CN104988431A - High manganese steel sieve plate for crusher and preparation method of sieve plate - Google Patents
High manganese steel sieve plate for crusher and preparation method of sieve plate Download PDFInfo
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Abstract
The invention discloses a high manganese steel sieve plate for a crusher and a preparation method of the sieve plate. The sieve plate comprises a base plate, wherein a plurality of sieve holes are formed in the base plate; the base plate is made from high manganese steel; the high manganese steel comprises chemical element components in percentage by mass as follows: 1.25-1.45 % of C, 13.5-15.0 % of Mn, 2.5-3.5 % of Cr, 1.2-2.5 % of Si, 0.15-0.35 % of Mo, 0.35-0.55 % of B, 0.15-0.25 % of Ti, no more than 0.05 % of S, no more than 0.05 % of P and the balance of Fe. The preparation method comprises the steps of evaporative pattern preparation, modeling, smelting, slag removing, modification treatment, pouring, sand removing, water-toughening and the like. Compared with the prior art, the high manganese steel sieve plate for the crusher is manufactured by adopting high manganese steel with an evaporative pattern casting method; and the manufactured sieve plate has the advantages of excellent wear resistance, high strength, long service life, low cost and the like.
Description
Technical field
The present invention relates to crusher technical field, more specifically to a kind of crusher high mangaenese steel sieve plate and preparation method thereof.
Background technology
High violent steel sieve plate is the conventional anti-friction alloy foundry goods of the various screening ore particles such as ore dressing, building materials, metallurgy, be particularly useful for sieving under vibration condition, general ZGMn13 only uses some months work-ing life, use various size (screen size) sieve plate that ZGMn13Cr2 produces under lost foam casting process instead, reaction after producer's use for many years, life-span increases by 2 times, 3 times, more than 4 times, receives praises from customers.
Lost foam casting (also known as cavityless casting) is with porous plastics (EPS, STMMA or EPMMA) lost foam casting process macromolecular material make become and the design of part that casting will be produced, the duplicate full mold mould of size, (strengthening is played through dip-coating refractory paint, bright and clean, permeation functions) and after drying, be embedded in drystone sand through three-dimensional vibrating moulding, casting molding flask pours into molten metal liquid under negative pressure state, make macromolecular material model by thermal evaporation extraction, and then the disposal molding New Casting Technique formed after being replaced cooled and solidified by liquid metal produces the novel casting method of foundry goods.
Application number is disclose the casting technique of high manganese steel lining plate that a kind of as cast condition uses in the invention of 201310750049.4, and it specifically includes the design of metal mold and processing, metal type sand-covering, melting are cast, cooled and correction step.
Application number is disclose a kind of lost foam casting high mangaenese steel workpiece method in the invention of 201210428704.X, the method realizes mainly through following technical scheme: during molding, at the easy processing metal structural part needing the position built-in of processing to weld in advance, during cast, hardware and foundry goods melt and are cast as one, the hardware that during machining, a workhardness is lower.The invention has the beneficial effects as follows: substantially reduce difficulty of processing, improve the dimensional precision at Mechanical processing of casting position, not only reduce expenses, reduce costs, and simple to operate, do not affect product result of use again.
But all need in aforesaid method to adopt hardware as evaporative pattern, design is with tooling cost is higher, process redundancy is larger.
Summary of the invention
In order to overcome the shortcoming of above-mentioned technology, the invention provides a kind of crusher high mangaenese steel sieve plate and preparation method thereof, the sieve plate of production has the advantages such as wear resistance is good, intensity is high, long service life, cost are low.
The technical scheme that technical solution problem of the present invention adopts is: a kind of crusher high mangaenese steel sieve plate, described sieve plate comprises the substrate being provided with some sieve apertures, the material of described substrate is high mangaenese steel, the chemical element composition contained in described high mangaenese steel and mass percent as follows: C:1.25 ~ 1.45%, Mn:13.5 ~ 15.0%, Cr:2.5 ~ 3.5%, Si:1.2 ~ 2.5%, Mo:0.15 ~ 0.35%, B:0.35 ~ 0.55%, Ti:0.15 ~ 0.25%, S :≤0.05%, P :≤0.05%; Surplus is Fe.
Further, the chemical element composition contained in described high mangaenese steel and mass percent as follows: C:1.30 ~ 1.45%, Mn:14.0 ~ 15.0%, Cr:2.5 ~ 3.5%, Si:1.2 ~ 2.5%, Mo:0.15 ~ 0.25%, B:0.35 ~ 0.55%, Ti:0.15 ~ 0.25%, S :≤0.04%, P :≤0.04%; Surplus is Fe.
Preferably, the chemical element composition contained in described high mangaenese steel and mass percent as follows: C:1.35%, Mn:14.3%, Cr:3.0%, Si:1.5%, Mo:0.20%, B:0.45%, Ti:0.18%, S:0.04%, P:0.04%; Surplus is Fe.
Preferably, the chemical element composition contained in described high mangaenese steel and mass percent as follows: C:1.40%, Mn:14.6%, Cr:2.8%, Si:1.8%, Mo:0.25%, B:0.50%, Ti:0.20%, S:0.04%, P:0.04%; Surplus is Fe.
A preparation method for crusher high mangaenese steel sieve plate, described preparation method mainly comprises the following steps:
Step 1: moulding, first spreads the thick sand of 150mm, jolt ramming bottom sandbox, shake smooth and strike off, then the sieve plate evaporative pattern prepared is hung in sandbox, in putting, in knockout bucket, cloth bag type evenly adds sand, limit vibrates, Bian Jiasha, stops adding sand during to molding sand from sandbox 10 ~ 20mm, end face paving plastic film, good with dry sand gland, place sprue cup, to be poured;
Step 2: melting, is melt into molten steel by ordinary scrap steel, the pig iron by electric furnace, molten steel molten clear after add ferromanganese, ferrochrome, molybdenum-iron, ferrosilicon, melt completely, adjusting component, meets the massfraction requirement of the chemical composition of above-mentioned high mangaenese steel, temperature is risen to 1550 ~ 1600 DEG C to composition;
Step 3: skim: adopt aluminum strip to carry out final deoxygenation process, the weight of aluminum strip is 0.3 ~ 0.35% of molten steel weight;
Step 4: Metamorphism treatment: pour method in employing bag and Metamorphism treatment is carried out to the molten steel after deoxidation, hand mixing, leave standstill 2 ~ 3 minutes, then pour into a mould;
Step 5: cast, controlled by liquid steel temperature, after 1500 DEG C ~ 1550 DEG C, to pour in sieve plate evaporative pattern, teeming temperature controls at 1400 DEG C ~ 1550 DEG C, and soaking time is 2 ~ 3 hours;
Step 6: sand removal, after casting complete, carries out sand removal process; Then hard edges is cleared up, polishing inspection;
Step 7: water-tenacity treatment, is deposited into the foundry goods cleared up in high temperature heat treatment furnace and puts well, seal fire door, black furnace intensification 40 ~ 100 DEG C/h, is warming up to 650 DEG C of insulation 1.0 ~ 2.0h; Be warming up to 1050 ~ 1100 DEG C again and continue insulation about 1.0h, be greater than 950 DEG C of shrends, the water temperature in pond keeps less than 40 DEG C;
Step 8: after foundry goods air cooling to room temperature, removing is watered, rising head, then carries out an acceptance inspection to product, enters storehouse, stacking, classification warehouse-in.
Further, in described cast step, during cast, in sandbox, control negative pressure value 0.015 ~ 0.025MPa, after being poured, crossing 3 ~ 5min and remove vacuum again.
Further, in the process of whole cast, the B that quality of molten steel is 1.5% ~ 2.0% will be accounted for
4c particle adds with stream from start to finish equably, forms sieve plate foundry goods with this.
Further, in described step of overall modelling, adopt rubber type three-dimensional vibrating-compaction table, the frequency of vibrating motor is 50Hz, and time of vibration is 60 ~ 90s, and amplitude is 0.3 ~ 0.5mm.
In the preparation method of above-mentioned high mangaenese steel sieve plate, the making method of sieve plate evaporative pattern is as follows: first, consider that the casting technique of lost foam casting calculates shrinkage by sieve plate drawing requirement, then, on white die cutter platform, EPS sheet material is cut with nichrome wire, be that screen size is pressed out one by one at hollow Sheet Steel Pipe outside diameter, make the white mould of sieve plate; Arrange the ingate of the white mould of sieve plate; Swabbing; Stand-by.
Further, the concrete operations of described swabbing are: first the white mould of every part sieve plate is entered the oven dry of 45 ~ 55 DEG C, drying room, brush a coating by hand, especially to notice that each hole of sieve plate all wants even paint, then to dry, then brush second time, then enter the case that to fall after drying room is dried.
The invention has the beneficial effects as follows: compared with prior art, crusher high mangaenese steel sieve plate provided by the invention adopts high mangaenese steel to be produced by lost-foam casting method, and the sieve plate of production has the advantages such as wear resistance is good, intensity is high, long service life, cost are low.
Embodiment
Below in conjunction with embodiment, illustrate the present invention further, following embodiment should be understood and be only not used in for illustration of the present invention and limit the scope of the invention.
Embodiment 1
A kind of crusher high mangaenese steel sieve plate, described sieve plate comprises the substrate being provided with some sieve apertures, the material of described substrate is high mangaenese steel, the chemical element composition contained in described high mangaenese steel and mass percent as follows: C:1.25%, Mn:13.5%, Cr:3.5%, Si:2.5%, Mo:0.25%, B:0.50%, Ti:0.25%, S:0.04%, P:0.04%; Surplus is Fe.
The preparation method of above-mentioned crusher high mangaenese steel sieve plate mainly comprises the following steps:
Step 1: moulding, first spreads the thick sand of 150mm, jolt ramming bottom sandbox, shake smooth and strike off, then the sieve plate evaporative pattern prepared is hung in sandbox, in putting, in knockout bucket, cloth bag type evenly adds sand, limit vibrates, Bian Jiasha, stops adding sand during to molding sand from sandbox 10 ~ 20mm, end face paving plastic film, good with dry sand gland, place sprue cup, to be poured; In above-mentioned step of overall modelling, adopt rubber type three-dimensional vibrating-compaction table, the frequency of vibrating motor is 50Hz, and time of vibration is 60 ~ 90s, and amplitude is 0.3 ~ 0.5mm.
Step 2: melting, is melt into molten steel by ordinary scrap steel, the pig iron by electric furnace, molten steel molten clear after add ferromanganese, ferrochrome, molybdenum-iron, ferrosilicon, melt completely, adjusting component, meets the massfraction requirement of the chemical composition of above-mentioned high mangaenese steel, temperature is risen to 1550 ~ 1560 DEG C to composition;
Step 3: skim: adopt aluminum strip to carry out final deoxygenation process, the weight of aluminum strip is 0.3% of molten steel weight;
Step 4: Metamorphism treatment: pour method in employing bag and Metamorphism treatment is carried out to the molten steel after deoxidation, hand mixing, leave standstill 2 ~ 3 minutes, then pour into a mould;
Step 5: cast, controlled by liquid steel temperature, after 1500 DEG C ~ 1550 DEG C, to pour in sieve plate evaporative pattern, teeming temperature controls at 1450 DEG C ~ 1550 DEG C, and soaking time is 2 hours; During cast, in sandbox, control negative pressure value 0.015 ~ 0.025MPa, after being poured, crossing 3 ~ 5min and remove vacuum again.In the process of whole cast, the B that quality of molten steel is 1.5% ~ 2.0% will be accounted for
4c particle adds with stream from start to finish equably, forms sieve plate foundry goods with this.
Step 6: sand removal, after casting complete, carries out sand removal process; Then hard edges is cleared up, polishing inspection;
Step 7: water-tenacity treatment, is deposited into the foundry goods cleared up in high temperature heat treatment furnace and puts well, seal fire door, black furnace intensification 40 ~ 100 DEG C/h, is warming up to 650 DEG C of insulation 1.0 ~ 2.0h; Be warming up to 1050 ~ 1100 DEG C again and continue insulation about 1.0h, be greater than 950 DEG C of shrends, the water temperature in pond keeps less than 40 DEG C;
Step 8: after foundry goods air cooling to room temperature, removing is watered, rising head, then carries out an acceptance inspection to product, enters storehouse, stacking, classification warehouse-in.
In the preparation method of above-mentioned high mangaenese steel sieve plate, the making method of sieve plate evaporative pattern is as follows: first, consider that the casting technique of lost foam casting calculates shrinkage by sieve plate drawing requirement, then, on white die cutter platform, EPS sheet material is cut with nichrome wire, be that screen size is pressed out one by one at hollow Sheet Steel Pipe outside diameter, make the white mould of sieve plate; Arrange the ingate of the white mould of sieve plate; Swabbing; Stand-by.
The concrete operations of above-mentioned swabbing are: first the white mould of every part sieve plate is entered the oven dry of 45 ~ 55 DEG C, drying room, brush a coating by hand, especially will notice that each hole of sieve plate all wants even paint, then dry, then brush second time, then enter the case that to fall after drying room is dried.
Embodiment 2
A kind of crusher high mangaenese steel sieve plate, described sieve plate comprises the substrate being provided with some sieve apertures, the material of described substrate is high mangaenese steel, the chemical element composition contained in described high mangaenese steel and mass percent as follows: C:1.35%, Mn:14.3%, Cr:3.0%, Si:1.5%, Mo:0.20%, B:0.45%, Ti:0.18%, S:0.04%, P:0.04%; Surplus is Fe.
The preparation method of above-mentioned crusher high mangaenese steel sieve plate mainly comprises the following steps:
Step 1: moulding, first spreads the thick sand of 150mm, jolt ramming bottom sandbox, shake smooth and strike off, then the sieve plate evaporative pattern prepared is hung in sandbox, in putting, in knockout bucket, cloth bag type evenly adds sand, limit vibrates, Bian Jiasha, stops adding sand during to molding sand from sandbox 10 ~ 20mm, end face paving plastic film, good with dry sand gland, place sprue cup, to be poured; In above-mentioned step of overall modelling, adopt rubber type three-dimensional vibrating-compaction table, the frequency of vibrating motor is 50Hz, and time of vibration is 60 ~ 90s, and amplitude is 0.3 ~ 0.5mm.
Step 2: melting, is melt into molten steel by ordinary scrap steel, the pig iron by electric furnace, molten steel molten clear after add ferromanganese, ferrochrome, molybdenum-iron, ferrosilicon, melt completely, adjusting component, meets the massfraction requirement of the chemical composition of above-mentioned high mangaenese steel, temperature is risen to 1560 ~ 1570 DEG C to composition;
Step 3: skim: adopt aluminum strip to carry out final deoxygenation process, the weight of aluminum strip is 0.32% of molten steel weight;
Step 4: Metamorphism treatment: pour method in employing bag and Metamorphism treatment is carried out to the molten steel after deoxidation, hand mixing, leave standstill 2 ~ 3 minutes, then pour into a mould;
Step 5: cast, controlled by liquid steel temperature, after 1500 DEG C ~ 1550 DEG C, to pour in sieve plate evaporative pattern, teeming temperature controls at 1480 DEG C ~ 1550 DEG C, and soaking time is 2 hours; During cast, in sandbox, control negative pressure value 0.015 ~ 0.025MPa, after being poured, crossing 3 ~ 5min and remove vacuum again.In the process of whole cast, the B that quality of molten steel is 1.5% ~ 2.0% will be accounted for
4c particle adds with stream from start to finish equably, forms sieve plate foundry goods with this.
Step 6: sand removal, after casting complete, carries out sand removal process; Then hard edges is cleared up, polishing inspection;
Step 7: water-tenacity treatment, is deposited into the foundry goods cleared up in high temperature heat treatment furnace and puts well, seal fire door, black furnace intensification 40 ~ 100 DEG C/h, is warming up to 650 DEG C of insulation 1.0 ~ 2.0h; Be warming up to 1050 ~ 1100 DEG C again and continue insulation about 1.0h, be greater than 950 DEG C of shrends, the water temperature in pond keeps less than 40 DEG C;
Step 8: after foundry goods air cooling to room temperature, removing is watered, rising head, then carries out an acceptance inspection to product, enters storehouse, stacking, classification warehouse-in.
In the preparation method of above-mentioned high mangaenese steel sieve plate, the making method of sieve plate evaporative pattern is with embodiment 1.
Embodiment 3
A kind of crusher high mangaenese steel sieve plate, described sieve plate comprises the substrate being provided with some sieve apertures, the material of described substrate is high mangaenese steel, the chemical element composition contained in described high mangaenese steel and mass percent as follows: C:1.40%, Mn:14.6%, Cr:2.8%, Si:1.8%, Mo:0.25%, B:0.50%, Ti:0.20%, S:0.04%, P:0.04%; Surplus is Fe.
The preparation method of above-mentioned crusher high mangaenese steel sieve plate is with embodiment 2.
In the preparation method of above-mentioned high mangaenese steel sieve plate, the making method of sieve plate evaporative pattern is with embodiment 1.
Embodiment 4
A kind of crusher high mangaenese steel sieve plate, described sieve plate comprises the substrate being provided with some sieve apertures, the material of described substrate is high mangaenese steel, the chemical element composition contained in described high mangaenese steel and mass percent as follows: C:1.45%, Mn:15.0%, Cr:2.5%, Si:1.5%, Mo:0.25%, B:0.35%, Ti:0.15%, S:0.04%, P:0.04%; Surplus is Fe.
The preparation method of above-mentioned crusher high mangaenese steel sieve plate is with embodiment 2.
In the preparation method of above-mentioned high mangaenese steel sieve plate, the making method of sieve plate evaporative pattern is with embodiment 1.
Above embodiment is only for illustration of the present invention; and be not limitation of the present invention; the those of ordinary skill of relevant technical field; without departing from the spirit and scope of the present invention; can also make a variety of changes and modification; therefore all equivalent technical schemes also belong to category of the present invention, and scope of patent protection of the present invention should be defined by the claims.
Claims (10)
1. a crusher high mangaenese steel sieve plate, it is characterized in that: described sieve plate comprises the substrate being provided with some sieve apertures, the material of described substrate is high mangaenese steel, the chemical element composition contained in described high mangaenese steel and mass percent as follows: C:1.25 ~ 1.45%, Mn:13.5 ~ 15.0%, Cr:2.5 ~ 3.5%, Si:1.2 ~ 2.5%, Mo:0.15 ~ 0.35%, B:0.35 ~ 0.55%, Ti:0.15 ~ 0.25%, S :≤0.05%, P :≤0.05%; Surplus is Fe.
2. a kind of crusher high mangaenese steel sieve plate according to claim 1, is characterized in that: the chemical element composition contained in described high mangaenese steel and mass percent as follows: C:1.30 ~ 1.45%, Mn:14.0 ~ 15.0%, Cr:2.5 ~ 3.5%, Si:1.2 ~ 2.5%, Mo:0.15 ~ 0.25%, B:0.35 ~ 0.55%, Ti:0.15 ~ 0.25%, S :≤0.04%, P :≤0.04%; Surplus is Fe.
3. a kind of crusher high mangaenese steel sieve plate according to claim 1 and 2, is characterized in that: the chemical element composition contained in described high mangaenese steel and mass percent as follows: C:1.35%, Mn:14.3%, Cr:3.0%, Si:1.5%, Mo:0.20%, B:0.45%, Ti:0.18%, S:0.04%, P:0.04%; Surplus is Fe.
4. a kind of crusher high mangaenese steel sieve plate according to claim 1 and 2, is characterized in that: the chemical element composition contained in described high mangaenese steel and mass percent as follows: C:1.40%, Mn:14.6%, Cr:2.8%, Si:1.8%, Mo:0.25%, B:0.50%, Ti:0.20%, S:0.04%, P:0.04%; Surplus is Fe.
5. a preparation method for crusher high mangaenese steel sieve plate according to claim 1, is characterized in that: described preparation method mainly comprises the following steps:
Step 1: moulding, first spreads the thick sand of 150mm, jolt ramming bottom sandbox, shake smooth and strike off, then the sieve plate evaporative pattern prepared is hung in sandbox, in putting, in knockout bucket, cloth bag type evenly adds sand, limit vibrates, Bian Jiasha, stops adding sand during to molding sand from sandbox 10 ~ 20mm, end face paving plastic film, good with dry sand gland, place sprue cup, to be poured;
Step 2: melting, is melt into molten steel by ordinary scrap steel, the pig iron by electric furnace, molten steel molten clear after add ferromanganese, ferrochrome, molybdenum-iron, ferrosilicon, melt completely, adjusting component, meets the massfraction requirement of the chemical composition of above-mentioned high mangaenese steel, temperature is risen to 1550 ~ 1600 DEG C to composition;
Step 3: skim: adopt aluminum strip to carry out final deoxygenation process, the weight of aluminum strip is 0.3 ~ 0.35% of molten steel weight;
Step 4: Metamorphism treatment: pour method in employing bag and Metamorphism treatment is carried out to the molten steel after deoxidation, hand mixing, leave standstill 2 ~ 3 minutes, then pour into a mould;
Step 5: cast, controlled by liquid steel temperature, after 1500 DEG C ~ 1550 DEG C, to pour in sieve plate evaporative pattern, teeming temperature controls at 1400 DEG C ~ 1550 DEG C, and soaking time is 2 ~ 3 hours;
Step 6: sand removal, after casting complete, carries out sand removal process; Then hard edges is cleared up, polishing inspection;
Step 7: water-tenacity treatment, is deposited into the foundry goods cleared up in high temperature heat treatment furnace and puts well, seal fire door, black furnace intensification 40 ~ 100 DEG C/h, is warming up to 650 DEG C of insulation 1.0 ~ 2.0h; Be warming up to 1050 ~ 1100 DEG C again and continue insulation about 1.0h, be greater than 950 DEG C of shrends, the water temperature in pond keeps less than 40 DEG C;
Step 8: after foundry goods air cooling to room temperature, removing is watered, rising head, then carries out an acceptance inspection to product, enters storehouse, stacking, classification warehouse-in.
6. the preparation method of crusher high mangaenese steel sieve plate according to claim 5, is characterized in that: in described cast step, during cast, controls negative pressure value 0.015 ~ 0.025MPa in sandbox, after being poured, crossing 3 ~ 5min and removes vacuum again.
7. the preparation method of crusher high mangaenese steel sieve plate according to claim 5, is characterized in that: in the process of whole cast, will account for the B that quality of molten steel is 1.5% ~ 2.0%
4c particle adds with stream from start to finish equably, forms sieve plate foundry goods with this.
8. the preparation method of crusher high mangaenese steel sieve plate according to claim 5, is characterized in that: in described step of overall modelling, and adopt rubber type three-dimensional vibrating-compaction table, the frequency of vibrating motor is 50Hz, and time of vibration is 60 ~ 90s, and amplitude is 0.3 ~ 0.5mm.
9. the preparation method of crusher high mangaenese steel sieve plate according to claim 5, it is characterized in that: the making method of described sieve plate evaporative pattern is as follows: first, consider that the casting technique of lost foam casting calculates shrinkage by sieve plate drawing requirement, then, on white die cutter platform, EPS sheet material is cut with nichrome wire, be that screen size is pressed out one by one at hollow Sheet Steel Pipe outside diameter, make the white mould of sieve plate; Arrange the ingate of the white mould of sieve plate; Swabbing; Stand-by.
10. the preparation method of crusher high mangaenese steel sieve plate according to claim 9, it is characterized in that: the concrete operations of described swabbing are: first the white mould of every part sieve plate is entered the oven dry of 45 ~ 55 DEG C, drying room, brush a coating by hand, especially to notice that each hole of sieve plate all wants even paint, then dry, brush second time again, then the case that falls after entering drying room oven dry.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105420616A (en) * | 2015-11-05 | 2016-03-23 | 宁国市南方耐磨材料有限公司 | High-carbon middle-chromium abrasion-resistant steel ball |
| CN109338233A (en) * | 2018-12-12 | 2019-02-15 | 国家电投集团黄河上游水电开发有限责任公司 | Alloy material for carbon kneader static reamer for aluminum |
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| CN102000620A (en) * | 2010-10-28 | 2011-04-06 | 淮阴工学院 | Integrated crushing tooth of grading crusher and manufacturing method thereof |
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| CN109338233A (en) * | 2018-12-12 | 2019-02-15 | 国家电投集团黄河上游水电开发有限责任公司 | Alloy material for carbon kneader static reamer for aluminum |
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Application publication date: 20151021 |