CN108486506B - Preparation method and application of high-performance low-density steel plate - Google Patents
Preparation method and application of high-performance low-density steel plate Download PDFInfo
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- CN108486506B CN108486506B CN201810551305.XA CN201810551305A CN108486506B CN 108486506 B CN108486506 B CN 108486506B CN 201810551305 A CN201810551305 A CN 201810551305A CN 108486506 B CN108486506 B CN 108486506B
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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
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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
- C21D8/02—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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- 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
- C21D8/02—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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- 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
- C21D8/02—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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- 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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- 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
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
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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
- C22C38/34—Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of silicon
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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
- C22C38/46—Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium
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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
- C22C38/48—Ferrous alloys, e.g. steel alloys containing chromium with nickel with niobium or tantalum
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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
- C22C38/50—Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
Abstract
The invention discloses a preparation method and application of a high-performance low-density steel plate, belonging to the field of metal materials and metallurgy; adopting a metal material containing a limited weight of C, Mn, Al, Si, Ni, Cr, V, Mo, Ti, Nb, S, P, and the balance of Fe and inevitable impurities; mixing the ball-milled tungsten carbide and iron powder with a molten metal material, and then carrying out homogenization treatment, multi-pass hot rolling deformation and quenching distribution treatment to prepare the alloy; the low-density steel plate prepared by the method has high strength, good wear resistance and light weight, can be widely applied to the fields of automobiles, aerospace, ships and the like, is beneficial to reducing the emission of gases such as carbon dioxide and the like, and is more environment-friendly; the invention has simple production process, short production procedure and is beneficial to industrialized popularization without cold rolling process.
Description
Technical Field
The invention belongs to the field of metal materials and metallurgy, and particularly relates to a preparation method and application of a low-density steel plate with high strength and high wear resistance.
Background
However, the pollution caused by the automobile, such as carbon monoxide, nitric oxide, carbon dioxide and the like, is one of the main pollution sources of urban environment and atmospheric environment, and the trend is still worsening, and in order to save energy consumption and reduce the emission of harmful gases of the automobile, one of the most important ways is to reduce the weight of the automobile, reports indicate that the weight of the automobile is reduced by 10%, the fuel consumption is reduced by 6% -8%, and the fuel consumption is reduced by 1L, the emission of 2.45Kg of carbon dioxide is reduced, which is greatly beneficial to energy conservation and environmental protection.
There are two approaches to reducing the weight of automobiles. The first is to reduce the weight of the automobile by increasing the strength and reducing the thickness by using high-strength steel, and although the weight is reduced by thinning, since the rigidity of some parts of the automobile is inhibited from being reduced, the thickness of the steel is limited, and acoustic problems occur and passengers feel uncomfortable, so that attention is now paid to the second method: the method of reducing the density of the automobile can reduce the weight of the automobile, for example, the aluminum alloy material with lower density can obviously reduce the density of the automobile and save energy consumption, but because the aluminum alloy has high price and difficult control of machinability and weldability, the aluminum alloy is not widely used and industrially produced, so people begin to form iron-aluminum alloy with iron and aluminum to reduce the density so as to avoid reducing the thickness, and the iron-aluminum alloy has received wide attention due to excellent mechanical properties and lower density.
Through the literature search of the prior art, patent 201380019217.0 discloses a high-strength, non-crystal-gap and low-density steel and a preparation method thereof, wherein the steel comprises the following components in percentage by mass: up to 0.01% C; up to 0.2% Si; up to 1.0% Mn; from 6% up to 9% Al; at most 0.010% N; up to 0.080% Ti; at most 0.080% Nb; up to 0.1% Zr; up to 0.1% V; up to 0.01% S; up to 0.1% P; up to 0.01% of B; the balance being iron and unavoidable impurities. The high-strength non-crystal-gap low-density steel is prepared by casting, heating, hot rolling, winding, cold rolling, continuous annealing and hot-dip galvanizing.
Patent 201510383428.3 discloses a ferrite low-density high-strength steel and a manufacturing method thereof, wherein the ferrite low-density high-strength steel comprises the following chemical components in percentage by mass: c: 0.05-0.40%, Mn: 4.0-12.0%, Al: 3.0-7.0%, P is less than or equal to 0.02%, S is less than or equal to 0.01%, N is less than or equal to 0.01%, and the balance of Fe and inevitable impurity elements, and the low-density high-strength steel plate is prepared by casting, hot rolling, annealing after hot rolling, pickling, cold rolling and annealing after cold rolling.
Patent 201510107144.1 discloses a low-density Fe-Mn-Al-C cold-rolled steel plate for automobiles and a preparation method thereof, the invention comprises the following chemical components by mass percent: 0.65-0.75% of C, 14.0-19.0% of Mn, 7.0-10.5% of Al, less than 0.003% of P, less than 0.002% of S, and the balance of Fe and inevitable impurities. The preparation process comprises the following steps: smelting, forging, heating a steel billet, carrying out multi-pass hot rolling deformation, coiling, carrying out solid solution treatment, water quenching treatment, cold rolling and annealing treatment, and preparing the low-density Fe-Mn-Al-C cold-rolled steel plate for the automobile.
Although the steel prepared by the above patents has low density and good mechanical properties, the wear resistance is poor, and the preparation process is complex, which is not beneficial to industrial popularization.
Disclosure of Invention
The invention aims to overcome the defects of high density and poor wear resistance of the existing steel, and provides a high-strength, high-wear-resistance and low-density steel plate and a preparation method thereof. In particular, Mn, Al, Si and other elements with lower density are added in the smelting process of steel, so that the density of the steel is reduced; and the mixed powder of tungsten carbide and iron powder after ball milling is added, so that the wear resistance of the steel is enhanced, the requirements of the steel for the automobile industry are met, the weight of the automobile is reduced, the energy consumption is reduced, the emission of harmful gas is reduced, and the energy-saving and environment-friendly effects are achieved.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a preparation method of a high-performance low-density steel plate comprises the following steps:
a) the weight percentages are as follows: c: 0.2% -1.0%, Mn: 4.0% -16.0%, Al: 3.0% -12.0%, Si: 0.2% -2.0%, Ni: 0.1-1.2%, Cr: 0.1-0.8%, V:0.01% -0.5%, Mo: 0.1-0.3%, Ti: 0.01 to 0.2 percent, Nb: 0.01-0.07%, S is less than or equal to 0.03%, P is less than or equal to 0.03%, and the balance is Fe and inevitable impurities, and the metal material containing the components and the content thereof is weighed.
b) And putting all weighed metals into a high-temperature smelting furnace to be melted.
c) Putting tungsten carbide and iron powder into a ball mill for ball milling, adding the ball milled powder into molten metal liquid, fully stirring, and pouring to obtain an ingot; the mass ratio of the iron to the tungsten carbide is 45-50: 1; the ratio of the total weight of the metal material to the total weight of the iron powder and the tungsten carbide is 10-15: 1.
d) Preheating the cast ingot, forging the cast ingot into a slab, and then carrying out homogenization treatment.
e) Performing multi-pass hot rolling deformation with the accumulated deformation amount of 80-92%, then performing water quenching to 200-300 ℃, and winding the hot rolled strip.
f) And carrying out quenching distribution treatment on the hot rolled strip.
Preferably, the smelting temperature in the high-temperature smelting furnace is 1500-.
Preferably, the ball milling parameters are as follows: the ball-material ratio is 5: 1-7: 1, the rotating speed is 300-500r/min, and the ball milling time is 4-5 h.
Preferably, the mass ratio of the iron to the tungsten carbide is 49: 1.
Preferably, the powder after ball milling is blown into the molten metal by a nitrogen powder blower, and the air pressure is 0.2 to 0.5 MPa.
Preferably, the multi-pass hot rolling deformation is carried out, wherein the initial rolling temperature of the hot rolling is 1000-1180 ℃, the final rolling temperature is 850-900 ℃, and the rolling is carried out for 4-6 passes.
Preferably, the hot rolled strip is subjected to a quenching distribution treatment: the temperature is kept for 1-2h at 850-1150 ℃, then water quenching is carried out until the temperature is 10-20 ℃ higher than the temperature at which martensite transformation occurs, element distribution is carried out for 5-10min, and then air cooling is carried out.
The high-performance low-density steel plate can be applied to the manufacturing process of automobiles.
The high-performance low-density steel plate material prepared by the invention comprises the following main components in percentage by mass: 0.2% -1.0%, Mn: 4.0% -16.0%, Al: 3.0% -12.0%, Si: 0.2% -2.0%, Ni: 0.1-1.2%, Cr: 0.1-0.8%, V0.01-0.5%, Mo: 0.1-0.3%, Ti: 0.01 to 0.2 percent, Nb: 0.01-0.07%, S is less than or equal to 0.03%, P is less than or equal to 0.03%, and the balance is Fe and inevitable impurities. Wherein C is an important solid solution strengthening and austenite stabilizing element, and can remarkably improve the yield strength and the tensile strength of the steel plate. Mn increases austenite stability and promotes austenite formation, decreases critical cooling rate at the time of quenching steel and improves hardenability of steel and plasticity of steel, and can reduce the density of steel. The addition of the Al element can obviously reduce the density of the steel plate, and a certain amount of Al can obviously improve the heat deformation resistance of the steel and simultaneously increase the corrosion resistance of the steel. When Si exists in solid solution in steel, the strength and hardness of the steel can be significantly improved, and the corrosion resistance can also be improved. Ni is an austenite stabilizing element, can inhibit grain coarsening at high temperatures, and can improve hardenability of steel. Cr and Mo can refine the grain structure and suppress grain coarsening at the time of hot working. V has the functions of fine grain strengthening and precipitation strengthening, and improves the thermal stability of the structure. Ti combines with C, N to form Ti (C, N), TiN, and TiC, which can refine the as-cast structure and inhibit grain coarsening during hot working. Nb has the function of fine grain strengthening, and improves the toughness of the steel while improving the strength of the steel. The biggest harm of S is to cause cracking, namely hot brittleness, of steel during hot processing and also to cause hot cracks of steel castings under the action of casting stress, so that the content of S is less than or equal to 0.03 percent as a harmful element. Although P has a strong solid solution strengthening effect, the strength and hardness of the steel are obviously enhanced, but the toughness of the steel, particularly the low-temperature toughness, namely cold brittleness, is severely reduced, so that the content of P is less than or equal to 0.03 percent. In the preparation process, the WC is introduced into the steel, so that the strength of the steel plate is improved, the wear resistance of the steel plate is obviously improved, the requirements of the modern automobile industry are met, and the industrial popularization is facilitated.
WC is hexagonal crystal, has the characteristics of high hardness, high melting point, good wear resistance, small thermal expansion coefficient and the like, and has stable chemical properties. And the wetting angle with the molten steel is almost zero. Because the molten iron has good forming performance and is completely wetted with the tungsten carbide particles, almost all steel materials can be used as the matrix of the tungsten carbide reinforced particles. The present technology therefore adds WC as reinforcement to the molten metal bath. The steel sheet is improved in wear resistance.
The low-density steel plate prepared by the invention has high strength and good wear resistance, is beneficial to large-scale industrial production, can be widely applied to the fields of automobiles, aerospace, ships and the like, is beneficial to reducing the emission of gases such as carbon dioxide and the like, and is more environment-friendly.
Compared with the prior art, the invention has the following beneficial effects:
compared with the prior art, the invention describes a preparation method of a high-strength, high-wear-resistance and low-density steel plate, which comprises the steps of casting, rolling, heat treatment and the like. By adding lighter elements such as Mn, Al, Si and the like, the density of the steel is obviously reduced, and the comprehensive mechanical property and the wear resistance of the steel are also obviously improved by adding WC.
1) The invention adopts the design of low carbon, high aluminum and high manganese content, reduces the density of the steel plate on the basis of ensuring the excellent comprehensive mechanical property of the steel plate, has obvious weight reduction effect and low production cost.
2) The low-density steel plate prepared by the invention has good wear resistance and corrosion resistance.
3) The invention has simple production process, short production procedure and is beneficial to industrialized popularization without cold rolling process.
4) The high-strength, high-wear-resistance and low-density steel plate prepared by the invention has the low density and excellent mechanical properties, so that the steel plate can be widely applied to the fields of automobiles, ships and aerospace, and the weight is reduced, so that the consumption reduction and emission reduction are promoted, and the steel plate is more environment-friendly.
Detailed Description
The technical solutions of the present invention are described in detail below with reference to examples, but the scope of protection is not limited thereto.
Example 1
According to the following percentage: c: 0.5%, Mn: 10.0%, Al: 8.0%, Si: 1.2%, Ni: 0.66%, Cr: 0.4%, V:0.2%, Mo: 0.15%, Ti: 0.1%, Nb: 0.02%, S: 0.01%, P: 0.01 percent, and the balance of Fe and inevitable impurities, and weighing the metal material containing the components and the contents thereof.
And 2, putting all metals into a high-temperature smelting furnace to be molten, wherein the smelting temperature is 1500 ℃.
And 3, putting the WC and the iron powder into a ball mill for ball milling, wherein the ball milling parameters are as follows: the ball-material ratio is 5:1, the rotating speed is 380r/min, and the ball milling time is 4 h. Iron: the mass ratio of WC was 49: 1. The ratio of the total weight of the metal material to the total weight of the iron powder and the tungsten carbide is 10: 1; and (3) blowing in by a nitrogen powder blowing machine with the air pressure of 0.25MPa, fully stirring, refining, degassing and pouring to obtain the cast ingot.
And 4, forging the blank after preheating.
And 5, preserving heat for 5 hours at the temperature of 1100 ℃. And carrying out homogenization treatment.
And 6, carrying out hot rolling deformation for 4-6 times, wherein the initial rolling temperature of hot rolling is 1000 ℃, the final rolling temperature is 860 ℃, the accumulated deformation is 85%, then carrying out water quenching to 250 ℃, and winding the hot rolled strip.
And 7, carrying out quenching distribution treatment on the steel: keeping the temperature at 950 ℃ for 1h, then quenching the mixture to 400 ℃ with water, distributing the elements for 5min, and then cooling the mixture in air. Finally obtaining the steel plate with high strength, high wear resistance and low density.
Example 2
According to the following percentage: c: 0.8%, Mn: 12.0%, Al: 10.0%, Si: 1.0%, Ni: 0.8%, Cr: 0.6%, V:0.3%, Mo: 0.1%, Ti: 0.1%, Nb: 0.02%, S: 0.02%, P: 0.02% and the balance of Fe and inevitable impurities, and weighing the metal material containing the components and the contents thereof.
And 2, putting all metals into a high-temperature smelting furnace to be molten, wherein the smelting temperature is 1550 ℃.
And 3, putting the WC and the iron powder into a ball mill for ball milling, wherein the ball milling parameters are as follows: the ball-material ratio is 7:1, the rotating speed is 500r/min, and the ball milling time is 5 h. Iron: the mass ratio of WC is 45: 1; the ratio of the total weight of the metal material to the total weight of the iron powder and the tungsten carbide is 15: 1; and (3) blowing in by a nitrogen powder blowing machine with the air pressure of 0.5MPa, fully stirring, refining, degassing and pouring to obtain the cast ingot.
And 4, forging the blank after preheating.
And 5, preserving heat for 3 hours at the temperature of 1200 ℃. And carrying out homogenization treatment.
And 6, carrying out hot rolling deformation for 4-6 times, wherein the initial rolling temperature of the hot rolling is 1100 ℃, the final rolling temperature is 880 ℃, the accumulated deformation is 80%, then carrying out water quenching to 250 ℃, and winding the hot rolled strip.
And 7, carrying out quenching distribution treatment on the steel: keeping the temperature at 1050 ℃ for 1.6h, then quenching the mixture to 380 ℃ with water, distributing the elements for 8min, and then cooling the mixture in air. Finally obtaining the steel plate with high strength, high wear resistance and low density.
Example 3
According to the following percentage: c: 0.2%, Mn: 16.0%, Al: 3.0%, Si: 2.0%, Ni: 0.1%, Cr: 0.8%, V:0.01%, Mo: 0.3%, Ti: 0.01%, Nb: 0.01%, S: 0.03%, P: 0.03 percent, the balance being Fe and inevitable impurities, and weighing the metal material containing the components and the contents thereof.
And 2, putting all metals into a high-temperature smelting furnace to be molten, wherein the smelting temperature is 1530 ℃.
And 3, putting the WC and the iron powder into a ball mill for ball milling, wherein the ball milling parameters are as follows: the ball-material ratio is 6:1, the rotating speed is 450r/min, and the ball milling time is 5 h. Iron: the mass ratio of WC is 50: 1; the ratio of the total weight of the metal material to the total weight of the iron powder and the tungsten carbide is 12: 1; and (3) blowing in by a nitrogen powder blowing machine with the air pressure of 0.4MPa, fully stirring, refining, degassing and pouring to obtain the cast ingot.
And 4, forging the blank after preheating.
And 5, preserving heat for 3 hours at the temperature of 1150 ℃. And carrying out homogenization treatment.
And 6, carrying out hot rolling deformation for 4-6 times, wherein the initial rolling temperature of hot rolling is 1180 ℃, the final rolling temperature is 880 ℃, the accumulated deformation is 80%, then carrying out water quenching to 250 ℃, and winding the hot rolled strip.
And 7, carrying out quenching distribution treatment on the steel: keeping the temperature at 1050 ℃ for 1.6h, then quenching the mixture to 380 ℃ with water, distributing the elements for 8min, and then cooling the mixture in air. Finally obtaining the steel plate with high strength, high wear resistance and low density.
Example 4
According to the following percentage: c: 2.0%, Mn: 4.0%, Al: 12.0%, Si: 0.2%, Ni: 1.2%, Cr: 0.1%, V:0.5%, Mo: 0.1%, Ti: 0.2%, Nb: 0.07%, S: 0.02%, P: 0.03 percent, the balance being Fe and inevitable impurities, and weighing the metal material containing the components and the contents thereof.
And 2, putting all metals into a high-temperature smelting furnace to be molten, wherein the smelting temperature is 1550 ℃.
And 3, putting the WC and the iron powder into a ball mill for ball milling, wherein the ball milling parameters are as follows: the ball-material ratio is 7:1, the rotating speed is 500r/min, and the ball milling time is 5 h. Iron: the mass ratio of WC is 49: 1; the ratio of the total weight of the metal material to the total weight of the iron powder and the tungsten carbide is 13: 1; and (3) blowing in by a nitrogen powder blowing machine with the air pressure of 0.5MPa, fully stirring, refining, degassing and pouring to obtain the cast ingot.
And 4, forging the blank after preheating.
And 5, preserving heat for 3 hours at the temperature of 1150 ℃. And carrying out homogenization treatment.
And 6, carrying out hot rolling deformation for 4-6 times, wherein the initial rolling temperature of the hot rolling is 1100 ℃, the final rolling temperature is 880 ℃, the accumulated deformation is 85%, then carrying out water quenching to 250 ℃, and winding the hot rolled strip.
And 7, carrying out quenching distribution treatment on the steel: keeping the temperature at 1050 ℃ for 1h, then quenching the mixture to 380 ℃ with water, distributing the elements for 10min, and then cooling the mixture in air. Finally obtaining the steel plate with high strength, high wear resistance and low density.
While the invention has been described in further detail with reference to specific preferred embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (6)
1. The preparation method of the high-performance low-density steel plate is characterized by comprising the following steps of:
a) the weight percentages are as follows: c: 0.2% -1.0%, Mn: 4.0% -16.0%, Al: 3.0% -12.0%, Si: 0.2% -2.0%, Ni: 0.1-1.2%, Cr: 0.1-0.8%, V:0.01% -0.5%, Mo: 0.1-0.3%, Ti: 0.01 to 0.2 percent, Nb: 0.01-0.07 percent of S, less than or equal to 0.03 percent of P, and the balance of Fe and inevitable impurities, and weighing the metal material containing the components and the content thereof;
b) putting all weighed metals into a high-temperature smelting furnace to be melted;
c) putting tungsten carbide and iron powder into a ball mill for ball milling, adding the ball milled powder into molten metal liquid, fully stirring, and pouring to obtain an ingot; the mass ratio of the iron to the tungsten carbide is 45-50: 1; the ratio of the total weight of the metal material to the total weight of the iron powder and the tungsten carbide is 10-15: 1;
d) preheating the cast ingot, forging the cast ingot into a slab and then carrying out homogenization treatment;
e) performing multi-pass hot rolling deformation, wherein the accumulated deformation is 80-92%, then performing water quenching to 200-300 ℃, and winding the hot rolled strip;
f) carrying out quenching distribution treatment on the hot rolled strip;
the hot rolled strip is subjected to quenching distribution treatment: the temperature is kept for 1-2h at 850-1150 ℃, then water quenching is carried out until the temperature is 10-20 ℃ higher than the temperature at which martensite transformation occurs, element distribution is carried out for 5-10min, and then air cooling is carried out.
2. The method as claimed in claim 1, wherein the smelting temperature in the high temperature smelting furnace is 1500-.
3. The method for preparing a high-performance low-density steel plate according to claim 1, wherein the ball milling parameters are as follows: the ball-material ratio is 5-7:1, the rotating speed is 300-.
4. The method of claim 2, wherein the mass ratio of iron to tungsten carbide is 49: 1.
5. The method of claim 1, wherein the ball-milled powder is blown into the molten metal by a nitrogen blower at a pressure of 0.2 to 0.5 MPa.
6. The method as claimed in claim 1, wherein the hot rolling deformation is performed for a plurality of passes, wherein the initial rolling temperature of the hot rolling is 1000-1180 ℃, the final rolling temperature is 850-900 ℃, and the rolling is performed for 4-6 passes.
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| DE102019104597A1 (en) * | 2019-02-22 | 2020-08-27 | Salzgitter Flachstahl Gmbh | Steel product made from lightweight structural steel containing manganese with a high energy absorption capacity in the event of sudden loads and low temperatures and the process for its manufacture |
| CN109746549A (en) * | 2019-03-20 | 2019-05-14 | 昆明理工大学 | A kind of high-strength light welded steel technique |
| CN112877606B (en) * | 2021-01-12 | 2022-03-08 | 钢铁研究总院 | Ultrahigh-strength full-austenite low-density steel and preparation method thereof |
| CN115090384A (en) * | 2022-07-14 | 2022-09-23 | 江苏首盾耐磨材料有限公司 | Wear-resistant steel ball for ball mill |
| CN115354231B (en) * | 2022-08-31 | 2023-03-28 | 武汉钢铁有限公司 | Low-density corrosion-resistant spring flat steel and production method thereof |
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| CN103820735B (en) * | 2014-02-27 | 2016-08-24 | 北京交通大学 | A kind of superhigh intensity C-Al-Mn-Si system low density steel and preparation method thereof |
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