CN110625297A - Preparation method of high-strength and high-toughness steel welding wire containing nano particles - Google Patents
Preparation method of high-strength and high-toughness steel welding wire containing nano particles Download PDFInfo
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- CN110625297A CN110625297A CN201910887231.1A CN201910887231A CN110625297A CN 110625297 A CN110625297 A CN 110625297A CN 201910887231 A CN201910887231 A CN 201910887231A CN 110625297 A CN110625297 A CN 110625297A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/02—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape
- B23K35/0255—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape for use in welding
- B23K35/0261—Rods, electrodes, wires
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/24—Selection of soldering or welding materials proper
- B23K35/30—Selection of soldering or welding materials proper with the principal constituent melting at less than 1550 degrees C
- B23K35/3053—Fe as the principal constituent
- B23K35/3066—Fe as the principal constituent with Ni 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
Abstract
A preparation method of a high-strength and high-toughness steel welding wire containing nano-particles belongs to the field of material processing. The method comprises the steps of controlling elements forming nanoparticles in a welding wire cast ingot, forging and rolling the welding wire cast ingot, drawing a welding wire coil rod and analyzing the morphology of the nanoparticles in the welding wire coil rod. The contents of Ti and O in the molten steel are strictly controlled, so that the Ti and the O form nano-scale particles in a welding wire ingot. Ti is added in a filamentous form with the diameter of 1mm, and the feeding amount of the filaments is 25-30 mm/Kg. After annealing, the welding wire ingot is forged at 1100-1150 ℃, and then is rolled for 17-20 times at 1000-1050 ℃ to be processed into wire rods with the diameters of 5.0mm and 8.0 mm. The two wire rods are drawn to a 1.2mm welding wire with different surface shrinkage rates in combination with an intermediate annealing process. According to the invention, a considerable amount of nanoparticles mainly containing Ti oxide can be produced in the high-toughness welding wire, and the nanoparticles are introduced into weld metal in the welding process, so that the mechanical property of the weld is improved by using the reinforcing effect of the nanoparticles as a second phase.
Description
Technical Field
The invention belongs to the field of steel materials, and relates to a high-strength and high-toughness steel welding wire containing nano particles. Specifically, Ti-enriched nano-particles are formed in the welding wire by accurately controlling the chemical components of the welding wire steel in the smelting process.
Background
The high-strength and high-toughness steel has tensile strength of over 800MPa, high plasticity and impact toughness and excellent toughness and toughness, and is widely applied to various engineering structures. The welding of high-strength ductile steel usually adopts the argon arc welding technology of filler wire, for low-alloy high-strength ductile steel, because its higher carbon equivalent, the welding degree of difficulty is great, can produce many welding defects in the welding process, and because the cooling rate of the welding molten pool is great, so produce the quench-hardening phase very easily in the welding seam, lead to the toughness of welded joint not enough, this has restricted the application of high-strength ductile steel in the welded structure to a certain extent. In order to improve the overall mechanical properties of the welded joint, many solutions have been proposed, such as pre-and post-weld heat treatment of the weld, the use of austenitic matrix steel welding materials, or the use of welding materials with nanoparticle coatings. The above-described methods all increase the cost of the overall welded structure and reduce the welding efficiency. The welding process is carried out by coating the nanoparticles on the welding material, so as to utilize heterogeneous nucleation of the nanoparticles in the weld, reduce nucleation in the solidification process, and achieve the effect of refining the grain structure of the weld, as described in M.Fattahi, N.Nabhani, M.R.Vaezi, E.Rahimi, Improvement of impact resistance of AWS E6010 world metal by addition of TiO2nanoparticles to the electrode coating, Materials Science and Engineering: A, Volume 528, Issue 27,2011, Pages 8031-. From the viewpoint of grain refinement, the grain size of the weld joint refined by the nanometer second phase can simultaneously improve the strength and toughness of the weld joint metal, because the smaller the grain size, the more interfaces in the metal structure are, in this case, the movement of dislocation is hindered, the strength is improved, and the grain boundary of the grains can also favorably hinder the crack propagation, thereby achieving the purpose of toughening.
On the other hand, from the perspective of precipitation strengthening, the nanophase dispersed in the steel material can pin the grain boundary to inhibit the coarsening of the crystal grains at high temperature, and also has the effect of refining the crystal grains, thereby improving the strength and toughness of the weld joint. At present, the means for strengthening the nanometer second phase in the welding seam are mostly concentrated in the welding process without adding welding materials, such as pressure welding or electron beam welding, and the like, such as electron beam welding. See Yingjie Yan, Yu Yan, Yang He, Jinxu Li, Yanjing Su, Lijie Qiao, Hydrogen-induced cracking mechanism of prediction structural diagnosis stage weight, International Journal of Hydrogen Energy, Volume 40, Issue 5,2015, Pages 2404. 2414. In the welding process without adding welding materials, the weld metal is obtained from the original parent metal after welding thermal cycle, the nano particles in the weld metal are converted from the original parent metal, and the formation of the nano particles in the weld metal is also established on the basis of the original components of the parent metal. In the case of a welding process in which a welding material is filled, such as arc welding, the weld metal is mainly deposited from the welding material, so that the formation of nanoparticles in the weld is not limited by the base metal, but is basically obtained after the welding wire is melted. The nanoparticles in the welding wire can prevent the coarsening of the metal crystal grains of the welding seam in the welding process, regulate and control the structure and effectively improve the mechanical property of the high-strength ductile steel arc welding seam metal.
Disclosure of Invention
In view of the background, the invention aims to prepare a welding wire for high-toughness steel with nano particles, and solve the problem of insufficient toughness of a welding joint of the high-toughness steel. In the present invention, the nanoparticles are formed in situ during solidification of the wire steel, rather than being added externally during preparation.
The preparation method of the high-strength and high-toughness steel welding wire containing the nano particles is characterized by comprising the following steps of:
(1) preparing a high-strength and high-toughness welding wire steel ingot with nano particles;
(2) hot processing of the welding wire cast ingot;
(3) drawing a welding wire rod;
(4) and (4) analyzing the microstructure and the nanoparticle morphology of the wire rod.
Further, the welding wire comprises the following components in percentage by mass: c: 0.03-0.06%; si: 0.4-0.6%; mn:0.9 to 1.2 percent; cr: 0.4-0.6%; ni:2.5 to 4.5 percent; mo: 0.6-1.2%; ti: 0.02-0.04%; cu: less than or equal to 0.02 percent; o: 40-60 ppm. The balance being Fe.
Further, in the smelting process of the welding wire ingot casting in the step (1), C, Ni, Cr, Mo and Fe alloy is firstly melted, the vacuum degree is kept to be less than or equal to 50Pa, and the alloy is refined for 10-15min at the temperature of 1560-.
Further, in the smelting process of the welding wire ingot in the step (1), Ti is added into the welding wire steel solution in a wire-shaped form with the diameter of 1-2mm through a wire feeding device, and the wire feeding amount is 25-30 mm/Kg.
Further, when the Ti wires are sent into the molten steel, the boiling state of the molten steel is kept, the temperature is kept at 1600-.
Further, after the Ti wire is added in the step (1), adding Si, Mn and Cu into the molten steel, vacuumizing to less than or equal to 50Pa, and filling nitrogen gas of 0.1-0.5MPa into the vacuum furnace.
Further, in the step (2), the hot processing of the welding wire ingot is carried out at the initial rolling temperature of 1000-1050 ℃, 17-20 rolling passes are carried out in total, 6-8 rough rolling passes, 4-5 intermediate rolling passes and 7 finish rolling passes are carried out, and the cooling speed is controlled to be 0.8-1.0 ℃/s through air cooling.
Further, in the step (3), the wire rod with the diameter of 5.0mm and 8.0mm is drawn to the diameter of 3.6-4.0mm and 5.4-6.0mm, and then the wire rod is subjected to drawing and intermediate annealing processes for 9-12 times with the same surface shrinkage rate of 17-30% until the diameter of the welding wire is 1.2 mm.
Further, analyzing the microstructure and the form of the nanoparticles, wherein in the step (4), the nanoparticles in the wire rod are Ti oxides; the welding wire in the wire rod is not transformed in the post-rolling and drawing processes, and nanoparticles are further separated out in the annealing process; the size distribution of the nano particles is in the range of 30-100 nm.
The specific preparation method of the welding wire with nano-particles and high toughness comprises the following steps
(1) Preparation of nano-particle high-strength and high-toughness welding wire steel ingot
(1a) A high-strength and high-toughness steel welding wire cast ingot with nano particles comprises the following components in percentage by mass: c: 0.03-0.06%; si: 0.4-0.6%; mn:0.9 to 1.2 percent; cr: 0.4-0.6%; ni:2.5 to 4.5 percent; mo: 0.6-1.2%; ti: 0.02-0.04%; cu: less than or equal to 0.02 percent; o: 40-60ppm, and the balance Fe. The impurity elements in the welding wire are controlled in the following range: s, P and H are less than or equal to 50 ppm. The purity of each metal is required to be more than 99.9 percent, wherein the purity of Ti is more than 99.99 percent, and the metal wire with the diameter of 1-2mm is prepared. And preparing a welding wire alloy according to the content of each element, and drying for later use.
(1b) A welding wire ingot with nano particles is cast by a vacuum smelting furnace, and the vacuum degree is less than or equal to 50 Pa. The casting mold is preheated in a drying furnace for 120-180 minutes at the temperature of 250-300 ℃.
(1c) Putting the dried C, Ni, Cr, Mo and Fe into a corundum crucible, keeping the vacuum degree less than or equal to 50Pa, increasing the power to melt the alloy, and keeping the temperature for refining for 10-15min when the temperature is raised to 1560-1580 ℃.
(1d) Breaking vacuum, adding Ti wire into molten steel by wire feeder with wire feeding amount of 25-30 mm/Kg. At the moment, the molten steel is kept in a flowing state in the electric arc furnace, the temperature is kept at 1600-3O5And (3) granules.
(1e) After wire feeding is finished, adding Si, Mn and Cu into the molten steel by using a secondary feeding device, vacuumizing to less than or equal to 50Pa, filling nitrogen with the pressure of 0.1-0.5MPa, reducing the temperature to 1560-1580 ℃, preserving heat, standing for 20-30 minutes, and then carrying out die casting to obtain the welding wire ingot.
(2) Hot working of solder wire ingots
(2a) Homogenizing the welding wire ingot, annealing the welding wire ingot at the temperature of 900-.
(2b) And forging the welding wire ingot, namely heating the annealed welding wire ingot to 1200-1250 ℃, cooling to 1100-1150 ℃ from a furnace for forging and cogging, forging the ingot into a square ingot with the side length of 18-20cm, and cooling to room temperature in air at the finish forging temperature of 850-900 ℃.
(2c) And rolling the welding wire square ingot at the initial rolling temperature of 1000-1050 ℃, performing 17-20 rolling passes, namely 6-8 rough rolling passes, 4-5 intermediate rolling passes and 7 finish rolling passes, and controlling the cooling speed to be 0.8-1.0 ℃/s through air cooling. The spinning temperature is controlled between 850 ℃ and 880 ℃, and the diameter of the rolled wire rod is 5 +/-0.2 mm or 8 +/-0.5 mm.
(3) Drawing of wire rod
(3a) Annealing the rolled wire rod at the temperature of 900-1000 ℃, cooling the rolled wire rod to the temperature of 550-600 ℃ along with the furnace (the cooling speed is 40-50 ℃/h), taking the wire rod out of the furnace, and cooling the wire rod to room temperature in an air mode, wherein the surface of the wire rod is smooth and cannot have defects such as cracks and ears. The height or depth of the local bulges and depressions on the surface of the wire rod is not more than 0.1 mm.
(3b) Drawing the wire rods for the first time, respectively drawing the wire rods with the two diameter specifications to the diameter of 3.6-4.0mm and the diameter of 5.4-6.0mm, then performing intermediate annealing at the temperature of 660-690 ℃ for 1.5-2h, and then discharging and air cooling to room temperature.
(3c) And (4) repeating the step (3b), carrying out drawing and intermediate annealing processes on the wire rod for 9-12 times, wherein the surface shrinkage rate of each drawing is 17-30%, and the surface shrinkage rate of each drawing is ensured to be the same, and finally obtaining the high-strength and high-toughness steel welding wire with the diameter of 1.2mm and the inside provided with the nano particles through acid washing and surface treatment after drawing.
(4) Microstructure and nanoparticle morphology analysis of wire rod
The welding wire is obtained by multi-pass drawing and intermediate annealing of the wire rod, the annealing temperature is lower than 700 ℃, the shapes of the nano particles in the wire rod cannot be greatly changed in the drawing and intermediate annealing processes, and the annealing process can be beneficial to the precipitation of the nano particles. Therefore, the shape and the size of the nano particles in the welding wire rod can be analyzed by using a scanning electron microscope so as to prove the existence of the nano particles in the welding wire.
In the invention, the key to the preparation of the nano-particles in the welding wire containing the high-toughness steel is the precise control of the microalloy element components in the welding wire components, wherein the main elements forming the nano-phase are Ti and O, and the Ti is added in a filiform form, so that the Ti element and the O in the solution can better form the high-melting-point nano-particles of the Ti. The nano particles in the welding wire steel ingot have certain stability and cannot disappear in the forging, rolling and subsequent drawing processes. Meanwhile, the annealing process of rolling and drawing is beneficial to further precipitation of the nano particles, so that a certain amount of nano particles exist in the final 1.2mm welding wire.
The invention has the advantages that:
1. the preparation method is simple. The method adjusts the adding sequence of various metal elements in a special element supplying mode, controls the content of O in molten steel, and utilizes the addition of Ti wires to generate a certain amount of nano-particles in the welding wire steel, and the nano-particles can be dispersed and separated out in the subsequent hot working of the welding wire steel to further increase the amount of the nano-particles. Compared with the traditional processing technology of the high-strength and high-toughness steel welding wire, the method has the advantages that other working procedures are not added while the nano particles are introduced.
2. The introduction mode of the nano particles adopts an in-situ generation mode in the solidification process, and the nano particles are not introduced by adding nano powder from the outside or coating a welding wire. The nano particles generated in situ have certain high-temperature thermal stability, and in the subsequent welding process, the nano particles can play the roles of heterogeneous nucleation and dispersion strengthening in a welding pool.
3. The applicability is strong. In the actual production, the existing welding wire manufacturing equipment can be used for modification, so that the assembly line production can be realized with lower consumption.
Drawings
Other features, details and advantages of the present invention will become more fully apparent from the following detailed description of the specific embodiments of the invention when taken in conjunction with the accompanying drawings.
FIG. 1 is a drawing of a wire coil and finished wire having a nanophase after hot rolling. (a) A wire rod with a diameter of 8 mm; (b) finished wire with nanoparticles 1.2mm in diameter.
FIG. 2 is a diagram of the shape distribution and energy spectrum analysis of the nanoparticles in the welding wire. (a) (b) the morphological distribution of the nano-particles in the wire; (c) energy spectrum analysis of the nanoparticles at the markers in fig. 2 b.
FIG. 3 is a graph showing the size distribution of nanoparticles inside the wire in the example.
Detailed Description
For better understanding of the technical solutions of the present invention, the following detailed descriptions of the embodiments of the present invention are provided with reference to the accompanying drawings. It is pointed out that the person skilled in the art will readily understand that the following examples are given by way of illustration only and are not intended to limit the invention in any way.
Example (b):
in the embodiment, the preparation method of the high-toughness welding wire with the nano particles comprises the following steps:
(1) preparation of high-strength and high-toughness welding wire steel ingot with nano particles
(1a) A high-strength and high-toughness steel welding wire cast ingot with nano particles comprises the following components in percentage by weight: 0.03-0.05% of C; 0.5 to 0.6 percent of Si; 0.9 to 1.1 percent of Mn; 0.4 to 0.6 percent of Cr; 2.5 to 3.0 percent of Ni; 0.6 to 0.8 percent of Mo; 0.02 to 0.03 percent of Ti; the balance being Fe. The impurity elements in the welding wire are controlled in the following range: s, P is less than or equal to 0.01 percent; h and O are less than or equal to 0.005 percent. The purity of each metal is required to be 99.9% or more, wherein the purity of Ti is 99.99% or more, and Ti is prepared into a wire having a diameter of 1.5 mm. 50kg of welding wire alloy is prepared according to the content of the elements, and is dried for later use.
(1b) A high-strength and high-toughness steel welding wire cast ingot with nano particles is cast by a vacuum smelting furnace, and the vacuum degree is less than or equal to 30 Pa. The casting mould is preheated in a drying furnace for 150 minutes at the preheating temperature of 250 ℃.
(1c) Putting the dried C, Ni, Cr, Mo and Fe into a corundum crucible, keeping the vacuum degree less than or equal to 30Pa, increasing the power to melt the alloy, and keeping the temperature to 1560 ℃ for refining for 10 min.
(1d) Vacuum is broken, and Ti wires are added into molten steel by a wire feeding device, wherein the wire feeding amount is 25 mm/Kg. During the wire feeding process, the molten steel flow is required to be kept, the temperature is kept at 1650 ℃, the Ti wires are melted and then uniformly dispersed in the molten steel, and the molten steel is combined with oxygen in the molten steel to generate nano-grade Ti3O5And (3) granules.
(1e) And after the wire feeding is finished, adding Si and Mn into the crucible by using a secondary feeding device, vacuumizing to be less than or equal to 30Pa, filling nitrogen to 0.5MPa, keeping the temperature to 1560 ℃, standing for 20 minutes, and then carrying out die casting to obtain the cast ingot of the welding wire.
(2) Hot working of solder wire ingots
(2a) Homogenizing the welding wire cast ingot, annealing the welding wire cast ingot at 900 ℃, preserving heat for 4h, cooling to 550 ℃ (the cooling speed is 50 ℃/h) along with the furnace, taking out of the furnace, and air cooling to room temperature.
(2b) And forging the welding wire cast ingot, namely heating the annealed welding wire cast ingot to 1200 ℃, discharging the welding wire cast ingot from a furnace, cooling the welding wire cast ingot to 1100 ℃, forging and cogging the welding wire cast ingot into a square ingot of 18x18x18cm, and cooling the square ingot at the finish forging temperature of 850 ℃ in air.
(2c) And (3) rolling the wire steel at the initial rolling temperature of 1050 ℃, performing 17-pass rolling, namely 6-pass rough rolling, 4-pass intermediate rolling and 7-pass finish rolling, and controlling the cooling speed by air cooling. The spinning temperature is controlled between 850 ℃ and 880 ℃, and the diameter of the rolled wire rod is 8 +/-0.5 mm.
(3) Drawing of wire rod
(3a) Annealing the rolled wire rod at 900 ℃, cooling the wire rod to 550 ℃ along with the furnace (the cooling speed is 50 ℃/h), discharging the wire rod from the furnace, and air-cooling the wire rod to room temperature. The surface of the wire rod should be smooth and free of defects such as cracks, ears, etc. The height or depth of the local bulges and depressions on the surface of the wire rod is not more than 0.1 mm.
(3b) Drawing the wire rod for the first time, drawing the wire rod with the diameter of 8.0mm to the diameter of 6.0mm, then carrying out intermediate annealing treatment on the wire rod, wherein the annealing temperature is 680 ℃, the heat preservation time is 1.5h, and then discharging from a furnace and air cooling to the room temperature.
(3c) And (3b) repeating the step (3b), carrying out drawing and intermediate annealing treatment on the wire rod with the diameter of 6.0mm for 13 times, wherein the surface shrinkage rate of each drawing is 22%, and the surface shrinkage rate of each drawing is ensured to be the same, and finally obtaining the high-strength and high-toughness steel welding wire with the diameter of 1.2mm and nano particles through acid washing and surface treatment after drawing. An 8.0mm wire rod and a 1.2mm finished wire are shown in fig. 1.
(4) Morphology observation and size statistics of nanoparticles in wire rods
And analyzing the nanoparticles in the wire rod by using a field emission scanning electron microscope, wherein the analysis comprises the statistics of the size distribution and the main element composition of the nanoparticles of the wire rod. Fig. 2 shows the shape distribution and energy spectrum analysis of the nanoparticles in the wire rod. Fig. 3 is a distribution diagram of nanophase sizes in wire rods, with the size distribution of nanoparticles primarily in the range of 30-100 nm.
Claims (10)
1. The preparation method of the high-strength and high-toughness steel welding wire containing the nano particles is characterized by comprising the following steps of:
(1) preparing a high-strength and high-toughness welding wire steel ingot with nano particles;
(2) hot processing of the welding wire cast ingot;
(3) drawing a welding wire rod;
(4) and (4) analyzing the microstructure and the nanoparticle morphology of the wire rod.
2. The preparation method of the high-toughness steel welding wire containing the nano-particles as claimed in claim 1, wherein the welding wire comprises the following elements in percentage by mass: c: 0.03-0.06%; si: 0.4-0.6%; mn:0.9 to 1.2 percent; cr: 0.4-0.6%; ni:2.5 to 4.5 percent; mo: 0.6-1.2%; ti: 0.02-0.04%; cu: less than or equal to 0.02 percent; o: 40-60 ppm. The balance being Fe.
3. The preparation method of the high-toughness steel welding wire containing the nano-particles as claimed in claim 1, wherein in the smelting process of the welding wire ingot casting in the step (1), C, Ni, Cr, Mo and Fe alloy is firstly melted, the vacuum degree is kept to be less than or equal to 50Pa, and the heat preservation and refining are carried out for 10-15min at the temperature of 1560-.
4. The preparation method of the high-toughness steel welding wire containing the nano-particles as claimed in claim 1, wherein in the smelting process of the welding wire ingot in the step (1), Ti is added into a steel solution of the welding wire in a filamentous form with the diameter of 1-2mm through a wire feeding device, and the wire feeding amount is 25-30 mm/Kg.
5. The method for preparing the high-toughness steel welding wire containing the nano-particles as claimed in claim 4, wherein the Ti wire is fed into the molten steel while the molten steel is kept in a boiling state, the temperature is kept at 1600-1660 ℃, and the Ti wire is uniformly dispersed and dissolved in the molten steel to form oxide nano-particles with O.
6. The preparation method of the high-toughness steel welding wire containing the nano-particles as claimed in claim 5, wherein in the step (1), after the Ti wire is added, Si, Mn and Cu are added into the molten steel, the molten steel is vacuumized to less than or equal to 50Pa, and nitrogen gas of 0.1-0.5MPa is filled into the vacuum furnace.
7. The preparation method of the high-toughness steel welding wire containing the nano-particles as claimed in claim 1, wherein in the step (2), the initial rolling temperature of the welding wire ingot is between 1000 and 1050 ℃, the hot processing is divided into 6 to 8 rough rolling, 4 to 5 intermediate rolling and 7 finish rolling, and the cooling speed is controlled to be 0.8 to 1.0 ℃/s through air cooling.
8. The method for preparing the high strength and toughness steel welding wire containing the nano particles as claimed in claim 1, wherein the wire rod is drawn in the step (3) by firstly drawing the wire rods with the diameters of 5.0mm and 8.0mm to the diameters of 3.6-4.0mm and 5.4-6.0mm, and then carrying out 9-12 times of drawing and intermediate annealing processes on the wire rods with the same surface shrinkage rate of 17-30% until the diameter of the welding wire is 1.2 mm.
9. The method for preparing the high-toughness steel welding wire containing the nano-particles as claimed in claim 1, wherein the nano-particles in the wire rod of the welding wire in the step (4) are oxides of Ti through analysis of microstructure and nano-particle morphology; the welding wire in the wire rod is not transformed in the post-rolling and drawing processes, and nanoparticles are further separated out in the annealing process; the size distribution of the nano particles is in the range of 30-100 nm.
10. The preparation method of the high-toughness steel welding wire containing the nano-particles as claimed in claim 1 is characterized by comprising the following steps
(1) Preparation of nano-particle high-strength and high-toughness welding wire steel ingot
(1a) A high-strength and high-toughness steel welding wire cast ingot with nano particles comprises the following components in percentage by mass: c: 0.03-0.06%; si: 0.4-0.6%; mn:0.9 to 1.2 percent; cr: 0.4-0.6%; ni:2.5 to 4.5 percent; mo: 0.6-1.2%; ti: 0.02-0.04%; cu: less than or equal to 0.02 percent; o: 40-60ppm, the balance being Fe; the impurity elements in the welding wire are controlled in the following range: s, P and H are less than or equal to 50ppm, the purity requirement of various metals is more than 99.9 percent, wherein the purity of Ti is more than 99.99 percent, and the metal wires with the diameter of 1-2mm are prepared; preparing a welding wire alloy according to the content of each element, and drying for later use;
(1b) a welding wire ingot with nano particles is cast by using a vacuum melting furnace, the vacuum degree is less than or equal to 50Pa, a casting mold is preheated in a drying furnace for 120-180 minutes at the preheating temperature of 250-300 ℃;
(1c) putting the dried C, Ni, Cr, Mo and Fe into a corundum crucible, keeping the vacuum degree less than or equal to 50Pa, increasing the power to melt the alloy, and keeping the temperature for refining for 10-15min when the temperature is raised to 1560-1580 ℃;
(1d) breaking vacuum, adding Ti wires into molten steel by using a wire feeding device, wherein the wire feeding amount is 25-30 mm/Kg; at the moment, the molten steel is kept in a flowing state in the electric arc furnace, the temperature is kept at 1600-3O5Particles;
(1e) after wire feeding is finished, adding Si, Mn and Cu into the molten steel by using a secondary feeding device, vacuumizing to less than or equal to 50Pa, filling nitrogen with the pressure of 0.1-0.5MPa, reducing the temperature to 1560-;
(2) hot working of solder wire ingots
(2a) Homogenizing the welding wire ingot, annealing the welding wire ingot at the temperature of 900-;
(2b) forging a welding wire ingot, namely heating the annealed welding wire ingot to 1200-1250 ℃, cooling to 1100-minus 1150 ℃ after discharging from a furnace, forging and cogging, forging the ingot into a square ingot with the side length of 18-20cm, and cooling to room temperature after the final forging temperature is 900 ℃ below 850-minus;
(2c) rolling a welding wire square ingot at the initial rolling temperature of between 1000 and 1050 ℃, performing 17-20 rolling, namely 6-8 rough rolling, 4-5 intermediate rolling and 7 finish rolling, and controlling the cooling speed to be 0.8-1.0 ℃/s through air cooling; the spinning temperature is controlled between 850 ℃ and 880 ℃, and the diameter of the rolled wire rod is 5 +/-0.2 mm or 8 +/-0.5 mm;
(3) drawing of wire rod
(3a) Annealing the rolled wire rod at the temperature of 900-;
(3b) drawing the wire rods for the first time, respectively drawing the wire rods with the two diameter specifications to the diameters of 3.6-4.0mm and 5.4-6.0mm, then performing intermediate annealing at the temperature of 660-690 ℃ for 1.5-2h, and then discharging and air cooling to room temperature;
(3c) and (4) repeating the step (3b), carrying out drawing and intermediate annealing processes on the wire rod for 9-12 times, wherein the surface shrinkage rate of each drawing is 17-30%, and the surface shrinkage rate of each drawing is ensured to be the same, and finally obtaining the high-strength and high-toughness steel welding wire with the diameter of 1.2mm and the inside provided with the nano particles through acid washing and surface treatment after drawing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106271189A (en) * | 2016-08-24 | 2017-01-04 | 上海交通大学 | A kind of welding wire with small grains tissue or the preparation method of welding rod |
| CN108080815A (en) * | 2017-06-12 | 2018-05-29 | 吉林大学 | A kind of novel nano pottery aluminium Al-alloy welding wire and preparation method |
| CN108796322A (en) * | 2018-06-15 | 2018-11-13 | 东北大学 | A kind of aluminium alloy welding wire and preparation method thereof containing nano alumina particles |
| CN108817734A (en) * | 2018-05-25 | 2018-11-16 | 迈特李新材料(广州)有限公司 | A kind of preparation method of metal-base nanometer composite material welding wire |
| CN108998729A (en) * | 2018-08-06 | 2018-12-14 | 北京科技大学 | A kind of high strength steel and preparation method thereof |
| CN110181193A (en) * | 2019-05-17 | 2019-08-30 | 江西理工大学 | A kind of new A l-Mg-Ti alloy welding wire and preparation method thereof |
| CN110205511A (en) * | 2019-06-28 | 2019-09-06 | 江西理工大学 | A kind of high-strength Al-Si alloy welding wire and preparation method thereof |
| US20200001406A1 (en) * | 2017-11-22 | 2020-01-02 | Shenzhen Fitech Co., Ltd. | Micro/nano particle reinforced composite solder and preparation method therefor |
-
2019
- 2019-09-19 CN CN201910887231.1A patent/CN110625297B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106271189A (en) * | 2016-08-24 | 2017-01-04 | 上海交通大学 | A kind of welding wire with small grains tissue or the preparation method of welding rod |
| CN108080815A (en) * | 2017-06-12 | 2018-05-29 | 吉林大学 | A kind of novel nano pottery aluminium Al-alloy welding wire and preparation method |
| US20200001406A1 (en) * | 2017-11-22 | 2020-01-02 | Shenzhen Fitech Co., Ltd. | Micro/nano particle reinforced composite solder and preparation method therefor |
| CN108817734A (en) * | 2018-05-25 | 2018-11-16 | 迈特李新材料(广州)有限公司 | A kind of preparation method of metal-base nanometer composite material welding wire |
| CN108796322A (en) * | 2018-06-15 | 2018-11-13 | 东北大学 | A kind of aluminium alloy welding wire and preparation method thereof containing nano alumina particles |
| CN108998729A (en) * | 2018-08-06 | 2018-12-14 | 北京科技大学 | A kind of high strength steel and preparation method thereof |
| CN110181193A (en) * | 2019-05-17 | 2019-08-30 | 江西理工大学 | A kind of new A l-Mg-Ti alloy welding wire and preparation method thereof |
| CN110205511A (en) * | 2019-06-28 | 2019-09-06 | 江西理工大学 | A kind of high-strength Al-Si alloy welding wire and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| "纳米技术使特种铝合金变得可焊接", 《铝加工》 * |
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Application publication date: 20191231 Assignee: Langfang Changqing Petroleum Pipe Fittings Co.,Ltd. Assignor: University OF SCIENCE AND TECHNOLOGY BEIJING Contract record no.: X2022980009784 Denomination of invention: A preparation method of high strength and toughness steel welding wire containing nano particles Granted publication date: 20210212 License type: Common License Record date: 20220704 |
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