CN102218857B - Composite material coated with SiC-Fe based alloy layer and preparation method of composite material - Google Patents
Composite material coated with SiC-Fe based alloy layer and preparation method of composite material Download PDFInfo
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- CN102218857B CN102218857B CN201110141004.8A CN201110141004A CN102218857B CN 102218857 B CN102218857 B CN 102218857B CN 201110141004 A CN201110141004 A CN 201110141004A CN 102218857 B CN102218857 B CN 102218857B
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Abstract
The invention discloses a composite material coated with a SiC-Fe based alloy layer and a preparation method of the composite material. The composite material coated with the SiC-Fe based alloy layer is formed by coating the SiC-Fe based alloy layer on the surface of a steel base material, wherein the steel base material is carbon steel or alloy steel of which the carbon content is 0.2 to 0.7 weight percent, and the raw material of a SiC-Fe composite material layer is SiC powder and iron-based autolytic alloy powder. The preparation method of the composite material comprises the following steps of: mixing the iron-based autolytic alloy powder with the SiC powder; and spraying the mixture on the surface of the steel base material. The composite material coated with the SiC-Fe based alloy layer has excellent performances of high hardness, good wearing resistance, low brittleness, capability of being subjected to heat treatment and machining, low cost, high performance price ratio and the like, and can obviously improve the surface property of the steel base material.
Description
One, technical field
The present invention relates to a kind of composite and preparation method thereof, is exactly composite being covered with SiC-Fe base alloy-layer and preparation method thereof.
Two, background technology
Particles reiforced metal-base composition not only has the feature that plastic deformation is good, and has advantages of that ceramic particle hardness is high, wearability good simultaneously, thereby demonstrates single metal or the incomparable excellent properties of ceramic particle.By surface engineering technology, prepare one deck as thermal spraying, plasma surfacing, laser melting coating etc. at surface of the work and there is the particulate reinforced metal-based composite coating that high-wearing feature requires, can obviously improve its serviceability, extend its service life.Also there is both at home and abroad the method that adopts surface coating alloy or composite, but the normally expensive composite such as WC-steel composite material, TiC-steel composite material, carbide alloy of the composite of coating.
The composite of above-mentioned surface cladding is except having the shortcoming that cost is high, also have some other deficiencies, as soluble in the WC in WC-steel composite material in matrix, increase matrix phosphorus content and also form herring-bone form carbide and bridge joint phase, make that cladding layer fragility obviously increases, hydraulic performance decline; The wetability of TiC and steel matrix is poor, and interface, in conjunction with weak and easy segregation, easily comes off in use procedure; Bonding few mutually in carbide alloy, composite coating fragility is very large, and it is using Co as bonding phase, can not heat treatment with steel matrix ratio, and cannot regulate its coating performance to reach the effect coordinating with base material better by heat treatment.
Three, summary of the invention
The present invention is for avoiding the existing weak point of above-mentioned prior art, provides that a kind of hardness is high, wear-resisting, anti-corrosion, good heat resistance, fragility is low, cost the is low composite that is covered with SiC-Fe base alloy-layer and preparation method thereof.
Technical solution problem of the present invention adopts following technical scheme:
The feature that the present invention is covered with the composite of SiC-Fe base alloy-layer is: be covered with SiC-Fe base alloy-layer on the surface of steel substrate; Described steel substrate is carbon steel or the steel alloy of phosphorus content 0.2-0.7wt%.
The feature that the present invention is covered with the composite of SiC-Fe base alloy-layer is also: the raw material of described SiC-Fe base alloy-layer is that SiC powder and iron-based are from dissolubility alloyed powder;
Described iron-based is C from dissolubility alloyed powder, Cr, B, Si, Fe, other metal and nonmetalloid;
Described raw material is configured to by mass percentage: SiC powder, be irregular wedge angle form, and 5-40%, C 0.2-0.6%, Cr9.0-17.1%, B 0.5-3%, Si 0-2%, Fe 37.3-80.5%, surplus is other metals and nonmetalloid;
Described other metal and nonmetalloid are to comprise one or more in Ti, Ni, Nb, V, Zr, RE, N, H, O, Al, Cu, W, Co, Ta, Mg, Ca, Zn, K, Y, Sn, Pb, Ba.
The feature that the present invention is covered with the composite of SiC-Fe base alloy-layer is also: the particle diameter of described SiC powder is 50-80 μ m, and described iron-based is 45-109 μ m from the particle diameter of dissolubility alloyed powder.
The feature that the present invention is covered with the preparation method of the composite of SiC-Fe base alloy-layer is: iron-based is sprayed to steel substrate surface after dissolubility alloyed powder and the mixing of SiC powder.
When all multi-work piece work, be subject to strong fretting wear, require its surface must have high wearability.SiC is a kind of hard phase of cheapness, Vickers hardness 33400MPa, SiC particle is distributed in steel matrix, and steel matrix plays the effect of bonding SiC particle and support, SiC particle plays strengthening, sclerosis and wear-resistant effect, and such composite has higher wearability.At this composite of the deposited one deck of the surface of the work that requires surface abrasion resistance, can effectively improve surface of the work wearability, the amplitude that cost improves is simultaneously very little.In the sintering process preparation process of SiC-steel composite material, because SiC reacts under fusion temperature with steel acutely, on the interface between SiC and steel, generate thicker conversion zone, make faying face embrittlement, poor performance.The present invention adopts the SiC powder of imbedding surface diposition pre-coated Cr through powder; and use the method for plasma spray; burn-off rate is fast; high-temperature residence time is short; interfacial reaction is less, and atmosphere protection can anti-oxidation, decarburization, the generation of defect such as be mingled with, therefore the combination of SiC and steel is better; hard particles is incrust, and the strong hardness of composite, toughness, wearability are more excellent.
The performance of the composite of surface deposited metal also depends in composite the composition as the steel of Binder Phase.In steel as Binder Phase in the composite of the prepared surface deposited metal of the present invention, add suitable alloying element, made a concrete analysis of as follows:
The content of C, between 0.20-0.60wt% (percentage by weight, lower with), can ensure the intensity that steel matrix had, the cooperation of toughness, makes it can support SiC particle and guarantee composite material toughness; 13% and above Cr can improve corrosion resistance, heat resistance, the intensity of steel, can more obviously improve the impact flexibility of steel, can improve the non-oxidizability of steel; B can improve the surface forming performance of cladding layer, and Si can improve corrosion resistance and the intensity of cladding layer matrix, and Mo, Ti, V can crystal grain thinnings, Ni can improve quenching degree and the corrosion resistance of steel greatly, Mn can improve alloy rigidity, and RE can purify, crystal grain thinning, improves SiC and is combined with the interface of steel.
With respect to the overall wear-resisting workpiece of domestic and international use, the present invention due to by deposited SiC composite in carbon steel or low-alloy steel substrate surface, steel substrate alloying element is few, cost is low, overlay is thinner, and SiC and Fe base alloy inexpensive, so, it is low that the metal surface particle of making strengthens composite cladding layer cost, and cost performance is high.Strengthen Fe base alloy composite cladding layer performance good WC-Ni base alloy composite cladding layer with respect to metal surface particle, the present invention due to adopt SiC as hard phase, Fe base alloy as matrix, cost obviously reduces.With respect to matrix only contain less than 3.0% Cr, do not add the SiC composite cladding layer of a small amount of B, the present invention, due to the matrix that employing contains 7.8～17.1% Cr (amount in cladding layer in the matrix outside SiC Cr weight percentage be 13～18%), 0.5～3% B, has advantages of high corrosion resistance, heat resistance and surface forming performance.
Compared with the prior art, beneficial effect of the present invention is embodied in:
1, in composite of the present invention, form SiC-steel composite material coating taking SiC particle as hard-phase particles, SiC has the effect of strengthening, sclerosis, raising wearability, steel matrix has bonding hard-phase particles, ensures the effect of toughness, intensity, heat-treatability and the machinability of material.Compared with the surface deposited metal material such as WC-steel composite material, TiC-steel composite material in prior art, there is the feature of with low cost, abundant raw materials, saving precious metal.
2, the matrix using the Fe base alloy containing high Cr as composite cladding layer in composite of the present invention, wherein more than 13% Cr of percentage by weight can effectively improve the electrode potential of matrix alloy, improves corrosion resistance and non-oxidizability; B has the effect that improves surface fused coating surface forming performance.Only contain not enough 3.0%Cr with matrix in guide roller surface SiC composite cladding layer in prior art, do not add compared with a small amount of B, it has advantages of high corrosion resistance, heat resistance and surface forming performance.
3, the surface application methods such as composite material by adopting thermal spraying of the present invention or hot surfacing or laser cladding is coated on substrate surface, and it is combined with base material, and technique is simple, cost is low.
Four, detailed description of the invention
Below by detailed description of the invention, the invention will be further described.
In table 1 embodiment 1-7, the raw material of SiC-Fe base alloy-layer is constructed as follows by mass percentage:
Embodiment 1:
The composite that is covered with SiC-Fe base alloy-layer in the present embodiment is to be covered with SiC-Fe base alloy-layer on the surface of steel substrate; Wherein steel substrate is the carbon steel of phosphorus content 0.2-0.7wt%, and the raw material of SiC-Fe base alloy-layer forms by mass percentage in table 1.Wherein the particle diameter of SiC powder is 50-80 μ m, and iron-based is 45-109 μ m from the particle diameter of dissolubility alloyed powder.
The preparation method that the present embodiment is covered with the composite of SiC-Fe base alloy-layer is coated on steel substrate surface by the method for plasma spray by iron-based after dissolubility alloyed powder and the mixing of SiC powder, forms composite cladding layer, and it is combined with steel substrate.
Bead-welding technology parameter is as follows: electric current 130A, speed of travel 90mm/min, hunting frequency 22min
-1, swing width 20mm, Fe base alloyed powder powder feed rate 30g/min, SiC powder powder feed rate 7g/min, plasma gas Ar 5L/min, powder feeding gas Ar5L/min, protective gas Ar 13L/min.
Embodiment 2:
The composite that is covered with SiC-Fe base alloy-layer in the present embodiment is to be covered with SiC-Fe base alloy-layer on the surface of steel substrate; Wherein steel substrate is the steel alloy of phosphorus content 0.2-0.7wt%, and the raw material of SiC-Fe base alloy-layer forms by mass percentage in table 1.Wherein the particle diameter of SiC powder is 50-80 μ m, and iron-based is 45-109 μ m from the particle diameter of dissolubility alloyed powder.
The preparation method that the present embodiment is covered with the composite of SiC-Fe base alloy-layer is coated on steel substrate surface by the method for plasma spray by iron-based after dissolubility alloyed powder and the mixing of SiC powder, forms composite cladding layer, and it is combined with steel substrate.
Bead-welding technology parameter is as follows: electric current 130A, speed of travel 90mm/min, hunting frequency 22min
-1, swing width 20mm, Fe base alloyed powder powder feed rate 30g/min, SiC powder powder feed rate 10g/min, plasma gas Ar 5L/min, powder feeding gas Ar 5L/min, protective gas Ar 13L/min.
Embodiment 3:
The composite that is covered with SiC-Fe base alloy-layer in the present embodiment is to be covered with SiC-Fe base alloy-layer on the surface of steel substrate; Wherein steel substrate is the carbon steel of phosphorus content 0.2-0.7wt%, and the raw material of SiC-Fe base alloy-layer forms by mass percentage in table 1.Wherein the particle diameter of SiC powder is 50-80 μ m, and iron-based is 45-109 μ m from the particle diameter of dissolubility alloyed powder.
The preparation method that the present embodiment is covered with the composite of SiC-Fe base alloy-layer is coated on steel substrate surface by the method for plasma spray by iron-based after dissolubility alloyed powder and the mixing of SiC powder, forms composite cladding layer, and it is combined with steel substrate.
Bead-welding technology parameter is as follows: electric current 130A, speed of travel 90mm/min, hunting frequency 22min
-1, swing width 20mm, Fe base alloyed powder powder feed rate 30g/min, SiC powder powder feed rate 10g/min, plasma gas Ar 5L/min, powder feeding gas Ar 5L/min, protective gas Ar 13L/min.
Embodiment 4:
The composite that is covered with SiC-Fe base alloy-layer in the present embodiment is to be covered with SiC-Fe base alloy-layer on the surface of steel substrate; Wherein steel substrate is the steel alloy of phosphorus content 0.2-0.7wt%, and the raw material of SiC-Fe base alloy-layer forms by mass percentage in table 1.Wherein the particle diameter of SiC powder is 50-80 μ m, and iron-based is 45-109 μ m from the particle diameter of dissolubility alloyed powder.
The preparation method that the present embodiment is covered with the composite of SiC-Fe base alloy-layer is coated on steel substrate surface by the method for plasma spray by iron-based after dissolubility alloyed powder and the mixing of SiC powder, forms composite cladding layer, and it is combined with steel substrate.
Bead-welding technology parameter is as follows: electric current 130A, speed of travel 90mm/min, hunting frequency 22min
-1, swing width 20mm, Fe base alloyed powder powder feed rate 30g/min, SiC powder powder feed rate 10g/min, plasma gas Ar 5L/min, powder feeding gas Ar 5L/min, protective gas Ar 13L/min.
Embodiment 5:
The composite that is covered with SiC-Fe base alloy-layer in the present embodiment is to be covered with SiC-Fe base alloy-layer on the surface of steel substrate; Wherein steel substrate is the carbon steel of phosphorus content 0.2-0.7wt%, and the raw material of SiC-Fe base alloy-layer forms by mass percentage in table 1.Wherein the particle diameter of SiC powder is 50-80 μ m, and iron-based is 45-109 μ m from the particle diameter of dissolubility alloyed powder.
The preparation method that the present embodiment is covered with the composite of SiC-Fe base alloy-layer is coated on steel substrate surface by the method for plasma spray by iron-based after dissolubility alloyed powder and the mixing of SiC powder, forms composite cladding layer, and it is combined with steel substrate.
Bead-welding technology parameter is as follows: electric current 130A, speed of travel 90mm/min, hunting frequency 22min
-1, swing width 20mm, Fe base alloyed powder powder feed rate 30g/min, SiC powder powder feed rate 10g/min, plasma gas Ar 5L/min, powder feeding gas Ar 5L/min, protective gas Ar 13L/min.
Embodiment 6:
The composite that is covered with SiC-Fe base alloy-layer in the present embodiment is to be covered with SiC-Fe base alloy-layer on the surface of steel substrate; Wherein steel substrate is the steel alloy of phosphorus content 0.2-0.7wt%, and the raw material of SiC-Fe base alloy-layer forms by mass percentage in table 1.Wherein the particle diameter of SiC powder is 50-80 μ m, and iron-based is 45-109 μ m from the particle diameter of dissolubility alloyed powder.
The preparation method that the present embodiment is covered with the composite of SiC-Fe base alloy-layer is coated on steel substrate surface by the method for plasma spray by iron-based after dissolubility alloyed powder and the mixing of SiC powder, forms composite cladding layer, and it is combined with steel substrate.
Bead-welding technology parameter is as follows: electric current 130A, speed of travel 90mm/min, hunting frequency 22min
-1, swing width 20mm, Fe base alloyed powder powder feed rate 30g/min, SiC powder powder feed rate 10g/min, plasma gas Ar 5L/min, powder feeding gas Ar 5L/min, protective gas Ar 13L/min.
Embodiment 7:
The composite that is covered with SiC-Fe base alloy-layer in the present embodiment is to be covered with SiC-Fe base alloy-layer on the surface of steel substrate; Wherein steel substrate is the carbon steel of phosphorus content 0.2-0.7wt%, and the raw material of SiC-Fe base alloy-layer forms by mass percentage in table 1.Wherein the particle diameter of SiC powder is 50-80 μ m, and iron-based is 45-109 μ m from the particle diameter of dissolubility alloyed powder.
The preparation method that the present embodiment is covered with the composite of SiC-Fe base alloy-layer is coated on steel substrate surface by the method for plasma spray by iron-based after dissolubility alloyed powder and the mixing of SiC powder, forms composite cladding layer, and it is combined with steel substrate.
Bead-welding technology parameter is as follows: electric current 130A, speed of travel 90mm/min, hunting frequency 22min
-1, swing width 20mm, Fe base alloyed powder powder feed rate 30g/min, SiC powder powder feed rate 10g/min, plasma gas Ar 5L/min, powder feeding gas Ar 5L/min, protective gas Ar 13L/min.
In embodiment 1, SiC plays humidification in composite, can improve Wear Resistance.Because relative amount is few, wearability increase rate is limited.But because the continuity of matrix is good, composite material toughness is good, in the time bearing contact stress, be difficult for occurring brittle flaking off.The weight percentage of Cr is 12.5% (amounting to into the matrix Cr weight percentage except SiC in cladding layer is 13.0%), can ensure corrosion resistance and non-oxidizability that cladding layer alloy has had.Its case hardness can reach 520HV
0.1, the 1 hour volume wear 1.95mm recording under MM200 abrasion tester (oil lubrication, 200r/min, to bull ring hardness 67HRC) condition
3.
In embodiment 2, SiC amount doubles compared with first group, and hard particles obviously improves the humidification of composite, and abrasion-resistance is good than first group.Add the elements such as a certain amount of Si, can improve the heat resistance of composite, C amount slightly reduces simultaneously, can improve the toughness of composite, and result will cause the raising of composite thermal fatigue resistance; Mo has invigoration effect, the effect that Ti, V have crystal grain thinning, improve intensity and plasticity and toughness; RE can purify, thinning microstructure.In the time of some surface cladding workpiece work, surface of the work can be subject to the effect of heating, Quench repeatedly, and heat fatigue is peeled off and fracture is one of its main failure forms, and the composite of mentioned component can have the ability that good thermal fatigue resistance peels off and ruptures.Its case hardness can reach 632HV
0.1, the 1 hour volume wear 1.67mm recording under above-mentioned condition
3.
In embodiment 3, SiC amount further increases compared with second group, and hard particles improves the humidification of composite, and abrasion-resistance is good than second group.Because the element such as Cr, Mo adding is than (amounting to into the matrix Cr weight percentage except SiC in cladding layer is 15%) more than second group, can improve the heat resistance of composite and the ability that thermal fatigue resistance peels off and ruptures.Ti, V amount be kept to 0, can reduce costs, but crystal grain thinning, improve intensity effect decline.But because Mn amount is also kept to 0, composite grain coarsening reduction in propensity, unlikely too alligatoring.Increase by 0.1% phosphorus content, can increase the hardness of composite.Above-mentioned composite has good wearability, thermal fatigue resistance, and cost is low compared with second group.B content increases, and its cladding layer surface forming performance improves, and surface quality improves.Its case hardness can reach 687HV
0.1, the 1 hour volume wear 1.15mm recording under above-mentioned condition
3.
In embodiment 4, SiC amount further increases compared with the 3rd group, and hard particles improves the humidification of composite, and abrasion-resistance is good than the 3rd group.Cr weight percentage is 11.3%, and amounting in cladding layer Cr weight percentage in the matrix outside SiC is 15%, identical with the 3rd group).Because the steel percentage as Binder Phase in composite declines, the toughness of composite can decline, and fragility can increase, and adds Ni to be improved the effect of toughness.Its case hardness can reach 780HV
0.1, the 1 hour volume wear 0.72mm recording under MM200 abrasion tester (oil lubrication, 200r/min, to bull ring hardness 67HRC) condition
3.
In embodiment 5, SiC amount obviously increases compared with the 4th group, Cr weight percentage is 9.0%, and amounting in cladding layer Cr weight percentage in the matrix outside SiC is 15%, identical with the 3rd group), hardness, the wearability of composite are very high, and its case hardness can reach 975HV
0.1, the 1 hour volume wear 0.36mm recording under above-mentioned condition
3, but alloying element amount is large, and cost is high.There is toughness, heat resistance, the thermal fatigue resistance that can obviously improve in composite as the steel of Binder Phase in a large amount of alloying elements, can improve composite due to the ratio of steel decline toughness and the fatigue resistance of sacrificing.
In embodiment 6, C amount slightly increases compared with the 5th group, favourable to improving hardness and wearability, Cr weight percentage is 17.1%, amounting in cladding layer Cr weight percentage in the matrix outside SiC is 28.5%, Cr content obviously increases compared with the 5th group, and the corrosion resistance to cladding layer, heat resistance, hardness improve favourable.Its case hardness can reach 1030HV
0.1, the 1 hour volume wear 0.30mm recording under above-mentioned condition
3.
In embodiment 7, C amount has obvious reduction compared with the 5th group, favourable to improving composite surface material toughness, can reduce the possibility that face crack produces, and alloying element content obviously reduces simultaneously, can reduce cost of alloy, but hardness decreases.Its case hardness can reach 942HV
0.1, the 1 hour volume wear 0.89mm recording under above-mentioned condition
3.
Metal surface of the present invention SiC-Fe base alloy composite materials has higher wearability (improving 2-3 doubly than Cr12MoV steel deflector roll wearability) compared with the rod-rolling mill hot rolling Roll Collar of surface cladding rod-rolling mill hot rolling Roll Collar and other materials.In use, without fracture, the life-span is improved 2.5 times than Cr12MoV steel wire rod milling train hot rolling Roll Collar.Cost and Cr12MoV steel deflector roll are basic identical, reduce by 50% than carbide alloy deflector roll, reduce by 30% than high-speed steel deflector roll.
Claims (5)
1. the composite that is covered with SiC-Fe base alloy-layer, is characterized in that: be covered with SiC-Fe base alloy-layer on the surface of steel substrate; Described steel substrate is carbon steel or the steel alloy of phosphorus content 0.2-0.7wt%;
The raw material of described SiC-Fe base alloy-layer be SiC powder and iron-based from dissolubility alloyed powder,
Described iron-based is C from dissolubility alloyed powder, Cr, B, Si, Fe, other metal and nonmetalloid;
Described raw material is configured to by mass percentage: SiC powder 10%, C 0.4%, Cr 12.5%, B 0.5%, Si 0.5%, Fe 72.4%, Ti 1.0%, Mn 1.0%, V 0.5%, RE 0.2%, Mo 1.0%;
The particle diameter of described SiC powder is 50-80 μ m, and described iron-based is 45-109 μ m from the particle diameter of dissolubility alloyed powder;
The composite of the described SiC-Fe of being covered with base alloy-layer is that iron-based is coated on to steel substrate surface by the method for plasma spray after dissolubility alloyed powder and SiC powder mix, formation composite cladding layer, the composite obtaining after it is combined with steel substrate; The technological parameter of plasma spray is as follows: electric current 130A, speed of travel 90mm/min, hunting frequency 22min
-1, swing width 20mm, Fe base alloyed powder powder feed rate 30g/min, SiC powder powder feed rate 7g/min, plasma gas Ar 5L/min, powder feeding gas Ar 5L/min, protective gas Ar 13L/min.
2. the composite that is covered with SiC-Fe base alloy-layer, is characterized in that: be covered with SiC-Fe base alloy-layer on the surface of steel substrate; Described steel substrate is carbon steel or the steel alloy of phosphorus content 0.2-0.7wt%;
The raw material of described SiC-Fe base alloy-layer be SiC powder and iron-based from dissolubility alloyed powder,
Described iron-based is C from dissolubility alloyed powder, Cr, B, Si, Fe, other metal and nonmetalloid;
Described raw material is configured to by mass percentage: SiC powder 15%, C 0.5%, Cr 12.8%, B 1.0%, Si 1.0%, Fe 67.7%, Mo 2.0%;
The particle diameter of described SiC powder is 50-80 μ m, and described iron-based is 45-109 μ m from the particle diameter of dissolubility alloyed powder;
The composite of the described SiC-Fe of being covered with base alloy-layer is that iron-based is coated on to steel substrate surface by the method for plasma spray after dissolubility alloyed powder and SiC powder mix, formation composite cladding layer, the composite obtaining after it is combined with steel substrate; The technological parameter of plasma spray is as follows: electric current 130A, speed of travel 90mm/min, hunting frequency 22min
-1, swing width 20mm, Fe base alloyed powder powder feed rate 30g/min, SiC powder powder feed rate 7g/min, plasma gas Ar 5L/min, powder feeding gas Ar 5L/min, protective gas Ar 13L/min.
3. the composite that is covered with SiC-Fe base alloy-layer, is characterized in that: be covered with SiC-Fe base alloy-layer on the surface of steel substrate; Described steel substrate is carbon steel or the steel alloy of phosphorus content 0.2-0.7wt%;
The raw material of described SiC-Fe base alloy-layer be SiC powder and iron-based from dissolubility alloyed powder,
Described iron-based is C from dissolubility alloyed powder, Cr, B, Si, Fe, other metal and nonmetalloid;
Described raw material is configured to by mass percentage: SiC powder 25%, C 0.3%, Cr 11.3%, B 1.0%, Si 1.0%, Fe 60.2%, Ni 0.5%, Zr 0.2%, Mo 0.5%;
The particle diameter of described SiC powder is 50-80 μ m, and described iron-based is 45-109 μ m from the particle diameter of dissolubility alloyed powder;
The composite of the described SiC-Fe of being covered with base alloy-layer is that iron-based is coated on to steel substrate surface by the method for plasma spray after dissolubility alloyed powder and SiC powder mix, formation composite cladding layer, the composite obtaining after it is combined with steel substrate; The technological parameter of plasma spray is as follows: electric current 130A, speed of travel 90mm/min, hunting frequency 22min
-1, swing width 20mm, Fe base alloyed powder powder feed rate 30g/min, SiC powder powder feed rate 7g/min, plasma gas Ar 5L/min, powder feeding gas Ar 5L/min, protective gas Ar 13L/min.
4. the composite that is covered with SiC-Fe base alloy-layer, is characterized in that: be covered with SiC-Fe base alloy-layer on the surface of steel substrate; Described steel substrate is carbon steel or the steel alloy of phosphorus content 0.2-0.7wt%;
The raw material of described SiC-Fe base alloy-layer be SiC powder and iron-based from dissolubility alloyed powder,
Described iron-based is C from dissolubility alloyed powder, Cr, B, Si, Fe, other metal and nonmetalloid;
Described raw material is configured to by mass percentage: SiC powder 40%, C 0.5%, Cr 9.0%, B 2.0%, Si 1.5%, Fe 42.5%, Ti 1.0%, Ni 1.0%, V 0.3%, RE 0.2%, Mo 2.0%;
The particle diameter of described SiC powder is 50-80 μ m, and described iron-based is 45-109 μ m from the particle diameter of dissolubility alloyed powder;
The composite of the described SiC-Fe of being covered with base alloy-layer is that iron-based is coated on to steel substrate surface by the method for plasma spray after dissolubility alloyed powder and SiC powder mix, formation composite cladding layer, the composite obtaining after it is combined with steel substrate; The technological parameter of plasma spray is as follows: electric current 130A, speed of travel 90mm/min, hunting frequency 22min
-1, swing width 20mm, Fe base alloyed powder powder feed rate 30g/min, SiC powder powder feed rate 7g/min, plasma gas Ar 5L/min, powder feeding gas Ar 5L/min, protective gas Ar 13L/min.
5. the composite that is covered with SiC-Fe base alloy-layer, is characterized in that: be covered with SiC-Fe base alloy-layer on the surface of steel substrate; Described steel substrate is carbon steel or the steel alloy of phosphorus content 0.2-0.7wt%;
The raw material of described SiC-Fe base alloy-layer be SiC powder and iron-based from dissolubility alloyed powder,
Described iron-based is C from dissolubility alloyed powder, Cr, B, Si, Fe, other metal and nonmetalloid;
Described raw material is configured to by mass percentage: SiC powder 40%, C 0.6%, Cr 17.1%, B 3.0%, Si 2.0%, Fe 37.3%;
The particle diameter of described SiC powder is 50-80 μ m, and described iron-based is 45-109 μ m from the particle diameter of dissolubility alloyed powder;
The composite of the described SiC-Fe of being covered with base alloy-layer is that iron-based is coated on to steel substrate surface by the method for plasma spray after dissolubility alloyed powder and SiC powder mix, formation composite cladding layer, the composite obtaining after it is combined with steel substrate; The technological parameter of plasma spray is as follows: electric current 130A, speed of travel 90mm/min, hunting frequency 22min
-1, swing width 20mm, Fe base alloyed powder powder feed rate 30g/min, SiC powder powder feed rate 7g/min, plasma gas Ar 5L/min, powder feeding gas Ar 5L/min, protective gas Ar 13L/min.
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| CN102383022B (en) * | 2011-11-14 | 2013-03-06 | 王华彬 | Method for preparing high-TiC-content iron base metal ceramic material through combustion synthesis |
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