A kind of excavator high-strength wearable bucket tooth and its preparation technologyTechnical field
The present invention relates to excavator bucket teeth preparing technical field, a kind of excavator of specific design with high-strength wearable bucket tooth and itsPreparation technology.
Background technology
The bucket of excavator front end is the main portions of work, and the bucket tooth on bucket is the main consumable accessory on excavator,Because the working environment of excavator is typically relatively severe, excavator with bucket tooth or tooth lip because contacting all kinds of materials for a long time, it is maximumMonodentate is pressurized to rub up to 150-200MPa, bottom surface half with ground, therefore, the high requirement of comparison is proposed to the material of bucket tooth,Should intensity it is high, wear-resisting, flexible again, the service life ability president of such bucket tooth, it is therefore necessary to by rationally changing materialMatter improves the service life of bucket tooth.Existing high-strength alloy matches except the adjustment to alloy steel products prime element itself, togetherWhen also can to steel alloy outer layer plate set wearing layer to improve service life, such as using alloy welding deposit technology in Q235 steel or common carbonThe direct hardfacing alloy welding rod of plain steel workpiece surface or welding wire, matrix is divided to two aspects with antifriction alloy, to improve friction durability, butBe wearing layer in long-time by external material impact wear, or expanded with heat and contract with cold for a long time under thermal condition, alloy-layer can be producedFatigue stress causes granular peeling, cracking.Therefore, it is necessary to develop steel alloy and good high-strength of associativity of high comprehensive performanceWearing layer.
The content of the invention
For above-mentioned problem, the present invention proposes a kind of excavator high-strength wearable bucket tooth and its preparation technology,By rational formula combination and outer wear-resistant, the setting of anticorrosive coat, obtained product hardness, intensity are high, have excellent resistance toImpact resistance is ground, service life length, there is very high economic value and social benefit.
In order to realize above-mentioned purpose, the present invention uses following technical scheme：
A kind of excavator high-strength wearable bucket tooth, including steel alloy main body, wear-resisting infiltration layer, corrosion-inhibiting coating, the steel alloyMain body includes following percentage composition component：C 0.34-0.37%, Si0.8-1.2%, Mn 0.65-0.7%, Mo 0.3-0.45%th, Cr2.8-3.3%, Ti 0.25-0.28%, Ni 0.1-0.15%, Y 0.18-0.2%, surplus are that Fe and Bi Ke is kept awayThe impurity exempted from, the wear-resisting infiltration layer are the more first infiltration layers of Al-Mo-La-Cr, and the corrosion-inhibiting coating is organic siliconresin composite coating.
Preferably, steel alloy main body also includes B 0-0.2%, Nb 0-0.2%.
Preferably, wear-resisting infiltration layer uses double glow plasma surface alloying technique, and wear-resisting alloying layer thickness is 65-80 μm.
Preferably, alumina whisker, kaolin and silica flour are contained in organic siliconresin composite coating, and three accounts for respectively5-9%, 10-20%, 5-20% of corrosion-inhibiting coating gross mass, the corrosion-inhibiting coating thickness are 0.8-1.3mm.
Preferably, in wear-resisting infiltration layer each metallic element percentage composition be Mo 15-25%, La5-12%, Cr 15-25%,Al surpluses.
Preferably, excavator high-strength wearable bucket tooth, it is characterised in that preparation technology is as follows：
1) take raw material to be placed in intermediate frequency furnace by constituent content proportioning to melt, sampling is quenched, obtains molten iron after spheroidization and inoculation；
2) it is 1330 ± 5 DEG C to adjust molten iron temperature, moulding by casting, casting crude product is obtained after the demoulding, first carries out casting crude productSurface treatment, is then heat-treated, produces steel alloy main body；
3) by Al-Mo-La-Cr powder fusion metallurgies pour into a mould sintered plate does source electrode, in 10kW furnace for double-layer metallic glow ion cementationIn steel alloy main body is entered row metal multicomponewnt cementation plating, obtain polynary plating steel alloy and carry out secondary heat treatment；
4) the multicomponewnt cementation alloy plating steel after heat treatment is polished, cleaned and dried, it is then organic in its surface sprayingSilicones composite coating, excavator high-strength wearable bucket tooth is produced after drying to be coated.
Preferably, raw material is selected from foundry return, the pig iron, steel scrap, ferrosilicon, ferromanganese, molybdenum-iron, ferrochrome, ferrotianium, nickel in step 1)Iron, yttrium iron.
Preferably, surface treatment includes impeller blasting, surface polishing in step 2), and heat treatment specially first will surface treatmentCasting crude product afterwards is heated to 400-420 DEG C, is incubated 1-1.5h, is then warming up to 790-880 DEG C again, is incubated 2-4h, Ran HoujinRow oil quenching, it is 300-350 DEG C that casting crude product surface temperature is controlled after the completion of oil quenching, is sent into isothermal holding 2-4h in holding furnace, takesGo out rear air cooling.
Preferably, secondary heat treatment is specially first heated to 900-920 DEG C of insulation 0.5-1.5h in step 3), then heats up1150-1180 DEG C of insulation 0.5-1h, then carries out water quenching, continues to be warming up to 5 DEG C/min speed after the completion of water quenching again500-550 DEG C, 20-30min is incubated, then takes out water cooling.
Due to using above-mentioned technical scheme, the beneficial effects of the invention are as follows：Steel alloy main element proportioning of the present invention is closedReason, hardness is up to more than 300HV, and impact flexibility is up to 28J/cm2, tensile strength is more than up to more than 1830MPa, elongation6.8%, the wear-resisting infiltration layer of complexed metal substantially increases wear-resisting intensity, and wear-resisting layer surface intensity is and resistance to up to more than 1000HVGrind infiltration layer and inner alloy steel main body, external layer preservation apply interlayer adhesion it is strong, resistance to flaking is strong, obtained product hardness, by forceDegree is high, has excellent wear resistant and impact resistant, service life length, 3 is improved compared to traditional steel alloy bucket tooth service lifeMore than times, there is very high economic value and social benefit.
Wear-resisting infiltration layer interpenetrates with steel alloy main element, and wear-resisting infiltration layer is using Al elements as main matrix element, and oneDuring the long-term use of aspect after heat treatment, the meeting outer layers migration of Al elements, passivation protection effect, another aspect table are improvedAlumina whisker in layer anti-corrosion soil layer can interconnect with Al elements, while coordinate kaolin space to be fitted together to, and substantially increaseThe peel strength of corrosion-inhibiting coating；In addition, conjunction on the one hand can be improved containing substantial amounts of Intensive intervention elements Mo, Cr in wear-resisting deep layerThe strong hardness of golden steel main body, be on the other hand advantageous to interpenetrate with steel alloy main body, heterogeneous microstructure associativity is strong；WhereinRare earth element yttrium, lanthanum can improve structure refinement degree, while can improve the fatigue resistance and impact resistance of arrangement, and lanthanum elementIt with certain external migration, can be combined with external layer preservation coating, effectively extend the protection efficiency of external layer preservation coating, improvedActive duty cycle.
Embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention,Technical scheme in the embodiment of the present invention is clearly and completely described.Based on embodiments of the invention, the common skill in this areaThe every other embodiment that art personnel are obtained under the premise of creative work is not made, belong to the model that the present invention protectsEnclose.
Embodiment 1：
A kind of excavator high-strength wearable bucket tooth, it is characterised in that including steel alloy main body, wear-resisting infiltration layer, corrosion-inhibiting coating,The steel alloy main body includes following percentage composition component：C 0.36%, Si 0.9%, Mn 0.65%, Mo 0.35%, Cr2.8%th, Ti 0.26%, Ni 0.1%, Y 0.18%, surplus are Fe and than evitable impurity, and the wear-resisting infiltration layer is Al-The more first infiltration layers of Mo-La-Cr, the corrosion-inhibiting coating are organic siliconresin composite coating.
Steel alloy main body also includes B 0%, Nb 0.1%；In wear-resisting infiltration layer each metallic element percentage composition be Mo 15%,La 7%, Cr 15%, Al surpluses；Contain alumina whisker, kaolin and silica flour, and three in organic siliconresin composite coatingPerson accounts for 8%, 10%, the 10% of corrosion-inhibiting coating gross mass respectively.
Excavator high-strength wearable bucket tooth, preparation technology are as follows：
1) take raw material to be placed in intermediate frequency furnace by constituent content proportioning to melt, sampling is quenched, obtains molten iron after spheroidization and inoculation；
2) it is 1330 ± 5 DEG C to adjust molten iron temperature, moulding by casting, casting crude product is obtained after the demoulding, first carries out casting crude productSurface treatment, is then heat-treated, produces steel alloy main body；Surface treatment includes impeller blasting, surface polishing, heat treatment toolBody is incubated 1.5h, is then warming up to 790 DEG C again, be incubated 4h, so for the casting crude product after surface treatment first is heated into 400 DEG CAfter carry out oil quenching, controlled after the completion of oil quenching casting crude product surface temperature be 320 DEG C, be sent into holding furnace in isothermal holding 3h, take outAir cooling afterwards；
3) by Al-Mo-La-Cr powder fusion metallurgies pour into a mould sintered plate does source electrode, in 10kW furnace for double-layer metallic glow ion cementationIn steel alloy main body is entered row metal multicomponewnt cementation plating, obtain polynary plating steel alloy and carry out secondary heat treatment；Secondary heat treatment hasTo be first heated to 900 DEG C of insulation 1.5h, then heat up body 1150 DEG C of insulation 1h, water quenching is then carried out again, with 5 after the completion of water quenchingDEG C/min speed continues to be warming up to 500 DEG C, 30min is incubated, then takes out water cooling；
4) the multicomponewnt cementation alloy plating steel after heat treatment is polished, cleaned and dried, it is then organic in its surface sprayingSilicones composite coating, excavator high-strength wearable bucket tooth is produced after drying to be coated.
Embodiment 2：
A kind of excavator high-strength wearable bucket tooth, it is characterised in that including steel alloy main body, wear-resisting infiltration layer, corrosion-inhibiting coating,The steel alloy main body includes following percentage composition component：C 0.34%, Si 0.8%, Mn 0.68%, Mo 0.42%, Cr3%th, Ti 0.25%, Ni 0.12%, Y 0.18%, surplus are Fe and than evitable impurity, and the wear-resisting infiltration layer is Al-The more first infiltration layers of Mo-La-Cr, the corrosion-inhibiting coating are organic siliconresin composite coating.
Steel alloy main body also includes B 0%, Nb 0%；Each metallic element percentage composition is Mo 20%, La in wear-resisting infiltration layer10%th, Cr 20%, Al surpluses；Contain alumina whisker, kaolin and silica flour, and three in organic siliconresin composite coating9%, 15%, the 15% of corrosion-inhibiting coating gross mass is accounted for respectively；
Excavator high-strength wearable bucket tooth, preparation technology are as follows：
1) take raw material to be placed in intermediate frequency furnace by constituent content proportioning to melt, sampling is quenched, obtains molten iron after spheroidization and inoculation；
2) it is 1330 ± 5 DEG C to adjust molten iron temperature, moulding by casting, casting crude product is obtained after the demoulding, first carries out casting crude productSurface treatment, is then heat-treated, produces steel alloy main body；Surface treatment includes impeller blasting, surface polishing, heat treatment toolBody is that the casting crude product after surface treatment first is heated into 410 DEG C, is incubated 1.2h, is then warming up to 820 DEG C again, is incubated 3.5h,Then oil quenching is carried out, it is 350 DEG C that casting crude product surface temperature is controlled after the completion of oil quenching, is sent into isothermal holding 2.5h in holding furnace,Air cooling after taking-up；
3) by Al-Mo-La-Cr powder fusion metallurgies pour into a mould sintered plate does source electrode, in 10kW furnace for double-layer metallic glow ion cementationIn steel alloy main body is entered row metal multicomponewnt cementation plating, obtain polynary plating steel alloy and carry out secondary heat treatment；Secondary heat treatment hasTo be first heated to 910 DEG C of insulation 0.6h, then heat up body 1160 DEG C of insulation 0.8h, water quenching is then carried out again, with 5 after the completion of water quenchingDEG C/min speed continues to be warming up to 520 DEG C, 20min is incubated, then takes out water cooling；
4) the multicomponewnt cementation alloy plating steel after heat treatment is polished, cleaned and dried, it is then organic in its surface sprayingSilicones composite coating, excavator high-strength wearable bucket tooth is produced after drying to be coated.
Embodiment 3：
A kind of excavator high-strength wearable bucket tooth, it is characterised in that including steel alloy main body, wear-resisting infiltration layer, corrosion-inhibiting coating,The steel alloy main body includes following percentage composition component：C 0.35%, Si 1.2%, Mn 0.7%, Mo 0.4%, Cr3.2%th, Ti 0.28%, Ni 0.15%, Y 0.2%, surplus are Fe and than evitable impurity, and the wear-resisting infiltration layer is Al-The more first infiltration layers of Mo-La-Cr, the corrosion-inhibiting coating are organic siliconresin composite coating.
Steel alloy main body also includes B 0.2%, Nb 0.15%；Each metallic element percentage composition is Mo in wear-resisting infiltration layer20%th, La 12%, Cr 22%, Al surpluses；Contain alumina whisker, kaolin and quartz in organic siliconresin composite coatingPowder, and three accounts for 6%, 15%, the 20% of corrosion-inhibiting coating gross mass respectively；
Excavator high-strength wearable bucket tooth, preparation technology are as follows：
1) take raw material to be placed in intermediate frequency furnace by constituent content proportioning to melt, sampling is quenched, obtains molten iron after spheroidization and inoculation；
2) it is 1330 ± 5 DEG C to adjust molten iron temperature, moulding by casting, casting crude product is obtained after the demoulding, first carries out casting crude productSurface treatment, is then heat-treated, produces steel alloy main body；Surface treatment includes impeller blasting, surface polishing, heat treatment toolBody is incubated 1h, is then warming up to 850 DEG C again, be incubated 3h, then for the casting crude product after surface treatment first is heated into 420 DEG COil quenching is carried out, it is 300 DEG C that casting crude product surface temperature is controlled after the completion of oil quenching, isothermal holding 4h in holding furnace is sent into, after taking-upAir cooling；
3) by Al-Mo-La-Cr powder fusion metallurgies pour into a mould sintered plate does source electrode, in 10kW furnace for double-layer metallic glow ion cementationIn steel alloy main body is entered row metal multicomponewnt cementation plating, obtain polynary plating steel alloy and carry out secondary heat treatment；Secondary heat treatment hasTo be first heated to 920 DEG C of insulation 0.5h, then heat up body 1180 DEG C of insulation 0.5h, water quenching is then carried out again, with 5 after the completion of water quenchingDEG C/min speed continues to be warming up to 550 DEG C, 20min is incubated, then takes out water cooling；
4) the multicomponewnt cementation alloy plating steel after heat treatment is polished, cleaned and dried, it is then organic in its surface sprayingSilicones composite coating, excavator high-strength wearable bucket tooth is produced after drying to be coated.
Embodiment 4：
A kind of excavator high-strength wearable bucket tooth, it is characterised in that including steel alloy main body, wear-resisting infiltration layer, corrosion-inhibiting coating,The steel alloy main body includes following percentage composition component：C 0.37%, Si 1%, Mn 0.65%, Mo 0.45%, Cr3%th, Ti 0.26%, Ni 0.1%, Y 0.2%, surplus are Fe and than evitable impurity, and the wear-resisting infiltration layer is Al-Mo-The more first infiltration layers of La-Cr, the corrosion-inhibiting coating are organic siliconresin composite coating.
Steel alloy main body also includes B 0.15%, Nb 0.15%；Each metallic element percentage composition is Mo in wear-resisting infiltration layer25%th, La 10%, Cr 18%, Al surpluses；Contain alumina whisker, kaolin and quartz in organic siliconresin composite coatingPowder, and three accounts for 5%, 20%, the 5% of corrosion-inhibiting coating gross mass respectively；
Excavator high-strength wearable bucket tooth, preparation technology are as follows：
1) take raw material to be placed in intermediate frequency furnace by constituent content proportioning to melt, sampling is quenched, obtains molten iron after spheroidization and inoculation；
2) it is 1330 ± 5 DEG C to adjust molten iron temperature, moulding by casting, casting crude product is obtained after the demoulding, first carries out casting crude productSurface treatment, is then heat-treated, produces steel alloy main body；Surface treatment includes impeller blasting, surface polishing, heat treatment toolBody is incubated 1.5h, is then warming up to 880 DEG C again, be incubated 2h, so for the casting crude product after surface treatment first is heated into 410 DEG CAfter carry out oil quenching, controlled after the completion of oil quenching casting crude product surface temperature be 320 DEG C, be sent into holding furnace in isothermal holding 3.5h, takeGo out rear air cooling；
3) by Al-Mo-La-Cr powder fusion metallurgies pour into a mould sintered plate does source electrode, in 10kW furnace for double-layer metallic glow ion cementationIn steel alloy main body is entered row metal multicomponewnt cementation plating, obtain polynary plating steel alloy and carry out secondary heat treatment；Secondary heat treatment hasTo be first heated to 910 DEG C of insulation 0.5h, then heat up body 1150 DEG C of insulation 0.9h, water quenching is then carried out again, with 5 after the completion of water quenchingDEG C/min speed continues to be warming up to 550 DEG C, 25min is incubated, then takes out water cooling；
4) the multicomponewnt cementation alloy plating steel after heat treatment is polished, cleaned and dried, it is then organic in its surface sprayingSilicones composite coating, excavator high-strength wearable bucket tooth is produced after drying to be coated.
Embodiment 5：
A kind of excavator high-strength wearable bucket tooth, it is characterised in that including steel alloy main body, wear-resisting infiltration layer, corrosion-inhibiting coating,The steel alloy main body includes following percentage composition component：C 0.36%, Si 1.1%, Mn 0.65%, Mo 0.3%, Cr3.3%th, Ti 0.25%, Ni 0.14%, Y 0.18%, surplus are Fe and than evitable impurity, and the wear-resisting infiltration layer is Al-The more first infiltration layers of Mo-La-Cr, the corrosion-inhibiting coating are organic siliconresin composite coating.
Steel alloy main body also includes B 0%, Nb 0.2%；In wear-resisting infiltration layer each metallic element percentage composition be Mo 22%,La 5%, Cr25%, Al surplus；Contain alumina whisker, kaolin and silica flour, and three in organic siliconresin composite coating7%, 15%, the 20% of corrosion-inhibiting coating gross mass is accounted for respectively；
Excavator high-strength wearable bucket tooth, preparation technology are as follows：
1) take raw material to be placed in intermediate frequency furnace by constituent content proportioning to melt, sampling is quenched, obtains molten iron after spheroidization and inoculation；
2) it is 1330 ± 5 DEG C to adjust molten iron temperature, moulding by casting, casting crude product is obtained after the demoulding, first carries out casting crude productSurface treatment, is then heat-treated, produces steel alloy main body；Surface treatment includes impeller blasting, surface polishing, heat treatment toolBody is that the casting crude product after surface treatment first is heated into 420 DEG C, is incubated 1.2h, is then warming up to 860 DEG C again, is incubated 2.5h,Then oil quenching is carried out, it is 350 DEG C that casting crude product surface temperature is controlled after the completion of oil quenching, is sent into isothermal holding 2h in holding furnace, takesGo out rear air cooling；
3) by Al-Mo-La-Cr powder fusion metallurgies pour into a mould sintered plate does source electrode, in 10kW furnace for double-layer metallic glow ion cementationIn steel alloy main body is entered row metal multicomponewnt cementation plating, obtain polynary plating steel alloy and carry out secondary heat treatment；Secondary heat treatment hasTo be first heated to 900 DEG C of insulation 1h, then heat up body 1160 DEG C of insulation 0.6h, water quenching is then carried out again, with 5 after the completion of water quenchingDEG C/min speed continues to be warming up to 500 DEG C, 25min is incubated, then takes out water cooling；
4) the multicomponewnt cementation alloy plating steel after heat treatment is polished, cleaned and dried, it is then organic in its surface sprayingSilicones composite coating, excavator high-strength wearable bucket tooth is produced after drying to be coated.
The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although with reference to the foregoing embodimentsThe present invention is described in detail, it will be understood by those within the art that：It still can be to foregoing each implementationTechnical scheme described in example is modified, or carries out equivalent substitution to which part technical characteristic；And these modification orReplace, the essence of appropriate technical solution is departed from the spirit and scope of various embodiments of the present invention technical scheme.