CN110607490A - Hafnium zirconium titanium reinforced austenitic stainless steel and preparation method thereof - Google Patents
Hafnium zirconium titanium reinforced austenitic stainless steel and preparation method thereof Download PDFInfo
- Publication number
- CN110607490A CN110607490A CN201910903442.XA CN201910903442A CN110607490A CN 110607490 A CN110607490 A CN 110607490A CN 201910903442 A CN201910903442 A CN 201910903442A CN 110607490 A CN110607490 A CN 110607490A
- Authority
- CN
- China
- Prior art keywords
- equal
- stainless steel
- less
- austenitic stainless
- metal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- 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
- C21D8/005—Modifying the physical properties by deformation combined with, or followed by, heat treatment of ferrous alloys
-
- 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
-
- 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
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
-
- 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
-
- 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
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- 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
- C22C38/50—Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
-
- 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 hafnium zirconium titanium reinforced austenitic stainless steel and a preparation method thereof, and the austenitic stainless steel comprises the following elements: according to the mass percentage, C is less than or equal to 0.05, Ni is 8.0-13.0, Cr is 18.0-22.0, Ti is less than or equal to 0.1, Hf is less than or equal to 0.05 and less than or equal to 0.4, Zr is less than or equal to 0.05 and less than or equal to 0.3, Mn is less than or equal to 2.0, Si is less than or equal to 1.0, P is less than or equal to 0.035, S is less than or equal to 0.030, and the balance is Fe. The preparation method comprises the following steps: (1) smelting and casting stainless steel; (2) hot rolling and cogging; (3) cold rolling deformation; (4) and (4) high-temperature heat treatment. Disclosure of the inventionThe addition of zirconium, hafnium and titanium in the stainless steel can not only improve the strength, but also improve the radiation resistance of the austenitic stainless steel, and the H content is 0.5mol/L at 80 DEG C2SO4In the electrolyte, the corrosion rate of the austenitic stainless steel is 20.3-32.7 muA/cm2Moreover, the plasticity of the austenitic stainless steel is higher than 49%, and the tensile strength is higher than 730 MPa.
Description
Technical Field
The invention relates to hafnium zirconium titanium reinforced austenitic stainless steel and a preparation method thereof, belonging to the field of austenitic stainless steel.
Background
In the face of the current increasingly severe resource, energy and environmental problems, sustainable development of energy is becoming more important. Nuclear power is one of the important sources for large-scale sustainable electric energy supply in the world today. The nuclear power plant is a new type of power plant that utilizes the energy in the nuclear power plant to generate electricity on a large scale. Nuclear power currently accounts for approximately 16% of the total world power production. The austenitic stainless steel is widely applied to the field of nuclear power with excellent corrosion resistance, but is also very easy to be corroded by corrosive ions, stress corrosion and pitting corrosion occur, and the irradiation resistance and the mechanical property of the austenitic stainless steel are sharply reduced under the irradiation condition of high dose. Therefore, the irradiation resistance, corrosion resistance and mechanical properties of austenitic stainless steel need to be stably improved in service in a reactor.
The invention patent application with publication number CN 109355590A discloses a copper-hafnium corrosion-resistant reinforced austenitic stainless steel and a preparation method thereof, wherein the components of the austenitic stainless steel are equal to or less than 0.07 of C, 8.0-10.0 of Ni, 17.0-19.0 of Cr, equal to or less than 1.04 of Hf, 0.2-0.8 of Cu, equal to or less than 2.0 of Mn, equal to or less than 1.0 of Si, equal to or less than 0.035 of P, equal to or less than 0.030 of S, and the balance of Fe; the corrosion rate of the alloy in a 0.5mol/L sulfuric acid solution at 80 ℃ is 10.8-12.5 mu A/cm2The yield strength is 300-320 MPa, the tensile strength is 590-610 MPa, and the plasticity is 41-45%.
The invention patent application of publication No. CN 109355595A discloses a copper-hafnium-cobalt modified stainless steel and a processing and heat treatment method thereof, wherein the components of the austenitic stainless steel are that C is less than or equal to 0.03, Ni is 12.0-15.0, Cr is 16.0-18.0, Mo is 2.0-3.0, Hf is less than or equal to 0.74, Cu is 0.2-0.8, Co is 0.1-0.5, Mn is less than or equal to 2.0, Si is less than or equal to 1.0, P is less than or equal to 0.035, S is less than or equal to 0.030, and the balance is Fe; the corrosion rate of the alloy in a 0.5mol/L sulfuric acid solution at the temperature of 80 ℃ is 1.26-1.82 mu A/cm2, the yield strength is 150-160 MPa, the tensile strength is 520-540 MPa, and the plasticity is 42-47%.
Although the two technical schemes can enhance the performance of the austenitic stainless steel to a certain degree, the corrosion resistance, the mechanical property or the plasticity of the obtained austenitic stainless steel are still low; in addition, the two technical schemes both adopt copper for modification, and although copper can promote crystallization, the copper is easy to generate hot brittleness in the hot processing process, so that the mechanical property of the copper is not stable enough, and the copper is beneficial to certain extent in the industrial production process.
Disclosure of Invention
The purpose of the invention is as follows: aiming at the problems of lower irradiation resistance, corrosion resistance, mechanical property and the like of the conventional austenitic stainless steel, the invention provides a hafnium zirconium titanium reinforced austenitic stainless steel and a preparation method thereof.
The technical scheme is as follows: the invention relates to hafnium zirconium titanium reinforced austenitic stainless steel, which comprises the following elements: according to the mass percentage, C is less than or equal to 0.05, Ni is 8.0-13.0, Cr is 18.0-22.0, Ti is less than or equal to 0.1, Hf is less than or equal to 0.05 and less than or equal to 0.4, Zr is less than or equal to 0.05 and less than or equal to 0.3, Mn is less than or equal to 2.0, Si is less than or equal to 1.0, P is less than or equal to 0.035, S is less than or equal to 0.030, and the balance is Fe.
The preparation method of the hafnium zirconium titanium reinforced austenitic stainless steel comprises the following steps:
(1) selecting raw materials of pure iron, metal chromium, metal nickel, metal manganese, metal hafnium, metal titanium, metal zirconium, iron silicon and iron carbon blocks according to the mass percentage of each element in the stainless steel, smelting and casting to form an alloy ingot;
(2) hot rolling and cogging;
(3) cold rolling deformation;
(4) and (4) high-temperature heat treatment.
After the alloy is smelted, the carbide in the alloy can be fully crushed and dispersed and distributed through hot rolling cogging and cold rolling deformation, and then a uniform austenite structure can be obtained through high-temperature solution treatment, so that the alloy has high strength and corrosion resistance.
Preferably, in the step (1), the smelting and casting processes are performed in vacuum or under argon protection, and the metal solution can be uniformly mixed by using a magnetic stirring technology in the smelting process.
In the step (2), the process conditions for hot rolling and cogging are preferably as follows: heating the casting blank to 1100-1300 ℃, preserving heat for 10-24 hours, and then discharging for rolling; the starting temperature of hot rolling is more than or equal to 1050 ℃, the finishing temperature is more than or equal to 900 ℃, and the total hot rolling load of the plate is more than or equal to 40%. The pipes, rods, wires, sections, cold punching parts and cast ingots can be cogging by hot forging, hole-pattern rolling or universal rolling.
In the step (3), cold deformation can be carried out by adopting a reciprocating tube rolling, hole pattern rolling, universal rolling or drawing method so as to obtain the required size and specification of the product. Preferably, the process conditions of cold rolling deformation are as follows: the total rolling reduction of cold rolling is more than or equal to 40 percent. The large cold rolling deformation is beneficial to ensuring that a uniform structure is formed after subsequent heating treatment.
Further, in the step (4), the process conditions of the high-temperature heat treatment are as follows: after cold rolling deformation, annealing treatment is carried out at 850-1000 ℃, and the heat preservation time is 60-120 minutes; after annealing, water quenching is adopted for rapid cooling. The purpose of the high temperature hold is to form coarse recrystallized grains, so that the broken spherical carbides are transferred from the grain boundaries to the interior of the coarse recrystallized grains, thereby reducing the grain boundary corrosion tendency.
The invention principle is as follows: after the stainless steel is irradiated, a radiation-induced segregation (RIS) effect is generated, so that a chromium-poor phenomenon occurs on grain boundaries, the corrosion of the grain boundaries is poor, and stress cracking corrosion easily occurs. Zirconium and hafnium are elements with large size radius, which can effectively reduce or inhibit radiation-assisted stress corrosion cracking (IASCC), and promote defect recombination mainly through a solid solution-vacancy capture mechanism. Specifically, a strong carbide forming element Hf is added into the alloy to form a high-stability spherical particle HfC compound, so that the solid solution content of actual C in austenite particles is greatly reduced, and the corrosion resistance of the stainless steel is improved; meanwhile, titanium and zirconium are both strong carbide forming elements, and by adding titanium and zirconium into the stainless steel, carbon is combined with the titanium and the zirconium to generate TiC and ZrC, so that the carbon is not combined with chromium, and crystal boundary chromium deficiency is not caused, thereby avoiding intergranular corrosion and further improving the corrosion resistance of the stainless steel; in addition, the addition of titanium and zirconium in stainless steel can change the inclusion form and distribution in the steel, and has a certain positive effect on the mechanical properties of austenitic stainless steel.
Is advantageous inThe effect is as follows: compared with the prior art, the invention has the advantages that: (1) according to the invention, zirconium, hafnium and titanium are added into the stainless steel, so that not only can the strength be improved, but also the irradiation resistance of the austenitic stainless steel can be improved, and finally, the hafnium, zirconium and titanium reinforced austenitic stainless steel with good corrosion resistance and excellent mechanical property is obtained; 0.5mol/L H at 80 DEG C2SO4In the electrolyte, the corrosion rate of the austenitic stainless steel is 20.3-32.7 muA/cm2Moreover, the plasticity of the austenitic stainless steel is higher than 49%, and the tensile strength is higher than 730 MPa; (2) the preparation method of the austenitic stainless steel is simple, the process controllability is strong, and the industrial production is easy to realize.
Drawings
FIG. 1 is a graph showing the mechanical properties of a hafnium zirconium titanium reinforced austenitic stainless steel manufactured in example 1;
FIG. 2 is an electron microscope scanning image of the corrosion surface of the hafnium zirconium titanium reinforced austenitic stainless steel prepared in example 2 after being subjected to the corrosion resistance test;
FIG. 3 is a polarization diagram of the hafnium zirconium titanium reinforced austenitic stainless steel prepared in example 3 during a corrosion resistance test.
Detailed Description
The technical scheme of the invention is further explained by combining the attached drawings.
The invention relates to a hafnium zirconium titanium reinforced austenitic stainless steel, which is characterized in that on the basis of 304 austenitic stainless steel alloy components, strong carbide forming elements of hafnium (Hf), zirconium (Zr) and titanium (Ti) are added, and 304-TiZrHf stainless steel is used for short. The alloy comprises the following elements in percentage by mass: c is less than or equal to 0.05, Ni is 8.0-13.0, Cr is 18.0-22.0, Ti is less than or equal to 0.1, Hf is less than or equal to 0.05 and less than or equal to 0.4, Zr is less than or equal to 0.05 and less than or equal to 0.3, Mn is less than or equal to 2.0, Si is less than or equal to 1.0, P is less than or equal to 0.035, S is less than or equal to 0.030, and the balance is Fe.
304 is American grade, corresponding to Chinese stainless steel grade 06Cr19Ni10(ii) a 304 stainless steel is a food grade stainless steel accepted by the state, is mainly used in the aspects of food processing, storage and transportation, and also has important application in medical appliances, ship parts and the like. The performance indexes of the plate are as follows: the yield strength is more than or equal to 205MPa, the tensile strength is more than or equal to 520MPa, and the elongation rate is higher thanNot less than 40 percent and the hardness is not more than HV 200.
The 304 stainless steel contains not more than 0.08% of C. C in austenitic stainless steel has a strong solid solution strengthening effect, but C is easily combined with Fe to form cementite Fe3C, is precipitated in a lamellar manner, so that the corrosion resistance of the stainless steel is difficult to improve. Therefore, the addition of the strong carbide forming element Hf to the alloy results in the formation of a high stability HfC compound in the form of spherical particles, which greatly reduces the actual C solid solution content in the austenite grains and improves the corrosion resistance of stainless steel.
Titanium and zirconium are both strong carbide forming elements, and when titanium and zirconium are added into stainless steel, carbon is combined with the titanium and the zirconium to generate TiC and ZrC, so that the carbon is not combined with chromium, the chromium depletion of a crystal boundary is avoided, and the intergranular corrosion is avoided. The content of chromium in the austenite grains is improved, so that the corrosion resistance of the stainless steel is increased. The titanium and zirconium added into the stainless steel can also change the inclusion form and distribution in the steel, and have a certain positive effect on the mechanical properties of the austenitic stainless steel.
Example 1
Selecting pure iron, metal chromium, metal nickel, metal manganese, metal hafnium, metal zirconium, metal titanium, iron silicon and iron carbon block as raw materials, and preparing the austenitic stainless steel with the following components: c is 0.05, Ni is 11, Cr is 20, Ti is 0.1, Hf is 0.05, Zr is 0.1, Mn is 2, Si is 1, P is less than or equal to 0.035, S is less than or equal to 0.030, and the balance is Fe.
Casting into alloy cast ingots through arc melting or induction melting; smelting is carried out in vacuum or under the protection of argon, and a magnetic stirring technology is utilized to uniformly mix the metal solution in the smelting process; casting under vacuum or argon protection to form square ingot or round ingot;
the ingot is hot-rolled and cogging by adopting a rolling mill, the hot-rolling scheme is that the casting blank is heated to 1200 +/-10 ℃, the temperature is kept for 24 hours, then the casting blank is discharged from a furnace for rolling, the hot-rolling starting temperature is 1180 +/-20 ℃, the finish rolling temperature is more than or equal to 950 ℃, and the total hot-rolling amount of the plate is more than or equal to 60 percent;
the plate is deformed by cold rolling, and the total cold rolling reduction is more than or equal to 50 percent;
annealing the plate at 950 ℃, wherein the heat preservation time is 90 minutes, and protective gas is not needed during heating; and after annealing, water quenching and cooling are adopted to obtain the 304-TiZrHf stainless steel.
The hardness of the 304-TiZrHf stainless steel is 309HV, the yield strength is 400MPa, the tensile strength is 780MPa, and the elongation is 51 percent; fig. 1 is a mechanical property curve, and it can be seen from fig. 1 that it has very good ductility and high strength. 0.5mol/L H at 80 DEG C2SO4In the electrolyte, the corrosion rate of the 304-TiZrHf stainless steel is 31.2 mu A/cm2。
Example 2
Selecting pure iron, metal chromium, metal nickel, metal manganese, metal hafnium, metal zirconium, metal titanium, iron silicon and iron carbon block as raw materials, and preparing the austenitic stainless steel with the following components: c is 0.05, Ni is 11, Cr is 20, Ti is 0.1, Hf is 0.2, Zr is 0.1, Mn is 2, Si is 1, P is less than or equal to 0.035, S is less than or equal to 0.030, and the balance is Fe.
Casting into alloy cast ingots through arc melting or induction melting; smelting is carried out in vacuum or under the protection of argon, and a magnetic stirring technology is utilized to uniformly mix the metal solution in the smelting process; casting under vacuum or argon protection to form square ingot or round ingot;
the ingot casting is hot-rolled and cogging by adopting a rolling mill, the hot-rolling scheme is that the casting blank is heated to 1250 +/-10 ℃, the temperature is kept for 10 hours, then the casting blank is discharged from a furnace for rolling, the hot-rolling starting temperature is 1240 +/-20 ℃, the final rolling temperature is more than or equal to 950 ℃, and the total hot-rolling amount of the plate is more than or equal to 60 percent;
the plate is deformed by cold rolling, and the total cold rolling reduction is more than or equal to 50 percent;
annealing the plate at 950 ℃, wherein the heat preservation time is 90 minutes, and protective gas is not needed during heating; and after annealing, water quenching and cooling are adopted to obtain the 304-TiZrHf stainless steel.
The hardness of the 304-TiZrHf stainless steel is 316HV, the yield strength is 387MPa, the tensile strength is 760MPa, and the elongation is 49%. 0.5mol/L H at 80 DEG C2SO4In the electrolyte, the corrosion rate of the 304-TiZrHf stainless steel is 25.1 mu A/cm2(ii) a FIG. 2 shows the metallographic phase of the corroded surface of the alloy after a corrosion resistance test, and H is 0.5mol/L at 80 DEG C2SO4The electrolyte is corroded for 30min, and the corroded surface is smooth, and the crystal grains are very fineSmall and uniform, has a small amount of corrosion products, but has very clear grain boundary and stronger corrosion resistance.
Example 3
Selecting pure iron, metal chromium, metal nickel, metal manganese, metal hafnium, metal zirconium, metal titanium, iron silicon and iron carbon block as raw materials, and preparing the austenitic stainless steel with the following components: c is 0.05, Ni is 11, Cr is 20, Ti is 0.1, Hf is 0.4, Zr is 0.1, Mn is 2, Si is 1, P is less than or equal to 0.035, S is less than or equal to 0.030, and the balance is Fe.
Casting into alloy cast ingots through arc melting or induction melting; smelting is carried out in vacuum or under the protection of argon, and a magnetic stirring technology is utilized to uniformly mix the metal solution in the smelting process; casting under vacuum or argon protection to form square ingot or round ingot;
the ingot is hot-rolled and cogging by adopting a rolling mill, the hot-rolling scheme is that the casting blank is heated to 1150 +/-10 ℃, the temperature is kept for 24 hours, then the casting blank is discharged from a furnace for rolling, the hot-rolling starting temperature is 1140 +/-20 ℃, the final rolling temperature is more than or equal to 950 ℃, and the total hot-rolling amount of the plate is more than or equal to 60 percent;
the plate is deformed by cold rolling, and the total cold rolling reduction is more than or equal to 50 percent;
annealing the plate at 950 ℃, wherein the heat preservation time is 90 minutes, and protective gas is not needed during heating; and after annealing, water quenching and cooling are adopted to obtain the 304-TiZrHf stainless steel.
The hardness of the 304-TiZrHf stainless steel is 301HV, the yield strength is 358MPa, the tensile strength is 737MPa, and the elongation is 55 percent; FIG. 3 is a polarization curve of the cathode region on the side of the anode region, the cathode region on the right side, and the lowest point corresponding to the self-etching potential. 0.5mol/L H at 80 DEG C2SO4The corrosion rate of the 316-TiZrHf alloy in the electrolyte is 20.3 mu A/cm2。
Example 4
The preparation method selects pure iron, metal chromium, metal nickel, metal manganese, metal hafnium, metal zirconium, metal titanium, iron silicon and iron carbon block as raw materials, and the prepared austenitic stainless steel comprises the following components: c is 0.05, Ni is 11, Cr is 20, Ti is 0.1, Hf is 0.05, Zr is 0.05, Mn is 2, Si is 1, P is less than or equal to 0.035, S is less than or equal to 0.030, and the balance is Fe.
Casting into alloy cast ingots through arc melting or induction melting; smelting is carried out in vacuum or under the protection of argon, and a magnetic stirring technology is utilized to uniformly mix the metal solution in the smelting process; casting under vacuum or argon protection to form square ingot or round ingot;
the ingot is hot-rolled and cogging by adopting a rolling mill, the hot-rolling scheme is that the casting blank is heated to 1250 +/-10 ℃, the temperature is kept for 24 hours and then the casting blank is discharged from a furnace for rolling, the hot-rolling starting temperature is 1240 +/-20 ℃, the finish rolling temperature is more than or equal to 950 ℃, and the total hot-rolling amount of the plate is more than or equal to 60 percent;
the plate is deformed by cold rolling, and the total cold rolling reduction is more than or equal to 50 percent;
annealing the plate at 950 ℃, wherein the heat preservation time is 90 minutes, and protective gas is not needed during heating; and after annealing, water quenching and cooling are adopted to obtain the 304-TiZrHf stainless steel.
The hardness of the 304-TiZrHf stainless steel is 308.4HV, the yield strength is 389MPa, the tensile strength is 764MPa, and the elongation is 50%. 0.5mol/L H at 80 DEG C2SO4In the electrolyte, the corrosion rate of the 304-TiZrHf stainless steel is 31.6 mu A/cm2。
Example 5
The preparation method selects pure iron, metal chromium, metal nickel, metal manganese, metal hafnium, metal zirconium, metal titanium, iron silicon and iron carbon block as raw materials, and the prepared austenitic stainless steel comprises the following components: c is 0.05, Ni is 11, Cr is 20, Ti is 0.1, Hf is 0.3, Zr is 0.3, Mn is 2, Si is 1, P is less than or equal to 0.035, S is less than or equal to 0.030, and the balance is Fe.
Casting into alloy cast ingots through arc melting or induction melting; smelting is carried out in vacuum or under the protection of argon, and a magnetic stirring technology is utilized to uniformly mix the metal solution in the smelting process; casting under vacuum or argon protection to form square ingot or round ingot;
the ingot is hot-rolled and cogging by adopting a rolling mill, the hot-rolling scheme is that the casting blank is heated to 1200 +/-10 ℃, the temperature is kept for 24 hours, then the casting blank is discharged from a furnace for rolling, the hot-rolling starting temperature is 1180 +/-20 ℃, the finish rolling temperature is more than or equal to 950 ℃, and the total hot-rolling amount of the plate is more than or equal to 60 percent;
the plate is deformed by cold rolling, and the total cold rolling reduction is more than or equal to 50 percent;
annealing the plate at 950 ℃, wherein the heat preservation time is 90 minutes, and protective gas is not needed during heating; and after annealing, water quenching and cooling are adopted to obtain the 304-TiZrHf stainless steel.
The hardness of the 304-TiZrHf stainless steel is 302.6HV, the yield strength is 360MPa, the tensile strength is 745MPa, and the elongation is 50%. 0.5mol/L H at 80 DEG C2SO4In the electrolyte, the corrosion rate of the 304-TiZrHf stainless steel is 22.4 mu A/cm2。
Example 6
The preparation method selects pure iron, metal chromium, metal nickel, metal manganese, metal hafnium, metal zirconium, metal titanium, iron silicon and iron carbon block as raw materials, and the prepared austenitic stainless steel comprises the following components: c is 0.03, Ni is 8, Cr is 18, Ti is 0.08, Hf is 0.05, Zr is 0.05, Mn is 1.5, Si is 0.8, P is less than or equal to 0.035, S is less than or equal to 0.030, and the balance is Fe.
Casting into alloy cast ingots through arc melting or induction melting; smelting is carried out in vacuum or under the protection of argon, and a magnetic stirring technology is utilized to uniformly mix the metal solution in the smelting process; casting under vacuum or argon protection to form square ingot or round ingot;
the ingot is hot-rolled and cogging by adopting a rolling mill, the hot-rolling scheme is that the casting blank is heated to 1150 +/-10 ℃, the temperature is kept for 10 hours, then the casting blank is discharged from a furnace for rolling, the hot-rolling starting temperature is 1140 +/-20 ℃, the final rolling temperature is more than or equal to 950 ℃, and the total hot-rolling amount of the plate is more than or equal to 40 percent;
the plate is deformed by cold rolling, and the total cold rolling reduction is more than or equal to 40 percent;
annealing the plate at 850 ℃, wherein the heat preservation time is 120 minutes, and protective gas is not needed during heating; and after annealing, water quenching and cooling are adopted to obtain the 304-TiZrHf stainless steel.
The hardness of the 304-TiZrHf stainless steel is 304.2HV, the yield strength is 354MPa, the tensile strength is 730MPa, and the elongation is 59%. 0.5mol/L H at 80 DEG C2SO4In the electrolyte, the corrosion rate of the 304-TiZrHf stainless steel is 32.7 mu A/cm2。
Example 7
The preparation method selects pure iron, metal chromium, metal nickel, metal manganese, metal hafnium, metal zirconium, metal titanium, iron silicon and iron carbon block as raw materials, and the prepared austenitic stainless steel comprises the following components: c is 0.05, Ni is 13, Cr is 20, Ti is 0.1, Hf is 0.3, Zr is 0.3, Mn is 2, Si is 1, P is less than or equal to 0.035, S is less than or equal to 0.030, and the balance is Fe.
Casting into alloy cast ingots through arc melting or induction melting; smelting is carried out in vacuum or under the protection of argon, and a magnetic stirring technology is utilized to uniformly mix the metal solution in the smelting process; casting under vacuum or argon protection to form square ingot or round ingot;
the ingot is hot-rolled and cogging by adopting a rolling mill, the hot-rolling scheme is that the casting blank is heated to 1200 +/-10 ℃, the temperature is kept for 24 hours, then the casting blank is discharged from a furnace for rolling, the hot-rolling starting temperature is 1180 +/-20 ℃, the finish rolling temperature is more than or equal to 950 ℃, and the total hot-rolling amount of the plate is more than or equal to 60 percent;
the plate is deformed by cold rolling, and the total cold rolling reduction is more than or equal to 50 percent;
annealing the plate at 1000 ℃ for 60 minutes without using protective gas during heating; and after annealing, water quenching and cooling are adopted to obtain the 304-TiZrHf stainless steel.
The hardness of the 304-TiZrHf stainless steel is 314.3HV, the yield strength is 394MPa, the tensile strength is 775MPa, and the elongation is 49%. 0.5mol/L H at 80 DEG C2SO4In the electrolyte, the corrosion rate of the 304-TiZrHf stainless steel is 21.2 mu A/cm2。
The test methods for the corrosion resistance, hardness and tensile mechanical properties of the 304-TiZrHf stainless steel in the above examples are as follows.
(1) Hardness: the hardness test was carried out using an HVS-50 Vickers hardness tester with a load of 1Kg, and 5 points were hit and averaged, as shown in Table 1.
(2) Tensile mechanical properties: an electronic universal tester is adopted for carrying out a tensile test, a rectangular sample with the nominal section size of 2-3 multiplied by 4 multiplied by 20.6mm is taken, and the average values of the tensile strength, the yield strength and the elongation of 3 samples treated in the same way are listed in table 1.
(3) Corrosion resistance
The corrosion current was obtained by Tafel (Tafel) line extrapolation. The test method comprises preparing metal sample into electrode, immersing in corrosive medium, and measuring steady stateMaking log I-E diagram of volt-ampere (E-I) data, extending the straight line part of the cathode and anode polarization curve; the obtained intersection point is corresponding to logIcor, and the corrosion current Icor is divided by the sample area S accurately measured in advance0Thus obtaining the corrosion rate.
Comparison of corrosion performance was performed using the electrochemical workstation CHI660E at 80 ℃ as test temperature. The specific measurement conditions of the corrosion rate are: the area of the corroded surface is 1cm2The stainless steel is taken as a working electrode, a saturated calomel electrode is taken as a reference electrode, and a platinum sheet is taken as an auxiliary electrode; 0.5mol/L of H2SO4Heating the electrolyte to 80 ℃ by using a water bath box; the samples were subjected to a linear potential scan at a scan rate of 2 mV/s. The measurement is completed by the potentiostat function of an electrochemical potentiostat or an electrochemical workstation, the measured polarization curve is subjected to Tafel (Tafel) fitting by using the test software of the instrument to obtain the corrosion current, and the corrosion current Icor is divided by the sample area S accurately measured in advance0The resulting corrosion rate was measured 3 times and averaged, as shown in table 1.
TABLE 1 compositions and Corrosion rates, hardness and tensile Properties of the examples
Note: the contents of Mn, Si, P, S, and the like in the examples in table 1 correspond to the elemental composition of austenitic stainless steel, and Fe is the balance and is not listed in table 1.
Claims (6)
1. A hafnium zirconium titanium reinforced austenitic stainless steel, characterized by, the elemental composition of the austenitic stainless steel is as follows: according to the mass percentage, C is less than or equal to 0.05, Ni is 8.0-13.0, Cr is 18.0-22.0, Ti is less than or equal to 0.1, Hf is less than or equal to 0.05 and less than or equal to 0.4, Zr is less than or equal to 0.05 and less than or equal to 0.3, Mn is less than or equal to 2.0, Si is less than or equal to 1.0, P is less than or equal to 0.035, S is less than or equal to 0.030, and the balance is Fe.
2. A method of making the hafnium zirconium titanium reinforced austenitic stainless steel of claim 1, comprising the steps of:
(1) selecting raw materials of pure iron, metal chromium, metal nickel, metal manganese, metal hafnium, metal titanium, metal zirconium, iron silicon and iron carbon blocks according to the mass percentage of each element in the stainless steel, smelting and casting to form an alloy ingot;
(2) hot rolling and cogging;
(3) cold rolling deformation;
(4) and (4) high-temperature heat treatment.
3. The method for preparing the hafnium zirconium titanium reinforced austenitic stainless steel as set forth in claim 2, wherein the smelting and casting processes are performed in vacuum or argon protection in the step (1), and the metal solution is uniformly mixed by using a magnetic stirring technique in the smelting process.
4. The method for preparing a hafnium zirconium titanium reinforced austenitic stainless steel as set forth in claim 2, wherein the hot rolling cogging in the step (2) is performed under the following process conditions: heating the casting blank to 1100-1300 ℃, preserving heat for 10-24 hours, and then discharging for rolling; the starting temperature of hot rolling is more than or equal to 1050 ℃, the finishing temperature is more than or equal to 900 ℃, and the total hot rolling load of the plate is more than or equal to 40%.
5. The method for preparing a hafnium zirconium titanium reinforced austenitic stainless steel as set forth in claim 2, wherein the process conditions of the cold rolling deformation in the step (3) are: the total rolling reduction of cold rolling is more than or equal to 40 percent.
6. The method for preparing a hafnium zirconium titanium reinforced austenitic stainless steel as set forth in claim 2, wherein the process conditions of the high temperature heat treatment in the step (4) are: after cold rolling deformation, annealing treatment is carried out at 850-1000 ℃, and the heat preservation time is 60-120 minutes; after annealing, water quenching is adopted for rapid cooling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910903442.XA CN110607490B (en) | 2019-09-24 | 2019-09-24 | Hafnium zirconium titanium reinforced austenitic stainless steel and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910903442.XA CN110607490B (en) | 2019-09-24 | 2019-09-24 | Hafnium zirconium titanium reinforced austenitic stainless steel and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110607490A true CN110607490A (en) | 2019-12-24 |
| CN110607490B CN110607490B (en) | 2021-03-26 |
Family
ID=68892063
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910903442.XA Active CN110607490B (en) | 2019-09-24 | 2019-09-24 | Hafnium zirconium titanium reinforced austenitic stainless steel and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110607490B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112935265A (en) * | 2021-01-25 | 2021-06-11 | 北京科技大学 | Preparation method of high-strength powder austenitic stainless steel |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102317489A (en) * | 2007-10-04 | 2012-01-11 | 住友金属工业株式会社 | Austenitic stainless steel |
| CN109338247A (en) * | 2018-12-22 | 2019-02-15 | 中南大学 | A kind of cobalt improved austenitic stainless steel of copper zirconium and its process and heat treatment method |
-
2019
- 2019-09-24 CN CN201910903442.XA patent/CN110607490B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102317489A (en) * | 2007-10-04 | 2012-01-11 | 住友金属工业株式会社 | Austenitic stainless steel |
| CN109338247A (en) * | 2018-12-22 | 2019-02-15 | 中南大学 | A kind of cobalt improved austenitic stainless steel of copper zirconium and its process and heat treatment method |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112935265A (en) * | 2021-01-25 | 2021-06-11 | 北京科技大学 | Preparation method of high-strength powder austenitic stainless steel |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110607490B (en) | 2021-03-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104328353B (en) | A kind of rare-earth type 0Cr17Ni4Cu4Nb martensitic precipitations and preparation method thereof | |
| CN110484836B (en) | Hafnium zirconium titanium molybdenum reinforced austenitic stainless steel and preparation method thereof | |
| CN109136652B (en) | Nickel-based alloy large-section bar for nuclear power key equipment and manufacturing method thereof | |
| CN109112423A (en) | Special thick alloy-steel plate of a kind of superior low-temperature toughness and preparation method thereof | |
| CN102409258B (en) | Structural homogeneity control method of boron-containing high strength hydrogen resistant brittle alloy | |
| CN106566951A (en) | High-strength wear-resistant forging and production method thereof | |
| CN113263174A (en) | Manufacturing process for high-strength corrosion-resistant additive manufacturing stainless steel | |
| CN101768702A (en) | Medium-chromium ferrite stainless steel for automobile with high formability and acidic corrosion resistance as well as manufacturing method thereof | |
| CN114086075B (en) | High-nitrogen austenitic nickel-saving stainless steel and hot working method of high-performance welding heat affected zone thereof | |
| CN108642404B (en) | Fatigue-resistant corrosion-resistant twinning-induced plastic steel and preparation method thereof | |
| CN113106356B (en) | High-strength martensite precipitation hardening stainless steel and preparation method thereof | |
| CN110607490B (en) | Hafnium zirconium titanium reinforced austenitic stainless steel and preparation method thereof | |
| CN106563892A (en) | Corrosion-resisting austenitic stainless steel submerged-arc welding wire and production method thereof | |
| CN106563888A (en) | High-cost-performance submerged-arc welding wire and producing method thereof | |
| CN106566952A (en) | High temperature resistance forge piece with excellent nuclear power performance and production method thereof | |
| CN106566953A (en) | Corrosion-resisting alloy forge piece and production method thereof | |
| CN106319382B (en) | Chrome ferritic stainless steel and its manufacturing method in a kind of low-nickel type | |
| CN110004368A (en) | Improve the processing method with FCC crystal structure alloy intergranular corrosion resistance performance | |
| CN108342665B (en) | fixed steel for ocean drilling platform and production method thereof | |
| CN108193149B (en) | Carbon fiber reinforced alloy composite material and preparation method thereof | |
| CN106563889A (en) | Fracturing-preventing corrosion resistance austenite stainless steel submerged-arc welding wire and production method thereof | |
| CN100535167C (en) | High ductility nickel-free ferrite stainless steel and manufacturing method thereof | |
| CN115896611A (en) | Austenite-ferrite dual-phase heat-resistant steel and preparation method and application thereof | |
| CN114000027B (en) | UNS N08120 forged ring and manufacturing method thereof | |
| CN115121993A (en) | Preparation method of high-performance nickel-based alloy welding wire |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |