of the wire rod is preferably 7.5mm.
After the wire rod is obtained, the wire rod is annealed and drawn to obtain the intermediate welding wire.
The invention has no special requirements on the annealing and drawing process, and the annealing and drawing process known in the field can be adopted. In the present invention, the diameter of the intermediate wire is preferably 1.2mm.
After the intermediate welding wire is obtained, the intermediate welding wire is preferably subjected to copper plating to obtain the solid welding wire. The present invention has no special requirements for the copper plating process, and the copper plating process well known in the art can be adopted. The main component of the welding wire is steel, the bare wire is easy to rust and corrode in the atmosphere, and the shelf life can be effectively prolonged by plating a layer of copper on the surface; and simultaneously, the conductivity can be enhanced. In the present invention, the diameter of the solid wire is preferably 1.2mm.
The invention provides application of the solid welding wire prepared by the scheme or the preparation method of the scheme in consumable electrode gas shielded welding of austenitic light steel.
In the present inventionIn the specification, the chemical composition of the austenitic light steel preferably includes, in weight percent: 0.6 to 1.0 percent of C, 22 to 25 percent of Mn, 5 to 8 percent of Al and the balance of Fe; the mechanical properties of the austenitic light steel meet the following requirements: yield strength Rp 0.2 440-500 MPa, tensile strength R m 700-850 MPa, elongation A is more than or equal to 40 percent, and-40 ℃ impact energy KV 2 Not less than 120J; the structure of the austenitic light steel is fully austenitic.
In the present invention, the conditions of the gas metal arc welding preferably include: preheating is not carried out before welding, the temperature of the welding seam between layers is less than or equal to 100 ℃, and the protective gas accounts for 80 percent of Ar +20 percent of CO in volume fraction 2 The welding current is 200-220A, the welding voltage is 24-26V, the welding speed is 35-40 cm/min, the gas flow is 15-20L/min, and the heat input is 8-10 kJ/cm.
In the invention, the deposited metal formed after welding has good mechanical property and yield strength R eL Greater than or equal to 470MPa, tensile strength R m Not less than 750MPa, elongation A 5 35 to 45 percent and 40 ℃ below zero KV 2 The impact work is 80-110J.
The solid welding wire and the preparation method and application thereof provided by the present invention will be described in detail with reference to the following examples, but they should not be construed as limiting the scope of the present invention.
Example 1
1) Smelting and casting: smelting in a vacuum induction furnace, proportioning and charging according to the components in the table 1, casting molten steel into a round ingot, controlling the casting temperature of the molten steel to 1520 ℃, demoulding after casting for 30min, and cooling in air to room temperature to obtain the ingot.
2) Forging: forging the cast ingot obtained in the step 1), heating to 1180 ℃, preserving heat for more than 2h to ensure that the component tissues of the cast ingot are homogenized, wherein the starting forging temperature is 1100 ℃, the final forging temperature is 940 ℃, and forging into a welding wire raw material with the size of 50 x 1550 mm.
3) Hot rolling: hot rolling the welding wire raw material obtained in the step 2) into a wire rod with the diameter of 7.5mm, wherein the hot rolling process parameters are as follows: heating at 1200 deg.C, maintaining for 1h, rolling at 1050 deg.C, spinning at 975 deg.C, cooling with water at 955 deg.C to obtain 7.5mm diameter wire rod.
4) Annealing and drawing: annealing and drawing the wire rod obtained in the step 3) to prepare an intermediate welding wire with the diameter of 1.2mm.
5) Copper plating: and (3) plating copper on the surface of the welding wire with the diameter of 1.2mm obtained in the step 4), and finally obtaining the finished product gas-shielded welding wire with the diameter of 1.2mm by respectively passing the welding wire through an alkali washing and scrubbing tank, an acid washing and rinsing tank, a copper plating tank, a water washing and neutralizing tank and a hot water washing tank.
Example 2
1) Smelting and casting: smelting in a vacuum induction furnace, proportioning and charging according to the components in the table 1, casting molten steel into round ingots, wherein the casting temperature of the molten steel is 1550 ℃, demoulding after casting for 30min, and air cooling to room temperature to obtain the ingots.
2) Forging: forging the ingot obtained in the step 1), heating to 1180 ℃, preserving heat for more than 2 hours, ensuring the homogenization of the component structure of the ingot, and forging into a welding wire raw material with the size of 50 x 1550mm at the starting forging temperature of 1100 ℃ and the final forging temperature of 945 ℃.
3) Hot rolling: hot rolling the welding wire raw material obtained in the step 2) into a wire rod with the diameter of 7.5mm, wherein the hot rolling process parameters are as follows: heating at 1200 deg.C, maintaining for 1h, rolling at 1050 deg.C, spinning at 975 deg.C, cooling with water at 940 deg.C to obtain 7.5mm diameter wire rod.
4) Annealing and drawing: annealing and drawing the wire rod obtained in the step 3) to prepare an intermediate welding wire with the diameter of 1.2mm.
5) Copper plating: and (5) plating copper on the surface of the welding wire with the diameter of 1.2mm obtained in the step 4), and finally obtaining the finished gas-shielded welding wire with the diameter of 1.2mm by respectively passing the welding wire through an alkali washing and scrubbing tank, an acid washing and rinsing tank, a copper plating tank, a water washing and neutralizing tank and a hot water washing tank.
Example 3
1) Smelting and casting: smelting in a vacuum induction furnace, proportioning and charging according to the components in the table 1, casting molten steel into round ingots, wherein the casting temperature of the molten steel is 1500 ℃, demoulding after casting for 30min, and air cooling to room temperature to obtain the ingots.
2) Forging: forging the cast ingot obtained in the step 1), heating to 1180 ℃, preserving heat for more than 2h to ensure homogenization of component tissues of the cast ingot, wherein the starting forging temperature is 1080 ℃, the final forging temperature is 940 ℃, and forging into a welding wire raw material with the size of 50 x 1550 mm.
3) Hot rolling: hot rolling the welding wire raw material obtained in the step 2) into a wire rod with the diameter of 7.5mm, wherein the hot rolling process parameters are as follows: heating at 1200 deg.C, maintaining for 1h, rolling at 1050 deg.C, spinning at 980 deg.C, cooling with water to obtain 7.5mm diameter wire rod.
4) Annealing and drawing: annealing and drawing the wire rod obtained in the step 3) to prepare an intermediate welding wire with the diameter of 1.2mm.
5) Copper plating: and (3) plating copper on the surface of the welding wire with the diameter of 1.2mm obtained in the step 4), and finally obtaining the finished product gas-shielded welding wire with the diameter of 1.2mm by respectively passing the welding wire through an alkali washing and scrubbing tank, an acid washing and rinsing tank, a copper plating tank, a water washing and neutralizing tank and a hot water washing tank.
Comparative example 1
The difference from example 1 is only in the composition of the wire, which is detailed in table 1.
The welding wires of the embodiments 1 to 3 and the comparative example 1 are used for welding the novel austenite light steel with the thickness of 20mm by adopting a semi-automatic argon tungsten-arc welding method, and the austenite light steel comprises the following components: 0.75% of C, 25.5% of Mn and 7.3% of Al, and the mechanical properties are as follows: rp 0.2 Is 475MPa m 815MPa, 43% of A, and KV at-40 DEG C 2 Is 123J.
The test plate groove type of the austenitic light steel is Y-shaped, the single-side groove angle is 30 degrees, the truncated edge is 2mm, preheating is not carried out before welding, the temperature of an interlayer welding line is less than or equal to 100 ℃, the protective gas is 80% Ar +20% CO 2 The welding current is 200-220A, the welding voltage is 24-26V, the welding speed is 35-40 cm/min, the gas flow is 15-20L/min, and the heat input is 8-10 kJ/cm.
The welded weld metal microstructure and mechanical properties were examined, and the results showed that the weld structures in examples 1-3 and comparative example 1 were all austenite, no hot cracks were formed, and the mechanical properties are shown in table 2.
Table 1 composition of welding wire (% by mass) of examples and comparative examples
| Composition (A) | Mn | C | Ni | Si | Cr | Cu | Mo | Ca | P | S |
| Example 1 | 24 | 0.48 | 2 | 1.62 | 3 | 0.5 | 0.5 | 0.02 | ≤0.002 | ≤0.001 |
| Example 2 | 23.8 | 0.55 | 2.3 | 1.75 | 2.7 | 0.7 | 0.5 | 0.03 | ≤0.005 | ≤0.001 |
| Example 3 | 24.5 | 0.52 | 3.0 | 1.58 | 3.4 | 0.8 | 0.3 | 0.05 | ≤0.005 | ≤0.001 |
| Comparative example 1 | 24 | 0.50 | 3.0 | 0.45 | 3.0 | 0.8 | 0.5 | 0.004 | ≤0.005 | ≤0.001 |
TABLE 2 mechanical Properties of the examples and comparative examples
| Numbering | Yield strength/MPa | Tensile strength/MPa | Elongation/percent | -40℃KV 2 /J |
| Example 1 | 478 | 765 | 42 | 107 |
| Example 2 | 483 | 792 | 35 | 95 |
| Example 3 | 465 | 802 | 35 | 105 |
| Comparative example 1 | 412 | 704 | 28 | 55 |
From the results of Table 2, it is understood that comparative example 1, which is not within the scope of the present invention due to its low silicon content, is inferior in fluidity and deoxidation effect of the deposited metal at the time of welding, resulting in poor weld formation and the presence of a large amount of Al 2 O 3 And impurities are mixed, so that the strength and the plasticity and toughness of the welding joint are seriously reduced.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. A solid welding wire is characterized by comprising, by mass: 23.5 to 25%, C:0.45 to 0.55%, si: 1.55-1.80%, cr:2.55 to 3.85%, ni:1.50 to 3.50%, mo:0.1 to 0.8%, cu:0.50 to 1.00%, ca:0.01 to 0.05 percent of the total weight of the alloy, less than or equal to 0.005 percent of P, less than or equal to 0.003 percent of S and the balance of Fe.
2. The solid welding wire of claim 1, comprising Mn:23.8 to 24.5%, C:0.48 to 0.55%, si:1.58 to 1.75 percent, cr:2.7 to 3.4%, ni:2.0 to 3.0%, mo:0.3 to 0.5%, cu:0.50 to 0.8%, ca: 0.02-0.05%, P is less than or equal to 0.005%, S is less than or equal to 0.001%, and the balance is Fe.
3. The solid welding wire of claim 1, comprising C:0.48%, mn:24%, si:1.62%, ni:2%, cr:3%, cu:0.5%, mo:0.5%, ca:0.02 percent, less than or equal to 0.002 percent of P, less than or equal to 0.001 percent of S and the balance of Fe.
4. The solid welding wire of claim 1, comprising C:0.55%, mn:23.8%, si:1.75%, ni:2.3%, cr:2.7%, mo:0.5%, cu:0.7%, ca:0.03 percent, less than or equal to 0.005 percent of P, less than or equal to 0.001 percent of S and the balance of Fe.
5. The solid welding wire of claim 1, comprising C:0.52%, mn:24.5%, si:1.58%, ni:3.0%, cr:3.4%, mo:0.3%, cu:0.8%, ca:0.05 percent, less than or equal to 0.005 percent of P, less than or equal to 0.001 percent of S and the balance of Fe.
6. The method for preparing the solid welding wire of any one of claims 1 to 5, comprising the steps of:
burdening corresponding to the composition of the solid welding wire, and smelting and casting the raw materials to obtain a cast ingot;
forging the cast ingot to obtain a welding wire raw material;
carrying out hot rolling on the welding wire raw material to obtain a wire rod;
annealing and drawing the wire rod to obtain an intermediate welding wire;
and carrying out copper plating on the intermediate welding wire to obtain the solid welding wire.
7. The solid welding wire of any one of claims 1 to 5 or the solid welding wire prepared by the preparation method of claim 6 is applied to consumable electrode gas shielded welding of austenitic light steel.
8. Use according to claim 7, characterized in that the chemical composition of the austenitic light steel comprises, in percentages by weight: 0.6 to 1.0 percent of C, 22 to 25 percent of Mn, 5 to 8 percent of Al and the balance of Fe; the mechanical properties of the austenitic light steel meet the following requirements: yield strength Rp 0.2 440-500 MPa, tensile strength R m 700-850 MPa, elongation A is more than or equal to 40 percent, and-40 ℃ impact energy KV 2 Not less than 120J; the structure of the austenitic light steel is fully austenitic.
9. According to the claimThe use of claim 7 or 8, wherein the conditions of the gas metal arc welding comprise: not preheated before welding, the inter-layer weld seam temperature is less than or equal to 100 ℃, the protective gas is 80% Ar +20% 2 The welding current is 200-220A, the welding voltage is 24-26V, the welding speed is 35-40 cm/min, the gas flow is 15-20L/min, and the heat input is 8-10 kJ/cm.
10. Use according to claim 9, characterised in that the yield strength R of the deposited metal formed after welding eL Greater than or equal to 470MPa, tensile strength R m Not less than 750MPa, elongation A 5 35 to 45 percent and 40 ℃ below zero KV 2 The impact work is 80-110J.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210432620.7A CN114749827B (en) | 2022-04-24 | 2022-04-24 | Solid welding wire and preparation method and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210432620.7A CN114749827B (en) | 2022-04-24 | 2022-04-24 | Solid welding wire and preparation method and application thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114749827A CN114749827A (en) | 2022-07-15 |
| CN114749827B true CN114749827B (en) | 2022-12-20 |
Family
ID=82332788
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210432620.7A Active CN114749827B (en) | 2022-04-24 | 2022-04-24 | Solid welding wire and preparation method and application thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114749827B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116586818B (en) * | 2023-07-17 | 2023-10-13 | 成都先进金属材料产业技术研究院股份有限公司 | Solid welding wire for low-pressure hydrogen-doped gas conveying pipeline and preparation method thereof |
| CN117300435A (en) * | 2023-10-19 | 2023-12-29 | 南京钢铁股份有限公司 | High manganese steel wire rod for welding, preparation method, welding rod and welding wire |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105014189A (en) * | 2015-07-09 | 2015-11-04 | 武汉钢铁(集团)公司 | Shielded metal arc welding method for high-manganese non-magnetic steel with tensile strength of 1000 MPa |
| CN110961822A (en) * | 2018-10-01 | 2020-04-07 | 林肯环球股份有限公司 | Additive manufacturing using aluminum-containing welding wire |
| CN111805120A (en) * | 2020-07-31 | 2020-10-23 | 天津市永昌焊丝有限公司 | Consumable electrode solid welding wire for welding extremely-low-temperature austenite high-manganese steel |
| CN111876680A (en) * | 2020-07-20 | 2020-11-03 | 哈尔滨焊接研究院有限公司 | Low-nickel nitrogen-containing austenitic stainless steel non-consumable electrode gas protection welding wire and preparation method thereof |
| WO2021261067A1 (en) * | 2020-06-24 | 2021-12-30 | 国立研究開発法人物質・材料研究機構 | WELDED STRUCTURE AND Fe-Mn-Cr-Ni-Si-BASED ALLOY |
| CN114227063A (en) * | 2021-12-23 | 2022-03-25 | 锦州公略焊接技术有限公司 | Welding wire for submerged arc welding, welding flux and preparation method thereof, submerged arc welding material and application thereof, welding joint and welding method |
| CN114289929A (en) * | 2022-01-30 | 2022-04-08 | 武汉科技大学 | MIG welding solid welding wire for high-manganese austenite low-temperature steel and welding process thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11420296B2 (en) * | 2020-09-17 | 2022-08-23 | Te-Fu FANG | Welding filler wire for fusion welding precipitation-hardened austenitic Fe—Mn—Al—C alloys |
-
2022
- 2022-04-24 CN CN202210432620.7A patent/CN114749827B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105014189A (en) * | 2015-07-09 | 2015-11-04 | 武汉钢铁(集团)公司 | Shielded metal arc welding method for high-manganese non-magnetic steel with tensile strength of 1000 MPa |
| CN110961822A (en) * | 2018-10-01 | 2020-04-07 | 林肯环球股份有限公司 | Additive manufacturing using aluminum-containing welding wire |
| WO2021261067A1 (en) * | 2020-06-24 | 2021-12-30 | 国立研究開発法人物質・材料研究機構 | WELDED STRUCTURE AND Fe-Mn-Cr-Ni-Si-BASED ALLOY |
| CN111876680A (en) * | 2020-07-20 | 2020-11-03 | 哈尔滨焊接研究院有限公司 | Low-nickel nitrogen-containing austenitic stainless steel non-consumable electrode gas protection welding wire and preparation method thereof |
| CN111805120A (en) * | 2020-07-31 | 2020-10-23 | 天津市永昌焊丝有限公司 | Consumable electrode solid welding wire for welding extremely-low-temperature austenite high-manganese steel |
| CN114227063A (en) * | 2021-12-23 | 2022-03-25 | 锦州公略焊接技术有限公司 | Welding wire for submerged arc welding, welding flux and preparation method thereof, submerged arc welding material and application thereof, welding joint and welding method |
| CN114289929A (en) * | 2022-01-30 | 2022-04-08 | 武汉科技大学 | MIG welding solid welding wire for high-manganese austenite low-temperature steel and welding process thereof |
Non-Patent Citations (2)
| Title |
|---|
| Fe-Mn-Al-C低密度高强钢焊接技术的研究与进展;万亚雄，唐立志，武学俊，章小峰，张朋彦，黄贞益，;《焊接》;20200830;全文 * |
| Fe-Mn-Al-C系低密度钢焊接性能研究;胡士廉，马良超，马冰，田雨江，韦航标，周红凯;《兵器材料科学与工程》;20180830;全文 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114749827A (en) | 2022-07-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN114749827B (en) | Solid welding wire and preparation method and application thereof | |
| JP4660315B2 (en) | Manufacturing method of thick high strength steel plate with excellent toughness and thick high strength steel plate with excellent toughness | |
| CN101954548B (en) | Ultra-low-carbon rare earth stainless steel welding wire and preparation method thereof | |
| JP5267048B2 (en) | Manufacturing method of thick steel plate with excellent weldability and ductility in the thickness direction | |
| CN110172644B (en) | High-strength steel wire for electric arc additive manufacturing and preparation method thereof | |
| WO2018199145A1 (en) | HIGH-Mn STEEL AND PRODUCTION METHOD THEREFOR | |
| JP5088244B2 (en) | Stainless steel welded joint weld metal | |
| JP6245352B2 (en) | High-tensile steel plate and manufacturing method thereof | |
| CN114101969B (en) | Nuclear-grade nickel-chromium-iron alloy welding wire and preparation method and application thereof | |
| CN113319469A (en) | High-strength heat-resistant steel gas shielded welding wire and preparation method thereof | |
| CN112719692B (en) | 900 MPa-grade high-strength steel gas shielded solid welding wire and preparation method thereof | |
| KR101971772B1 (en) | Method of manufacturing steel plate for high-heat input welding | |
| JP3546308B2 (en) | Large heat input welding steel | |
| JP4237904B2 (en) | Ferritic heat resistant steel sheet with excellent creep strength and toughness of base metal and welded joint and method for producing the same | |
| US20240058900A1 (en) | Wire rod for gas shielded welding wire and welding wire | |
| KR101949025B1 (en) | Cold rolled steel sheet for flux cored wire and method of manufacturing the same | |
| JP5008879B2 (en) | High strength steel plate with excellent strength and low temperature toughness and method for producing high strength steel plate | |
| JP4144123B2 (en) | Non-tempered high-tensile steel with excellent base material and weld heat-affected zone toughness | |
| JP5088245B2 (en) | Stainless steel welded joint weld metal | |
| JP4539100B2 (en) | Super high heat input welded heat affected zone | |
| JPS59226151A (en) | Austenitic high-alloy stainless steel with superior weldability and hot workability | |
| JP4144121B2 (en) | Non-tempered high strength steel with excellent toughness of base metal and weld heat affected zone | |
| CN112575252A (en) | Economical high-crack-sensitivity high-strength steel plate and preparation method thereof | |
| JP2017002349A (en) | High tensile steel plate and production method thereof | |
| CN114799611B (en) | High-strength welding wire with 1300 MPa-grade yield strength and wire rod |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |