CN109898021A - A kind of compound high-vanadium high-speed steel roller set of hot rolling bimetallic - Google Patents
A kind of compound high-vanadium high-speed steel roller set of hot rolling bimetallic Download PDFInfo
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- CN109898021A CN109898021A CN201910255421.1A CN201910255421A CN109898021A CN 109898021 A CN109898021 A CN 109898021A CN 201910255421 A CN201910255421 A CN 201910255421A CN 109898021 A CN109898021 A CN 109898021A
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- roller set
- speed steel
- vanadium
- bimetallic
- hot rolling
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Abstract
The present invention provides a kind of compound high-vanadium high-speed steel roller sets of hot rolling bimetallic.Composite high speed steel rider set includes outer layer and internal layer, the outer layer is high-vanadium high-speed steel wearing layer, and it includes following chemical components by mass percentage: C:1.8~2.8%, Si:0.2~1.0%, Mn:0.3~0.8%, V:4~10%, Cr:4~8%, Mo:3~6%, Nb:1.0~4.0%, Co:2.0~5.0%, W≤1.0%, S≤0.03%, P≤0.04%, surplus are Fe and inevitable impurity.The compound high-vanadium high-speed steel roller set of hot rolling bimetallic provided by the invention improves the institutional framework of roller set by the alloying component of optimization roller set to improve the performances such as its intensity;And it can effectively solve the problems such as existing centrifugal casting quick-cutting steel roller set is easy to produce the bad heat treatment of segregation, solid roll.
Description
Technical field
The present invention relates to technical field of metal material, in particular to a kind of compound high-vanadium high-speed steel roller of hot rolling bimetallic
Set.
Background technique
Hot rolling is exactly the rolling carried out more than recrystallization temperature.Compared with cold rolling, metal plastic height when hot rolling, deformation is anti-
Power is low, greatly reduces the energy consumption of flow of metal.Hot rolling can improve the process industrial art performance of metal and alloy, i.e., will casting
The coarse grain of state is broken, and significant crack healing reduces or eliminates casting flaw, and as-cast structure is changed into Deformation structure,
Improve the processing performance of alloy.Therefore, in recent years, hot rolling technique achieves very big development.
Roll is the important component in steel rolling, and steel can be made to act on and occur by draught pressure between the roll of rotation
Plastic deformation, therefore roll needs very high hardness and wearability, in terms of hot-rolling roll, hot-rolling roll roller slot part
It is contacted with red steel, instantaneous temperature is very high, and be cooled water Qiang Leng again later, the operating condition of this instantaneous high-temperature and rapid heat cycle, it is desirable that
Hot-rolling roll will also have good red hardness and toughness.
In the prior art, roll generallys use assembly roller, i.e., is made of roller set and roll shaft.Its central roll set can be used high hard
The material of degree and high abrasion makes, and roll shaft can be used high-intensitive and high tenacity low alloy material and make.
High-speed steel (HSS) is a kind of tool steel with high rigidity, high-wearing feature and high-fire resistance, is a kind of ideal heat
It rolls and uses roll material, be widely applied in the preparation process of roller set.In the prior art, high-speed steel material therefor contain a large amount of W,
The alloying elements such as Mo, V, Cr, in roll preparation process, it is right that Cast High Speed Steel Roll generallys use centrifugal casting high speed steel sleeve
After fill out core casting roll shaft be made into solid roll, be primarily present following defect: first is that since high-speed steel contains a large amount of W, Mo, V, Cr
Equal alloying elements, are easy to produce segregation when using centrifugal casting housing;Second is that the tissue of as cast condition high-speed steel contain it is a large amount of netted
Eutectic carbide, carbide is coarse and at bone shape, reduces Toughness of High Speed Steels and intensity, brittleness is big;Third is that as cast condition high-speed steel
Outer layer high-speed steel inhomogeneous cooling is even when being made into solid roll quenching and tempering, affects the service performance of high-speed steel.
In consideration of it, it is necessary to provide a kind of new techniques to solve above-mentioned technical problem.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of compound high-vanadium high-speed steel roller sets of hot rolling bimetallic, by excellent
Change the alloying component of roller set, improves the institutional framework of roller set to improve the performances such as its intensity;And can effectively solve it is existing from
Heart casting high speed steel roller set is easy to produce the problems such as segregation, solid roll bad heat treatment.
To solve the above-mentioned problems, technical scheme is as follows:
A kind of compound high-vanadium high-speed steel roller set of hot rolling bimetallic, including outer layer and internal layer, the outer layer are high vanadium high speed
Steel wearing layer, it includes following chemical components by mass percentage:
C:1.8~2.8%, Si:0.2~1.0%, Mn:0.3~0.8%, V:4~10%, Cr:4~8%, Mo:3~
6%, Nb:1.0~4.0%, Co:2.0~5.0%, W≤1.0%, S≤0.03%, P≤0.04%, surplus are Fe and can not keep away
The impurity exempted from.
Further, the internal layer is seamless steel pipe, and it includes following chemical components by weight percentage:
C:0.17%~0.30%, Si:0.10%~0.40%, Mn:0.30%~0.70%, S :≤0.035%, P :≤
0.035%, surplus is Fe and inevitable impurity.
Further, the outer layer and the internal layer are by metallurgical bonding, and metallurgical bonding is with a thickness of 0.1-1mm.
Further, the preparation method of the compound high-vanadium high-speed steel roller set of the hot rolling bimetallic, includes the following steps:
Step S1, according to the chemical component of the high-vanadium high-speed steel wearing layer, melting molten steel;
Step S2, seamless steel pipe is surface-treated, and is preheating to 500-900 DEG C, then by the seamless steel after preheating
Pipe is installed in casting die, and wherein the type chamber between seamless steel pipe and casting die forms type when outer layer high-speed steel is cast
Chamber;
Step S3, the type between the molten steel injection seamless steel pipe and casting die of step S1 melting is intracavitary, high-temperature metal
Liquid is contacted with seamless steel pipe parent, is carried out liquid and solid bonding and is formed the compound high-vanadium high-speed steel roller set of bimetallic;
The compound high-vanadium high-speed steel roller set of bimetallic is annealed, is quenched, tempering by step S4.
It further, further include the addition additive step into molten steel after step S1;The additive is with calcium aluminium cored
The form of line and composite inoculating core-spun yarn is added, and wherein calcium-aluminium core cabling wire additional amount accounts for the 0.2%~0.3% of steel quality, multiple
It closes rotten core-spun yarn additional amount and accounts for the 0.4%~1.0% of steel quality,
The inside core material of the calcium-aluminium core cabling wire includes calcium powder and aluminium powder, by weight percentage, calcium powder and aluminium powder it is mixed
Composition and division in a proportion example is respectively 50%~60% and 40%~50%;
The inside core material of the composite inoculating core-spun yarn, including following ingredient by weight percentage: Y:6.0~
10.0%, K+Na:6.0~10.0%, Mg:1.0~3.0%, Ba:2.0~4.0%, Ca:2.0~4.0%, Al:10~
15%, Si:35~40%, surplus are Fe and inevitable impurity.
Further, in step S2, the step of seamless steel pipe is surface-treated, includes:
Remove seamless steel pipe surface scale;
One layer of high-temp antioxidizing paint is applied on seamless steel pipe surface.
Further, pouring molten steel temperature is 1600-1680 DEG C.
Further, in step S4, annealing process are as follows: the compound high-vanadium high-speed steel roller set of bimetallic is slowly warming up to 820
~950 DEG C, 3~8 hours are kept the temperature, then room temperature is cooled in furnace and comes out of the stove.
Further, in step S4, quenching technical are as follows: the compound high-vanadium high-speed steel roller set of bimetallic is slowly warming up to 1020
~1100 DEG C, 4~7 hours are kept the temperature, is then come out of the stove air-cooled or air-cooled to room temperature.
Further, in step S4, tempering process are as follows: slowly rise the compound high-vanadium high-speed steel roller set of quenched bimetallic
Temperature keeps the temperature 4~6 hours, then comes out and cools down to room temperature to 500~600 DEG C.
Compared with prior art, the compound high-vanadium high-speed steel roller set of hot rolling bimetallic provided by the invention, beneficial effect exist
In:
One, the compound high-vanadium high-speed steel roller set of hot rolling bimetallic provided by the invention passes through the conjunction of optimization high speed steel rider set
Golden ingredient improves the institutional framework of roller set to improve its performance, high speed steel rider tackling is made to have higher hardness and impact toughness;
And segregation is not likely to produce in casting process, it efficiently solves centrifugal casting quick-cutting steel roller set in the prior art and is easy to produce segregation
Problem.
Two, the compound high-vanadium high-speed steel roller set of hot rolling bimetallic provided by the invention, outer layer and internal layer pass through metallurgical bonding,
Interpenetrate transition zone with a thickness of 0.1-1mm, and combination interface tissue morphology is good, is evenly distributed.
Three, the compound high-vanadium high-speed steel roller set of hot rolling bimetallic provided by the invention is to be detachably connected with roll shaft, makes roller
Axis can be recycled, so as to reduce the use cost of roll.
Detailed description of the invention
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for
For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings other
Attached drawing.
Fig. 1 is the roll that hot rolling provided by the invention is assembled to form with the compound high-vanadium high-speed steel roller set of bimetallic with roll shaft
Structural schematic diagram;
Fig. 2 is the structural schematic diagram of the compound high-vanadium high-speed steel roller set of hot rolling bimetallic provided by the invention;
Fig. 3 is outer layer metallographic structure figure in the compound high-vanadium high-speed steel roller set of hot rolling bimetallic shown in Fig. 2;
Fig. 4 is outer layer and the electricity at internal layer combination interface in the compound high-vanadium high-speed steel roller set of hot rolling bimetallic shown in Fig. 2
Mirror figure;
Fig. 5 is outer layer and the energy at internal layer combination interface in the compound high-vanadium high-speed steel roller set of hot rolling bimetallic shown in Fig. 2
Spectrum analysis figure.
Specific embodiment
Technical solution in embodiment in order to enable those skilled in the art to better understand the present invention, and make of the invention
Above objects, features, and advantages can be more obvious and easy to understand, with reference to the accompanying drawing makees a specific embodiment of the invention into one
The explanation of step.
It should be noted that being used to help understand the present invention for the explanation of these embodiments, but do not constitute
Limitation of the invention.In addition, as long as technical characteristic involved in the various embodiments of the present invention described below is each other
Between do not constitute conflict and can be combined with each other.
Fig. 1 is please referred to, is that the compound high-vanadium high-speed steel roller set of hot rolling bimetallic provided by the invention is assembled with roll shaft
The structural schematic diagram of the roll of formation.The compound high-vanadium high-speed steel roller set 100 of hot rolling bimetallic provided by the invention and roll shaft 200
It is assembled to form assembly roller 10, wherein the compound high-vanadium high-speed steel roller set 100 of hot rolling bimetallic can with the assembly method of roll shaft 200
Using the assembly method of prior art central roll set and roll shaft, this will not be repeated here.
The present invention is manufactured by covering roller with roll shaft respectively, is only assembled when needed, and wherein roll shaft can be recycled,
Reduce the use cost of assembly roller 10.The two is prepared separately, and in the heat treatment process of roller set, can make the height of roller set outer layer
More evenly, and then the service performance of high-speed steel can be improved in fast steel heating, cooling effect.
The alloying component optimization and preparation for focusing on the compound high-vanadium high-speed steel roller set 100 of hot rolling bimetallic of the invention
Process optimization, to improve the comprehensive performance of roller set.
Fig. 2 is please referred to, is the structural representation of the compound high-vanadium high-speed steel roller set of hot rolling bimetallic provided by the invention
Figure.The compound high-vanadium high-speed steel roller set 100 of hot rolling bimetallic provided by the invention, including outer layer 11 and internal layer 12, and outer layer 11
Pass through metallurgical bonding with internal layer 12.
Wherein outer layer 11 is high-vanadium high-speed steel wearing layer, and it includes following chemical components by mass percentage:
C:1.8~2.8%, Si:0.2~1.0%, Mn:0.3~0.8%, V:4~10%, Cr:4~8%, Mo:3~
6%, Nb:1.0~4.0%, Co:2.0~5.0%, W≤1.0%, S≤0.03%, P≤0.04%, surplus are Fe and can not keep away
The impurity exempted from.
C content control: the wearability of Yao Tigao roll, it is necessary to there are enough carbide, in all carbide, MC type
Carbide hardness highest, wearability are best.C is element necessary to forming carbide, C content is too low cannot generate it is enough
Carbide, influence wearability;On the other hand, C content is excessively high can make carbide excessive, cause toughness decline and poor thermal conductivity,
It is easy to produce fire check and fatigue flake.C content control is 1.8~2.8% in the present invention.
V content control: the compound that V and C is formed is VC and V4C3, Vickers hardness is most hard wear resistant up to HV up to 2600
Carbide, and vanadium carbon compound form is good, mostly the nodular and lumps of Dispersed precipitate, small to the effect of isolating of matrix.
In order to guarantee that roller is cased with enough hardness and wearability, V content is controlled in 4-10% in the present invention;If V content is excessively high, steel can be made
Aqueous fusion point rises, so as to cause a series of problems in casting technique.
The control of Cr content: Cr and C forms M7C3 type carbide, can improve wearability;Simultaneously chromium also increase it is anti-oxidant and
Erosion-resisting effect can play the viscous force for reducing roll and steel in the hot rolling, increase Roll surface finish.This hair
Bright middle Cr content control is 4~8%.
The control of Mo content: Mo, which has, strengthens MC type carbide and M7C3 type carbide, reduces size, the refinement group of carbide
The effect knitted can significantly improve roll wearability, and the control of Mo content is 3.0~6.0% in the present invention.
W content control: W can be solid-solution in high speed steel substrate, improve the hardness and redhardneas of high-speed steel, but tungsten and C formation
Carbide is in wedge angle fractions distribution, big to the effect of isolating of high speed steel substrate, while can reduce the toughness of casting high speed steel and lead
Hot coefficient controls W content below 1.0% for being easy to cause generation fire check when hot roll, therefore in the present invention.
The control of Nb content: Nb can strongly facilitate to form MC carbide, and tough compound MC carbonization can be generated jointly with V, Mo
Object significantly improves wearability.Precipitation Temperature of the NbC ratio VC in molten steel is high, and niobium may replace the shape that vanadium participates in MC type carbide
At, force V to be solid-solution in matrix, be conducive to improve roll post-curing ability.In the present invention, Nb content is controlled 1~4%.
The control of Co content: Co can promote carbide to be more dissolved in matrix in high temperature austenite, and it is hard to improve matrix
The precipitation of degree and proeutectoid carbide, to improve the heat resistance of high-speed steel, high temperature hardness and wear-resisting property.In order to guarantee high speed
Steel rider is cased with hardness red enough and wearability, in the present invention, controls Co content 2-5%;If Co content is too high, high-speed steel can be reduced
Toughness, so that it is become more crisp.
Internal layer 12 is seamless steel pipe, and it includes following chemical components by weight percentage:
C:0.17%~0.30%, Si:0.10%~0.40%, Mn:0.30%~0.70%, S :≤0.035%, P :≤
0.035%, surplus is Fe and inevitable impurity.
The compound high-vanadium high-speed steel roller set 100 of hot rolling bimetallic provided by the invention, preparation method includes the following steps:
Step S1, according to the chemical component of above-mentioned high-vanadium high-speed steel wearing layer, melting molten steel;
In order to improve steel quality, improve casting state, in the present invention, it is preferable that be added in melting molten steel suitable
Additive.On the one hand the addition of additive is conducive to the content for adjusting and controlling oxidizable element and microelement, can larger amplitude
Degree improves alloy yield, reduces smelting cost, shortens the heat, is precisely controlled to point;On the other hand, pure molten steel can be played
And part changes the effect of field trash property and form.
When liquid steel temperature reaches 1620 DEG C, calcium-aluminium core cabling wire and composite inoculating packet is added in wire feeder first backward molten steel
Core wire, wherein calcium-aluminium core cabling wire additional amount accounts for the 0.2%~0.3% of steel quality, and composite inoculating core-spun yarn additional amount accounts for molten steel
The 0.4%~1.0% of quality.It is formed it should be noted that core-spun yarn refers to by band shape steel band winding alloy powder, conjunction therein
Bronze end is corresponding additive.For aspect description, the substance of steel band winding is known as internal core material below.
In conjunction with the ingredient of molten steel of the present invention, it is preferable that the inside core material of calcium-aluminium core cabling wire includes calcium powder and aluminium powder, by weight
The mixed proportion of percentages, calcium powder and aluminium powder is respectively 50%~60% and 40%~50%;
The inside core material of composite inoculating core-spun yarn, including following ingredient by weight percentage: Y:6.0~10.0%, K
+ Na:6.0~10.0%, Mg:1.0~3.0%, Ba:2.0~4.0%, Ca:2.0~4.0%, Al:10~15%, Si:35~
40%, surplus is Fe and inevitable impurity.
The use of composite modifier can reduce S in molten steel, O content, increase the degree of supercooling of eutectic freezing, keep eutectic structure thin
Change, while the fine particle that rare earth and liquid reactant metal generate, the forming core effect of accelerated solidification, refined carbides make to be carbonized
Object balling-up bulk is uniformly distributed.
Step S2, seamless steel pipe is surface-treated, and is preheating to 500-900 DEG C, then by the seamless steel after preheating
Pipe is installed in casting die, and wherein the type chamber between seamless steel pipe and casting die forms type when outer layer high-speed steel is cast
Chamber;
Specifically, seamless steel pipe surface treatment includes:
Seamless steel pipe surface scale is removed using one of shot-peening, pickling or turning mode;
One layer of high-temp antioxidizing paint is applied on seamless steel pipe surface.The high-temp antioxidizing paint is to appoint in the prior art
High-temp antioxidizing paint used in a kind of metal surface, this will not be repeated here.
In the step, it should be noted that when seamless steel pipe is installed to casting die, need to keep seamless steel pipe and casting
Mold is concentric, i.e., the type chamber spacing between seamless steel pipe and casting die is consistent, so that the outer layer thickness for guaranteeing that casting is formed is equal
It is even.
Step S3, the type between the molten steel injection seamless steel pipe and casting die of step S1 melting is intracavitary, high-temperature metal
Liquid is contacted with seamless steel pipe parent, is carried out liquid and solid bonding and is formed the compound high-vanadium high-speed steel roller set of bimetallic;
In the step, molten steel cast temperature should be not less than 1600 DEG C, be preferably 1600-1680 DEG C in the present invention.High temperature gold
Belong to the antioxidizing paint protective layer on liquid fusing seamless steel pipe surface, the antioxidizing paint being melted floats to riser, high temperature gold
Belong to liquid to contact with seamless steel pipe parent, carries out liquid and solid bonding and form the compound high-vanadium high-speed steel roller set of bimetallic.
The compound high-vanadium high-speed steel roller set of bimetallic is annealed, is quenched, tempering by step S4.
Preferably, annealing process are as follows:
The compound high-vanadium high-speed steel roller set of bimetallic is slowly warming up to 820~950 DEG C, 3~8 hours are kept the temperature, then in furnace
200 DEG C or less are cooled to come out of the stove.The annealing process helps to reduce compound high-vanadium high-speed steel roller set hardness, improves machining
Property, residual stress is eliminated, deformation and crackle tendency, refinement crystal grain are reduced.
Further, quenching technical are as follows:
The compound high-vanadium high-speed steel roller set of bimetallic is slowly warming up to 1020~1100 DEG C, 4~7 hours is kept the temperature, then goes out
Furnace is air-cooled or air-cooled to room temperature.The effect of the quenching technical is that the tissue of high-speed steel is made to carry out martensite or bainite transformation, is obtained
To martensite or bainite structure, to improve its hardness, wearability.
Further, tempering process are as follows:
The compound high-vanadium high-speed steel roller set of quenched bimetallic is slowly warming up to 500~600 DEG C, keeps the temperature 4~6 hours,
Then it comes out and cools down to room temperature.The effect of the tempering process is the internal stress reduced or eliminated in quenching roller set, adjusts its hardness
And intensity, to improve its ductility or toughness.In the present invention, times of tempering is 2~3 times.
Below in conjunction with specific embodiment, the compound high-vanadium high-speed steel of hot rolling bimetallic provided by the invention is further illustrated
The mechanical property of roller set.
Embodiment 1
The compound high-vanadium high-speed steel roller set of the hot rolling bimetallic of the present embodiment, outer layer high-speed steel wearing layer are working lining,
Outer diameter is Ф 400mm;Internal layer mild steel is 20# seamless steel pipe, and outer diameter is Ф 270mm, wall thickness 35mm.
In the present embodiment, the preparation process of the compound high-vanadium high-speed steel roller set of hot rolling bimetallic includes the following steps:
Step S1, the outer layer molten steel that first the compound high-vanadium high-speed steel roller of melting covers in medium-frequency induction furnace, chemical component
Including following ingredient by weight percentage:
C:2.1%, Si:0.90%, Mn:0.58%, S≤0.03%, P≤0.04%, V:6%, Cr:4.8%, Mo:
3.5%, Nb:1.0%, Co:2.0%, W:0.8%, surplus are Fe and inevitable impurity;
When the temperature of above-mentioned molten steel reaches 1620 DEG C, calcium-aluminium core cabling wire, calcium aluminium packet are first added into molten steel with wire feeder
Core wire additional amount accounts for the 0.2% of steel quality score;After calcium-aluminium core cabling wire adds 2 minutes, it is added with wire feeder into molten steel multiple
Rotten core-spun yarn is closed, composite inoculating core-spun yarn additional amount accounts for the 0.5% of steel quality score, is stirred after being added to molten steel
With skim;
Wherein, the inside core material of calcium-aluminium core cabling wire includes calcium powder and aluminium powder, by weight percentage, calcium powder and aluminium powder it is mixed
Composition and division in a proportion example is respectively 50%~60% and 40%~50%;
The inside core material of composite inoculating core-spun yarn, including following ingredient by weight percentage: Y:6.0~10.0%, K
+ Na:6.0~10.0%, Mg:1.0~3.0%, Ba:2.0~4.0%, Ca:2.0~4.0%, Al:10~15%, Si:35~
40%, surplus is Fe and inevitable impurity.
Step S2 removes seamless steel pipe surface scale, and seamless steel pipe outer diameter is Ф 270mm, with a thickness of 35mm, and in nothing
It stitches steel tube surface and applies one layer of high-temp antioxidizing paint, then seamless steel pipe is put into electric furnace and is preheating to 600 DEG C, be then mounted to circle
In the casting model of shape and concentric with it, the type chamber between seamless steel pipe and casting model is type when outer layer high-speed steel is cast
Chamber;
Step S3, the type between the molten steel injection seamless steel pipe and casting model of step S1 melting is intracavitary, molten steel temperature
It is 1600 degree, high temperature metal liquid is contacted with seamless steel pipe, is carried out liquid and solid bonding and is formed bimetallic composite roll set.
Compound high-vanadium high-speed steel roller set is annealed, is quenched, tempering by step S4.
Wherein, annealing process is that compound high-vanadium high-speed steel roller set is slowly warming up to 890 DEG C, keeps the temperature 4 hours, delays in furnace
Room temperature is as cold as to come out of the stove;
Quenching technical is that compound high-vanadium high-speed steel roller set is slowly warming up to 1020 DEG C, keeps the temperature 4 hours, comes out of the stove in air
It is as cold as room temperature;
It is tempered 3 times after quenching, tempering process is that compound high-vanadium high-speed steel roller set is slowly warming up to 550 DEG C, and heat preservation 4 is small
When, it comes out of the stove and is as cold as room temperature in air;
Compound high-vanadium high-speed steel roller set outer diameter, inner hole, length are processed, and assembles to obtain assembly roller with roll shaft.
Embodiment 2
The compound high-vanadium high-speed steel roller set of the hot rolling bimetallic of the present embodiment, substantially the same manner as Example 1, difference exists
In:
(1) in the present embodiment, outer layer alloys ingredient includes following ingredient by weight percentage:
C:1.8%, Si:0.5%, Mn:0.3%, S≤0.03%, P≤0.04%, V:5%, Cr:6%, Mo:5%, Nb:
3%, Co:4.0%, W:0.5%, surplus are Fe and inevitable impurity;
(2) in the present embodiment, seamless steel pipe preheating temperature is 700 DEG C, and molten steel cast temperature is 1620 DEG C;
(3) in the present embodiment, annealing process are as follows: the compound high-vanadium high-speed steel roller set of bimetallic is slowly warming up to 820 DEG C, is protected
Temperature 8 hours, is then cooled to room temperature in furnace and comes out of the stove;
Quenching technical are as follows: the compound high-vanadium high-speed steel roller set of bimetallic is slowly warming up to 1050 DEG C, keeps the temperature 6 hours, then
It comes out of the stove air-cooled or air-cooled to room temperature;
Tempering process are as follows: the compound high-vanadium high-speed steel roller set of quenched bimetallic is slowly warming up to 500 DEG C, heat preservation 6 is small
When, it then comes out and cools down to room temperature.
Embodiment 3
The compound high-vanadium high-speed steel roller set of the hot rolling bimetallic of the present embodiment, substantially the same manner as Example 1, difference exists
In:
(1) in the present embodiment, outer layer alloys ingredient includes following ingredient by weight percentage:
C:2.8%, Si:0.2%, Mn:0.4%, S≤0.03%, P≤0.04%, V:4%, Cr:8%, Mo:3%, Nb:
2%, Co:3.5%, W:1.0%, surplus are Fe and inevitable impurity;
(2) in the present embodiment, seamless steel pipe preheating temperature is 500 DEG C, and molten steel cast temperature is 1640 DEG C;
(3) in the present embodiment, annealing process are as follows: the compound high-vanadium high-speed steel roller set of bimetallic is slowly warming up to 850 DEG C, is protected
Temperature 6 hours, is then cooled to room temperature in furnace and comes out of the stove;
Quenching technical are as follows: the compound high-vanadium high-speed steel roller set of bimetallic is slowly warming up to 1040 DEG C, keeps the temperature 7 hours, then
It comes out of the stove air-cooled or air-cooled to room temperature;
Tempering process are as follows: the compound high-vanadium high-speed steel roller set of quenched bimetallic is slowly warming up to 520 DEG C, heat preservation 5 is small
When, it then comes out and cools down to room temperature.
Embodiment 4
The compound high-vanadium high-speed steel roller set of the hot rolling bimetallic of the present embodiment, substantially the same manner as Example 1, difference exists
In:
(1) in the present embodiment, outer layer alloys ingredient includes following ingredient by weight percentage:
C:2.3%, Si:1.0%, Mn:0.8%, S≤0.03%, P≤0.04%, V:8%, Cr:4%, Mo:6%, Nb:
4%, Co:2.5%, W:0.7%, surplus are Fe and inevitable impurity;
(2) in the present embodiment, seamless steel pipe preheating temperature is 550 DEG C, and molten steel cast temperature is 1650 DEG C;
(3) in the present embodiment, annealing process are as follows: the compound high-vanadium high-speed steel roller set of bimetallic is slowly warming up to 870 DEG C, is protected
Temperature 5 hours, is then cooled to room temperature in furnace and comes out of the stove;
Quenching technical are as follows: the compound high-vanadium high-speed steel roller set of bimetallic is slowly warming up to 1080 DEG C, keeps the temperature 5 hours, then
It comes out of the stove air-cooled or air-cooled to room temperature;
Tempering process are as follows: the compound high-vanadium high-speed steel roller set of quenched bimetallic is slowly warming up to 570 DEG C, heat preservation 4.5
Hour, it then comes out and cools down to room temperature.
Embodiment 5
The compound high-vanadium high-speed steel roller set of the hot rolling bimetallic of the present embodiment, substantially the same manner as Example 1, difference exists
In:
(1) in the present embodiment, outer layer alloys ingredient includes following ingredient by weight percentage:
C:2.6%, Si:0.4%, Mn:0.6%, S≤0.03%, P≤0.04%, V:10%, Cr:5.3%, Mo:6%,
Nb:2.5%, Co:2.8%, W:0.6%, surplus are Fe and inevitable impurity;
(2) in the present embodiment, seamless steel pipe preheating temperature is 800 DEG C, and molten steel cast temperature is 1680 DEG C;
(3) in the present embodiment, annealing process are as follows: the compound high-vanadium high-speed steel roller set of bimetallic is slowly warming up to 920 DEG C, is protected
Temperature 4 hours, is then cooled to room temperature in furnace and comes out of the stove;
Quenching technical are as follows: the compound high-vanadium high-speed steel roller set of bimetallic is slowly warming up to 1100 DEG C, keeps the temperature 5.5 hours, so
After come out of the stove it is air-cooled or air-cooled to room temperature;
Tempering process are as follows: the compound high-vanadium high-speed steel roller set of quenched bimetallic is slowly warming up to 590 DEG C, heat preservation 5.5
Hour, it then comes out and cools down to room temperature.
Embodiment 6
The compound high-vanadium high-speed steel roller set of the hot rolling bimetallic of the present embodiment, substantially the same manner as Example 1, difference exists
In:
(1) in the present embodiment, outer layer alloys ingredient includes following ingredient by weight percentage:
C:2.5%, Si:0.7%, Mn:0.45%, S≤0.03%, P≤0.04%, V:7%, Cr:6.7%, Mo:4%,
Nb:1.8%, Co:3%, W:0.4%, surplus are Fe and inevitable impurity;
(2) in the present embodiment, seamless steel pipe preheating temperature is 900 DEG C, and molten steel cast temperature is 1670 DEG C;
(3) in the present embodiment, annealing process are as follows: the compound high-vanadium high-speed steel roller set of bimetallic is slowly warming up to 950 DEG C, is protected
Temperature 3 hours, is then cooled to room temperature in furnace and comes out of the stove;
Quenching technical are as follows: the compound high-vanadium high-speed steel roller set of bimetallic is slowly warming up to 1070 DEG C, keeps the temperature 6 hours, then
It comes out of the stove air-cooled or air-cooled to room temperature;
Tempering process are as follows: the compound high-vanadium high-speed steel roller set of quenched bimetallic is slowly warming up to 600 DEG C, heat preservation 4 is small
When, it then comes out and cools down to room temperature.
Hardness will be carried out respectively after the hot rolling of the embodiment 1-6 compound high-vanadium high-speed steel roller set tempering of bimetallic and impact tries
It tests, wherein the method for impact test are as follows: Charpy pendulu impact, impact energy 300J, 150 ° of pivot angle, non-notch sample 10mm*
10mm*55mm.Testing result is as follows:
The hot rolling of embodiment 1 is subjected to metallographic detection with the compound high-vanadium high-speed steel roller set of bimetallic.Please refer to Fig. 3-
Fig. 5, wherein Fig. 3 is outer layer metallographic structure figure in the compound high-vanadium high-speed steel roller set of hot rolling bimetallic shown in Fig. 2;Fig. 4 is Fig. 2 institute
Show outer layer and the electron microscope at internal layer combination interface in the compound high-vanadium high-speed steel roller set of hot rolling bimetallic;Fig. 5 is heat shown in Fig. 2
It rolls with outer layer in the compound high-vanadium high-speed steel roller set of bimetallic and the energy spectrum analysis figure at internal layer combination interface.
As seen from Figure 3, the compound high-vanadium high-speed steel roller set of hot rolling bimetallic provided by the invention, outer layer carbide group
It is good to knit form, is evenly distributed, high-speed steel outer layer does not generate segregation phenomena when casting.
In Fig. 4, Fig. 5, left side is internal layer, and right side is outer layer;And internal layer and outer layer are metallurgy it can be seen from Fig. 4, Fig. 5
In conjunction with, interpenetrate transition zone with a thickness of 0.1-1mm, further illustrate, outer layer and internal layer metallurgical bonding are good, can avoid roller
Cover the obscission generated due in conjunction with insecure in use.
All the embodiments in this specification are described in a progressive manner, same and similar portion between each embodiment
Dividing may refer to each other, and the highlights of each of the examples are differences from other embodiments.
Embodiments of the present invention are explained in detail in conjunction with attached drawing above, but the present invention is not limited to described reality
Apply mode.To those skilled in the art, without departing from the principles and spirit of the present invention to these embodiments
The a variety of change, modification, replacement and modification carried out are still fallen within protection scope of the present invention.
Claims (10)
1. a kind of compound high-vanadium high-speed steel roller set of hot rolling bimetallic, including outer layer and internal layer, which is characterized in that the outer layer is
High-vanadium high-speed steel wearing layer, it includes following chemical components by mass percentage:
C:1.8~2.8%, Si:0.2~1.0%, Mn:0.3~0.8%, V:4~10%, Cr:4~8%, Mo:3~6%,
Nb:1.0~4.0%, Co:2.0~5.0%, W≤1.0%, S≤0.03%, P≤0.04%, surplus are for Fe and inevitably
Impurity.
2. the compound high-vanadium high-speed steel roller set of hot rolling bimetallic according to claim 1, which is characterized in that the internal layer is
Seamless steel pipe, it includes following chemical components by weight percentage:
C:0.17%~0.30%, Si:0.10%~0.40%, Mn:0.30%~0.70%, S :≤0.035%, P :≤
0.035%, surplus is Fe and inevitable impurity.
3. the compound high-vanadium high-speed steel roller set of hot rolling bimetallic according to claim 1, which is characterized in that the outer layer with
The internal layer is by metallurgical bonding, and metallurgical bonding is with a thickness of 0.1-1mm.
4. the compound high-vanadium high-speed steel roller set of hot rolling bimetallic according to any one of claim 1-3, which is characterized in that
The preparation method of the compound high-vanadium high-speed steel roller set of hot rolling bimetallic, includes the following steps:
Step S1, according to the chemical component of the high-vanadium high-speed steel wearing layer, melting molten steel;
Step S2, seamless steel pipe is surface-treated, and is preheating to 500-900 DEG C, then pacifies the seamless steel pipe after preheating
It is attached in casting die, wherein the type chamber between seamless steel pipe and casting die forms type chamber when outer layer high-speed steel is cast;
Step S3, the type between the molten steel injection seamless steel pipe and casting die of step S1 melting is intracavitary, high temperature metal liquid
It is contacted with seamless steel pipe parent, carries out liquid and solid bonding and form the compound high-vanadium high-speed steel roller set of bimetallic;
The compound high-vanadium high-speed steel roller set of bimetallic is annealed, is quenched, tempering by step S4.
5. the compound high-vanadium high-speed steel roller set of hot rolling bimetallic according to claim 4, which is characterized in that after step S1
It further include the addition additive step into molten steel;The additive is added in the form of calcium-aluminium core cabling wire and composite inoculating core-spun yarn
Enter, wherein calcium-aluminium core cabling wire additional amount accounts for the 0.2%~0.3% of steel quality, and composite inoculating core-spun yarn additional amount accounts for molten steel matter
The 0.4%~1.0% of amount,
The inside core material of the calcium-aluminium core cabling wire includes calcium powder and aluminium powder, by weight percentage, the mixing ratio of calcium powder and aluminium powder
Example is respectively 50%~60% and 40%~50%;
The inside core material of the composite inoculating core-spun yarn, including following ingredient by weight percentage: Y:6.0~10.0%, K
+ Na:6.0~10.0%, Mg:1.0~3.0%, Ba:2.0~4.0%, Ca:2.0~4.0%, Al:10~15%, Si:35~
40%, surplus is Fe and inevitable impurity.
6. the compound high-vanadium high-speed steel roller set of hot rolling bimetallic according to claim 4, which is characterized in that in step S2,
The step of seamless steel pipe is surface-treated include:
Remove seamless steel pipe surface scale;
One layer of high-temp antioxidizing paint is applied on seamless steel pipe surface.
7. the compound high-vanadium high-speed steel roller set of hot rolling bimetallic according to claim 4, which is characterized in that pouring molten steel temperature
Degree is 1600-1680 DEG C.
8. the compound high-vanadium high-speed steel roller set of hot rolling bimetallic according to claim 4, which is characterized in that in step S4,
Annealing process are as follows:
The compound high-vanadium high-speed steel roller set of bimetallic is slowly warming up to 820~950 DEG C, keeps the temperature 3~8 hours, it is then cooling in furnace
It comes out of the stove to room temperature.
9. the compound high-vanadium high-speed steel roller set of hot rolling bimetallic according to claim 4, which is characterized in that in step S4,
Quenching technical are as follows:
The compound high-vanadium high-speed steel roller set of bimetallic is slowly warming up to 1020~1100 DEG C, keeps the temperature 4~7 hours, wind of then coming out of the stove
It is cold or air-cooled to room temperature.
10. the compound high-vanadium high-speed steel roller set of hot rolling bimetallic according to claim 4, which is characterized in that in step S4,
Tempering process are as follows:
The compound high-vanadium high-speed steel roller set of quenched bimetallic is slowly warming up to 500~600 DEG C, keeps the temperature 4~6 hours, then
It comes out and cools down to room temperature.
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
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CN112605388A (en) * | 2020-11-30 | 2021-04-06 | 湖南三泰新材料股份有限公司 | Preparation method of high-chromium cast iron alloy composite roller |
CN112941402A (en) * | 2021-01-28 | 2021-06-11 | 黄石中睿科技有限责任公司 | Wear-resistant alloy bar and preparation method thereof |
CN117226075A (en) * | 2023-10-08 | 2023-12-15 | 湖南省品源机械制造有限公司 | Integrally formed bimetal cast roller and casting process thereof |
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CN103890208A (en) * | 2011-10-19 | 2014-06-25 | 杰富意钢铁株式会社 | Roll surface-layer material for hot rolling with excellent fatigue resistance produced by centrifugal casting, and composite roll for hot rolling produced through centrifugal casting |
JP2017185548A (en) * | 2016-03-31 | 2017-10-12 | 日立金属株式会社 | Centrifugal casting hot-rolling compound roll |
CN107574362A (en) * | 2017-09-19 | 2018-01-12 | 河南科技大学 | A kind of antifriction alloy composite ring and its manufacture method, manufacture device |
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CN103890208A (en) * | 2011-10-19 | 2014-06-25 | 杰富意钢铁株式会社 | Roll surface-layer material for hot rolling with excellent fatigue resistance produced by centrifugal casting, and composite roll for hot rolling produced through centrifugal casting |
JP2017185548A (en) * | 2016-03-31 | 2017-10-12 | 日立金属株式会社 | Centrifugal casting hot-rolling compound roll |
CN107574362A (en) * | 2017-09-19 | 2018-01-12 | 河南科技大学 | A kind of antifriction alloy composite ring and its manufacture method, manufacture device |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
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CN112605388A (en) * | 2020-11-30 | 2021-04-06 | 湖南三泰新材料股份有限公司 | Preparation method of high-chromium cast iron alloy composite roller |
CN112941402A (en) * | 2021-01-28 | 2021-06-11 | 黄石中睿科技有限责任公司 | Wear-resistant alloy bar and preparation method thereof |
CN117226075A (en) * | 2023-10-08 | 2023-12-15 | 湖南省品源机械制造有限公司 | Integrally formed bimetal cast roller and casting process thereof |
CN117226075B (en) * | 2023-10-08 | 2024-02-23 | 湖南省品源机械制造有限公司 | Manufacturing process of integrally formed bimetal cast roller |
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