CN106367664A - Cast iron material pinch roll used for hot strip mill and manufacturing method of cast iron material pinch roll - Google Patents
Cast iron material pinch roll used for hot strip mill and manufacturing method of cast iron material pinch roll Download PDFInfo
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- CN106367664A CN106367664A CN201610745570.2A CN201610745570A CN106367664A CN 106367664 A CN106367664 A CN 106367664A CN 201610745570 A CN201610745570 A CN 201610745570A CN 106367664 A CN106367664 A CN 106367664A
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- pinch roll
- cast iron
- hot strip
- strip mill
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C37/00—Cast-iron alloys
- C22C37/10—Cast-iron alloys containing aluminium or silicon
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C1/00—Refining of pig-iron; Cast iron
- C21C1/10—Making spheroidal graphite cast-iron
-
- 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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/26—Methods of annealing
-
- 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
- C21D5/00—Heat treatments of cast-iron
-
- 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
- C21D9/38—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for roll bodies
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/08—Making cast-iron alloys
- C22C33/10—Making cast-iron alloys including procedures for adding magnesium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C37/00—Cast-iron alloys
- C22C37/04—Cast-iron alloys containing spheroidal graphite
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C37/00—Cast-iron alloys
- C22C37/06—Cast-iron alloys containing chromium
- C22C37/08—Cast-iron alloys containing chromium with nickel
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
Abstract
The invention discloses a cast iron material pinch roll used for a hot strip mill. The pinch roll comprises alloy components including, by weight percent, 2.90%-3.60% of C, 1.30%-2.00% of Si, 0.40%-1.00% of Mn, 0. 50%-1.00% of Cr, 1.50%-2.50% of Ni, 0.30%-1.00% of Mo, smaller than or equal to 0.10% of P, smaller than or equal to 0.05% of S and the balance Fe and inevitable impurities. The invention further discloses a manufacturing method of the cast iron material pinch roll used for the hot strip mill. The manufacturing method includes the steps of smelting, inoculation and spheroidizing treatment, casting and heat treatment. The pinch roll can have the high wear resistance, the good heat crack resisting performance, the accident impact resisting capability and other comprehensive performance, and complex rolling conditions of the pinch roll before a reeling machine of the hot strip mill can be met.
Description
Technical field
The present invention relates to roll casting technical field, specifically a kind of cast iron quality pinch roll for hot strip mill and its
Manufacture method, for the pinch roll before hot strip mill crimping machine.
Background technology
Pinch roll is one of critical component on steel rolling equipment, and its Main Function is to draw the thin plate having rolled to enter
Enter coiling machine to enter volume and wind, have strip aligning, the task of leveling simultaneously concurrently.Pinch roll work when the body of roll bear moment of flexure, roller
Face contact stress be generally less than same rolling line on the roll torque of roll and contact stress, but it unlike roll continually
Change, pinch roll then just can carry out replacing only in overhaul and reface.Because roll changing time is long, it requires that pinch roll has ratio
The higher wearability of tandem rolling roll and service life.
Adopting built-up welding mode hot strip mill pinch roll at present, that is, the mode through hardfacing alloy forms the table of pinch roll more
Face is it is desirable to hardfacing alloy has high surface abrasion resistance and resistance to elevated temperatures.But built-up welding mode exists in actual application
Certain problem, the such as crack problem in weld deposit process, and not wear-resisting problem in actual use.Nowadays efficient
The rhythm of production of rate is in the urgent need to improving the life-span of pinch roll, reducing and online shut down to rushing, improve production efficiency, reduce and manufacture
Difficulty, production cost, make full use of the several respects such as the performance of material requirement the material of pinch roll is proposed more harsh
Require, need to come the direction of Improvement in terms of material.
Content of the invention
The technical problem to be solved in the invention is to provide a kind of cast iron quality pinch roll for hot strip mill and its system
Make method, make pinch roll reach the combination properties such as high-wearing feature, good heat crack resistance, anti-accident impact capacity, Neng Goushi
Answer the complicated rolling condition of pinch roll before hot strip mill coiling machine.
For solving above-mentioned technical problem, the technical solution adopted in the present invention is:
A kind of cast iron quality pinch roll for hot strip mill, the alloying component of described pinch roll and its weight percentage are c
2.90～3.60%, si 1.30～2.00%, mn 0.40～1.00%, cr 0.50～1.00%, ni 1.50～2.50%, mo
0.30～1.00%, p≤0.10%, s≤0.05%, remaining is fe and inevitable impurity.
Further improvement is that of technical solution of the present invention: the alloying component of described pinch roll and its weight percentage are
C 3.00～3.50%, si 1.50～2.00%, mn 0.50～1.00%, cr 0.50～1.00%, ni 1.60～2.40%, mo
0.50～1.00%, p≤0.10%, s≤0.05%, remaining is fe and inevitable impurity.
The invention also discloses a kind of manufacture method of the cast iron quality pinch roll for hot strip mill, described manufacture method
Including melting, breed and spheroidising, cast, heat treatment step, described step specifically,
1) melting, raw material is placed in electric induction furnace the proportioning according to alloying component and its weight percentage, is stirred using electromagnetism
Mix, melting under certain smelting temperature；
2) breed and spheroidising, ladle is previously added inovulant, pours alloying pellet with steel stream in tapping process, come out of the stove
After the completion of Argon process is carried out to ladle molten iron；
3) pour into a mould, the method using centrifugal casting is poured into a mould；
4) heat treatment, cast is made annealing treatment after terminating to unpack.
Further improvement is that of technical solution of the present invention: the smelting temperature in described step 1) is 1400 DEG C ~ 1500 DEG C.
Further improvement is that of technical solution of the present invention: described step 2) in inovulant be RE-Mg-ferrosilicon alloy,
The ratio that inovulant adds is that 1 ton of molten steel adds 5 ~ 10kg.
Further improvement is that of technical solution of the present invention: described step 2) in alloying pellet be fe-si granule, alloy
The ratio that granule adds is that 1 ton of molten steel adds 1～3kg.
Further improvement is that of technical solution of the present invention: the granularity of described alloying pellet is 10～20mm.
Further improvement is that of technical solution of the present invention: described step 2) in sample analysis after the completion of Argon gas disposal,
Confirm that alloying component and its weight percentage meet technological requirement.
Further improvement is that of technical solution of the present invention: the annealing temperature in described step 4) is 500 DEG C～600 DEG C,
Depending on roll specification, the unit of annealing time=roller diameter × 2/50, wherein annealing time is h to annealing time, roller diameter
Unit be mm.
Further improvement is that of technical solution of the present invention: the working lining hardness of described pinch roll is 63-67hsc.
Due to employing technique scheme, the technological progress that the present invention obtains is:
The pinch roll of the present invention can reach the combination properties such as high-wearing feature, good heat crack resistance, anti-accident impact capacity,
Can adapt to the complicated rolling condition of pinch roll before hot strip mill coiling machine.
Because cast iron quality contains the carbide of certain content so that its wearability and heap welder in the pinch roll of the present invention
Skill is compared to have and is greatly improved, and in addition organizing, the graphite containing certain content makes the heat crack resistance of pinch roll obtain
Ensure so that combination property is applied to the requirement of hot strip mill pinch roll.
The fusion process of the present invention adopts electric induction furnace smelting technology, and melting is to carry out in electric induction furnace, melting tonnage, molten
Refining temperature is easily grasped, and the effect of electromagnetic stirring force makes hot metal composition more uniform, and the recovery rate adding alloy is very high, can be by
Accurately carry out Composition Control according to technological design, and in molten iron, the impurity of non-conductor is easily extruded, reduce slag inclusion in roll
Generation etc. defect.
The effect that the inovulant of the present invention and alloying pellet play is to promote graphitization, improves graphite form and distribution, subtracts
Few chilling tendency simultaneously refines matrix.Sample analysis after the completion of Argon gas disposal are it is ensured that chemical composition meets technological requirement.This
The pouring type of invention adopts centrifugal casting, it is to avoid produce the defect such as loose.
The heat treatment of the present invention, using annealing, specifically adopts the cold mode of stove, go de-stress, reach suitably hard
Degree, in addition prevents that cooling rate is too fast in cooling procedure cracks.
Brief description
Fig. 1 is the photo of 200 μm of scales of metallographic structure of the pinch roll of the present invention；
Fig. 2 is the photo of 100 μm of scales of metallographic structure of the pinch roll of the present invention.
Specific embodiment
The invention discloses a kind of cast iron quality pinch roll for hot strip mill, the alloying component of pinch roll and its weight
Percentage composition is c 2.90～3.60%, si 1.30～2.00%, mn 0.40～1.00%, cr 0.50～1.00%, ni 1.50
～2.50%, mo 0.30～1.00%, p≤0.10%, s≤0.05%, remaining is fe and inevitable impurity.
The invention also discloses a kind of manufacture method of the cast iron quality pinch roll for hot strip mill, including melting, pregnant
Educate and spheroidising, cast, heat treatment step.
With reference to embodiment, the present invention is described in further details:
Embodiment 1
One of the present embodiment is used for the cast iron quality pinch roll of hot strip mill, the alloying component of the pinch roll of setting and its weight
Amount percentage composition target is c 3.15～3.25%, si 1.65～1.75%, mn 0.75～0.85%, cr 0.65～0.75%, ni
1.85～1.95%, mo 0.75～0.85%, p≤0.10%, s≤0.05%, remaining is fe and inevitable impurity.
This enforcement is by melting, breeds and the casting for hot strip mill is prepared in spheroidising, cast, heat treatment step
Iron material matter pinch roll.Each step specifically,
1) melting, raw material is placed in electric induction furnace the proportioning according to alloying component and its weight percentage, concrete input
Raw material is the pig iron, steel scrap, ferromanganese, ferrochrome, ferronickel and molybdenum-iron, using electromagnetic agitation, sets smelting temperature as 1400 DEG C ~ 1500
DEG C, start melting.
2) breed and spheroidising, ladle is previously added inovulant, RE-Mg-ferrosilicon alloy selected by inovulant, breeds
Agent is buying existing products in markets, and product meets the requirement of gb/t4138 2004 " rare earth magnesium ferrosilicon alloy ", inovulant plus
Entering amount is that 1 ton of molten steel adds 8kg.Alloying pellet is poured with steel stream, alloying pellet selects fe-si granule, fe-si in tapping process
In granule, the mass fraction of si is 75%, and the addition of alloying pellet is that 1 ton of molten steel adds 2kg, the granularity of alloying pellet is 10～
15mm.After the completion of coming out of the stove, ladle molten iron is carried out with Argon process, sample analysis after the completion of Argon gas disposal, the result of sample analysis
For: alloying component and its weight percentage are determined as c 3.2%, si 1.7%, mn 0.8%, cr 0.7%, ni 1.9%, mo
0.8%, p≤0.10%, s≤0.05%, remaining is fe and inevitable impurity.Alloying component and its weight percentage meet
Target setting, meets technological requirement.
3) pour into a mould, the method using centrifugal casting is poured into a mould；In the present embodiment, the specification of the pinch roll of cast is φ
960mm×1500mm.
4) heat treatment, cast is made annealing treatment after terminating to unpack.Annealing temperature be 500 DEG C～600 DEG C, annealing time by
Following methods calculate: the unit of annealing time=roller diameter × 2/50, wherein annealing time is h, the unit of roller diameter
For mm.Pinch roll diameter φ 960mm is substituted in above-mentioned formula, obtaining annealing time is 38.4h.
The working lining hardness of pinch roll manufactured in the present embodiment is 65hsc.
As shown in Figure 1 and Figure 2, Fig. 1 is the photo of 200 μm of scales to the photo of the metallographic structure of the pinch roll of the present embodiment, figure
2 is the photo of 100 μm of scales.
Embodiment 2
One of the present embodiment is used for the cast iron quality pinch roll of hot strip mill, the alloying component of the pinch roll of setting and its weight
Amount percentage composition target is c 3.55～3.60%, si 1.95～2.00%, mn 0.50～0.60%, cr 0.50～0.60%, ni
2.30～2.40%, mo 0.95～1.00%, p≤0.10%, s≤0.05%, remaining is fe and inevitable impurity.
This enforcement is by melting, breeds and the casting for hot strip mill is prepared in spheroidising, cast, heat treatment step
Iron material matter pinch roll.Each step specifically,
1) melting, raw material is placed in electric induction furnace the proportioning according to alloying component and its weight percentage, concrete input
Raw material is the pig iron, steel scrap, ferromanganese, ferrochrome, ferronickel and molybdenum-iron, using electromagnetic agitation, sets smelting temperature as 1400 DEG C ~ 1500
DEG C, start melting.
2) breed and spheroidising, ladle is previously added inovulant, RE-Mg-ferrosilicon alloy selected by inovulant, breeds
Agent is buying existing products in markets, and product meets the requirement of gb/t4138 2004 " rare earth magnesium ferrosilicon alloy ", inovulant plus
Entering amount is that 1 ton of molten steel adds 10kg.Alloying pellet is poured with steel stream, alloying pellet selects fe-si granule, fe- in tapping process
In si granule, the mass fraction of si is 75%, and the addition of alloying pellet is that 1 ton of molten steel adds 3kg, and the granularity of alloying pellet is 15
～20mm.After the completion of coming out of the stove, ladle molten iron is carried out with Argon process, sample analysis after the completion of Argon gas disposal, the knot of sample analysis
Fruit is: alloying component and its weight percentage are determined as c 3.60%, si 2.00%, mn 0.55%, cr 0.55%, ni
2.35%, mo 0.95%, p≤0.10%, s≤0.05%, remaining is fe and inevitable impurity.Alloying component and its weight hundred
Point content meets target setting, meets technological requirement.
3) pour into a mould, the method using centrifugal casting is poured into a mould；In the present embodiment, the specification of the pinch roll of cast is φ
550mm×1500mm.
4) heat treatment, cast is made annealing treatment after terminating to unpack.Annealing temperature be 500 DEG C～600 DEG C, annealing time by
Following methods calculate: the unit of annealing time=roller diameter × 2/50, wherein annealing time is h, the unit of roller diameter
For mm.Pinch roll diameter φ 550mm is substituted in above-mentioned formula, obtaining annealing time is 22h.
The working lining hardness of pinch roll manufactured in the present embodiment is 63hsc.
Embodiment 3
One of the present embodiment is used for the cast iron quality pinch roll of hot strip mill, the alloying component of the pinch roll of setting and its weight
Amount percentage composition target is c 3.35～3.45%, si 1.75～1.85%, mn 0.50～0.60%, cr 0.50～0.60%, ni
1.60～1.70%, mo 0.50～0.60%, p≤0.10%, s≤0.05%, remaining is fe and inevitable impurity.
This enforcement is by melting, breeds and the casting for hot strip mill is prepared in spheroidising, cast, heat treatment step
Iron material matter pinch roll.Each step specifically,
1) melting, raw material is placed in electric induction furnace the proportioning according to alloying component and its weight percentage, concrete input
Raw material is the pig iron, steel scrap, ferromanganese, ferrochrome, ferronickel and molybdenum-iron, using electromagnetic agitation, sets smelting temperature as 1400 DEG C ~ 1500
DEG C, start melting.
2) breed and spheroidising, ladle is previously added inovulant, RE-Mg-ferrosilicon alloy selected by inovulant, breeds
Agent is buying existing products in markets, and product meets the requirement of gb/t4138 2004 " rare earth magnesium ferrosilicon alloy ", inovulant plus
Entering amount is that 1 ton of molten steel adds 5kg.Alloying pellet is poured with steel stream, alloying pellet selects fe-si granule, fe-si in tapping process
In granule, the mass fraction of si is 75%, and the addition of alloying pellet is that 1 ton of molten steel adds 1kg, the granularity of alloying pellet is 15～
20mm.After the completion of coming out of the stove, ladle molten iron is carried out with Argon process, sample analysis after the completion of Argon gas disposal, the result of sample analysis
For: alloying component and its weight percentage are determined as c 3.40%, si 1.80%, mn 0.55%, cr 0.55%, ni 1.65%,
Mo 0.55%, p≤0.10%, s≤0.05%, remaining is fe and inevitable impurity..Alloying component and its weight percentage
Meet target setting, meet technological requirement.
3) pour into a mould, the method using centrifugal casting is poured into a mould；In the present embodiment, the specification of the pinch roll of cast is φ
960mm×1500mm.
4) heat treatment, cast is made annealing treatment after terminating to unpack.Annealing temperature be 500 DEG C～600 DEG C, annealing time by
Following methods calculate: the unit of annealing time=roller diameter × 2/50, wherein annealing time is h, the unit of roller diameter
For mm.Pinch roll diameter φ 960mm is substituted in above-mentioned formula, obtaining annealing time is 38.4 h.
The working lining hardness of pinch roll manufactured in the present embodiment is 67hsc.
Claims (10)
1. a kind of cast iron quality pinch roll for hot strip mill it is characterised in that: the alloying component of described pinch roll and its weight
Amount percentage composition is c 2.90～3.60%, si 1.30～2.00%, mn 0.40～1.00%, cr 0.50～1.00%, ni
1.50～2.50%, mo 0.30～1.00%, p≤0.10%, s≤0.05%, remaining is fe and inevitable impurity.
2. a kind of cast iron quality pinch roll for hot strip mill according to claim 1 it is characterised in that: described pinch
The alloying component of roller and its weight percentage are c 3.00～3.50%, si 1.50～2.00%, mn 0.50～1.00%, cr
0.50～1.00%, ni 1.60～2.40%, mo 0.50～1.00%, p≤0.10%, s≤0.05%, remaining is fe and can not keep away
The impurity exempted from.
3. a kind of manufacture method of the cast iron quality pinch roll for hot strip mill it is characterised in that: described manufacture method includes
Melting, breed and spheroidising, cast, heat treatment step, described step specifically,
1) melting, raw material is placed in electric induction furnace the proportioning according to alloying component and its weight percentage, is stirred using electromagnetism
Mix, melting under certain smelting temperature；
2) breed and spheroidising, ladle is previously added inovulant, pours alloying pellet with steel stream in tapping process, come out of the stove
After the completion of Argon process is carried out to ladle molten iron；
3) pour into a mould, the method using centrifugal casting is poured into a mould；
4) heat treatment, cast is made annealing treatment after terminating to unpack.
4. the manufacture method of a kind of cast iron quality pinch roll for hot strip mill according to claim 3, its feature exists
In: the smelting temperature in described step 1) is 1400 DEG C ~ 1500 DEG C.
5. the manufacture method of a kind of cast iron quality pinch roll for hot strip mill according to claim 3, its feature exists
In described step 2) in inovulant be RE-Mg-ferrosilicon alloy, the ratio that inovulant adds is that 1 ton of molten steel adds 5 ~ 10kg.
6. the manufacture method of a kind of cast iron quality pinch roll for hot strip mill according to claim 3, its feature exists
In described step 2) in alloying pellet be fe-si granule, the ratio that alloying pellet adds is that 1 ton of molten steel adds 1～3kg.
7. the manufacture method of a kind of cast iron quality pinch roll for hot strip mill according to claim 6, its feature exists
In: the granularity of described alloying pellet is 10～20mm.
8. the manufacture method of a kind of cast iron quality pinch roll for hot strip mill according to claim 3, its feature exists
In described step 2) in sample analysis after the completion of Argon gas disposal, confirm that alloying component and its weight percentage meet technique
Require.
9. the manufacture method of a kind of cast iron quality pinch roll for hot strip mill according to claim 3, its feature exists
Be 500 DEG C～600 DEG C in: the annealing temperature in described step 4), annealing time depending on roll specification, annealing time=roll
The unit of diameter × 2/50, wherein annealing time is h, and the unit of roller diameter is mm.
10. the manufacture method of a kind of cast iron quality pinch roll for hot strip mill according to any one of claim 3 ~ 9,
It is characterized in that: the working lining hardness of described pinch roll is 63-67hsc.
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| CN201610745570.2A CN106367664A (en) | 2016-08-29 | 2016-08-29 | Cast iron material pinch roll used for hot strip mill and manufacturing method of cast iron material pinch roll |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107794438A (en) * | 2017-10-23 | 2018-03-13 | 广东现代铸造有限公司 | Spheroidal graphite cast-iron, crankcase and high velocity ram machine lathe bed |
| CN109047341A (en) * | 2018-07-06 | 2018-12-21 | 莱芜莱钢集团金鼎轧辊有限公司 | A kind of Novel pinch roll |
| CN111101053A (en) * | 2019-12-30 | 2020-05-05 | 中钢集团邢台机械轧辊有限公司 | Working roll for wire rod rough rolling frame and manufacturing method thereof |
| CN111519089A (en) * | 2020-04-26 | 2020-08-11 | 鞍钢重型机械有限责任公司 | Improved infinite chilled alloy cast iron type steel roll casting method |
| CN113699435A (en) * | 2021-08-26 | 2021-11-26 | 中原内配集团安徽有限责任公司 | Wear-resistant high-strength cylinder sleeve and casting process thereof |
| CN113798325A (en) * | 2020-06-14 | 2021-12-17 | 上海梅山钢铁股份有限公司 | Hot coiling box pinch roll device for preventing meat sticking and control method |
| CN115505831A (en) * | 2022-11-08 | 2022-12-23 | 江苏凯达重工股份有限公司 | Large-size steel alloy ductile iron edging roll and preparation method thereof |
| CN116145020A (en) * | 2023-01-31 | 2023-05-23 | 中钢集团邢台机械轧辊有限公司 | Continuous roller for CADI seamless steel pipe and manufacturing method thereof |
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| CN107794438A (en) * | 2017-10-23 | 2018-03-13 | 广东现代铸造有限公司 | Spheroidal graphite cast-iron, crankcase and high velocity ram machine lathe bed |
| CN109047341A (en) * | 2018-07-06 | 2018-12-21 | 莱芜莱钢集团金鼎轧辊有限公司 | A kind of Novel pinch roll |
| CN111101053A (en) * | 2019-12-30 | 2020-05-05 | 中钢集团邢台机械轧辊有限公司 | Working roll for wire rod rough rolling frame and manufacturing method thereof |
| CN111519089A (en) * | 2020-04-26 | 2020-08-11 | 鞍钢重型机械有限责任公司 | Improved infinite chilled alloy cast iron type steel roll casting method |
| CN113798325A (en) * | 2020-06-14 | 2021-12-17 | 上海梅山钢铁股份有限公司 | Hot coiling box pinch roll device for preventing meat sticking and control method |
| CN113699435A (en) * | 2021-08-26 | 2021-11-26 | 中原内配集团安徽有限责任公司 | Wear-resistant high-strength cylinder sleeve and casting process thereof |
| CN115505831A (en) * | 2022-11-08 | 2022-12-23 | 江苏凯达重工股份有限公司 | Large-size steel alloy ductile iron edging roll and preparation method thereof |
| CN116145020A (en) * | 2023-01-31 | 2023-05-23 | 中钢集团邢台机械轧辊有限公司 | Continuous roller for CADI seamless steel pipe and manufacturing method thereof |
| CN116145020B (en) * | 2023-01-31 | 2024-04-05 | 中钢集团邢台机械轧辊有限公司 | Continuous roller for CADI seamless steel pipe and manufacturing method thereof |
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Application publication date: 20170201 |