CN106001481A - Centrifugal casting bimetal roller and production method thereof - Google Patents

Centrifugal casting bimetal roller and production method thereof Download PDF

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Publication number
CN106001481A
CN106001481A CN201610482161.8A CN201610482161A CN106001481A CN 106001481 A CN106001481 A CN 106001481A CN 201610482161 A CN201610482161 A CN 201610482161A CN 106001481 A CN106001481 A CN 106001481A
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CN
China
Prior art keywords
steel
roll
layer
molten steel
roughing
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CN201610482161.8A
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Chinese (zh)
Inventor
马平原
张新兵
杨占省
何波
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HANDAN XINXING SPECIAL PIPE MATERIAL Co Ltd
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HANDAN XINXING SPECIAL PIPE MATERIAL Co Ltd
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Priority to CN201610482161.8A priority Critical patent/CN106001481A/en
Publication of CN106001481A publication Critical patent/CN106001481A/en
Pending legal-status Critical Current

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22DCASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D13/00Centrifugal casting; Casting by using centrifugal force
    • B22D13/02Centrifugal casting; Casting by using centrifugal force of elongated solid or hollow bodies, e.g. pipes, in moulds rotating around their longitudinal axis
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22DCASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D19/00Casting in, on, or around objects which form part of the product
    • B22D19/16Casting 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

Abstract

The invention discloses a centrifugal casting bimetal roller. The centrifugal casting bimetal roller comprises an outer layer and a lining layer, wherein the outer layer is fixedly arranged outside the lining layer in a sleeving manner; the outer layer and the lining layer are firmly combined; the outer layer adopts high-hardness alloy steel; the lining layer adopts malleable steel; and the malleable steel is malleable carbon steel or malleable low alloy steel. According to the centrifugal casting bimetal roller, the outer layer is manufactured through adopting the high-hardness alloy steel, the lining layer is manufactured through adopting high-roughness malleable steel, and the high-hardness alloy steel and the malleable steel are perfectly combined, so that the bimetal roller has ultralong service life. The invention further provides a production method of the centrifugal casting bimetal roller. According to the production method of the centrifugal casting bimetal roller, the technology is simple, a lot of alloy is saved, the production cost is low, and the competitiveness of enterprises is favorably improved.

Description

A kind of spun casting bimetal roller and production method thereof
Technical field
The present invention relates to roll production technical field, specifically a kind of spun casting bimetal roller and production method thereof.
Background technology
Roll is the strength member on steel rolling mill's rolling mill, and the pressure utilizing a pair or producing time one group of roll rolls is to roll stone roller steel Material.It is primarily subjected to Dynamic And Static Loads during rolling, abrasion and the impact of variations in temperature.Existing roll production technology is typically divided Being two kinds, the first is for using high carbon chromium molybdenum steel, and through electroslag, forging, machining;The second closes for using low-carbon (LC) Jin Gang, processes through surface overlaying hard alloy.The roll using high carbon chromium molybdenum steel to produce is relatively costly, and mechanical Poor-performing, although employing low-carbon alloy steel the roll through built-up welding production solve the problems referred to above, but due to its compound thickness Spend relatively thin, affect its service life, cause the problem that roll working life is short.
Summary of the invention
It is an object of the invention to provide a kind of spun casting bimetal roller and production method thereof, to solve above-mentioned background technology The problem of middle proposition.
For achieving the above object, the present invention provides following technical scheme:
A kind of spun casting bimetal roller, including outer layer and inner liner, described outer layer fixed cover is located at outside inner liner, both Between be firmly combined with, the material of described outer layer is high hardness alloy steel, and the material of described inner liner is ductile steel, described toughness Steel is toughness carbon steel or tenacity, low-alloy steel, uses the high hardness alloy steel with high rigidity to make outer layer, and employing has height The ductile steel of toughness makes inner liner, thus by high hardness alloy steel and toughness steel perfect adaptation, makes this bimetal roller have Having the service life of overlength, and saved a large amount of alloy, production cost is low.
As the further scheme of the present invention: the high hardness alloy steel used by described outer layer selected from following model: MC5,9Cr5Mo, 9Cr3Mo、9Cr2Mo、70Cr3Mo、H13、Cr5、2Cr12MoWVNb、9Cr18Mo。
As the present invention further scheme: the ductile steel used by described inner liner selected from following model: 16Mn, 20Mn, 20#、25CrMo、25CrMoV、35#、35CrMo、35CrNiMo。
The production method of described spun casting bimetal roller, step is as follows:
1) two intermediate frequency furnaces are used to smelt the high hardness alloy molten steel making outer layer and the toughness molten steel making inner liner respectively;
2) centrifuge mould is heated to 200~320 DEG C, and centrifuge mould wall of die cavity coat 1.6~ The coating that 2.2mm is thick;
3) centrifugal casting compound metallurgical method is used to be cast into successively being centrifuged by the high hardness alloy molten steel smelted and toughness molten steel In the mold cavity of machine mould, and after cooling molding, the blank roll of acquisition is extracted;
4) blank roll is carried out high temperature spheroidising;
5) the blank roll after spheroidising is carried out successively tack process and roughing processes, it is thus achieved that roughing roll;
6) roughing roll is carried out modifier treatment;
7) the roughing roll after modifier treatment is carried out polish process, it is thus achieved that polishing roll.
As the further scheme of the present invention: step 3) detailed process be: by equal to high hardness alloy molten steel and toughness molten steel Being heated to the degree of superheat is 30~80 DEG C, is first poured into by high hardness alloy molten steel in the mold cavity of centrifuge mould, interval After certain time, in the mold cavity of centrifuge mould, pour into a mould toughness molten steel, the blank that will obtain when being cooled to 1000 DEG C Roll is extracted.
As the present invention further scheme: step 4) in, the method for high temperature spheroidising is: by blank roll from mould After extracting in tool die cavity, hot charging enters in balling furnace, is incubated 2~6h, cools to 700~760 DEG C with the furnace at 800~900 DEG C, Insulation 4~8h, finally cools to less than 200 DEG C with the furnace and comes out of the stove.
As the present invention further scheme: step 5) in, it is first according to size and blank roll is carried out tack process, Blank roll after processing tack the most again carries out roughing process, the processing of reserved 1~2mm in roughing processing procedure Amount.
As the present invention further scheme: step 6) in, the method for modifier treatment is: roughing roll is put into tune In matter stove, first insulation 2~6h at 980~1080 DEG C, oil processing of quenching, at 200~300 DEG C, then it is incubated 2~6h, Air cooling.
Compared with prior art, the invention has the beneficial effects as follows:
1, the spun casting bimetal roller that prepared by the present invention, is firmly combined with between its outer layer and inner liner, uses and has height The high hardness alloy steel of hardness makes outer layer, and uses the ductile steel with high tenacity to make inner liner, thus high rigidity is closed Jin Gang and toughness steel perfect adaptation, the thickness of outer layer can set according to demand, makes this bimetal roller have overlength Service life;
2, the production method of spun casting bimetal roller of the present invention, technique is simple, and has saved a large amount of alloy, produces into This is low, is conducive to improving the competitiveness of enterprise.
Accompanying drawing explanation
Fig. 1 is the structural representation of spun casting bimetal roller.
In figure: 1-outer layer, 2-inner liner.
Detailed description of the invention
Below in conjunction with detailed description of the invention, technical scheme is described in more detail.
Embodiment 1
Referring to Fig. 1, a kind of spun casting bimetal roller, including outer layer 1 and inner liner 2, described outer layer 1 fixed cover Being located at outside inner liner 2, be firmly combined with between the two, the material of described outer layer 1 is high hardness alloy steel, described inner liner 2 Material be ductile steel, described ductile steel is toughness carbon steel or tenacity, low-alloy steel;High hardness alloy used by described outer layer 1 Steel pattern number is H13;Ductile steel model used by described inner liner 2 is 25CrMoV.
The product specification of prepared spun casting bimetal roller is(outer layer 40mm+ internal layer 50mm) *650mm。
The production method of spun casting bimetal roller described in the present embodiment, step is as follows:
1) two intermediate frequency furnaces are used to smelt the high hardness alloy molten steel making outer layer 1 and the ductile steel making inner liner 2 respectively Liquid;
2) centrifuge mould is heated to 200 DEG C, and it is thick to coat 1.6mm at the wall of die cavity of centrifuge mould Coating;
3) the high hardness alloy molten steel needed for calculating according to product specification and the weight of toughness molten steel, first by high hardness alloy Molten steel is poured in the mold cavity of centrifuge mould, and the temperature of high hardness alloy molten steel is 1500 DEG C, after separated in time, Pouring into a mould toughness molten steel in the mold cavity of centrifuge mould, the temperature of toughness molten steel is 1540 DEG C, is being cooled to 1000 DEG C Time the blank roll of acquisition is extracted;
4) blank roll carrying out high temperature spheroidising, the method for high temperature spheroidising is: by blank roll from mold cavity After inside extracting, hot charging enters in balling furnace, is incubated 2h, cools to 700 DEG C with the furnace, be incubated 4h, finally with stove at 800 DEG C It is cooled to 200 DEG C come out of the stove;
5) it is first according to specification and the blank roll after spheroidising is carried out tack process, after the most again tack being processed Blank roll carry out roughing process, the processing capacity of reserved 1mm in roughing processing procedure;
6) roughing roll being carried out modifier treatment, the method for modifier treatment is: roughing roll is put into hardening and tempering furnace, First at 980 DEG C, it is incubated 2h, oil processing of quenching, at 200 DEG C, is then incubated 2h, air cooling;
7) the roughing roll after modifier treatment is carried out polish process, it is thus achieved that polishing roll.
Embodiment 2
Referring to Fig. 1, a kind of spun casting bimetal roller, including outer layer 1 and inner liner 2, described outer layer 1 fixed cover Being located at outside inner liner 2, be firmly combined with between the two, the material of described outer layer 1 is high hardness alloy steel, described inner liner 2 Material be ductile steel, described ductile steel is toughness carbon steel or tenacity, low-alloy steel;High hardness alloy used by described outer layer 1 Steel pattern number is H13;Ductile steel model used by described inner liner 2 is 25CrMoV.
The product specification of prepared spun casting bimetal roller is(outer layer 40mm+ internal layer 50mm) *650mm。
The production method of spun casting bimetal roller described in the present embodiment, step is as follows:
1) two intermediate frequency furnaces are used to smelt the high hardness alloy molten steel making outer layer 1 and the ductile steel making inner liner 2 respectively Liquid;
2) centrifuge mould is heated to 260 DEG C, and it is thick to coat 1.8mm at the wall of die cavity of centrifuge mould Coating;
3) the high hardness alloy molten steel needed for calculating according to product specification and the weight of toughness molten steel, first by high hardness alloy Molten steel is poured in the mold cavity of centrifuge mould, and the temperature of high hardness alloy molten steel is 1550 DEG C, after separated in time, Pouring into a mould toughness molten steel in the mold cavity of centrifuge mould, the temperature of toughness molten steel is 1560 DEG C, is being cooled to 1000 DEG C Time the blank roll of acquisition is extracted;
4) blank roll carrying out high temperature spheroidising, the method for high temperature spheroidising is: by blank roll from mold cavity After inside extracting, hot charging enters in balling furnace, is incubated 4h, cools to 720 DEG C with the furnace, be incubated 6h, finally with stove at 850 DEG C It is cooled to 180 DEG C come out of the stove;
5) it is first according to specification and the blank roll after spheroidising is carried out tack process, after the most again tack being processed Blank roll carry out roughing process, the processing capacity of reserved 1.5mm in roughing processing procedure;
6) roughing roll being carried out modifier treatment, the method for modifier treatment is: roughing roll is put into hardening and tempering furnace, First at 1040 DEG C, it is incubated 3h, oil processing of quenching, at 280 DEG C, is then incubated 6h, air cooling;
7) the roughing roll after modifier treatment is carried out polish process, it is thus achieved that polishing roll.
Embodiment 3
Referring to Fig. 1, a kind of spun casting bimetal roller, including outer layer 1 and inner liner 2, described outer layer 1 fixed cover Being located at outside inner liner 2, be firmly combined with between the two, the material of described outer layer 1 is high hardness alloy steel, described inner liner 2 Material be ductile steel, described ductile steel is toughness carbon steel or tenacity, low-alloy steel;High hardness alloy used by described outer layer 1 Steel pattern number is 9Cr5Mo;Ductile steel model used by described inner liner 2 is 35CrNiMo.
The product specification of prepared spun casting bimetal roller is(outer layer 45mm+ internal layer 55mm) *700mm。
The production method of spun casting bimetal roller described in the present embodiment, step is as follows:
1) two intermediate frequency furnaces are used to smelt the high hardness alloy molten steel making outer layer 1 and the ductile steel making inner liner 2 respectively Liquid;
2) centrifuge mould is heated to 300 DEG C, and it is thick to coat 2.0mm at the wall of die cavity of centrifuge mould Coating;
3) the high hardness alloy molten steel needed for calculating according to product specification and the weight of toughness molten steel, first by high hardness alloy Molten steel is poured in the mold cavity of centrifuge mould, and the temperature of high hardness alloy molten steel is 1560 DEG C, after separated in time, Pouring into a mould toughness molten steel in the mold cavity of centrifuge mould, the temperature of toughness molten steel is 1590 DEG C, is being cooled to 1000 DEG C Time the blank roll of acquisition is extracted;
4) blank roll carrying out high temperature spheroidising, the method for high temperature spheroidising is: by blank roll from mold cavity After inside extracting, hot charging enters in balling furnace, is incubated 5h, cools to 750 DEG C with the furnace, be incubated 7h, finally with stove at 880 DEG C It is cooled to 160 DEG C come out of the stove;
5) it is first according to specification and the blank roll after spheroidising is carried out tack process, after the most again tack being processed Blank roll carry out roughing process, the processing capacity of reserved 2mm in roughing processing procedure;
6) roughing roll being carried out modifier treatment, the method for modifier treatment is: roughing roll is put into hardening and tempering furnace, First at 1050 DEG C, it is incubated 4h, oil processing of quenching, at 270 DEG C, is then incubated 5h, air cooling;
7) the roughing roll after modifier treatment is carried out polish process, it is thus achieved that polishing roll.
Embodiment 4
Referring to Fig. 1, a kind of spun casting bimetal roller, including outer layer 1 and inner liner 2, described outer layer 1 fixed cover Being located at outside inner liner 2, be firmly combined with between the two, the material of described outer layer 1 is high hardness alloy steel, described inner liner 2 Material be ductile steel, described ductile steel is toughness carbon steel or tenacity, low-alloy steel;High hardness alloy used by described outer layer 1 Steel pattern number is 2Cr12MoWVNb;Ductile steel model used by described inner liner 2 is 25CrMo.
The product specification of prepared spun casting bimetal roller is(outer layer 40mm+ internal layer 50mm) *600mm。
The production method of spun casting bimetal roller described in the present embodiment, step is as follows:
1) two intermediate frequency furnaces are used to smelt the high hardness alloy molten steel making outer layer 1 and the ductile steel making inner liner 2 respectively Liquid;
2) centrifuge mould is heated to 320 DEG C, and it is thick to coat 2.2mm at the wall of die cavity of centrifuge mould Coating;
3) the high hardness alloy molten steel needed for calculating according to product specification and the weight of toughness molten steel, first by high hardness alloy Molten steel is poured in the mold cavity of centrifuge mould, and the temperature of high hardness alloy molten steel is 1570 DEG C, after separated in time, Pouring into a mould toughness molten steel in the mold cavity of centrifuge mould, the temperature of toughness molten steel is 1600 DEG C, is being cooled to 1000 DEG C Time the blank roll of acquisition is extracted;
4) blank roll carrying out high temperature spheroidising, the method for high temperature spheroidising is: by blank roll from mold cavity After inside extracting, hot charging enters in balling furnace, is incubated 6h, cools to 760 DEG C with the furnace, be incubated 8h, finally with stove at 900 DEG C It is cooled to 190 DEG C come out of the stove;
5) it is first according to specification and the blank roll after spheroidising is carried out tack process, after the most again tack being processed Blank roll carry out roughing process, the processing capacity of reserved 2mm in roughing processing procedure;
6) roughing roll being carried out modifier treatment, the method for modifier treatment is: roughing roll is put into hardening and tempering furnace, First at 1080 DEG C, it is incubated 6h, oil processing of quenching, at 300 DEG C, is then incubated 6h, air cooling;
7) the roughing roll after modifier treatment is carried out polish process, it is thus achieved that polishing roll.
Embodiment 5
Referring to Fig. 1, a kind of spun casting bimetal roller, including outer layer 1 and inner liner 2, described outer layer 1 fixed cover Being located at outside inner liner 2, be firmly combined with between the two, the material of described outer layer 1 is high hardness alloy steel, described inner liner 2 Material be ductile steel, described ductile steel is toughness carbon steel or tenacity, low-alloy steel;High hardness alloy used by described outer layer 1 Steel pattern number is 9Cr18Mo;Ductile steel model used by described inner liner 2 is: 16Mn.
The product specification of prepared spun casting bimetal roller is(outer layer 45mm+ internal layer 55mm) *700mm。
The production method of spun casting bimetal roller described in the present embodiment, step is as follows:
1) two intermediate frequency furnaces are used to smelt the high hardness alloy molten steel making outer layer 1 and the ductile steel making inner liner 2 respectively Liquid;
2) centrifuge mould is heated to 230 DEG C, and it is thick to coat 1.9mm at the wall of die cavity of centrifuge mould Coating;
3) the high hardness alloy molten steel needed for calculating according to product specification and the weight of toughness molten steel, first by high hardness alloy Molten steel is poured in the mold cavity of centrifuge mould, and the temperature of high hardness alloy molten steel is 1560 DEG C, after separated in time, Pouring into a mould toughness molten steel in the mold cavity of centrifuge mould, the temperature of toughness molten steel is 1590 DEG C, is being cooled to 1000 DEG C Time the blank roll of acquisition is extracted;
4) blank roll carrying out high temperature spheroidising, the method for high temperature spheroidising is: by blank roll from mold cavity After inside extracting, hot charging enters in balling furnace, is incubated 3h, cools to 720 DEG C with the furnace, be incubated 4h, finally with stove at 820 DEG C It is cooled to 150 DEG C come out of the stove;
5) it is first according to specification and the blank roll after spheroidising is carried out tack process, after the most again tack being processed Blank roll carry out roughing process, the processing capacity of reserved 1.5mm in roughing processing procedure;
6) roughing roll being carried out modifier treatment, the method for modifier treatment is: roughing roll is put into hardening and tempering furnace, First at 1000 DEG C, it is incubated 5h, oil processing of quenching, at 240 DEG C, is then incubated 3h, air cooling;
7) the roughing roll after modifier treatment is carried out polish process, it is thus achieved that polishing roll.
Spun casting bimetal roller prepared by the present invention, is firmly combined with between its outer layer 1 and inner liner 2, uses and has height The high hardness alloy steel of hardness makes outer layer 1, and uses the ductile steel with high tenacity to make inner liner 2, thus height is hard Degree steel alloy and toughness steel perfect adaptation, the thickness of outer layer 1 can set according to demand, makes this bimetal roller have The service life of overlength;The production method of spun casting bimetal roller of the present invention, technique is simple, and has saved a large amount of alloy, Production cost is low, is conducive to improving the competitiveness of enterprise.
Above the better embodiment of the present invention is explained in detail, but the present invention is not limited to above-mentioned embodiment, In the ken that those of ordinary skill in the art is possessed, it is also possible to make each on the premise of without departing from present inventive concept Plant change.

Claims (8)

1. a spun casting bimetal roller, it is characterised in that include outer layer (1) and inner liner (2), described outside Layer (1) fixed cover is located at inner liner (2) outward, is firmly combined with between the two, and the material of described outer layer (1) is high rigidity Steel alloy, the material of described inner liner (2) is ductile steel, and described ductile steel is toughness carbon steel or tenacity, low-alloy steel.
Spun casting bimetal roller the most according to claim 1, it is characterised in that used by described outer layer (1) High hardness alloy steel selected from following model: MC5,9Cr5Mo, 9Cr3Mo, 9Cr2Mo, 70Cr3Mo, H13, Cr5, 2Cr12MoWVNb、9Cr18Mo。
Spun casting bimetal roller the most according to claim 2, it is characterised in that described inner liner (2) is used Ductile steel selected from following model: 16Mn, 20Mn, 20#, 25CrMo, 25CrMoV, 35#, 35CrMo, 35CrNiMo.
4. the production method of the spun casting bimetal roller as described in claim 1-3 is arbitrary, it is characterised in that Step is as follows:
1) use two intermediate frequency furnaces to smelt respectively make the high hardness alloy molten steel of outer layer (1) and make inner liner (2) Toughness molten steel;
2) centrifuge mould is heated to 200~320 DEG C, and centrifuge mould wall of die cavity coat 1.6~ The coating that 2.2mm is thick;
3) centrifugal casting compound metallurgical method is used to be cast into successively being centrifuged by the high hardness alloy molten steel smelted and toughness molten steel In the mold cavity of machine mould, and after cooling molding, the blank roll of acquisition is extracted;
4) blank roll is carried out high temperature spheroidising;
5) the blank roll after spheroidising is carried out successively tack process and roughing processes, it is thus achieved that roughing roll;
6) roughing roll is carried out modifier treatment;
7) the roughing roll after modifier treatment is carried out polish process, it is thus achieved that polishing roll.
The production method of spun casting bimetal roller the most according to claim 4, it is characterised in that step 3) Detailed process is: high hardness alloy molten steel and toughness molten steel are both heated to the degree of superheat is 30~80 DEG C, first high rigidity is closed Gold molten steel is poured in the mold cavity of centrifuge mould, after separated in time, waters in the mold cavity of centrifuge mould Note toughness molten steel, extracts the blank roll of acquisition when being cooled to 1000 DEG C.
The production method of spun casting bimetal roller the most according to claim 5, it is characterised in that step 4) in, The method of high temperature spheroidising is: after being extracted in mold cavity by blank roll, and hot charging enters in balling furnace, at 800~900 DEG C Lower insulation 2~6h, cools to 700~760 DEG C with the furnace, is incubated 4~8h, finally cools to less than 200 DEG C with the furnace and come out of the stove.
The production method of spun casting bimetal roller the most according to claim 6, it is characterised in that step 5) in, Being first according to size and blank roll carries out tack process, the blank roll after processing tack the most again is carried out at roughing Reason, the processing capacity of reserved 1~2mm in roughing processing procedure.
The production method of spun casting bimetal roller the most according to claim 7, it is characterised in that step 6) in, The method of modifier treatment is: roughing roll is put into hardening and tempering furnace, is first incubated 2~6h at 980~1080 DEG C, quenches Oil processing, is then incubated 2~6h, air cooling at 200~300 DEG C.
CN201610482161.8A 2016-06-28 2016-06-28 Centrifugal casting bimetal roller and production method thereof Pending CN106001481A (en)

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Cited By (1)

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Publication number Priority date Publication date Assignee Title
CN109513904A (en) * 2018-12-04 2019-03-26 湖南四昉新材料有限公司 A kind of processing method and bimetallic composite roll set of bimetallic composite roll set

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109513904A (en) * 2018-12-04 2019-03-26 湖南四昉新材料有限公司 A kind of processing method and bimetallic composite roll set of bimetallic composite roll set

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Application publication date: 20161012