CN111763893A - Corrosion-resistant composite metal material and preparation method thereof - Google Patents
Corrosion-resistant composite metal material and preparation method thereof Download PDFInfo
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- CN111763893A CN111763893A CN202010669354.0A CN202010669354A CN111763893A CN 111763893 A CN111763893 A CN 111763893A CN 202010669354 A CN202010669354 A CN 202010669354A CN 111763893 A CN111763893 A CN 111763893A
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- 230000007797 corrosion Effects 0.000 title claims abstract description 53
- 238000005260 corrosion Methods 0.000 title claims abstract description 53
- 239000007769 metal material Substances 0.000 title claims abstract description 43
- 239000002131 composite material Substances 0.000 title claims abstract description 34
- 238000002360 preparation method Methods 0.000 title claims abstract description 12
- 229910001039 duplex stainless steel Inorganic materials 0.000 claims abstract description 29
- 239000002994 raw material Substances 0.000 claims abstract description 19
- 229910052758 niobium Inorganic materials 0.000 claims abstract description 11
- 229910052726 zirconium Inorganic materials 0.000 claims abstract description 11
- 229910052751 metal Inorganic materials 0.000 claims description 35
- 239000002184 metal Substances 0.000 claims description 35
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 26
- 238000001816 cooling Methods 0.000 claims description 20
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 16
- 238000000034 method Methods 0.000 claims description 11
- 229910000604 Ferrochrome Inorganic materials 0.000 claims description 10
- 229910052742 iron Inorganic materials 0.000 claims description 10
- 238000002844 melting Methods 0.000 claims description 10
- 230000008018 melting Effects 0.000 claims description 10
- 239000011572 manganese Substances 0.000 claims description 9
- 239000011651 chromium Substances 0.000 claims description 8
- 229910052759 nickel Inorganic materials 0.000 claims description 8
- 230000006698 induction Effects 0.000 claims description 7
- 239000006104 solid solution Substances 0.000 claims description 6
- 229910001309 Ferromolybdenum Inorganic materials 0.000 claims description 5
- 229910000592 Ferroniobium Inorganic materials 0.000 claims description 5
- 229910000519 Ferrosilicon Inorganic materials 0.000 claims description 5
- 229910001200 Ferrotitanium Inorganic materials 0.000 claims description 5
- XEQZXHPGUAHHPE-UHFFFAOYSA-N [Mn].[Ca].[Si] Chemical compound [Mn].[Ca].[Si] XEQZXHPGUAHHPE-UHFFFAOYSA-N 0.000 claims description 5
- SJKRCWUQJZIWQB-UHFFFAOYSA-N azane;chromium Chemical compound N.[Cr] SJKRCWUQJZIWQB-UHFFFAOYSA-N 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 5
- ZFGFKQDDQUAJQP-UHFFFAOYSA-N iron niobium Chemical compound [Fe].[Fe].[Nb] ZFGFKQDDQUAJQP-UHFFFAOYSA-N 0.000 claims description 5
- 239000007788 liquid Substances 0.000 claims description 5
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 claims description 5
- 230000008569 process Effects 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 238000005303 weighing Methods 0.000 claims description 5
- 229910052750 molybdenum Inorganic materials 0.000 claims description 4
- 238000003723 Smelting Methods 0.000 claims description 3
- 229910052799 carbon Inorganic materials 0.000 claims description 3
- 229910052748 manganese Inorganic materials 0.000 claims description 3
- 229910052757 nitrogen Inorganic materials 0.000 claims description 3
- 229910052698 phosphorus Inorganic materials 0.000 claims description 3
- 238000007872 degassing Methods 0.000 claims description 2
- 238000001035 drying Methods 0.000 claims description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims description 2
- 239000010955 niobium Substances 0.000 abstract description 11
- 229910001220 stainless steel Inorganic materials 0.000 abstract description 8
- 239000010935 stainless steel Substances 0.000 abstract description 8
- 239000010936 titanium Substances 0.000 abstract description 6
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 abstract description 5
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 abstract description 5
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 abstract description 5
- 229910052719 titanium Inorganic materials 0.000 abstract description 5
- 239000013078 crystal Substances 0.000 abstract description 2
- 238000007670 refining Methods 0.000 abstract description 2
- 230000000052 comparative effect Effects 0.000 description 11
- 238000012986 modification Methods 0.000 description 5
- 230000004048 modification Effects 0.000 description 5
- 229910001566 austenite Inorganic materials 0.000 description 4
- 229910000859 α-Fe Inorganic materials 0.000 description 4
- 239000000243 solution Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- TWRXJAOTZQYOKJ-UHFFFAOYSA-L Magnesium chloride Chemical compound [Mg+2].[Cl-].[Cl-] TWRXJAOTZQYOKJ-UHFFFAOYSA-L 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 229910052804 chromium Inorganic materials 0.000 description 2
- 238000002161 passivation Methods 0.000 description 2
- 239000011573 trace mineral Substances 0.000 description 2
- 235000013619 trace mineral Nutrition 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 description 1
- 229910001629 magnesium chloride Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Classifications
-
- 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
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/04—Removing impurities by adding a treating agent
- C21C7/06—Deoxidising, e.g. killing
-
- 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
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/004—Heat treatment of ferrous alloys containing Cr and Ni
-
- 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
- C22C38/001—Ferrous alloys, e.g. steel alloys containing N
-
- 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
- C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
-
- 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
-
- 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
-
- 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
- C21D2211/001—Austenite
-
- 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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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Abstract
The invention provides a corrosion-resistant composite metal material, and belongs to the technical field of metal materials. The feed comprises the following raw materials in parts by weight: ti: 0.07 to 0.15 wt%, Nb: 0.02 to 0.03 wt%, Zr: 0.01 to 0.02 wt%, 2205 duplex stainless steel: 99.8 to 99.9 wt%. The invention also provides a preparation method of the corrosion-resistant composite metal material. Based on the existing 2205 duplex stainless steel, the invention adds quantitative titanium, niobium and zirconium microelements, has the function of refining crystal grains, can obviously improve the corrosion resistance of the 2205 duplex stainless steel, can embody more mechanical properties, and avoids that the 2205 duplex stainless steel generates harmful precipitated phases at the temperature of 500-1000 ℃ to reduce the mechanical properties of the stainless steel and further reduce the corrosion resistance.
Description
Technical Field
The invention belongs to the technical field of metal materials, and particularly relates to a corrosion-resistant composite metal material and a preparation method thereof.
Background
The solid solution structure of the duplex stainless steel contains ferrite and austenite, has the characteristics of both ferrite and austenite, has excellent corrosion resistance, and plays an important role in various fields of production and life.
The excellent corrosion resistance of the duplex stainless steel is mainly determined by solid solution ferrite, austenite structures and two similar phases, harmful precipitated phases can obviously reduce the corrosion resistance of the duplex stainless steel, and the duplex stainless steel mainly contains abundant alloy elements, and the addition of complex alloy elements such as Cr, Mo and the like can cause the duplex stainless steel to contain two phases of ferrite and austenite and can also generate a plurality of intermetallic harmful precipitated phases under a proper temperature condition.
2205 duplex stainless steel is the most widely used duplex stainless steel at present due to its excellent corrosion resistance and comprehensive mechanical properties. However, 2205 duplex stainless steel can generate harmful precipitated phases in a certain temperature range, which can cause the mechanical property of the stainless steel to be reduced, and more importantly, the precipitated phases can easily cause the corrosion resistance of the stainless steel to be reduced, thereby causing damage to the material.
Disclosure of Invention
The invention aims to provide a corrosion-resistant composite metal material and a preparation method thereof aiming at the defects in the prior art.
The first purpose of the invention is to provide a corrosion-resistant composite metal material, which comprises the following raw materials in parts by weight: ti: 0.07 to 0.15 wt%, Nb: 0.02 to 0.03 wt%, Zr: 0.01 to 0.02 wt%, 2205 duplex stainless steel: 99.8 to 99.9 wt%.
Preferably, the 2205 duplex stainless steel comprises the following components in percentage by mass: cr: 21.0-23.0 wt%, Ni: 4.5-6.5 wt%, Mo: 2.5-3.5 wt%, Mn: 2.0 wt% or less, Si: less than or equal to 1.0 wt%, N: 0.08-0.2 wt%, P: less than or equal to 0.03 wt%, S: less than or equal to 0.02 wt%, C: less than or equal to 0.03wt percent, and the balance being Fe.
The second object of the present invention is to provide a method for preparing a corrosion-resistant composite metal material,
the method comprises the following steps: weighing pure iron and ferrochrome, putting the pure iron and ferrochrome into a medium-frequency induction furnace, electrifying and melting, then sequentially adding metal nickel, metal manganese, chromium nitride, ferrosilicon, ferromolybdenum, ferrotitanium, ferroniobium and ferrozirconium, and continuously melting to form a metal liquid; heating the molten metal to 1550-1600 ℃, and then sequentially carrying out deoxidation treatment and deslagging treatment;
and then pouring the molten metal into a mold, cooling the molten metal to room temperature in an air cooling mode, carrying out solid solution treatment at 1100-1150 ℃ for 3-5 hours, and then cooling the molten metal in a water cooling mode to obtain the corrosion-resistant composite metal material.
Preferably, all the required raw materials are subjected to oil removal, degassing, rust removal and drying treatment before being added into the medium-frequency induction furnace for smelting.
Preferably, a silicon-calcium-manganese deoxidizer is selected in the deoxidation treatment process, and the addition amount of the deoxidizer is 0.2-0.3% of the total weight of the raw materials.
Preferably, the required raw material usage is calculated by Matlab software, wherein the Cr burning loss rate is calculated according to 4%, the Si burning loss rate is calculated according to 20%, the Mn burning loss rate is calculated according to 18%, and other elements are calculated according to no burning loss.
Compared with the prior art, the invention has the beneficial effects that:
the invention provides a corrosion-resistant composite metal material, which is based on the existing 2205 duplex stainless steel, is added with quantitative titanium, niobium and zirconium microelements, has the function of refining crystal grains, can obviously improve the corrosion resistance of the 2205 duplex stainless steel, and avoids that the mechanical property of the stainless steel is reduced and the corrosion resistance is reduced because harmful precipitated phases are generated in the 2205 duplex stainless steel at the temperature of 500-1000 ℃. Meanwhile, the mechanical property of 2205 duplex stainless steel can be effectively improved.
Detailed Description
In order to make the technical solutions of the present invention better understood and enable those skilled in the art to practice the present invention, the following embodiments are further described, but the present invention is not limited to the following embodiments.
The 2205 duplex stainless steel used in the following examples has a composition and mass percentages of 22.36 wt% Cr, 5.21 wt% Ni, 3.18 wt% Mo, 1.37 wt% Mn, 0.65 wt% Si, 0.15 wt% N, 0.014 wt% P, 0.0008 wt% S, 0.03 wt% C, and the balance Fe; meanwhile, the required raw material usage is calculated by Matlab software, wherein the Cr burning loss rate is calculated according to 4%, the Si burning loss rate is calculated according to 20%, the Mn burning loss rate is calculated according to 18%, and other elements are calculated according to no burning loss.
Example 1
The corrosion-resistant composite metal material comprises the following raw materials in parts by weight: ti: 0.07%, Nb: 0.02 wt%, Zr: 0.01 wt%, 2205 duplex stainless steel: 99.9 wt%;
the adopted 2205 duplex stainless steel comprises 22.36 wt% of Cr, 5.21 wt% of Ni, 3.18 wt% of Mo, 1.37 wt% of Mn, 0.65 wt% of Si, 0.15 wt% of N, 0.014 wt% of P, 0.0008 wt% of S, 0.03 wt% of C and the balance of Fe by mass percent.
The preparation method of the corrosion-resistant composite metal material comprises the following steps:
weighing pure iron and ferrochrome, putting the pure iron and ferrochrome into a medium-frequency induction furnace, electrifying and melting, then sequentially adding metal nickel, metal manganese, chromium nitride, ferrosilicon, ferromolybdenum, ferrotitanium, ferroniobium and ferrozirconium, and continuously melting to form a metal liquid; then heating the molten metal to 1550 ℃, and then sequentially carrying out deoxidation treatment and deslagging treatment; wherein, a silicon-calcium-manganese deoxidizer is selected in the deoxidation treatment process, and the addition amount is 0.2 percent of the total weight of all the raw materials;
and then pouring the molten metal into a mold, cooling the molten metal to room temperature in an air cooling mode, carrying out solution treatment at 1100 ℃ for 5 hours, and then cooling the molten metal in a water cooling mode to obtain the corrosion-resistant composite metal material.
Example 2
The corrosion-resistant composite metal material comprises the following raw materials in parts by weight: ti: 0.15%, Nb: 0.03 wt%, Zr: 0.02 wt%, 2205 duplex stainless steel: 99.8 wt%;
the adopted 2205 duplex stainless steel comprises 22.36 wt% of Cr, 5.21 wt% of Ni, 3.18 wt% of Mo, 1.37 wt% of Mn, 0.65 wt% of Si, 0.15 wt% of N, 0.014 wt% of P, 0.0008 wt% of S, 0.03 wt% of C and the balance of Fe by mass percent.
The preparation method of the corrosion-resistant composite metal material comprises the following steps:
weighing pure iron and ferrochrome, putting the pure iron and ferrochrome into a medium-frequency induction furnace, electrifying and melting, then sequentially adding metal nickel, metal manganese, chromium nitride, ferrosilicon, ferromolybdenum, ferrotitanium, ferroniobium and ferrozirconium, and continuously melting to form a metal liquid; then heating the molten metal to 1600 ℃, and then sequentially carrying out deoxidation treatment and deslagging treatment; wherein, a silicon-calcium-manganese deoxidizer is selected in the deoxidation treatment process, and the addition amount is 0.3 percent of the total weight of all the raw materials;
and then pouring the molten metal into a mold, cooling the molten metal to room temperature in an air cooling mode, carrying out solid solution treatment at 1150 ℃ for 3 hours, and then cooling the molten metal in a water cooling mode to obtain the corrosion-resistant composite metal material.
Example 3
The corrosion-resistant composite metal material comprises the following raw materials in parts by weight: ti: 0.15%, Nb: 0.02 wt%, Zr: 0.02 wt%, 2205 duplex stainless steel: 99.8 wt%;
the adopted 2205 duplex stainless steel comprises 22.36 wt% of Cr, 5.21 wt% of Ni, 3.18 wt% of Mo, 1.37 wt% of Mn, 0.65 wt% of Si, 0.15 wt% of N, 0.014 wt% of P, 0.0008 wt% of S, 0.03 wt% of C and the balance of Fe by mass percent.
The preparation method of the corrosion-resistant composite metal material comprises the following steps:
weighing pure iron and ferrochrome, putting the pure iron and ferrochrome into a medium-frequency induction furnace, electrifying and melting, then sequentially adding metal nickel, metal manganese, chromium nitride, ferrosilicon, ferromolybdenum, ferrotitanium, ferroniobium and ferrozirconium, and continuously melting to form a metal liquid; then heating the molten metal to 1580 ℃, and then sequentially carrying out deoxidation treatment and deslagging treatment; wherein, a silicon-calcium-manganese deoxidizer is selected in the deoxidation treatment process, and the addition amount is 0.2 percent of the total weight of all the raw materials;
and then pouring the molten metal into a mold, cooling the molten metal to room temperature in an air cooling mode, carrying out solid solution treatment at 1120 ℃ for 4 hours, and then cooling the molten metal in a water cooling mode to obtain the corrosion-resistant composite metal material.
Comparative example 1
Same as example 1, except that: ti is not added in the raw materials of the corrosion-resistant composite metal material; nb; zr. The preparation method is the same as that of example 1.
Comparative example 2
Same as example 1, except that: only Ti is added into the raw materials of the corrosion-resistant composite metal material. The preparation method is the same as that of example 1.
Comparative example 3
Same as example 1, except that: only Nb is added into the raw materials of the corrosion-resistant composite metal material. The preparation method is the same as that of example 1.
The corrosion-resistant composite metal material provided by the embodiments 1 to 3 of the invention is based on the existing 2205 duplex stainless steel, and is added with quantitative titanium, niobium and zirconium microelements, so that the corrosion-resistant composite metal material has the function of grain refinement, and meanwhile, the corrosion-resistant composite metal material is produced by adopting better smelting.
In order to illustrate various performances of the corrosion-resistant composite metal materials provided by the examples 1 to 3, the performances of the examples 1 to 3 are tested, and meanwhile, the comparative examples 1 to 3 are used as a comparison group, and specific performance effects are shown in tables 1 to 3.
Wherein, the corrosion resistance test is a chemical immersion pitting corrosion test according to GB/T17897 stainless steel ferric trichloride pitting corrosion test method. According to GB/T17898 method for testing the stress corrosion of stainless steel in boiling magnesium chloride solution.
TABLE 1 Corrosion rates of metallic materials provided in examples 1 to 3 and comparative examples 1 to 3
| Corrosion rate V (g/m)2h) | |
| Example 1 | 0.061 |
| Example 2 | 0.053 |
| Example 3 | 0.065 |
| Comparative example 1 | 0.29 |
| Comparative example 2 | 0.15 |
| Comparative example 3 | 0.23 |
TABLE 2 stress corrosion Properties of the metallic materials provided in examples 1 to 3 and comparative examples 1 to 3
As can be seen from tables 1-2, the corrosion rates of the corrosion-resistant composite metal materials provided in examples 1-3 are lower than those of examples 1-3, and the stress corrosion cracking time of the metal materials provided in examples 1-3 is longer than that of examples 1-3, which indicates that after a certain amount of trace elements of titanium, niobium and zirconium are added, the metal materials have a significant passivation tendency, the repair capability of a passivation film is enhanced, and the metal materials have a certain mechanical stability.
TABLE 3 mechanical Properties of metallic materials provided in examples 1 to 3 and comparative examples 1 to 3
As can be seen from Table 3, the corrosion-resistant composite metal materials provided in examples 1 to 3 have better mechanical properties than the metal materials provided in comparative examples 1 to 3. The method has the advantages that after the trace elements of titanium, niobium and zirconium are added in a certain amount, harmful precipitated phases of the duplex stainless steel are avoided in the temperature range of 500-1000 ℃, the corrosion resistance of the stainless steel is enhanced, and the mechanical property of the stainless steel is effectively improved.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (6)
1. The corrosion-resistant composite metal material is characterized by comprising the following raw materials in parts by weight: ti: 0.07 to 0.15 wt%, Nb: 0.02 to 0.03 wt%, Zr: 0.01 to 0.02 wt%, 2205 duplex stainless steel: 99.8 to 99.9 wt%.
2. The corrosion-resistant composite metal material according to claim 1, wherein the 2205 duplex stainless steel comprises the following components in percentage by mass: cr: 21.0-23.0 wt%, Ni: 4.5-6.5 wt%, Mo: 2.5-3.5 wt%, Mn: 2.0 wt% or less, Si: less than or equal to 1.0 wt%, N: 0.08-0.2 wt%, P: less than or equal to 0.03 wt%, S: less than or equal to 0.02 wt%, C: less than or equal to 0.03wt percent, and the balance being Fe.
3. A method of making the corrosion resistant composite metal material of claim 1, comprising the steps of:
weighing pure iron and ferrochrome, putting the pure iron and ferrochrome into a medium-frequency induction furnace, electrifying and melting, then sequentially adding metal nickel, metal manganese, chromium nitride, ferrosilicon, ferromolybdenum, ferrotitanium, ferroniobium and ferrozirconium, and continuously melting to form a metal liquid; heating the molten metal to 1550-1600 ℃, and then sequentially carrying out deoxidation treatment and deslagging treatment;
and then pouring the molten metal into a mold, cooling the molten metal to room temperature in an air cooling mode, carrying out solid solution treatment at 1100-1150 ℃ for 3-5 hours, and then cooling the molten metal in a water cooling mode to obtain the corrosion-resistant composite metal material.
4. The method for preparing the corrosion-resistant composite metal material according to claim 3, wherein all the required raw materials are subjected to oil removal, degassing, rust removal and drying treatment before being added into the medium-frequency induction furnace for smelting.
5. The preparation method of the corrosion-resistant composite metal material according to claim 3, wherein a silicon-calcium-manganese deoxidizer is selected in the deoxidation treatment process, and the addition amount of the deoxidizer is 0.2-0.3% of the total weight of the raw materials.
6. The method of claim 3, wherein the required amounts of the raw materials are calculated by Matlab software, wherein the Cr burn-out rate is calculated as 4%, the Si burn-out rate is calculated as 20%, the Mn burn-out rate is calculated as 18%, and the other elements are calculated as no burn-out.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010669354.0A CN111763893A (en) | 2020-07-13 | 2020-07-13 | Corrosion-resistant composite metal material and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114395739A (en) * | 2022-01-22 | 2022-04-26 | 福州大学 | Niobium-titanium composite reinforced duplex stainless steel and preparation method thereof |
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| CN110983164A (en) * | 2019-12-31 | 2020-04-10 | 福州大学 | Microalloy element Nb-reinforced duplex stainless steel and preparation method thereof |
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| CN1514885A (en) * | 2001-06-11 | 2004-07-21 | �����Ƹ���ʽ���� | Double phase stainless steel strip for steel belt |
| EP1652950A1 (en) * | 2003-07-22 | 2006-05-03 | Sumitomo Metal Industries, Ltd. | Martensitic stainless steel |
| CN102356173A (en) * | 2009-03-19 | 2012-02-15 | 新日铁住金不锈钢株式会社 | Duplex stainless steel plate having excellent press moldability |
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| CN110983164A (en) * | 2019-12-31 | 2020-04-10 | 福州大学 | Microalloy element Nb-reinforced duplex stainless steel and preparation method thereof |
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