CN114622141A - High-temperature oxidation resistant low-activation ferrite martensitic steel containing Zr - Google Patents

High-temperature oxidation resistant low-activation ferrite martensitic steel containing Zr Download PDF

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CN114622141A
CN114622141A CN202210279585.XA CN202210279585A CN114622141A CN 114622141 A CN114622141 A CN 114622141A CN 202210279585 A CN202210279585 A CN 202210279585A CN 114622141 A CN114622141 A CN 114622141A
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temperature oxidation
martensitic steel
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邱日盛
曾文
刘庆
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Chongqing University
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    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0205—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips of ferrous alloys
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    • 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
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
    • C21D8/0226—Hot rolling
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    • 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
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0247—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
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    • 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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    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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    • 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
    • C22C38/22—Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
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    • 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
    • C22C38/24—Ferrous alloys, e.g. steel alloys containing chromium with vanadium
    • 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
    • C22C38/28—Ferrous alloys, e.g. steel alloys containing chromium with titanium or zirconium
    • 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
    • C21D2211/00—Microstructure comprising significant phases
    • C21D2211/005—Ferrite
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    • 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
    • C21D2211/00—Microstructure comprising significant phases
    • C21D2211/008—Martensite

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Abstract

The invention discloses a high-temperature oxidation resistant low-activation ferrite martensitic steel containing Zr, which comprises the following chemical components, by weight, 8.0-10.0% of Cr, 0.2-1.0% of Mn, 0.3-0.9% of Si, 1.0-1.8% of W, 0.15-0.25% of C, 0.01-0.1% of Ti, 0.1-0.3% of V, 0.05-1.1% of Zr, 0.01-0.1% of N, less than 0.015% of P, less than 0.01% of S, and the balance Fe and inevitable impurities. The high-temperature oxidation resistance of the ferrite/martensite steel is greatly improved, and the high-temperature oxidation resistance of the ferrite/martensite steel is at least 2-3 times that of the conventional common ferrite/martensite steel.

Description

High-temperature oxidation resistant low-activation ferrite martensitic steel containing Zr
Technical Field
The invention belongs to the technical field of metal materials, relates to martensitic steel, and particularly relates to low-activation martensitic steel containing Zr and resisting high-temperature oxidation.
Background
The common ferritic martensitic steel contains high-activation elements such as Mo, Nb, Ni, Co, Al and the like, and the activation period after neutron irradiation is long, which causes a problem on the post-treatment of nuclear reactor structural materials. In order to solve this problem, a low-activation ferrite/martensite steel containing a low-activation element as a main component is produced. Among the low-activation elements, Cr, W, V, Mn, Ti, Zr, Ta, Si, etc., which are commonly used in steel, have an effect of improving the high-temperature oxidation resistance of steel, but the contents of these elements also need to be controlled. For example, Cr and Si are ferrite-forming elements in steel, and too high content of Cr and Si can cause formation of delta ferrite and reduce mechanical properties of steel; the excessive addition of Mn element in steel can accelerate the diffusion of matrix and M23C6Coarsening of carbides reduces the stability of the matrix.
Ferritic martensitic steel has been widely used as a structural material for key parts of boilers, turbines, etc. and is considered as a main candidate material for fourth-generation nuclear reactors because of its advantages of small thermal expansion coefficient, good thermal conductivity and thermal fatigue resistance, excellent creep resistance and oxidation resistance, and relatively low price.
Compared with the prior nuclear reactor technology, the fourth generation nuclear reactor has more severe working conditions and higher operating temperature range, the temperature of the fuel cladding can reach 650-700 ℃, and the material is required to have good high-temperature oxidation resistance. However, the maximum service temperature of the current common ferrite/martensite steel is lower than 600 ℃, and when the common ferrite/martensite steel is exposed for a long time at the temperature higher than the maximum service temperature, the oxidation is serious, so that the base material is gradually oxidized and corroded, and finally, the mechanical property of the material is reduced. Therefore, how to improve the high temperature oxidation resistance of the ferrite/martensite steel so as to improve the maximum use temperature is a problem to be solved urgently.
Disclosure of Invention
The invention aims to provide a Zr-containing low-activation ferritic martensitic steel with high-temperature oxidation resistance, which solves the problem that the highest service temperature of the existing ferritic martensitic steel is lower due to poor high-temperature oxidation resistance.
The technical scheme of the invention is as follows:
the Zr-containing low-activation ferrite martensitic steel with high temperature oxidation resistance comprises, by weight, 8.0-10.0 wt% of Cr, 0.2-1.0 wt% of Mn, 0.3-0.9 wt% of Si, 1.0-1.8 wt% of W, 0.15-0.25 wt% of C, 0.01-0.1 wt% of Ti, 0.1-0.3 wt% of V, 0.05-1.1 wt% of Zr, 0.01-0.1 wt% of N, less than 0.015 wt% of P, less than 0.01 wt% of S, and the balance Fe and inevitable impurities.
Preferably, the chemical components of the high-temperature oxidation resistant Zr-containing low-activation ferritic martensitic steel in percentage by weight are 8.0-10.0 wt% of Cr, 0.2-1.0 wt% of Mn, 0.3-0.9 wt% of Si, 1.0-1.8 wt% of W, 0.15-0.25 wt% of C, 0.01-0.1 wt% of Ti, 0.1-0.3 wt% of V, 0.1-1.1 wt% of Zr, 0.01-0.1 wt% of N, less than 0.015 wt% of P, less than 0.01 wt% of S, and the balance Fe and inevitable impurities.
Preferably, the chemical components of the high-temperature oxidation resistant Zr-containing low-activation ferrite martensite steel comprise, by weight, 8.0-10.0 wt% of Cr, 0.2-1.0 wt% of Mn, 0.3-0.9 wt% of Si, 1.0-1.8 wt% of W, 0.15-0.25 wt% of C, 0.01-0.1 wt% of Ti, 0.1-0.3 wt% of V, 0.3-1.1 wt% of Zr, 0.01-0.1 wt% of N, less than 0.015 wt% of P, less than 0.01 wt% of S, and the balance Fe and inevitable impurities.
Preferably, the chemical components of the high-temperature oxidation resistant Zr-containing low-activation ferrite martensite steel comprise, by weight, 8.0-10.0 wt% of Cr, 0.2-1.0 wt% of Mn, 0.3-0.9 wt% of Si, 1.0-1.8 wt% of W, 0.15-0.25 wt% of C, 0.01-0.1 wt% of Ti, 0.1-0.3 wt% of V, 0.5-1.1 wt% of Zr, 0.01-0.1 wt% of N, less than 0.015 wt% of P, less than 0.01 wt% of S, and the balance Fe and inevitable impurities.
Preferably, the chemical components of the high-temperature oxidation resistant Zr-containing low-activation ferritic martensitic steel comprise, by weight, 8.5-9.5% of Cr, 0.4-0.6% of Mn, 0.5-0.7% of Si, 1.4-1.7% of W, 0.15-0.22% of C, 0.01-0.02% of Ti, 0.18-0.26% of V, 0.1-1.1% of Zr, 0.02-0.05% of N, 0.01-0.013% of P, 0.001-0.003% of S, and the balance Fe and inevitable impurities.
Preferably, the chemical components of the high-temperature oxidation resistant Zr-containing low-activation ferritic martensitic steel comprise, by weight, 8.5-9.5% of Cr, 0.4-0.6% of Mn, 0.5-0.7% of Si, 1.4-1.7% of W, 0.15-0.22% of C, 0.01-0.02% of Ti, 0.18-0.26% of V, 0.3-1.1% of Zr, 0.02-0.05% of N, 0.01-0.013% of P, 0.001-0.003% of S, and the balance Fe and inevitable impurities.
Preferably, the chemical components of the high-temperature oxidation resistant Zr-containing low-activation ferritic martensitic steel comprise, by weight, 8.5-9.5% of Cr, 0.4-0.6% of Mn, 0.5-0.7% of Si, 1.4-1.7% of W, 0.15-0.22% of C, 0.01-0.02% of Ti, 0.18-0.26% of V, 0.5-1.1% of Zr, 0.02-0.05% of N, 0.01-0.013% of P, 0.001-0.003% of S, and the balance Fe and inevitable impurities.
Preferably, the chemical components of the high-temperature oxidation resistant Zr-containing low-activation ferritic martensitic steel in percentage by weight are 9.5 wt% of Cr, 0.49 wt% of Mn, 0.62 wt% of Si, 1.64 wt% of W, 0.18 wt% of C, 0.02 wt% of Ti, 0.21 wt% of V, 0.5 wt% of Zr, 0.03 wt% of N, 0.011 wt% of P, 0.001 wt% of S and the balance of Fe.
Preferably, the chemical components of the high-temperature oxidation resistant Zr-containing low-activation ferritic martensitic steel in percentage by weight are 8.9 wt% of Cr, 0.44 wt% of Mn, 0.60 wt% of Si, 1.48 wt% of W, 0.16 wt% of C, 0.01 wt% of Ti, 0.19 wt% of V, 1.01 wt% of Zr, 0.04 wt% of N, 0.010 wt% of P, 0.001 wt% of S and the balance of Fe.
The processing technology of the Zr-containing low-activation ferritic martensitic steel with high temperature oxidation resistance comprises the following steps:
(1) weighing raw material components according to the weight ratio and carrying out vacuum melting; (2) forging at 950-1200 ℃, and air-cooling the blank to room temperature after forging; (3) hot rolling at 850-1150 ℃, cooling to room temperature, wherein the single rolling deformation is 20-30%, and the total rolling deformation is 80%; (4) normalizing the rolled and formed plate at 950-1150 ℃ and tempering at 740-780 ℃.
The technical scheme of the invention has the following beneficial effects:
for the ferrite martensite steel which is in service for a long time and has the most extensive usage amount in a high-temperature environment, the problem of low high-temperature oxidation resistance is solved by increasing the Zr content, and the high-temperature oxidation resistance is at least 2-3 times of that of the current common ferrite martensite steel. In addition, the research shows that the high temperature oxidation resistance of the steel is improved along with the increase of the Zr content, but the high temperature oxidation resistance of the steel is reduced after the Zr content is increased to a certain value, and in the invention, the high temperature oxidation resistance of the steel is found to be the best when the Zr content is 0.5 percent, and is 3.5 times that of the commercial T91 ferrite/martensite steel.
Drawings
FIG. 1 shows the surface oxide morphology after oxidizing in air at 650 ℃ for 400h in example 1 of the present invention.
FIG. 2 is the surface oxide morphology after the oxidation of example 2 of the present invention in air at 650 deg.C for 400 h.
FIG. 3 shows the surface oxide morphology after oxidizing example 3 in air at 650 ℃ for 400 h.
FIG. 4 shows the surface oxide morphology after the oxidation of example 4 of the present invention in air at 650 deg.C for 400 h.
FIG. 5 is a graph showing the morphology of the surface oxide of comparative example 1 of the present invention after oxidizing in air at 650 ℃ for 400 hours.
FIG. 6 is an oxidation weight gain curve of inventive examples 1-4 and comparative example 1 oxidized in air at 650 ℃ for 400 hours.
Detailed Description
The present invention will be described in detail with reference to the following embodiments in order to fully understand the objects, features and effects of the invention. The process or apparatus of the present invention is conventional in the art and, unless otherwise specified, is not limited to the particular apparatus or process described herein. The following terms have the meanings commonly understood by those skilled in the art, unless otherwise specified.
The invention is further illustrated by the following examples, which are not intended to limit the scope of the invention.
The high-temperature oxidation resistant low-activation ferrite martensitic steel containing Zr comprises, by weight, 8.0-10.0% of Cr, 0.2-1.0% of Mn, 0.3-0.9% of Si, 1.0-1.8% of W, 0.15-0.25% of C, 0.01-0.1% of Ti, 0.1-0.3% of V, 0.05-1.1% of Zr, 0.01-0.1% of N, less than 0.015% of P, less than 0.01% of S, and the balance Fe and inevitable impurities.
The Zr-containing low activation ferritic martensitic steel resistant to high temperature oxidation according to the present invention can be prepared by a conventional method in the art, for example, by the following method, according to the following steps: (1) weighing raw material components according to the weight ratio and carrying out vacuum melting; (2) forging at 950-1200 ℃, and air-cooling the blank to room temperature after forging; (3) hot rolling at 850-1150 deg.c with single rolling deformation of 20-30% and total rolling deformation of 80%, and air cooling to room temperature; (4) normalizing the rolled and formed plate at 950-1150 ℃ and tempering at 740-780 ℃.
The oxidation resistance measurement method in the following examples is as follows:
the high temperature oxidation resistance of the steel is characterized by the weight gain of the sample after oxidation in air at high temperature for a long time. The weight gain method is to calculate the oxidation weight gain value of the steel after the test is finished. Cutting a high-temperature oxidation sample on a heat-treated steel plate, wherein the specification of the sample is a rectangle of 30 multiplied by 10 multiplied by 5mm, the sample is uniform in thickness and regular in shape, the surface of the sample is polished and polished to a mirror surface, all edges are polished smoothly, and finally, the sample is cleaned by acetone and alcohol and dried.
The sample should be measured to an accuracy of 0.02mm, at least 3 points are measured, and the average value is taken. The analytical balance precision is 0.0001g, and the vernier caliper precision is 0.02 mm.
The oxidation weight gain per unit area (K) is calculated by the following formula (1)
K＝(m0-m1)/(S0X t) formula (1)
In the formula (1), m0Mass of sample before test, g;
m1to try outThe quality of the test sample, g;
S0m is the original surface area of the sample2；
t is the test time, h.
Example 1
The composition of the Zr-containing low activation ferritic martensitic steel resistant to high temperature oxidation of this example is shown in table 1.
The preparation method of the low activation ferritic martensitic steel containing Zr and resistant to high temperature oxidation of the embodiment is as follows:
(1) weighing raw material components according to the weight ratio and carrying out vacuum melting; (2) forging: the initial forging temperature of the ingot blank is 1150 ℃, the final forging temperature is 950 ℃, and the blank is air-cooled to the room temperature after the forging is finished; (3) hot rolling: then hot rolling is carried out within the temperature range of 1000 ℃, the deformation of single rolling is 20 percent, the total rolling deformation is 80 percent, and the steel is cooled to room temperature by air; (4) normalizing and tempering: normalizing and tempering the rolled and formed plate, wherein the normalizing process is 980-30 min, and the tempering process is 760-90 min.
The appearance of the oxide on the surface of the obtained steel sample after being oxidized for 400 hours at 650 ℃ is shown in figure 1, the oxide is granular, the size is relatively fine and uniform, and the weight gain is 0.316mg/cm2。
Example 2
The composition of the Zr-containing low activation ferritic martensitic steel resistant to high temperature oxidation of the present example is shown in table 1.
The method of manufacturing the Zr-containing low activation ferritic martensitic steel resistant to high temperature oxidation of this example is the same as that of example 1.
The appearance of the oxide on the surface of the obtained steel sample after being oxidized for 400 hours at 650 ℃ is shown in figure 2, the oxide is granular, the size is relatively fine and uniform, and the weight gain is 0.272mg/cm2。
Example 3
The composition of the Zr-containing low activation ferritic martensitic steel resistant to high temperature oxidation of the present example is shown in table 1.
The method of manufacturing the Zr-containing low activation ferritic martensitic steel resistant to high temperature oxidation of this example is the same as that of example 1.
The appearance of the oxide on the surface of the obtained steel sample after being oxidized for 400 hours at 650 ℃ is shown in figure 3, the oxide is granular, the size is fine and uniform, and the weight gain is 0.180mg/cm2。
Example 4
The composition of the Zr-containing low activation ferritic martensitic steel resistant to high temperature oxidation of the present example is shown in table 1.
The method of manufacturing the Zr-containing low activation ferritic martensitic steel resistant to high temperature oxidation of this example is the same as that of example 1.
The appearance of the oxide on the surface of the obtained steel sample after being oxidized for 400 hours at 650 ℃ is shown in figure 4, the oxide is granular, the size is relatively fine and uniform, and the weight gain is 0.196mg/cm2。
Comparative example 1
A commercial T91 ferritic/martensitic steel was used, the composition of which is shown in table 1.
The appearance of the oxide on the surface of the steel sample after being oxidized at 650 ℃ for 400 hours is shown in figure 5, the shape of the oxide consists of a sheet layer with larger size and a particle with smaller size, and the weight gain is 0.624mg/cm2。
The oxidation kinetics curves of examples 1-4 and comparative example 1 are shown in fig. 6, and it can be seen that the high temperature oxidation resistance of examples 1-4 is significantly better than that of comparative example 1. In examples 1 to 4, the oxidation weight gain was decreased and then increased with the increase of Zr content, and the high temperature oxidation resistance of example 3 was the best, about 3.5 times that of comparative example 1.
TABLE 1 chemical composition (wt%) of ferritic martensitic steel
Figure BDA0003556319980000051
Figure BDA0003556319980000061

Claims (10)

1. A Zr-containing low-activation ferritic martensitic steel resistant to high-temperature oxidation is characterized in that: the alloy comprises, by weight, 8.0-10.0 wt% of Cr, 0.2-1.0 wt% of Mn, 0.3-0.9 wt% of Si, 1.0-1.8 wt% of W, 0.15-0.25 wt% of C, 0.01-0.1 wt% of Ti, 0.1-0.3 wt% of V, 0.05-1.1 wt% of Zr, 0.01-0.1 wt% of N, less than 0.015 wt% of P, less than 0.01 wt% of S, and the balance of Fe and inevitable impurities.
2. The Zr-containing low activation ferritic martensitic steel as claimed in claim 1 being resistant to high temperature oxidation characterized in that: the alloy comprises, by weight, 8.0-10.0 wt% of Cr, 0.2-1.0 wt% of Mn, 0.3-0.9 wt% of Si, 1.0-1.8 wt% of W, 0.15-0.25 wt% of C, 0.01-0.1 wt% of Ti, 0.1-0.3 wt% of V, 0.1-1.1 wt% of Zr, 0.01-0.1 wt% of N, less than 0.015 wt% of P, less than 0.01 wt% of S, and the balance of Fe and inevitable impurities.
3. The Zr-containing low activation ferritic martensitic steel as claimed in claim 1 being resistant to high temperature oxidation characterized in that: the alloy comprises, by weight, 8.0-10.0 wt% of Cr, 0.2-1.0 wt% of Mn, 0.3-0.9 wt% of Si, 1.0-1.8 wt% of W, 0.15-0.25 wt% of C, 0.01-0.1 wt% of Ti, 0.1-0.3 wt% of V, 0.3-1.1 wt% of Zr, 0.01-0.1 wt% of N, less than 0.015 wt% of P, less than 0.01 wt% of S, and the balance Fe and inevitable impurities.
4. The Zr-containing low-activation ferritic martensitic steel as claimed in claim 1 resistant to high temperature oxidation, characterized in that: the alloy comprises, by weight, 8.0-10.0 wt% of Cr, 0.2-1.0 wt% of Mn, 0.3-0.9 wt% of Si, 1.0-1.8 wt% of W, 0.15-0.25 wt% of C, 0.01-0.1 wt% of Ti, 0.1-0.3 wt% of V, 0.5-1.1 wt% of Zr, 0.01-0.1 wt% of N, less than 0.015 wt% of P, less than 0.01 wt% of S, and the balance of Fe and inevitable impurities.
5. The Zr-containing low activation ferritic martensitic steel as claimed in claim 1 being resistant to high temperature oxidation characterized in that: the alloy comprises, by weight, 8.5-9.5 wt% of Cr, 0.4-0.6 wt% of Mn, 0.5-0.7 wt% of Si, 1.4-1.7 wt% of W, 0.15-0.22 wt% of C, 0.01-0.02 wt% of Ti, 0.18-0.26 wt% of V, 0.1-1.1 wt% of Zr, 0.02-0.05 wt% of N, 0.01-0.013 wt% of P, 0.001-0.003 wt% of S, and the balance of Fe and inevitable impurities.
6. The Zr-containing low activation ferritic martensitic steel as claimed in claim 1 being resistant to high temperature oxidation characterized in that: the alloy comprises, by weight, 8.5-9.5 wt% of Cr, 0.4-0.6 wt% of Mn, 0.5-0.7 wt% of Si, 1.4-1.7 wt% of W, 0.15-0.22 wt% of C, 0.01-0.02 wt% of Ti, 0.18-0.26 wt% of V, 0.3-1.1 wt% of Zr, 0.02-0.05 wt% of N, 0.01-0.013 wt% of P, 0.001-0.003 wt% of S, and the balance of Fe and inevitable impurities.
7. The Zr-containing low activation ferritic martensitic steel as claimed in claim 1 being resistant to high temperature oxidation characterized in that: the alloy comprises, by weight, 8.5-9.5 wt% of Cr, 0.4-0.6 wt% of Mn, 0.5-0.7 wt% of Si, 1.4-1.7 wt% of W, 0.15-0.22 wt% of C, 0.01-0.02 wt% of Ti, 0.18-0.26 wt% of V, 0.5-1.1 wt% of Zr, 0.02-0.05 wt% of N, 0.01-0.013 wt% of P, 0.001-0.003 wt% of S, and the balance Fe and inevitable impurities.
8. The Zr-containing low-activation ferritic martensitic steel as claimed in claim 1 resistant to high temperature oxidation, characterized in that: the chemical components by weight percentage are 9.5 wt% of Cr, 0.49 wt% of Mn, 0.62 wt% of Si, 1.64 wt% of W, 0.18 wt% of C, 0.02 wt% of Ti, 0.21 wt% of V, 0.5 wt% of Zr, 0.03 wt% of N, 0.011 wt% of P, 0.001 wt% of S and the balance of Fe.
9. The Zr-containing low activation ferritic martensitic steel as claimed in claim 1 being resistant to high temperature oxidation characterized in that: the chemical components by weight percentage are 8.9 wt% of Cr, 0.44 wt% of Mn, 0.60 wt% of Si, 1.48 wt% of W, 0.16 wt% of C, 0.01 wt% of Ti, 0.19 wt% of V, 1.01 wt% of Zr, 0.04 wt% of N, 0.010 wt% of P, 0.001 wt% of S and the balance of Fe.
10. The Zr low-activation ferritic martensitic steel with resistance to high-temperature oxidation according to any one of claims 1 to 9, characterized in that the processing of said Zr low-activation ferritic martensitic steel with resistance to high-temperature oxidation comprises the following steps:
(1) weighing raw material components according to the weight ratio and carrying out vacuum melting; (2) forging at 950-1200 ℃, and air-cooling the blank to room temperature after forging; (3) hot rolling at 850-1150 ℃, cooling to room temperature, wherein the single rolling deformation is 20-30%, and the total rolling deformation is 80%; (4) normalizing the rolled and formed plate at 950-1150 ℃ and tempering at 740-780 ℃.
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CN113913706A (en) * 2021-10-14 2022-01-11 中国科学院合肥物质科学研究院 Anti-irradiation low-activation steel-based structural material capable of forming self-healing hydrogen permeation resistant layer through thermal oxidation

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JP2000290756A (en) * 1999-04-06 2000-10-17 Sumitomo Metal Ind Ltd HIGH Cr MARTENSITIC HEAT RESISTANT STEEL EXCELLENT IN HOT WORKABILITY
JP2010065322A (en) * 2009-12-04 2010-03-25 Babcock Hitachi Kk Ferritic heat resistant steel
CN103305765A (en) * 2013-06-14 2013-09-18 中国科学院金属研究所 Low activation martensitic steel with resistance to high temperature oxidation and high strength
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