CN104722743B - A kind of preparation method of hammer mill composite hammer head - Google Patents
A kind of preparation method of hammer mill composite hammer head Download PDFInfo
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- CN104722743B CN104722743B CN201510081518.7A CN201510081518A CN104722743B CN 104722743 B CN104722743 B CN 104722743B CN 201510081518 A CN201510081518 A CN 201510081518A CN 104722743 B CN104722743 B CN 104722743B
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Abstract
A kind of preparation method of hammer mill composite hammer head, its step are：1）Prepare composite hammer head casting mold；2）Ceramic particle is fixed on be used to prepare in casting mold tup using position cavity at；3）Mould assembling, is fixed on mechanical vibrator, first pours into a mould low-carbon low-alloy steel, then pours into a mould rich chromium cast iron, and starts mechanical vibrator while rich chromium cast iron is poured into a mould, and mechanical oscillation make casting solidification, and composite hammer head is obtained through processing after cooling；4）Composite hammer head is heat-treated.The present invention using position ceramic particle using in tup due to strengthening rich chromium cast iron composite material, installation region is using the good low-carbon low-alloy steel of obdurability, and composite hammer head is prepared using the compound method of biliquid, rich chromium cast iron liquid is accelerated to be spread with low-carbon and low-alloy molten steel interface element with mechanical vibration method at the same time, combined so as to obtain stable metallurgical interface, realize composite hammer head high-wearing feature and high-strength tenacity, make eroded area not easily to fall off, service life is grown, and the manufacture craft of the present invention is simple, manufacture cost is low, highly practical.
Description
Technical field
The present invention relates to a kind of preparation method of hammer head of hammer crusher, is specifically related to a kind of hammer mill compound hammer
The preparation method of head.
Background technology
Hammer mill wearing piece tup crushes building stones in the case where high speed rotates, it is desirable to which tup will be had high wear-resisting using position
Property, installation position will have high obdurability, and homogenous material is difficult to ensure that tup applying working condition, can be very using the method for compound preparation
The problem that is i.e. wear-resisting and having high obdurability that homogenous material is faced is solved well.But the preparation side of existing composite material hammer head
Existing in terms of method and material selection need to much solve the problems, such as.
The Chinese patent application of Publication No. CN201530904A discloses a kind of composite material hammer head of crusher and its bears
Casting method is pressed, that patent describes the method using vacuum negative pressure cast by the compound potassium steel of WC, steel alloy and ordinary carbon steel
Composite hammer head is prepared, but WC used in the patent is higher than great, price, production cost, and matrix used material is potassium steel, alloy
Steel or carbon steel hardness are low, and under impact wear operating mode, matrix quick abrasion is small to WC supporting roles, and WC is easily peeled off, it is difficult to plays WC
Effect, and with vacuum negative pressure cast complex process.
The Chinese patent application of Publication No. CN102872941A discloses a kind of compound hammer mill of double-fluid double metal
With tup and preparation method thereof, this method is to use swallow-tail form partition plate between tup and hammer handle in casting mold cavity, then at the same time
Two kinds of different metals are poured into a mould, composite hammer head is made after cooling.One of this method is it is critical that partition plate has been difficult to realize
Fine melt solution, influences the metallurgical binding at tup and hammer handle interface, furthermore the pollutant such as steam of baffle surface is difficult to fully erased, pole
Easily reacted with molten metal, form slag at interface, can also influence interface cohesion, therefore, the stability of the invention is poor.
The Chinese patent application of Publication No. CN101607304A discloses a kind of compound technology for covering edge of big hammer, the technique
In hammer handle both sides composite high-chromium iron-cast material, method uses dielectric barrier, first pours into a mould rich chromium cast iron, pouring temperature 1350~1400
DEG C, after 15~35 seconds, pour into a mould carbon steel, pouring temperature 1450~1530, sand removal after solidification and composite hammer head is made, which deposits
The problem of it is similar with the Chinese patent application of Publication No. CN102872941A, due to the presence of partition plate, two kinds of metals are difficult to
Form metallurgical binding.
The Chinese patent application of Publication No. CN2023439170A discloses a kind of casting of double-fluid double metal vertical-type tup
Type device, the method which prepares composite hammer head：Chill is placed at bi-metal interface.The invention there are the problem of
It is, when molten metal is contacted in interface with chill, since metal cooling velocity is fast at chill, easily to form cold shut in interface
Defect, during tup use, tup comes off at cold shut.
The Chinese patent application of Publication No. CN102873308SA discloses a kind of lost foam casting of double-fluid double metal and answers
The method for closing grinder hammerhead, this method prepares composite hammer head using evaporative pattern vacuum casting method, first using evaporative pattern
Method, the residue in composite hammer head can become formation of crack and tup phenomenon of rupture occur；Furthermore interface is not taken in the invention
The method of metallurgical binding.
The above-mentioned various methods for preparing composite hammer head have the disadvantage that：
1）Biliquid compound interface is difficult to obtain stable metallurgical binding, and tup abrading section is carried using wear resistance of high-chromium iron
It is high limited；
2）Hard particles enhancing base steel composite hammer head in, WC is easily peeled off, fragmentation, at the same WC than it is great, price is high, significantly carry
Rise product cost and Energy in use, it is difficult to industrialization.
The content of the invention
It is an object of the invention to there are problem and shortage for above-mentioned, there is provided one kind manufacture cost is low, and interface has good
Good metallurgical binding, and there is high-wearing feature and high-strength tenacity, eroded area is not easily to fall off, the hammer mill of service life length
The preparation method of composite hammer head.
The technical proposal of the invention is realized in this way：
The preparation method of hammer mill composite hammer head of the present invention, its main feature is that the composite hammer head uses position
The rich chromium cast iron based composites strengthened using ceramic particle are made, and installation position is made of low-carbon low-alloy steel, Gao Gezhu
The interface of iron and steel alloy is metallurgical binding, and specific implementation step is as follows：
1）Composite hammer head casting mold is prepared, which is provided with a sprue, two ingates, positioned at the ingate of bottom
It is used as to pour into a mould low-carbon low-alloy steel, the ingate positioned at upper strata is used as to pour into a mould rich chromium cast iron, while the casting mold is additionally provided with one
Peep hole, the peep hole double as composite hammer head riser；
2）Ceramic particle is fixed on be used to prepare in casting mold tup using position cavity at；
3）Mould assembling, is fixed on mechanical vibrator, first pours into a mould low-carbon low-alloy steel, then pours into a mould rich chromium cast iron, and is pouring
Mechanical vibrator is started while noting rich chromium cast iron, mechanical oscillation make casting solidification, and after cooling, sand removal, removes dead head, flies
Side, obtains composite hammer head；
4）Composite hammer head is heat-treated, 950~1050 DEG C of quenchings are air-cooled, 450~500 DEG C of tempering.
Wherein, above-mentioned composite hammer head casting mold uses quartz sand, and adds waterglass as binding agent, passes through CO2Hardening and
Into, and the cavity surface brushing zirconium English powder quick drying paint of composite hammer head casting mold.
Above-mentioned steps 2）In first ceramic particle can be mixed with binding agent and be solidified into washed away with anti-metal liquid it is not defeated and dispersed
After there is the shapes of the three-dimensional more size degree of intercommunication for strip or the precast body of tabular between ability and ceramic particle, then it is fixed on casting mold
Tup is inside used to prepare to use at the cavity at position.
Above-mentioned steps 3）In be to pour into a mould low-carbon low-alloy steel from the ingate of bottom, pouring temperature is 1500~1600 DEG C,
Stop pouring when having observed molten steel spilling from peep hole, rich chromium cast iron liquid poured into a mould from the ingate on upper strata after suspending 10~15 seconds,
Pouring temperature is 1400~1450 DEG C.
The vibration frequency of above-mentioned mechanical vibrator is 10~40Hz, and amplitude is 0.5~1mm, to rich chromium cast iron during vibrations
Liquid is poured rear sustained vibration 1~5 minute, then stops vibrating.
The present invention using in tup due to using position（I.e.：Tup eroded area）Answered with ceramic particle enhancing rich chromium cast iron
Condensation material, installation region prepare composite hammer head using the good low-carbon low-alloy steel of obdurability, and using the compound method of biliquid, together
When with mechanical vibration method accelerate rich chromium cast iron liquid and low-carbon and low-alloy molten steel interface element to spread, so as to obtain stable interface smelting
Gold combines, and realizes composite hammer head high-wearing feature and high-strength tenacity, makes eroded area not easily to fall off, service life length, and the present invention
Manufacture craft is simple, manufacture cost is low, highly practical.
The present invention is further illustrated below in conjunction with the accompanying drawings.
Brief description of the drawings
Fig. 1 is the schematic diagram that the present invention prepares composite hammer head.
Fig. 2 is composite hammerhead structure schematic diagram prepared by the present invention.
Fig. 3 is cross-sectional views of the Fig. 2 at A-A.
Fig. 4 is another composite hammerhead structure schematic diagram prepared by the present invention.
Fig. 5 is cross-sectional views of the Fig. 4 at B-B.
Fig. 6 is the positive structure schematic of composite hammer head prepared by the present invention.
Fig. 7 is the overlooking the structure diagram of composite hammer head prepared by the present invention.
Embodiment
As shown in Fig. 1-Fig. 7, the hammer mill composite hammer head of the invention prepared is increased using position using ceramic particle
Strong rich chromium cast iron based composites are made, and installation position is made of low-carbon low-alloy steel, the boundary of rich chromium cast iron and steel alloy
Face is metallurgical binding.Its specific preparation method is as follows：
1）The preparation of composite hammer head casting mold 1 is the quartz sand using 20~140 mesh, and clay content ＜ 0.2%, adds 5% waterglass,
And use CO2Harden, brushing zirconium English powder quick drying paint in the cavity surface of casting mold；And the casting mold is provided with a sprue 2, two
Running channel, is used as to pour into a mould low-carbon low-alloy steel 6, the ingate 3 positioned at upper strata makees cast rich chromium cast iron 7 positioned at the ingate 4 of bottom
With, while the casting mold is additionally provided with a peep hole 5, which doubles as composite hammer head riser；
2）By Al2O3Ceramic particle or ZrO2Ceramic particle or ZTA ceramic particles are uniformly mixed with binding agent and are placed in stock mould
In tool, cure, obtain the shape with the more size degree of three-dimensional intercommunication as strip or tabular and washed away not with high temperature resistant metal liquid
The precast body 8 of defeated and dispersed ability；
3）Precast body 8 is fixed in above-mentioned casting mold and is used to prepare tup and uses position（I.e.：Tup eroded area）Type
At chamber；Tup eroded area is poured into a mould with Cr15 types or Cr20 types or Cr25 type rich chromium cast irons, the low conjunction of installation region low-carbon
Jin Gang is poured into a mould, due to needing it to have high obdurability, the weight of low-carbon and low-alloy composition of steel with high resistance to fracture
Amount percentage range is C:0.25~0.3%, alloying element content ＜ 3%, in order to obtain more preferable metallurgical quality, Mn must not be less than
0.5%, Si must not be less than 0.5%；
4）Mould assembling, is fixed on mechanical vibrator, distinguishes melting rich chromium cast iron liquid and low-carbon with two intermediate frequency furnaces
Low-alloy molten steel.After refining, low-carbon low-alloy steel first is poured into a mould from the ingate of bottom, pouring temperature is 1500~1600 DEG C, when
From peep hole it was observed that when having molten steel spilling, stop cast, after suspending 10~15 seconds, rich chromium cast iron is poured into a mould from the ingate on upper strata
Liquid, pouring temperature are 1400~1450 DEG C；And during cast rich chromium cast iron liquid, unlatching mechanical vibrator, vibration frequency 10~
40Hz, 0.5~1mm of amplitude, vibration continues 1~5 minute after rich chromium cast iron liquid is poured, then stops vibrating；
5）After casting solidification cooling, sand removal, remove feeders, overlap etc., obtain the composite hammer head containing ceramic particle；
6）Composite hammer head is heat-treated, 950~1050 DEG C of quenchings are air-cooled, and 450~500 DEG C of tempering are air-cooled.
Embodiment 1：
Rich chromium cast iron uses Cr15 types, and component is（Percentage by weight）C：3.6%, Cr：15%, Mo：0.5%, Ni：0.5%,
Si：0.6%, Mn：0.6%, S≤0.04%, P≤0.04%, remaining is Fe；
Low-carbon and low-alloy composition of steel（Percentage by weight）C：0.28%, Cr：1%, Si：0.6%, Mn：0.6%, P≤0.04%, S
≤ 0.04%, Al：0.025%, remaining is Fe；
Ceramic particle uses Al2O3Ceramic particle, by Al2O3Ceramic particle is mixed with 3% binding agent and is placed in shaper,
Cure, obtain Al2O3Ceramic particle precast body；
Composite hammer head casting mold uses the quartz sand of 20~140 mesh, and clay content ＜ 0.2%, adds 5% waterglass, and passes through CO2
Hardening forms, and brushing zircon sand quick drying paint in the cavity surface of casting mold；
Mould assembling, is fixed on mechanical vibrator, distinguishes melting Cr15 type rich chromium cast iron liquid and low-carbon with two intermediate frequency furnaces
Low-alloy molten steel.After refining degasification, first pour into a mould low-carbon low-alloy steel from the ingate of bottom, pouring temperature is 1550 DEG C, when from
When peep hole has observed molten steel spilling, stop cast, after 13 seconds, pour into a mould rich chromium cast iron liquid from the ingate on upper strata, cast is high
Mechanical vibrator, vibration frequency 15Hz, amplitude 0.6mm are opened while chrome cast iron liquid, rich chromium cast iron liquid is poured, vibration
Stop after continuing 2 minutes；
Composite hammer head solidification cooling, sand removal, removes dead head, overlap etc., obtains composite hammer head；
960 DEG C of composite hammer head hardening heat, air-cooled, 460 DEG C of tempering are air-cooled.The service life of the composite hammer head of acquisition is
3 times of high chrome material tup.
Embodiment 2：
The embodiment is a difference in that with embodiment 1：
Rich chromium cast iron uses Cr20 types, and component is（Percentage by weight）C：3.2%, Cr：20%, Mo：0.5%, Ni：0.5%,
Si：0.6%, Mn：0.6%, P≤0.04%, S≤0.04%, remaining is Fe；
Low-carbon and low-alloy composition of steel（Percentage by weight）C：0.3%, Cr：1%, Mn：0.6%, Si：0.6%, P≤0.04%, S
≤ 0.04%, Al：0.025%, remaining is Fe.
Embodiment 3：
The embodiment is a difference in that with embodiment 1：
Rich chromium cast iron uses Cr25 types, and component is（Percentage by weight）C：3%, Cr：25%, Mo：0.5%, Ni：0.5%, Si：
0.6%, Mn：0.6%, P≤0.04%, S≤0.04%, remaining is Fe；
Low-carbon and low-alloy composition of steel（Percentage by weight）C：0.3%, Cr：1%, Si：0.6%, Mn：0.6%, S≤0.04%, P≤
0.04%, Al：0.025%, remaining is Fe.
The present invention is described by embodiment, but is not limited the invention, with reference to description of the invention, institute
Other changes of disclosed embodiment, are such as readily apparent that, such change should belong to for the professional person of this area
Within the scope of the claims in the present invention limit.
Claims (2)
1. a kind of preparation method of hammer mill composite hammer head, it is characterised in that the composite hammer head uses ceramics using position
The rich chromium cast iron based composites of particle enhancing are made, and installation position is made of low-carbon low-alloy steel, rich chromium cast iron and alloy
The interface of steel is metallurgical binding,
With weight, the component of the low-carbon low-alloy steel is：C：0.28%, Cr：1%, Si：0.6%, Mn：
0.6%, P≤0.04%, S≤0.04%, Al：0.025%, remaining is Fe；The rich chromium cast iron uses Cr15 types；
Specific implementation step is as follows：
1) composite hammer head casting mold is prepared, which is provided with a sprue, two ingates, and the ingate positioned at bottom pours
Note low-carbon low-alloy steel to use, the ingate positioned at upper strata is used as to pour into a mould rich chromium cast iron, while the casting mold is additionally provided with an observation
Hole, the peep hole double as composite hammer head riser；
2) first ceramic particle is mixed and is solidified into binding agent and washed away with anti-metal liquid between not defeated and dispersed ability and ceramic particle
After shape with the more size degree of three-dimensional intercommunication is the precast body of strip or tabular, then it is fixed in casting mold and is used to prepare tup and makes
At the cavity at position；The ceramic particle is Al2O3 ceramic particles, and binding agent is the 3% of ceramic particle quality；
3) mould assembling, is fixed on mechanical vibrator, first pours into a mould low-carbon low-alloy steel, then pours into a mould rich chromium cast iron, and high in cast
Mechanical vibrator is started while chrome cast iron, the vibration frequency of mechanical vibrator is 15Hz, amplitude 0.6mm, and vibration is straight
Rear sustained vibration 2 minutes is poured to rich chromium cast iron liquid, then stops vibrating, mechanical oscillation make casting solidification, after cooling, clearly
Sand, removes dead head, overlap, obtains composite hammer head；It is to pour into a mould low-carbon low-alloy steel, cast from the ingate of bottom in step 3)
Temperature is 1550 DEG C, stops pouring when having observed molten steel spilling from peep hole, and pause is poured into a mould high from the ingate on upper strata after 13 seconds
Chrome cast iron liquid, pouring temperature are 1400~1450 DEG C；
4) composite hammer head is heat-treated, 960 DEG C of quenchings are air-cooled, 460 DEG C of tempering.
2. the preparation method of hammer mill composite hammer head according to claim 1, it is characterised in that above-mentioned composite hammer head
Casting mold uses quartz sand, and adds waterglass as binding agent, is formed by CO2 hardening, and the cavity surface of composite hammer head casting mold
Brushing zirconium English powder quick drying paint.
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105642868A (en) * | 2016-01-06 | 2016-06-08 | 洛阳市致力新材料有限公司 | Method for producing ceramic particle reinforced duplex metal base hammer through sand mold |
| CN105598367B (en) * | 2016-01-06 | 2017-10-24 | 洛阳市致力新材料有限公司 | A kind of method for producing Double-metal composite hammer upside down with evaporative pattern negative pressure of vacuum |
| CN105750498B (en) * | 2016-03-30 | 2018-07-31 | 柳州桂滨铸造有限公司 | Lost foam casting bimetal hammerhead running gate system |
| CN106735100B (en) * | 2016-11-10 | 2018-07-17 | 西安交通大学 | A kind of preparation method of the ZTA particle enhanced steel iron-based composite liners based on chemical activation processing |
| CN106623863B (en) * | 2016-11-10 | 2018-07-17 | 西安交通大学 | A kind of preparation method of the ZTA particle enhanced steel iron-based composite breaking walls based on chemical activation processing |
| CN110484809B (en) * | 2019-09-09 | 2020-07-07 | 广东省材料与加工研究所 | Composite hammer head, preparation method thereof and composite hammer head casting model |
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| JP2979492B2 (en) * | 1991-12-27 | 1999-11-15 | 株式会社大信洋行 | A method of compounding steel members and aluminum casting. |
| CN102211174B (en) * | 2011-05-07 | 2013-05-08 | 迁安市宏信铸造有限公司 | Process for casting wear-resistant hammer head by compounding two kinds of metal liquid |
| CN102357652B (en) * | 2011-08-30 | 2013-12-11 | 辽宁卓异新材料有限公司 | Multi-scale ceramic/metal composite abrasion-resistant material and preparation method thereof |
| CN103641487B (en) * | 2013-12-02 | 2014-12-31 | 昆明理工大学 | Preparation method and application of ceramic preform |
| CN104057066B (en) * | 2014-06-24 | 2016-06-15 | 广东省工业技术研究院(广州有色金属研究院) | A kind of preparation method of bimetallic biliquid composite hammer head |
| CN104259436A (en) * | 2014-09-05 | 2015-01-07 | 安徽省宁国市华达耐磨材料有限公司 | Vibration casting technology method for double-metal composite hammer head |
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