CN103993218B - Large-sized grinder rich chromium cast iron trench liner and preparation method thereof - Google Patents
Large-sized grinder rich chromium cast iron trench liner and preparation method thereof Download PDFInfo
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Abstract
The present invention relates to technical field of metal, it discloses large-sized grinder rich chromium cast iron trench liner and preparation method thereof, comprise the chemical composition of following weight percent: carbon 2.2-2.8%, silicon 0.3-0.8%, manganese 0.6-1.2%, chromium 15-20%, magnesium 2.0-3.0%, molybdenum 0.3-1.0%, nickel 0.1-0.2%, copper 0.3-0.8%, vanadium 0.08-0.25%, sulphur 0.005-0.025%, phosphorus 0.005-0.025%, yttrium 0.005-0.03%, surplus is iron.Work-ing life of the present invention is very long, and while raising wear resistance, impact toughness also improves greatly, meet the shock resistance of large-sized grinder liner plate, decrease the frequency that factory changes liner plate, reduce labour intensity, raw material of the present invention is easy to get, and making method is simple, has effectively saved the energy.
Description
Technical field
The present invention relates to technical field of metal, refer more particularly to large-sized grinder rich chromium cast iron trench liner and preparation method thereof.
Background technology
Lining board of grinder except bear grinding element and material impact and except wearing and tearing, also have the effect promoting grinding element.Along with the fast development of material grinding technology, grinding machine becomes to giving maximization, it is also proposed higher requirement to the performance of lining material, improves the emphasis that its wear resistance is research.Lining material, through the development of more than 30 years, experienced by high violent steel, common spoken parts in traditional operas cast steel, ni-hard cast iron, high chromium white iron to the developmental stage of the middle-low alloy steel of modified high manganese steel and various Q-tempering technique.Current domestic large-sized grinder, its liner plate selection majority adopts high mangaenese steel, also has and adopts rich chromium cast iron, low alloy steel compound cast material.But from operative practice, the former is only 0.5-1 year by practical life on large mill, and in use liner plate easily viscous deformation occurs and affects mill running; And the latter is because adopting bimetal composite casting, its castability is wayward, and result of use is also undesirable.For extending liner plate work-ing life, improving large-sized grinder operation factor, improving Business Economic Benefit further, research not only wear-resisting but also reliably lining material probe into development work necessary.
Chinese patent CN103627981A discloses a kind of Wear-resistant high-manganese steel liner plate material and preparation method thereof, it is characterized in that: the chemical element composition that it contains and mass percent thereof are: carbon 1.2-1.4%, silicon 1.3-1.5%, manganese 9.2-10.4%, titanium 1.1-1.3%, chromium 0.9-1.3%, molybdenum 0.02-0.04%, aluminium 0.1-0.2%, lanthanum 0.02-0.04%, Nd0.04-0.07%, S≤0.04%, P≤0.04%, surplus are iron.The steel alloy of this invention adds the elements such as lanthanum, Nd, titanium on the basis of high carbon and high manganese steel, the steel alloy obtained not only has high hardness, excellent wear resistance, but also there is good toughness, advantage that plasticity is good, and more excellent than common high mangaenese steel performance, be suitable as the lining material that wearing and tearing are large.But this invention does not carry out Metamorphism treatment, the toughness of products obtained therefrom is inadequate, can not meet the shock resistance of Large Crusher to tup.
Summary of the invention
It is not only wear-resisting but also reliable that technical problem to be solved by this invention is to provide one, large-sized grinder high chrome cast iron lining plate of long service life and preparation method thereof.
For solving the problems of the technologies described above, the present invention by the following technical solutions:
A kind of large-sized grinder high chrome cast iron lining plate, is characterized in that, comprise the chemical composition of following weight percent: carbon 2.2-2.8%, silicon 0.3-0.8%, manganese 0.6-1.2%, chromium 15-20%, magnesium 2.0-3.0%, molybdenum 0.3-1.0%, nickel 0.1-0.2%, copper 0.3-0.8%, vanadium 0.08-0.25%, sulphur 0.005-0.025%, phosphorus 0.005-0.025%, yttrium 0.005-0.03%, surplus is iron.
Preferably, described large-sized grinder high chrome cast iron lining plate comprises the chemical composition of following weight percent: carbon 2.2-2.5%, silicon 0.3-0.5%, manganese 0.8-1.2%, chromium 15-20%, magnesium 2.0-2.8%, molybdenum 0.5-1.0%, nickel 0.15-0.2%, copper 0.45-0.8%, vanadium 0.08-0.20%, sulphur 0.005-0.025%, phosphorus 0.005-0.025%, yttrium 0.005-0.03%, surplus is iron.
A preparation method for large-sized grinder high chrome cast iron lining plate, is characterized in that, comprises the following steps:
(1) refining is molten: add in furnace by the ordinary scrap steel of clean drying, the pig iron, stainless steel waste material, magnesium ore in sand form, ferromanganese, molybdenum-iron, nickel plate, carburetting spent cathodes, heat fused, after adjusting component is qualified, temperature is risen to 1600-1650 DEG C, the ferrosilicon adding preheating carries out bulk deoxidation, tap a blast furnace and within first 2 minutes, adopt dark method of inserting aluminium wire to carry out diffusive deoxidation, then tap a blast furnace;
(2) pour into a mould: efficient composite modifying agent, rare earth are placed in ladle bottom, Metamorphism treatment is carried out to molten steel, then molten steel is poured in ingot mold, pouring molten steel temperature is at 1440-1460 DEG C, cast first slow, in fast, carefully rear, when molten steel arrives rising head 3/5, add heat preserving agent, ingot steel casting is after 5-10 minutes, then teeming 2-3 times;
(3) casting mold: when cast(ing) surface temperature is no more than 600 DEG C, the steel ingot demoulding, adopts external chill and adds the foundry processing of insulated feeder by destructive test and the method for observing macrofracture, revising external chill;
(4) Quench and temper process: when the austenitizing temperature of liner plate is at 980-1000 DEG C, soaking time 2 hours, quenches into pond, when backing surface temperature is lower than 300 DEG C, enter stove tempering, temperature is at 280-300 DEG C, be incubated 5 hours, then naturally cooling.
Preferably, described step (2) middle-weight rare earths is yttrium element.
Preferably, in described step (2), efficient composite modifying agent is the wherein one of potassium or sodium.
Preferably, in described step (2), efficient alterant, rare earth are the fritter being less than 45mm through being crushed to granularity respectively, dry the material of gained at 280 DEG C.
Preferably, pour method in described step (2) mesometamorphism process employing bag and Metamorphism treatment is carried out to molten steel.
Preferably, in described step (2), cast adopts bottom pouring cast steel ingot.
The Main Function of carbon and chromium ensures carbon in cast iron compound quantity and form.Along with the raising of carbon content, carbide increases; Along with the increase of Cr/C ratio, the pattern of eutectic carbides experienced by the process reduced by continuous net-shaped → sheet → shaft-like continuity degree, and eutectic carbides crystal type experience is by the change procedure of M3C → M3C+M7C3 → M7C3.Have data to point out: when eutectic carbides is constant, and when Cr/C is 6.6-7.1, the failure crack extended capability with chrome cast iron is the strongest.According to these principles, C amount should be decided to be 3.1-3.6%, Cr amount is 20-25%.Cr in matrix can also improve the hardening capacity of material.The effect of nickel is the hardening capacity increasing rich chromium cast iron, suppresses austenitic matrix to pearlitic transformation, promotes the formation of martensite base.
The shape of steel inclusion, particularly sulfide, size, distribution and quantity seriously affect the performance of steel, especially plasticity and toughness.Without the medium high carbon alloy steel of rare earth Dy ions, inclusion mostly is long strip shape and with corner angle, and the amount of inclusions is more, and fracture mode is quasi-cleavage crack.Rare earth adds in steel the effect with desulfurization, degasification, the thermodynamic condition generated according to re inclusion and application practice, the avidity of rare earth element and oxygen and sulphur is significantly greater than manganese and aluminium etc., rare earth element easily and oxygen, sulphur generation conjugation reaction, generate the re inclusions such as globular RE2O2S, RE2S3, significantly improve the brittle rupture that medium high carbon Low Alloying Multicomponent Steels produces along crystal boundary.Therefore, after rare earth Dy ions, the amount of inclusions obviously reduces, and inclusion is tending towards nodularization and is evenly distributed in steel, and the toughness of steel is improved, and impact fracture will occur a large amount of dimples.But excessive rare earth adds membership causes re inclusion to be broken chainlike distribution, damages plasticity and the toughness of steel on the contrary.
Rare earth has larger atomic radius, and in iron, solubleness is very little.Owing to having very large electronegativity, therefore their chemical property is very active, can form a series of very stable compound, become non-spontaneous crystallization core, thus play the effect of crystal grain thinning in steel.In addition, rare earth is surface active element, can increase crystallization nuclei and produce speed, stop grain growing.The refinement of crystal grain, is conducive to the raising of steel plasticity and toughness.Along with the increase of content of rare earth, grain refining is more obvious, and it is relevant that this and rare earth element can increase the intensity of activation that austenite grain boundary moves.
Work-ing life of the present invention is very long, and while raising wear resistance, impact toughness also improves greatly, meet the shock resistance of large-sized grinder liner plate, decrease the frequency that factory changes liner plate, reduce labour intensity, raw material of the present invention is easy to get, making method is simple, uses ordinary scrap steel, the pig iron, stainless steel waste material as raw materials for production, recycle, effectively save the energy, Metamorphism treatment is carried out to molten steel, adds toughness and the intensity of liner plate, improve work-ing life.
Embodiment
Below in conjunction with embodiment, technical scheme of the present invention is further described in detail.
Embodiment one:
(1) refining is molten: add in furnace by the ordinary scrap steel of clean drying, the pig iron, stainless steel waste material, magnesium ore in sand form, ferromanganese, molybdenum-iron, nickel plate, carburetting spent cathodes, heat fused, after adjusting component is qualified, temperature is risen to 1650 DEG C, the ferrosilicon adding preheating carries out bulk deoxidation, tap a blast furnace and within first 2 minutes, adopt dark method of inserting aluminium wire to carry out diffusive deoxidation, then tap a blast furnace;
(2) pour into a mould: efficient composite modifying agent potassium, yttrium element are crushed to the fritter that granularity is less than 45mm, after drying at 280 DEG C, being placed in ladle bottom, with pouring method in bag, Metamorphism treatment being carried out to molten steel, then molten steel is poured in ingot mold, pouring molten steel temperature at 1460 DEG C, cast first slow, in fast, carefully rear, adopt bottom pouring cast steel ingot, when molten steel arrives rising head 3/5, add heat preserving agent, ingot steel casting is after 10 minutes, then teeming 3 times;
(3) casting mold: when cast(ing) surface temperature is no more than 600 DEG C, the steel ingot demoulding, adopts external chill and adds the foundry processing of insulated feeder by destructive test and the method for observing macrofracture, revising external chill;
(4) Quench and temper process: when the austenitizing temperature of liner plate is at 1000 DEG C, soaking time 2 hours, quenches into pond, when backing surface temperature is lower than 300 DEG C, enter stove tempering, temperature is at 300 DEG C, be incubated 5 hours, then naturally cooling, each chemical component weight per-cent of final gained liner plate is carbon 2.5%, silicon 0.5%, manganese 1.2%, chromium 20%, magnesium 2.8%, molybdenum 1.0%, nickel 0.2%, copper 0.8%, vanadium 0.20%, sulphur 0.025%, phosphorus 0.025%, yttrium 0.03%, potassium 2%, surplus is iron.
Embodiment two:
(1) refining is molten: add in furnace by the ordinary scrap steel of clean drying, the pig iron, stainless steel waste material, magnesium ore in sand form, ferromanganese, molybdenum-iron, nickel plate, carburetting spent cathodes, heat fused, after adjusting component is qualified, temperature is risen to 1600 DEG C, the ferrosilicon adding preheating carries out bulk deoxidation, tap a blast furnace and within first 2 minutes, adopt dark method of inserting aluminium wire to carry out diffusive deoxidation, then tap a blast furnace;
(2) pour into a mould: efficient composite modifying agent sodium, yttrium element are crushed to the fritter that granularity is less than 45mm, after drying at 280 DEG C, being placed in ladle bottom, with pouring method in bag, Metamorphism treatment being carried out to molten steel, then molten steel is poured in ingot mold, pouring molten steel temperature at 1440 DEG C, cast first slow, in fast, carefully rear, adopt bottom pouring cast steel ingot, when molten steel arrives rising head 3/5, add heat preserving agent, ingot steel casting is after 5 minutes, then teeming 2 times;
(3) casting mold: when cast(ing) surface temperature is no more than 600 DEG C, the steel ingot demoulding, adopts external chill and adds the foundry processing of insulated feeder by destructive test and the method for observing macrofracture, revising external chill;
(4) Quench and temper process: when the austenitizing temperature of liner plate is at 980 DEG C, soaking time 2 hours, quenches into pond, when backing surface temperature is lower than 300 DEG C, enter stove tempering, temperature is at 280 DEG C, be incubated 5 hours, then naturally cooling, each chemical component weight per-cent of final gained liner plate is carbon 2.2%, silicon 0.3%, manganese 0.8%, chromium 15%, magnesium 2.0%, molybdenum 0.5%, nickel 0.15%, copper 0.45%, vanadium 0.08%, sulphur 0.005%, phosphorus 0.015%, yttrium 0.025%, sodium 1.5%, surplus is iron.
Embodiment three:
(1) refining is molten: add in furnace by the ordinary scrap steel of clean drying, the pig iron, stainless steel waste material, magnesium ore in sand form, ferromanganese, molybdenum-iron, nickel plate, carburetting spent cathodes, heat fused, after adjusting component is qualified, temperature is risen to 1630 DEG C, the ferrosilicon adding preheating carries out bulk deoxidation, tap a blast furnace and within first 2 minutes, adopt dark method of inserting aluminium wire to carry out diffusive deoxidation, then tap a blast furnace;
(2) pour into a mould: efficient composite modifying agent potassium, yttrium element are crushed to the fritter that granularity is less than 45mm, after drying at 280 DEG C, being placed in ladle bottom, with pouring method in bag, Metamorphism treatment being carried out to molten steel, then molten steel is poured in ingot mold, pouring molten steel temperature at 1450 DEG C, cast first slow, in fast, carefully rear, adopt bottom pouring cast steel ingot, when molten steel arrives rising head 3/5, add heat preserving agent, ingot steel casting is after 7 minutes, then teeming 2 times;
(3) casting mold: when cast(ing) surface temperature is no more than 600 DEG C, the steel ingot demoulding, adopts external chill and adds the foundry processing of insulated feeder by destructive test and the method for observing macrofracture, revising external chill;
(4) Quench and temper process: when the austenitizing temperature of liner plate is at 990 DEG C, soaking time 2 hours, quenches into pond, when backing surface temperature is lower than 300 DEG C, enter stove tempering, temperature is at 290 DEG C, be incubated 5 hours, then naturally cooling, each chemical component weight per-cent of final gained liner plate is carbon 2.4%, silicon 0.4%, manganese 1.0%, chromium 17%, magnesium 2.5%, molybdenum 0.7%, nickel 0.17%, copper 0.65%, vanadium 0.10%, sulphur 0.02%, phosphorus 0.02%, yttrium 0.02%, potassium 1.8%, surplus is iron.
Embodiment four:
(1) refining is molten: add in furnace by the ordinary scrap steel of clean drying, the pig iron, stainless steel waste material, magnesium ore in sand form, ferromanganese, molybdenum-iron, nickel plate, carburetting spent cathodes, heat fused, after adjusting component is qualified, temperature is risen to 1620 DEG C, the ferrosilicon adding preheating carries out bulk deoxidation, tap a blast furnace and within first 2 minutes, adopt dark method of inserting aluminium wire to carry out diffusive deoxidation, then tap a blast furnace;
(2) pour into a mould: efficient composite modifying agent sodium, yttrium element are crushed to the fritter that granularity is less than 45mm, after drying at 280 DEG C, being placed in ladle bottom, with pouring method in bag, Metamorphism treatment being carried out to molten steel, then molten steel is poured in ingot mold, pouring molten steel temperature at 1445 DEG C, cast first slow, in fast, carefully rear, adopt bottom pouring cast steel ingot, when molten steel arrives rising head 3/5, add heat preserving agent, ingot steel casting is after 6 minutes, then teeming 3 times;
(3) casting mold: when cast(ing) surface temperature is no more than 600 DEG C, the steel ingot demoulding, adopts external chill and adds the foundry processing of insulated feeder by destructive test and the method for observing macrofracture, revising external chill;
(4) Quench and temper process: when the austenitizing temperature of liner plate is at 985 DEG C, soaking time 2 hours, quenches into pond, when backing surface temperature is lower than 300 DEG C, enter stove tempering, temperature is at 285 DEG C, be incubated 5 hours, then naturally cooling, each chemical component weight per-cent of final gained liner plate is carbon 2.3%, silicon 0.3%, manganese 0.9%, chromium 16%, magnesium 2.3%, molybdenum 0.6%, nickel 0.16%, copper 0.5%, vanadium 0.15%, sulphur 0.01%, phosphorus 0.01%, yttrium 0.005%, sodium 1.6%, surplus is iron.
Embodiment five:
(1) refining is molten: add in furnace by the ordinary scrap steel of clean drying, the pig iron, stainless steel waste material, magnesium ore in sand form, ferromanganese, molybdenum-iron, nickel plate, carburetting spent cathodes, heat fused, after adjusting component is qualified, temperature is risen to 1645 DEG C, the ferrosilicon adding preheating carries out bulk deoxidation, tap a blast furnace and within first 2 minutes, adopt dark method of inserting aluminium wire to carry out diffusive deoxidation, then tap a blast furnace;
(2) pour into a mould: efficient composite modifying agent potassium, yttrium element are crushed to the fritter that granularity is less than 45mm, after drying at 280 DEG C, being placed in ladle bottom, with pouring method in bag, Metamorphism treatment being carried out to molten steel, then molten steel is poured in ingot mold, pouring molten steel temperature at 1455 DEG C, cast first slow, in fast, carefully rear, adopt bottom pouring cast steel ingot, when molten steel arrives rising head 3/5, add heat preserving agent, ingot steel casting is after 9 minutes, then teeming 2 times;
(3) casting mold: when cast(ing) surface temperature is no more than 600 DEG C, the steel ingot demoulding, adopts external chill and adds the foundry processing of insulated feeder by destructive test and the method for observing macrofracture, revising external chill;
(4) Quench and temper process: when the austenitizing temperature of liner plate is at 995 DEG C, soaking time 2 hours, quenches into pond, when backing surface temperature is lower than 300 DEG C, enter stove tempering, temperature is at 295 DEG C, be incubated 5 hours, then naturally cooling, each chemical component weight per-cent of final gained liner plate is carbon 2.4%, silicon 0.45%, manganese 1.1%, chromium 18%, magnesium 2.7%, molybdenum 0.7%, nickel 0.18%, copper 0.7%, vanadium 0.18%, sulphur 0.015%, phosphorus 0.015%, yttrium 0.025%, potassium 1.9%, surplus is iron.
For further illustrating performance of the present invention, the present invention and existing lining board of grinder are made contrast, as following table:
Work-ing life of the present invention is very long, and while raising wear resistance, impact toughness also improves greatly, meet the shock resistance of large-sized grinder liner plate, decrease the frequency that factory changes liner plate, reduce labour intensity, raw material of the present invention is easy to get, making method is simple, uses ordinary scrap steel, the pig iron, stainless steel waste material as raw materials for production, recycle, effectively save the energy, Metamorphism treatment is carried out to molten steel, adds toughness and the intensity of liner plate, improve work-ing life.
It should be noted last that, above embodiment is only in order to illustrate technical scheme of the present invention and unrestricted, although with reference to preferred embodiment to invention has been detailed description, those of ordinary skill in the art is to be understood that, can modify to technical scheme of the present invention or equivalent replacement, and not departing from the spirit and scope of technical solution of the present invention, it all should be encompassed in the middle of right of the present invention.
Claims (8)
1. a large-sized grinder high chrome cast iron lining plate, is characterized in that, comprises the chemical composition of following weight percent: carbon 2.2-2.8%, silicon 0.3-0.8%, manganese 0.6-1.2%, chromium 15-20%, magnesium 2.0-3.0%, molybdenum 0.3-1.0%, nickel 0.1-0.2%, copper 0.3-0.8%, vanadium 0.08-0.25%, sulphur 0.005-0.025%, phosphorus 0.005-0.025%, yttrium 0.005-0.03%, surplus is iron.
2. large-sized grinder high chrome cast iron lining plate according to claim 1, is characterized in that, comprises the chemical composition of following weight percent: carbon 2.2-2.5%, silicon 0.3-0.5%, manganese 0.8-1.2%, chromium 15-20%, magnesium 2.0-2.8%, molybdenum 0.5-1.0%, nickel 0.15-0.2%, copper 0.45-0.8%, vanadium 0.08-0.20%, sulphur 0.005-0.025%, phosphorus 0.005-0.025%, yttrium 0.005-0.03%, surplus is iron.
3. a preparation method for the large-sized grinder high chrome cast iron lining plate that one of claim 1 to 2 is described, is characterized in that, comprise the following steps:
(1) refining is molten: add in furnace by the ordinary scrap steel of clean drying, the pig iron, stainless steel waste material, magnesium ore in sand form, ferromanganese, molybdenum-iron, nickel plate, carburetting spent cathodes, heat fused, after adjusting component is qualified, temperature is risen to 1600-1650 DEG C, the ferrosilicon adding preheating carries out bulk deoxidation, tap a blast furnace and within first 2 minutes, adopt dark method of inserting aluminium wire to carry out diffusive deoxidation, then tap a blast furnace;
(2) pour into a mould: efficient composite modifying agent, rare earth are placed in ladle bottom, Metamorphism treatment is carried out to molten steel, then molten steel is poured in ingot mold, pouring molten steel temperature is at 1440-1460 DEG C, cast first slow, in fast, carefully rear, when molten steel arrives rising head 3/5, add heat preserving agent, ingot steel casting is after 5-10 minutes, then teeming 2-3 times;
(3) casting mold: when cast(ing) surface temperature is no more than 600 DEG C, the steel ingot demoulding, adopts external chill and adds the foundry processing of insulated feeder by destructive test and the method for observing macrofracture, revising external chill;
(4) Quench and temper process: when the austenitizing temperature of liner plate is at 980-1000 DEG C, soaking time 2 hours, quenches into pond, when backing surface temperature is lower than 300 DEG C, enter stove tempering, temperature is at 280-300 DEG C, be incubated 5 hours, then naturally cooling.
4. the preparation method of large-sized grinder high chrome cast iron lining plate according to claim 3, is characterized in that, described step (2) middle-weight rare earths is yttrium element.
5. the preparation method of large-sized grinder high chrome cast iron lining plate according to claim 3, is characterized in that, in described step (2), efficient composite modifying agent is the wherein one of potassium or sodium.
6. the preparation method of large-sized grinder high chrome cast iron lining plate according to claim 3, it is characterized in that, efficient composite modifying agent in described step (2), rare earth are the fritter being less than 45mm through being crushed to granularity respectively, dry the material of gained at 280 DEG C.
7. the preparation method of large-sized grinder high chrome cast iron lining plate according to claim 3, is characterized in that, described step (2) mesometamorphism process is poured method in adopting and wrapping and carried out Metamorphism treatment to molten steel.
8. the preparation method of large-sized grinder high chrome cast iron lining plate according to claim 3, is characterized in that, in described step (2), cast adopts bottom pouring cast steel ingot.
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| CN104328332B (en) * | 2014-10-24 | 2017-05-10 | 驻马店市三山耐磨材料有限公司 | High-chromium iron lining plate |
| CN105369122B (en) * | 2015-12-15 | 2017-07-07 | 石家庄三环阀门股份有限公司 | A kind of blast furnace distribution chute liner plate and preparation method thereof |
| CN105671277A (en) * | 2016-01-20 | 2016-06-15 | 广西丛欣实业有限公司 | Heat treatment method of martensitic stainless steel |
| CN106244939B (en) * | 2016-08-26 | 2018-09-21 | 江苏星源电站冶金设备制造有限公司 | A kind of wear-resistant liner and preparation method thereof |
| RU2634532C1 (en) * | 2017-02-06 | 2017-10-31 | Юлия Алексеевна Щепочкина | Cast iron |
| RU2634533C1 (en) * | 2017-02-06 | 2017-10-31 | Юлия Алексеевна Щепочкина | Cast iron |
| RU2643774C1 (en) * | 2017-02-15 | 2018-02-05 | Юлия Алексеевна Щепочкина | Cast iron |
| CN107365936B (en) * | 2017-06-15 | 2019-02-05 | 广西贺州市恒发机械铸造厂 | A kind of preparation process of high-chromium alloy cast-iron |
| CN111299518A (en) * | 2020-03-17 | 2020-06-19 | 中信重工机械股份有限公司 | Casting method of high-chromium cast iron spiral lining plate |
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| CN1029243C (en) * | 1990-02-15 | 1995-07-05 | 佳木斯工学院 | Anti-wear, high toughness cast iron |
| CN1036795C (en) * | 1994-06-28 | 1997-12-24 | 冶金工业部北京冶金设备研究院 | High strength and high chrome cast iron lining plate and its prodn. method |
| US20100183475A1 (en) * | 2009-01-21 | 2010-07-22 | Roman Radon | Chromium manganese - nitrogen bearing stainless alloy having excellent thermal neutron absorption ability |
| CN101690903B (en) * | 2009-08-14 | 2012-03-07 | 淮阴工学院 | Fracture-free high-chromium cast iron crusher hammer |
| CN102851570A (en) * | 2012-03-14 | 2013-01-02 | 宁波市圣盾机械制造有限公司 | High-carbon high-chromium refining plate casting of defibrator |
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