CN105316577A - Manufacturing method for large-scale high-carbon semi-steel material eccentric roll collar - Google Patents
Manufacturing method for large-scale high-carbon semi-steel material eccentric roll collar Download PDFInfo
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- CN105316577A CN105316577A CN201510712501.7A CN201510712501A CN105316577A CN 105316577 A CN105316577 A CN 105316577A CN 201510712501 A CN201510712501 A CN 201510712501A CN 105316577 A CN105316577 A CN 105316577A
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- outer section
- steel material
- inner core
- roll collar
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Classifications
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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
- C22C38/08—Ferrous alloys, e.g. steel alloys containing nickel
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- 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
- C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
-
- 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
Abstract
The invention discloses a manufacturing method for a large-scale high-carbon semi-steel material eccentric roll collar. The manufacturing method is used for manufacturing the large-scale high-carbon semi-steel material eccentric roll collar. The large-scale high-carbon semi-steel material eccentric roll collar comprises an outer layer part and an inner core part. The pouring process comprises the steps that firstly, smelting is conducted; secondly; pouring is conducted; thirdly, spheroidizing annealing is conducted; and fourthly, heat treatment is conducted in a mode that normalizing is combined with tempering. According to the manufacturing method, the inner quality of the roll collar can be improved, and the roll collar is made to be high in abrasive resistance and thermal cracking resistance.
Description
Technical field
The present invention relates to a kind of manufacture method of collars, the manufacture method of especially large-scale high-carbon half steel material anticentripetal roll collar.
Background technology
The development of rolling technique improves the quality of rolled products, decreases consumption, and the quality of breaker roll proposes high requirement simultaneously.Universal profiled rolling mill roll for rolled section steel product is exactly wherein a kind of, and along with steel rolling production process and equipment develop rapidly, its performance quality directly affects surface quality and the stocking cost of stocking, in Rolling production, occupy critical role.Therefore the research of breaker roll material and production technique, has become the problem that metallurgical roller manufacturer pays close attention to jointly.Shape mill universal frame roll is that collars is assemblied in the composite roller that mandrel combines by the mode of hot charging, and its collars material is generally high-carbon half steel material, and roll shaft is forged steel.This roll has concurrently and uses layer wear resistance good, and roll neck has again enough obdurabilities.Modern universal mill all adopts this roll, but for large-scale shape mill roll, because collars specification is larger, usual collars diameter is at ∮ more than 1300, require to propose requirements at the higher level to the inner quality of collars, higher wear resistance to be had on the one hand, also will have higher obdurability on the other hand, break to avoid collars.
Consider that Heavy Section Steel rolling line is to the demand of high-performance roll (collars), carry out the quality product research of further lifting high-carbon semi-steel roll collar, for ￠ more than 1300 large gauge collars product, in order to improve the rolling cycle of collars further, improve working lining wear resistance, also must ensure the security of collars simultaneously, again each alloying element be designed.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of heavy merchant mill high-carbon half steel material anticentripetal roll collar and manufacture method thereof, improves the inner quality of collars, makes collars have high wear resistance, hot-cracking resistance.
For solving the problems of the technologies described above, the technical solution used in the present invention is:
The manufacture method of large-scale high-carbon half steel material anticentripetal roll collar, large-scale high-carbon half steel material anticentripetal roll collar comprises outer section and inner core part, the alloy compositions of outer section and the weight percentage of each alloy compositions are, C:1.7 ~ 2.5%, Si:0.4 ~ 1.0%, Mn:0.7 ~ 1.5%, P≤0.03%; S≤0.03%, Cr:1.5 ~ 4.5%, Ni:0.3 ~ 1.5%, Mo+V+W:0.2 ~ 1.5%, all the other are Fe and inevitable impurity;
The alloy compositions of inner core part and the weight percentage of each alloy compositions be, C:0.5 ~ 1.5%, Si:1.0 ~ 2.0%, Mn:0.3 ~ 1.0%, P≤0.08%, S≤0.03%, Cr≤0.5, Ni≤0.5, Mo≤0.15, all the other are Fe and inevitable impurity.
Further improvement of the present invention is: the alloy compositions of outer section and the weight percentage of each alloy compositions be, C:1.7 ~ 2.1%, Si:0.5 ~ 0.9%, Mn:0.9 ~ 1.3%, P≤0.03%; S≤0.03%, Cr:2.0 ~ 4.0%, Ni:0.5 ~ 1.0%, Mo+V+W:0.5 ~ 1.5%, all the other are Fe and inevitable impurity;
The alloy compositions of inner core part and the weight percentage of each alloy compositions be, C:1.0 ~ 1.5%, Si:1.3 ~ 1.7%, Mn:0.5 ~ 1.0%, P≤0.08%, S≤0.03%, Cr≤0.5, Ni≤0.3, Mo≤0.13, all the other are Fe and inevitable impurity.
Further improvement of the present invention is: manufacture craft comprises the following steps,
A, smelting: outer section and inner core part are carried out melting according to corresponding component concentration mixing respectively;
B, cast: when outer section liquid steel temperature arrives 1400 ~ 1600 DEG C, carry out centrifugal casting, outer section concreting thickness reaches 180 ~ 240mm and stops cast, and the temperature after outer section casting complete is 1300 ~ 1400 DEG C; The molten steel that inner core divides melting is poured in outer section, until outer section center is filled up, casting complete;
C, carry out Spheroidizing Annealing;
D, the mode being added tempering by normalizing are heat-treated.
Further improvement of the present invention is: the weight ratio of outer section and inner core part is 1:2.
Further improvement of the present invention is: when pouring into a mould the molten steel of inner core part, the temperature of molten steel is 1400 ~ 1520 DEG C, and the duration of pouring is 2 ~ 5 hours.
Further improvement of the present invention is: step B mesectoderm part casting complete is to starting T=t ± 30 interval time of pouring into a mould inner core part "; Wherein t is approximate setting time.
Further improvement of the present invention is: approximate setting time is according to formula t=(D/2-Ds/2)
2/ K
2/ 100 calculate; In formula, t is approximate setting time; D is inner core section diameter; Ds is outer section diameter; K is coefficient, relevant with the material of foundry goods.
Owing to adopting technique scheme, the beneficial effect that the present invention produces is:
A kind of heavy merchant mill high-carbon half steel material anticentripetal roll collar of the present invention and manufacture method thereof, improve the inner quality of collars, make collars have high wear resistance, hot-cracking resistance.
The present invention, by the improvement of production technique, successfully have developed and is applicable to heavy merchant mill high-carbon half steel material anticentripetal roll collar.This collars material possesses high alloy characteristic, and alloy is evenly distributed, and effectively improves collars working lining performance index; By the innovation to collars casting technique, the collars key coat situation of loosening obtains larger improvement.
In the present invention, the alloy content total amount of working lining can bring up to 1.9% ~ 10.5%, and traditional high-carbon semi-steel roll collar alloy total amount is substantially between 1.4% ~ 2.0%, the raising of alloy content ensure that the wear resistance of work floor height, and the alloying elements such as C, Mn, Cr, Mo, V can be uniformly distributed, ensure that the alloy amount of dissolving in matrix carbon U content and matrix, add the intensity of matrix, while wear resistance improves, the hot-cracking resistance of collars is promoted.
Product of the present invention adopts rotary casting mode to produce, in order to promote the inner quality of collars, and outer section and core graded casting, improve the inner quality level of collars, especially the quality control of pair roller ring key coat non-densified regions, improves quality product, reduces collars and to break tendency.
Embodiment
The manufacture method of large-scale high-carbon half steel material anticentripetal roll collar, large-scale high-carbon half steel material anticentripetal roll collar comprises outer section and inner core part, the weight ratio of outer section and inner core part is 1:2, the alloy compositions of outer section and the weight percentage of each alloy compositions are, C:1.7 ~ 2.5%, Si:0.4 ~ 1.0%, Mn:0.7 ~ 1.5%, P≤0.03%; S≤0.03%, Cr:1.5 ~ 4.5%, Ni:0.3 ~ 1.5%, Mo+V+W:0.2 ~ 1.5%, all the other are Fe and inevitable impurity;
The alloy compositions of inner core part and the weight percentage of each alloy compositions be, C:0.5 ~ 1.5%, Si:1.0 ~ 2.0%, Mn:0.3 ~ 1.0%, P≤0.08%, S≤0.03%, Cr≤0.5, Ni≤0.5, Mo≤0.15, all the other are Fe and inevitable impurity.
The preferred version of the alloy compositions of outer section and the weight percentage of each alloy compositions is, C:1.7 ~ 2.1%, Si:0.5 ~ 0.9%, Mn:0.9 ~ 1.3%, P≤0.03%; S≤0.03%, Cr:2.0 ~ 4.0%, Ni:0.5 ~ 1.0%, Mo+V+W:0.5 ~ 1.5%, all the other are Fe and inevitable impurity;
The alloy compositions of inner core part and the weight percentage of each alloy compositions be, C:1.0 ~ 1.5%, Si:1.3 ~ 1.7%, Mn:0.5 ~ 1.0%, P≤0.08%, S≤0.03%, Cr≤0.5, Ni≤0.3, Mo≤0.13, all the other are Fe and inevitable impurity.
Manufacture craft comprises the following steps,
A, smelting: outer section and inner core part are carried out melting according to corresponding component concentration mixing respectively.
B, cast: carry out centrifugal casting when outer section liquid steel temperature arrives 1400 ~ 1600 DEG C, pouring speed is 30 ~ 40kg/s, outer section concreting thickness reaches 180 ~ 240mm and stops cast, and the temperature after outer section casting complete is 1300 ~ 1400 DEG C; After certain interval of time, pour into the molten steel that inner core divides melting in outer section, pouring speed is 8 ~ 20kg/s, when pouring into a mould the molten steel of inner core part, the temperature of molten steel is 1500 ~ 1600 DEG C, and the duration of pouring is 3 ~ 6 hours, until outer section center is filled up, casting complete.
Outer section casting complete is to starting T=t ± 30 interval time of pouring into a mould inner core part "; Wherein t is approximate setting time.Approximate setting time is according to formula t=(D/2-Ds/2)
2/ K
2/ 100 calculate; In formula, t is approximate setting time; D is inner core section diameter; Ds is outer section diameter; K is coefficient, relevant with the material of foundry goods, can get 1.5 ~ 3 by K according to different materials.
C, carry out Spheroidizing Annealing;
D, the mode being added tempering by normalizing are heat-treated.
Embodiment
A kind of for heavy merchant mill high-carbon half steel material anticentripetal roll collar, specification is ￠ 1402/645 × 626 ~ ￠ 1402/645 × 699, and working lining radius is 205 ~ 260mm, and hardness requirement is HSD59 ~ 64.
Table 1
Table 2
From in table, hardness meets the demands.
A kind of heavy merchant mill high-carbon half steel material anticentripetal roll collar of the present invention and manufacture method thereof, improve the inner quality of collars, make collars have high wear resistance, hot-cracking resistance.
Claims (7)
1. the manufacture method of large-scale high-carbon half steel material anticentripetal roll collar, it is characterized in that: large-scale high-carbon half steel material anticentripetal roll collar comprises outer section and inner core part, the alloy compositions of outer section and the weight percentage of each alloy compositions are, C:1.7 ~ 2.5%, Si:0.4 ~ 1.0%, Mn:0.7 ~ 1.5%, P≤0.03%; S≤0.03%, Cr:1.5 ~ 4.5%, Ni:0.3 ~ 1.5%, Mo+V+W:0.2 ~ 1.5%, all the other are Fe and inevitable impurity;
The alloy compositions of inner core part and the weight percentage of each alloy compositions be, C:0.5 ~ 1.5%, Si:1.0 ~ 2.0%, Mn:0.3 ~ 1.0%, P≤0.08%, S≤0.03%, Cr≤0.5, Ni≤0.5, Mo≤0.15, all the other are Fe and inevitable impurity.
2. the manufacture method of large-scale high-carbon half steel material anticentripetal roll collar according to claim 1, it is characterized in that: the alloy compositions of outer section and the weight percentage of each alloy compositions be, C:1.7 ~ 2.1%, Si:0.5 ~ 0.9%, Mn:0.9 ~ 1.3%, P≤0.03%; S≤0.03%, Cr:2.0 ~ 4.0%, Ni:0.5 ~ 1.0%, Mo+V+W:0.5 ~ 1.5%, all the other are Fe and inevitable impurity;
The alloy compositions of inner core part and the weight percentage of each alloy compositions be, C:1.0 ~ 1.5%, Si:1.3 ~ 1.7%, Mn:0.5 ~ 1.0%, P≤0.08%, S≤0.03%, Cr≤0.5, Ni≤0.3, Mo≤0.13, all the other are Fe and inevitable impurity.
3. the manufacture method of large-scale high-carbon half steel material anticentripetal roll collar according to claim 1 and 2, is characterized in that: manufacture craft comprises the following steps,
A, smelting: outer section and inner core part are carried out melting according to corresponding component concentration mixing respectively;
B, cast: when outer section liquid steel temperature arrives 1400 ~ 1600 DEG C, carry out centrifugal casting, outer section concreting thickness reaches 180 ~ 240mm and stops cast, and the temperature after outer section casting complete is 1300 ~ 1400 DEG C; The molten steel that inner core divides melting is poured in outer section, until outer section center is filled up, casting complete;
C, carry out Spheroidizing Annealing;
D, the mode being added tempering by normalizing are heat-treated.
4. the manufacture method of large-scale high-carbon half steel material anticentripetal roll collar according to claim 3, is characterized in that: the weight ratio of outer section and inner core part is 1:2.
5. the manufacture method of large-scale high-carbon half steel material anticentripetal roll collar according to claim 3, is characterized in that: when pouring into a mould the molten steel of inner core part, the temperature of molten steel is 1400 ~ 1520 DEG C, and the duration of pouring is 2 ~ 5 hours.
6. the manufacture method of large-scale high-carbon half steel material anticentripetal roll collar according to claim 3, is characterized in that: step B mesectoderm part casting complete is to T=t ± 30 interval time starting to pour into a mould inner core part "; Wherein t is approximate setting time.
7. the manufacture method of large-scale high-carbon half steel material anticentripetal roll collar according to claim 6, is characterized in that: approximate setting time is according to formula t=(D/2-Ds/2)
2/ K
2/ 100 calculate; In formula, t is approximate setting time; D is inner core section diameter; Ds is outer section diameter; K is coefficient, relevant with the material of foundry goods.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106011444A (en) * | 2016-08-03 | 2016-10-12 | 成都三强轧辊股份有限公司 | H-section steel roll collar heat treatment technology |
| CN106282747A (en) * | 2016-08-30 | 2017-01-04 | 江苏共昌轧辊股份有限公司 | A kind of omnipotent horizontal rich chromium cast iron collars of cast-in-block and preparation method |
| CN106884124A (en) * | 2016-12-30 | 2017-06-23 | 中钢集团邢台机械轧辊有限公司 | A kind of wear-resisting collars of centrifugal casting and preparation method |
| CN113058694A (en) * | 2021-03-19 | 2021-07-02 | 河北津西钢铁集团重工科技有限公司 | Semi-steel composite roller sleeve and preparation method thereof |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106011444A (en) * | 2016-08-03 | 2016-10-12 | 成都三强轧辊股份有限公司 | H-section steel roll collar heat treatment technology |
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| CN106884124A (en) * | 2016-12-30 | 2017-06-23 | 中钢集团邢台机械轧辊有限公司 | A kind of wear-resisting collars of centrifugal casting and preparation method |
| CN106884124B (en) * | 2016-12-30 | 2019-09-24 | 中钢集团邢台机械轧辊有限公司 | A kind of wear-resisting collars of centrifugal casting and preparation method |
| CN113058694A (en) * | 2021-03-19 | 2021-07-02 | 河北津西钢铁集团重工科技有限公司 | Semi-steel composite roller sleeve and preparation method thereof |
| CN113058694B (en) * | 2021-03-19 | 2022-10-14 | 河北津西钢铁集团重工科技有限公司 | Semi-steel composite roller sleeve and preparation method thereof |
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| CN105316577B (en) | 2018-01-05 |
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