CN113337783A - Production method of barium-cleaned iron-chromium-aluminum alloy - Google Patents
Production method of barium-cleaned iron-chromium-aluminum alloy Download PDFInfo
- Publication number
- CN113337783A CN113337783A CN202110610336.XA CN202110610336A CN113337783A CN 113337783 A CN113337783 A CN 113337783A CN 202110610336 A CN202110610336 A CN 202110610336A CN 113337783 A CN113337783 A CN 113337783A
- Authority
- CN
- China
- Prior art keywords
- barium
- alloy
- percent
- furnace
- chromium
- 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.)
- Pending
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 24
- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 16
- -1 iron-chromium-aluminum Chemical compound 0.000 title claims abstract description 16
- 239000000956 alloy Substances 0.000 claims abstract description 37
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 34
- 229910000600 Ba alloy Inorganic materials 0.000 claims abstract description 24
- 238000007670 refining Methods 0.000 claims abstract description 20
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 16
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 13
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 13
- 238000003723 Smelting Methods 0.000 claims abstract description 12
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 12
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 10
- 239000000463 material Substances 0.000 claims abstract description 10
- 238000005097 cold rolling Methods 0.000 claims abstract description 9
- 238000000137 annealing Methods 0.000 claims abstract description 8
- 239000012535 impurity Substances 0.000 claims abstract description 8
- 229910052761 rare earth metal Inorganic materials 0.000 claims abstract description 8
- 150000002910 rare earth metals Chemical class 0.000 claims abstract description 8
- 238000005275 alloying Methods 0.000 claims abstract description 5
- 239000002994 raw material Substances 0.000 claims abstract description 5
- 238000005303 weighing Methods 0.000 claims abstract description 5
- 229910000519 Ferrosilicon Inorganic materials 0.000 claims abstract description 4
- 239000002253 acid Substances 0.000 claims abstract description 4
- 238000007664 blowing Methods 0.000 claims abstract description 4
- 229910052791 calcium Inorganic materials 0.000 claims abstract description 4
- 239000011575 calcium Substances 0.000 claims abstract description 4
- 238000005266 casting Methods 0.000 claims abstract description 4
- 230000010485 coping Effects 0.000 claims abstract description 4
- 238000005261 decarburization Methods 0.000 claims abstract description 4
- 238000004806 packaging method and process Methods 0.000 claims abstract description 4
- 238000005096 rolling process Methods 0.000 claims abstract description 4
- 238000010008 shearing Methods 0.000 claims abstract description 4
- 239000002893 slag Substances 0.000 claims abstract description 4
- 238000003756 stirring Methods 0.000 claims abstract description 4
- 238000005406 washing Methods 0.000 claims abstract description 4
- 229910052788 barium Inorganic materials 0.000 claims description 16
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 8
- 229910016066 BaSi Inorganic materials 0.000 claims description 7
- 229910052799 carbon Inorganic materials 0.000 claims description 7
- 229910000975 Carbon steel Inorganic materials 0.000 claims description 5
- 239000010962 carbon steel Substances 0.000 claims description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 4
- 229910052742 iron Inorganic materials 0.000 claims description 4
- 241001062472 Stokellia anisodon Species 0.000 claims description 3
- 229910052746 lanthanum Inorganic materials 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 claims description 2
- 239000010935 stainless steel Substances 0.000 claims description 2
- 229910001220 stainless steel Inorganic materials 0.000 claims description 2
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 description 13
- 239000011651 chromium Substances 0.000 description 10
- 230000003647 oxidation Effects 0.000 description 9
- 238000007254 oxidation reaction Methods 0.000 description 9
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 8
- 229910052593 corundum Inorganic materials 0.000 description 8
- 239000011572 manganese Substances 0.000 description 8
- 229910001845 yogo sapphire Inorganic materials 0.000 description 8
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 6
- 229910000831 Steel Inorganic materials 0.000 description 6
- 230000003749 cleanliness Effects 0.000 description 6
- 239000010959 steel Substances 0.000 description 6
- 238000009749 continuous casting Methods 0.000 description 5
- 239000013078 crystal Substances 0.000 description 5
- 239000007789 gas Substances 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- 238000002485 combustion reaction Methods 0.000 description 4
- 238000002844 melting Methods 0.000 description 4
- 230000024121 nodulation Effects 0.000 description 4
- 238000011160 research Methods 0.000 description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 229910052681 coesite Inorganic materials 0.000 description 3
- 229910052906 cristobalite Inorganic materials 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000011888 foil Substances 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 239000010703 silicon Substances 0.000 description 3
- 239000000377 silicon dioxide Substances 0.000 description 3
- 229910052682 stishovite Inorganic materials 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 229910052905 tridymite Inorganic materials 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 230000005496 eutectics Effects 0.000 description 2
- 239000004615 ingredient Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000004584 weight gain Effects 0.000 description 2
- 235000019786 weight gain Nutrition 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 229910000604 Ferrochrome Inorganic materials 0.000 description 1
- 229910000914 Mn alloy Inorganic materials 0.000 description 1
- QRSFFHRCBYCWBS-UHFFFAOYSA-N [O].[O] Chemical compound [O].[O] QRSFFHRCBYCWBS-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- VNNRSPGTAMTISX-UHFFFAOYSA-N chromium nickel Chemical compound [Cr].[Ni] VNNRSPGTAMTISX-UHFFFAOYSA-N 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 238000004925 denaturation Methods 0.000 description 1
- 230000036425 denaturation Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
- 230000023556 desulfurization Effects 0.000 description 1
- 230000003009 desulfurizing effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- PYLLWONICXJARP-UHFFFAOYSA-N manganese silicon Chemical compound [Si].[Mn] PYLLWONICXJARP-UHFFFAOYSA-N 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000010310 metallurgical process Methods 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 229910001120 nichrome Inorganic materials 0.000 description 1
- 229910052758 niobium Inorganic materials 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000010587 phase diagram Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 238000009991 scouring Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 229910002058 ternary alloy Inorganic materials 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 229910052721 tungsten Inorganic materials 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
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
-
- 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
- C21C7/0006—Adding metallic additives
-
- 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
- C21C7/0056—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00 using cored wires
-
- 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
- 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
- C21C7/068—Decarburising
-
- 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
- C21C7/10—Handling in a vacuum
-
- 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
- C22C38/005—Ferrous alloys, e.g. steel alloys containing rare earths, i.e. Sc, Y, Lanthanides
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Abstract
The invention provides a production method of barium-cleaned iron-chromium-aluminum alloy, which comprises the following steps: s1, using an alloy containing Si, Mn and Cr to prepare materials, and adding the materials into a smelting furnace as smelting raw materials to be smelted; s2, performing vacuum decarburization in an AOD furnace or a VOD furnace to ensure that C is less than or equal to 0.05 wt%, and adding ferrosilicon for pre-deoxidation; s3, continuously smelting to enable Si, Mn and Cr to reach a preset range; s4, adding aluminum ingots for final deoxidation, performing sufficient soft blowing, and adjusting the content of Al in the refining furnace to control the content of Al to be between 5 and 8.5 weight percent; s5, weighing barium alloy, adding the barium alloy into a refining furnace to enable the weight percentage of Ba to be 0.010-0.5%, and fully stirring; s6, adsorbing and removing impurities by using high-calcium refining slag; s7, adding La into a refining furnace to carry out rare earth alloying, so that the weight percentage of the La is 0.03-0.15%; s8, continuously casting, hot continuous rolling, annealing, acid washing, coping, cold rolling, intermediate annealing, cold rolling, longitudinal shearing, straightening and drawing, and packaging to obtain the product.
Description
Technical Field
The invention relates to a manufacturing method of alloy, in particular to a production method for improving the cleanliness of alloy by adopting barium element to carry out denaturation treatment on inclusions on iron-chromium-aluminum alloy.
Background
Currently, the three types of metal support materials considered suitable for use in exhaust gas purifiers for internal combustion engines are NiCr, FeCrAl and FeMoW. The FeCrAl high-temperature alloy has relatively low thermal expansion coefficient, strong high-temperature oxidation resistance and relatively low production cost, and has the best application prospect in comprehensive consideration of processing performance, economic value and the like. In the working process of the tail gas purifier, the carrier of the purifier is subject to the scouring of the tail gas discharged by the internal combustion engine, and the tests of severe conditions such as thermal cycle, thermal fatigue and thermal shock with the temperature difference of hundreds of degrees are carried out, so that the metal carrier is required to have good high-temperature oxidation resistance. The Al is helpful to form uniform and continuous Al on the surface of the alloy2O3And the film improves the high-temperature oxidation resistance of the alloy. Therefore, the metallic carrier of the tail gas purifier usually adopts FeCrAl alloy, and the mass fraction of Al in the alloy is usually more than 3%.
On the other hand, the rare earth can obviously improve the high-temperature oxidation resistance and the service life of the FeCrAl alloy, and the FeCrAl alloy of the tail gas purifier of the internal combustion engine is also produced by adopting a rare earth microalloying technology. Due to the high Al content and the application of rare earth, the production difficulty of the FeCrAl alloy foil is very high, most of high-temperature FeCrAl alloy foils required by the production of the internal combustion engine exhaust purifier in China are imported from Japan and Germany, the price is as high as 7-10 ten thousand yuan/ton, the research and development and the production of the automobile exhaust purifier in China are severely restricted, and the progress of atmospheric control is hindered.
The conventional FeCrAl alloy is smelted by an induction furnace, the problems of poor alloy cleanliness, high cost and the like exist, and an electric furnace-VOD-LF refining-flat blank continuous casting-hot rolling-cold rolling process production flow is developed to produce alloy foils for the purpose of adapting to mass production of high-quality FeCrAl, wherein the core of the invention is to develop a new process technology aiming at the problems of high aluminum content and poor cleanliness of iron-chromium-aluminum alloy, and the problems of large particle inclusion and poor cleanliness are solved.
Disclosure of Invention
In order to solve the technical problems that the quality of FeCrAl alloy products is poor and continuous production is difficult, the invention provides a production method of barium-cleaned iron-chromium-aluminum alloy.
The invention adopts the following technical scheme:
a barium-cleaned iron-chromium-aluminum alloy comprises the following components in percentage by weight: less than or equal to 0.05 percent of C, 5.0-8.50 percent of Al, 17-25 percent of Cr, 0.03-0.15 percent of La, less than or equal to 1.0 percent of Si, less than or equal to 1.0 percent of Mn, 0.010-0.5 percent of Ba and the balance of iron.
A production method of barium-cleaned iron-chromium-aluminum alloy comprises the following steps:
s1, using an alloy containing Si, Mn and Cr to prepare materials, and adding the materials serving as smelting raw materials into a smelting furnace for smelting, wherein the carbon content is up to 0.5 wt% during the preparation;
s2, performing vacuum decarburization in an AOD furnace or a VOD furnace, enabling C in the smelted alloy to be less than or equal to 0.05% according to the weight percentage, and adding ferrosilicon for pre-deoxidation;
s3, continuing to smelt to enable Si, Mn and Cr to reach a preset range, wherein the Si is less than or equal to 1.0 percent, the Mn is less than or equal to 1.0 percent, and the Cr is 17-25 percent;
s4, adding aluminum ingots for final deoxidation, performing sufficient soft blowing, and adjusting the content of Al in the refining furnace to control the weight percentage of Al between 5% and 8.5%;
s5, weighing barium alloy, adding the barium alloy into a refining furnace to enable the weight percentage of Ba to be 0.010-0.5%, and fully stirring;
s6, adsorbing and removing impurities by using high-calcium refining slag;
s7, adding La into a refining furnace to carry out rare earth alloying, so that the weight percentage of the La is 0.03-0.15%;
s8, continuously casting, hot continuous rolling, annealing, acid washing, coping, cold rolling, intermediate annealing, cold rolling, longitudinal shearing, straightening and drawing, and packaging to obtain the product.
Further, in step S5, the barium alloy is added into the refining furnace in the form of a cored wire, the cored wire is made by wrapping a carbon steel or stainless steel sheet and the barium alloy is cored.
Further, the barium alloy at least comprises one of BaSi, BaCaSi and BaSiAl.
Furthermore, the cored wire takes carbon steel as a sheath and barium alloy as a core.
Still further, the barium alloy is BaSi.
Compared with the prior art, the invention has the beneficial effects that:
the invention develops a barium alloy cleaning technology from the aspect of improving the cleanliness of the alloy, and firstly, the oxygen content in the alloy is reduced through the cleanliness improvement, so that the yield of the rare earth alloy is improved; secondly, due to barium to Al2O3The inclusion is denatured, which is beneficial to Al in the alloy2O3The inclusion is reduced, and the condition is created for preventing the continuous casting nozzle from nodulation and realizing the batch continuous casting production; thirdly, Al in the alloy2O3The impurities are reduced, and the residual large-particle Al in the use process of the carrier is prevented2O3The continuity of the compact oxide film is destroyed, thereby improving the high-temperature oxidation resistance of the alloy.
Detailed Description
The present invention is further described with reference to the following examples, which are provided for illustration only and are not to be construed as limiting the scope of the claims, and other alternatives which may occur to those skilled in the art are also within the scope of the claims.
Example 1
A production method of barium-cleaned iron-chromium-aluminum alloy comprises the following steps:
s1, weighing pure iron, medium carbon ferrochrome and silicon-manganese alloy ingredients to enable the carbon content to reach 0.5%, and adding the ingredients into a smelting furnace as smelting raw materials for smelting;
s2, carrying out vacuum decarburization in an AOD furnace, enabling C in the smelted alloy to be less than or equal to 0.05% according to the weight percentage, and adding ferrosilicon for pre-deoxidation, wherein the step can also be carried out in a VOD furnace;
s3, continuing to smelt to enable Si, Mn and Cr to reach a preset range, wherein the Si is less than or equal to 1.0 percent, the Mn is less than or equal to 1.0 percent, and the Cr is 17-25 percent;
s4, adding aluminum ingots for final deoxidation, performing sufficient soft blowing, and adjusting the content of Al in the refining furnace to control the weight percentage of Al between 5% and 8.5%;
s5, weighing barium alloy, adding the barium alloy into a refining furnace to enable the weight percentage of Ba to be 0.010% -0.5%, fully stirring, adding the barium alloy in the form of an alloy cored wire, wherein the cored wire is made by wrapping carbon steel and wrapping BaSi;
s6, adsorbing and removing impurities by using high-calcium refining slag;
s7, adding La into a refining furnace to carry out rare earth alloying, so that the weight percentage of the La is 0.03-0.15%;
s8, continuously casting, hot continuous rolling, annealing, acid washing, coping, cold rolling, intermediate annealing, cold rolling, longitudinal shearing, straightening and drawing, and packaging to obtain the product.
The 3-furnace alloy prepared by the production method has stable liquid level of the crystallizer in the continuous casting process of the 3-furnace alloy in the production process, and no nodulation phenomenon occurs, so that the problem of nodulation in the continuous casting process of the traditional production process is solved, and the component content of the obtained 3-furnace alloy is shown in table 1.
TABLE 1 barium alloyed steel composition, wt.%
| Serial number | C | Si | Mn | Cr | P | S | Al | La | Ba | T.[O] | Fe |
| 1 | 0.05 | 0.60 | 0.40 | 22.32 | 0.015 | 0.010 | 7.25 | 0.05 | 0.010 | 0.0009 | Surplus |
| 2 | 0.03 | 0.72 | 0.43 | 22.07 | 0.018 | 0.010 | 7.18 | 0.07 | 0.020 | 0.0011 | Surplus |
| 3 | 0.04 | 0.65 | 0.45 | 22.19 | 0.015 | 0.010 | 7.7 | 0.06 | 0.015 | 0.0010 | Surplus |
The results of dimensional measurement and property measurement of the above 3-furnace alloy are shown in table 2.
TABLE 2 alloy strip, mechanical properties and oxidative weight gain
| Serial number | Thickness/mm | Tensile strength/(N mm)-2) | Oxidation weight gain/(g/m)2) |
| 1 | 0.06 | 1150/1140 | 12 |
| 2 | 0.08 | 1130/1140 | 12 |
| 3 | 0.10 | 1150/1150 | 13 |
The barium alloy deoxidization research shows that the barium has strong deoxidization and desulfurization capacities, and the barium can adjust the density and the melting point of the inclusion, improve the adhesion and the wettability of molten steel to the inclusion and the metal contact surface energy, so that the inclusion is easy to discharge. The invention adopts barium alloy to Al2O3The principle of the invention is to utilize the property of Ba element, so that the barium alloys BaSi, BaCaSi and BaSiAl can be added as raw materials.
In 2014, united metal manufacturing limited of otokumpp germany designed a FeCrAl alloy having improved high temperature strength, low chromium evaporation rate and good workability, whose main chemical components were Al: 2.0-4.5%, Cr: 12% -25%, W: 1.0% -4%, Nb: 0.25 to 2.0 percent. The FeCrAl is typically JFE20-5USR steel manufactured by JFE company and Aluchrom Y Hf steel manufactured by VDM company at present. Table 3 lists the major components of both companies and table 4 lists the dimensional and mechanical property requirements of the metallic support material.
TABLE 3 chemical composition/% of JFE20-5USR steel, Aluchrom Y Hf steel
TABLE 4 size and mechanical Properties of the Metal support Material
The above researches have carried out a great deal of research work from the viewpoint of material design, and have achieved remarkable effects. However, the metallurgical process is a complex chemical reaction process, especially in the case of aluminum content of more than 5%, which inhibits the oxidation of aluminum and the reaction to Al2O3The modification treatment of the inclusions is the key for improving the high-temperature oxidation resistance, so that the invention firstly treats Al by adding barium element on the basis of referring to the research results of predecessors2O3The impurities are denatured to reduce large-particle Al2O3The impurities can damage the oxide film, and can inhibit the oxidation of aluminum and prevent the nodulation of the continuous casting nozzle. Because barium is a surface active element, the barium has the functions of deoxidizing, desulfurizing, refining crystal grains, changing the form of inclusions and improving the mechanical property of metal materials when being applied to metallurgy, in order to refine the crystal grains of the iron-chromium-aluminum alloy, the barium is selected as a crystal grain refining element, and the solubility of the barium in the alloy is considered. Therefore, the alloy composition is designed as follows: less than or equal to 0.05 percent of C, Al: 5.0-8.50%, Cr: 17% -25%, La: 0.03-0.15%, Si is less than or equal to 1.0%, Mn is less than or equal to 1.0%, Ba: 0.010-0.5% and the balance of iron.
The principle of the invention is mainly based on the following two points: one is that barium has a stronger deoxidizing power than aluminum, and the deoxidizing power of the three elements of silicon, aluminum and barium are compared as shown in table 5.
TABLE 5 comparison of deoxidizing capacities of silicon, aluminum and barium
| Deoxidizing agent | Deoxygenated product | Formula of equilibrium oxygen | Oxygen content (0.001% deoxidizer) |
| Si | SiO2 | [O]＝(5.441x10-3)/[Si]1/2 | 1.721x10-1 |
| Ba | BaO | [O]＝(8.151x10-8)/[Ba] | 8.151x10-5 |
| BaSi | BaO·SiO2 | [O]＝(4.876x10-6)/([Ba]1/3·[Si]1/3) | 9.385x10-4 |
| Al | Al2O3 | [O]＝(3.307x10-5/[Al]2/3 | 3.307x10-3 |
Secondly, the BaO-SiO is utilized2-Al2O3The low-melting point compound composition condition in ternary alloy phase diagram is controlled by silicon pre-deoxidation, aluminum final deoxidation and aluminum alloying, and finally barium alloy is used for modifying and cleaning the inclusion, wherein the low-melting point is sandwichedThe impurities are shown in Table 6.
TABLE 6 BaO-SiO2-Al2O3Composition of ternary low-melting point compound
| Temperature/. degree.C | Type of reaction | BaO/wt％ | SiO2/wt％ | Al2O3/wt％ |
| 1122±7 | Eutectic crystals | 35.2 | 55.3 | 9.5 |
| 1296±3 | Eutectic crystals | 19.0 | 66.0 | 15.0 |
| 1554±4 | Chemical combination | 26.0 | 47.0 | 27.0 |
It should be noted that the above-mentioned embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.
Claims (6)
1. The barium-cleaned iron-chromium-aluminum alloy is characterized in that: the alloy comprises the following components in percentage by weight: less than or equal to 0.05 percent of C, 5.0-8.50 percent of Al, 17-25 percent of Cr, 0.03-0.15 percent of La, less than or equal to 1.0 percent of Si, less than or equal to 1.0 percent of Mn, 0.010-0.5 percent of Ba and the balance of iron.
2. The method for producing the barium-cleaned iron-chromium-aluminum alloy according to claim 1, wherein the method comprises the following steps: the method comprises the following steps:
s1, using an alloy containing Si, Mn and Cr to prepare materials, and adding the materials serving as smelting raw materials into a smelting furnace for smelting, wherein the carbon content is up to 0.5 wt% during the preparation;
s2, performing vacuum decarburization in an AOD furnace or a VOD furnace, enabling C in the smelted alloy to be less than or equal to 0.05% according to the weight percentage, and adding ferrosilicon for pre-deoxidation;
s3, continuing to smelt to enable Si, Mn and Cr to reach a preset range, wherein the Si is less than or equal to 1.0 percent, the Mn is less than or equal to 1.0 percent, and the Cr is 17-25 percent;
s4, adding aluminum ingots for final deoxidation, performing sufficient soft blowing, and adjusting the content of Al in the refining furnace to control the weight percentage of Al between 5% and 8.5%;
s5, weighing barium alloy, adding the barium alloy into a refining furnace to enable the weight percentage of Ba to be 0.010-0.5%, and fully stirring;
s6, adsorbing and removing impurities by using high-calcium refining slag;
s7, adding La into a refining furnace to carry out rare earth alloying, so that the weight percentage of the La is 0.03-0.15%;
s8, continuously casting, hot continuous rolling, annealing, acid washing, coping, cold rolling, intermediate annealing, cold rolling, longitudinal shearing, straightening and drawing, and packaging to obtain the product.
3. The method for producing a barium-cleaned iron-chromium-aluminum alloy according to claim 2, wherein: in the step S5, the barium alloy is added into the refining furnace in the form of cored wire, the cored wire is made by wrapping carbon steel or stainless steel sheet and the barium alloy is used for core-wrapping.
4. The method for producing a barium-cleaned iron-chromium-aluminum alloy according to claim 2 or 3, characterized in that: the barium alloy at least comprises one of BaSi, BaCaSi and BaSiAl.
5. The method for producing a barium-cleaned iron-chromium-aluminum alloy according to claim 3, wherein: the cored wire takes carbon steel as a sheath and barium alloy as a core.
6. The method for producing a barium-cleaned iron-chromium-aluminum alloy according to claim 5, wherein: the barium alloy is BaSi.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110610336.XA CN113337783A (en) | 2021-06-01 | 2021-06-01 | Production method of barium-cleaned iron-chromium-aluminum alloy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110610336.XA CN113337783A (en) | 2021-06-01 | 2021-06-01 | Production method of barium-cleaned iron-chromium-aluminum alloy |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113337783A true CN113337783A (en) | 2021-09-03 |
Family
ID=77474489
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110610336.XA Pending CN113337783A (en) | 2021-06-01 | 2021-06-01 | Production method of barium-cleaned iron-chromium-aluminum alloy |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113337783A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114934152A (en) * | 2022-06-14 | 2022-08-23 | 山西太钢不锈钢股份有限公司 | Continuous casting method for stainless steel with high rare earth content |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4414023A (en) * | 1982-04-12 | 1983-11-08 | Allegheny Ludlum Steel Corporation | Iron-chromium-aluminum alloy and article and method therefor |
| JPH06116686A (en) * | 1992-10-06 | 1994-04-26 | Kawasaki Steel Corp | Fe-cr-al alloy excellent in oxidation resistance and foil thereof |
| JPH108214A (en) * | 1996-06-14 | 1998-01-13 | Sumitomo Metal Ind Ltd | Iron-chromium-aluminum cast steel product |
| CN1480549A (en) * | 2003-08-08 | 2004-03-10 | 钢铁研究总院 | Clean steel containing barium and its manufacturing method |
| US20070110609A1 (en) * | 2003-03-11 | 2007-05-17 | Heike Hattendorf | Iron-chromium-aluminum alloy |
| CN104726778A (en) * | 2015-03-25 | 2015-06-24 | 上海大学兴化特种不锈钢研究院 | Rare-earth La containing electrothermal alloy material having excellent high-temperature oxidation resistance |
-
2021
- 2021-06-01 CN CN202110610336.XA patent/CN113337783A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4414023A (en) * | 1982-04-12 | 1983-11-08 | Allegheny Ludlum Steel Corporation | Iron-chromium-aluminum alloy and article and method therefor |
| JPH06116686A (en) * | 1992-10-06 | 1994-04-26 | Kawasaki Steel Corp | Fe-cr-al alloy excellent in oxidation resistance and foil thereof |
| JPH108214A (en) * | 1996-06-14 | 1998-01-13 | Sumitomo Metal Ind Ltd | Iron-chromium-aluminum cast steel product |
| US20070110609A1 (en) * | 2003-03-11 | 2007-05-17 | Heike Hattendorf | Iron-chromium-aluminum alloy |
| CN1480549A (en) * | 2003-08-08 | 2004-03-10 | 钢铁研究总院 | Clean steel containing barium and its manufacturing method |
| CN104726778A (en) * | 2015-03-25 | 2015-06-24 | 上海大学兴化特种不锈钢研究院 | Rare-earth La containing electrothermal alloy material having excellent high-temperature oxidation resistance |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114934152A (en) * | 2022-06-14 | 2022-08-23 | 山西太钢不锈钢股份有限公司 | Continuous casting method for stainless steel with high rare earth content |
| CN114934152B (en) * | 2022-06-14 | 2024-01-05 | 山西太钢不锈钢股份有限公司 | Continuous casting method of stainless steel with high rare earth content |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110699599B (en) | Q345R steel for ultralow temperature and manufacturing method thereof | |
| US20230012944A1 (en) | Hot-Work Die Steel Electroslag Remelted Ingot and Manufacturing Method Thereof | |
| CN111485167A (en) | Hot-rolled round steel for rare earth microalloyed 25MnCrNiMoA coupler yoke and production method thereof | |
| CN115491575B (en) | High-carbon chromium wind power bearing steel and production process thereof | |
| CN114351060A (en) | Hot-rolled steel strip, preparation method thereof and application thereof in bimetal band saw backing material | |
| WO2021057954A9 (en) | Steel for alloy structure and manufacturing method therefor | |
| CN113913690B (en) | Steel for offshore wind power flange and preparation method thereof | |
| CN114107826B (en) | Nickel-based high-temperature alloy and preparation method thereof | |
| CN106563889A (en) | Fracturing-preventing corrosion resistance austenite stainless steel submerged-arc welding wire and production method thereof | |
| CN111893382B (en) | Food chain stainless steel and preparation method thereof | |
| CN113337783A (en) | Production method of barium-cleaned iron-chromium-aluminum alloy | |
| CN106563888A (en) | High-cost-performance submerged-arc welding wire and producing method thereof | |
| CN115922144A (en) | Austenitic stainless steel welding wire and preparation method thereof | |
| CN115667563B (en) | Precipitation hardening martensitic stainless steel sheet excellent in fatigue resistance | |
| CN114959429A (en) | Manufacturing method of steel 18CrNiMo7-6 for engineering machinery gear | |
| CN114737111A (en) | Steel for 5Ni and production method thereof | |
| CN113584350A (en) | High-temperature oxidation resistant cast high-tungsten-nickel-based alloy and preparation method thereof | |
| JPH07103447B2 (en) | High purity heat resistant steel | |
| JP3554283B2 (en) | Fe-Ni alloy excellent in surface properties and method for producing the same | |
| CN113151737B (en) | 08Ni3DR steel plate with hydrogen induced cracking resistance and manufacturing method thereof | |
| CN116121629B (en) | Preparation method of gear steel 18CrNiMo7-6 | |
| CN115029645B (en) | Wire rod for pressure container and preparation method | |
| JP2864964B2 (en) | Fe-Ni-based alloy cold rolled sheet excellent in plating property and solderability and method for producing the same | |
| EP4269627A1 (en) | Precipitation-hardened martensitic stainless steel having excellent fatigue-resistance characteristics | |
| JP4271311B2 (en) | Ferritic heat resistant steel |
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 | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210903 |