CN105316616A - Method for preparing abrasion-resistant coating on surface of bucket tooth - Google Patents
Method for preparing abrasion-resistant coating on surface of bucket tooth Download PDFInfo
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- CN105316616A CN105316616A CN201510726897.0A CN201510726897A CN105316616A CN 105316616 A CN105316616 A CN 105316616A CN 201510726897 A CN201510726897 A CN 201510726897A CN 105316616 A CN105316616 A CN 105316616A
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Abstract
The invention discloses a method for preparing an abrasion-resistant coating on the surface of a bucket tooth. The method includes the following steps of coating powder preparing, oil and rust removing and coating spraying. Coating powder is formed by mixing the following raw materials which include, by weight, 10-17% of Cr, 5-12% of Mo, 10-13% of Ni, 2-7% of C, 2-2.5% of B, 3-5% of Si, 3-5% of W, 2-2.5% of V and the balance iron. The obtained coating is thin, compact in structure, high in bonding strength to the surface of the bucket tooth and good in forming property, the surface of the coating is smooth, the sprayed layer thickness is easy to control, and the efficiency is high. W, Si, C and the like among constituents in the coating generate hard phases of WC, SiC and the like with good abrasion resistance and high hardness during spraying, the abrasion resistance of the coating is improved, and the tenacity of the coating is enhanced through the transition metal V. In addition, bonding of the coating to a substrate is further facilitated by the aid of Fe which is a main constituent in the spraying materials, and the good heat conducting property can be guaranteed.
Description
Technical field
The present invention relates to high-abrasive material technical field, be specifically related to a kind of preparation method of bucket tooth surface wearable coating.
Background technology
Bucket tooth is the vitals of excavator, it directly contacts with the material such as ore, sand, rock in the course of the work and both bears stronger impact, bear Moment again, bucket tooth tip receives stronger impact abrasive wear, make the various cutting ditch dug with a plow of the normal appearance in its surface, distortion, cause surface abrasion or come off.Therefore desirable excavator bucket teeth material surface should have high hardness and wear resistance, and matrix has high intensity, high toughness, and this is that single material is difficult to reach simultaneously.The large multiplex high mangaenese steel manufacture of current domestic bucket tooth, also useful steel alloy manufacture.General bucket tooth is low mainly due to surface hardness, causes wearing no resistance and wearing and tearing, and part is because center toughness is not enough, when being subject to certain impact, brittle failure occurs, therefore, bucket tooth needs frequent replacing, the result of frequent replacing not only causes the huge waste of material, and have impact on production schedule.
At present, the method preparing wear-resistant coating at matrix surface has a lot, Chinese Patent Application No. 201310310128.3 describes a kind of plasma cladding gradient wear resistant layer and preparation technology, cladding layer and outer cladding layer powdered alloy in adopting, the wear-resisting cladding layer of gradient is prepared at matrix surface, achieve metallographic structure from outer clad layer surface to the graded of welded bonds, gradient cladding layer has the incomparable advantage of single cladding layer, that optimum performance between ceramic melt coating with metallurgical matrix is mated, its hardness is from outer cladding layer to the stepped slow decline of the distribution curve of matrix heat affected zone, impact resistance improves greatly.But this technology complicated process of preparation, not easily implements and large-scale application.
Summary of the invention
For the deficiencies in the prior art, the invention provides a kind of preparation method of bucket tooth surface wearable coating, the method can improve wear resisting property and the toughness of bucket tooth effectively, improves the acceptable life of bucket tooth.
For realizing above object, the present invention is achieved by the following technical programs:
A preparation method for bucket tooth surface wearable coating, comprises the following steps:
1). prepare coated powder: adopt aeroponics to prepare amorphous powdered alloy, described powder is become by the mixed raw material of following weight part: Cr10-17%, Mo5-12%, Ni10-13%, C2-7%, B2-2.5%, Si3-5%, W3-5%, V2-2.5%, iron surplus;
2). degreasing and rust removal: bucket tooth surface to be purified, alligatoring pretreatment technology;
3). spray coating: adopt hypersonic flame spraying step 1) the middle coated powder prepared is in pretreated bucket tooth surface, each coat-thickness 50 μm-100 μm, again carries out covering spraying, sprays 3-4 time after cooling;
4). coating is repaired: adopt the bucket tooth heating surface of pressurized gas to wear-resistant coating to carry out deashing process, keep the clean drying of coatingsurface, then carry out sandblasting to coatingsurface.
Preferably, described step 2) in purifying step be adopt propyl alcohol or gasoline cleaning bucket tooth surface dirt.
Preferably, described step 2) in roughening step be sandblasting roughening treatment, selecting granularity to be 10-15 object quartz sand, is carry out sandblasting alligatoring under the condition of 0.7Mpa at pressure.
Preferably, described step 3) moderate supersonic speed flame spraying process parameter is: oxygen flow 500-600L/min, kerosene oil flow 0.5-0.6L/min, powder feed rate 20-30g/min, spray distance 200-300mm, base material temperature controls below 250 DEG C.
Preferably, described step 4) in sandblasting first adopt the weak binding particle on the diamond grains of sand of diameter 0.5-1mm sandblasting decoating surface under 0.1-0.3MPa, the diamond grains of sand sandblasting under 0.3-0.6MPa re-using 0.1-0.3mm makes its coating fine and close.
Beneficial effect: the coating that the present invention obtains is thinner, compact structure, with bucket tooth surface bonding strength is high and coatingsurface is smooth, plasticity is good, and jetting thickness is easy to control, and efficiency is high; W in coated material composition, Si, C etc. generate the WC that wear resisting property is good, hardness is high in the process of spraying, the hard phases such as SiC, improve the wear resistance of coated material, transition metal V then enhances the toughness of coated material, and the existence of spray material main component Fe is more conducive to the combination between coating and matrix, can ensure good heat conductivility; Process line of the present invention is succinct, and cost is lower, and it is convenient to implement, and improves the acceptable life of bucket tooth, can realize industrialized being applicable.
Embodiment
For making the object of the embodiment of the present invention, technical scheme and advantage clearly, below in conjunction with the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, 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.
Embodiment 1:
A preparation method for bucket tooth surface wearable coating, comprises the following steps:
1). prepare coated powder: adopt aeroponics to prepare amorphous powdered alloy, described powder is become by the mixed raw material of following weight part: Cr10%, Mo5%, Ni13%, C7%, B2.5%, Si5%, W5%, V2.5%, iron surplus;
2). degreasing and rust removal: bucket tooth surface to be purified, alligatoring pretreatment technology;
3). spray coating: adopt hypersonic flame spraying step 1) the middle coated powder prepared is in pretreated bucket tooth surface, each coat-thickness 50 μm-100 μm, again carries out covering spraying, sprays 3-4 time after cooling;
4). coating is repaired: adopt the bucket tooth heating surface of pressurized gas to wear-resistant coating to carry out deashing process, keep the clean drying of coatingsurface, then carry out sandblasting to coatingsurface.
Described step 2) in purifying step be adopt propyl alcohol or gasoline cleaning bucket tooth surface dirt.
Described step 2) in roughening step be sandblasting roughening treatment, selecting granularity to be 10-15 object quartz sand, is carry out sandblasting alligatoring under the condition of 0.7Mpa at pressure.
Described step 3) moderate supersonic speed flame spraying process parameter is: oxygen flow 500-600L/min, kerosene oil flow 0.5-0.6L/min, powder feed rate 20-30g/min, spray distance 200-300mm, base material temperature controls below 250 DEG C.
Described step 4) in sandblasting first adopt the weak binding particle on the diamond grains of sand of diameter 0.5-1mm sandblasting decoating surface under 0.1-0.3MPa, the diamond grains of sand sandblasting under 0.3-0.6MPa re-using 0.1-0.3mm makes its coating fine and close.
Embodiment 2:
A preparation method for bucket tooth surface wearable coating, comprises the following steps:
1). prepare coated powder: adopt aeroponics to prepare amorphous powdered alloy, described powder is become by the mixed raw material of following weight part: Cr17%, Mo12%, Ni10%, C2%, B2%, Si3%, W3%, V2%, iron surplus;
2). degreasing and rust removal: bucket tooth surface to be purified, alligatoring pretreatment technology;
3). spray coating: adopt hypersonic flame spraying step 1) the middle coated powder prepared is in pretreated bucket tooth surface, each coat-thickness 50 μm-100 μm, again carries out covering spraying, sprays 3-4 time after cooling;
4). coating is repaired: adopt the bucket tooth heating surface of pressurized gas to wear-resistant coating to carry out deashing process, keep the clean drying of coatingsurface, then carry out sandblasting to coatingsurface.
Described step 2) in purifying step be adopt propyl alcohol or gasoline cleaning bucket tooth surface dirt.
Described step 2) in roughening step be sandblasting roughening treatment, selecting granularity to be 10-15 object quartz sand, is carry out sandblasting alligatoring under the condition of 0.7Mpa at pressure.
Described step 3) moderate supersonic speed flame spraying process parameter is: oxygen flow 500-600L/min, kerosene oil flow 0.5-0.6L/min, powder feed rate 20-30g/min, spray distance 200-300mm, base material temperature controls below 250 DEG C.
Described step 4) in sandblasting first adopt the weak binding particle on the diamond grains of sand of diameter 0.5-1mm sandblasting decoating surface under 0.1-0.3MPa, the diamond grains of sand sandblasting under 0.3-0.6MPa re-using 0.1-0.3mm makes its coating fine and close.
Embodiment 3:
A preparation method for bucket tooth surface wearable coating, comprises the following steps:
1). prepare coated powder: adopt aeroponics to prepare amorphous powdered alloy, described powder is become by the mixed raw material of following weight part: Cr15%, Mo8%, Ni10%, C6%, B2.5%, Si3%, W4%, V2%, iron surplus;
2). degreasing and rust removal: bucket tooth surface to be purified, alligatoring pretreatment technology;
3). spray coating: adopt hypersonic flame spraying step 1) the middle coated powder prepared is in pretreated bucket tooth surface, each coat-thickness 50 μm-100 μm, again carries out covering spraying, sprays 3-4 time after cooling;
4). coating is repaired: adopt the bucket tooth heating surface of pressurized gas to wear-resistant coating to carry out deashing process, keep the clean drying of coatingsurface, then carry out sandblasting to coatingsurface.
Described step 2) in purifying step be adopt propyl alcohol or gasoline cleaning bucket tooth surface dirt.
Described step 2) in roughening step be sandblasting roughening treatment, selecting granularity to be 10-15 object quartz sand, is carry out sandblasting alligatoring under the condition of 0.7Mpa at pressure.
Described step 3) moderate supersonic speed flame spraying process parameter is: oxygen flow 500-600L/min, kerosene oil flow 0.5-0.6L/min, powder feed rate 20-30g/min, spray distance 200-300mm, base material temperature controls below 250 DEG C.
Described step 4) in sandblasting first adopt the weak binding particle on the diamond grains of sand of diameter 0.5-1mm sandblasting decoating surface under 0.1-0.3MPa, the diamond grains of sand sandblasting under 0.3-0.6MPa re-using 0.1-0.3mm makes its coating fine and close.
To sum up, the embodiment of the present invention has following beneficial effect: this coating is combined closely with bucket tooth matrix, there is very high hardness, certain toughness and very fine and close structure, wear-resisting and corrosion resistance and good, and process line is succinct, cost is lower, and it is convenient to implement, improve the acceptable life of bucket tooth, industrialized being applicable can be realized.
It should be noted that, in this article, the such as relational terms of first and second grades and so on is only used for an entity or operation to separate with another entity or operational zone, and not necessarily requires or imply the relation that there is any this reality between these entities or operation or sequentially.And, term " comprises ", " comprising " or its any other variant are intended to contain comprising of nonexcludability, thus make to comprise the process of a series of key element, method, article or equipment and not only comprise those key elements, but also comprise other key elements clearly do not listed, or also comprise by the intrinsic key element of this process, method, article or equipment.When not more restrictions, the key element limited by statement " comprising ... ", and be not precluded within process, method, article or the equipment comprising described key element and also there is other identical element.
Above embodiment only in order to technical scheme of the present invention to be described, is 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 (5)
1. a preparation method for bucket tooth surface wearable coating, is characterized in that, comprises the following steps:
1). prepare coated powder: adopt aeroponics to prepare amorphous powdered alloy, described powder is become by the mixed raw material of following weight part: Cr10-17%, Mo5-12%, Ni10-13%, C2-7%, B2-2.5%, Si3-5%, W3-5%, V2-2.5%, iron surplus;
2). degreasing and rust removal: bucket tooth surface to be purified, alligatoring pretreatment technology;
3). spray coating: adopt hypersonic flame spraying step 1) the middle coated powder prepared is in pretreated bucket tooth surface, each coat-thickness 50 μm-100 μm, again carries out covering spraying, sprays 3-4 time after cooling;
4). spray coating: adopt the bucket tooth heating surface of pressurized gas to wear-resistant coating to carry out deashing process, keep the clean drying of coatingsurface, then sandblasting is carried out to coatingsurface.
2. the preparation method of bucket tooth surface wearable coating as claimed in claim 1, is characterized in that, described step 2) in purifying step be the dirt adopting propyl alcohol or gasoline cleaning bucket tooth surface.
3. the preparation method of bucket tooth surface wearable coating as claimed in claim 1, is characterized in that, described step 2) in roughening step be sandblasting roughening treatment, selecting granularity to be 10-15 object quartz sand, is carry out sandblasting alligatoring under the condition of 0.7Mpa at pressure.
4. the preparation method of bucket tooth surface wearable coating as claimed in claim 1, it is characterized in that, described step 3) moderate supersonic speed flame spraying process parameter is: oxygen flow 500-600L/min, kerosene oil flow 0.5-0.6L/min, powder feed rate 20-30g/min, spray distance 200-300mm, base material temperature controls below 250 DEG C.
5. the preparation method of bucket tooth surface wearable coating as claimed in claim 1, it is characterized in that, described step 4) in sandblasting first adopt the weak binding particle on the diamond grains of sand of diameter 0.5-1mm sandblasting decoating surface under 0.1-0.3MPa, the diamond grains of sand sandblasting under 0.3-0.6MPa re-using 0.1-0.3mm makes its coating fine and close.
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| CN201510726897.0A CN105316616A (en) | 2015-10-28 | 2015-10-28 | Method for preparing abrasion-resistant coating on surface of bucket tooth |
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| CN201510726897.0A CN105316616A (en) | 2015-10-28 | 2015-10-28 | Method for preparing abrasion-resistant coating on surface of bucket tooth |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106435385A (en) * | 2016-10-17 | 2017-02-22 | 武汉春禾科技有限公司 | High-temperature-resistant wear-resistant pulley coating |
| CN113481458A (en) * | 2021-07-08 | 2021-10-08 | 中国人民解放军陆军装甲兵学院 | Wear-resistant particle wear-resistant powder core wire material and preparation method thereof, wear-resistant particle wear-resistant coating and preparation method thereof |
| US20230119904A1 (en) * | 2021-10-15 | 2023-04-20 | Chung Yo Materials Co., Ltd. | Iron-based metallic glass alloy powder and use thereof in coating |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106435385A (en) * | 2016-10-17 | 2017-02-22 | 武汉春禾科技有限公司 | High-temperature-resistant wear-resistant pulley coating |
| CN106435385B (en) * | 2016-10-17 | 2017-11-28 | 武汉春禾科技有限公司 | High-temperature-resistant wear-resistant pulley coating |
| CN113481458A (en) * | 2021-07-08 | 2021-10-08 | 中国人民解放军陆军装甲兵学院 | Wear-resistant particle wear-resistant powder core wire material and preparation method thereof, wear-resistant particle wear-resistant coating and preparation method thereof |
| US20230119904A1 (en) * | 2021-10-15 | 2023-04-20 | Chung Yo Materials Co., Ltd. | Iron-based metallic glass alloy powder and use thereof in coating |
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Application publication date: 20160210 |