CN101417380B - Manufacture method of composite roller for rolling narrow strip - Google Patents
Manufacture method of composite roller for rolling narrow strip Download PDFInfo
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- CN101417380B CN101417380B CN2007101763414A CN200710176341A CN101417380B CN 101417380 B CN101417380 B CN 101417380B CN 2007101763414 A CN2007101763414 A CN 2007101763414A CN 200710176341 A CN200710176341 A CN 200710176341A CN 101417380 B CN101417380 B CN 101417380B
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Abstract
The invention relates to a manufacturing method of a compound roll used for rolling ribbon steel. The manufacturing method of the roll adopted by the invention comprising the following steps: a shell of the roll is assembled at the outside of a roll core which is made of ductile cast iron; the shell of the roll is made of chrome alloy steel; the strengthening processing is carried out to the surface of the shell of the roll; the strengthening processing comprises the steps as follows: the shell of the roll is placed into a special implanting furnace for carrying out ion implantation processing, after ion implantation processing, and the shell of the roll is assembled with the roll core by adopting a hot charging method; the hot charging method comprises the steps as follows: the surface of the roll is coated with a layer of butter doped with fine tungsten carbide powder, then heating is carried out to the shell of the roll, and the heated shell of the roll is sheathed on the roll core. The method has the advantages and the technical effects that when the shell of the roll is worn to not be used continuously, the shell can be disassembled from the roll core, a new shell of the roll is changed and the whole roll can also be used continuously.
Description
Technical field
The present invention relates to a kind of manufacture method of roll, especially for the manufacture method of compound roll used for rolling ribbon steel.
Background technology
Roll is directly determining the reasonability of production technology and the economy of product as the critical component of milling train.Require the top layer to have high rigidity, high-wearing feature, surface of good fineness as rolling narrow strip with roll, core has enough intensity and toughness.
The manufacturing process of common roll:
The patent No. is the patent of CN1439472A, has introduced a kind of centrifugal casting quick-cutting steel roll manufacture method.The method of centrifugal casting is adopted in this invention, and the rolling body material of high-speed steel roll is high tungsten highspeed steel, and the roller core material is a cast iron.In centrifugal casting of body of roll molten steel and process of setting, adding magnetic induction intensity is 0.03T～0.20T electromagnetic field.Composition is even, reduced in segregation, dense structure, tiny, and every performance obviously is better than common high-speed steel roll.Although this technological operation is convenient, the manufacturing of its body of roll and roller core will divide two cast, and in fusion process, has added more Mo, Cr, V and elements such as w, and correspondingly cost also increases.In whole fusion process, added electromagnetic field, also improved cost virtually.
Carbide has abrasion performance and resistant to elevated temperatures characteristics, and than the more anti-high-speed cutting of high-speed steel, can be adapted to the rolling processing of steel.The patent No. is the patent of CN1050510A, adopts to carry out isostatic cool pressing earlier and handle, and then carries out the static pressure methods such as two of hip treatment, has made the tungsten carbide planishing roll.This technology has produces that apparent size is stable, density is high, does not have the advantage in inherent space, and the more external similar tea product of cost also have significantly reduction.Adopt the tungsten carbide particle of way preparation of powder metallurgy bigger, and its wearability is better than matrix, matrix at first is worn in the operation of rolling, and the tungsten carbide particle of bulk partly exposes out, is subjected to the protection less than matrix.Along with the carrying out of wear process, tungsten carbide particle is peeled off gradually.Tiny hole has just appearred at roller surface, and certainly will the influence of rolled effect.
Summary of the invention
The purpose of this invention is to provide a kind of manufacture method that is used for compound roll used for rolling ribbon steel, comprise the melting of roll overcoat and roller core and the surface Hardening Treatment of roll overcoat.Crystallite dimension by changing tungsten carbide and distribution situation improve itself and high base strength, in the hope of reaching service life of improving roll and the effect of saving cost.
Technical scheme of the present invention for achieving the above object is to adopt a kind of manufacture method of composite roller for rolling narrow strip, the manufacture method of described roll is to be equipped with the roll overcoat outside the roll core, it is characterized in that: the first step adopts ductile cast iron material to make the roll core, second step adopted the chromium alloy steel to make the roll overcoat, the 3rd step was carried out intensive treatment with described roll sleeve surface, described intensive treatment is the roll overcoat to be put into the ion implanting stove carry out the ion implanting processing, the 4th roll overcoat of step after ion implanting is handled adopts the way and the roll core of hot charging to be assembled together, described hot charge practice is to be coated with the last layer butter and it to be scraped smooth at the roll wicking surface earlier, tiny tungsten carbide powder is mixing in the butter, the breaker roll overcoat heats then, with the heating after the roll coat suit on the roll core; The first step that described ion implanting is handled is that roll overcoat and tungsten filament are placed in the bucket, second step that described ion implanting is handled charges into the negative pressure argon gas in bucket, wherein the bucket wall is connected with the electrode negative terminal with the roll overcoat, the center of placing the roll overcoat in bucket is provided with a metallic plate, described metallic plate is connected with the electrode anode, the 3rd step that described ion implanting is handled powers up 1-1.5 hour with positive and negative electrode, described power up the step be to be used in bucket, producing argon ion, make argon ion bombardment tungsten filament at a high speed produce tungsten ion, tungsten ion obtains to be splashed to quickly and evenly on the roll overcoat top layer behind the high-energy, roll overcoat top layer becomes tungsten atom with tungsten ion under the effect of electrode, the roll overcoat that the 4th step that described ion implanting is handled will add after the electric treatment carries out Carburization Treatment, carbon atom and tungsten atom is combined on the roll overcoat top layer generates tungsten carbide.
The roll core that ductile cast iron material of the present invention is made is taked electro-smelting, and pouring temperature is 1400～1450 ℃, and 900～950 ℃ of insulations 2～5 hours, with stove cooling, cooling velocity＜100 ℃/hour were cooled to be chilled to room temperature in 600 ℃ of air of coming out of the stove.
The roll core that ductile cast iron material of the present invention is made is taked QT400.
The roll overcoat that chromium alloy steel of the present invention is made adopts electro-smelting, heat-treats after the melting, and described heat treatment is to adopt the mode of oil quenching to handle when the roll outer sheath temperature reaches 1000 ℃.
The roll overcoat outer surface of the present invention after with heat treatment polished, and polishes to smooth surface.
Chromium alloy steel of the present invention is 2Cr13.
The roll sleeve surface of the present invention after with heat treatment polished to smooth surface, and then puts into bucket, described tungsten filament is loaded on the inwall of bucket.
The present invention is controlled at 900～1100 ℃ with the temperature of described Carburization Treatment.
Roll overcoat of the present invention adopts the way and the roll core of hot charging to be assembled together, and is to assemble with the roll core after the roll overcoat is heated to 120 ℃ in advance again.
Advantage of the present invention and technique effect are that roll sheath is worn down to when can not continue to use, and it can be disassembled from the roll core, and new roller shell is changed, and whole roll can also continue to use.After roll core and the roll overcoat assembling cooling, tungsten carbide powder equally closely is interlocked roll overcoat and roll core with regard to the ivory tooth.The roll overcoat injects tungsten atom and after over carburizing, the original position synthesis technique is compared with traditional handicraft, possesses following advantage: one, wild phase synthetic and growing up all in roll overcoat matrix, and surface cleaning is pollution-free; Two, wild phase generates in course of reaction; Three, emit a large amount of heats in the course of reaction, guaranteed reaction continue carry out, it is less that reaction continues to carry out the extraneous driving force that needs.The cost that is used to like this heat just is greatly diminished.The tungsten carbide particle disperse that reaction in-situ obtains is distributed in the roll overcoat matrix, and combines well with roll overcoat matrix material.Tiny tungsten carbide particle has not only been strengthened roll overcoat matrix, and with roll overcoat matrix be metallurgical binding, therefore in wear process, be difficult for being peeled off.Its macrohardness of roll sleeve surface can reach HRC60.
Description of drawings
Fig. 1 is the flow chart that roll of the present invention is made;
Fig. 2, the 3rd, the photo of notes infiltration layer overall picture;
What Fig. 4,5,6 characterized is the pattern of annotating tungsten carbide particle in the infiltration layer;
Fig. 7 is the XRDP that annotates infiltration layer.
The specific embodiment
Following examples are used to illustrate the present invention, but are not used for limiting the scope of the invention.
To shown in the accompanying drawing 6, as can be seen, tiny tungsten carbide particle disperse is distributed in the matrix from Fig. 1,2 as accompanying drawing 1.Institute obtains that to annotate the infiltration layer composition simple, and complex chart 6 can be determined to annotate infiltration layer and only is made up of tungsten carbide and iron-based body, does not have other impurity and generates mutually.Fig. 3,4,5 shows that the crystallite dimension of tungsten carbide particle is between 30nm～200nm.
Roll core matter of the present invention is chosen for spheroidal graphite cast-iron, and spheroidal graphite cast-iron is QT400.Take electro-smelting, pouring temperature is 1400～1450 ℃.At 900～950 ℃ of insulation 2～5h, with stove cooling (cooling rate＜100 ℃/h).Be cooled to 600 ℃ of air coolings of coming out of the stove to room temperature.
Experimental result shows that roll overcoat basic material is hard more, and the roll overcoat of annotating after oozing is wear-resisting more.In order to realize purpose of the present invention, the roll lagging material is chosen the chromium alloy steel.Adopt electro-smelting.The breaker roll sleeve surface is polished until smooth surface.Then the roll overcoat is put into special ion implanting stove, carried out surface Hardening Treatment.The surface Hardening Treatment of roll overcoat is achieved through the following technical solutions, and it comprises:
Utilize barrel-shaped negative electrode abnormal glow discharge principle, make tungsten become the high energy tungsten ion, at high temperature ooze to diffuse in the roller substrate and go.According to the principle that forms tungsten carbide in the carbon containing atmosphere of tungsten in certain temperature range easily, tungsten is carried out carbonization treatment simultaneously, the skin that reaches the roll overcoat forms the wearing layer of tungsten carbide in the certain depth scope.
Roll overcoat and tungsten filament are placed in the barrel-shaped negative electrode; tungsten filament is installed in the inner surface of bucket; the middle part of roll overcoat is provided with a metallic plate in bucket; this metallic plate is connected with positive electrode; bucket is connected with negative electrode with the roll overcoat; in bucket, charge into the low vacuum argon gas; positive and negative electrode is powered up 1-1.5 hour then; form abnormal glow discharge this moment, produce argon ion, argon ion bombardment tungsten filament at a high speed; produce tungsten ion; tungsten ion obtains high-energy through negative brightness energy overlay region, is splashed to quickly and evenly on the roll overcoat top layer.Then the roll overcoat is warmed to 1000 ℃ and carried out Carburization Treatment 2-3 hour, carbon atom and the synthetic tungsten carbide (WC) of the tungsten atom original position that is injected into roller surface, reaction equation is as follows:
W+C→W
2C (1)
W
2C+C→WC (2)
This synthesis technique is compared with traditional handicraft, possesses following advantage: one, wild phase synthetic and growing up all in roll overcoat matrix, and surface cleaning is pollution-free; Two, wild phase generates in course of reaction; Three, emit a large amount of heats in the course of reaction, guaranteed reaction continue carry out, it is less that reaction continues to carry out the extraneous driving force that needs.So just have in the cost that reduces heating greatly.The WC particle disperse that this reaction obtains is distributed in the roll overcoat matrix, and combines good in Fig. 1,2 with matrix material.The WC particle of annotating in the infiltration layer is very tiny, probably between 30nm～200nm, shown in Fig. 3,4,5.Tiny WC particle has not only been strengthened roll overcoat matrix, and with roll overcoat matrix be metallurgical binding, therefore in wear process, be difficult for being peeled off.Whole notes infiltrate journey approximately needs 4 hours.Annotate alloying layer thickness and can reach 1.0～1.2mm, its macrohardness can reach HRC60.
The way of hot charging is adopted in assembling between the roll overcoat and the body of roll.Earlier on the body of roll, be coated with the last layer butter, the tiny tungsten carbide powder that mixing in the butter, the pair roller cover carries out preheating then, be preheating to about 120 ℃, with the roll coat suit to the roll core.After treating the cooling of roll overcoat, the tungsten carbide powder in the butter equally closely is interlocked roll overcoat and roll core with regard to the ivory tooth.
In an embodiment of the present invention, composite roller overcoat external diameter is 405mm, and internal diameter is 400mm, and long is 400mm, and the roller core diameter is 400mm, and long is 1000mm.
Spheroidal graphite cast-iron is selected QT400 for use.Take electro-smelting, pouring temperature is 1400～1450 ℃.Heat-treat after the melting.900～950 ℃ of insulations 2～5 hours, with stove cooling, cooling velocity＜100 ℃/hour.Come out of the stove when being cooled to 600 ℃, in air, be cooled to room temperature then.
Roll lagging material of the present invention is selected 2Cr13 for use.Adopt electro-smelting.Heat-treat after the melting, described heat treatment is to adopt the mode of oil quenching to handle when the roll overcoat is heated to 1000 ℃.The roll sleeve surface polish subsequently until smooth surface.The roll overcoat is put into special ion implanting stove, carry out ion implanting and handle.Whole notes infiltrate journey approximately needs 4 hours.
The way of hot charging is adopted in assembling between roll overcoat and the roller core.Outer surface at roller core is coated with the last layer butter earlier, the tiny tungsten carbide powder that mixing in the butter, and the breaker roll overcoat carries out preheating then, is preheating to about 120 ℃, and the roll sheath overcoat is installed on the roll core.After treating the cooling of roll overcoat, the tungsten carbide powder in the butter equally closely is interlocked roll overcoat and roll core with regard to the ivory tooth.
When the roll overcoat is worn down to when can not continue to use, it can be disassembled from the roll core, new roll overcoat to be changed, whole roll can also continue to use.
More than be preferred forms of the present invention, according to content disclosed by the invention, some identical, replacement schemes that those of ordinary skill in the art can expect apparently all should fall into the scope of protection of the invention.
Claims (9)
1. manufacture method of composite roller for rolling narrow strip, the manufacture method of described roll is to be equipped with the roll overcoat outside the roll core, it is characterized in that: the first step adopts ductile cast iron material to make the roll core, second step adopted the chromium alloy steel to make the roll overcoat, the 3rd step was carried out intensive treatment with described roll sleeve surface, described intensive treatment is the roll overcoat to be put into the ion implanting stove carry out the ion implanting processing, the 4th roll overcoat of step after ion implanting is handled adopts the way and the roll core of hot charging to be assembled together, the way of described hot charging is to be coated with the last layer butter and it to be scraped smooth at the roll wicking surface earlier, tiny tungsten carbide powder is mixing in the butter, the breaker roll overcoat heats then, with the heating after the roll coat suit on the roll core; The first step that described ion implanting is handled is that roll overcoat and tungsten filament are placed in the bucket, second step that described ion implanting is handled charges into the negative pressure argon gas in bucket, wherein the bucket wall is connected with the electrode negative terminal with the roll overcoat, the center of placing the roll overcoat in bucket is provided with a metallic plate, described metallic plate is connected with the electrode anode, the 3rd step that described ion implanting is handled powers up 1-1.5 hour with positive and negative electrode, described powering up is to be used for producing in bucket argon ion, make argon ion bombardment tungsten filament at a high speed produce tungsten ion, tungsten ion obtains to be splashed to quickly and evenly on the roll overcoat top layer behind the high-energy, roll overcoat top layer becomes tungsten atom with tungsten ion under the effect of electrode, the roll overcoat that the 4th step that described ion implanting is handled will add after the electric treatment carries out Carburization Treatment, carbon atom and tungsten atom is combined on the roll overcoat top layer generates tungsten carbide.
2. manufacture method of composite roller for rolling narrow strip as claimed in claim 1, it is characterized in that the roll core that described ductile cast iron material is made takes electro-smelting, pouring temperature is 1400～1450 ℃, 900～950 ℃ of insulations 2～5 hours, cool off with stove, cooling velocity＜100 ℃/hour are cooled to be chilled to room temperature in 600 ℃ of air of coming out of the stove.
3. manufacture method of composite roller for rolling narrow strip as claimed in claim 2 is characterized in that the roll core that described ductile cast iron material is made, and takes QT400.
4. manufacture method of composite roller for rolling narrow strip as claimed in claim 1, it is characterized in that the roll overcoat that described chromium alloy steel is made adopts electro-smelting, heat-treat after the melting, described heat treatment is to adopt the mode of oil quenching to handle when the roll outer sheath temperature reaches 1000 ℃.
5. manufacture method of composite roller for rolling narrow strip as claimed in claim 4 is characterized in that the roll overcoat outer surface after the heat treatment is polished, and polishes to smooth surface.
6. manufacture method of composite roller for rolling narrow strip as claimed in claim 5 is characterized in that described chromium alloy steel is 2Cr13.
7. manufacture method of composite roller for rolling narrow strip as claimed in claim 6 is characterized in that the roll sleeve surface after the heat treatment is polished to smooth surface, and then puts into bucket, described tungsten filament is loaded on the inwall of bucket.
8. manufacture method of composite roller for rolling narrow strip as claimed in claim 7 is characterized in that the temperature of described Carburization Treatment is controlled at 900～1100 ℃.
9. manufacture method of composite roller for rolling narrow strip as claimed in claim 8 is characterized in that described roll overcoat adopts the way and the roll core of hot charging to be assembled together, and is to assemble with the roll core after the roll overcoat is heated to 120 ℃ in advance again.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101763414A CN101417380B (en) | 2007-10-25 | 2007-10-25 | Manufacture method of composite roller for rolling narrow strip |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101763414A CN101417380B (en) | 2007-10-25 | 2007-10-25 | Manufacture method of composite roller for rolling narrow strip |
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| Publication Number | Publication Date |
|---|---|
| CN101417380A CN101417380A (en) | 2009-04-29 |
| CN101417380B true CN101417380B (en) | 2010-09-01 |
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| CN2007101763414A Expired - Fee Related CN101417380B (en) | 2007-10-25 | 2007-10-25 | Manufacture method of composite roller for rolling narrow strip |
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Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102010027971A1 (en) * | 2010-04-20 | 2011-10-20 | Voith Patent Gmbh | Quetschwerk for a strip mill and strip mill |
| CN103143931B (en) * | 2013-03-06 | 2015-06-17 | 陕西建工集团设备安装工程有限公司 | High-pressure grinding roller installation construction technology |
| CN103302457B (en) * | 2013-06-19 | 2016-09-21 | 秦英方 | A kind of Bar Wire Product and hot strip rolling mill working roll production technology |
| CN105312540B (en) * | 2015-11-12 | 2017-12-22 | 丹阳恒庆复合材料科技有限公司 | The composite roll manufacturing process and equipment of a kind of reusable edible roller core |
| CN106180197B (en) * | 2016-07-20 | 2018-09-21 | 西安理工大学 | A kind of cold roll and preparation method thereof with chromium carbide enhancement layer |
| CN106011732B (en) * | 2016-07-20 | 2018-11-27 | 西安理工大学 | A kind of high chrome alloy steel and preparation method thereof with chromium carbide enhancement layer |
| CN106180241B (en) * | 2016-07-20 | 2018-09-21 | 西安理工大学 | A kind of high-speed steel Cold Extrusion Punch and preparation method thereof with micron order tungsten carbide enhancement layer |
| CN106040744B (en) * | 2016-07-20 | 2018-09-21 | 西安理工大学 | A kind of Heat Working Rolls and preparation method thereof with micron order tungsten carbide enhancement layer |
| CN105970149B (en) * | 2016-07-20 | 2018-11-27 | 西安理工大学 | A kind of preparation method of low-carbon high-tungsten alloy steel and low-carbon high-tungsten alloy steel ontology |
| CN106122447A (en) * | 2016-07-20 | 2016-11-16 | 西安理工大学 | A kind of belt pulley and the preparation method of belt pulley |
| CN106345980B (en) * | 2016-08-25 | 2019-02-22 | 中钢集团邢台机械轧辊有限公司 | Abrasion resistant particles roller press-roller sleeve manufacturing method |
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Assignee: Hebei Jinxi Steel Group Dafang Industry Technology Co.,Ltd. Assignor: Beijing Beike Derui Metallurgy Engineering Technology Co Ltd|IDE Beijing science and Technology Co Ltd Contract record no.: 2011130000146 Denomination of invention: Manufacture method of composite roller for rolling narrow strip Granted publication date: 20100901 License type: Exclusive License Open date: 20090429 Record date: 20110926 |
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