CN110195190A - Novel high chrome narrowband steel supporting roll and its processing technology - Google Patents
Novel high chrome narrowband steel supporting roll and its processing technology Download PDFInfo
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- CN110195190A CN110195190A CN201910599704.8A CN201910599704A CN110195190A CN 110195190 A CN110195190 A CN 110195190A CN 201910599704 A CN201910599704 A CN 201910599704A CN 110195190 A CN110195190 A CN 110195190A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 43
- 239000010959 steel Substances 0.000 title claims abstract description 43
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 title claims abstract description 22
- 238000005516 engineering process Methods 0.000 title claims abstract description 13
- 230000007704 transition Effects 0.000 claims abstract description 22
- 238000010438 heat treatment Methods 0.000 claims abstract description 16
- 238000000034 method Methods 0.000 claims abstract description 11
- 238000000465 moulding Methods 0.000 claims abstract description 3
- 239000000126 substance Substances 0.000 claims description 32
- 238000005266 casting Methods 0.000 claims description 28
- 238000005496 tempering Methods 0.000 claims description 14
- 238000001816 cooling Methods 0.000 claims description 7
- 239000003595 mist Substances 0.000 claims description 7
- 239000007921 spray Substances 0.000 claims description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 239000007788 liquid Substances 0.000 claims description 4
- 229910001563 bainite Inorganic materials 0.000 claims description 3
- 229910000734 martensite Inorganic materials 0.000 claims description 2
- 239000004615 ingredient Substances 0.000 claims 1
- 238000009750 centrifugal casting Methods 0.000 abstract description 2
- 210000003739 neck Anatomy 0.000 description 11
- 239000012071 phase Substances 0.000 description 7
- 239000007791 liquid phase Substances 0.000 description 5
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B29/00—Counter-pressure devices acting on rolls to inhibit deflection of same under load, e.g. backing rolls ; Roll bending devices, e.g. hydraulic actuators acting on roll shaft ends
-
- 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
- C21D1/18—Hardening; Quenching with or without subsequent tempering
-
- 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
- C21D1/28—Normalising
-
- 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
- C22C37/00—Cast-iron alloys
- C22C37/06—Cast-iron alloys containing chromium
- C22C37/08—Cast-iron alloys containing chromium with nickel
-
- 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
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
-
- 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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
-
- 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
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/46—Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium
-
- 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
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/48—Ferrous alloys, e.g. steel alloys containing chromium with nickel with niobium or tantalum
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
The present invention relates to roll technology fields, more particularly to novel high chrome narrowband steel supporting roll and its processing technology, the short disadvantage of service life exists in the prior art in solution, including upper roller and lower roll, the upper roller and lower roll are symmetrical arranged, the upper roller and lower roll include roll body and roll neck, the roll neck is fixed at the both ends of the roll body, roll body and roll neck are an integral molding structure, for the wear block of ribbon steel, the problem of tiny spot in various degree is presented in surface, using centrifugal casting technique, by working lining, it is cast in terms of transition zone and core three, it is processed into through multistage heat treatment, wear-resisting property is good, reconditioning quality is small, reconditioning is often, extend the service life of narrowband steel supporting roll, Enterprise Integrated benefit is evident improve.
Description
Technical field
The present invention relates to roll technology field more particularly to novel high chrome narrowband steel supporting roll and its processing technologys.
Background technique
Demand with market to excellent special steel ribbon steel is increasing, and also gets over to the surface quality of excellent special steel ribbon steel
Come harsher.The narrowband steel supporting roll that Metallurgical Enterprise scene is seen often will appear and working roll one due to the material problem used
The strip of sample rolls the trace of quick abrasion, uses to strip working roll and brings very big influence.Simultaneously to the surface matter of ribbon steel
Amount shows different degrees of tiny spot, and the lost on sale for causing ribbon steel to roll enterprise seriously increases.Thus the present invention mentions
Novel high chrome narrowband steel supporting roll is gone out to solve the above problems.
Summary of the invention
The purpose of the present invention is to solve the novel Gao Ge for existing in the prior art the short disadvantage of service life, and proposing
Steel narrowband steel supporting roll.
To achieve the goals above, present invention employs following technical solutions:
Novel high chrome narrowband steel supporting roll, including upper roller and lower roll, the upper roller and lower roll are symmetrical arranged, and the upper roller is under
Roller includes roll body and roll neck, and the roll neck is fixed at the both ends of the roll body.
Preferably, the roll body and roll neck are an integral molding structure.
Preferably, the upper roller and lower roll, their chemical component are divided into working lining, transition zone and core three parts and set
It sets, the chemical component of the working lining is C:1.20~1.80%；Si:0.60~0.80%；Mn:0.60~0.80%；Cr:6.00
~8.00%；Ni:1.00~2.00%；Mo:2.00~4.00%；V:0.10~0.30%；Nb:0.20~0.40%；P≤0.030%；
S≤0.025%；The chemical component of the transition zone is C:1.20~1.40%；Si:0.80~1.00%；Mn:0.50~0.80%；
Cr:2.00~4.00%；Ni:0.50~1.00%；Mo:1.00~2.00%；V:0.05~0.10%；Nb:0.10~0.20%；P≤
0.030%；S≤0.025%；The chemical component of the core is C:2.90~3.20%；Si:1.80~2.50%；Mn:0.60~
0.80%；Cr:0.30~0.50%；Ni:0.30~0.50%；P≤0.030%；S≤0.025%；Mg≥0.05%.
Preferably, the working lining roll surface hardness is 65~75HSD, tensile strength >=480MPa of the roll neck.
Preferably, the basic metallographic structure of the working lining is by particulate dress carbide, bainite and martensite mixing system
At.
The processing technology of novel high chrome narrowband steel supporting roll, includes the following steps:
S1, be chemically defined: the chemical component of the working lining is C:1.20~1.80%；Si:0.60~0.80%；Mn:
0.60~0.80%；Cr:6.00~8.00%；Ni:1.00~2.00%；Mo:2.00~4.00%；V:0.10~0.30%；Nb:
0.20~0.40%；P≤0.030%；S≤0.025%；The chemical component of the transition zone is C:1.20~1.40%；Si:0.80~
1.00%；Mn:0.50~0.80%；Cr:2.00~4.00%；Ni:0.50~1.00%；Mo:1.00~2.00%；V:0.05~
0.10%；Nb:0.10~0.20%；P≤0.030%；S≤0.025%；The chemical component of the core is C:2.90~3.20%；
Si:1.80~2.50%；Mn:0.60~0.80%；Cr:0.30~0.50%；Ni:0.30~0.50%；P≤0.030%；S≤
0.025%；Mg≥0.05%；
S2, casting: by pouring molten steel to roll casting mold, wherein pouring temperature is controlled, the working lining pouring temperature: liquid
+ 60 DEG C of phase temperature~80 DEG C, the transition zone pouring temperature :+40 DEG C of liquidus temperature~60 DEG C, the core pouring temperature: liquid
+ 80 DEG C of phase temperature~100 DEG C obtain roll casting after cooling；
S3, heat treatment process: roll casting obtained in S2 step is fitted into progress normalizing heating, first stage in normalizing furnace
It heats up 8 DEG C per hour, when roller temperature is to 660 DEG C, keeps the temperature 4 hours, second stage heats up 10 DEG C per hour, when roller temperature is to 820 DEG C, protects
Temperature 6 hours, the phase III heats up 12 DEG C per hour, when roller temperature is to 980 DEG C, keeps the temperature 4 hours, roll is then hung out carry out water mist
Spray is quenched, and roller temperature carries out tempering until roller temperature reaches 550 DEG C to placing into after 430 DEG C~450 DEG C in tempering furnace；
S4, it is furnace-cooled to after room temperature to come out of the stove and carries out turnery processing.
The beneficial effects of the present invention are: the novel high chrome narrowband steel supporting roll proposed in the present invention, for ribbon steel
The problem of tiny spot in various degree is presented in wear block, surface, using centrifugal casting technique, by working lining, transition zone and core
Cast in terms of portion three, be processed into through multistage heat treatment, wear-resisting property is good, reconditioning quality is small, reconditioning often, extend ribbon steel
The service life of backing roll, Enterprise Integrated benefit is evident improve.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of novel high chrome narrowband steel supporting roll proposed by the present invention.
In figure: 1 upper roller, 2 lower rolls, 3 roll bodies, 4 roll necks.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.
Referring to Fig.1, novel high chrome narrowband steel supporting roll, including upper roller 1 and lower roll 2, the upper roller 1 and lower roll 2 are symmetrical
Setting, upper roller 1 and lower roll 2 include roll body 3 and roll neck 4, and roll neck 4 is fixed at the both ends of roll body 3, and roll body 3 and roll neck 4 are
Integrated formed structure, upper roller 1 and lower roll 2, their chemical component are divided into working lining, transition zone and the setting of core three parts, work
The chemical component for making layer is C:1.20~1.80%；Si:0.60~0.80%；Mn:0.60~0.80%；Cr:6.00~8.00%；
Ni:1.00~2.00%；Mo:2.00~4.00%；V:0.10~0.30%；Nb:0.20~0.40%；P≤0.030%；S≤
0.025%；The chemical component of transition zone is C:1.20~1.40%；Si:0.80~1.00%；Mn:0.50~0.80%；Cr:2.00
~4.00%；Ni:0.50~1.00%；Mo:1.00~2.00%；V:0.05~0.10%；Nb:0.10~0.20%；P≤0.030%；
S≤0.025%；The chemical component of core is C:2.90~3.20%；Si:1.80~2.50%；Mn:0.60~0.80%；Cr:0.30
~0.50%；Ni:0.30~0.50%；P≤0.030%；S≤0.025%；Mg >=0.05%, working lining roll surface hardness be 65~
75HSD, tensile strength >=480MPa of roll neck 4, the basic metallographic structure of working lining is by particulate dress carbide, bainite and horse
Family name's body is mixed.
The processing technology of novel high chrome narrowband steel supporting roll, includes the following steps:
S1, be chemically defined: the chemical component of working lining is C:1.20~1.80%；Si:0.60~0.80%；Mn:0.60~
0.80%；Cr:6.00~8.00%；Ni:1.00~2.00%；Mo:2.00~4.00%；V:0.10~0.30%；Nb:0.20~
0.40%；P≤0.030%；S≤0.025%；The chemical component of transition zone is C:1.20~1.40%；Si:0.80~1.00%；Mn:
0.50~0.80%；Cr:2.00~4.00%；Ni:0.50~1.00%；Mo:1.00~2.00%；V:0.05~0.10%；Nb:
0.10~0.20%；P≤0.030%；S≤0.025%；The chemical component of core is C:2.90~3.20%；Si:1.80~2.50%；
Mn:0.60~0.80%；Cr:0.30~0.50%；Ni:0.30~0.50%；P≤0.030%；S≤0.025%；Mg≥0.05%；
S2, casting: by pouring molten steel to roll casting mold, wherein pouring temperature is controlled, working lining pouring temperature: liquid phase temperature
+ 60 DEG C~80 DEG C of degree, transition zone pouring temperature :+40 DEG C of liquidus temperature~60 DEG C, core pouring temperature :+80 DEG C of liquidus temperature~
100 DEG C, roll casting is obtained after cooling；
S3, heat treatment process: roll casting obtained in S2 step is fitted into progress normalizing heating, first stage in normalizing furnace
It heats up 8 DEG C per hour, when roller temperature is to 660 DEG C, keeps the temperature 4 hours, second stage heats up 10 DEG C per hour, when roller temperature is to 820 DEG C, protects
Temperature 6 hours, the phase III heats up 12 DEG C per hour, when roller temperature is to 980 DEG C, keeps the temperature 4 hours, roll is then hung out carry out water mist
Spray is quenched, and roller temperature carries out tempering until roller temperature reaches 550 DEG C to placing into after 430 DEG C~450 DEG C in tempering furnace；
S4, it is furnace-cooled to after room temperature to come out of the stove and carries out turnery processing.
Embodiment one, the processing technology of novel high chrome narrowband steel supporting roll, includes the following steps:
S1, be chemically defined: the chemical component of working lining is C:1.20%；Si:0.60%；Mn:0.60%；Cr:6.00%；Ni:
1.00%；Mo:2.00%；V:0.10%；Nb:0.20%；P:0.010%；S:0.010%；The chemical component of transition zone is C:1.20%；
Si:0.80%；Mn:0.50%；Cr:2.00%；Ni:0.50%；Mo:1.00%；V:0.05%；Nb:0.10%；P:0.010%；S:
0.010%；The chemical component of core is C:2.90%；Si:1.80%；Mn:0.60%；Cr:0.30%；Ni:0.30%；P:0.010%；
S:0.015%；Mg:0.05%；
S2, casting: by pouring molten steel to roll casting mold, wherein pouring temperature is controlled, working lining pouring temperature: liquid phase temperature
Transition zone pouring temperature :+60 DEG C of degree+40 DEG C of liquidus temperature, core pouring temperature :+80 DEG C of liquidus temperature, is rolled after cooling
Roller casting；
S3, heat treatment process: roll casting obtained in S2 step is fitted into progress normalizing heating, first stage in normalizing furnace
It heats up 8 DEG C per hour, when roller temperature is to 660 DEG C, keeps the temperature 4 hours, second stage heats up 10 DEG C per hour, when roller temperature is to 820 DEG C, protects
Temperature 6 hours, the phase III heats up 12 DEG C per hour, when roller temperature is to 980 DEG C, keeps the temperature 4 hours, roll is then hung out carry out water mist
Spray is quenched, and roller temperature carries out tempering until roller temperature reaches 550 DEG C to placing into after 430 DEG C in tempering furnace；
S4, it is furnace-cooled to after room temperature to come out of the stove and carries out turnery processing and obtain finished product one.
Embodiment two, the processing technology of novel high chrome narrowband steel supporting roll, includes the following steps:
S1, be chemically defined: the chemical component of working lining is C:1.30%；Si:0.70%；Mn:0.70%；Cr:7.00%；Ni:
1.50%；Mo:3.00%；V:0.20%；Nb:0.30%；P:0.020%；S:0.020%；The chemical component of transition zone is C:1.30%；
Si:0.90%；Mn:0.60%；Cr:3.00%；Ni:0.70%；Mo:1.50%；V:0.08%；Nb:0.15%；P:0.020%；S:
0.020%；The chemical component of core is C:3.10%；Si:2.30%；Mn:0.70%；Cr:0.40%；Ni:0.40%；P:0.020%；
S:0.020%；Mg:0.10%；
S2, casting: by pouring molten steel to roll casting mold, wherein pouring temperature is controlled, working lining pouring temperature: liquid phase temperature
Transition zone pouring temperature :+70 DEG C of degree+50 DEG C of liquidus temperature, core pouring temperature :+90 DEG C of liquidus temperature, is rolled after cooling
Roller casting；
S3, heat treatment process: roll casting obtained in S2 step is fitted into progress normalizing heating, first stage in normalizing furnace
It heats up 8 DEG C per hour, when roller temperature is to 660 DEG C, keeps the temperature 4 hours, second stage heats up 10 DEG C per hour, when roller temperature is to 820 DEG C, protects
Temperature 6 hours, the phase III heats up 12 DEG C per hour, when roller temperature is to 980 DEG C, keeps the temperature 4 hours, roll is then hung out carry out water mist
Spray is quenched, and roller temperature carries out tempering until roller temperature reaches 550 DEG C to placing into after 440 DEG C in tempering furnace；
S4, it is furnace-cooled to after room temperature to come out of the stove and carries out turnery processing and obtain finished product two.
Embodiment three, the processing technology of novel high chrome narrowband steel supporting roll, includes the following steps:
S1, be chemically defined: the chemical component of working lining is C:1.80%；Si:0.80%；Mn:0.80%；Cr:8.00%；Ni:
2.00%；Mo:4.00%；V:0.30%；Nb:0.40%；P:0.030%；S:0.025%；The chemical component of transition zone is C:1.40%；
Si:1.00%；Mn:0.80%；Cr:4.00%；Ni:1.00%；Mo:2.20%；V:0.10%；Nb:0.20%；P:0.030%；S:
0.025%；The chemical component of core is C:3.20%；Si:2.50%；Mn:0.80%；Cr:0.50%；Ni:0.50%；P:0.030%；
S:0.025%；Mg:0.15%；
S2, casting: by pouring molten steel to roll casting mold, wherein pouring temperature is controlled, working lining pouring temperature: liquid phase temperature
+ 80 DEG C of degree；Transition zone pouring temperature: it+60 DEG C of liquidus temperature, core pouring temperature :+100 DEG C of liquidus temperature, is rolled after cooling
Roller casting；
S3, heat treatment process: roll casting obtained in S2 step is fitted into progress normalizing heating, first stage in normalizing furnace
It heats up 8 DEG C per hour, when roller temperature is to 660 DEG C, keeps the temperature 4 hours, second stage heats up 10 DEG C per hour, when roller temperature is to 820 DEG C, protects
Temperature 6 hours, the phase III heats up 12 DEG C per hour, when roller temperature is to 980 DEG C, keeps the temperature 4 hours, roll is then hung out carry out water mist
Spray is quenched, and roller temperature carries out tempering until roller temperature reaches 550 DEG C to placing into after 450 DEG C in tempering furnace；
S4, it is furnace-cooled to after room temperature to come out of the stove and carries out turnery processing and obtain finished product three.
Comparative example, the processing technology of novel high chrome narrowband steel supporting roll, includes the following steps:
S1, be chemically defined: the chemical component of working lining is C:1.30%；Si:0.70%；Mn:0.70%；Cr:7.00%；Ni:
1.50%；Mo:3.00%；V:0.20%；Nb:0.30%；P:0.020%；S:0.020%；The chemical component of transition zone is C:1.30%；
Si:0.90%；Mn:0.60%；Cr:3.00%；Ni:0.70%；Mo:1.50%；V:0.08%；Nb:0.15%；P:0.020%；S:
0.020%；The chemical component of core is C:3.10%；Si:2.30%；Mn:0.70%；Cr:0.40%；Ni:0.40%；P:0.020%；
S:0.020%；Mg:0.10%；
S2, casting: by pouring molten steel to roll casting mold, wherein pouring temperature is controlled, working lining pouring temperature: liquid phase temperature
Transition zone pouring temperature :+70 DEG C of degree+50 DEG C of liquidus temperature, core pouring temperature :+90 DEG C of liquidus temperature, is rolled after cooling
Roller casting；
S3, heat treatment process: roll casting obtained in S2 step is fitted into progress normalizing heating in normalizing furnace, roller temperature is extremely
At 980 DEG C, 4 hours are kept the temperature, then roll is hung out and carries out water mist spray and quenches, roller temperature is carried out to placing into tempering furnace after 440 DEG C
Tempering reaches 550 DEG C until roller temperature；
S4, it is furnace-cooled to after room temperature to come out of the stove and carries out turnery processing and obtain finished product four.
Above-mentioned four kinds of finished products are tested, testing result is as follows:
| Finished product one | Finished product two | Finished product three | Finished product four | |
| Working lining hardness (HSD) | 66 | 69 | 74 | 53 |
| Roll neck tensile strength (MPa) | 484 | 486 | 488 | 435 |
Above-mentioned testing result result it is recognised that the working lining of novel high chrome narrowband steel supporting roll made of the present invention
Roll surface hardness and roll neck tensile strength are all higher, extend the service life of narrowband steel supporting roll, make the comprehensive benefit of enterprise
It significantly improves.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Anyone skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its
Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (6)
1. novel high chrome narrowband steel supporting roll, including upper roller (1) and lower roll (2), which is characterized in that the upper roller (1) is under
Roller (2) is symmetrical arranged, and the upper roller (1) and lower roll (2) include roll body (3) and roll neck (4), roll neck (4) fixed setting
At the both ends of the roll body (3).
2. novel high chrome narrowband steel supporting roll according to claim 1, which is characterized in that the roll body (3) and roll neck
(4) it is an integral molding structure.
3. novel high chrome narrowband steel supporting roll according to claim 1, which is characterized in that the upper roller (1) and lower roll
(2), their chemical component is divided into working lining, transition zone and the setting of core three parts, and the chemical component of the working lining is C:
1.20~1.80%；Si:0.60~0.80%；Mn:0.60~0.80%；Cr:6.00~8.00%；Ni:1.00~2.00%；Mo:
2.00~4.00%；V:0.10~0.30%；Nb:0.20~0.40%；P≤0.030%；S≤0.025%；The chemistry of the transition zone
Ingredient is C:1.20~1.40%；Si:0.80~1.00%；Mn:0.50~0.80%；Cr:2.00~4.00%；Ni:0.50~
1.00%；Mo:1.00~2.00%；V:0.05~0.10%；Nb:0.10~0.20%；P≤0.030%；S≤0.025%；The core
The chemical component in portion is C:2.90~3.20%；Si:1.80~2.50%；Mn:0.60~0.80%；Cr:0.30~0.50%；Ni:
0.30~0.50%；P≤0.030%；S≤0.025%；Mg≥0.05%.
4. novel high chrome narrowband steel supporting roll according to claim 3, which is characterized in that the working lining roll surface hardness
For 65~75HSD, tensile strength >=480MPa of the roll neck (4).
5. novel high chrome narrowband steel supporting roll according to claim 3, which is characterized in that the foundation fund of the working lining
Phase constitution is mixed by particulate dress carbide, bainite and martensite.
6. the processing technology of novel high chrome narrowband steel supporting roll according to claim 1, which is characterized in that including as follows
Step:
S1, be chemically defined: the chemical component of the working lining is C:1.20~1.80%；Si:0.60~0.80%；Mn:
0.60~0.80%；Cr:6.00~8.00%；Ni:1.00~2.00%；Mo:2.00~4.00%；V:0.10~0.30%；Nb:
0.20~0.40%；P≤0.030%；S≤0.025%；The chemical component of the transition zone is C:1.20~1.40%；Si:0.80~
1.00%；Mn:0.50~0.80%；Cr:2.00~4.00%；Ni:0.50~1.00%；Mo:1.00~2.00%；V:0.05~
0.10%；Nb:0.10~0.20%；P≤0.030%；S≤0.025%；The chemical component of the core is C:2.90~3.20%；
Si:1.80~2.50%；Mn:0.60~0.80%；Cr:0.30~0.50%；Ni:0.30~0.50%；P≤0.030%；S≤
0.025%；Mg≥0.05%；
S2, casting: by pouring molten steel to roll casting mold, wherein pouring temperature is controlled, the working lining pouring temperature: liquid
+ 60 DEG C of phase temperature~80 DEG C, the transition zone pouring temperature :+40 DEG C of liquidus temperature~60 DEG C, the core pouring temperature: liquid
+ 80 DEG C of phase temperature~100 DEG C obtain roll casting after cooling；
S3, heat treatment process: roll casting obtained in S2 step is fitted into progress normalizing heating, first stage in normalizing furnace
It heats up 8 DEG C per hour, when roller temperature is to 660 DEG C, keeps the temperature 4 hours, second stage heats up 10 DEG C per hour, when roller temperature is to 820 DEG C, protects
Temperature 6 hours, the phase III heats up 12 DEG C per hour, when roller temperature is to 980 DEG C, keeps the temperature 4 hours, roll is then hung out carry out water mist
Spray is quenched, and roller temperature carries out tempering until roller temperature reaches 550 DEG C to placing into after 430 DEG C~450 DEG C in tempering furnace；
S4, it is furnace-cooled to after room temperature to come out of the stove and carries out turnery processing.
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| CN104561817A (en) * | 2013-10-10 | 2015-04-29 | 常州凯达重工科技有限公司 | High-chromium-steel supporting roller and preparing method thereof |
| CN106884126A (en) * | 2016-12-30 | 2017-06-23 | 中钢集团邢台机械轧辊有限公司 | A kind of high chromium steel roller and its manufacture method |
| CN108144965A (en) * | 2018-01-04 | 2018-06-12 | 湖州中杭轧辊有限公司 | A kind of roll and production technology suitable for cross-wedge-rolling shaft part |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104561817A (en) * | 2013-10-10 | 2015-04-29 | 常州凯达重工科技有限公司 | High-chromium-steel supporting roller and preparing method thereof |
| CN106884126A (en) * | 2016-12-30 | 2017-06-23 | 中钢集团邢台机械轧辊有限公司 | A kind of high chromium steel roller and its manufacture method |
| CN108144965A (en) * | 2018-01-04 | 2018-06-12 | 湖州中杭轧辊有限公司 | A kind of roll and production technology suitable for cross-wedge-rolling shaft part |
| CN108179349A (en) * | 2018-01-04 | 2018-06-19 | 湖州中杭轧辊有限公司 | A kind of novel spheroidal graphite cast-iron deformed steel polishing roll and its production technology |
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Application publication date: 20190903 |