CN115747646A - Lining plate and production method thereof - Google Patents
Lining plate and production method thereof Download PDFInfo
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- CN115747646A CN115747646A CN202211390006.5A CN202211390006A CN115747646A CN 115747646 A CN115747646 A CN 115747646A CN 202211390006 A CN202211390006 A CN 202211390006A CN 115747646 A CN115747646 A CN 115747646A
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 22
- 229910000831 Steel Inorganic materials 0.000 claims description 37
- 239000010959 steel Substances 0.000 claims description 37
- 239000002699 waste material Substances 0.000 claims description 25
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 19
- 229910045601 alloy Inorganic materials 0.000 claims description 17
- 239000000956 alloy Substances 0.000 claims description 17
- 229910052761 rare earth metal Inorganic materials 0.000 claims description 17
- 239000007788 liquid Substances 0.000 claims description 16
- 229910000519 Ferrosilicon Inorganic materials 0.000 claims description 15
- 239000000203 mixture Substances 0.000 claims description 15
- 239000002006 petroleum coke Substances 0.000 claims description 13
- 238000001816 cooling Methods 0.000 claims description 12
- 150000002910 rare earth metals Chemical class 0.000 claims description 11
- 238000012986 modification Methods 0.000 claims description 10
- 230000004048 modification Effects 0.000 claims description 10
- 229910001200 Ferrotitanium Inorganic materials 0.000 claims description 8
- 238000010438 heat treatment Methods 0.000 claims description 8
- 238000002844 melting Methods 0.000 claims description 7
- 230000008018 melting Effects 0.000 claims description 7
- 229910052684 Cerium Inorganic materials 0.000 claims description 6
- 238000003723 Smelting Methods 0.000 claims description 6
- 238000000137 annealing Methods 0.000 claims description 6
- 229910052746 lanthanum Inorganic materials 0.000 claims description 6
- 229910052759 nickel Inorganic materials 0.000 claims description 6
- 229910000604 Ferrochrome Inorganic materials 0.000 claims description 5
- 229910000616 Ferromanganese Inorganic materials 0.000 claims description 5
- DALUDRGQOYMVLD-UHFFFAOYSA-N iron manganese Chemical compound [Mn].[Fe] DALUDRGQOYMVLD-UHFFFAOYSA-N 0.000 claims description 5
- 238000005266 casting Methods 0.000 claims description 4
- 229910052802 copper Inorganic materials 0.000 claims description 4
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- 238000005070 sampling Methods 0.000 claims description 4
- 238000012360 testing method Methods 0.000 claims description 4
- 239000006260 foam Substances 0.000 claims description 3
- 229910000734 martensite Inorganic materials 0.000 claims description 3
- 239000004576 sand Substances 0.000 claims description 3
- 229910001563 bainite Inorganic materials 0.000 claims description 2
- 229910052799 carbon Inorganic materials 0.000 abstract description 8
- 229910052804 chromium Inorganic materials 0.000 abstract description 7
- 229910052710 silicon Inorganic materials 0.000 abstract description 7
- 229910052796 boron Inorganic materials 0.000 abstract description 4
- 229910052748 manganese Inorganic materials 0.000 abstract description 3
- 229910052698 phosphorus Inorganic materials 0.000 abstract description 3
- 229910052717 sulfur Inorganic materials 0.000 abstract description 3
- 229910052742 iron Inorganic materials 0.000 abstract description 2
- 229910052702 rhenium Inorganic materials 0.000 abstract 1
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 8
- 239000011651 chromium Substances 0.000 description 7
- 230000000052 comparative effect Effects 0.000 description 7
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical group [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 6
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 6
- 239000010703 silicon Substances 0.000 description 6
- 229910000617 Mangalloy Inorganic materials 0.000 description 5
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 4
- 239000010949 copper Substances 0.000 description 4
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 3
- 239000011572 manganese Substances 0.000 description 3
- 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 description 3
- 239000000463 material Substances 0.000 description 3
- 229910052750 molybdenum Inorganic materials 0.000 description 3
- 239000011733 molybdenum Substances 0.000 description 3
- 229910000510 noble metal Inorganic materials 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 230000004580 weight loss Effects 0.000 description 3
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical group [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 2
- 229910001339 C alloy Inorganic materials 0.000 description 2
- 229910001018 Cast iron Inorganic materials 0.000 description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 239000010936 titanium Substances 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910000640 Fe alloy Inorganic materials 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 239000006004 Quartz sand Substances 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- XWHPIFXRKKHEKR-UHFFFAOYSA-N iron silicon Chemical compound [Si].[Fe] XWHPIFXRKKHEKR-UHFFFAOYSA-N 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 239000010970 precious metal Substances 0.000 description 1
- 239000012925 reference material Substances 0.000 description 1
- 238000005482 strain hardening Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Abstract
The invention discloses a lining plate and a production method thereof. The lining plate comprises the following components: 0.3 to 1.0 weight percent of C, 1.6 to 2.0 weight percent of Si, 2.1 to 2.5 weight percent of Mn, 0.3 to 1.5 weight percent of Cr, 0.01 to 0.10 weight percent of Ti, 0.002 to 0.01 weight percent of B, 0.03 to 0.1 weight percent of Re, 0.001 to 0.035 weight percent of P, 0.001 to 0.025 weight percent of S and 90 to 96 weight percent of Fe. The lining plate has good hardness, impact resistance and wear resistance.
Description
Technical Field
The invention relates to a lining plate and a production method thereof.
Background
The common ball mill lining plate is made of high manganese steels ZGMn13 and ZGMn13Cr2, and because the initial states of ZGMn13 and ZGMn13Cr2 are austenitic steels, the hardness is low, the ball mill lining plate has the characteristic of work hardening, and the effect of hardening can be achieved by means of impact of grinding balls and materials. However, the ball mill lining plate is mainly subjected to indirect impact of the grinding balls and materials falling from a high position on the accumulation layer, and the strengthening effect is not obvious due to small impact strength, so that the high manganese steel has insufficient wear resistance when used as the lining plate. Besides high manganese steel, widely used lining plate materials of the ball mill comprise low-medium carbon alloy wear-resistant steel, high-chromium cast iron and the like. The low-medium carbon alloy wear-resistant steel is usually added with noble metals such as nickel, molybdenum and the like, so that the production cost is high, and the popularization is not facilitated. The high-chromium cast iron has high production cost and is easy to deform and crack after high-temperature heat treatment.
CN103397275A discloses martensite series wear-resistant steel, which comprises the following components: c:0.05 to 0.51wt%, mn:2.0-10wt%, al:0-1.5wt%, si:0-1.5wt%, cr:0-1.5wt%, cu:0 to 1.5wt%, ni:0 to 1.5wt%, mo:0.02-0.50wt%, V0.02-0.50 wt%, nb 0.02-0.50wt%, ti 0.01-0.5wt%, B0.02-0.50 wt%, RE 0.02-0.50wt%; the balance being Fe and unavoidable impurities. The wear-resistant steel contains nickel, molybdenum and other precious metals.
CN111133122a discloses a low alloy steel sheet with excellent strength and ductility, comprising the following components in weight percent: 0.05% to 0.15% of C, 0.7% to 2.5% of Si, 8% to 9.9% of Mn, 13% to 15.0% of Cr, more than 0% and equal to or less than 1.0% of Cu, 0.1% to 0.2% of N, more than 0% and equal to or less than 0.25% of Al, more than 0% and equal to or less than 0.05% of Sn, and the balance of Fe and other unavoidable impurities. The wear-resistant steel contains elements such as copper, tin and the like.
Disclosure of Invention
In view of the above, it is an object of the present invention to provide a lining panel having excellent hardness, wear resistance and impact resistance.
Another object of the present invention is to provide a method for producing a lining plate, which uses scrap steel as the main raw material, and combines other cheaper alloys to obtain the lining plate.
The technical purpose is achieved through the following technical scheme.
In one aspect, the present invention provides a liner panel comprising the following components:
wherein Re consists of La and Ce, and the mass ratio of the La to the Ce is 1:1-3; the composition of the lining plate does not contain Cu, al, sn, mo, nb and Ni.
The lining panel according to the invention preferably consists of:
according to the lining plate of the present invention, preferably, the metallographic structure of the lining plate includes martensite and bainite.
The lining plate according to the invention preferably has a surface hardness of more than 53HRC and an impact toughness of more than 80J/cm 2 。
In another aspect, the present invention provides a method for producing a lining board, comprising the steps of:
(1) Smelting the waste steel in an intermediate frequency furnace in the presence of petroleum coke powder to obtain waste molten steel;
(2) Melting down the waste steel liquid, sampling, testing and determining the components of the waste steel liquid; if the components of the waste molten steel do not accord with preset values, implementing the step (3), otherwise, implementing the step (4);
(3) Adding ferrosilicon, ferromanganese, petroleum coke powder and ferrochrome into the waste molten steel to obtain a mixture;
(4) Adding ferrotitanium, ferroboron and rare earth ferrosilicon alloy into the mixture, and performing modification treatment in a ladle to obtain alloy liquid; wherein, the rare earth elements in the rare earth ferrosilicon alloy consist of La and Ce;
(5) Pouring the alloy liquid to obtain a blank;
(6) And (3) carrying out heat treatment on the blank at 900-980 ℃ for 1-6 h, placing the blank in air for cooling, naturally cooling to 20-70 ℃, then annealing at 200-500 ℃ for 2-6 h, and naturally cooling to obtain the lining plate.
According to the production method of the present invention, preferably, in the step (1), the melting temperature is 1500 to 1600 ℃.
According to the production method of the present invention, preferably, in the step (1), the petroleum coke powder is disposed at the bottom of the intermediate frequency furnace.
According to the production method of the present invention, it is preferable that in the step (4), the temperature of the modification treatment is 1550 to 1650 ℃.
According to the production method of the present invention, preferably, in the step (5), the casting temperature is 1500 to 1600 ℃, and the mold is a metal mold, a sand mold or a lost foam mold.
According to the production method of the present invention, preferably, in the step (4), ferrotitanium is used in an amount of 0.1 to 0.5wt%, ferroboron is used in an amount of 0.05 to 0.3wt%, and rare earth ferrosilicon is used in an amount of 0.1 to 0.5wt%, based on the total weight of the mixture.
The lining plate of the invention uses the scrap steel as the main raw material and does not use noble metal, thereby having lower production cost. In addition, the liner plate of the present invention has good hardness, impact resistance and wear resistance.
Detailed Description
The present invention will be further described with reference to the following specific examples, but the scope of the present invention is not limited thereto.
< liner plate >
The components of the lining plate comprise C, si, mn, cr, ti, B, re, S, P and Fe. Preferably, the composition of the backing plate does not contain Cu, al, sn, mo, nb, and Ni. The present inventors have found that liners of such composition have excellent hardness, impact resistance and wear resistance.
In the present invention, C represents a carbon element, and the content thereof may be 0.3 to 1.0wt%; preferably 0.35 to 0.8wt%; more preferably 0.4 to 0.6wt%. Carbon elements can increase the yield point and tensile strength of the liner. Too high a carbon content reduces the corrosion resistance of the lining plate.
In the present invention, si represents a silicon element, and its content may be 1.6 to 2.0wt%; preferably 1.7 to 1.9wt%, more preferably 1.75 to 1.85wt%. Silicon element can improve the hardness of the lining plate. Too high a silicon content can significantly reduce the wear and impact resistance of the liner.
In the present invention, mn represents a manganese element, and the content thereof may be 2.1 to 2.5wt%; preferably 2.2 to 2.4wt%; more preferably 2.34 to 2.38wt%. The manganese element can ensure that the lining plate has enough toughness and higher hardness, and improves the hardenability of the lining plate. Too high a manganese content can reduce the corrosion resistance of the liner.
In the present invention, cr represents a chromium element, and the content thereof may be 0.3 to 1.5wt%; preferably 0.5 to 1.0wt%; more preferably 0.56 to 0.8wt%. Chromium element can improve the hardness and the wear resistance of the lining plate. Too high a chromium content may reduce the plasticity and toughness of the liner.
In the present invention, ti represents a titanium element, and the content thereof may be 0.01 to 0.1wt%; preferably 0.02 to 0.08wt%; more preferably 0.05 to 0.06wt%. The titanium element can refine the grain structure of the lining plate, thereby improving the strength and the toughness of the lining plate.
In the present invention, B represents a boron element, and the content thereof may be 0.002 to 0.01wt%; preferably 0.003 to 0.008wt%; more preferably 0.005 to 0.006wt%. Boron element can improve the hardenability of the lining plate and can also improve the strength of the lining plate.
In the present invention, re represents a rare earth element, and the content thereof may be 0.03 to 0.1wt%; preferably 0.035 to 0.08wt%; more preferably 0.04 to 0.05wt%. The rare earth element changes the shape and distribution of inclusions in the lining plate and plays a role in alloying.
In the present invention, P represents a phosphorus element, and the content thereof may be 0.035wt% or less. In certain embodiments, the P content is 0.001wt% to 0.035wt%. Preferably, the P content is 0.001wt% to 0.025wt%. This ensures wear resistance and impact resistance of the lining plate.
In the present invention, S represents a sulfur element, and the content thereof may be 0.025wt% or less. In certain embodiments, the S content is from 0.001wt% to 0.025wt%. Preferably, the P content is 0.001wt% to 0.024wt%. This ensures wear resistance and impact resistance of the lining panel.
< method for producing Lining plate >
The production method of the lining plate comprises the following steps: (1) a smelting step; (2) a component detection step; (3) a component adjustment step; (4) a modification treatment step; a forming step and a heat treatment step (6). As described in detail below.
And (3) smelting the waste steel in an intermediate frequency furnace in the presence of petroleum coke powder to obtain waste molten steel. Smelting can be carried out by using an intermediate frequency furnace commonly used in the field. The petroleum coke powder can be arranged at the bottom of the intermediate frequency furnace. The smelting temperature can be 1500-1600 ℃; preferably 1550 ℃ to 1580 ℃.
And melting down the waste steel liquid, sampling, testing and determining the components of the waste steel liquid. Thus, the waste molten steel can meet the performance requirement of the lining plate. If the components of the waste molten steel do not meet the preset values, ferrosilicon, ferromanganese, petroleum coke powder and ferrochrome are added according to the requirements to adjust the contents of elements such as silicon, manganese, carbon, chromium and the like; otherwise, the content of elements such as silicon, manganese, carbon, chromium and the like does not need to be adjusted.
If the components of the waste molten steel do not accord with the preset values, the components need to be adjusted. And adding ferrosilicon, ferromanganese, petroleum coke powder and ferrochrome into the waste molten steel to obtain a mixture. And adding ferrotitanium, ferroboron and rare earth ferrosilicon alloy into the mixture, and performing modification treatment in a ladle to obtain an alloy liquid.
If the components of the waste molten steel meet the preset values, the components do not need to be adjusted. Ferrotitanium, ferroboron and rare earth ferrosilicon alloy are directly added into the waste molten steel and are subjected to modification treatment in a ladle.
In the steps, the rare earth element in the rare earth silicon-iron alloy consists of La and Ce, and the mass ratio of the La to the Ce can be 1:1-3; preferably, the mass ratio of La to Ce is 1.2-2.2. More preferably, the mass ratio of La to Ce is 1.5 to 2.
In the above steps, the temperature of modification treatment can be 1550-1650 ℃; preferably 1580-1600 ℃;
and pouring the alloy liquid to obtain a blank. The casting temperature may be 1500-1600 deg.c, preferably 1550-1580 deg.c. The casting mould can be a metal mould, a sand mould or a lost foam mould.
And (3) carrying out heat treatment on the blank, cooling the blank in air, naturally cooling the blank, annealing the blank, and naturally cooling the blank to obtain the lining plate. The heat treatment temperature may be 900 to 980 ℃, preferably 910 to 970 ℃, and more preferably 920 to 950 ℃. The heat treatment time may be 1 to 6 hours, preferably 2 to 5 hours, more preferably 2.5 to 3.5 hours. Naturally cooling to 20-70 deg.c, preferably 25-65 deg.c, and more preferably 40-60 deg.c. The annealing temperature may be 200 to 500 deg.C, preferably 220 to 380 deg.C, more preferably 300 to 350 deg.C. The annealing time may be 2 to 6 hours, preferably 3 to 5 hours, more preferably 3.5 to 4.5 hours.
The performance test method is described in detail below:
hardness of
The Rockwell hardness was determined according to GB/T230.1-2018.
Impact resistance
Impact toughness was determined according to GB/T229-1994.
Wear resistance
The sample, the cast ball and 10-mesh quartz sand were mixed and put into a drum having a diameter of 1m and a length of 500cm, and the drum was rotated for 24 hours to measure the weight loss value of the sample. The high manganese steel ZGMn13 was used as a reference material and had a wear resistance value of 1.
Abrasion resistance = ZGMn13 weight loss value/specimen weight loss value
Example 1
(1) Placing the scrap steel in an intermediate frequency furnace in the presence of petroleum coke powder to be smelted at 1560 ℃, wherein the petroleum coke powder is positioned at the bottom of the furnace, and carbureting is carried out while melting to obtain waste molten steel;
(2) Melting down the waste steel liquid, sampling and testing, determining the components of the waste steel liquid, and then adding ferrosilicon, ferromanganese, petroleum coke powder and ferrochrome to adjust the content of elements such as silicon, manganese, carbon, chromium and the like to a preset value to obtain a mixture;
(3) Adding ferrotitanium, ferroboron and rare earth ferrosilicon alloy into the mixture, and performing modification treatment in a steel ladle at 1580 ℃ to obtain alloy liquid. The rare earth element Re in the rare earth ferrosilicon alloy is La and Ce; wherein, the mass ratio of La to Ce is 1.5;
(4) Pouring the alloy liquid at 1550 ℃ by using a metal mold to obtain a blank;
(5) And (3) carrying out heat treatment on the blank at 930 ℃ for 3h, naturally cooling to 50 ℃, then annealing at 300 ℃ for 4h, and cooling to obtain the lining plate.
Comparative example 1
The same process as in example 1 is repeated except that the raw materials of ferrotitanium and ferroboron of the lining plate are equivalently replaced by noble metals of nickel and molybdenum.
Comparative example 2
Example 1 was repeated except that the Ti content, B content and Re content in the substrate were 0.005wt%, 0.001wt% and 0.01wt%, respectively.
Comparative example 3
Example 1 was repeated, except that the Ti content in the backing sheet was 0.12wt%, the B content was 0.015wt%, and the Re content was 0.12 wt%.
The compositions of the liners obtained in example 1 and comparative examples 1 to 3 are shown in table 1. The results of the performance tests are shown in table 2.
TABLE 1
TABLE 2
| Serial number | Hardness (HRC) | Impact resistance (J/cm) 2 ) | Wear resistance |
| Example 1 | 54 | 83 | 1.80 |
| Comparative example 1 | 32 | 38 | 1.83 |
| Comparative example 2 | 33 | 42 | 1.56 |
| Comparative example 3 | 53 | 11 | 1.73 |
| High manganese steel ZGMn13 | <30 | 186 | 1 |
| High manganese steel ZGMn13Cr2 | <30 | 203 | 1.13 |
The present invention is not limited to the above-described embodiments, and any variations, modifications, and substitutions which may occur to those skilled in the art may be made without departing from the spirit of the invention.
Claims (10)
1. A liner panel, comprising the following components:
wherein Re consists of La and Ce, and the mass ratio of the La to the Ce is 1:1-3; the composition of the lining plate does not contain Cu, al, sn, mo, nb and Ni.
2. The liner panel of claim 1, consisting of:
3. the liner according to claim 1 or 2, wherein the metallurgical structure of the liner comprises martensite and bainite.
4. A liner according to any one of claims 1 to 3, having a surface hardness of greater than 53HRC and a surface impact toughness of greater than 80J/cm 2 。
5. A production method of a liner plate is characterized by comprising the following steps:
(1) Smelting the waste steel in an intermediate frequency furnace in the presence of petroleum coke powder to obtain waste molten steel;
(2) Melting down the waste steel liquid, sampling, testing and determining the components of the waste steel liquid; if the components of the waste molten steel do not accord with preset values, implementing the step (3), otherwise, implementing the step (4);
(3) Adding ferrosilicon, ferromanganese, petroleum coke powder and ferrochrome into the waste molten steel to obtain a mixture;
(4) Adding ferrotitanium, ferroboron and rare earth ferrosilicon alloy into the mixture, and performing modification treatment in a steel ladle to obtain alloy liquid; wherein, the rare earth elements in the rare earth ferrosilicon alloy consist of La and Ce;
(5) Pouring the alloy liquid to obtain a blank;
(6) And (3) carrying out heat treatment on the blank at 900-980 ℃ for 1-6 h, placing the blank in air for cooling, naturally cooling to 20-70 ℃, then annealing at 200-500 ℃ for 2-6 h, and naturally cooling to obtain the lining plate.
6. The production method according to claim 5, wherein in the step (1), the melting temperature is 1500 to 1600 ℃.
7. The production method according to claim 5, wherein in the step (1), the petroleum coke powder is disposed at the bottom of the intermediate frequency furnace.
8. The production method according to claim 6, wherein in the step (4), the temperature of the modification treatment is 1550 to 1650 ℃.
9. The production process according to any one of claims 5 to 8, wherein in the step (5), the casting temperature is 1500 to 1600 ℃ and the mold is a metal mold, a sand mold or a lost foam mold.
10. The production method according to claim 5, wherein in the step (4), the ferrotitanium is used in an amount of 0.1 to 0.5wt%, the ferroboron is used in an amount of 0.05 to 0.3wt%, and the rare earth ferrosilicon is used in an amount of 0.1 to 0.5wt%, based on the total weight of the mixture.
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| GB874488A (en) * | 1958-08-11 | 1961-08-10 | Henri Georges Bouly | Steel alloys |
| CN1477226A (en) * | 2003-08-01 | 2004-02-25 | 清华大学 | Medium-low carbon manganese system self-hardening bainite steel |
| CN101173343A (en) * | 2007-12-04 | 2008-05-07 | 北京工业大学 | High-strength abrasion-proof cast steel lining board and manufacturing method thereof |
| CN101492793A (en) * | 2009-02-21 | 2009-07-29 | 丁起 | Medium-lower alloy abrasion resistant steel |
| CN101906588A (en) * | 2010-07-09 | 2010-12-08 | 清华大学 | Preparation method for air-cooled lower bainite/martensite multi-phase wear-resistant cast steel |
| CN102534398A (en) * | 2012-01-06 | 2012-07-04 | 北京工业大学 | Ferroboron-containing alloy wear-resistant material and preparation method thereof |
| WO2018018389A1 (en) * | 2016-07-25 | 2018-02-01 | 顾湘 | High-strength microalloyed rare-earth cast steel |
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