CN104120331A - Antifatigue liner plate with high toughness and hardness for ball mill - Google Patents
Antifatigue liner plate with high toughness and hardness for ball mill Download PDFInfo
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- CN104120331A CN104120331A CN201410374366.5A CN201410374366A CN104120331A CN 104120331 A CN104120331 A CN 104120331A CN 201410374366 A CN201410374366 A CN 201410374366A CN 104120331 A CN104120331 A CN 104120331A
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Abstract
The invention discloses an antifatigue liner plate with high toughness and hardness for a ball mill. The antifatigue liner plate is prepared from the following components in percentage by weight: 2.4-2.8% of carbon, 6-8% of chromium, 0.6-1.0% of silicon, 0.4-0.9% of manganese, 0.5-1% of copper, 0.3-0.55% of molybdenum, 0.3-0.5% of titanium, 0.2-0.3% of vanadium, 0.1-0.3% of yttrium-based heavy rare earth, less than or equal to 0.04% of sulfur, less than or equal to 0.04% of phosphorus and the balance of iron and other small amounts of inevitable impurities. According to the liner plate disclosed by the invention, the content of carbon and chromium is reasonably controlled, the content of carbon determines the number of eutectic carbides, the content of chromium determines the type of eutectic carbides and carbon and chromium are main elements for determining the matrix structure of high chromium alloy cast iron and structures and performances of the carbides. By reasonably controlling the smelting process, oxides, sulfides, sulfur oxides, harmful gases and high and medium non-metal impurities in iron can be effectively removed. The liner plate disclosed by the invention is good in wear resistance, high in strength and impact toughness and excellent in antifatigue performance.
Description
Technical field
The present invention relates to abrasion-proof backing block technical field, relate in particular to a kind of ball mill high tenacity high rigidity antifatigue liner plate.
Background technology
Roller milling machine is widely used in the industries such as metal mine, cement, power system.China's diameter, at five meters of ball grinding machine lining boards more than left and right, is still continued to use high mangaenese steel manufacture at present.High mangaenese steel is as ball grinding machine lining board, its working condition can not make it give full play to the performance of work hardening, high mangaenese steel impelling strength is low simultaneously, liner plate in use surface easily produces viscous deformation, make to occur between liner plate interlock, even bulk deformation, breaks holding bolt, causes repair demolition very difficult.How to prepare a kind of hardness high, impelling strength is high, anti-fatigue performance excellence, and the lining sheet for ball mill of wear resisting property excellence becomes the current technical issues that need to address.
Summary of the invention
The present invention proposes a kind of ball mill high tenacity high rigidity antifatigue liner plate, wear resisting property of the present invention is good, and intensity and impelling strength are high, anti-fatigue performance excellence.
A kind of ball mill high tenacity high rigidity antifatigue liner plate that the present invention proposes, its compositions in weight percentage comprises: carbon 2.4-2.8%, chromium 6-8%, silicon 0.6-1.0%, manganese 0.4-0.9%, copper 0.5-1%, molybdenum 0.3-0.55%, titanium 0.3-0.5%, vanadium 0.2-0.3%, yttrium-base heavy rare earth 0.1-0.3%, sulphur≤0.04%, phosphorus≤0.04%, all the other are iron and other a small amount of inevitable impurity;
In preparation process, adopt following steps to make described ball mill high tenacity high rigidity antifatigue liner plate:
S1, first high carbon ferro-chrome is melted in medium-frequency induction furnace, continue to be warming up to 1450-1480 DEG C, add successively steel scrap, ferromanganese, ferro-niobium, molybdenum-iron, vanadium iron, rare earth alloy to forming molten mass; Then add ferrotianium, vanadium iron, treat that temperature rises to 1520-1535 DEG C, descum, then add ferro-boron, after stirring, add yttrium basic weight metal, stir, slagging-off, is poured into the material obtaining in mould with pouring device after standing 5-7min, insulation, removes the remaining sand on foundry goods, reconditioning, cooling forming, wherein, the granularity of high carbon ferro-chrome is 50-70mm, the granularity of ferromanganese is 20-35mm, and the granularity of ferro-boron, ferrotianium, vanadium iron and ferro-niobium is not all higher than 8mm;
S2, pack the product after cooling forming into pallet car type cabinet-type electric furnace and heat-treat, first rise to 400-430 DEG C by normal temperature, insulation 1-2h, be warming up to 450-480 DEG C, insulation 0.5-1h, is warming up to 500-540 DEG C, insulation 1-1.5h, is heated to 620-650 DEG C, insulation 0.5-1h, be heated to 660-680 DEG C, insulation 1-2h, is heated to 700-720 DEG C, when insulation 0.5-1, quench rapidly and carry out quench treatment into oil quenching bath, the cool time is 6-20min, and cool to room temperature obtains pre-treatment liner plate;
S3, will obtain pre-treatment liner plate and put into and in pallet car type cabinet-type electric furnace, be heated to 300-350 DEG C of insulation 1-2h, reheat 600-700 DEG C of insulation 2-3h, reheat 930-990 DEG C of insulation 2-3h, carry out afterwards air quenching to room temperature, then put into and in cabinet-type electric furnace, be heated to 420-480 DEG C of insulation 4-6h, air cooling;
S4, be tempered to 300-500 DEG C, heat-up rate is 20-30 DEG C/h, and oil quenching to room temperature obtains ball mill high tenacity high rigidity antifatigue liner plate.
Preferably, its compositions in weight percentage comprises: carbon 2.7-2.8%, chromium 6.5-7%, silicon 0.8-0.9%, manganese 0.5-0.7%, copper 0.8-0.9%, molybdenum 0.45-0.5%, titanium 0.35-0.42%, vanadium 0.25-0.28%, yttrium-base heavy rare earth 0.15-0.2%, sulphur≤0.04%, phosphorus≤0.04%, all the other are iron and other a small amount of inevitable impurity.
Preferably, in S2, packing the product after cooling forming into pallet car type cabinet-type electric furnace heat-treats, first rise to 420-425 DEG C by normal temperature, insulation 1-2h, is warming up to 470-485 DEG C, insulation 0.5-1h, be warming up to 510-520 DEG C, insulation 1-1.5h, is heated to 630-640 DEG C, insulation 0.5-1h, be heated to 670-675 DEG C, insulation 1-2h, is heated to 710-715 DEG C, when insulation 0.5-1, quench rapidly and carry out quench treatment into oil quenching bath, the cool time is 15-18min, and cool to room temperature obtains pre-treatment liner plate.
Preferably, in S3, to obtain being heated to 320-330 DEG C of insulation 1-2h in pre-treatment liner plate threading pallet car type cabinet-type electric furnace, reheat 650-680 DEG C of insulation 2-3h, reheat 950-970 DEG C of insulation 2-3h, carry out afterwards air quenching to room temperature, then put into and in cabinet-type electric furnace, be heated to 450-460 DEG C of insulation 4-6h, air cooling.
Preferably, in S4, be tempered to 400-450 DEG C, heat-up rate is 25-28 DEG C/h, and oil quenching to room temperature obtains ball mill high tenacity high rigidity antifatigue liner plate.
In the present invention, rationally control the content of carbon chromium, carbon amount determines eutectic carbides quantity, chromium amount determines eutectic carbides type, carbon and chromium are to determine high-chromium alloy cast-iron matrix, the principal element of carbide structure and performance, titanium can with iron liquid in nitrogen form dystectic titanium nitride, play outer brilliant effect, titanium is also carbide, form the titanium carbide of stabilizer pole, can stop Austenite Grain Growth, by adopting the processing of going bad of yttrium basic weight metal, refine austenite manager, the further tissue after refinement phase transformation, make carbide by thick, the bar intermeshing bunch shape, become the thin bar being evenly distributed independently of one another, refining eutectic carbide, reduce the effect of isolating to product, strengthen anti-fatigue performance, improve product strength, toughness and wear resisting property, obtain thin crystalline substance and silicon, manganese, copper, molybdenum, nickel, vanadium and yttrium-base heavy rare earth mating reaction, and control phosphorus, sulphur content is lower than certain numerical value, can greatly improve goods impelling strength, by controlling raw material high carbon ferro-chrome, ferromanganese, ferro-boron, ferrotianium, the granularity of vanadium iron and ferro-niobium is in certain scope, can strengthen the homogenizing of mixing of materials, and can effectively prevent that gas from bringing base fluid into, by reasonable control melting technology, can effectively remove the oxide compound of iron in also, sulfide, oxysulfide, obnoxious flavour and senior middle school's nonmetallic impurity, wear resisting property of the present invention is good, intensity and impelling strength are high, anti-fatigue performance excellence.
Embodiment
Embodiment 1
A kind of ball mill high tenacity high rigidity antifatigue liner plate that the present invention proposes, its compositions in weight percentage comprises: carbon 2.65%, chromium 7.2%, silicon 0.85%, manganese 0.7%, copper 0.9%, molybdenum 0.52%, titanium 0.45%, vanadium 0.2%, yttrium-base heavy rare earth 0.2%, sulphur≤0.04%, phosphorus≤0.04%, all the other are iron and other a small amount of inevitable impurity;
In preparation process, adopt following steps to make described ball mill high tenacity high rigidity antifatigue liner plate:
S1, first high carbon ferro-chrome is melted in medium-frequency induction furnace, continue to be warming up to 1470 DEG C, add successively steel scrap, ferromanganese, ferro-niobium, molybdenum-iron, vanadium iron, rare earth alloy to forming molten mass; Then add ferrotianium, vanadium iron, treat that temperature rises to 1530 DEG C, descum, then add ferro-boron, after stirring, add yttrium basic weight metal, stir, slagging-off, is poured into the material obtaining in mould with pouring device after standing 6min, insulation, removes the remaining sand on foundry goods, reconditioning, cooling forming, wherein, the granularity of high carbon ferro-chrome is 65-68mm, the granularity of ferromanganese is 25-30mm, and the granularity of ferro-boron, ferrotianium, vanadium iron and ferro-niobium is not all higher than 8mm;
S2, pack the product after cooling forming into pallet car type cabinet-type electric furnace and heat-treat, first rise to 421 DEG C by normal temperature, insulation 1.5h, be warming up to 480 DEG C, insulation 1h, is warming up to 515 DEG C, insulation 1.2h, is heated to 634 DEG C, insulation 1h, be heated to 672 DEG C, insulation 1.5h, is heated to 713 DEG C, be incubated at 0.5 o'clock, quench rapidly and carry out quench treatment into oil quenching bath, the cool time is 17min, and cool to room temperature obtains pre-treatment liner plate;
S3, will obtain pre-treatment liner plate and put into and in pallet car type cabinet-type electric furnace, be heated to 325 DEG C of insulation 1.5h, reheat 670 DEG C of insulation 2.5h, reheat 965 DEG C of insulation 2.5h, carry out afterwards air quenching to room temperature, then put into and in cabinet-type electric furnace, be heated to 455 DEG C of insulation 5h, air cooling;
S4, be tempered to 425 DEG C, heat-up rate is 27 DEG C/h, and oil quenching to room temperature obtains ball mill high tenacity high rigidity antifatigue liner plate.
Embodiment 2
A kind of ball mill high tenacity high rigidity antifatigue liner plate that the present invention proposes, its compositions in weight percentage comprises: carbon 2.4%, chromium 8%, silicon 0.6%, manganese 0.9%, copper 0.5%, molybdenum 0.55%, titanium 0.3%, vanadium 0.3%, yttrium-base heavy rare earth 0.1%, sulphur≤0.04%, phosphorus≤0.04%, all the other are iron and other a small amount of inevitable impurity;
In preparation process, adopt following steps to make described ball mill high tenacity high rigidity antifatigue liner plate:
S1, first high carbon ferro-chrome is melted in medium-frequency induction furnace, continue to be warming up to 1480 DEG C, add successively steel scrap, ferromanganese, ferro-niobium, molybdenum-iron, vanadium iron, rare earth alloy to forming molten mass; Then add ferrotianium, vanadium iron, treat that temperature rises to 1520 DEG C, descum, then add ferro-boron, after stirring, add yttrium basic weight metal, stir, slagging-off, is poured into the material obtaining in mould with pouring device after standing 7min, insulation, removes the remaining sand on foundry goods, reconditioning, cooling forming, wherein, the granularity of high carbon ferro-chrome is 50-70mm, the granularity of ferromanganese is 20-35mm, and the granularity of ferro-boron, ferrotianium, vanadium iron and ferro-niobium is not all higher than 8mm;
S2, pack the product after cooling forming into pallet car type cabinet-type electric furnace and heat-treat, first rise to 400 DEG C by normal temperature, insulation 2h, be warming up to 450 DEG C, insulation 1h, is warming up to 500 DEG C, insulation 1.5h, is heated to 620 DEG C, insulation 1h, be heated to 660 DEG C, insulation 2h, is heated to 700 DEG C, be incubated at 1 o'clock, quench rapidly and carry out quench treatment into oil quenching bath, the cool time is 6min, and cool to room temperature obtains pre-treatment liner plate;
S3, will obtain pre-treatment liner plate and put in pallet car type cabinet-type electric furnace and be heated to 350 DEG C of insulation 1h, reheat 700 DEG C of insulation 2h, reheat 990 DEG C of insulation 2h, carry out afterwards air quenching to room temperature, and then put into and in cabinet-type electric furnace, be heated to 480 DEG C of insulation 4h, air cooling;
S4, be tempered to 500 DEG C, heat-up rate is 20 DEG C/h, and oil quenching to room temperature obtains ball mill high tenacity high rigidity antifatigue liner plate.
Embodiment 3
A kind of ball mill high tenacity high rigidity antifatigue liner plate that the present invention proposes, its compositions in weight percentage comprises: carbon 2.8%, chromium 6%, silicon 1.0%, manganese 0.4%, copper 1%, molybdenum 0.3%, titanium 0.5%, vanadium 0.2%, yttrium-base heavy rare earth 0.3%, sulphur≤0.04%, phosphorus≤0.04%, all the other are iron and other a small amount of inevitable impurity;
In preparation process, adopt following steps to make described ball mill high tenacity high rigidity antifatigue liner plate:
S1, first high carbon ferro-chrome is melted in medium-frequency induction furnace, continue to be warming up to 1450 DEG C, add successively steel scrap, ferromanganese, ferro-niobium, molybdenum-iron, vanadium iron, rare earth alloy to forming molten mass; Then add ferrotianium, vanadium iron, treat that temperature rises to 1535 DEG C, descum, then add ferro-boron, after stirring, add yttrium basic weight metal, stir, slagging-off, is poured into the material obtaining in mould with pouring device after standing 5min, insulation, removes the remaining sand on foundry goods, reconditioning, cooling forming, wherein, the granularity of high carbon ferro-chrome is 50-70mm, the granularity of ferromanganese is 20-35mm, and the granularity of ferro-boron, ferrotianium, vanadium iron and ferro-niobium is not all higher than 8mm;
S2, pack the product after cooling forming into pallet car type cabinet-type electric furnace and heat-treat, first rise to 430 DEG C by normal temperature, insulation 1h, be warming up to 480 DEG C, insulation 0.5h, is warming up to 540 DEG C, insulation 1h, is heated to 650 DEG C, insulation 0.5h, be heated to 680 DEG C, insulation 1h, is heated to 720 DEG C, be incubated at 0.5 o'clock, quench rapidly and carry out quench treatment into oil quenching bath, the cool time is 20min, and cool to room temperature obtains pre-treatment liner plate;
S3, will obtain pre-treatment liner plate and put in pallet car type cabinet-type electric furnace and be heated to 300 DEG C of insulation 2h, reheat 600 DEG C of insulation 3h, reheat 930 DEG C of insulation 3h, carry out afterwards air quenching to room temperature, and then put into and in cabinet-type electric furnace, be heated to 420 DEG C of insulation 6h, air cooling;
S4, be tempered to 300 DEG C, heat-up rate is 30 DEG C/h, and oil quenching to room temperature obtains ball mill high tenacity high rigidity antifatigue liner plate.
In embodiment 1-3, rationally control the content of carbon chromium, carbon amount determines eutectic carbides quantity, chromium amount determines eutectic carbides type, carbon and chromium are to determine high-chromium alloy cast-iron matrix, the principal element of carbide structure and performance, titanium can with iron liquid in nitrogen form dystectic titanium nitride, play outer brilliant effect, titanium is also carbide, form the titanium carbide of stabilizer pole, can stop Austenite Grain Growth, by adopting the processing of going bad of yttrium basic weight metal, refine austenite manager, the further tissue after refinement phase transformation, make carbide by thick, the bar intermeshing bunch shape, become the thin bar being evenly distributed independently of one another, refining eutectic carbide, reduce the effect of isolating to product, strengthen anti-fatigue performance, improve product strength, toughness and wear resisting property, obtain thin brilliant and silicon, manganese, copper, molybdenum, nickel, vanadium and yttrium-base heavy rare earth mating reaction, and control phosphorus, sulphur content lower than certain numerical value, can greatly improve goods impelling strength, granularity by controlling raw material high carbon ferro-chrome, ferromanganese, ferro-boron, ferrotianium, vanadium iron and ferro-niobium is in certain scope, can strengthen the homogenizing of mixing of materials, and can effectively prevent that gas from bringing base fluid into, by reasonable control melting technology, can effectively remove oxide compound, sulfide, oxysulfide, obnoxious flavour and the senior middle school nonmetallic impurity of iron in also.
Wear resisting property of the present invention is good, and intensity and impelling strength are high, anti-fatigue performance excellence.
The above; it is only preferably embodiment of the present invention; but protection scope of the present invention is not limited to this; any be familiar with those skilled in the art the present invention disclose technical scope in; be equal to replacement or changed according to technical scheme of the present invention and inventive concept thereof, within all should being encompassed in protection scope of the present invention.
Claims (5)
1. a high tenacity high rigidity antifatigue liner plate for ball mill, is characterized in that, its compositions in weight percentage comprises: carbon 2.4-2.8%, chromium 6-8%, silicon 0.6-1.0%, manganese 0.4-0.9%, copper 0.5-1%, molybdenum 0.3-0.55%, titanium 0.3-0.5%, vanadium 0.2-0.3%, yttrium-base heavy rare earth 0.1-0.3%, sulphur≤0.04%, phosphorus≤0.04%, all the other are iron and other a small amount of inevitable impurity;
In preparation process, adopt following steps to make described ball mill high tenacity high rigidity antifatigue liner plate:
S1, first high carbon ferro-chrome is melted in medium-frequency induction furnace, continue to be warming up to 1450-1480 DEG C, add successively steel scrap, ferromanganese, ferro-niobium, molybdenum-iron, vanadium iron, rare earth alloy to forming molten mass; Then add ferrotianium, vanadium iron, treat that temperature rises to 1520-1535 DEG C, descum, then add ferro-boron, after stirring, add yttrium basic weight metal, stir, slagging-off, is poured into the material obtaining in mould with pouring device after standing 5-7min, insulation, removes the remaining sand on foundry goods, reconditioning, cooling forming, wherein, the granularity of high carbon ferro-chrome is 50-70mm, the granularity of ferromanganese is 20-35mm, and the granularity of ferro-boron, ferrotianium, vanadium iron and ferro-niobium is not all higher than 8mm;
S2, pack the product after cooling forming into pallet car type cabinet-type electric furnace and heat-treat, first rise to 400-430 DEG C by normal temperature, insulation 1-2h, be warming up to 450-480 DEG C, insulation 0.5-1h, is warming up to 500-540 DEG C, insulation 1-1.5h, is heated to 620-650 DEG C, insulation 0.5-1h, be heated to 660-680 DEG C, insulation 1-2h, is heated to 700-720 DEG C, when insulation 0.5-1, quench rapidly and carry out quench treatment into oil quenching bath, the cool time is 6-20min, and cool to room temperature obtains pre-treatment liner plate;
S3, will obtain pre-treatment liner plate and put into and in pallet car type cabinet-type electric furnace, be heated to 300-350 DEG C of insulation 1-2h, reheat 600-700 DEG C of insulation 2-3h, reheat 930-990 DEG C of insulation 2-3h, carry out afterwards air quenching to room temperature, then put into and in cabinet-type electric furnace, be heated to 420-480 DEG C of insulation 4-6h, air cooling;
S4, be tempered to 300-500 DEG C, heat-up rate is 20-30 DEG C/h, and oil quenching to room temperature obtains ball mill high tenacity high rigidity antifatigue liner plate.
2. high tenacity high rigidity antifatigue liner plate for ball mill according to claim 1, is characterized in that, its compositions in weight percentage comprises: carbon 2.7-2.8%, chromium 6.5-7%, silicon 0.8-0.9%, manganese 0.5-0.7%, copper 0.8-0.9%, molybdenum 0.45-0.5%, titanium 0.35-0.42%, vanadium 0.25-0.28%, yttrium-base heavy rare earth 0.15-0.2%, sulphur≤0.04%, phosphorus≤0.04%, all the other are iron and other a small amount of inevitable impurity.
3. high tenacity high rigidity antifatigue liner plate for ball mill according to claim 1 and 2, it is characterized in that, in S2, packing the product after cooling forming into pallet car type cabinet-type electric furnace heat-treats, first rise to 420-425 DEG C by normal temperature, insulation 1-2h, be warming up to 470-485 DEG C, insulation 0.5-1h, be warming up to 510-520 DEG C, insulation 1-1.5h, be heated to 630-640 DEG C, insulation 0.5-1h, be heated to 670-675 DEG C, insulation 1-2h, be heated to 710-715 DEG C, when insulation 0.5-1, quench rapidly and carry out quench treatment into oil quenching bath, cool time is 15-18min, cool to room temperature obtains pre-treatment liner plate.
4. according to high tenacity high rigidity antifatigue liner plate for the ball mill described in claim 1-3 any one, it is characterized in that, in S3, to obtain being heated to 320-330 DEG C of insulation 1-2h in pre-treatment liner plate threading pallet car type cabinet-type electric furnace, reheat 650-680 DEG C of insulation 2-3h, reheat 950-970 DEG C of insulation 2-3h, carry out afterwards air quenching to room temperature, then put into and in cabinet-type electric furnace, be heated to 450-460 DEG C of insulation 4-6h, air cooling.
5. according to high tenacity high rigidity antifatigue liner plate for the ball mill described in claim 1-4 any one, it is characterized in that, in S4, be tempered to 400-450 DEG C, heat-up rate is 25-28 DEG C/h, and oil quenching to room temperature obtains ball mill high tenacity high rigidity antifatigue liner plate.
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| CN201410374366.5A CN104120331A (en) | 2014-07-31 | 2014-07-31 | Antifatigue liner plate with high toughness and hardness for ball mill |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105970079A (en) * | 2016-07-01 | 2016-09-28 | 宁国市中辉新材料技术有限公司 | High-toughness wear-resistant multi-element alloy energy-saving wear-resisting ball and manufacturing method thereof |
| CN111748723A (en) * | 2020-06-16 | 2020-10-09 | 新泰市鼎鑫工贸有限公司 | Formula of yttrium series heavy rare earth high-toughness wear-resistant high-chromium cast iron |
| CN111750193A (en) * | 2020-06-16 | 2020-10-09 | 新泰市鼎鑫工贸有限公司 | Yttrium series heavy rare earth high-toughness wear-resistant high-chromium cast iron elbow tee joint and preparation method thereof |
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| JP2001003134A (en) * | 1999-06-21 | 2001-01-09 | Honda Motor Co Ltd | Hypo-eutectic spheroidal graphite cast iron |
| CN103060671A (en) * | 2013-01-28 | 2013-04-24 | 江苏一汽铸造股份有限公司 | Ferritic nodular cast iron and preparation thereof |
| CN103088249A (en) * | 2013-01-23 | 2013-05-08 | 驻马店市永诚耐磨材料有限公司 | Abrasion-resistant alloy cast iron material with high hardness for chute lining plate, and preparation method thereof |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001003134A (en) * | 1999-06-21 | 2001-01-09 | Honda Motor Co Ltd | Hypo-eutectic spheroidal graphite cast iron |
| CN103088249A (en) * | 2013-01-23 | 2013-05-08 | 驻马店市永诚耐磨材料有限公司 | Abrasion-resistant alloy cast iron material with high hardness for chute lining plate, and preparation method thereof |
| CN103060671A (en) * | 2013-01-28 | 2013-04-24 | 江苏一汽铸造股份有限公司 | Ferritic nodular cast iron and preparation thereof |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105970079A (en) * | 2016-07-01 | 2016-09-28 | 宁国市中辉新材料技术有限公司 | High-toughness wear-resistant multi-element alloy energy-saving wear-resisting ball and manufacturing method thereof |
| CN111748723A (en) * | 2020-06-16 | 2020-10-09 | 新泰市鼎鑫工贸有限公司 | Formula of yttrium series heavy rare earth high-toughness wear-resistant high-chromium cast iron |
| CN111750193A (en) * | 2020-06-16 | 2020-10-09 | 新泰市鼎鑫工贸有限公司 | Yttrium series heavy rare earth high-toughness wear-resistant high-chromium cast iron elbow tee joint and preparation method thereof |
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