CN106884124A - A kind of wear-resisting collars of centrifugal casting and preparation method - Google Patents
A kind of wear-resisting collars of centrifugal casting and preparation method Download PDFInfo
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- CN106884124A CN106884124A CN201611254453.2A CN201611254453A CN106884124A CN 106884124 A CN106884124 A CN 106884124A CN 201611254453 A CN201611254453 A CN 201611254453A CN 106884124 A CN106884124 A CN 106884124A
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- molten iron
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D13/00—Centrifugal casting; Casting by using centrifugal force
- B22D13/04—Centrifugal casting; Casting by using centrifugal force of shallow solid or hollow bodies, e.g. wheels or rings, in moulds rotating around their axis of symmetry
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/40—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for rings; for bearing races
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/08—Ferrous alloys, e.g. steel alloys containing nickel
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
Abstract
The invention discloses a kind of wear-resisting collars of centrifugal casting and preparation method, components of working layer and weight percentage are C 1.50~2.30, Si 0.20~1.00, Mn 0.20~1.00, Ni 0.20~1.20, Cr 2.00~5.00, Mo 0.20~1.00, P≤0.03%, S≤0.03%, V 0.20~0.6%, balance of Fe and inevitable impurity；Core constituents and weight percentage are C 1.00~1.80%, Si 1.20~1.80%, Mn 0.60~1.00%, P≤0.03%, S≤0.03%, and remaining is Fe and inevitable impurity.Processing step includes：a）Smelt：The inside and outside layer molten iron of melting, goes out before electric furnace to be added in outer layers molten iron composite and stirs respectively, and nodularization Metamorphism treatment is carried out before internal layer molten iron goes out electric furnace；b）Centrifugal casting：Outer layer molten iron is poured into casting mold；After outer layer molten steel solidification, by internal layer molten iron casting to casting mold, roll collar workblank is solidified to obtain under apocarpy；c）Heat treatment；d）Final process.The collars anti-wear performance obtained by preparation method of the invention improves 1.5 times or so.
Description
Technical field
The casting method for centrifugal of Metal matrix composite is added during collars product the present invention relates to produce, belongs to metal
Field of material preparation.
Background technology
With the serious surplus of steel industry production capacity, major steel mill more payes attention to energy-saving, to collars product
Wearability, anti-accident performance propose higher and higher requirement, while having requirement higher using surface quality to collars.
At present, the mainly high-carbon half steel centrifugal compound collars of collars product, anti-wear performance is poor, uses lower machine surface matter
Amount is coarse, and the surface quality influence on stocking is larger, and anti-accident performance there is also certain defect, especially use the middle and later periods
The crackle of appearance, peeling even crack conditions are also happened occasionally, and roll surface temperature is improved after long-time is rolled, under the hardness of roll
Drop, is worn and torn larger, and with the reduction using thickness degree, hardness drop can be decreased.Meanwhile, existing collars on the market
Product typically relies primarily on the carbide that separates out in matrix to be worn and torn, and wearability is poor, in use wear extent phase
To larger, cause collars product service life not enough.
The content of the invention
The technical problem to be solved in the invention is directed to not enough a kind of centrifugal casting wear resistant roll of offer of the prior art
Ring and preparation method.
In order to solve the above technical problems, the technical solution adopted in the present invention is：
A kind of wear-resisting collars of centrifugal casting, including graphitic steel material core, it is characterised in that：Including adding Metal Substrate
The work outer layer of the half steel material of granules composite material,
Each alloying component of working lining and weight percentage are C 1.50~2.30, Si 0.20~1.00, Mn 0.20~
1.00, Ni 0.20~1.20, Cr 2.00~5.00, Mo 0.20~1.00, P≤0.03%, S≤0.03%, V 0.20~
0.6%, balance of Fe and inevitable impurity；
Each alloying component of core and weight percentage are C 1.00~1.80%, Si 1.20~1.80%, Mn 0.60
~1.00%, P≤0.03%, S≤0.03%, remaining is Fe and inevitable impurity.
A kind of preparation method of the wear-resisting collars of centrifugal casting, comprises the following steps that：
A) smelt：The inside and outside layer molten iron of melting is distinguished in middle frequency furnace, metal is added in outer layers molten iron before going out electric furnace
Simultaneously temperature control stirring is uniform for base particulate composite, and nodularization Metamorphism treatment is carried out before internal layer molten iron goes out electric furnace；
B) centrifugal casting：The outer layer molten iron of Metal matrix composite will be added to pour into the casting mold of high speed rotation；
After outer layer molten steel solidification, by the casting mold of internal layer molten iron casting to high speed rotation, solidification obtains roll collar workblank under apocarpy；
C) it is heat-treated：Qualified roll collar workblank is carried out into stress relief annealing, furnace cooling after annealing carries out preprocessing, then
Cooled down after secondary normalizing, temper；
D) final process：Collars after the completion of heat treatment is finished by size, collars is made, and is carried out UT, hard
Degree and metallographic detection, rear storage up to standard.
Technical solution of the present invention further improvement is that：Metal matrix composite is adding outer layer iron in step a)
The pre-heat treatment is carried out before water, the temperature of the pre-heat treatment is 450~500 DEG C.
Technical solution of the present invention further improvement is that：The addition time of Metal matrix composite is in step a)
5~10 minutes before coming out of the stove.
Technical solution of the present invention further improvement is that：Metal matrix composite is TiC and WC in step a)
Composite.
Technical solution of the present invention further improvement is that：The density of the Metal matrix composite is 7.0~
7.5g/cm3, granularity is 1~3mm, and the quality for adding Metal matrix composite is the 5%~7% of outer layer molten steel quality.
Technical solution of the present invention further improvement is that：Controlled after addition Metal matrix composite in step b)
Temperature is 1550~1580 DEG C, and the speed of stirring is 40~60 revs/min.
Technical solution of the present invention further improvement is that：The outer layer iron of Metal matrix composite is added in step b)
The centrifugal rotational speed of water is 300~400 revs/min.
Technical solution of the present invention further improvement is that：Heat treatment time is 120~160h, normalizing temperature in step c)
It it is 900~1000 DEG C, temperature is 500~600 DEG C, chilling temperature is 100~110 DEG C after tempering.
By adopting the above-described technical solution, the technological progress that the present invention is obtained is：
, using by molten iron in the direct electric furnace of Metal matrix composite, after power transmission stirs, control is suitable for the present invention
When opportunity pour into the mould rotated at a high speed on centrifuge, cast out using centrifugation and contain metal-base particles composite wood
The wear-resisting collars product of material, the collars anti-wear performance obtained by preparation method of the invention improves 1.5 times or so.
The present invention the smelting stage before going out electric furnace by being actively added the high Metal Substrate of wearability in outer layer molten iron
Particulate composite, the abrasion resistant particles after decomposing is relied primarily on during collars use and is worn and torn, and has collars product
More excellent performance, the Metal matrix composite that the wearability of addition is high includes TiC, WC, its relative density
Density than outer layer molten iron is big so that composite can be uniformly distributed in outer layer molten iron；Meanwhile, it is being added to centrifuge
After die cavity under centrifuge rotation, each abrasion resistant particles can very well be distributed in the working lining of outer layer, during collars use
Rely primarily on the abrasion resistant particles after decomposing to be worn and torn, make collars product that there is more excellent performance.
The present invention Metal matrix composite that outer layers molten iron is added in the smelting process be in advance by preheating at
Reason, by carrying out the pre-heat treatment to Metal matrix composite, preheating temperature typically uses 450~500 DEG C, improves metal
The wetability of base particulate composite and molten steel matrix.
Specific embodiment
The present invention is described in further details below：
A kind of wear-resisting collars of centrifugal casting, including graphitic steel material core, including add Metal matrix composite
Half steel material work outer layer,
Each alloying component of working lining and weight percentage are C 1.50~2.30, Si 0.20~1.00, Mn 0.20~
1.00, Ni 0.20~1.20, Cr 2.00~5.00, Mo 0.20~1.00, P≤0.03%, S≤0.03%, V 0.20~
0.6%, balance of Fe and inevitable impurity；
Each alloying component of core and weight percentage are C 1.00~1.80%, Si 1.20~1.80%, Mn 0.60
~1.00%, P≤0.03%, S≤0.03%, remaining is Fe and inevitable impurity.
A kind of preparation method of the wear-resisting collars of centrifugal casting, comprises the following steps that：
A) smelt：The inside and outside layer molten iron of melting, 5~10 minutes outer layers molten iron before electric furnace is gone out are distinguished in middle frequency furnace
Metal matrix composite after middle addition the pre-heat treatment, the Metal matrix composite is combined for the alloy of TiC and WC
Material, its density is 7.0~7.5g/cm3, granularity is 1~3mm, and the quality for adding Metal matrix composite is outer layer iron
The 5%~7% of water quality, the temperature of the pre-heat treatment is 450~500 DEG C；Then control temperature for 1550~1580 DEG C, electromagnetism is stirred
Speed is mixed for 40~60 revs/min, is stirred, nodularization Metamorphism treatment is carried out before internal layer molten iron goes out electric furnace；
B) centrifugal casting：The outer layer molten iron of Metal matrix composite will be added to pour into the casting mold of high speed rotation,
The rotating speed of centrifuge is 300~400 revs/min；After outer layer molten iron reaches certain thickness to be solidified, internal layer molten iron casting is arrived
At a high speed in the casting mold of rotation, solidification obtains roll collar workblank under apocarpy；
C) it is heat-treated：Qualified roll collar workblank is carried out into stress relief annealing, heat treatment time is 120~160h, insulation knot
Furnace cooling after beam, carries out preprocessing, is cooled to 100~110 DEG C after normalizing, temper again, and normalizing temperature is 900~
1000 DEG C, temperature is 500~600 DEG C；
D) final process：Collars after the completion of heat treatment is finished by size, collars is made, and is carried out UT, hard
Degree and metallographic detection, rear storage up to standard.
The present invention is described in further details with reference to embodiment：
Embodiment 1,
A kind of wear-resisting collars of centrifugal casting, each alloying component of working lining and weight percentage be C 1.50, Si 0.20,
Mn 0.60, Ni 0.80, Cr 2.00, Mo 0.65, P 0.01%, S 0.02%, V 0.20%, balance of Fe and inevitable
Impurity.
Each alloying component of core and weight percentage are C 1.00%, Si 1.90%, Mn 0.65%, P 0.02%, S
0.01%, remaining is Fe and inevitable impurity.
A kind of preparation method of the wear-resisting collars of centrifugal casting, comprises the following steps that：
A) smelt：The inside and outside layer molten iron of melting is distinguished in middle frequency furnace, is added in 5 minutes outer layers molten iron before going out electric furnace
Enter the Metal matrix composite after the pre-heat treatment, the Metal matrix composite is the composite of TiC and WC, and its is close
Degree is 7.0g/cm3, granularity is 1mm, and the quality for adding Metal matrix composite is the 5% of outer layer molten steel quality, at preheating
The temperature of reason is 450 DEG C；Then it is 1550 DEG C to control temperature, and electromagnetic agitation speed is 40 revs/min, is stirred, in internal layer
Molten iron carries out nodularization Metamorphism treatment before going out electric furnace；
B) centrifugal casting：The outer layer molten iron of Metal matrix composite will be added to pour into the casting mold of high speed rotation,
The rotating speed of centrifuge is 300 revs/min；When outer layer molten steel solidification reaches certain thickness, by internal layer molten iron casting at a high speed
In the casting mold of rotation, solidification obtains roll collar workblank under apocarpy；
C) it is heat-treated：Qualified roll collar workblank is carried out into stress relief annealing, heat treatment time is 120h, insulation terminate after with
Stove is cooled down, and carries out preprocessing, is cooled to 100 DEG C after normalizing, temper again, and normalizing temperature is 900 DEG C, and temperature is
500℃；
D) final process：Collars after the completion of heat treatment is finished by size, collars is made, and is carried out UT, hard
Degree and metallographic detection, rear storage up to standard.
Embodiment 2,
The present embodiment is with the difference of embodiment 1：
Each alloying component of working lining and weight percentage are C 1.90, Si 0.80, Mn 0.20, Ni 1.20, Cr
2.90, Mo 0.95, P 0.03%, S 0.03%, V 0.60%, balance of Fe and inevitable impurity.
Each alloying component of core and weight percentage are C 1.80%, Si 1.80%, Mn 1.00%, P 0.01%, S
0.01%, remaining is Fe and inevitable impurity.
A kind of preparation method of the wear-resisting collars of centrifugal casting, the difference with embodiment 1 is：
A) smelt：Metal matrix composite after addition the pre-heat treatment in 8 minutes outer layers molten iron before going out electric furnace,
The density of the Metal matrix composite is 7.2g/cm3, granularity is 2.5mm, adds the quality of Metal matrix composite
It is the 8% of outer layer molten steel quality, the temperature of the pre-heat treatment is 500 DEG C；Then it is 1580 DEG C to control temperature, and electromagnetic agitation speed is
50 revs/min；
B) centrifugal casting：The outer layer molten iron of Metal matrix composite will be added to pour into the casting mold of high speed rotation,
The rotating speed of centrifuge is 350 revs/min；
C) it is heat-treated：Heat treatment time is 145h, and normalizing temperature is 980 DEG C, and temperature is 580 DEG C, is cooled down after tempering
Temperature is to 110 DEG C.
Embodiment 3,
The present embodiment is with the difference of embodiment 1：
Each alloying component of working lining and weight percentage are C 2.30, Si 1.00, Mn 1.00, Ni 0.20, Cr
5.00, Mo 1.00, P 0.03%, S 0.03%, V 0.60%, balance of Fe and inevitable impurity.
Each alloying component of core and weight percentage are C 1.50%, Si 1.20%, Mn 0.78%, P 0.02%, S
0.02%, remaining is Fe and inevitable impurity.
A kind of preparation method of the wear-resisting collars of centrifugal casting, the difference with embodiment 1 is：
A) smelt：Metal-base particles composite wood after addition the pre-heat treatment in 10 minutes outer layers molten iron before going out electric furnace
Material, the density of the Metal matrix composite is 7.5g/cm3, granularity is 3.0mm, adds Metal matrix composite
Quality is the 7% of outer layer molten steel quality, and the temperature of the pre-heat treatment is 480 DEG C；Then it is 1565 DEG C to control temperature, electromagnetic agitation speed
Spend is 60 revs/min；
B) centrifugal casting：The outer layer molten iron of Metal matrix composite will be added to pour into the casting mold of high speed rotation,
The rotating speed of centrifuge is 400 revs/min；
C) it is heat-treated：Heat treatment time is 145h, and normalizing temperature is 1000 DEG C, and temperature is 600 DEG C, is cooled down after tempering
Temperature is to 105 DEG C.
Embodiment 4,
The present embodiment is with the difference of embodiment 1：
Each alloying component of working lining and weight percentage are C 2.00, Si 0.80, Mn 0.80, Ni 0.50, Cr
4.00, Mo 0.90, P 0.01%, S 0.01%, V 0.50%, balance of Fe and inevitable impurity.
Each alloying component of core and weight percentage are C 1.75%, Si 1.75%, Mn 1.00%, P 0.03%, S
0.03%, remaining is Fe and inevitable impurity.
A kind of preparation method of the wear-resisting collars of centrifugal casting, the difference with embodiment 1 is：
A) smelt：Metal matrix composite after addition the pre-heat treatment in 9 minutes outer layers molten iron before going out electric furnace,
The density of the Metal matrix composite is 7.3g/cm3, granularity is 2.5mm, adds the quality of Metal matrix composite
It is the 5% of outer layer molten steel quality, the temperature of the pre-heat treatment is 500 DEG C；Then it is 1570 DEG C to control temperature, and electromagnetic agitation speed is
55 revs/min；
B) centrifugal casting：The outer layer molten iron of Metal matrix composite will be added to pour into the casting mold of high speed rotation,
The rotating speed of centrifuge is 380 revs/min；
C) it is heat-treated：Heat treatment time is 140h, and normalizing temperature is 950 DEG C, and temperature is 560 DEG C, is cooled down after tempering
Temperature is to 100 DEG C.
Claims (9)
1. a kind of core of the wear-resisting collars of centrifugal casting, including graphitic steel material, it is characterised in that：Including adding metal-base particles
The work outer layer of the half steel material of composite,
Each alloying component of working lining and weight percentage are C 1.50~2.30, Si 0.20~1.00, Mn 0.20~1.00,
Ni 0.20~1.20, Cr 2.00~5.00, Mo 0.20~1.00, P≤0.03%, S≤0.03%, V 0.20~0.6%,
Balance of Fe and inevitable impurity；
Each alloying component of core and weight percentage are C 1.00~1.80%, Si 1.20~1.80%, Mn 0.60~
1.00%, P≤0.03%, S≤0.03%, remaining is Fe and inevitable impurity.
2. a kind of preparation method of the wear-resisting collars of centrifugal casting, comprises the following steps that：
A) smelt：The inside and outside layer molten iron of melting is distinguished in middle frequency furnace, Metal Substrate is added in outer layers molten iron before going out electric furnace
Simultaneously temperature control stirring is uniform for granules composite material, and nodularization Metamorphism treatment is carried out before internal layer molten iron goes out electric furnace；
B) centrifugal casting：The outer layer molten iron of Metal matrix composite will be added to pour into the casting mold of high speed rotation；Outer layer
After molten steel solidification, by the casting mold of internal layer molten iron casting to high speed rotation, solidification obtains roll collar workblank under apocarpy；
C) it is heat-treated：Qualified roll collar workblank is carried out into stress relief annealing, furnace cooling after annealing carries out preprocessing, again just
Cooled down after fire, temper；
D) final process：Collars after the completion of heat treatment is finished by size, collars is made, and carry out UT, hardness and
Metallographic detection, rear storage up to standard.
3. the preparation method of the wear-resisting collars of a kind of centrifugal casting according to claim 1, it is characterised in that：Gold in step a)
Category base particulate composite will carry out the pre-heat treatment before outer layer molten iron is added, and the temperature of the pre-heat treatment is 450~500 DEG C.
4. the preparation method of the wear-resisting collars of a kind of centrifugal casting according to claim 3, it is characterised in that：Gold in step a)
The addition time for belonging to base particulate composite is 5~10 minutes before coming out of the stove.
5. the preparation method of the wear-resisting collars of a kind of centrifugal casting according to claim 1, it is characterised in that：Gold in step a)
Category base particulate composite is the composite of TiC and WC.
6. the preparation method of the wear-resisting collars of a kind of centrifugal casting according to claim 5, it is characterised in that：The Metal Substrate
The density of particulate composite is 7.0~7.5g/cm3, granularity is 1~3mm, and adding the quality of Metal matrix composite is
The 5%~7% of outer layer molten steel quality.
7. the preparation method of the wear-resisting collars of a kind of centrifugal casting according to claim 1, it is characterised in that：Add in step a)
It is 1550~1580 DEG C to enter the temperature controlled after Metal matrix composite, and the speed of stirring is 40~60 revs/min.
8. the preparation method of the wear-resisting collars of a kind of centrifugal casting according to claim 1, it is characterised in that：Add in step b)
The centrifugal rotational speed for entering the outer layer molten iron of Metal matrix composite is 300~400 revs/min.
9. the preparation method of the wear-resisting collars of a kind of centrifugal casting according to claim 1, it is characterised in that：Heat in step c)
Process time is 120~160h, and normalizing temperature is 900~1000 DEG C, and temperature is 500~600 DEG C, chilling temperature after tempering
It is 100~110 DEG C.
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| CN108103414A (en) * | 2017-12-15 | 2018-06-01 | 苏州浩焱精密模具有限公司 | A kind of anti-oxidant mold and its production method |
| CN111136245A (en) * | 2019-12-26 | 2020-05-12 | 中钢集团邢台机械轧辊有限公司 | Roll collar for bar mill reducing and sizing mill set and preparation method thereof |
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| CN115044836A (en) * | 2022-08-15 | 2022-09-13 | 江苏凯达重工股份有限公司 | Improved graphite semisteel roller and preparation method thereof |
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| CN108103414A (en) * | 2017-12-15 | 2018-06-01 | 苏州浩焱精密模具有限公司 | A kind of anti-oxidant mold and its production method |
| CN111136245A (en) * | 2019-12-26 | 2020-05-12 | 中钢集团邢台机械轧辊有限公司 | Roll collar for bar mill reducing and sizing mill set and preparation method thereof |
| CN112692259A (en) * | 2020-12-08 | 2021-04-23 | 山东天物成型科技有限公司 | Production process of super-wear-resistant bimetal hob ring |
| CN112828257A (en) * | 2020-12-29 | 2021-05-25 | 中钢集团邢台机械轧辊有限公司 | Pouring method utilizing end face profiling of centrifugal composite roll collar |
| CN115070004A (en) * | 2022-05-20 | 2022-09-20 | 中钢集团邢台机械轧辊有限公司 | Casting method of metal type centrifugal roll collar |
| CN115070004B (en) * | 2022-05-20 | 2023-05-05 | 中钢集团邢台机械轧辊有限公司 | Casting method of metal centrifugal roll collar |
| CN115044836A (en) * | 2022-08-15 | 2022-09-13 | 江苏凯达重工股份有限公司 | Improved graphite semisteel roller and preparation method thereof |
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