CN112708822A - Manufacturing method of austenitic stainless steel wire for high-end welding - Google Patents
Manufacturing method of austenitic stainless steel wire for high-end welding Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/04—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of bars or wire
- B21C37/047—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of bars or wire of fine 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
- B23K35/02—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape
- B23K35/0222—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape for use in soldering, brazing
- B23K35/0227—Rods, wires
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/24—Selection of soldering or welding materials proper
- B23K35/30—Selection of soldering or welding materials proper with the principal constituent melting at less than 1550 degrees C
- B23K35/3053—Fe as the principal constituent
- B23K35/308—Fe as the principal constituent with Cr as next major constituent
- B23K35/3086—Fe as the principal constituent with Cr as next major constituent containing Ni or Mn
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/06—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires
- C21D8/065—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires of ferrous alloys
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
- C22C33/06—Making ferrous alloys by melting using master alloys
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/001—Ferrous alloys, e.g. steel alloys containing N
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/42—Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/58—Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.5% by weight of manganese
Abstract
The invention discloses a manufacturing method of an austenitic stainless steel wire rod for high-end welding, wherein a 309Mo type austenitic stainless steel comprises the following steps: 1) EAF + AOD + LF + continuous casting; 2) forging: the forging heating temperature is 1150-; forging by two to four fires, ensuring that the forging starting temperature of each fire is more than or equal to 1100 ℃, the forging stopping temperature of each fire is more than or equal to 1000 ℃, the deformation is 69-80 percent, and finally forging the blank to the required size; 3) wire rod rolling 309Mo type austenitic stainless steel blank is rolled to obtain a wire rod product with a proper specification; the rolling heating temperature is 1100 +/-60 ℃, and the heat preservation time is more than or equal to 2 hours; 4) solution treatment: after rolling, solution annealing is carried out in a furnace, and water cooling is carried out. The problem of because of adding the material ferrite increase that Mo leads to is solved, the poor problem of hot working property, guarantee product quality and batch production.
Description
Technical Field
The invention relates to the field of austenitic stainless steel for welding, in particular to a preparation method of an austenitic stainless steel wire rod product for high-end welding, which is produced by adopting a continuous casting, forging and rolling process.
Background
Modern petrochemical, transportation, aerospace technology, power plant and machine manufacturing industries need to be widely applied to welding of dissimilar steels. When austenitic stainless steel, carbon steel and low alloy steel are welded, 25-13 series, namely Cr25Ni13 type welding wires and welding rods are selected. Thus, the formation of cold cracks due to the martensite structure on the side of the carbon steel and low alloy steel fusion line can be avoided. The Cr25Ni13 type welding wire and electrode are mainly characterized by high Cr and Ni content, good plasticity and crack resistance, and the typical steel is 309 type austenitic stainless steel. Wherein 309Mo is formed by adding higher Mo content in 309 type austenitic stainless steel, so that the material has more excellent strength, crack resistance and corrosion resistance at high temperature, and is mainly used for welding stainless steel containers, composite plates, dissimilar steel and the like of the same type which are resistant to corrosion of sulfuric acid medium. However, sigma middle phase is easily generated in austenitic stainless steel due to high molybdenum content, sigma phase is a brittle and hard secondary phase, precipitation behavior of sigma phase at high temperature can be improved by chromium and molybdenum, adverse effects are generated on mechanical properties of stainless steel, and plasticity and toughness are reduced. Therefore, the 309Mo stainless steel has poor high-temperature plasticity, the thermal deformation temperature range is narrow, the plasticity is sharply reduced when the temperature is lower than 1000 ℃, the processing difficulty is very large, and the stainless steel is in domestic commercialization in domestic markets and almost approaches to import. In China, only three kinds of Bao steel, Yongxing special steel and Shenyuan special steel are produced in a trial mode, wherein the Bao steel is produced in batch by adopting a die casting process, and the Yongxing special steel and Shenyuan special steel are produced in a trial mode by adopting a small ingot die casting → cogging → wire rod rolling process in a small batch mode. Because die casting products have the problems of low yield, long production period and the like, if mass and rapid production is realized, the production of the wire rod products needs to be carried out by a continuous casting method.
However, columnar crystals in the 309Mo continuous casting state are highly developed (fig. 1), and the microstructure thereof is as shown in fig. 2, and a brittle molybdenum-containing phase exists between the dendritic crystals. The traditional cogging process is not enough to break up columnar crystals, and the blank is easy to form cracks, so that a method different from the traditional continuous casting and continuous rolling method needs to be found for producing 309Mo austenitic stainless steel wire products.
Disclosure of Invention
Therefore, the technical problem to be solved by the invention is to provide a production method of a 309Mo type austenitic stainless steel wire rod product for high-end welding, so as to solve the problems of increased ferrite of the material and poor hot workability caused by Mo addition, and ensure the product quality and mass production.
The technical scheme of the invention is that the manufacturing method of the austenitic stainless steel wire for high-end welding comprises smelting and forging, and the applicable chemical component range of 309Mo austenitic stainless steel is as follows: c: 0 to 0.025%, Si: 0.40-0.65%, Mn: 1.5-1.8%, Ni: 13.5-14.0%, Cr: 23.0-25.0%, Mo: 2.1-3.0%, Cu: 0-0.025%, N: 0.030-0.070%, S is less than or equal to 0.002%, P is less than or equal to 0.020%, and the balance of Fe and inevitable impurity elements;
the method comprises the following steps:
1) EAF + AOD + LF + continuous casting
EAF smelting: adding the materials containing the components, stirring the materials at the bottom by adopting nitrogen, and tapping at 1630-1730 ℃;
AOD refining: after steel is added, temperature measurement and sampling are carried out, and oxygen blowing and decarburization are carried out according to detection data; supplementing Cr, Mo, Ni, Mn and Al alloy when the temperature is not less than 1680 ℃; controlling the end point carbon to be less than or equal to 0.04 percent and controlling the end point temperature to be more than or equal to 1700 ℃; after reduction, alloy is added according to component analysis to enable the components to reach target values;
LF refining: performing temperature measurement sampling total analysis on the AOD refined molten steel in the previous process, and finely adjusting components according to an analysis result; hoisting after stirring evenly, ensuring that the components reach the target value before hoisting, and controlling S to be less than or equal to 0.002%; the thermoplasticity can be improved by controlling the S to be less than or equal to 0.002 percent.
Continuous casting: the target superheat degree of the continuous casting tundish is controlled to be less than 50 ℃; the continuous casting drawing speed is controlled to be 1.0-2.5 m/min, and the temperature of the secondary cooling tail end is higher than 1000 ℃; fully peeling and finishing the surface of the continuous casting billet and sampling to test the quality of the continuous casting billet;
2) forging
The forging heating temperature is 1150-; forging by two to four fires, ensuring that the forging starting temperature of each fire is more than or equal to 1100 ℃, the forging stopping temperature of each fire is more than or equal to 1000 ℃, the deformation is 69-80 percent, and finally forging the blank to the required size;
3) wire rod rolling
Rolling 309Mo type austenitic stainless steel blank to obtain a wire rod product with a proper specification; the rolling heating temperature is 1100 +/-60 ℃, and the heat preservation time is more than or equal to 2 hours;
4) solution treatment
After rolling, solution annealing is carried out in a furnace, and water cooling is carried out.
The secondary cold end temperature is above 1000 ℃ during continuous casting to prevent surface formation of sigma phase and the initiation of cracks.
In the step 2), considering that the 309Mo austenitic stainless steel continuous casting structure has developed columnar crystals and brittle molybdenum-containing phases, a forging procedure is added after the traditional continuous casting process to break the columnar crystals and promote the transformation of the molybdenum-containing phases.
The forging temperature is more than or equal to 1100 ℃ so as to ensure the smooth forging deformation, and the temperature is too low and the forging is not moved; the stop forging temperature is not less than 1000 ℃ because a harmful brittle phase is precipitated when the temperature is less than 1000 ℃, so the stop forging temperature is controlled.
Developed columnar crystals in a continuous casting state and brittle molybdenum-containing phases can be broken only by large deformation, and in addition, the deformation amount calculated according to the change of the cross section area before and after forging is 69-80%.
According to the manufacturing method of the austenitic stainless steel wire for high-end welding, the EAF smelting in the step 1) is preferably carried out by adopting the raw materials of micro-carbon Cr iron with metal Cr, low Si, N and P contents, a metal Ni plate, Mn-Fe, molybdenum iron related alloy with low Si, S and P contents; in the AOD refining, Al deoxidizer is used for deep deoxidation; in the LF refining, the temperature of the ladle is 50-100 ℃ higher than the liquidus temperature.
Further, the micro-carbon Cr iron with low contents of Si, N and P is FeCr55C2.0-2.
Preferably, in the LF refining in the step 1), the stirring time is 15-30 min.
According to the manufacturing method of the austenitic stainless steel wire for high-end welding of the present invention, it is preferable that the blank is finally forged to phi 80-100mm in the forging of the step 2).
According to the manufacturing method of the austenitic stainless steel wire rod for high-end welding, the dry head rolling technology is preferably adopted for biting in the wire rod rolling in the step 3), so that the material processing performance is ensured.
According to the method for manufacturing the austenitic stainless steel wire for high-end welding of the present invention, it is preferable that the furnace of step 4) is a ring furnace.
Further, the temperature of the heat preservation section of the annular furnace is 1050 ℃ +/-10 ℃.
Further, the heat preservation time of the annular furnace is 30-40 minutes.
The invention has the advantages of
Compared with the traditional continuous casting and continuous rolling technology, the method for producing the 309Mo type austenitic stainless steel wire rod product has the following advantages:
1. and the continuous casting, forging and rolling process is adopted, so that the production operability is strong.
2. By adding one forging deformation, the columnar crystal in the continuous casting state is obviously thinned and crushed, the smooth production in the rolling process is ensured, and no crack is generated on the surface of the wire rod.
3. According to the traditional die casting, blooming in the first rolling and rolling processes, because a dead head needs to be cut and the surface needs to be polished in the blooming in the first rolling and cogging process of die casting, the yield is reduced, but the forging process added in the invention only deforms a continuous casting square billet into a round billet, does not relate to a dead head and is not easy to form surface cracks, so that the yield of the continuous casting, the forging and the rolling adopted in the invention is higher.
4. Although a forging procedure is added, the production complexity of the steel grade is not increased, and the mass production of the product can be realized.
Drawings
Fig. 1 is a cross-sectional macrostructure diagram of 309Mo steel.
FIG. 2 is a cross-sectional microstructure of a 309Mo steel slab at 50 μm.
FIG. 3 is a cross-sectional microstructure of a 309Mo steel slab at 50 μm.
Detailed Description
Example 1:
309Mo type austenitic stainless steel component: c: 0.018%, Si: 0.47%, Mn: 1.70%, Ni: 13.70%, Cr: 23.12%, Mo: 2.22%, Cu: 0.03%, W: 0.02%, B: 0.003%, Ti: 0.005%, Al: 0.015%, Sn: 0.01%, As: 0.010%, N: 0.048%, S is less than or equal to 0.002%, P: 0.017% and the balance of Fe and inevitable impurity elements.
1) EAF + AOD + LF + continuous casting
EAF smelting: the initial smelting of the molten steel is carried out in a 60-ton electric arc furnace. The raw materials adopt metal Cr or micro-carbon Cr iron with low contents of Si, N and P, metal Ni plates, Mn-Fe, ferromolybdenum with low contents of Si, S and P and other related alloys. Nitrogen was used for bottom stirring, tapping temperature 1650 ℃.
AOD refining: after steel is added, temperature measurement and sampling are carried out, and oxygen blowing and decarburization are carried out according to detection data. The alloy is replenished when the temperature reaches 1690 ℃. The end point carbon is controlled to be less than or equal to 0.04 percent, and the end point temperature is controlled to be 1730 ℃. The deep deoxidation uses Al deoxidizer, the adding amount is 890 kg. The reduction time was 15 minutes, after which the alloy was dosed to achieve the target composition according to the compositional analysis. And drawing slag after reduction to ensure that the drawing slag is clean so as to ensure that the reducing slag does not enter or less enters a steel ladle.
LF refining: and electrifying and heating the steel ladle after the steel ladle is in place, and adjusting slag to ensure that the slag turns white. Temperature measurement sampling and full analysis, and fine adjustment of components according to the analysis result. Hanging the bag after the weak stirring for 20min, and ensuring that the components reach the target value before hanging the bag, wherein S is less than or equal to 0.002 percent. The ladle temperature is 1530 ℃.
Continuous casting: the target superheat degree of the continuous casting tundish is controlled to be less than 50 ℃, and low-carbon covering slag is selected. The continuous casting speed is controlled to be 1.3-2.0 m/min, and the secondary cooling end temperature is 1040-. And (5) fully peeling and finishing the surface of the continuous casting billet, and sampling to test the chemical components of the continuous casting billet.
2) Forging
The heating temperature is 1220 ℃, and the temperature is kept for 5 hours. Forging is carried out by three fires, wherein one end of the first fire is firstly beaten to phi 85mm, the other end of the first fire is beaten to phi 85mm, and the blank is beaten to be round by the third fire. The deformation amount was 70%.
3) Wire rod rolling
Heating temperature 1150 deg.c and maintaining for 3 hr. The bite adopts a dry head rolling technology to ensure the processing performance of the material. Before entering the middle rolling mill set, electric induction compensation heating is carried out, and the compensation heating temperature is 1100 ℃. And closing cooling water in the rolling process to ensure that the finishing temperature is more than or equal to 900 ℃. Finally rolling into coils with the diameter of 5.5 mm.
4) Solution treatment
After rolling, solution annealing (water cooling) is carried out in a circular furnace, and the temperature of the heat preservation section of the circular furnace is 1050 +/-10 ℃ multiplied by 40 minutes.
Example 2:
309Mo type austenitic stainless steel component: c: 0.015%, Si: 0.50%, Mn: 1.59%, Ni: 13.51%, Cr: 23.33%, Mo: 2.20%, Cu: 0.06%, W: 0.02%, B: 0.002%, Ti: 0.010%, Al: 0.020%, Sn: 0.01%, As: 0.010%, N: 0.050%, S is less than or equal to 0.002%, P: 0.021%, and the balance of Fe and inevitable impurity elements.
1) EAF + AOD + LF + continuous casting
EAF smelting: the initial smelting of the molten steel is carried out in a 60-ton electric arc furnace. The raw materials adopt metal Cr or micro-carbon Cr iron with low contents of Si, N and P, metal Ni plates, Mn-Fe, ferromolybdenum with low contents of Si, S and P and other related alloys. Nitrogen is adopted for bottom stirring, and the tapping temperature is 1680 ℃.
AOD refining: after steel is added, temperature measurement and sampling are carried out, and oxygen blowing and decarburization are carried out according to detection data. When the temperature reaches 1695 ℃, the alloy is supplemented. The end point carbon is controlled to be less than or equal to 0.04 percent, and the end point temperature is controlled to be 1725 ℃. The deep deoxidation is carried out by using an Al deoxidizer, and the adding amount is 920 kg. The reduction time was 15 minutes, after which the alloy was dosed to achieve the target composition according to the compositional analysis. And drawing slag after reduction to ensure that the drawing slag is clean so as to ensure that the reducing slag does not enter or less enters a steel ladle.
LF refining: and electrifying and heating the steel ladle after the steel ladle is in place, and adjusting slag to ensure that the slag turns white. Temperature measurement sampling and full analysis, and fine adjustment of components according to the analysis result. Hanging the bag after the weak stirring for 30min, and ensuring that the components reach the target value before hanging the bag, wherein S is less than or equal to 0.002 percent. The ladle temperature is 1550 ℃.
Continuous casting: the target superheat degree of the continuous casting tundish is controlled to be less than 50 ℃, and low-carbon covering slag is selected. The continuous casting speed is controlled to be 1.4-2.0 m/min, and the secondary cooling end temperature is 1050-. And (5) fully peeling and finishing the surface of the continuous casting billet, and sampling to test the chemical components of the continuous casting billet.
2) Forging
The heating temperature is 1230 ℃ and the temperature is kept for 4.5 hours. Forging is carried out by three fires, wherein one end of the first fire is firstly beaten to phi 85mm, the other end of the first fire is beaten to phi 85mm, and the blank is beaten to be round by the third fire. The deformation amount was 75%.
3) Wire rod rolling
Heating to 1140 deg.c and maintaining for 3.5 hr. The bite adopts a dry head rolling technology to ensure the processing performance of the material. Before entering the middle rolling mill set, electric induction compensation heating is carried out, and the compensation heating temperature is 1080 ℃. And closing cooling water in the rolling process to ensure that the finishing temperature is more than or equal to 900 ℃. Finally rolling into coils with the diameter of 5.5 mm.
4) Solution treatment
After rolling, solution annealing (water cooling) is carried out in a circular furnace, and the temperature of the heat preservation section of the circular furnace is 1050 +/-10 ℃ multiplied by 40 minutes.
The welding properties of the product are shown in table 1.
TABLE 1309 weldability of Mo steels
The invention solves the problems of developed 309Mo continuous casting state columnar crystal and poor rolling hot processing performance. The method can be used for mass production, and the product has stable performance and meets the requirement of high-quality welding.
Claims (9)
1. A manufacturing method of an austenitic stainless steel wire for high-end welding comprises smelting and forging, and is characterized in that:
the applicable chemical composition range of the 309Mo austenitic stainless steel is as follows: c: 0 to 0.025%, Si: 0.40-0.65%, Mn: 1.5-1.8%, Ni: 13.5-14.0%, Cr: 23.0-25.0%, Mo: 2.1-3.0%, Cu: 0-0.025%, N: 0.030-0.070%, S is less than or equal to 0.002%, P is less than or equal to 0.020%, and the balance of Fe and inevitable impurity elements;
the method comprises the following steps:
1) EAF + AOD + LF + continuous casting
EAF smelting: adding the materials containing the components, stirring the materials at the bottom by adopting nitrogen, and tapping at 1630-1730 ℃;
AOD refining: after steel is added, temperature measurement and sampling are carried out, and oxygen blowing and decarburization are carried out according to detection data; supplementing Cr, Mo, Ni, Mn and Al alloy when the temperature is not less than 1680 ℃; controlling the end point carbon to be less than or equal to 0.04 percent and controlling the end point temperature to be more than or equal to 1700 ℃; after reduction, alloy is added according to component analysis to enable the components to reach target values;
LF refining: performing temperature measurement sampling total analysis on the AOD refined molten steel in the previous process, and finely adjusting components according to an analysis result; hoisting after stirring evenly, ensuring that the components reach the target value before hoisting, and controlling S to be less than or equal to 0.002%;
continuous casting: the target superheat degree of the continuous casting tundish is controlled to be less than 50 ℃; the continuous casting drawing speed is controlled to be 1.0-2.5 m/min, and the temperature of the secondary cooling tail end is higher than 1000 ℃; fully peeling and finishing the surface of the continuous casting billet and sampling to test the quality of the continuous casting billet;
2) forging
The forging heating temperature is 1150-; forging by two to four fires, ensuring that the forging starting temperature of each fire is more than or equal to 1100 ℃, the forging stopping temperature of each fire is more than or equal to 1000 ℃, the deformation is 69-80 percent, and finally forging the blank to the required size;
3) wire rod rolling
Rolling 309Mo type austenitic stainless steel blank to obtain a wire rod product with a proper specification; the rolling heating temperature is 1100 +/-60 ℃, and the heat preservation time is more than or equal to 2 hours;
4) solution treatment
After rolling, solution annealing is carried out in a furnace, and water cooling is carried out.
2. The method for manufacturing an austenitic stainless steel wire for high-end welding according to claim 1, wherein: in the EAF smelting in the step 1), raw materials adopt the ferro-molybdenum-related alloys of metal Cr, micro-carbon Cr iron with low contents of Si, N and P, metal Ni plates, Mn-Fe and low contents of Si, S and P; in the AOD refining, Al deoxidizer is used for deep deoxidation; in the LF refining, the temperature of the ladle is 50-100 ℃ higher than the liquidus temperature.
3. The method for manufacturing an austenitic stainless steel wire for high-end welding according to claim 2, wherein: the micro-carbon Cr iron with low contents of Si, N and P is FeCr55C2.0-2.
4. The method for manufacturing an austenitic stainless steel wire for high-end welding according to claim 1, wherein: in the LF refining in the step 1), the stirring time is 15-30 min.
5. The method for manufacturing an austenitic stainless steel wire for high-end welding according to claim 1, wherein: and 2) in the forging, finally forging the blank to a diameter of 80-100 mm.
6. The method for manufacturing an austenitic stainless steel wire for high-end welding according to claim 1, wherein: and 3) in the wire rod rolling, the dry head rolling technology is adopted for biting, so that the processing performance of the material is ensured.
7. The method for manufacturing an austenitic stainless steel wire for high-end welding according to claim 1, wherein: and 4), the furnace is a ring furnace.
8. The method for manufacturing an austenitic stainless steel wire for high-end welding according to claim 7, wherein: the temperature of the heat preservation section of the annular furnace is 1050 +/-10 ℃.
9. The method for manufacturing an austenitic stainless steel wire for high-end welding according to claim 7, wherein: the heat preservation time of the annular furnace is 30-40 minutes.
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| CN105803353A (en) * | 2014-12-31 | 2016-07-27 | 天津冶金集团天材科技发展有限公司 | Hot-rolled wire rod for preparation of 21-10Mn7Mo welding wire |
| CN105821346A (en) * | 2015-01-06 | 2016-08-03 | 宝钢特钢有限公司 | Resource-saving duplex stainless steel wire rod and production method thereof |
| CN105643140A (en) * | 2016-03-30 | 2016-06-08 | 内蒙古第机械集团有限公司 | Welding wire special for high-nitrogen austenitic stainless steel |
| CN107283086A (en) * | 2017-05-27 | 2017-10-24 | 太原钢铁(集团)有限公司 | High alloyed austenitic body stainless steel, high alloyed austenitic body stainless steel welding stick and preparation method thereof |
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| CN116393664A (en) * | 2023-05-15 | 2023-07-07 | 广东神和新材料科技有限公司 | Composite stainless steel wire and processing technology thereof |
| CN116393664B (en) * | 2023-05-15 | 2023-11-24 | 广东神和新材料科技有限公司 | Composite stainless steel wire and processing technology thereof |
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| CN112708822B (en) | 2022-07-15 |
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