CN106884124B - 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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- CN106884124B CN106884124B CN201611254453.2A CN201611254453A CN106884124B CN 106884124 B CN106884124 B CN 106884124B CN 201611254453 A CN201611254453 A CN 201611254453A CN 106884124 B CN106884124 B CN 106884124B
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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 methods, 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%, surplus are 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%, and S≤0.03%, remaining is Fe and inevitable impurity.Processing step includes: a) to smelt: the inside and outside layer molten iron of melting respectively, and composite material is added before electric furnace in outer layers molten iron out and stirs, 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) it is heat-treated；D) final process.The collars wear-resisting property that preparation method through the invention obtains improves 1.5 times or so.
Description
Technical field
The present invention relates to the casting method for centrifugal that Metal matrix composite is added when production collars product, belong to metal
Field of material preparation.
Background technique
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 increasingly higher demands, while having higher requirement using surface quality to collars.
Currently, the mainly high-carbon half steel centrifugal compound collars of collars product, wear-resisting property is poor, uses lower machine surface matter
It measures coarse, is affected to the surface quality of stocking, and anti-accident performance also suffers from certain drawbacks, and especially uses the middle and later periods
The crackle of appearance, peeling even crack conditions also happen occasionally, and roll surface temperature improves after long-time rolls, under the hardness of roll
Drop, abrasion is larger, and with the reduction for using thickness degree, hardness drop can be decreased.Meanwhile existing collars on the market
Product relies primarily on the carbide that is precipitated in matrix generally to be worn, and wearability is poor, in use abrasion loss phase
To larger, cause collars product service life insufficient.
Summary of the invention
The technical problem to be solved in the invention is to provide a kind of centrifugal casting wear resistant roll aiming at the shortcomings in the prior art
Ring and preparation method.
In order to solve the above technical problems, the technical scheme adopted by the invention is that:
A kind of wear-resisting collars of centrifugal casting, the core including graphite steel material, it is characterised in that: including Metal Substrate is added
The work outer layer of 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%, surplus is 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) it smelts: distinguishing the inside and outside layer molten iron of melting in middle frequency furnace, metal is added in outer layers molten iron before electric furnace out
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 that Metal matrix composite is added is poured into high-speed rotating casting mold；
After outer layer molten steel solidification, by internal layer molten iron casting to high-speed rotating casting mold, solidification obtains roll collar workblank under apocarpy；
C) it being heat-treated: qualified roll collar workblank is subjected to stress relief annealing, furnace cooling after annealing carries out preprocessing, then
It is cooling after secondary normalizing, tempering；
D) final process: the collars after the completion of heat treatment is finished by size, and collars is made, and carries out UT, hard
Degree and metallographic detection, are put in storage after up to standard.
Technical solution of the present invention further improvement lies in that: in step a) Metal matrix composite be added outer layer iron
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 lies in 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 lies in that: Metal matrix composite is TiC and WC in step a)
Composite material.
Technical solution of the present invention further improvement lies in that: the density of the Metal matrix composite is 7.0~
7.5g/cm3, granularity is 1~3mm, and the quality that Metal matrix composite is added is the 5%~7% of outer layer molten steel quality.
Technical solution of the present invention further improvement lies in that: be added in step b) after Metal matrix composite and to control
Temperature is 1550~1580 DEG C, and the speed of stirring is 40~60 revs/min.
Technical solution of the present invention further improvement lies in 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 lies in that: in step c) heat treatment time be 120~160h, normalizing temperature
It is 900~1000 DEG C, tempering temperature is 500~600 DEG C, and cooling temperature is 100~110 DEG C after tempering.
By adopting the above-described technical solution, the technological progress achieved by the present invention is:
The present invention is used in molten iron in the direct electric furnace of Metal matrix composite, and after mixing evenly, control is suitable for power transmission
When opportunity pour on centrifuge in high-speed rotating mold, cast out using centrifugation containing metal-base particles composite wood
The wear-resisting collars product of material, the collars wear-resisting property that preparation method through the invention obtains improve 1.5 times or so.
The present invention is in the smelting stage by being actively added the high Metal Substrate of wearability in outer layer molten iron before electric furnace out
Particulate composite relies primarily on the abrasion resistant particles after decomposing in collars use process and is worn, has collars product
More excellent service performance, the high Metal matrix composite of the wearability of addition include TiC, WC, relative density
It is bigger than the density of outer layer molten iron, composite material is uniformly distributed in outer layer molten iron；Meanwhile being added to centrifuge
After type chamber under centrifuge rotation, each abrasion resistant particles can be distributed in the working lining of outer layer very well, in collars use process
It relies primarily on the abrasion resistant particles after decomposing to be worn, makes collars product that there is more excellent service performance.
The present invention Metal matrix composite that outer layers molten iron is added in smelting process is in advance by preheating
Reason, by carrying out the pre-heat treatment to Metal matrix composite, preheating temperature generally 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, the core including graphite steel material, including Metal matrix composite is added
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%, surplus is 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) it smelts: distinguishing the inside and outside layer molten iron of melting, 5~10 minutes outer layers molten iron before electric furnace out in middle frequency furnace
Metal matrix composite after middle addition the pre-heat treatment, the Metal matrix composite are that the alloy of TiC and WC is compound
Material, density are 7.0~7.5g/cm3, granularity is 1~3mm, and the quality that Metal matrix composite is added is outer layer iron
The 5%~7% of water quality, the temperature of the pre-heat treatment are 450~500 DEG C；Then controlled at 1550~1580 DEG C, electromagnetism is stirred
Mixing speed is 40~60 revs/min, is stirred evenly, and nodularization Metamorphism treatment is carried out before internal layer molten iron goes out electric furnace；
B) centrifugal casting: the outer layer molten iron that Metal matrix composite is added is poured into high-speed rotating casting mold,
The revolving speed of centrifuge is 300~400 revs/min；After outer layer molten iron reaches certain thickness solidification, internal layer molten iron casting is arrived
In high-speed rotating casting mold, solidification obtains roll collar workblank under apocarpy；
C) it is heat-treated: qualified roll collar workblank being subjected to stress relief annealing, heat treatment time is 120~160h, heat preservation knot
Furnace cooling after beam carries out preprocessing, is cooled to 100~110 DEG C after normalizing, tempering again, and normalizing temperature is 900~
1000 DEG C, tempering temperature is 500~600 DEG C；
D) final process: the collars after the completion of heat treatment is finished by size, and collars is made, and carries out UT, hard
Degree and metallographic detection, are put in storage after up to standard.
The present invention is described in further details below 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%, surplus is for Fe and unavoidably
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) it smelts: distinguishing the inside and outside layer molten iron of melting in middle frequency furnace, add in 5 minutes outer layers molten iron before electric furnace out
Metal matrix composite after entering the pre-heat treatment, which is the composite material of TiC and WC, close
Degree is 7.0g/cm3, granularity 1mm, the quality that Metal matrix composite is added is the 5% of outer layer molten steel quality, at preheating
The temperature of reason is 450 DEG C；Then controlled at 1550 DEG C, electromagnetic agitation speed is 40 revs/min, is stirred evenly, in internal layer
Molten iron carries out nodularization Metamorphism treatment before going out electric furnace；
B) centrifugal casting: the outer layer molten iron that Metal matrix composite is added is poured into high-speed rotating casting mold,
The revolving speed of centrifuge is 300 revs/min；When outer layer molten steel solidification reaches certain thickness, by internal layer molten iron casting to high speed
In the casting mold of rotation, solidification obtains roll collar workblank under apocarpy；
C) be heat-treated: qualified roll collar workblank be subjected to stress relief annealing, heat treatment time 120h, after heat preservation with
Furnace is cooling, carries out preprocessing, is cooled to 100 DEG C after normalizing, tempering again, and normalizing temperature is 900 DEG C, and tempering temperature is
500℃；
D) final process: the collars after the completion of heat treatment is finished by size, and collars is made, and carries out UT, hard
Degree and metallographic detection, are put in storage after up to standard.
Embodiment 2,
The present embodiment and the difference of embodiment 1 are:
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%, surplus are 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, difference from example 1 is that:
A) it smelts: the Metal matrix composite after the pre-heat treatment is added in 8 minutes outer layers molten iron before electric furnace out,
The density of the Metal matrix composite is 7.2g/cm3, the quality of Metal matrix composite is added in granularity 2.5mm
It is the 8% of outer layer molten steel quality, the temperature of the pre-heat treatment is 500 DEG C；Then controlled at 1580 DEG C, electromagnetic agitation speed is
50 revs/min；
B) centrifugal casting: the outer layer molten iron that Metal matrix composite is added is poured into high-speed rotating casting mold,
The revolving speed of centrifuge is 350 revs/min；
C) be heat-treated: heat treatment time 145h, normalizing temperature are 980 DEG C, and tempering temperature is 580 DEG C, cooling after tempering
Temperature is to 110 DEG C.
Embodiment 3,
The present embodiment and the difference of embodiment 1 are:
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%, surplus are 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, difference from example 1 is that:
A) it smelts: the metal-base particles composite wood after the pre-heat treatment is added in 10 minutes outer layers molten iron before electric furnace out
Material, the density of the Metal matrix composite is 7.5g/cm3, Metal matrix composite is added in granularity 3.0mm
Quality is the 7% of outer layer molten steel quality, and the temperature of the pre-heat treatment is 480 DEG C；Then controlled at 1565 DEG C, electromagnetic agitation is fast
Degree is 60 revs/min；
B) centrifugal casting: the outer layer molten iron that Metal matrix composite is added is poured into high-speed rotating casting mold,
The revolving speed of centrifuge is 400 revs/min；
C) be heat-treated: heat treatment time 145h, normalizing temperature are 1000 DEG C, and tempering temperature is 600 DEG C, cooling after tempering
Temperature is to 105 DEG C.
Embodiment 4,
The present embodiment and the difference of embodiment 1 are:
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%, surplus are 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, difference from example 1 is that:
A) it smelts: the Metal matrix composite after the pre-heat treatment is added in 9 minutes outer layers molten iron before electric furnace out,
The density of the Metal matrix composite is 7.3g/cm3, the quality of Metal matrix composite is added in granularity 2.5mm
It is the 5% of outer layer molten steel quality, the temperature of the pre-heat treatment is 500 DEG C；Then controlled at 1570 DEG C, electromagnetic agitation speed is
55 revs/min；
B) centrifugal casting: the outer layer molten iron that Metal matrix composite is added is poured into high-speed rotating casting mold,
The revolving speed of centrifuge is 380 revs/min；
C) be heat-treated: heat treatment time 140h, normalizing temperature are 950 DEG C, and tempering temperature is 560 DEG C, cooling after tempering
Temperature is to 100 DEG C.
Claims (1)
1. a kind of preparation method of the wear-resisting collars of centrifugal casting, it is characterised in that: the wear-resisting collars of centrifugal casting, including graphite steel
The core of matter, further include be added Metal matrix composite half steel material work outer layer, each alloying component of working lining and
Weight percentage is 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%, surplus be 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；
It comprises the following steps that:
A) it smelts: distinguishing the inside and outside layer molten iron of melting in middle frequency furnace, Metal Substrate is added in outer layers molten iron before electric furnace out
Simultaneously temperature control stirring is uniform for granules composite material, and nodularization Metamorphism treatment, metal-base particles composite wood are carried out before internal layer molten iron goes out electric furnace
The addition time of material is 5~10 minutes before coming out of the stove, and Metal matrix composite will carry out pre- before outer layer molten iron is added
Heat treatment, the temperature of the pre-heat treatment are 450~500 DEG C, be added the temperature controlled after Metal matrix composite be 1550~
1580 DEG C, the speed of stirring is 40~60 revs/min, and Metal matrix composite is the composite material of TiC and WC, Metal Substrate
The density of particulate composite is 7.0~7.5g/cm3, granularity is 1~3mm, and the quality that Metal matrix composite is added is
The 5%~7% of outer layer molten steel quality；
B) centrifugal casting: the outer layer molten iron that Metal matrix composite is added is poured into high-speed rotating casting mold, is added
The centrifugal rotational speed of the outer layer molten iron of Metal matrix composite is 300~400 revs/min；After outer layer molten steel solidification, by internal layer
In molten iron casting to high-speed rotating casting mold, solidification obtains roll collar workblank under apocarpy；
C) it is heat-treated: qualified roll collar workblank being subjected to stress relief annealing, furnace cooling after annealing carries out preprocessing, again just
Fire, cooling after tempering, heat treatment time is 120~160h, and normalizing temperature is 900~1000 DEG C, tempering temperature is 500~
600 DEG C, cooling temperature is 100~110 DEG C after tempering；
D) final process: the collars after the completion of heat treatment is finished by size, and collars is made, and carry out UT, hardness and
Metallographic detection is put in storage after up to standard.
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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 |
| CN111136245B (en) * | 2019-12-26 | 2022-06-17 | 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 |
| 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 |
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