CN105369139B - The rollcogging-roll and its manufacture method of a kind of specific alloy half steel material - Google Patents
The rollcogging-roll and its manufacture method of a kind of specific alloy half steel material Download PDFInfo
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- CN105369139B CN105369139B CN201510686925.0A CN201510686925A CN105369139B CN 105369139 B CN105369139 B CN 105369139B CN 201510686925 A CN201510686925 A CN 201510686925A CN 105369139 B CN105369139 B CN 105369139B
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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
- C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
-
- 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
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/004—Heat treatment of ferrous alloys containing Cr and Ni
-
- 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
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/005—Heat treatment of ferrous alloys containing Mn
-
- 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
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/008—Heat treatment of ferrous alloys containing Si
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
-
- 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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Heat Treatment Of Articles (AREA)
- Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
Abstract
The invention discloses a kind of rollcogging-roll of specific alloy half steel material and its manufacture method, the chemical constituent and weight percentage belonged in roll manufacture field, its material is：C：0.80~1.30%, Si：0.30~0.70%, Mn：0.70~1.30%, P≤0.03%, S≤0.03%, Cr：0.80~2.50%, Ni：0.50~1.50%, Mo：0.40~1.00%, remaining is Fe and inevitable impurity.Rollcogging-roll manufacture method includes arc melting, and external refining carries out moulding by casting after refining using bottom running, and steel billet is made annealing treatment after unpacking, steel billet is machined, and normalizing+temper is carried out to the rollcogging-roll of machining shaping.The present invention makes rollcogging-roll possess high intensity, good heat crack resistance and the combination property such as wearability and soft drop, can adapt to the complicated rolling condition of shaped steel girder and rail mill cogging frame.
Description
Technical field
It is omnipotent for shaped steel-beam-and-rail the present invention relates to a kind of rollcogging-roll of specific alloy half steel material and its manufacture method
The cogging frame of milling train.
Background technology
The cogging frame rolling temperature of shaped steel-beam-and-rail universal mill is high, draught pressure is big, it is desirable to which roll has good resist
Hot tearing performance and higher intensity.To ensure the surface quality and dimensional accuracy of stocking, it is desirable to which roll has certain wearability.
Additionally, due to sectional shape it is typically more complicated, very uneven, the temperature at each position of shaped steel, deflection are deformed in the operation of rolling
Temperature stress, the roll-force that difference causes each position of roll to be born differ greatly.Therefore, to realize uniform wear, it is desirable to roll
There is approximate hardness in body surface and pass bottom.
Because alloy cast steel has certain intensity and toughness concurrently, domestic shaped steel-beam-and-rail universal mill cogging frame is typically used
Alloy cast steel material, but due to the particularity of rolling of sectional iron, the local not wear-resisting phenomenon of alloy cast steel roll can be caused.And tradition half
Steel matter is because carbon content is high, intensity is not enough, easily causes the generation of the serious accidents such as roll breakage.Therefore, shaped steel-beam-and-rail universal mill
Rollcogging-roll should have the combination properties such as high intensity, good heat crack resistance, wearability and soft drop.
The content of the invention
The technical problem to be solved in the invention is to provide rollcogging-roll and its manufacturer of a kind of specific alloy half steel material
Method, makes rollcogging-roll possess high intensity, good heat crack resistance and the combination property such as wearability and soft drop, can adapt to
The complicated rolling condition of shaped steel-girder and rail mill cogging frame.
In order to solve the above technical problems, the technical solution adopted in the present invention is：
Chemical constituent and weight percentage in a kind of rollcogging-roll of specific alloy half steel material, its material are：C：
0.80~1.30%, Si：0.30~0.70%, Mn：0.70~1.30%, P≤0.03%, S≤0.03%, Cr：0.80~2.50%,
Ni：0.50~1.50%, Mo：0.40~1.00%, remaining is Fe and inevitable impurity.
Technical solution of the present invention further improvement is that：A kind of rollcogging-roll manufacture method of specific alloy half steel material,
Comprise the following steps：
A, raw material are put into electric arc furnaces use the preliminary melting of oxidizing process, the preliminary melting of electric arc furnaces enters after terminating to liquation
Row external refining；
B, refining carry out moulding by casting after terminating using bottom running；
C, steel billet are made annealing treatment after unpacking, and annealing temperature is 700 DEG C~800 DEG C；
D, steel billet is machined；
E, the rollcogging-roll to machining shaping carry out normalizing+temper.
Technical solution of the present invention further improvement is that：The heat of oxidation during the step A oxidizing process is smelted uses oxidation
Reaction completes the gas and non-metallic inclusion in de- P, de- S and removal metal, and reduction period takes diffusive deoxidation method to remove molten steel
In oxygen.
Technical solution of the present invention further improvement is that：Electricity is carried out to rising head part after casting complete in the step C
Heating.
Technical solution of the present invention further improvement is that：Normalizing+temper is specially in the step E：It is first split
Base roller carries out normalized treatment, and normalizing temperature is 900 DEG C~980 DEG C, and the normalizing type of cooling uses the type of cooling of air-cooled+air cooling,
When roll is cooled to 450~500 DEG C, stop cooling, carry out temper, temperature is 550 DEG C~600 DEG C.
By adopting the above-described technical solution, the technological progress that the present invention is obtained is：
Because the carbon content in specific alloy half steel is between alloy cast steel and traditional half steel so that rollcogging-roll it is strong
Degree, the more traditional half steel of heat crack resistance increase, and wearability makes moderate progress than alloy cast steel material, the combination property of rollcogging-roll
The complicated rolling condition of shaped steel-girder and rail mill cogging frame can be applied to.
Fusion process improves Smelting Effect so that the quality of molten steel using the technique of melting+external refining in arc furnace
Than using the higher of general electric arc furnace smelting, reducing the generation of the defect such as slag inclusion in rollcogging-roll.
Poured into a mould, rising head part is electrically heated using bottom running after casting complete, prevent shrinkage cavity in rollcogging-roll
Produce.
The mode of air-cooled+air cooling is taken the normalizing cooling in the rollcogging-roll heat treatment of machining shaping, it is ensured that reach
Suitable hardness, can avoid cooling rate is too fast from cracking again, improve the quality of rollcogging-roll.
Brief description of the drawings
Fig. 1 is the metallographic structure photo of the rollcogging-roll of the present invention.
Embodiment
The present invention is described in further details with reference to embodiment：
Chemical constituent and weight percentage in a kind of rollcogging-roll of specific alloy half steel material, rollcogging-roll material are：
C：0.80~1.30%, Si：0.30~0.70%, Mn：0.70~1.30%, P≤0.03%, S≤0.03%, Cr：0.80~2.50%,
Ni：0.50~1.50%, Mo：0.40~1.00%, remaining is Fe and inevitable impurity.Due to the carbon in specific alloy half steel
Content is between alloy cast steel and traditional half steel so that the more traditional half steel of the intensity of rollcogging-roll, heat crack resistance increases,
Wearability makes moderate progress than alloy cast steel material, and the combination property of rollcogging-roll can be applied to shaped steel-girder and rail mill cogging frame
Complicated rolling condition.
The rollcogging-roll manufacture method comprises the following steps：
A, raw material are put into electric arc furnaces use the preliminary melting of oxidizing process, the preliminary melting of electric arc furnaces enters after terminating to liquation
Row external refining；
Raw material are matched by the content proportioning of each chemical constituent of design object and are put into electric arc furnaces to enter using oxidizing process
Row melting, smelting temperature is 1500 DEG C~1600 DEG C, and programming rate is 50 DEG C/h, and the heat of oxidation of melting is completed using oxidation reaction
Gas and non-metallic inclusion in de- P, de- S and removal metal, reduction period take diffusive deoxidation method to remove the oxygen in molten steel.Electricity
After the preliminary melting of arc stove terminates, external refining is carried out, quality of molten steel is improved.
Fusion process improves Smelting Effect so that the quality of molten steel using the technique of melting+external refining in arc furnace
Than using the higher of general electric arc furnace smelting, reducing the generation of the defect such as slag inclusion in rollcogging-roll.
B, refining carry out moulding by casting after terminating using bottom running；
Casting process is poured into a mould using mould assembling bottom running, molten steel is produced rotation during cast, during field trash is converged in
The heart simultaneously takes rising head position to as molten steel rises, and obtains roller blank.Rising head part is electrically heated after casting complete, prevented
Only in rollcogging-roll shrinkage cavity generation.
C, steel billet are made annealing treatment after unpacking, and annealing temperature is 700 DEG C~800 DEG C；
D, steel billet is machined；
E, the rollcogging-roll to machining shaping carry out normalizing+temper；
Normalizing temperature is 900 DEG C~980 DEG C, and the normalizing type of cooling uses blowing+air cooling type of cooling, it is ensured that it is suitable to reach
Hardness, can avoid cooling rate is too fast from cracking again, improve rollcogging-roll quality.When roll is cooled to 500 DEG C, stop cold
But, temper is carried out, temperature is 550 DEG C~600 DEG C, and basis of time roll specification is determined.
After above-mentioned processing, the working lining hardness of rollcogging-roll is 46~49HSD, and metallographic structure is as shown in figure 1, rollcogging-roll roller
The tensile strength of neck is 930~955MPa.
Embodiment 1
Chemical constituent and weight percentage in rollcogging-roll material are：C：0.80%, Si：0.30%, Mn：0.70%, P：
0.01%, S：0.0:1%, Cr：0.80%, Ni：0.50%, Mo：0.40%, remaining is Fe and inevitable impurity.
The rollcogging-roll manufacture method comprises the following steps：
A, raw material are put into electric arc furnaces use the preliminary melting of oxidizing process, the preliminary melting of electric arc furnaces enters after terminating to liquation
Row external refining；
Raw material are matched by the content proportioning of each chemical constituent of design object and are put into electric arc furnaces to enter using oxidizing process
Row melting, smelting temperature is 1500 DEG C DEG C, and programming rate is 50 DEG C/h.
B, refining carry out moulding by casting after terminating using bottom running；
Casting process is poured into a mould using mould assembling bottom running, and rising head part is electrically heated after casting complete.
C, steel billet are made annealing treatment after unpacking, and annealing temperature is 700 DEG C DEG C；
D, steel billet is machined；
E, the rollcogging-roll to machining shaping carry out normalizing+temper；
Normalizing temperature is 900 DEG C DEG C, and the normalizing type of cooling uses blowing+air cooling type of cooling.When roll is cooled to 500 DEG C
When, stop cooling, carry out temper, temperature is 550 DEG C.
After above-mentioned processing, the working lining hardness of rollcogging-roll is 46HSD, and the tensile strength of rollcogging-roll roll neck is 930MPa.
Embodiment 2
Chemical constituent and weight percentage in a kind of rollcogging-roll of specific alloy half steel material, rollcogging-roll material are：
C：1.00%, Si：0.50%, Mn：1.00%, P：0.02%, S：0.02%, Cr：1.50%, Ni：1.00%, Mo：0.70%, remaining is
Fe and inevitable impurity.
The rollcogging-roll manufacture method comprises the following steps：
A, raw material are put into electric arc furnaces use the preliminary melting of oxidizing process, the preliminary melting of electric arc furnaces enters after terminating to liquation
Row external refining；
Raw material are matched by the content proportioning of each chemical constituent of design object and are put into electric arc furnaces to enter using oxidizing process
Row melting, smelting temperature is 1550 DEG C, and programming rate is 50 DEG C/h.
B, refining carry out moulding by casting after terminating using bottom running；
Casting process is poured into a mould using mould assembling bottom running, and rising head part is electrically heated after casting complete.
C, steel billet are made annealing treatment after unpacking, and annealing temperature is 750 DEG C；
D, steel billet is machined；
E, the rollcogging-roll to machining shaping carry out normalizing+temper；
Normalizing temperature is 950 DEG C, and the normalizing type of cooling uses blowing+air cooling type of cooling, when roll is cooled to 500 DEG C
When, stop cooling, carry out temper, temperature is 570 DEG C.
After above-mentioned processing, the working lining hardness of rollcogging-roll is 47HSD, and the tensile strength of rollcogging-roll roll neck is 942MPa.
Embodiment 3
Chemical constituent and weight percentage in rollcogging-roll material are：C：1.30%, Si：0.70%, Mn：1.30%, P：
0.03%, S：0.03%, Cr：2.50%, Ni：1.50%, Mo：1.00%, remaining is Fe and inevitable impurity.
The rollcogging-roll manufacture method comprises the following steps：
A, raw material are put into electric arc furnaces use the preliminary melting of oxidizing process, the preliminary melting of electric arc furnaces enters after terminating to liquation
Row external refining；
Raw material are matched by the content proportioning of each chemical constituent of design object and are put into electric arc furnaces to enter using oxidizing process
Row melting, smelting temperature is 1600 DEG C, and programming rate is 50 DEG C/h.
B, refining carry out moulding by casting after terminating using bottom running；
Casting process is poured into a mould using mould assembling bottom running, and rising head part is electrically heated after casting complete.
C, steel billet are made annealing treatment after unpacking, and annealing temperature is 800 DEG C；
D, steel billet is machined；
E, the rollcogging-roll to machining shaping carry out normalizing+temper；
Normalizing temperature is 980 DEG C, and the normalizing type of cooling uses blowing+air cooling type of cooling, when roll is cooled to 500 DEG C
When, stop cooling, carry out temper, temperature is 600 DEG C.
After above-mentioned processing, the working lining hardness of rollcogging-roll is 49HSD, and the tensile strength of rollcogging-roll roll neck is 955MPa.
Claims (3)
1. a kind of rollcogging-roll manufacture method of specific alloy half steel material, it is characterised in that：
The rollcogging-roll of specific alloy half steel material, its chemical constituent and weight percentage are：C：0.80~1.00%, Si：0.30
~0.70%, Mn：0.70~1.30%, P≤0.03%, S≤0.03%, Cr：1.50~2.50%, Ni：0.50~1.50%, Mo：
0.70~1.00%, remaining is Fe and inevitable impurity；
Comprise the following steps：
A, by raw material be put into electric arc furnaces use the preliminary melting of oxidizing process, the preliminary melting of electric arc furnaces terminate after to liquation carry out stove
Outer refining；
B, refining carry out moulding by casting after terminating using bottom running；
C, steel billet are made annealing treatment after unpacking, and annealing temperature is 700 DEG C~800 DEG C；
D, steel billet is machined；
E, the rollcogging-roll to machining shaping carry out normalizing+temper；
Normalizing+temper is specially in the step E：First to rollcogging-roll carry out normalized treatment, normalizing temperature be 900 DEG C~
980 DEG C, the normalizing type of cooling uses the type of cooling of air-cooled+air cooling, when roll is cooled to 450~500 DEG C, stops cooling,
Temper is carried out, temperature is 550 DEG C~600 DEG C；
The tensile strength of rollcogging-roll roll neck is 930~955MPa.
2. a kind of rollcogging-roll manufacture method of specific alloy half steel material according to claim 1, it is characterised in that：It is described
The heat of oxidation during step A oxidizing process is smelted completes de- P using oxidation reaction, takes off S and removes the gas and nonmetallic folder in metal
Debris, reduction period takes diffusive deoxidation method to remove the oxygen in molten steel.
3. a kind of rollcogging-roll manufacture method of specific alloy half steel material according to claim 1, it is characterised in that：It is described
Rising head part is electrically heated after casting complete in step B.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510686925.0A CN105369139B (en) | 2015-10-22 | 2015-10-22 | The rollcogging-roll and its manufacture method of a kind of specific alloy half steel material |
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| CN201510686925.0A CN105369139B (en) | 2015-10-22 | 2015-10-22 | The rollcogging-roll and its manufacture method of a kind of specific alloy half steel material |
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| CN105369139B true CN105369139B (en) | 2017-09-29 |
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| CN106884123A (en) * | 2016-12-29 | 2017-06-23 | 中钢集团邢台机械轧辊有限公司 | Universal mill alloy cast steel material BD rolls and its manufacture method |
| CN107326167A (en) * | 2017-06-19 | 2017-11-07 | 太仓市钧胜轧辊有限公司 | A kind of processing technology of roll for cold rolling |
| CN112680586A (en) * | 2020-12-14 | 2021-04-20 | 成都三强轧辊股份有限公司 | Heat treatment method of large roller and product thereof |
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| CN1080329A (en) * | 1992-06-13 | 1994-01-05 | 首钢总公司 | The tilting roller cover and the manufacture method thereof of half steel material |
| CN103334060A (en) * | 2013-07-18 | 2013-10-02 | 邢台精诚轧辊有限公司 | Graphite tool steel used for metal calendaring and manufacturing method of graphite tool steel |
| CN103469109B (en) * | 2013-09-16 | 2015-10-28 | 中钢集团邢台机械轧辊有限公司 | A kind of shaping roll of graphitized steel material and manufacture method thereof |
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