CN109317520A - Composite roll set and its manufacturing method for pipe-mill - Google Patents
Composite roll set and its manufacturing method for pipe-mill Download PDFInfo
- Publication number
- CN109317520A CN109317520A CN201811421483.7A CN201811421483A CN109317520A CN 109317520 A CN109317520 A CN 109317520A CN 201811421483 A CN201811421483 A CN 201811421483A CN 109317520 A CN109317520 A CN 109317520A
- Authority
- CN
- China
- Prior art keywords
- composite roll
- temperature
- metal mold
- mill
- inner layer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
- B21B27/02—Shape or construction of rolls
- B21B27/03—Sleeved rolls
- B21B27/035—Rolls for bars, rods, rounds, tubes, wire or the like
Landscapes
- Physics & Mathematics (AREA)
- Geometry (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
Abstract
For the composite roll set and its manufacturing method of pipe-mill, belong to technical field of steel rolling.Melting composite roll covers in medium-frequency induction furnace cladding material and inner layer material respectively, the chemical composition and its mass fraction of cladding material are 2.19-2.35%C, 0.82-0.97%B, 0.31-0.38%Al, 8.87-9.16%Cr, 3.57-3.76%Mn, 0.52-0.58%Te, 0.15-0.23%Ce, 0.08-0.13%Ti, 0.05-0.11%N, 0.13-0.17%Ca, 0.54-0.70%Si, < 0.035%P, < 0.032%S, surplus Fe, outer layer and internal layer are combined into one by centre spinning method, composite roll set of the present invention is used for pipe-mill, using safe, reliably, without cracking in use, stripping Phenomenon appearance is fallen, promoting and applying has good economic and social benefit.
Description
Technical field
The invention discloses a kind of composite roll set and preparation method thereof, in particular to for pipe-mill composite roll set and
Its manufacturing method, belongs to technical field of steel rolling.
Background technique
Since the 1950s, due to the breakthrough of drive technology and Electrical Control Technology, Continuous Seamless Tube Mill production technology is obtained
Significant progress.The plug method of operation is rolled from floating type plug milling train to restraint formula plug milling train and semi-floating plug
Machine, rack number are reduced to 6~5 framves from 9~7 framves, and rolling mill practice becomes 3 rollers from 2 rollers, the mode of operation of production process by manually to
Region is automated to the full-automatic method of operation that sliver is controlled by CPU, PLC, uses hydraulic small storehouse control technology, mating
Technology controlling and process software technology, the whole equipment of tandem rolling tube machine are greatly improved.
Compared with other types, the features such as tandem rolling tube machine is with high-quality, highly efficient and productive rate, low consumption, become world's seamless steel
Manage the first-selected type of main manufacturing enterprise.The newly-built tandem rolling tube mill in the whole world has and covers 20 more in the past 10 years, up to the present, the whole world
Existing tandem rolling tube mill more than 80 covers, and considerably beyond the production capacity of other types, tandem rolling tube machine has become seamless the production capacity of type
The mainstream model of steel pipe's production.It is to have introduced Germany in phase early 1980s, Bao Steel that tandem rolling tube machine, which enters China,Floating type plug tandem rolling tube mill, the beginning of the nineties Tianjin Steel Pipe Corp. introduced from Italy it is more advancedRetained mandrel tandem rolling tube mill, then, Hengyang Steel Pipe Mill and equipment Imported From German EMH CompanySemi-floating plug Continuous Seamless Tube Mill
Milling train.Rapid growth of the in the 21st century, with demand pipe, Baogang, Anshan iron and steel plant, Steel Tube in Tianjin, Hengyang steel pipe, Chengdu seamless steel
Guan Deng enterprise has successively introduced several set tandem rolling tube mills.The operation of a large amount of pipe-mills, there is an urgent need to high performance roller sets, meet
The needs of pipe-mill.In order to improve roller set performance,
Chinese invention patent CN1350890 discloses a kind of bushing roller product, it is composed of roller set and roller core, special
Sign is: roller set is made of the outer layer of unlike material, transition zone and internal layer three parts, and transition zone both separated outer layer and internal layer
Opening makes it be not directly contacted with and be fused together in metallurgy meaning with the two respectively and becomes three layers of composite roll set.Roller set is outer
Layer material is the high-alloy metal material with excellent wear and resistance to surface roughening, the weight percent of chemical component
Are as follows: C1.0~3.4%, Si0.5~3.2%, Mn0.4~1.2%, Cr2~19%, Mo0.4~8%, also containing V8% or less,
One or more of Nb4% or less, W4% or less, Ni5% or less, Co6% or less, N0.2% or less, remaining is
Fe and inevitable impurity.Roller set transition zone chemical component weight percent are as follows: C0.6~2.8%, Si0.4~2.9%,
Mn0.3~1.2%, Cr10% or less, Mo2% or less, V2% or less, Nb2% or less, Ni1.6% are hereinafter, remaining is Fe and not
Evitable impurity.Chinese invention patent CN 106825516 also discloses a kind of roll composite roll set manufacturing process and equipment,
800~1000 are integrally heated to the thick-wall hollow steel pipe plug being mounted in Combined water cooling crystallizer using induction heater
DEG C, roll shaft working lining melt is poured into, continues heating 10~50 minutes, starting lifting device mentions heater with certain speed upwards
It rises, is raised within 5~15 minutes insulation ring stopping, continuing heating 10~50 minutes, feeding is carried out to riser, stops water flowing after heating
It is 30 minutes~24 hours cooling.The invention manufactures composite roll set, and controllable process parameters are few, and compound bed boundary is easily controllable, technique
Simply, high-efficient, power consumption is small, and composite layer is without component segregation, long service life.It overcomes centrifugal process and is also easy to produce microstructure segregation, pass
Poor, the at high cost deficiency of insert process performance of uniting.It is double that Chinese utility model patent 200920247114.0 also discloses a kind of heavy wall
Metallic roll covers assembly roller, including bearing supporting ring, pressure ring, roller set and mandrel.After bearing supporting ring (1), roller set (3) heating
It is interference fitted with mandrel (4), bearing supporting ring (1) and roller set (3) junction outer diameter are worked into identical size, while and pressure ring
(2) interference fit joint is kept；Roller set (3) is roll barrel diameter with a thickness of Φ D, and Φ d is roller neck diameter.The utility model
Stable structure solves the problems, such as that roller set work roll cooling central roll set is easily broken, has expanded the use scope of roller set roll, and whole
Body roll is compared, and roll working life can significantly improve, can change greatly after use it is small be used for multiple times, scrapping rear precious alloy can
All recycling, internal layer ensure the safety in use process using high-toughness materials such as seamless steel pipes, assembly roller energy conservation drop
Consumption, cost efficiency significant effect.Chinese invention patent CN1339342 also discloses a kind of manufacturer of high speed steel roll ring
Method, main points be first manufacture quick-cutting steel electrode hollow billet, be then placed on Quench crystallizer roller set electroslag remelting equipment in into
Blank is made in row electroslag remelting, then is heat-treated and is machined.The advantages of invention is: roll sleeve crystal grain is tiny, tissue
Uniformly, field trash is few, the defects of without shrinkage cavity, loose, element segregation, the comprehensive performances such as wearability, obdurability can be made to mention significantly
Height prolongs the service life, and rational technology, simple and easy, small investment, and manufacturing method is at low cost.Current centrifugal casting can be overcome
The shortcoming for making the manufacture roll such as method and CPC method or roller set, further increases wearability and obdurability.It can be used for manufacturing steel pipe
The rollers such as milling train, high-speed rod pre-finishing mill, narrowband finishing mill and bar milk set and roll.Chinese invention patent
CN108677083 also discloses a kind of production method of hot rolled seamless steel tube production alloy collars.Alloy collars, by outer layer and
Two layers of centrifugal compound structure composition of internal layer, the collars outer layer are high manganese molybdenum cast iron material, and internal layer is graphite steel material.Alloy roller
The production method of ring, using Centrifugal compound foundry process, process program further include: the spraying of centrifugal cold mould coating, molten metal are molten
Refining and Metamorphism treatment, centrifugal casting, melt pit heat preservation, heat treatment.The invention working lining uses high manganese molybdenum cast iron material, makes full use of
It is high-intensitive, high resistance to make it have it for high tenacity, the wearability of the high rigidity of manganese, the characteristic of the strong carbide element of intensity and molybdenum
Mill property, thermal fatigue resistance energy, more common pearlite and bainite collars, production cost reduces 10~15%, and it is used
Service life can be improved 2~3 times, can substitute conventional pearlitic and bainite collars.Chinese invention patent CN108660361 is also disclosed
Hot rolled seamless steel tube high speed steel roll collar and preparation method thereof, melting high-speed steel molten steel in medium-frequency induction furnace, and adjust height
The chemical composition of fast steel molten steel: 3.22-3.45%C, 1.07-1.22%W, 2.39-2.61%Mo, 1.55-1.86%V,
12.44-12.67%Cr, 0.37-0.54%Mn, 0.63-0.87%Si, 0.29-0.41%Al ,≤0.035%S ,≤
0.035%P, surplus Fe come out of the stove molten steel to ladle when liquid steel temperature reaches 1586-1609 DEG C, are previously added in ladle more
First alloying pellet, and containing calcium silicon barium zinc particle is added with stream in pouring molten steel, casting is thermally treated with after machining, can obtain
The high speed steel roll collar that must be had excellent performance, promoting and applying has good economic and social benefit.
But the various rollers set succeeded in developing at present is universal or that there are roll surface hardness is low, wears no resistance, or there are roller sets
The deficiency of brittleness greatly, easy to crack in use.
Summary of the invention
The purpose of the present invention is first poured composite roll and covers wear resistant outer layer, then, casting obdurability is good on centrifugal casting machine
And the roller set internal layer that casting character is excellent, castable, inside and outside layer realize good smelting under the action of the centrifugal force for outer layer and internal layer
Gold combines, and composite roll covers dense structure.Composite roll set of the present invention can be realized by following processing step:
1. melting composite roll covers in medium-frequency induction furnace cladding material and inner layer material respectively, the chemistry of cladding material
Composition and its mass fraction are 2.19-2.35%C, 0.82-0.97%B, 0.31-0.38%Al, 8.87-9.16%Cr, 3.57-
3.76%Mn, 0.52-0.58%Te, 0.15-0.23%Ce, 0.08-0.13%Ti, 0.05-0.11%N, 0.13-0.17%
Ca, 0.54-0.70%Si, < 0.035%P, < 0.032%S, surplus Fe；When the temperature of outer layer molten iron reaches 1462-1479 DEG C
When, first outer layer molten iron is poured into the high-speed rotating metal mold on horizontal centrifuge, the revolving speed of metal mold is 1020-
1060rpm, metal mold temperature are 213-239 DEG C, and metal mold inner surface is applied coated with the zirconium English powder of thickness 1.5-2.2mm
Material；After outer layer molten iron casting finishes 2-3 minutes, the internal surface temperature of outer layer is covered with non-contact type thermodetector measurement composite roll, when
When temperature is 1315-1345 DEG C, continue to be poured inner layer metal melt in the metal mold on centrifuge, inner layer metal melt
Chemical composition and its mass fraction are 1.41-1.57%C, 1.27-1.43%Si, 0.25-0.38%Mo, 0.77-0.94%Cr,
1.69-1.85%Mn, 0.008-0.013%B, 0.07-0.11%Y, 0.035-0.052Nb%, 0.035-0.052%Ti,
0.075%≤Ti+Nb≤0.095%, < 0.032%P, < 0.030%S, surplus Fe；The pouring temperature of inner layer metal melt is
1502-1519℃；Inner layer metal melt pours into during metal mold, and the inner layer metal accounted for into metal mold is added with stream and melts
The random inoculant of liquid quality 2.0-2.5%；The chemical composition and mass fraction of random inoculant are 46.13-48.69%Si,
1.08-1.44%Ti, 2.50-2.76%La, 3.51-3.75%Ca, 4.18-4.43%Ba, surplus Fe；When inner layer metal melt
Completely after solidification, centrifuge is shut down, and takes out roller from centrifuge and covers blank；
2. roller set blank carries out roughing after sand removal, polishing；Roller set after roughing is with stove heating to 1020-1035
DEG C, after heat preservation 150-180 minutes, coming out of the stove, it is air-cooled to carry out to roll surface, and when roll surface temperature is down to 350-400 DEG C, roller is inserted in furnace
After being reheated to 530-545 DEG C, heat preservation 480-550 minutes, temperature is furnace-cooled to lower than 120 DEG C, comes out of the stove and is air-cooled to room temperature, finally
It is refined to predetermined size and precision, can be obtained the composite roll set for pipe-mill.
The present invention is used for the composite roll set of pipe-mill, is produced using centre spinning method, the Gun Tao dense structure of acquisition.
The cladding material and inner layer material of composite roll set of the present invention, are respectively adopted melting in medium-frequency induction furnace, simple process, and metal melts
The ingredient and easy control of temperature of liquid.The chemical composition and its matter score of cladding material are 2.19-2.35%C, 0.82-0.97%
B, 0.31-0.38%Al, 8.87-9.16%Cr, 3.57-3.76%Mn, 0.52-0.58%Te, 0.15-0.23%Ce, 0.08-
0.13%Ti, 0.05-0.11%N, 0.13-0.17%Ca, 0.54-0.70%Si, < 0.035%P, < 0.032%S, surplus Fe.
Wherein, 0.82-0.97%B is added, primarily to obtaining the M of high rigidity2B is conducive to improve in composite roll set cladding material
The quantity of anti-abrasive hard tissue, to be conducive to improve wearability.In addition, 0.31-0.38%Al is added, M may advantageously facilitate2B's
Isolated distribution, so that it is guaranteed that roller set outer layer has good obdurability.Aluminium is non-carbide, boride formation element, is mainly consolidated
It is dissolved in metallic matrix, so as to significantly improve matrix high temperature hardness, promotes obviously mentioning for composite roll set outer layer high temperature abrasion resistance
It is high.
8.87-9.16%Cr, 3.57-3.76%Mn, 0.52-0.58%Te is added, can further improve roller set outer layer
Harden ability, improve roller cover wearability.0.15-0.23%Ce, 0.08-0.13%Ti, 0.05-0.11%N, 0.13- is added
0.17%Ca, acceptable further thinning solidification structure, improves the form of hard phase and field trash, and it is made to be evenly distributed, from
And be conducive to significantly improving for composite roll set outer layer obdurability.The present invention when the temperature of outer layer molten iron reaches 1462-1479 DEG C,
First outer layer molten iron is poured into the high-speed rotating metal mold on horizontal centrifuge, the revolving speed of metal mold is 1020-
1060rpm, metal mold temperature are 213-239 DEG C, and metal mold inner surface is applied coated with the zirconium English powder of thickness 1.5-2.2mm
Material, it is ensured that outer layer solidified structure is tiny, fine and close, and superficies are bright and clean.After outer layer molten iron casting finishes 2-3 minutes, connect with non-
Touch temperature measurer measures the internal surface temperature of composite roll set outer layer, when temperature is 1315-1345 DEG C, continues on centrifuge
It is poured inner layer metal melt in metal mold, may insure that internal layer and outer layer realize good metallurgical bonding in this way.Inner layer metal
The chemical composition and its matter score of melt are 1.41-1.57%C, 1.27-1.43%Si, 0.25-0.38%Mo, 0.77-
0.94%Cr, 1.69-1.85%Mn, 0.008-0.013%B, 0.07-0.11%Y, 0.035-0.052Nb%, 0.035-
0.052%Ti, 0.075%≤Ti+Nb≤0.095%, < 0.032%P, < 0.030%S, surplus Fe.In inner layer metal melt,
It, can containing 1.41-1.57%C, 1.27-1.43%Si, 0.25-0.38%Mo, 0.77-0.94%Cr and 1.69-1.85%Mn
To ensure that inner layer material has high intensity, and inner layer material good casting property, firm metallurgical junction may be implemented with cladding material
It closes.
In inner layer metal melt, also contain 0.008-0.013%B, 0.07-0.11%Y, 0.035-0.052Nb%,
0.035-0.052%Ti, 0.075%≤Ti+Nb≤0.095% can refine inner layer material solidified structure, improve inner layer material
Obdurability.In addition, the pouring temperature of inner layer metal melt is 1502-1519 DEG C, inner layer metal melt pours into metal mold process
In, it is added with stream and accounts for the random inoculant into the inner layer metal melt quality 2.0-2.5% of metal mold, random inoculant
Chemical composition and mass fraction are 46.13-48.69%Si, 1.08-1.44%Ti, 2.50-2.76%La, 3.51-3.75%
Ca, 4.18-4.43%Ba, surplus Fe, it can be ensured that after inner layer material solidification, brittle carbide will not be generated, but generated
Tiny point graphite, it is ensured that inner layer material has excellent comprehensive mechanical performance.
After inner layer metal melt solidifies completely, centrifuge is shut down, and takes out roller from centrifuge and covers blank, roller toison
Base carries out roughing after sand removal, polishing.Roller set after roughing, to 1020-1035 DEG C, and keeps the temperature 150-180 point with stove heating
Clock, it is air-cooled to roll surface progress after so that the pearlite complete austenitizing in roller set tissue, roller set is come out of the stove, prevent soft
Pearlitic structrure.When roll surface temperature is down to 350-400 DEG C, roller is inserted in furnace and is reheated to 530-545 DEG C, roller can be prevented
It covers cracked.After heat preservation 480-550 minutes, temperature is furnace-cooled to lower than 120 DEG C, comes out of the stove and is air-cooled to room temperature, can eliminate roller set
Internal stress, stabilizing tissue.Roller set is finally refined to predetermined size and precision, can be obtained the composite roll for pipe-mill
Set has excellent comprehensive performance.
Compared with prior art, the present invention having the advantage that
1, in composite roll of the present invention set, without alloying elements such as expensive vanadium, tungsten, nickel, cobalts, roller cover production cost compared with
It is low；
2, the smelting of composite roll set and casting of the present invention and heat treatment process are easy, it is easy to accomplish large-scale production；
3, composite roll set ectonexine of the present invention realizes good metallurgical bonding, and composite roll covers outer layer hardness height, is greater than
86HSD, uniformity of hardness is good, and roll surface difference of hardness is less than 1.8HSD, and roller covers outer layer tensile strength and is greater than 600MPa, and roller covers internal layer punching
Toughness is hit greater than 25J/cm2；
4, composite roll set of the present invention is used for pipe-mill, and use is safe and reliable, goes out in use without cracking, peeling phenomenon
Existing, service life improves 3 times or more than rich chromium cast iron roller set, and promoting and applying has good economic and social benefit.
Detailed description of the invention
Fig. 1 composite roll nested structure schematic diagram
1- outer layer；2- internal layer.
Specific embodiment
The present invention is further described with reference to embodiments, but the present invention is not limited to following embodiments.
Embodiment 1
It for the composite roll set of pipe-mill, is made of outer layer 1 and internal layer 2, outer layer 1 and internal layer 2 pass through centrifugal casting side
Method is combined into one, and composite roll set can be realized by following processing step:
1. 2 material of 1 material of outer layer and internal layer that melting composite roll covers in 500 kilograms of medium-frequency induction furnaces respectively, outer layer 1
The chemical composition and its mass fraction of material are 2.19%C, 0.97%B, 0.31%Al, 9.16%Cr, 3.57%Mn, 0.58%
Te, 0.15%Ce, 0.13%Ti, 0.11%N, 0.17%Ca, 0.54%Si, 0.033%P, 0.027%S, surplus Fe；When outer
When the temperature of 1 molten iron of layer reaches 1479 DEG C, 1 molten iron of outer layer is first poured into the high-speed rotating metal mold on horizontal centrifuge
Interior, the revolving speed of metal mold is 1020rpm, and metal mold temperature is 213 DEG C, and metal mold inner surface is coated with thickness 1.9-
The zircon flour coating of 2.2mm；After 1 molten iron casting of outer layer finishes 3 minutes, outer layer 1 is covered with non-contact type thermodetector measurement composite roll
Internal surface temperature it is molten to continue casting 2 metal of internal layer in metal mold on centrifuge when temperature is 1333-1345 DEG C
Liquid, the chemical composition and its matter score of 2 molten metal of internal layer are 1.57%C, 1.27%Si, 0.38%Mo, 0.77%Cr,
1.85%Mn, 0.008%B, 0.11%Y, 0.035Nb%, 0.052%Ti, 0.075%≤Ti+Nb≤0.095%, 0.031%
P, 0.022%S, surplus Fe；The pouring temperature of 2 molten metal of internal layer is 1519 DEG C；2 molten metal of internal layer pours into metal mold mistake
Cheng Zhong is added with stream and accounts for the random inoculant into the inner layer metal melt quality 2.5% of metal mold；The change of random inoculant
It learns composition and mass fraction is 48.69%Si, 1.08%Ti, 2.76%La, 3.51%Ca, 4.43%Ba, surplus Fe；Work as internal layer
After 2 molten metals solidify completely, centrifuge is shut down, and takes out roller from centrifuge and covers blank；
2. roller set blank carries out roughing after sand removal, polishing；Roller set after roughing, to 1020 DEG C, is kept the temperature with stove heating
After 180 minutes, coming out of the stove, it is air-cooled to carry out to roll surface, when roll surface temperature is down to 350-370 DEG C, roller is inserted in furnace and is reheated to
After 545 DEG C, heat preservation 480 minutes, be furnace-cooled to temperature lower than 120 DEG C, come out of the stove and be air-cooled to room temperature, be finally refined to predetermined size and
Precision, can be obtained the composite roll set for pipe-mill, and mechanical property is shown in Table 1.
Embodiment 2
It for the composite roll set of pipe-mill, is made of outer layer 1 and internal layer 2, outer layer 1 and internal layer 2 pass through centrifugal casting side
Method is combined into one, and composite roll set can be realized by following processing step:
1. 2 material of 1 material of outer layer and internal layer that melting composite roll covers in 750 kilograms of medium-frequency induction furnaces respectively, outer layer 1
The chemical composition and its matter score of material are 2.35%C, 0.82%B, 0.38%Al, 8.87%Cr, 3.76%Mn, 0.52%
Te, 0.23%Ce, 0.08%Ti, 0.05%N, 0.13%Ca, 0.70%Si, 0.030%P, 0.031%S, surplus Fe；When outer
When the temperature of 1 molten iron of layer reaches 1462 DEG C, 1 molten iron of outer layer is first poured into the high-speed rotating metal mold on horizontal centrifuge
Interior, the revolving speed of metal mold is 1020rpm, and metal mold temperature is 239 DEG C, and metal mold inner surface is coated with thickness 1.5-
The zircon flour coating of 1.7mm；After 1 molten iron casting of outer layer finishes 2 minutes, outer layer 1 is covered with non-contact type thermodetector measurement composite roll
Internal surface temperature it is molten to continue casting 2 metal of internal layer in metal mold on centrifuge when temperature is 1315-1324 DEG C
Liquid, the chemical composition and its matter score of 2 molten metal of internal layer are 1.41%C, 1.43%Si, 0.25%Mo, 0.94%Cr,
1.69%Mn, 0.013%B, 0.07%Y, 0.052Nb%, 0.035%Ti, 0.075%≤Ti+Nb≤0.095%, 0.028%
P, 0.027%S, surplus Fe；The pouring temperature of 2 molten metal of internal layer is 1502 DEG C；2 molten metal of internal layer pours into metal mold mistake
Cheng Zhong is added with stream and accounts for the random inoculant into the inner layer metal melt quality 2.0% of metal mold；The change of random inoculant
It learns composition and mass fraction is 46.13%Si, 1.44%Ti, 2.50%La, 3.75%Ca, 4.18%Ba, surplus Fe；Work as internal layer
After 2 molten metals solidify completely, centrifuge is shut down, and takes out roller from centrifuge and covers blank；
2. roller set blank carries out roughing after sand removal, polishing；Roller set after roughing, to 1035 DEG C, is kept the temperature with stove heating
After 150 minutes, coming out of the stove, it is air-cooled to carry out to roll surface, when roll surface temperature is down to 385-400 DEG C, roller is inserted in furnace and is reheated to
After 530 DEG C, heat preservation 480 minutes, be furnace-cooled to temperature lower than 120 DEG C, come out of the stove and be air-cooled to room temperature, be finally refined to predetermined size and
Precision, can be obtained the composite roll set for pipe-mill, and mechanical property is shown in Table 1.
Embodiment 3
It for the composite roll set of pipe-mill, is made of outer layer 1 and internal layer 2, outer layer 1 and internal layer 2 pass through centrifugal casting side
Method is combined into one, and composite roll set can be realized by following processing step:
1. 2 material of 1 material of outer layer and internal layer that melting composite roll covers in 1000 kilograms of medium-frequency induction furnaces respectively, outer layer
The chemical composition and its matter score of 1 material are 2.27%C, 0.88%B, 0.36%Al, 9.05%Cr, 3.63%Mn, 0.55%
Te, 0.19%Ce, 0.11%Ti, 0.08%N, 0.14%Ca, 0.63%Si, 0.029%P, 0.021%S, surplus Fe；When outer
When the temperature of 1 molten iron of layer reaches 1470 DEG C, 1 molten iron of outer layer is first poured into the high-speed rotating metal mold on horizontal centrifuge
Interior, the revolving speed of metal mold is 1050rpm, and metal mold temperature is 224 DEG C, and metal mold inner surface is coated with thickness 1.7-
The zircon flour coating of 1.9mm；After 1 molten iron casting of outer layer finishes 2.5 minutes, outer layer is covered with non-contact type thermodetector measurement composite roll
It is molten to continue casting 2 metal of internal layer in the metal mold on centrifuge when temperature is 1322-1331 DEG C for 1 internal surface temperature
Liquid, the chemical composition and its matter score of 2 molten metal of internal layer are 1.46%C, 1.30%Si, 0.29%Mo, 0.85%Cr,
1.77%Mn, 0.009%B, 0.08%Y, 0.046Nb%, 0.040%Ti, 0.075%≤Ti+Nb≤0.095%, 0.026%
P, 0.019%S, surplus Fe；The pouring temperature of 2 molten metal of internal layer is 1508 DEG C；2 molten metal of internal layer pours into metal mold mistake
Cheng Zhong is added with stream and accounts for the random inoculant into the inner layer metal melt quality 2.2% of metal mold；The change of random inoculant
It learns composition and mass fraction is 47.54%Si, 1.27%Ti, 2.59%La, 3.65%Ca, 4.27%Ba, surplus Fe；Work as internal layer
After 2 molten metals solidify completely, centrifuge is shut down, and takes out roller from centrifuge and covers blank；
2. roller set blank carries out roughing after sand removal, polishing；Roller set after roughing, to 1030 DEG C, is kept the temperature with stove heating
After 160 minutes, coming out of the stove, it is air-cooled to carry out to roll surface, when roll surface temperature is down to 370-390 DEG C, roller is inserted in furnace and is reheated to
After 540 DEG C, heat preservation 520 minutes, be furnace-cooled to temperature lower than 120 DEG C, come out of the stove and be air-cooled to room temperature, be finally refined to predetermined size and
Precision, can be obtained the composite roll set for pipe-mill, and mechanical property is shown in Table 1.
1 composite roll of table covers mechanical property
In composite roll of the present invention set, without alloying elements such as expensive vanadium, tungsten, nickel, cobalts, roller cover production cost compared with
It is low.Composite roll set ectonexine of the present invention realizes good metallurgical bonding, and composite roll covers outer layer hardness height, is greater than 86HSD, hardness
Uniformity is good, and roll surface difference of hardness is less than 1.8HSD, and roller covers outer layer tensile strength and is greater than 600MPa, and roller set internal layer impact flexibility is greater than
25J/cm2.Composite roll set of the present invention is used for pipe-mill, and use is safe and reliable, goes out in use without cracking, peeling phenomenon
Existing, service life improves 3 times or more than rich chromium cast iron roller set, and using composite roll set of the present invention, pipe-mill operation can be improved
Rate mitigates labor intensity of workers, reduces steel pipe's production cost, and promoting and applying has good economic and social benefit.
Claims (2)
1. a kind of preparation method that the composite roll for pipe-mill covers, which comprises the following steps:
1. melting composite roll covers in medium-frequency induction furnace cladding material and inner layer material respectively, the chemical composition of cladding material
And its mass fraction is 2.19-2.35%C, 0.82-0.97%B, 0.31-0.38%Al, 8.87-9.16%Cr, 3.57-
3.76%Mn, 0.52-0.58%Te, 0.15-0.23%Ce, 0.08-0.13%Ti, 0.05-0.11%N, 0.13-0.17%
Ca, 0.54-0.70%Si, < 0.035%P, < 0.032%S, surplus Fe；When the temperature of outer layer molten iron reaches 1462-1479 DEG C
When, first outer layer molten iron is poured into the high-speed rotating metal mold on horizontal centrifuge, the revolving speed of metal mold is 1020-
1060rpm, metal mold temperature are 213-239 DEG C, and metal mold inner surface is applied coated with the zirconium English powder of thickness 1.5-2.2mm
Material；After outer layer molten iron casting finishes 2-3 minutes, the internal surface temperature of outer layer is covered with non-contact type thermodetector measurement composite roll, when
When temperature is 1315-1345 DEG C, continue to be poured inner layer metal melt in the metal mold on centrifuge, inner layer metal melt
Chemical composition and its mass fraction are 1.41-1.57%C, 1.27-1.43%Si, 0.25-0.38%Mo, 0.77-0.94%Cr,
1.69-1.85%Mn, 0.008-0.013%B, 0.07-0.11%Y, 0.035-0.052Nb%, 0.035-0.052%Ti,
0.075%≤Ti+Nb≤0.095%, < 0.032%P, < 0.030%S, surplus Fe；The pouring temperature of inner layer metal melt is
1502-1519℃；Inner layer metal melt pours into during metal mold, and the inner layer metal accounted for into metal mold is added with stream and melts
The random inoculant of liquid quality 2.0-2.5%；The chemical composition and mass fraction of random inoculant are 46.13-48.69%Si,
1.08-1.44%Ti, 2.50-2.76%La, 3.51-3.75%Ca, 4.18-4.43%Ba, surplus Fe；When inner layer metal melt
Completely after solidification, centrifuge is shut down, and takes out roller from centrifuge and covers blank；
2. roller set blank carries out roughing after sand removal, polishing；Roller set after roughing, to 1020-1035 DEG C, is protected with stove heating
After 150-180 minutes warm, coming out of the stove, it is air-cooled to carry out to roll surface, when roll surface temperature is down to 350-400 DEG C, roller is inserted in furnace and is added again
Heat is to 530-545 DEG C, after heat preservation 480-550 minutes, is furnace-cooled to temperature lower than 120 DEG C, comes out of the stove and be air-cooled to room temperature, finally finish
To predetermined size and precision, the composite roll set for pipe-mill can be obtained.
2. the composite roll set for pipe-mill that preparation method described in accordance with the claim 1 is prepared.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811421483.7A CN109317520B (en) | 2018-11-23 | 2018-11-23 | Composite roll sleeve for steel tube rolling mill and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811421483.7A CN109317520B (en) | 2018-11-23 | 2018-11-23 | Composite roll sleeve for steel tube rolling mill and manufacturing method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109317520A true CN109317520A (en) | 2019-02-12 |
| CN109317520B CN109317520B (en) | 2019-12-20 |
Family
ID=65257508
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811421483.7A Active CN109317520B (en) | 2018-11-23 | 2018-11-23 | Composite roll sleeve for steel tube rolling mill and manufacturing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109317520B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112496284A (en) * | 2020-10-26 | 2021-03-16 | 无锡天德金属制品有限公司 | Process application technology for sleeving superhard high-heat-conductivity casting roller on aluminum alloy thin strip |
| CN114774627A (en) * | 2022-04-12 | 2022-07-22 | 遂昌德鑫铸钢有限公司 | Special additive for high-chromium wear-resistant castings |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH051350A (en) * | 1990-11-21 | 1993-01-08 | Kawasaki Steel Corp | Roll external layer material for rolling |
| JPH08325673A (en) * | 1995-05-31 | 1996-12-10 | Yodogawa Steel Works Ltd | Composite roll for rolling excellent in wear resistance, surface roughening resistance and the like |
| CN1350890A (en) * | 2000-10-26 | 2002-05-29 | 王明家 | Sleeved roller with high-alloy composite sleeve and three structure layers |
| CN101018880A (en) * | 2004-09-13 | 2007-08-15 | 日立金属株式会社 | Centrifugally cast external layer for rolling roll and method for manufacture thereof |
| CN101831590A (en) * | 2009-03-10 | 2010-09-15 | 江苏东冶轧辊有限公司 | High-boron low-alloy high-speed steel roll and preparation method thereof |
| CN102962423A (en) * | 2012-11-28 | 2013-03-13 | 江苏共昌轧辊股份有限公司 | Centrifugal high-carbon, high-boron and high-speed steel composite roller shell and fabrication method of combined roller of composite roller shell |
| CN105316590A (en) * | 2015-11-13 | 2016-02-10 | 丹阳嘉伟耐磨材料科技有限公司 | High-tenacity boron-containing high-speed steel and preparation method thereof |
-
2018
- 2018-11-23 CN CN201811421483.7A patent/CN109317520B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH051350A (en) * | 1990-11-21 | 1993-01-08 | Kawasaki Steel Corp | Roll external layer material for rolling |
| JPH08325673A (en) * | 1995-05-31 | 1996-12-10 | Yodogawa Steel Works Ltd | Composite roll for rolling excellent in wear resistance, surface roughening resistance and the like |
| CN1350890A (en) * | 2000-10-26 | 2002-05-29 | 王明家 | Sleeved roller with high-alloy composite sleeve and three structure layers |
| CN101018880A (en) * | 2004-09-13 | 2007-08-15 | 日立金属株式会社 | Centrifugally cast external layer for rolling roll and method for manufacture thereof |
| CN101831590A (en) * | 2009-03-10 | 2010-09-15 | 江苏东冶轧辊有限公司 | High-boron low-alloy high-speed steel roll and preparation method thereof |
| CN102962423A (en) * | 2012-11-28 | 2013-03-13 | 江苏共昌轧辊股份有限公司 | Centrifugal high-carbon, high-boron and high-speed steel composite roller shell and fabrication method of combined roller of composite roller shell |
| CN105316590A (en) * | 2015-11-13 | 2016-02-10 | 丹阳嘉伟耐磨材料科技有限公司 | High-tenacity boron-containing high-speed steel and preparation method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112496284A (en) * | 2020-10-26 | 2021-03-16 | 无锡天德金属制品有限公司 | Process application technology for sleeving superhard high-heat-conductivity casting roller on aluminum alloy thin strip |
| CN114774627A (en) * | 2022-04-12 | 2022-07-22 | 遂昌德鑫铸钢有限公司 | Special additive for high-chromium wear-resistant castings |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109317520B (en) | 2019-12-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103624084B (en) | Resource-saving type high-boron high-speed steel composite roll and manufacturing method thereof | |
| CN105618715B (en) | A kind of wear-resistant high speed steel composite roll and preparation method thereof | |
| CN105750529B (en) | A kind of high tungsten high abrasion compound high speed steel roll and preparation method thereof | |
| CN102962423B (en) | Centrifugal high-carbon, high-boron and high-speed steel composite roller shell and fabrication method of combined roller of composite roller shell | |
| CN101705430B (en) | High-speed steel roll and preparation method thereof by centrifugal compounding in electromagnetic field | |
| CN103866200B (en) | High-boron high-speed steel combined roller and manufacturing method thereof | |
| CN105779861B (en) | A kind of wear-resisting high vanadium nitrogen high-speed steel shaped roll and its manufacture method | |
| CN108754068B (en) | High-speed steel roll collar for high-speed wire pre-finish rolling and preparation method thereof | |
| CN105522138B (en) | A kind of forged steel roll neck rich chromium cast iron composite roll Processes and apparatus | |
| CN104384193A (en) | High speed steel finishing roll of wire bar mill and manufacturing method of high speed steel finishing roll | |
| CN105312541B (en) | Nickel-chrome-molybdenum alloy cast iron composite roll manufacturing process and equipment in a kind of modified forged steel roll neck | |
| CN105397067B (en) | Forged steel roll neck alloy nodular cast iron composite roll manufacturing process and equipment | |
| CN106222530A (en) | A kind of centrifugal casting rich chromium cast iron collars and preparation method | |
| CN102689161A (en) | Liquid die-forging and rolling combined forming method for 7075 aluminum alloy irregular-section large-size annular piece | |
| CN103691903A (en) | Manufacturing process for centrifugal casting of multi-element eutectic high-alloy rolls | |
| CN112322970A (en) | High-chromium steel composite roll collar and manufacturing method thereof | |
| CN109317520A (en) | Composite roll set and its manufacturing method for pipe-mill | |
| CN106544596A (en) | A kind of aluminium alloying high-boron high-speed steel composite roller and preparation method thereof | |
| CN111945055B (en) | Boron-added high-speed steel roll collar and preparation method thereof | |
| CN109482654A (en) | For Kocks milling train composite ring and its manufacturing method | |
| CN107574362A (en) | A kind of antifriction alloy composite ring and its manufacture method, manufacture device | |
| CN104250712A (en) | Method for manufacturing large-size, high-toughness and wear-resistant alloy roller | |
| CN102628147B (en) | High-sulfur alloy steel roll and production method | |
| CN111101062A (en) | high-Nb high-speed steel roll for centrifugal composite casting with improved hot rolling and preparation method thereof | |
| CN116334483A (en) | Reducing roller collar based on steel tube rolling mill and manufacturing method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |