CN108015109A - A kind of high-speed steel combines edger roll - Google Patents
A kind of high-speed steel combines edger roll Download PDFInfo
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- CN108015109A CN108015109A CN201711298232.XA CN201711298232A CN108015109A CN 108015109 A CN108015109 A CN 108015109A CN 201711298232 A CN201711298232 A CN 201711298232A CN 108015109 A CN108015109 A CN 108015109A
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- 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
- B21B27/032—Rolls for sheets or strips
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D13/00—Centrifugal casting; Casting by using centrifugal force
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D19/00—Casting in, on, or around objects which form part of the product
- B22D19/16—Casting in, on, or around objects which form part of the product for making compound objects cast of two or more different metals, e.g. for making rolls for rolling mills
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P19/00—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes
-
- 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
- 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
- C22C38/56—Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.7% by weight of carbon
-
- 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
- C22C38/60—Ferrous alloys, e.g. steel alloys containing lead, selenium, tellurium, or antimony, or more than 0.04% by weight of sulfur
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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)
- Geometry (AREA)
- Heat Treatment Of Steel (AREA)
- Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
Abstract
The invention discloses a kind of high-speed steel to combine edger roll, belongs to steel manufacture field, including roller set and mandrel, its central roll set includes outer layer and core, and the material of outer layer is high-speed steel, and the material of core is graphitic steel；The material of mandrel is forged steel.High-speed steel combination edger roll prepared by the present invention, wearability is high, and roll change cycle length, reduces the number of operations that relatively complicated edger roll is replaced, be obviously improved the continuity and production efficiency of steel rolling operation；High-speed steel combination edger roll prepared by the present invention, hence it is evident that improve steel edge portion quality, reduce the trimming amount during producing line processing of downstream, yield of steel plate significantly improves, and the smooth nothing of roll surface plays knurl phenomenon after machine under edger roll.
Description
Technical field
The present invention relates to equipment of hot rolling, especially a kind of combination edger roll, belongs to steel manufacture field.
Background technology
Edger roll is a part for rolling mill for hot rolled planks and strips, and main function is to slab de-scaling and side rolling；Slab is through side
It after rolling, can prevent rolled piece edge from producing cydariform, and the width specifications of band can be adjusted, so as to obtain even width, edge
Neat band.Rolling mill for hot rolled planks and strips edger roll generally uses alloy cast steel, half steel and forged steel material, these materials both at home and abroad at present
Because carbide content is few in tissue, matrix microhardness is low, the control of roll macrohardness is relatively low, generally controls in 40~50HS.
In use there is wearability, hot-cracking resistance, resistance to compression trace scarce capacity, roll changing period is short, and it is all that wear extent is big etc.
More problems, have impact on stocking quality of edges, cause stocking burr, side to split, black line the problems such as, cannot gradually meet rolling line
Demand.
In addition, the characteristics of vertical miller is that roll change, dismounting, installation time are longer, heavy workload takes that personnel are more, consuming
Time is grown.Roll change it is few want 4~5 it is small when, more reaches more than ten hour, and disassembly and assembly time is longer, it is sometimes desirable to 2~3 talentes
One can be installed, significantly impacts the operating efficiency at steel rolling scene, therefore, the further of edger roll roll change cycle is pursued and extends to rolling
The lifting of steel operating rate is significant.
The content of the invention
The technical problem to be solved in the invention is to provide a kind of high-speed steel combination edger roll, is suitable for tropical rolling machine edger roll
Use so that edger roll wearability greatly improves, and the roll change cycle increases, and improves belt steel rolling efficiency, reduces roller consumption, realizes green
Production.
In order to solve the above technical problems, the technical solution adopted in the present invention is：
A kind of high-speed steel combines edger roll, including roller set and mandrel, and roller set includes outer layer and core, and the material of outer layer is at a high speed
Steel, the material of core is graphitic steel；The material of the mandrel is forged steel.
Technical solution of the present invention further improvement lies in that：The chemical constituent and the percentage of each component that the high-speed steel includes
Content is C0.80~2.00%, Si0.50~1.50%, Mn0.20~1.20%, P≤0.08%, S≤0.05%, Cr3.00
~8.00%, Ni0.50~1.50%, Mo2.00~5.00%, V1.00~3.00%, W0.50~2.50%.
Technical solution of the present invention further improvement lies in that preparation process is as follows：Roller set and mandrel are first prepared respectively, then will
Roller set is preheated, kept the temperature, and roller set then is carried out hot charging with mandrel.
Technical solution of the present invention further improvement lies in that：The preheating temperature is 300~450 DEG C, and the time of insulation is 3
~6h.
Technical solution of the present invention further improvement lies in that：Roller set is connected into luggage with mandrel by interference during the hot charging
Match somebody with somebody.
Technical solution of the present invention further improvement lies in that roller set preparation process it is as follows：
A. outer layer molten steel and core molten steel are smelted respectively, first outer layer molten steel are poured on centrifugation machine casting mold, outer layer molten steel
Core molten steel is poured into after 4~7min of solidification, is demoulded after centrifuging 2~3h；
B. then slow cooling after the roller set demoulding is gone out groove, processing, carry out carrying out flaw detection to 100 DEG C below；
C. the roller set of carrying out flaw detection qualification is loaded high temperature resistance furnace to be heated, then keeps the temperature 2~8h；
D. air-cooled after keeping the temperature, temperature loads low-temperature resistance stove after being down to 300~450 DEG C and carries out three sections of tempers.
Technical solution of the present invention further improvement lies in that：The smelting outer layer molten steel and core molten steel are to utilize intermediate frequency furnace
Carry out, temperature when smelting outer layer molten steel is 1500~1600 DEG C, and temperature when smelting core molten steel is 1450~1550 DEG C.
Technical solution of the present invention further improvement lies in that：The centrifuge is vertical centrifugal machine, rotating speed for 300~
500rpm。
Technical solution of the present invention further improvement lies in that：The carrying out flaw detection detects for ultrasonic flaw detection, heating
Temperature is 1000~1150 DEG C.
Technical solution of the present invention further improvement lies in that：Each section of temper step of three sections of tempers be
Edger roll is heated to 450~600 DEG C, then keeps the temperature 30~40h, is then air-cooled to room temperature.
By adopting the above-described technical solution, the technological progress that the present invention obtains is：
High-speed steel combination edger roll prepared by the present invention, wearability is high, and roll change cycle length, reduces roll change number, significantly carry
The continuity and production efficiency of steel rolling operation are risen；High-speed steel combination edger roll prepared by the present invention, hence it is evident that improve steel edge portion
Quality, reduces the trimming amount during processing of downstream producing line, and yield of steel plate significantly improves, and the smooth nothing of roll surface after machine under edger roll
Play knurl phenomenon.
The high-speed steel combination edger roll of the present invention uses compound bushing technology, realizes edger roll on-line rolling service life and surface matter
Amount greatly improves.Edger roll includes roller set and mandrel, its central roll set includes outer layer and core two parts again, and outer layer material is at a high speed
Steel, core material are graphitic steel, not only ensure that the strong hardness of edger roll, but also save cost of material；The high speed steel material of outer layer is resistance to
Mill property be traditional half steel, alloy cast steel, more than 4 times of forged steel material, be high chrome combination more than 2 times of edger roll；The core of edger roll
Axis uses forged steel material, meets the requirement of obdurability.
The present invention smelts the outer layer and core molten steel of roller set using intermediate frequency furnace, compared with other Casting Equipments, has heat
It is efficient, smelting time is short, alloying element scaling loss is few, environmental pollution is small, can accurately control temperature and component of molten metal etc.
Advantage.
The roller set of high-speed steel combination edger roll of the present invention is prepared using centre spinning method, is saved raw material and energy consumption, is obtained
The roller set of high quality.The present invention carries out the preparation of roller set using vertical centrifugal-casting machine, in the range of speeds of 300~500rpm
It is interior, successively outer layer and core molten steel are poured into centrifugal casting machine, fill type and solidification, 4~7min outer layers under the action of the centrifugal force
Molten steel can solidify, and 2~3h outer layers are combined and solidified with core, and metal feeding effect is good, and roller covers the dense structure of casting, machinery
Performance is good, and molten steel Utilization rate is high.
Heat treatment method after the roller set demoulding of high-speed steel combination edger roll of the present invention so that the hardness increase of roller set, it is wear-resisting
Property improve.First slow cooling after the edger roll demoulding, then high temperature resistance furnace heating and thermal insulation handle, it is air-cooled afterwards, last low-temperature resistance stove into
Three sections of tempering of row and isothermal holding, in the condition and ranges such as suitable temperature, improve the hardness and wear resistance of roller set, eliminate
The internal stress of roller set.
The roller set of high-speed steel combination edger roll of the present invention is assembled with mandrel by the way of interference is connected, such a assembling side
Formula causes roller set to be completely embedded, accurately with mandrel, and can bear axial force, and the stability of edger roll is good.
High-speed steel combination edger roll on-line rolling time length prepared by the present invention, roll change cycle length, production efficiency are high.The present invention
High-speed steel combination the edger roll on-line rolling cycle be promoted to 60 days or so by 15 days or so of alloy cast steel material, be high chrome group
2 times of 30 days roll change cycles of edger roll are closed, lower machine wear extent and stock removal just correspond to the 50% of traditional material, reduce roller consumption,
Realize green production.
Brief description of the drawings
Fig. 1 is the roller set outer tissue 500X metallographs of high-speed steel combination edger roll of the present invention.
Embodiment
The present invention is described in further details with reference to embodiment：
A kind of high-speed steel combines edger roll, including roller set and mandrel.Its central roll set includes outer layer and core, and the material of outer layer is
High-speed steel, the chemical constituent and the percentage composition of each component that high-speed steel includes are C0.80~2.00%, Si0.50~1.50%,
Mn0.20~1.20%, P≤0.08%, S≤0.05%, Cr3.00~8.00%, Ni0.50~1.50%, Mo2.00~
5.00%, V1.00~3.00%, W0.50~2.50%, surplus are Fe and inevitable impurity, and the material of core is graphite
Steel, the material of mandrel is forged steel.
High-speed steel combination edger roll preparation process be：Roller set and mandrel are first prepared respectively, then roller set is preheated, then
The roller set of preheating is subjected to hot charging with mandrel.
The roller set of wherein high-speed steel combination edger roll is produced using centrifugal composite casting mode, its preparation process is as follows：
A. outer layer and core molten steel are smelted respectively using intermediate frequency furnace, temperature when smelting outer layer molten steel is 1500~1600
DEG C, temperature when smelting core molten steel is 1450~1550 DEG C；First outer layer molten steel is poured on centrifugation machine casting mold, outer layer molten steel
Core molten steel is poured into after 4~7min of solidification, centrifuge stops operating after 2~3h, and wherein centrifuge is vertical centrifugal machine, and rotating speed is
300~500rpm；
B. then the roller set demoulding, slow cooling process to groove is gone out after less than 100 DEG C, carry out ultrasonic flaw detection detection, confirmation
Bonding layer quality has no problem；
C. the roller set of carrying out flaw detection qualification being loaded high temperature resistance furnace to be heated, heating-up temperature is 1000~1150 DEG C,
And 2~8h is kept the temperature at this temperature；
D. air-cooled after keeping the temperature, temperature loads low-temperature resistance stove after being down to 300~450 DEG C and carries out three sections of tempers,
Each section of temper step of three sections of tempers is that edger roll is heated to 450~600 DEG C, then keeps the temperature 30~40h, Ran Houkong
It is cooled to room temperature；
The roller set that will be cooled to room temperature first preheats, and preheating temperature is 300~450 DEG C, and keeps the temperature 3~6h at this temperature,
Then it is connected with mandrel by interference and carries out hot charging, finished product is machined to by edger roll is combined according to drawing requirement after room temperature is cooled to.
Embodiment 1
A kind of high-speed steel combines edger roll, including roller set and mandrel.Its central roll set includes outer layer and core, and the material of outer layer is
High-speed steel, the chemical constituent and the percentage composition of each component that high-speed steel includes are shown in Table 1, and the material of core is graphitic steel, mandrel
Material is forged steel.
High-speed steel combination edger roll preparation process be：Roller set and mandrel are first prepared respectively, then roller set is preheated, then
The roller set of preheating is subjected to hot charging with mandrel.
The roller set of wherein high-speed steel combination edger roll is produced using centrifugal composite casting mode, its preparation process is as follows：
A. outer layer and core molten steel are smelted respectively using intermediate frequency furnace, temperature when smelting outer layer molten steel is 1500 DEG C, is smelted
Temperature during core molten steel is 1450 DEG C；First outer layer molten steel is poured on centrifugation machine casting mold, is poured after outer layer molten steel solidification 4min
Enter core molten steel, centrifuge stops operating after 3h, and wherein centrifuge is vertical centrifugal machine, rotating speed 300rpm；
B. then the roller set demoulding, slow cooling process to groove is gone out after 90 DEG C, carry out carrying out flaw detection, confirm bonding layer quality whether there is
Problem；
C. the roller set of carrying out flaw detection qualification being loaded high temperature resistance furnace to be heated, heating-up temperature is 1000 DEG C, and herein
At a temperature of keep the temperature 8h；
D. air-cooled after keeping the temperature, temperature loads low-temperature resistance stove after being down to 300 DEG C and carries out three sections of tempers, first segment
The temperature of tempering is 450 DEG C, and tempering time 30h, is then air-cooled to room temperature, and the temperature of second and third section of tempering is 600 DEG C, is returned
The fiery time is 40h, and room temperature is air-cooled to after tempering insulation.
The roller set that temper is completed first preheats, and preheating temperature is 300 DEG C, and keeps the temperature 6h at this temperature, Ran Houyu
Mandrel is connected by interference and carries out hot charging, and finished product is machined to by edger roll is combined according to drawing requirement after room temperature is cooled to.
The roller set outer tissue of high-speed steel combination edger roll is as shown in Figure 1,500X metallographic structure figures show that outer tissue is carbon
Compound+martensite.
Embodiment 2
A kind of high-speed steel combines edger roll, including roller set and mandrel.Its central roll set includes outer layer and core, and the material of outer layer is
High-speed steel, the chemical constituent and the percentage composition of each component that high-speed steel includes are shown in Table 1, and the material of core is graphitic steel, mandrel
Material is forged steel.
High-speed steel combination edger roll preparation process be：Roller set and mandrel are first prepared respectively, then roller set is preheated, then
The roller set of preheating is subjected to hot charging with mandrel.
The roller set of wherein high-speed steel combination edger roll is produced using centrifugal composite casting mode, its preparation process is as follows：
A. outer layer and core molten steel are smelted respectively using intermediate frequency furnace, temperature when smelting outer layer molten steel is 1600 DEG C, is smelted
Temperature during core molten steel is 1550 DEG C；First outer layer molten steel is poured on centrifugation machine casting mold, is poured after outer layer molten steel solidification 7min
Enter core molten steel, centrifuge stops operating after 2h, and wherein centrifuge is vertical centrifugal machine, rotating speed 500rpm；
B. then the roller set demoulding, slow cooling process to groove is gone out after 80 DEG C, carry out carrying out flaw detection, confirm bonding layer quality whether there is
Problem；
C. the roller set of carrying out flaw detection qualification being loaded high temperature resistance furnace to be heated, heating-up temperature is 1150 DEG C, and herein
At a temperature of keep the temperature 2h；
D. air-cooled after keeping the temperature, temperature loads low-temperature resistance stove after being down to 450 DEG C and carries out three sections of tempers, first segment
The temperature of temper is 470 DEG C, and tempering time 32h, is then air-cooled to room temperature, the tempering temperature of second and third section of temper
Spend for 430 DEG C, tempering time 38h, room temperature is air-cooled to after tempering insulation.
The roller set that temper is completed first preheats, and preheating temperature is 450 DEG C, and keeps the temperature 3h at this temperature, Ran Houyu
Mandrel is connected by interference and carries out hot charging, and finished product is machined to by edger roll is combined according to drawing requirement after room temperature is cooled to.
The roller set outer tissue of high-speed steel combination edger roll is as shown in Figure 1,500X metallographic structure figures show that outer tissue is carbon
Compound+martensite.
Embodiment 3
A kind of high-speed steel combines edger roll, including roller set and mandrel.Its central roll set includes outer layer and core, and the material of outer layer is
High-speed steel, the chemical constituent and the percentage composition of each component that high-speed steel includes are shown in Table 1, and the material of core is graphitic steel, mandrel
Material is forged steel.
High-speed steel combination edger roll preparation process be：Roller set and mandrel are first prepared respectively, then roller set is preheated, then
The roller set of preheating is subjected to hot charging with mandrel.
The roller set of wherein high-speed steel combination edger roll is produced using centrifugal composite casting mode, its preparation process is as follows：
A. outer layer and core molten steel are smelted respectively using intermediate frequency furnace, temperature when smelting outer layer molten steel is 1580 DEG C, is smelted
Temperature during core molten steel is 1520 DEG C；First outer layer molten steel is poured on centrifugation machine casting mold, after outer layer molten steel solidification 6min10s
Core molten steel is poured into, centrifuge stops operating after 2h, and wherein centrifuge is vertical centrifugal machine, rotating speed 380rpm；
B. then the roller set demoulding, slow cooling process to groove is gone out after less than 50 DEG C, carry out carrying out flaw detection, confirmation bonding layer quality
There is no problem；
C. the roller set of carrying out flaw detection qualification being loaded high temperature resistance furnace to be heated, heating-up temperature is 1100 DEG C, and herein
At a temperature of keep the temperature 3h；
D. air-cooled after keeping the temperature, temperature loads low-temperature resistance stove after being down to 380 DEG C and carries out three sections of tempers, first segment
The temperature of temper is 490 DEG C, and tempering time 30h, is then air-cooled to room temperature, the tempering temperature of second and third section of temper
Spend for 520 DEG C, tempering time 38h, room temperature is air-cooled to after tempering insulation.
The roller set that temper is completed first preheats, and preheating temperature is 300 DEG C, and keeps the temperature 4h at this temperature, Ran Houyu
Mandrel is connected by interference and carries out hot charging, and finished product is machined to by edger roll is combined according to drawing requirement after room temperature is cooled to.
The roller set outer tissue of high-speed steel combination edger roll is as shown in Figure 1,500X metallographic structure figures show that outer tissue is carbon
Compound+martensite.
Embodiment 4
A kind of high-speed steel combines edger roll, including roller set and mandrel.Its central roll set includes outer layer and core, and the material of outer layer is
High-speed steel, the chemical constituent and the percentage composition of each component that high-speed steel includes are shown in Table 1, and the material of core is graphitic steel, mandrel
Material is forged steel.
High-speed steel combination edger roll preparation process be：Roller set and mandrel are first prepared respectively, then roller set is preheated, then
The roller set of preheating is subjected to hot charging with mandrel.
The roller set of wherein high-speed steel combination edger roll is produced using centrifugal composite casting mode, its preparation process is as follows：
A. outer layer and core molten steel are smelted respectively using intermediate frequency furnace, temperature when smelting outer layer molten steel is 1540 DEG C, is smelted
Temperature during core molten steel is 1550 DEG C；First outer layer molten steel is poured on centrifugation machine casting mold, is poured after outer layer molten steel solidification 5min
Enter core molten steel, centrifuge stops operating after 2.5h, and wherein centrifuge is vertical centrifugal machine, and rotating speed is 300~500rpm；
B. then the roller set demoulding, slow cooling process to groove is gone out after 75 DEG C, carry out carrying out flaw detection, confirm bonding layer quality whether there is
Problem；
C. the roller set of carrying out flaw detection qualification being loaded high temperature resistance furnace to be heated, heating-up temperature is 1090 DEG C, and herein
At a temperature of keep the temperature 5h；
D. air-cooled after keeping the temperature, temperature loads low-temperature resistance stove after being down to 400 DEG C and carries out three sections of tempers, first segment
The temperature of temper is 490 DEG C, and tempering time 34h, is then air-cooled to room temperature, time of second and third section of temper
Fiery temperature is 570 DEG C, tempering time 36h, and room temperature is air-cooled to after tempering insulation.
The roller set that temper is completed first preheats, and preheating temperature is 400 DEG C, and keeps the temperature 5h at this temperature, Ran Houyu
Mandrel is connected by interference and carries out hot charging, and finished product is machined to by edger roll is combined according to drawing requirement after room temperature is cooled to.
The roller set outer tissue of high-speed steel combination edger roll is as shown in Figure 1,500X metallographic structure figures show that outer tissue is carbon
Compound+martensite.
Check experiment 1
This check experiment is the check experiment of embodiment 3, and preparation process is as follows：
A kind of half steel combines edger roll, including roller set and mandrel.The material of roller set is half steel, chemical constituent that half steel includes and
The percentage composition of each component is shown in Table 1, and the material of mandrel is forged steel.
Half steel combination edger roll preparation process be：According to the chemical constituent and content dispensing of half steel, intermediate frequency furnace is then utilized
Roller sleeve steel water is smelted, temperature is 1580 DEG C when smelting roller sleeve steel water, and roller sleeve steel water is poured into mold, solidifies 1.5h, then takes off
Then mould, slow cooling are processed to groove is gone out after 50 DEG C, afterwards cover roller and load high temperature resistance furnace and heated, heating-up temperature 1100
DEG C, and 3h is kept the temperature at this temperature, air-cooled after insulation, temperature loads low-temperature resistance stove and carries out three sections times after being down to 380 DEG C
Fire processing, the temperature of first segment temper is 490 DEG C, then tempering time is air-cooled to room temperature for 30h, the tempering of second and third section
The temperature of processing is 520 DEG C, tempering time 38h, and room temperature is air-cooled to after tempering insulation；
The preparation of mandrel and the roller preparation method covered are identical with condition.By roller set with mandrel by key connection mode into luggage
Match somebody with somebody, be then machined to finished product by edger roll is combined according to drawing requirement.
Check experiment 2
This check experiment is the check experiment of embodiment 4, and preparation process is as follows：
A kind of high chrome combines edger roll, including roller set and mandrel.The material of roller set is high chrome, the chemistry that high chrome includes
The percentage composition of component and each component is shown in Table 1, and the material of mandrel is forged steel.
High chrome combination edger roll preparation process be：According to the chemical constituent and content dispensing of high chrome, in then utilizing
Frequency stove smelts roller sleeve steel water, and temperature is 1600 DEG C when smelting roller sleeve steel water, and roller sleeve steel water is poured into mold, solidifies 1.8h, so
After demould, then slow cooling is processed to groove is gone out after 75 DEG C, afterwards cover roller and load high temperature resistance furnace and heated, heating-up temperature is
1090 DEG C, and 5h is kept the temperature at this temperature, air-cooled after insulation, temperature loads low-temperature resistance stove after being down to 400 DEG C and carries out three
Section temper, the temperature of first segment temper is 490 DEG C, and tempering time 34h, is then air-cooled to room temperature, second and third section
The temperature of temper is 570 DEG C, tempering time 36h, and room temperature is air-cooled to after tempering insulation；
The preparation of mandrel and the roller preparation method covered are identical with condition.By roller set with mandrel by key connection mode into luggage
Match somebody with somebody, be then machined to finished product by edger roll is combined according to drawing requirement.
Table 1
In order to better illustrate the advantage of high-speed steel combination edger roll prepared by the present invention, by embodiment 1~4 and check experiment
1st, 2 edger rolls prepared carry out machine testing, and specific testing result is as shown in table 2.
Table 2
| Example 1 | Example 2 | Example 3 | Example 4 | Control 1 | Control 2 | |
| Hardness (HS) | 75 | 82 | 79 | 78 | 58 | 72 |
| The roll change cycle (d) | 56 | 62 | 58 | 60 | 15 | 30 |
| Roll surface state during lower machine | It is smooth | It is smooth | It is smooth | It is smooth | Play knurl | It is smooth |
| Lower machine wear extent (mm) | 1.7 | 1.1 | 1.3 | 1.2 | 5.1 | 2.9 |
As can be seen from Table 2, high-speed steel combination (the on-line rolling time in edger roll roll change cycle that prepared by the present invention
) be 56~60d, than check experiment 1 15d and check experiment 2 30d long very much, illustrate the present invention high speed
Steel combination edger roll roll change cycle length, reduces the number for replacing edger roll；Machine back roller under high-speed steel combination edger roll prepared by the present invention
Face is still very smooth, and without a knurl phenomenon, and roll surface has had knurl phenomenon after 1 time machine of check experiment, illustrates the high-speed steel group of the present invention
It is good to close edger roll roll surface quality；Machine wear extent is 1.1~1.7mm under the high-speed steel combination edger roll of the present invention, much smaller than check experiment 1
5.1mm, the 2.9mm of check experiment 2, reduce roller consumption.
Claims (10)
1. a kind of high-speed steel combines edger roll, including roller set and mandrel, it is characterised in that：The roller set includes outer layer and core, outside
The material of layer is high-speed steel, and the material of core is graphitic steel；The material of the mandrel is forged steel.
A kind of 2. high-speed steel combination edger roll according to claim 1, it is characterised in that：The chemical group that the high-speed steel includes
Point and the percentage composition of each component be C0.80~2.00%, Si0.50~1.50%, Mn0.20~1.20%, P≤0.08%, S≤
0.05%, Cr3.00~8.00%, Ni0.50~1.50%, Mo2.00~5.00%, V1.00~3.00%, W0.50~2.50%.
3. edger roll is combined according to a kind of high-speed steel of 1 or 2 any one of them of claim, it is characterised in that preparation process is as follows：
Roller set and mandrel are first prepared respectively, then roller set is preheated, is kept the temperature, and roller set is then subjected to hot charging with mandrel.
A kind of 4. high-speed steel combination edger roll according to claim 3, it is characterised in that：The preheating temperature is 300~450
DEG C, the time of insulation is 3~6h.
A kind of 5. high-speed steel combination edger roll according to claim 3, it is characterised in that:Roller set leads to mandrel during the hot charging
Interference connection is assembled.
6. a kind of high-speed steel combination edger roll according to claim 3, it is characterised in that the preparation process of roller set is as follows：
A. outer layer molten steel and core molten steel are smelted respectively, first outer layer molten steel are poured on centrifugation machine casting mold, outer layer molten steel solidification 4
Core molten steel is poured into after~7min, is demoulded after centrifuging 2~3h；
B. then slow cooling after the roller set demoulding is gone out groove, processing, carry out carrying out flaw detection to 100 DEG C below；
C. the roller set of carrying out flaw detection qualification is loaded high temperature resistance furnace to be heated, then keeps the temperature 2~8h；
D. air-cooled after keeping the temperature, temperature loads low-temperature resistance stove after being down to 300~450 DEG C and carries out three sections of tempers.
A kind of 7. high-speed steel combination edger roll according to claim 6, it is characterised in that：The smelting outer layer molten steel and core
Molten steel is carried out using intermediate frequency furnace, and temperature when smelting outer layer molten steel is 1500~1600 DEG C, smelts temperature during core molten steel
Spend for 1450~1550 DEG C.
A kind of 8. high-speed steel combination edger roll according to claim 6, it is characterised in that：The centrifuge is vertical centrifugal
Machine, rotating speed are 300~500rpm.
A kind of 9. high-speed steel combination edger roll according to claim 6, it is characterised in that：The carrying out flaw detection for ultrasonic wave without
Carrying out flaw detection is damaged, heating-up temperature is 1000~1150 DEG C.
A kind of 10. high-speed steel combination edger roll according to claim 6, it is characterised in that：Three sections of tempers it is every
One section of temper step is that edger roll is heated to 450~600 DEG C, then keeps the temperature 30~40h, is then air-cooled to room temperature.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109930065A (en) * | 2019-03-12 | 2019-06-25 | 江苏共昌轧辊股份有限公司 | A kind of composite high speed steel supporting roll and preparation method thereof |
| CN112247478A (en) * | 2020-09-24 | 2021-01-22 | 酒泉钢铁(集团)有限责任公司 | Copper alloy casting roller sleeve assembling method |
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| CN103320710A (en) * | 2013-06-17 | 2013-09-25 | 唐山亿联盛轧辊有限公司 | High-toughness high-speed steel composite roll |
| CN103624084A (en) * | 2013-11-20 | 2014-03-12 | 枣庄瑞兴机械制造有限公司 | Resource-saving type high-boron high-speed steel composite roll and manufacturing method thereof |
| CN106917035A (en) * | 2017-01-20 | 2017-07-04 | 中钢集团邢台机械轧辊有限公司 | A kind of wear-resisting type ferrochrome collars high and its manufacture method |
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| CN102251187A (en) * | 2011-07-19 | 2011-11-23 | 中材装备集团有限公司 | High-speed steel, extrusion roller containing high-speed steel and production method of extrusion roller |
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| CN112247478A (en) * | 2020-09-24 | 2021-01-22 | 酒泉钢铁(集团)有限责任公司 | Copper alloy casting roller sleeve assembling method |
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Application publication date: 20180511 |