CN103331441B - Special in the cobalt based ceramic metal powdered alloy of press tool laser melting coating - Google Patents
Special in the cobalt based ceramic metal powdered alloy of press tool laser melting coating Download PDFInfo
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- CN103331441B CN103331441B CN201310241756.0A CN201310241756A CN103331441B CN 103331441 B CN103331441 B CN 103331441B CN 201310241756 A CN201310241756 A CN 201310241756A CN 103331441 B CN103331441 B CN 103331441B
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Abstract
The present invention discloses a kind of special in the cobalt based ceramic metal powdered alloy of press tool laser melting coating, by weight percentage, comprises 12-14% silicon carbide, 0.3-0.5% carbon, 4-6% Calcium Fluoride (Fluorspan), 4-6% silicon nitride, 1-3% boron, 22-27% chromium, 0.3-0.7% vanadium, 5-7% iron, 12-18% molybdenum, 1.0-1.4% manganese, surplus is cobalt. This cobalt based ceramic metal powdered alloy is special in the laser melting coating of press tool, improve press tool metal structure compactness, reduce the pore of cladding layer, crackle and shrinkage cavity defect, thus improve the hardness of press tool, intensity, wear resistance, erosion resistance and thermotolerance.
Description
Technical field
The present invention relates to a kind of powdered alloy, refer to a kind of special in the cobalt based ceramic metal powdered alloy of press tool laser melting coating especially.
Background technology
Laser has the feature of high brightness, high directivity, high monochromaticity, high coherency, and the field just got more and more now uses, and laser melting coating is exactly the one in process for treating surface. Generally, the principle of laser melting coating utilizes high energy laser beam to irradiate metal material surface exactly, substrate surface is melted rapidly, liquid metal forms the molten bath of a small-scale, fill in new powdered material simultaneously, in this molten bath, metallic substance originally mixes mutually with the powder being added, and forms one layer of new liquid-metal layer. After treating laser beam flying, liquid-metal layer cools rapidly and thus forms one layer of solid-state cladding layer in metallic surface. Press tool is the instrument making blank become the product having specified shape and size under external force. The material manufacturing press tool requires that the wear resistance having had, obdurability, repeated stress failure, special occasions need erosion resistance and thermotolerance. If so press tool entirety is all made by the material meeting above-mentioned mechanical property, so the cost of press tool is very high. If can provide a kind of special in the sintering metal powdered alloy of press tool laser melting coating, to meet press tool, there is good wear resistance, obdurability and repeated stress failure, so only need to carry out laser melting coating on the surface of press tool, improve the mechanical property contacting position with blank and can meet service requirements, so can reduce press tool cost greatly.
Summary of the invention
Technical problem to be solved by this invention is: provide a kind of special in the cobalt based ceramic metal powdered alloy of press tool laser melting coating, this cobalt based ceramic metal powdered alloy is special in the laser melting coating of press tool, improve press tool metal structure compactness, reduce the pore of cladding layer, crackle and shrinkage cavity defect, thus improve the hardness of press tool, intensity, wear resistance, erosion resistance and thermotolerance.
For solving the problems of the technologies described above, the technical scheme of the present invention is: a kind of special in the cobalt based ceramic metal powdered alloy of press tool laser melting coating, by weight percentage, comprise 12-14% silicon carbide, 0.3-0.5% carbon, 4-6% Calcium Fluoride (Fluorspan), 4-6% silicon nitride, 1-3% boron, 22-27% chromium, 0.3-0.7% vanadium, 5-7% iron, 12-18% molybdenum, 1.0-1.4% manganese, surplus is cobalt.
Wherein, the special cobalt based ceramic metal powdered alloy optimum ratio in press tool laser melting coating comprises 13% silicon carbide, 0.4% carbon, 5% Calcium Fluoride (Fluorspan), 5% silicon nitride, 2% boron, 25% chromium, 0.5% vanadium, 6% iron, 15% molybdenum, 1.2% manganese, and surplus is cobalt.
In cobalt based ceramic metal powdered alloy in the present invention, the effect of each composition is as follows:
Cobalt (Co): as cermet substrate, thorough melting during cladding, together forms laser molten pool with the press tool base material of molten state, is uniformly distributed after coagulation for other elements or compound and becomes cladding layer, to increase cladding layer hardness in molten bath.
Silicon carbide (SiC) particle: non-fusible in laser cladding process, cobalt based ceramic metal powdered alloy during press tool laser melting coating is evenly sprayed from the powder shower nozzle of laser head, silicon carbide is evenly distributed in molten bath, it is present in cladding layer as strengthening particulate, significantly enhances the hardness of cladding layer.
Carbon (C): belong to non-metallic element, carbon content is more high, hardness is more high, wear resisting property is more good, yield-point and tensile strength raise, but its toughness, plasticity, impact and corrosion resistance can reduce along with the increase of carbon content, while therefore the selection of C content guarantees that press tool meets wear resistance in this sintering metal powdered alloy, take into account toughness and erosion resistance as much as possible.
, for reducing internal stress when cladding layer solidifies, there is the defect such as thermal crack, shrinkage cavity and porosity after preventing from solidifying, it is to increase the compactness of metal inside tissue in Calcium Fluoride (Fluorspan) (CaF2): as adding material.
Silicon nitride (SiN4): exist as the 2nd kind of ceramic particle except silicon carbide (SiC), in cladding process non-fusible, but the thermal absorptivity of laser is big, heat dispersing can be accelerated, and as the mitigation of soft metallic element and ultrahigh hardness ceramic particle, strengthen creep resistance, oxidation-resistance, it is to increase erosion resistance.
Boron (B): there is grain-boundary strengthening effect, it is possible to improving the hardness of cladding layer, intensity, can improve the hardening capacity of steel, impels the normalizing state tissue of steel by perlite to bainite transformation.
Chromium (Cr): there is stronger solution strengthening ability, improve the intensity of cladding layer, the distortion ability after the quenching degree of steel and quenching can be increased, it is to increase hardening capacity, and make cladding layer have excellent erosion resistance, wear resistance, hardness, elasticity, coercive force, anti-brute force and thermotolerance.
Vanadium (V): have refined crystalline strengthening effect, can improve the hardening capacity of resistance to tempering and material, also can form carbide with carbon.
Iron (Fe): identical with the material of stamping die basal body, increases the affinity of liquid metal and matrix, it is to increase the intensity of cladding layer metallurgical binding, makes this sintering metal powdered alloy in fusion full and uniform with press tool.
Molybdenum (Mo): as a kind of rare earth element additive, promote grain refining, it is to increase the homogeneity of structure of cladding layer, thus improve the friction and wear behavior of cladding layer.
Manganese (Mn): the strong hardening capacity improving steel, ferrite and austenite all can be played bigger solution strengthening effect so that steel possess high intensity and hardness, when the too high meeting of manganese makes steel have obvious temper brittleness, manganese impels austenite to grow up, and makes steel to overheated more responsive.
After have employed technique scheme, the effect of the present invention is: this cobalt based ceramic metal powdered alloy is specifically designed to the laser melting coating of press tool, fully can merge with press tool base material, each composition is uniformly distributed in cladding layer, reduce the pore of cladding layer, crackle and shrinkage cavity defect, adopt ultrahigh hardness ceramic particle to improve the hardness of press tool, select some trace elements to improve press tool wear resistance in addition again, corrosion resistance, wear resistance, thermotolerance and intensity, extend press tool work-ing life, and all adopt high-performance material to make without the need to press tool is overall, reduce press tool cost.
Embodiment
Below by specific embodiment, the present invention is described in further detail.
Embodiment 1
By 120g silicon carbide, 3g carbon, 40g Calcium Fluoride (Fluorspan), 40g silicon nitride, 10g boron, 220g chromium, 3g vanadium, 50g iron, 120g molybdenum, 10g manganese, 384g cobalt mixes fully, obtains 100-200 object cobalt based ceramic metal powdered alloy.
Embodiment 2
By 140g silicon carbide, 5g carbon, 60g Calcium Fluoride (Fluorspan), 60g silicon nitride, 30g boron, 270g chromium, the vanadium of 7g, 70g iron, 180g molybdenum, 14g manganese, 164g cobalt mixes fully, obtains 100-200 object cobalt based ceramic metal powdered alloy.
Embodiment 3
By 130g silicon carbide, 4g carbon, 50g Calcium Fluoride (Fluorspan), 50g silicon nitride, 20g boron, 250g chromium, 5g vanadium, 60g iron, 150g molybdenum, 12g manganese, 269g cobalt mixes fully, obtains 100-200 object cobalt based ceramic metal powdered alloy.
The sintering metal powdered alloy mixed in this embodiment 3 is evenly sprayed by the powder injection hole of laser head, the powder feeding direction of sintering metal powdered alloy and laser beams coaxial, the optical maser wavelength of laser is 1.06um, and output rating is 4000W, travelling speed is 3m/min, and single track width is 2mm. The position carrying out laser melting coating required for press tool is generally the working-surfaces such as press tool shearing position, molding surface, die cavity. The press tool obtained through laser melting coating carries out mechanical detection and obtains following data: (distance in following table is taking the lowest surface of cladding layer as base plane, just more than base plane is, is negative below base plane)
Any technician, within the technical scope of present disclosure, is equal to, according to the technical scheme of the present invention and invention design, the technical scheme replaced or change and should be fallen within protection scope of the present invention.
Claims (2)
1. special in the cobalt based ceramic metal powdered alloy of press tool laser melting coating, by weight percentage, it is by 12-14% silicon carbide, 0.3-0.5% carbon, 4-6% Calcium Fluoride (Fluorspan), 4-6% silicon nitride, 1-3% boron, 22-27% chromium, 0.3-0.7% vanadium, 5-7% iron, 12-18% molybdenum, 1.0-1.4% manganese, surplus is cobalt composition.
2. special in the cobalt based ceramic metal powdered alloy of press tool laser melting coating as claimed in claim 1, it is characterised in that: by 13% silicon carbide, 0.4% carbon, 5% Calcium Fluoride (Fluorspan), 5% silicon nitride, 2% boron, 25% chromium, 0.5% vanadium, 6% iron, 15% molybdenum, 1.2% manganese, 26.9% cobalt composition.
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| CN201310241756.0A CN103331441B (en) | 2013-06-18 | 2013-06-18 | Special in the cobalt based ceramic metal powdered alloy of press tool laser melting coating |
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| CN103331441B true CN103331441B (en) | 2016-06-08 |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103611927B (en) * | 2013-11-20 | 2015-12-30 | 柳岸敏 | Be exclusively used in the cobalt-based cermet powder of continuous wave optical-fiber laser cladding |
| CN103600066A (en) * | 2013-11-20 | 2014-02-26 | 毛桂林 | Cobalt-base alloy powder special for continuous-wave fiber laser cladding |
| CN103602858B (en) * | 2013-11-20 | 2015-11-18 | 张翀昊 | Be exclusively used in the cobalt-based cermet powder of continous way optical-fiber laser cladding |
| CN103614721A (en) * | 2013-11-20 | 2014-03-05 | 刘晓东 | Special powdered alloy for cladding process of continuous wave optical fiber laser |
| CN103614720A (en) * | 2013-11-20 | 2014-03-05 | 范贺良 | Special cobalt-based metal ceramic powdered alloy for cladding process of continuous wave optical fiber laser |
| CN106868497A (en) * | 2015-12-14 | 2017-06-20 | 浙江巨化装备制造有限公司 | The surface reinforcing method and its device of a kind of end-sealing die |
| CN108103500A (en) * | 2017-12-22 | 2018-06-01 | 西安交通大学 | A kind of stretching prestressing force cermet die casting and preparation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1298944A (en) * | 1969-08-26 | 1972-12-06 | Int Nickel Ltd | Powder-metallurgical products and the production thereof |
| CN102650012A (en) * | 2012-05-05 | 2012-08-29 | 张家港市和昊激光科技有限公司 | Special cobalt-based metal ceramic alloy powder for optical fiber laser cladding |
| CN102990060A (en) * | 2012-12-19 | 2013-03-27 | 江苏新亚特钢锻造有限公司 | Silicide particle reinforced laser-clad high abrasion resistance nickel-base alloy powder and preparation method thereof |
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| JP2003201528A (en) * | 2001-10-26 | 2003-07-18 | Ngk Insulators Ltd | Heat sink material |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1298944A (en) * | 1969-08-26 | 1972-12-06 | Int Nickel Ltd | Powder-metallurgical products and the production thereof |
| CN102650012A (en) * | 2012-05-05 | 2012-08-29 | 张家港市和昊激光科技有限公司 | Special cobalt-based metal ceramic alloy powder for optical fiber laser cladding |
| CN102990060A (en) * | 2012-12-19 | 2013-03-27 | 江苏新亚特钢锻造有限公司 | Silicide particle reinforced laser-clad high abrasion resistance nickel-base alloy powder and preparation method thereof |
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Effective date of registration: 20160602 Address after: Wujin District of Jiangsu city in Changzhou province 213164 Chang Wu Road No. 801, Changzhou science and Technology City Tianhong building A block 8 Building Patentee after: Changzhou Tengen Industry Development Co., Ltd. Address before: 215636 Daxin village, Daxin Town, Suzhou, Jiangsu, Zhangjiagang Patentee before: Jiangsu Hehao Laser Technology Co., Ltd. |
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Address after: Wujin District of Jiangsu city in Changzhou province 213164 Chang Wu Road No. 801, Changzhou science and Technology City Tianhong building A block 8 Building Patentee after: Changzhou Tianzheng industrial development Limited by Share Ltd Address before: Wujin District of Jiangsu city in Changzhou province 213164 Chang Wu Road No. 801, Changzhou science and Technology City Tianhong building A block 8 Building Patentee before: Changzhou Tengen Industry Development Co., Ltd. |