CN114908272B - Nodular cast iron laser cladding powder - Google Patents
Nodular cast iron laser cladding powder Download PDFInfo
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- CN114908272B CN114908272B CN202210646754.9A CN202210646754A CN114908272B CN 114908272 B CN114908272 B CN 114908272B CN 202210646754 A CN202210646754 A CN 202210646754A CN 114908272 B CN114908272 B CN 114908272B
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- cast iron
- laser cladding
- cladding powder
- nodular cast
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C19/00—Alloys based on nickel or cobalt
- C22C19/07—Alloys based on nickel or cobalt based on cobalt
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C24/00—Coating starting from inorganic powder
- C23C24/08—Coating starting from inorganic powder by application of heat or pressure and heat
- C23C24/10—Coating starting from inorganic powder by application of heat or pressure and heat with intermediate formation of a liquid phase in the layer
- C23C24/103—Coating with metallic material, i.e. metals or metal alloys, optionally comprising hard particles, e.g. oxides, carbides or nitrides
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Abstract
The invention discloses nodular cast iron laser cladding powder, which comprises 1.3-1.6% of C, 1.0-1.8% of Ni1.1-2.6% of Si, 12.5-13.6% of Cr12, 6.2-7.8% of Fe6, 3.2-3.6% of B, 0.03-0.06% of Nb0.03%, ceO 2 0.04‑0.06％、La 2 O 3 0.01-0.03 percent of cobalt-based alloy and the balance of Co, the formula of the cobalt-based alloy is improved in the scheme, the components such as niobium, cerium oxide, lanthanum oxide and the like are increased in a micro-quantitative mode, the distribution ratio of the rest components is optimized, the cost is reduced, and the wear resistance of the cladding layer is greatly improved.
Description
Technical Field
The invention relates to the technical field of cladding, in particular to nodular cast iron laser cladding powder.
Background
The nodular cast iron has excellent comprehensive mechanical properties such as higher strength and toughness, and the graphite spheres have a lubricating effect, so that the nodular cast iron can be frequently used in occasions with higher requirements on service performance instead of steel, but the nodular cast iron is frequently failed due to abrasion of the surface in a harsh service environment, and the nodular cast iron is mainly repaired by adopting methods such as thermal spraying, surfacing and the like in industrial practice at present so as to prolong the service life of the nodular cast iron. The thermal spraying coating has air holes and microcracks, is mechanically combined with the base material and is easy to peel off in the using process; the overlay welding has high heat input, so that the dilution rate of the coating is high, and the base material is easy to deform and crack. The coating prepared by the laser cladding technology has the advantages of fine and compact structure, high metallurgical bonding strength with the base material, small heat affected zone and thermal deformation of the base material and the like, and has wide application prospect in the field of surface strengthening and repairing of key parts.
At present, the powder applied to cladding on a ductile cast iron workpiece comprises iron base, cobalt base and the like, wherein the cobalt base has better performance and is widely applied, and the hardness of a common cobalt-base alloy cladding layer is generally more than 2 times of that of a QT600-3 brand matrix. With the development of research, some enterprises aim to further improve the wear resistance of the wear-resistant alloy, for example, when rare earth elements are added, although the hardness of the wear-resistant alloy is improved, the addition amount of the rare earth elements is larger, so that the cost is increased, and improvement is needed.
Disclosure of Invention
In order to solve at least one technical defect, the invention provides the following technical scheme:
the application document discloses nodular cast iron laser cladding powder which comprises 1.3-1.6% of C, 1.0-1.8% of Ni2.1-2.6% of Si, 12.5-13.6% of Cr12, 6.2-7.8% of Fe6, 3.2-3.6% of B, 0.03-0.06% of Nb0.03-0.06% of CeO 2 0.04-0.06％、La 2 O 3 0.01-0.03% and the balance of Co.
According to the scheme, the formula of the cobalt-based alloy is improved, the components such as niobium, cerium oxide and lanthanum oxide are increased in a micro-quantitative manner, the proportion of the rest components is optimized, the cost is reduced, and the wear resistance of the cladding layer is greatly improved.
Further, 1.3 to 1.4 percent of C, 1.5 to 1.6 percent of Ni1.3 to 2.35 percent of Si, 13 to 13.2 percent of Cr, 7.2 to 7.4 percent of Fe7, 3.2 to 3.3 percent of B, 0.04 to 0.045 percent of Nb0, and CeO 2 0.05-0.052％、La 2 O 3 0.01-0.02% and the balance of Co. Under the component proportion, the performance of the cladding layer is further improved.
Further, the particle size of the powder particles is 45-90 μm.
Further, the laser cladding parameters of the cladding powder are as follows: the output power is 2.2-2.4KW, the light spot is 2.5-3.5mm, the scanning speed is 800-950mm/min, and the laser beam large area scanning overlap ratio is 55%. And the laser cladding parameters are optimized in a targeted manner, and the performance of the cladding layer is improved again.
Compared with the prior art, the invention has the following beneficial effects:
1. the invention improves the formula of the cobalt-based alloy and greatly improves the wear resistance of the cladding layer by using trace rare earth elements.
Detailed Description
The present invention will be further described with reference to the following specific examples.
In the following examples and comparative examples, the matrix is made of nodular cast iron QT600-3, the size is 120mm in diameter, the thickness is 15mm, and the thickness of the cladding layer is 3mm. The particle size of the powder is 45-60 μm.
The weight percentages of the cladding powder components of the following examples are shown in Table 1 below
TABLE 1
In the above examples and comparative examples, the matrix was pre-treated before the cladding operation, in which an angle grinder removed the oxide scale on the surface of the nodular cast iron workpiece, cleaned with acetone, and dried with a blower. The components in the table are mixed uniformly in a ball mill in proportion.
During cladding, the powder is coated on the surface of a workpiece in a preset mode, preheated to 240 ℃, and then laser cladding is carried out.
The cladding parameters of the embodiment are as follows: the output power is 2.3KW, the light spot is 3mm, the scanning speed is 900mm/min, and the laser beam large-area scanning overlapping rate is 55%. The cladding thickness is 3mm.
Cladding parameters of the comparative examples: the output power is 2.3KW, the light spot is 3mm, the scanning speed is 700mm/min, and the laser beam large-area scanning overlapping rate is 30%. The cladding thickness is 3mm.
The workpiece prepared as above was tested for properties as shown in the following table:
TABLE 2
| Hardness (HV) | |
| Example 1 | 862 |
| Example 2 | 853 |
| Example 3 | 849 |
| Example 4 | 976 |
| Example 5 | 982 |
| Example 6 | 986 |
| Comparative example 1 | 649 |
| Comparative example 2 | 688 |
It can be seen that the hardness of the cladding layer in the scheme is improved by about four times of QT600-3, and the hardness value of the cladding layer deviated from the scheme greatly falls.
The structural morphology of the cladding layer is analyzed and found through a scanning electron microscope: in the embodiment, the structure of the cladding layer is obviously refined, the uniformity is improved, the spacing of secondary dendrites is small, and the grains are refined. Cr, ni, fe and other elements promote the generation of hard phase, and rare earth elements and the like are dispersed and distributed in the dendrite trunk, so that the hardness is improved under the matching condition.
The cladding layer structure is found to be composed of gamma-Co phase and Cr through X-ray diffraction spectrum 7 C 3 Phase, ceO 2 /La 2 O 3 The phase and the NbC are equal in composition, are metastable phases fused with various alloy elements, and reflect to the macroscopic performance of a cladding layer, namely the hardness is greatly improved.
The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above-mentioned embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.
Claims (4)
1. The ductile cast iron laser cladding powder is characterized by comprising 1.3-1.6% of C, 1.0-1.8% of Ni1, 1-2.6% of Si, 12.5-13.6% of Cr12, 6.2-7.8% of Fe6, 3.2-3.6% of B, 0.03-0.06% of Nb0, ceO 2 0.04-0.06％、La 2 O 3 0.01-0.03% and the balance of Co.
2. The method of claim 1The laser cladding powder of ductile cast iron is characterized in that: 1.3 to 1.4 percent of C, 1.5 to 1.6 percent of Nis, 2.3 to 2.35 percent of Si, 13 to 13.2 percent of Cr, 7.2 to 7.4 percent of Fes, 3.2 to 3.3 percent of B, 0.04 to 0.045 percent of Nbs, ceO 2 0.05-0.052％、La 2 O 3 0.01-0.02% and the rest is Co.
3. The laser cladding powder of ductile iron according to claim 1, wherein: the particle size of the powder particles is 45-90 μm.
4. The laser cladding powder of ductile iron according to claim 1, wherein: the laser cladding parameters of the cladding powder are as follows: the output power is 2.2-2.4KW, the light spot is 2.5-3.5mm, the scanning speed is 800-950mm/min, and the laser beam large area scanning overlap ratio is 55%.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210646754.9A CN114908272B (en) | 2022-06-08 | 2022-06-08 | Nodular cast iron laser cladding powder |
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| CN202210646754.9A CN114908272B (en) | 2022-06-08 | 2022-06-08 | Nodular cast iron laser cladding powder |
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| CN114908272B true CN114908272B (en) | 2022-11-04 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4245008A (en) * | 1978-10-30 | 1981-01-13 | International Business Machines Corporation | Corrosion resistant magnetic recording media |
| CN102168210A (en) * | 2011-04-07 | 2011-08-31 | 杭州博华激光技术有限公司 | Laser cladding technological method and alloy material for laser cladding |
| CN102560478A (en) * | 2012-02-29 | 2012-07-11 | 中联重科股份有限公司 | Laser cladding method |
| CN106756255A (en) * | 2016-11-30 | 2017-05-31 | 沈阳大陆激光成套设备有限公司 | A kind of wear-resistant coating that express elevator traction sheave is manufactured for laser |
| CN109183029A (en) * | 2018-11-16 | 2019-01-11 | 佛山市南海区科琎精密机械有限公司 | A kind of laser melting and coating process |
| CN113416952A (en) * | 2021-06-22 | 2021-09-21 | 马鞍山市申马机械制造有限公司 | TiC reinforced metal matrix composite alloy powder for laser cladding of nodular iron castings and preparation method thereof |
-
2022
- 2022-06-08 CN CN202210646754.9A patent/CN114908272B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4245008A (en) * | 1978-10-30 | 1981-01-13 | International Business Machines Corporation | Corrosion resistant magnetic recording media |
| CN102168210A (en) * | 2011-04-07 | 2011-08-31 | 杭州博华激光技术有限公司 | Laser cladding technological method and alloy material for laser cladding |
| CN102560478A (en) * | 2012-02-29 | 2012-07-11 | 中联重科股份有限公司 | Laser cladding method |
| CN106756255A (en) * | 2016-11-30 | 2017-05-31 | 沈阳大陆激光成套设备有限公司 | A kind of wear-resistant coating that express elevator traction sheave is manufactured for laser |
| CN109183029A (en) * | 2018-11-16 | 2019-01-11 | 佛山市南海区科琎精密机械有限公司 | A kind of laser melting and coating process |
| CN113416952A (en) * | 2021-06-22 | 2021-09-21 | 马鞍山市申马机械制造有限公司 | TiC reinforced metal matrix composite alloy powder for laser cladding of nodular iron castings and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 高温合金GH2132表面堆焊钴基合金工艺研究;陈道凤等;《发电设备》;20180315(第02期);全文 * |
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