CN112247396A - Austenite heat-resistant steel welding wire and preparation method and application thereof - Google Patents
Austenite heat-resistant steel welding wire and preparation method and application thereof Download PDFInfo
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- CN112247396A CN112247396A CN202011155679.3A CN202011155679A CN112247396A CN 112247396 A CN112247396 A CN 112247396A CN 202011155679 A CN202011155679 A CN 202011155679A CN 112247396 A CN112247396 A CN 112247396A
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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
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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
- B23K35/40—Making wire or rods for soldering or welding
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Abstract
The invention belongs to the technical field of welding materials, and provides an austenitic heat-resistant steel welding wire, a preparation method and application thereof, wherein the austenitic heat-resistant steel welding wire comprises the following chemical components in percentage by weight: c: 0.04-0.10%; cr: 18.0 to 21.0 percent; ni: 23.0-26.0%; mn: 0.7-1.5%; si: 0.6-1.0%; nb: 0.3-0.8%; w: 1.5-2.5%; cu: 1.0-2.0%; al: 1.0-2.5%; b: less than or equal to 80 ppm; the balance of Fe. After the welding wire provided by the invention is adopted for welding, deposited metal has high-temperature strength, good high-temperature oxidation resistance, stable welding process, no defect, good process performance and high yield.
Description
Technical Field
The invention belongs to the technical field of welding materials, particularly relates to an austenitic heat-resistant steel welding wire, and a preparation method and application thereof.
Background
High radioactive wastes are inevitably generated in the process of providing a large amount of energy by nuclear power, and the treatment of deep geological burial after the high-temperature calcination vitrification treatment of the radioactive wastes is a current proper high radioactive waste treatment method. The radioactive waste vitrification treatment refers to a process of converting radioactive waste liquid into a glass solidified body, which is a radioactive waste liquid solidification method that has reached a commercial scale. Radioactive waste liquid is melted into a vitreous body at high temperature, radioactive nuclide is fixed in the vitreous body, and the melted vitreous body is poured into a storage tank.
Since the radioactive waste vitrification process determines that it is necessary to solidify the molten high radioactive waste by pouring it into a packaging container (vitreous tank) at high temperature. Therefore, the high radioactive nuclear waste glass solidified body packaging container needs to bear the ultrahigh temperature pouring impact of the high radioactive waste glass body without deformation and cracking, and the packaging container needs to have certain performance of resisting external impact and cracking in the transportation process.
The novel high-temperature austenitic heat-resistant steel can become a candidate material of a high radioactive nuclear waste packaging container, and the design and development of the ultrahigh-temperature austenitic heat-resistant steel welding material matched with the novel high-temperature austenitic heat-resistant steel welding material is an important basis for promoting the application of new materials and the reliable service of the packaging container.
Disclosure of Invention
The invention aims to provide an austenitic heat-resistant steel welding wire, a preparation method and application thereof.
The invention aims to provide an austenitic heat-resistant steel welding wire which comprises the following chemical components in percentage by weight: c: 0.04-0.10%; cr: 18.0 to 21.0 percent; ni: 23.0-26.0%; mn: 0.7-1.5%; si: 0.6-1.0%; nb: 0.3-0.8%; w: 1.5-2.5%; cu: 1.0-2.0%; al: 1.0-2.5%; b: less than or equal to 80 ppm; the balance of Fe.
Preferably, the welding wire further comprises the following chemical components in percentage by weight: s is less than or equal to 0.001 percent; p is less than or equal to 0.003 percent; h is less than or equal to 2 ppm; n is less than or equal to 0.001 percent; o is less than or equal to 0.001 percent.
Preferably, the welding wire comprises the following chemical components in percentage by weight: 0.087%, Cr: 19.95%, Ni: 24.96%, Mn: 1.45%, Si: 0.8%, Nb: 0.6%, W: 1.8%, Cu: 1.8%, Al: 1.5%, B: 0.0050%, P: 0.0020%, S: 0.001%, N: less than or equal to 0.001 percent and the balance of Fe.
Preferably, the welding wire comprises the following chemical components in percentage by weight: 0.077%, Cr: 19.94%, Ni: 24.95%, Mn: 1.42%, Si: 0.78%, Nb: 0.4%, W: 2.4%, Cu: 1.6%, Al: 2.0%, B: 0.0060%, P: 0.0020%, S: 0.001%, N: less than or equal to 0.001 percent and the balance of Fe.
Preferably, the welding wire comprises the following chemical components in percentage by weight: 0.085%, Cr: 19.98%, Ni: 25.26%, Mn: 1.35%, Si: 0.65%, Nb: 0.8%, W: 2.0%, Cu: 2.0%, Al: 1.46%, B: 0.0040%, P: 0.0020%, S: 0.001%, N: less than or equal to 0.001 percent and the balance of Fe.
Preferably, the welding wire comprises the following chemical components in percentage by weight: 0.081%, Cr: 20.05%, Ni: 24.86%, Mn: 1.45%, Si: 0.70%, Nb: 0.65%, W: 1.9%, Cu: 1.8%, Al: 2.3%, B: 0.0055%, P: 0.0020%, S: 0.001%, N: less than or equal to 0.001 percent and the balance of Fe.
The invention also provides a preparation method of the austenitic heat-resistant steel welding wire, which comprises the following steps:
s1: smelting a master alloy steel ingot by adopting vacuum melting and electroslag remelting processes, removing a riser and a surface oxide skin of the steel ingot, keeping the temperature at 1150-1200 ℃ for 1-1.5 h, and forging the steel ingot into a square rod of 40 x 40 mm;
s2: keeping the temperature at 1100-1130 ℃ for 30-60 min, and then carrying out hot continuous rolling to obtain a wire rod with the diameter phi of 8 mm;
s3: removing surface oxide skin of the wire rod by adopting an acid washing and mechanical grinding mode, and preparing the wire rod into a welding wire with a target diameter through multiple cold drawing;
s4: and annealing and pickling the welding wire after cold drawing to ensure that the tensile strength of the welding wire is 1100-1200 MPa.
Preferably, in step S3, hydrogen annealing is required when the deformation amount exceeds 60% during the cold drawing.
The invention also provides application of the austenitic heat-resistant steel welding wire. The austenitic heat-resistant steel welding wire can be used for welding austenitic heat-resistant steel, nickel-based high-temperature alloy and low-alloy steel materials.
Advantageous effects
Compared with the prior art, the invention has the beneficial effects that:
1. after the welding wire provided by the invention is adopted for welding, deposited metal has high-temperature strength, good high-temperature oxidation resistance, stable welding process, no defect, good process performance and high yield.
2. The austenitic heat-resistant steel welding wire can be applied to the preparation and processing of nuclear power high-level radioactive waste molten glass packaging containers and can also be applied to the preparation and processing of ultrahigh-temperature high-strength corrosion-resistant antioxidant devices required in the fields of thermal power, chemical industry and the like.
Drawings
FIG. 1 is a diagram showing the dimensions of welding grooves (unit: mm) in examples of the present invention and comparative examples;
FIG. 2 is a typical metallographic structure of a weld obtained in example 1 of the present invention, in which FIG. 2-A is a metallographic structure at a lower temperature of 100 μm, and FIG. 2-B is a metallographic structure at a lower temperature of 20 μm;
Detailed Description
In order to understand the present invention, the following examples are given to further illustrate the present invention.
Example 1:
the austenitic heat-resistant steel welding wire comprises the following chemical components in percentage by weight: c: 0.087%, Cr: 19.95%, Ni: 24.96%, Mn: 1.45%, Si: 0.8%, Nb: 0.6%, W: 1.8%, Cu: 1.8%, Al: 1.5%, B: 0.0050%, P: 0.0020%, S: 0.001%, N: less than or equal to 0.001 percent and the balance of Fe.
Example 2:
the austenitic heat-resistant steel welding wire comprises the following chemical components in percentage by weight: c: 0.077%, Cr: 19.94%, Ni: 24.95%, Mn: 1.42%, Si: 0.78%, Nb: 0.4%, W: 2.4%, Cu: 1.6%, Al: 2.0%, B: 0.0060%, P: 0.0020%, S: 0.001%, N: less than or equal to 0.001 percent and the balance of Fe.
Example 3
The austenitic heat-resistant steel welding wire comprises the following chemical components in percentage by weight: c: 0.085%, Cr: 19.98%, Ni: 25.26%, Mn: 1.35%, Si: 0.65%, Nb: 0.8%, W: 2.0%, Cu: 2.0%, Al: 1.46%, B: 0.0040%, P: 0.0020%, S: 0.001%, N: less than or equal to 0.001 percent and the balance of Fe.
Example 4
The austenitic heat-resistant steel welding wire comprises the following chemical components in percentage by weight: c: 0.081%, Cr: 20.05%, Ni: 24.86%, Mn: 1.45%, Si: 0.70%, Nb: 0.65%, W: 1.9%, Cu: 1.8%, Al: 2.3%, B: 0.0055%, P: 0.0020%, S: 0.001%, N: less than or equal to 0.001 percent and the balance of Fe.
In order to examine the difference of the mechanical properties of the austenitic heat-resistant steel welding wire and the common austenitic welding wire, the invention is also provided with a comparative example, and the chemical components of the comparative example are shown as comparative example 1:
comparative example 1
The austenitic heat-resistant steel welding wire comprises the following chemical components in percentage by weight: c: 0.12%, Cr: 19.96%, Ni: 24.95%, Mn: 1.45%, Si: 0.4%, Nb: 0.2%, Cu: 1.8%, B: 0.0050%, P: 0.0020%, S: 0.001%, N: less than or equal to 0.001 percent and the balance of Fe.
The welding wires prepared in examples 1 to 4 and comparative example 1 were fabricated into test pieces according to the welding specifications of table 1 and the welding groove size shown in fig. 1, and then the mechanical properties of the welded joints at room temperature and 1100 ℃ were measured according to the requirements of the relevant standards.
The welding specifications are shown in table 1 below:
TABLE 1
The mechanical property results of the welds at room temperature in examples 1-4 and comparative example 1 are shown in table 2:
TABLE 2
The mechanical performance results of the welds at 1100 ℃ in examples 1-4 and comparative example 1 are shown in table 3:
TABLE 3
From the mechanical property data of the weld joints of examples 1 to 4 of the invention and comparative example 1 at room temperature and 1100 ℃ given in tables 2 and 3, it can be seen that the weld joint property requirements of the austenitic heat-resistant steel welding wire of the invention satisfy: the tensile strength σ of the austenitic heat-resistant steel welding wires of examples 1 to 4 was at room temperatureb>690MPa, yield strength sigmap0.2Greater than 480MPa, and the elongation A is more than or equal to 30 percent; tensile strength sigma of austenitic heat-resistant steel welding wire at 1100 DEG Cb>130MPa, yield strength sigmap0.2More than 100MPa, elongation more than or equal to 25 percent and oxidation weight loss rate of less than 0.5g m at 1100 DEG C-2h-1。
As can be seen from the data of examples 1-4 and comparative example 1 in tables 2 and 3: by adopting the components of the austenitic heat-resistant steel welding wire for ultrahigh temperature designed by the invention, the austenitic heat-resistant steel welding wires prepared in the embodiments 1 to 4 meet the performance requirements of the invention. The content of C in the comparative example is higher than the range of the invention, the content of Nb is lower than the range of the invention, and the comparative example does not contain W and Al elements, the high-temperature strength and the oxidation performance of the welding seam of the comparative example do not meet the design requirements of the invention, and the elongation after high-temperature fracture is also lower than the design requirements of the invention.
Example 6
A preparation method of an austenitic heat-resistant steel welding wire comprises the following steps:
s1: smelting a master alloy steel ingot by adopting vacuum melting and electroslag remelting processes, removing a riser and surface oxide skin of the steel ingot, keeping the temperature at 1150 ℃ for 1.5 hours, and forging the steel ingot into a square rod of 40 x 40 mm;
s2: keeping the temperature at 1100 ℃ for 60min, and then hot continuous rolling into a wire rod with the diameter phi of 8 mm;
s3: removing surface oxide skin of the wire rod by adopting an acid washing and mechanical grinding mode, and preparing the wire rod into a welding wire with a target diameter through multiple cold drawing;
s4: after cold drawing, the welding wire needs to be annealed and pickled, so that the tensile strength of the welding wire is 1100 MPa.
Example 7
The preparation method of the austenitic heat-resistant steel welding wire is characterized by comprising the following steps:
s1: smelting a master alloy steel ingot by adopting vacuum melting and electroslag remelting processes, removing a riser and surface oxide skin of the steel ingot, keeping the temperature at 1200 ℃ for 1h, and forging the steel ingot into a square rod with the diameter of 40 x 40 mm;
s2: keeping the temperature at 1130 ℃ for 30min, and then hot continuous rolling into a wire rod with the diameter phi of 8 mm;
s3: removing surface oxide skin of the wire rod by adopting an acid washing and mechanical grinding mode, and preparing the wire rod into a welding wire with a target diameter through multiple cold drawing;
s4: after cold drawing, the welding wire needs to be annealed and pickled, so that the tensile strength of the welding wire is 1200 MPa.
Example 8
The preparation method of the austenitic heat-resistant steel welding wire is characterized by comprising the following steps:
s1: smelting a master alloy steel ingot by adopting vacuum melting and electroslag remelting processes, removing a riser and surface oxide skin of the steel ingot, keeping the temperature at 1180 ℃ for 1.5 hours, and forging the steel ingot into a square rod of 40 x 40 mm;
s2: keeping the temperature at 1130 ℃ for 60min, and then carrying out hot continuous rolling to obtain a wire rod with the diameter phi of 8 mm;
s3: removing surface oxide skin of the wire rod by adopting an acid washing and mechanical grinding mode, and preparing the wire rod into a welding wire with a target diameter through multiple cold drawing;
s4: after cold drawing, the welding wire needs to be annealed and pickled, so that the tensile strength of the welding wire is 1200 MPa.
Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (9)
1. The austenitic heat-resistant steel welding wire is characterized by comprising the following chemical components in percentage by weight: c: 0.04-0.10%; cr: 18.0 to 21.0 percent; ni: 23.0-26.0%; mn: 0.7-1.5%; si: 0.6-1.0%; nb: 0.3-0.8%; w: 1.5-2.5%; cu: 1.0-2.0%; al: 1.0-2.5%; b: less than or equal to 80 ppm; the balance of Fe.
2. The austenitic heat resistant steel welding wire according to claim 1, wherein the wire further comprises, in weight percent: s is less than or equal to 0.001 percent; p is less than or equal to 0.003 percent; h is less than or equal to 2 ppm; n is less than or equal to 0.001 percent; o is less than or equal to 0.001 percent.
3. The austenitic heat-resistant steel welding wire according to claim 2, wherein the wire has the following chemical composition, in weight percent, C: 0.087%, Cr: 19.95%, Ni: 24.96%, Mn: 1.45%, Si: 0.8%, Nb: 0.6%, W: 1.8%, Cu: 1.8%, Al: 1.5%, B: 0.0050%, P: 0.0020%, S: 0.001%, N: less than or equal to 0.001 percent and the balance of Fe.
4. The austenitic heat-resistant steel welding wire according to claim 2, wherein the wire has the following chemical composition, in weight percent, C: 0.077%, Cr: 19.94%, Ni: 24.95%, Mn: 1.42%, Si: 0.78%, Nb: 0.4%, W: 2.4%, Cu: 1.6%, Al: 2.0%, B: 0.0060%, P: 0.0020%, S: 0.001%, N: less than or equal to 0.001 percent and the balance of Fe.
5. The austenitic heat-resistant steel welding wire according to claim 2, wherein the wire has the following chemical composition, in weight percent, C: 0.085%, Cr: 19.98%, Ni: 25.26%, Mn: 1.35%, Si: 0.65%, Nb: 0.8%, W: 2.0%, Cu: 2.0%, Al: 1.46%, B: 0.0040%, P: 0.0020%, S: 0.001%, N: less than or equal to 0.001 percent and the balance of Fe.
6. The austenitic heat-resistant steel welding wire according to claim 2, wherein the wire has the following chemical composition, in weight percent, C: 0.081%, Cr: 20.05%, Ni: 24.86%, Mn: 1.45%, Si: 0.70%, Nb: 0.65%, W: 1.9%, Cu: 1.8%, Al: 2.3%, B: 0.0055%, P: 0.0020%, S: 0.001%, N: less than or equal to 0.001 percent and the balance of Fe.
7. The method for preparing an austenitic heat-resistant steel welding wire according to any one of claims 1 to 6, comprising the steps of:
s1: smelting a master alloy steel ingot by adopting vacuum melting and electroslag remelting processes, removing a riser and a surface oxide skin of the steel ingot, keeping the temperature at 1150-1200 ℃ for 1-1.5 h, and forging the steel ingot into a square rod of 40 x 40 mm;
s2: keeping the temperature at 1100-1130 ℃ for 30-60 min, and then carrying out hot continuous rolling to obtain a wire rod with the diameter phi of 8 mm;
s3: removing surface oxide skin of the wire rod by adopting an acid washing and mechanical grinding mode, and preparing the wire rod into a welding wire with a target diameter through multiple cold drawing;
s4: and annealing and pickling the welding wire after cold drawing to ensure that the tensile strength of the welding wire is 1100-1200 MPa.
8. The method of manufacturing an austenitic heat-resistant steel welding wire according to claim 7, wherein hydrogen annealing is required when the amount of deformation exceeds 60% during cold drawing in step S3.
9. Use of the austenitic heat-resistant steel welding wire according to any of claims 1 to 6.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113134680A (en) * | 2021-04-27 | 2021-07-20 | 合肥工业大学 | Welding material and welding process for cold welding repair of casting defects of high-strength nodular cast iron castings |
| CN113478118A (en) * | 2021-05-25 | 2021-10-08 | 江苏新恒基特种装备股份有限公司 | Nickel-chromium-iron heat-resistant alloy argon arc welding wire for additive manufacturing and preparation method |
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