CN104959194A - Metal ceramic grinding roller, and preparation method thereof - Google Patents
Metal ceramic grinding roller, and preparation method thereof Download PDFInfo
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- CN104959194A CN104959194A CN201510264827.8A CN201510264827A CN104959194A CN 104959194 A CN104959194 A CN 104959194A CN 201510264827 A CN201510264827 A CN 201510264827A CN 104959194 A CN104959194 A CN 104959194A
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- wearing layer
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Abstract
The invention provides a metal ceramic grinding roller and a preparation method thereof. The metal ceramic grinding roller comprises a roller body and a wear-resistant layer arranged on the surface of the roller body; the wear-resistant layer comprises, by mass, 20 to 40% of a mixed powder, and iron; the mixed powder comprises, by mass, 10.0 to 20.0% of titanium carbide, 5.0 to 15.0% of niobium carbide, 3.0 to 5.0% of chromium carbide, 1.0 to 2.0% of boron carbide, 0.1 to 0.5% of vanadium, 0.1 to 0.5% of molybdenum, and 0.01 to 0.1% of sulfur and phosphor. Bonding strength, toughness, and wear resistance of the wear-resistant layer of the metal ceramic grinding roller are increased greatly; specific gravity is light; and hardness is high.
Description
Technical field
The present invention relates to a kind of welding material, be specifically related to a kind of cermet grinding roller and preparation method thereof.
Background technology
Coal pulverizer is widely used in thermal power plant, Pulverized Coal is prepared in mine, cement plant.It is violent that Pulverized Coal doping hardness of matter causes Roller of Coal Grinder to wear and tear, and causes service life short, and comprehensive resources waste is serious.Usual Roller of Coal Grinder is cast by rich chromium cast iron and steel alloy and is formed, if again cast replacing because of grinding roller wear out failure, certainly will cause great waste, and greatly increase production cost.Many Roller of Coal Grinders adopt build-up wear-resistant coating technology to resist wearing and tearing for this reason, thus the service life of elongate member, improve equipment operating efficiency, reduce integrated cost, belong to energy-saving and emission-reduction field.
The grinding roller of coal pulverizer adopts build-up wear-resistant coating technology, is abrasion-resistant powder core welding wire built-up welding is formed wear-resistant coating on grinding roller roller shell surface.Heap postwelding roller shell compared with new product cast member, because wearing layer hardness is higher, than the grinding roller of non-built-up welding scuff-resistant coating more effectively can resist abrasive wear, thus there is the wearability more much better than than non-built-up welding grinding roller.
In prior art, the char-forming material such as tungsten carbide, titanium carbide is as the hard phase in grinding roller, hard and crisp due to it, poor toughness, heavily stressed, be hit, work under the working condition such as strong tired time, wearing layer easily cracks, Particle Breakage and coming off, thus loses wearability.Secondly, because grinding roller roller shell mother metal is generally rich chromium cast iron, the bead welding wire component difference of carburet gold is large, and cause solder joints intensity low, the matrix of wearing layer and grinding roller is easily peeled off, and loses wearability.
Summary of the invention
The present invention is intended to solve above-described problem.The object of this invention is to provide a kind of cermet grinding roller and preparation method thereof.
According to an aspect of the present invention, the invention provides a kind of cermet grinding roller, comprise roll body and the wearing layer being arranged on roll body surface, it is characterized in that: described wearing layer comprises the mixed-powder of following mass percent: the vanadium of the chromium carbide of the titanium carbide of 10.0%-20.0%, the niobium carbide of 5.0%-15.0%, 3.0%-5.0%, the boron carbide of 1.0%-2.0%, 0.1%-0.5%, the molybdenum of 0.1%-0.5%, the sulphur of 0.01%-0.1% and phosphorus, described wearing layer also comprises iron; The mass percentage of described mixed-powder in described wearing layer is 20%-40%.
Preferably, described wearing layer is by the component of following mass percent: the titanium carbide of 15.0%, the niobium carbide of 8.0%, 4.0% chromium carbide, 2.0% boron carbide, 0.5% vanadium, the molybdenum of 0.5%, the sulphur of 0.01% and phosphorus, surplus is iron.
Preferably, the mixed-powder of described wearing layer also comprises 0.5%-2.0% titanium diboride and the 0.5%-2.0% niobium dioxide of following mass percent.
Preferably, described wearing layer is mixed by following mass percent: the titanium carbide of 15.0%, the niobium carbide of 8.0%, 4.0% chromium carbide, 2.0% boron carbide, 0.5% vanadium, the molybdenum of 0.5%, the sulphur of 0.01% and phosphorus, 1.0% titanium diboride and 1.0% niobium dioxide, surplus is iron.
Preferably, the thickness of wearing layer is 3-10mm.
Preferably, described roll body is that rich chromium cast iron and/or steel alloy casting form.
Present invention also offers the preparation method of above-mentioned ceramic grinding roller, it is characterized in that: comprise the steps: that (1) takes each component of wearing layer in described ratio; Put into ball mill mixed grinding 4-6 hour, mix rear metal tape and wrap up mixed-powder, make welding wire through forming machine rolling, the drawing of wire drawing unit, milling drum grinding, polishing unit polishing operation;
(2) adopt open arc overlaying method welding wire built-up welding to be formed wearing layer on the roll body working face of polishing, welding current 190A, weldingvoltage 28V, after continuous built-up welding 3 layers, just form wearing layer.
The present invention, compared with present technology, has following advantage:
(1) wearing layer of the cermet grinding roller of the embodiment of the present invention, using titanium carbide, niobium carbide as main hard phase, other metal-carbide is as auxiliary hard phase, and select iron as binding agent, add molybdenum and vanadium, significantly improve the bond strength of wearing layer, toughness, wearability, and light specific gravity, hardness is high.
(2) wearing layer of the cermet grinding roller of the embodiment of the present invention, molybdenum and vanadium composition, can refinement deposited metal crystal grain effectively due to the solution strengthening effect of molybdenum and vanadium, improve creep resisting ability, resist the fragility of ceramal, improve processability.Moreover, filter course between overlay cladding and roll body can be made to contain a large amount of molybdenums and vanadium, the toughness of transition zone obtains very large raising, can play good transitional function like this between wearing layer and roll body, makes the heap wearing layer of postwelding and the roll body of grinding roller be not easy to peel off.
(3) wearing layer of the cermet grinding roller of the embodiment of the present invention, owing to the addition of a small amount of titanium diboride and niobium dioxide, titanium diboride and niobium dioxide and the hard phase such as titanium carbide, niobium carbide form eutectic, just can sinter at about 1600-1700 DEG C, fully dense wearing layer can have been obtained.Meanwhile, the interface combinations of this kind of combination eutectic is also very good, can form association or partly associate phase boundary, improves very favourable to toughness of material, improves the crack resistance of wearing layer, reduces crackle and produces.
Detailed description of the invention
For making the object of the embodiment of the present invention, technical scheme and advantage clearly, be clearly and completely described below to the technical scheme in the embodiment of the present invention, obviously, described embodiment is the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.It should be noted that, when not conflicting, the embodiment in the application and the feature in embodiment can be combined mutually.
Embodiment 1
Cermet grinding roller comprises roll body and is arranged on the wearing layer on roll body surface, wearing layer can be prepared in the following manner: take various composition by following mass percent example: titanium carbide 20.0%, niobium carbide 5%, chromium carbide 5.0%, boron carbide 1.0%, molybdenum 0.1%, vanadium 0.1%, iron 1.5%, put into ball mill mixed grinding 5 hours (mass percentage that this mixed-powder forms wearing layer is 35.5%), be the sheet iron strip parcel mixed-powder of 0.28mm with thickness after mixing, through forming machine rolling, the drawing of wire drawing unit, milling drum grinding, polishing unit polishing operation makes the welding wire that diameter is 3.2mm.
Above-mentioned welding wire built-up welding becomes the method for wearing layer: adopt open arc overlaying method that welding wire built-up welding is formed wearing layer on the grinding roller working face of polishing, welding current 190A, weldingvoltage 28V, after continuous built-up welding 3 layers, wearing layer case hardness HRC66-69, abrasive wear behavior is 10 times of rich chromium cast iron, bond strength > 160MPa.Wherein, roll body is that rich chromium cast iron and/or steel alloy casting form.
Embodiment 2
Cermet grinding roller comprises roll body and is arranged on the wearing layer on roll body surface, wearing layer can be prepared in the following manner: take various composition by following mass percent example: titanium carbide 15.0%, niobium carbide 8%, chromium carbide 4%, boron carbide 2.0%, molybdenum 0.5%, vanadium 0.5%, sulphur and phosphorus 0.01%, iron 1.5%, put into ball mill mixed grinding 5 hours (mass percentage that this mixed-powder forms wearing layer is 36.5%), be the sheet iron strip parcel mixed-powder of 0.28mm with thickness after mixing, through forming machine rolling, the drawing of wire drawing unit, milling drum grinding, polishing unit polishing operation makes the welding wire that diameter is 3.2mm.
Above-mentioned welding wire built-up welding becomes the method for wearing layer: adopt open arc overlaying method that welding wire built-up welding is formed wearing layer on the grinding roller working face of polishing, welding current 180A, weldingvoltage 25V, after continuous built-up welding 7mm thickness, wearing layer case hardness HRC65-68, abrasive wear behavior is 11 times of rich chromium cast iron, bond strength > 160MPa.Wherein, roll body is that rich chromium cast iron and/or steel alloy casting form.
Embodiment 3
Cermet grinding roller comprises roll body and is arranged on the wearing layer on roll body surface, wearing layer can be prepared in the following manner: take various powder by following mass percent example: titanium carbide 10.0%, niobium carbide 10.0%, chromium carbide 5.0%, boron carbide 1.5%, molybdenum 0.2%, vanadium 0.3%, iron powder 1.0%, put into ball mill mixed grinding 5 hours (mass percentage at welding wire be made up of this mixed-powder is 36.0%), be the sheet iron strip parcel mixed-powder of 0.28mm with thickness after mixing, through forming machine rolling, the drawing of wire drawing unit, milling drum grinding, polishing unit polishing operation makes the welding wire that diameter is 3.2mm.
Above-mentioned welding wire built-up welding becomes the method for wearing layer: adopt open arc overlaying method that welding wire built-up welding is formed wearing layer on the grinding roller working face of polishing, welding current 180A, weldingvoltage 25V, after continuous built-up welding 5mm thickness, wearing layer case hardness HRC68-70, abrasive wear behavior is 12 times of rich chromium cast iron, bond strength > 160MPa.Wherein, roll body is that rich chromium cast iron and/or steel alloy casting form.
Embodiment 4
Cermet grinding roller comprises roll body and is arranged on the wearing layer on roll body surface, wearing layer can be prepared in the following manner: take various powder by following mass percent example: titanium carbide 10.0%, niobium carbide 10.0%, chromium carbide 5.0%, boron carbide 1.5%, molybdenum 0.2%, vanadium 0.3%, iron powder 1.0%, 1.0% titanium diboride and 1.0% niobium dioxide, put into ball mill mixed grinding 5 hours (mass percentage at welding wire be made up of this mixed-powder is 36.0%), be the sheet iron strip parcel mixed-powder of 0.28mm with thickness after mixing, through forming machine rolling, the drawing of wire drawing unit, milling drum grinding, polishing unit polishing operation makes the welding wire that diameter is 3.2mm.
Above-mentioned welding wire built-up welding becomes the method for wearing layer: adopt open arc overlaying method that welding wire built-up welding is formed wearing layer on the grinding roller working face of polishing, welding current 180A, weldingvoltage 25V, after continuous built-up welding 5mm thickness, wearing layer case hardness HRC70-72, abrasive wear behavior is 14 times of rich chromium cast iron, bond strength > 170MPa.Wherein, roll body is that rich chromium cast iron and/or steel alloy casting form.
Last it is noted that above embodiment is only in order to illustrate technical scheme of the present invention, be not intended to limit.Although with reference to previous embodiment to invention has been detailed description, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein portion of techniques feature; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (7)
1. a cermet grinding roller, comprise roll body and the wearing layer being arranged on roll body surface, it is characterized in that: described wearing layer comprises the mixed-powder of following mass percent: the vanadium of the chromium carbide of the titanium carbide of 10.0%-20.0%, the niobium carbide of 5.0%-15.0%, 3.0%-5.0%, the boron carbide of 1.0%-2.0%, 0.1%-0.5%, the molybdenum of 0.1%-0.5%, the sulphur of 0.01%-0.1% and phosphorus, described wearing layer also comprises iron; The mass percentage of described mixed-powder in described wearing layer is 20%-40%.
2. cermet grinding roller according to claim 1, it is characterized in that: described wearing layer is by the component of following mass percent: the titanium carbide of 15.0%, the niobium carbide of 8.0%, 4.0% chromium carbide, 2.0% boron carbide, 0.5% vanadium, the molybdenum of 0.5%, the sulphur of 0.01% and phosphorus, surplus is iron.
3. cermet grinding roller according to claim 1, is characterized in that: the mixed-powder of described wearing layer also comprises 0.5%-2.0% titanium diboride and the 0.5%-2.0% niobium dioxide of following mass percent.
4. cermet grinding roller according to claim 3, it is characterized in that: described wearing layer is mixed by following mass percent: the titanium carbide of 15.0%, the niobium carbide of 8.0%, 4.0% chromium carbide, 2.0% boron carbide, 0.5% vanadium, the molybdenum of 0.5%, the sulphur of 0.01% and phosphorus, 1.0% titanium diboride and 1.0% niobium dioxide, surplus is iron.
5. according to the ceramic grinding roller in claim 1-4 described in any one, it is characterized in that: the thickness of wearing layer is 3-10mm.
6. according to the ceramic grinding roller in claim 1-4 described in any one, it is characterized in that: described roll body is that rich chromium cast iron and/or steel alloy casting form.
7. the preparation method of the ceramic grinding roller according to any one of claim 1-6, is characterized in that: comprise the steps: that (1) takes each component of wearing layer in described ratio; Put into ball mill mixed grinding 4-6 hour, mix rear metal tape and wrap up mixed-powder, make welding wire through forming machine rolling, the drawing of wire drawing unit, milling drum grinding, polishing unit polishing operation;
(2) adopt open arc overlaying method welding wire built-up welding to be formed wearing layer on the roll body working face of polishing, welding current 190A, weldingvoltage 28V, after continuous built-up welding 3 layers, just form wearing layer.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107191472A (en) * | 2017-05-17 | 2017-09-22 | 安徽巨泰机械制造有限公司 | A kind of agricultural machinery high-strength wearable roller |
| CN108620769A (en) * | 2018-07-25 | 2018-10-09 | 安徽卓煌机械设备有限公司 | A kind of cement raw material milling roller surface wear-resistant material |
| CN108855378A (en) * | 2018-07-27 | 2018-11-23 | 安徽卓煌机械设备有限公司 | A kind of high-bond wearing layer cement raw material grinding roller |
| CN109234727A (en) * | 2018-09-30 | 2019-01-18 | 安徽工业大学 | A kind of iron-based Cr of plasma surfacing adding micron Ti3C2Hypereutectic wear-resistant coating and preparation method thereof |
| CN115178739A (en) * | 2022-06-12 | 2022-10-14 | 华能国际电力股份有限公司营口电厂 | Preparation method of vertical mill metal-based ceramic composite grinding roller |
| CN117226075A (en) * | 2023-10-08 | 2023-12-15 | 湖南省品源机械制造有限公司 | Integrally formed bimetal cast roller and casting process thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107191472A (en) * | 2017-05-17 | 2017-09-22 | 安徽巨泰机械制造有限公司 | A kind of agricultural machinery high-strength wearable roller |
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| CN109234727A (en) * | 2018-09-30 | 2019-01-18 | 安徽工业大学 | A kind of iron-based Cr of plasma surfacing adding micron Ti3C2Hypereutectic wear-resistant coating and preparation method thereof |
| CN109234727B (en) * | 2018-09-30 | 2020-05-05 | 安徽工业大学 | Plasma surfacing iron-based Cr added with micron Ti3C2Hypereutectic wear-resistant coating and preparation method thereof |
| CN115178739A (en) * | 2022-06-12 | 2022-10-14 | 华能国际电力股份有限公司营口电厂 | Preparation method of vertical mill metal-based ceramic composite grinding roller |
| CN117226075A (en) * | 2023-10-08 | 2023-12-15 | 湖南省品源机械制造有限公司 | Integrally formed bimetal cast roller and casting process thereof |
| CN117226075B (en) * | 2023-10-08 | 2024-02-23 | 湖南省品源机械制造有限公司 | Manufacturing process of integrally formed bimetal cast roller |
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| CN104959194B (en) | 2017-09-01 |
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Effective date of registration: 20180117 Address after: 102206 Beijing city Changping District Small Town Zhu Daxinzhuang North Agricultural Road No. 2 building D building 15 District No. 1 Patentee after: Beijing Andy Technology Co., Ltd. Address before: 102206 Beijing, Huilongguan, rural road, No. D, block, No. 604, Patentee before: Bao Zhijian |