CN101412090A - Method for preparing composite wear-resistant roller - Google Patents
Method for preparing composite wear-resistant roller Download PDFInfo
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- CN101412090A CN101412090A CNA2008102324902A CN200810232490A CN101412090A CN 101412090 A CN101412090 A CN 101412090A CN A2008102324902 A CNA2008102324902 A CN A2008102324902A CN 200810232490 A CN200810232490 A CN 200810232490A CN 101412090 A CN101412090 A CN 101412090A
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Abstract
The invention discloses a method for preparing a composite antiwear roller, which is characterized by comprising the following steps: alloy dust core bars are bound into bundles and arranged in a roller casting mould cavity, and the volume of the alloy dust core bars accounts for 20 to 60 percent of the total volume of the antiwear roller; molten matrix metal is cast into the casting mould cavity, the alloy dust core bars are melted and dissolved under the heat effect of the matrix metal, a great number of alloy elements and the molten matrix metal generate metallurgical combination reaction so as to generate a highly dispersed alloy structure on the original position; and finally the alloy structure is cooled and solidified, and the bar-shaped hard phase is metallurgically and transitionally combined into a whole with the matrix metal, thereby preparing the composite antiwear roller which takes the high-strength and high-ductility metal as the matrix and contains a certain number of metallurgically combined bar-shaped hard points. The composite antiwear roller has high strength and high ductility of the matrix metal and high hardness and high wear resistance of the hard phase, can simultaneously bear high pressure and strong wear, and has the characteristics of long service life, low price and so on.
Description
Technical field
The present invention relates to the preparation of a kind of cylinder of industry induction systems such as electric power, metallurgy, mine, a kind of preparation method of composite wear-resistant roller particularly, the composite wear-resistant roller of this method preparation, wherein contain the column shaped horniness point, realize the organic unity of wearability and obdurability, made the overall performance of cylinder significantly improve.
Background technology
In industries such as mine, metallurgy, electric power, coal, the conveying of material is very general.In the present material-transporting system, adopt metal roller that steel are processed into mostly as delivery vehicles.Because the wearability of common iron is relatively poor, so that metal roller wear and tear in feed system is very serious, so the service life of metal roller short, change frequently.Cause production cost to improve, labor strength increases, and has had a strong impact on the operate as normal of conveying system.
Summary of the invention
Defective or deficiency at above-mentioned prior art existence, the objective of the invention is to, a kind of preparation method of composite wear-resistant roller is provided, adopt the composite wear-resistant roller of this method preparation, the column shaped horniness point that wherein contains high tough, high abrasion, this column shaped horniness original position in matrix generates, and form metallurgical binding with matrix, make composite wear-resistant roller both have the high strength and the high tenacity of parent metal, the high rigidity and the high-wearing feature that have the hard phase again, can bear high pressure and strong wear simultaneously, have long service life, cheap characteristics.
In order to realize above-mentioned task, the present invention takes following technical solution:
A kind of preparation method of composite wear-resistant roller, it is characterized in that, this method is rolled the alloy powder core bar bundled, be arranged in the cylinder casting mold die cavity, alloy powder core bar bundle accounts for 20%～60% of wearproof roller cumulative volume, then the parent metal of fusing is poured in the casting mold die cavity, under the heat effect of parent metal, the alloy powder core bar melts, dissolving, a large amount of alloying elements and parent metal liquid in the alloy powder core bar produce metallurgical combination reaction, generate highly dispersed alloy structure in position, last cooled and solidified forms bar-shaped hard and combines with the transition of parent metal metallurgy and combine together, and the metal made from high-toughness high-strength is a matrix, include the composite wear-resistant roller of bar-shaped high rigidity particle of the metallurgical binding of some.
The composite wear-resistant roller of the present invention's preparation has the following advantages:
1, owing to adopt the alloy powder core bar, inner filler alloys powder, under the high temperature action of parent metal liquid, alloy powder sintering in the alloy powder core bar, dissolving, diffusion, metallurgical combination reaction takes place with parent metal liquid, simultaneously because the heat-absorbing action of alloy powder, reduced local temperature, shortened crystallization process, hindered the further diffusion of alloying element, thereby made alloying element enrichment in position, the remarkable refinement of crystal grain, separate out the hard compounds of the high rigidity of a large amount of disperses, just formed the hard phase that is bar-shaped on the macroscopic view that is embedded in the parent metal after solidifying, and combine with the transition of parent metal formation excellent metallurgical, the interface is in conjunction with firm, having solved hard easily comes off mutually, a cracked difficult problem has realized the organic unity of wearability and obdurability, and overall performance significantly improves.
2, alloy powder can carry out proportioning according to the instructions for use of workpiece, and composition is adjustable, and is applied widely.
3, because the alloy powder core bar does not contain impurity such as binding agent, therefore can not produce defectives such as slag inclusion, pore, interior tissue is good.
4, composite molding technique controllability of the present invention is strong, yield rate is high, the quality of production is stable, is convenient to large-scale production.
5, column shaped horniness point generates for whole reaction in-situ, avoids cracking phenomena that usually occurs in the technical process such as machinery is compound and the obscission in the use.
6,, can regulate the ratio of column shaped horniness point in matrix, and guarantee to be evenly distributed according to the cylinder applying working condition;
7,, can realize region composite, surface recombination or whole compound according to the design feature of cylinder;
8, according to the cylinder pumped (conveying) medium, can adjust the diameter and the distribute spacing of column shaped horniness point, adapt to the demand of different industries;
Description of drawings
Fig. 1 is that the present invention prepares the composite wear-resistant roller process schematic representation;
Fig. 2 is the front view (cutaway view) of composite wear-resistant roller structure;
Fig. 3 is a composite wear-resistant roller structure vertical view (cutaway view).
Below in conjunction with drawings and Examples the present invention is described in further detail:
The specific embodiment
Referring to accompanying drawing, according to technical scheme of the present invention, select for use the alloy powder core bar 1 of certain diameter to roll bundled, at the core of alloy powder core bar 1 alloy powder of packing into, place in the die cavity of cylinder casting mold 2, the alloy powder core bar accounts for 20%～60% of wearproof roller cumulative volume, then the parent metal liquid of fusing is poured in the die cavity of casting mold 2, alloy powder core bar 1 melts under the heat effect of parent metal 3, the alloy powder sintering, moltenly ooze even dissolve, a large amount of alloying elements and parent metal liquid 3 produce metallurgical combination reaction, alloyed powder metallic element in the alloy powder core bar 1 carries out short-range diffusion in parent metal liquid, generate highly dispersed alloy structure in position, last cooled and solidified forms bar-shaped hard and 4 combines with parent metal 3 metallurgical transition and to combine together mutually, and formation is matrix with the metal of high-toughness high-strength, include the composite wear-resistant roller of bar-shaped high rigidity particle of the metallurgical binding of some.
Above-mentioned alloy powder core bar 1 diameter is Φ 1mm～Φ 10mm, and its crust is 0.1～1mm for the low carbon steel pipe wall thickness, and core is that granularity is 50～200 purpose alloy powders.
The alloy powder of above-mentioned alloy powder core bar 1 core is made of high-carbon chromium iron, can add alloyed powders such as molybdenum-iron powder, ferrotungsten powder, ferrosilicon powder, ferromanganese powder as required.
Alloy powder also can be made of in tungsten carbide, carborundum, titanium carbide, aluminium oxide, silicon nitride, the titanium nitride powder one or more.
Below be the embodiment that the inventor provides, but the present invention is not limited to these embodiment.
Embodiment 1: the preparation high-chromium alloy is that hard phase, A3 steel are the bar-shaped composite wear-resistant roller of matrix
1, it is bundled to select for use the alloy powder core bar 1 of 3mm diameter to roll, and the alloy powder of packing into is a high-carbon chromium iron, and granularity 100～150 orders are cut into the height identical with the cylinder wall thickness;
2, adopt resin sand to require to make wearproof roller casting mold 2 according to casting technique;
3, alloy powder core bar 1 is according to 50% the ratio that accounts for the wearproof roller volume, is arranged in the die cavity of casting mold 2 of wearproof roller;
4, select for use the A3 steel as parent metal 3, after intermediate frequency furnace smelting fusing, reach 1600 ℃ and come out of the stove, molten steel is poured in the die cavity of wearproof roller casting mold 2, till filling with;
5, room temperature cooling, treat the molten metal cooled and solidified after, take out foundry goods, sand removal is handled, promptly make high-chromium alloy and be bar-shaped hard mutually 4, the A3 steel is the composite wear-resistant roller of parent metal 3.
Certainly, according to actual needs, alloy powder also can be selected the mixture of high-carbon chromium iron and molybdenum-iron powder, ferrotungsten powder, ferrosilicon powder, ferromanganese powder.
Embodiment 2: the preparation tungsten carbide is that hard phase, A3 steel are the bar-shaped composite wear-resistant roller of matrix
1, select the alloy powder core bar 1 of 5mm diameter for use, alloy powder is the diamondite powder, and granularity 150 orders are cut into the length identical with cylinder wall thickness;
2, adopt resin sand to require to make casting mold 2 according to casting technique;
3, with alloy powder core bar 1 according to 40% the ratio that accounts for the wearproof roller volume, be preset in the die cavity of wearproof roller casting mold 2;
4, select for use the A3 steel as parent metal 3, after intermediate frequency furnace smelting fusing, reach 1600 ℃ and come out of the stove, molten steel is poured in the die cavity of wearproof roller casting mold 2, till filling with;
5, room temperature cooling, treat the molten metal cooled and solidified after, take out foundry goods, sand removal is handled, promptly making tungsten carbide is that bar-shaped hard phase (4), A3 structure of steel are the composite wear-resistant roller of matrix (3).
Embodiment 3: the preparation tungsten carbide is that hard phase, potassium steel are the bar-shaped composite wear-resistant roller of matrix
1, select the alloy powder core bar 1 of 3mm diameter for use, alloy powder is the diamondite powder, and granularity 50～80 orders are cut into the length identical with cylinder wall thickness;
2, adopt resin sand to require to make casting mold 2 according to casting technique;
3, with alloy powder core bar 1,60% ratio according to accounting for the wearproof roller volume is preset in the die cavity of wearproof roller casting mold 2;
4, select for use potassium steel Mn13 as parent metal 3, after intermediate frequency furnace smelting fusing, reach 1650 ℃ and come out of the stove, molten steel is poured in the die cavity of wearproof roller casting mold 2, till filling with;
5, room temperature cooling, treat the molten metal cooled and solidified after, take out foundry goods, sand removal is handled, promptly make tungsten carbide and be bar-shaped hard mutually 4, potassium steel is organized as the composite wear-resistant roller of matrix 3.
In the foregoing description 2,3, according to different demands, alloy powder can also be selected one or more mixtures in carborundum, titanium carbide, aluminium oxide, silicon nitride or the titanium nitride powder.
In the foregoing description, according to different demands, parent metal 3 can also be selected grey cast-iron or spheroidal graphite cast-iron, all can make qualified composite wear-resistant roller.
Claims (7)
1, a kind of preparation method of composite wear-resistant roller, it is characterized in that, this method is rolled the alloy powder core bar bundled, be arranged in the cylinder casting mold die cavity, alloy powder core bar bundle accounts for 20%～60% of wearproof roller cumulative volume, then the parent metal of fusing is poured in the casting mold die cavity, under the heat effect of parent metal, the alloy powder core bar melts, dissolving, a large amount of alloying elements and parent metal liquid in the alloy powder core bar produce metallurgical combination reaction, generate highly dispersed alloy structure in position, last cooled and solidified forms bar-shaped hard and combines with the transition of parent metal metallurgy and combine together, and the metal made from high-toughness high-strength is a matrix, include the composite wear-resistant roller of bar-shaped high rigidity particle of the metallurgical binding of some.
2. the method for claim 1 is characterized in that, described alloy powder core bar is diameter of phi 1mm～Φ 10mm, and it is 50 orders～200 purpose alloy powders that the low carbon steel pipe of wall thickness 0.1～1mm, core are filled with granularity.
3. method as claimed in claim 2 is characterized in that, described alloy powder is one or more mixtures in tungsten carbide, carborundum, titanium carbide, aluminium oxide, silicon nitride or the titanium nitride powder.
4. method as claimed in claim 2 is characterized in that, described alloy powder is a high-carbon chromium iron, or the mixture of high-carbon chromium iron and molybdenum-iron powder, ferrotungsten powder, ferrosilicon powder, ferromanganese powder.
5, the method for claim 1 is characterized in that, described parent metal is cast steel or cast iron.
6, method as claimed in claim 5 is characterized in that, described cast steel is potassium steel, mild steel or steel alloy.
7, method as claimed in claim 5 is characterized in that, described cast iron is grey cast-iron or spheroidal graphite cast-iron.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008102324902A CN101412090A (en) | 2008-11-28 | 2008-11-28 | Method for preparing composite wear-resistant roller |
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| CNA2008102324902A CN101412090A (en) | 2008-11-28 | 2008-11-28 | Method for preparing composite wear-resistant roller |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106077583A (en) * | 2016-08-22 | 2016-11-09 | 合肥东方节能科技股份有限公司 | A kind of Roll Collar of high abrasion Ceramic Composite and preparation method thereof |
| CN106270458A (en) * | 2016-08-22 | 2017-01-04 | 合肥东方节能科技股份有限公司 | A kind of rolling guide wheel compound based on carbonized ceramic and preparation method thereof |
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2008
- 2008-11-28 CN CNA2008102324902A patent/CN101412090A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106077583A (en) * | 2016-08-22 | 2016-11-09 | 合肥东方节能科技股份有限公司 | A kind of Roll Collar of high abrasion Ceramic Composite and preparation method thereof |
| CN106270458A (en) * | 2016-08-22 | 2017-01-04 | 合肥东方节能科技股份有限公司 | A kind of rolling guide wheel compound based on carbonized ceramic and preparation method thereof |
| CN106077583B (en) * | 2016-08-22 | 2018-05-18 | 合肥东方节能科技股份有限公司 | A kind of Roll Collar of high abrasion Ceramic Composite and preparation method thereof |
| CN106270458B (en) * | 2016-08-22 | 2018-11-09 | 合肥东方节能科技股份有限公司 | A kind of rolling guide wheel and preparation method thereof compound based on carbonized ceramic |
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Open date: 20090422 |