CN105195729A - Ceramic alloy powder special for continuous optical fiber laser alloying - Google Patents
Ceramic alloy powder special for continuous optical fiber laser alloying Download PDFInfo
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- CN105195729A CN105195729A CN201510266306.6A CN201510266306A CN105195729A CN 105195729 A CN105195729 A CN 105195729A CN 201510266306 A CN201510266306 A CN 201510266306A CN 105195729 A CN105195729 A CN 105195729A
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Abstract
The invention provides ceramic alloy powder special for continuous optical fiber laser alloying, and belongs to ceramic alloy powder. The ceramic alloy powder is composed of alloy powder and a ceramic hard phase. The alloy powder comprises, by weight, 5-8% of calcium fluoride, 8-12% of boron, 3-5% of lanthanum oxide and 15-25% of silicon nitride. The ceramic hard phase is a mixture of tungsten carbide and titanium carbide. The weight of the tungsten carbide accounts for 3-6% of the total weight of the alloy powder and the ceramic hard phase. The weight of the titanium carbide accounts for 10-15% of the total weight of the alloy powder and the ceramic hard phase. According to the obtained ceramic alloy powder, the generated tissue is compact and uniform, and the ceramic alloy powder is of the submicron ceramic fine-crystalline structure and has the excellent friction and wear resistance. The dilution rate is controlled, bubbles are released, pores are reduced, no cracks or shrinkage cavities or other defects are generated, and the ceramic alloy powder has the excellent metallurgical performance such as the hard hardness.
Description
Technical field
The present invention relates to ceramal powder, particularly a kind of ceramal powder being exclusively used in continous way optical-fiber laser alloying.
Background technology
Wearing and tearing are one of main failure modes of engineering component three kinds, and wearing and tearing derive from friction, about have the energy resource consumption of half in the world in the friction overcoming machine components antithesis surface interaction.According to incompletely statistics, the loss that China causes because wearing and tearing every year is up to billions of unit, and the wear problem solving material is very important.Wearing and tearing, generally from material surface, therefore carry out modification to material surface, are the effective methods of loss that reduces wear to improve the performance such as hardness, wearability, corrosion resistance on its surface.Laser surface alloying technology is by being attached to substrate material surface what need the material of alloying direct or indirect, then under the irradiation of high energy laser beam, make substrate surface thin layer rapid melting, mixing together with alloying substances, melting zone forms the new surface alloying layer of certain thickness and chemical composition within the extremely short time.
Laser surface alloying is as a kind of novel Laser Surface Modification Technology, because it has that energy is concentrated, little, the tiny densification of alloying layer structures in heat affected area, improves its hardness and wearability, corrosion resistance, easily realizes the features such as automation, have wide market prospects.At present, although the laser alloying technology of steel surface starts to walk, prior art level is lower, in the selection, Laser Scanning Parameters control of ceramic hard phase, especially needs research further and improve.
Summary of the invention
Technical problem to be solved by this invention is: provide a kind of ceramal powder being exclusively used in continous way optical-fiber laser alloying matched with the characteristic of jointed fiber laser.
The object of the present invention is achieved like this: this ceramal powder, and by alloy powder and ceramic hard phase composition, alloy powder is made up of the component of following weight percentage: 5-8% calcirm-fluoride, 8-12% boron, 3-5% lanthana, 15-25% silicon nitride.
Described ceramic hard is the mixture of tungsten carbide and titanium carbide mutually, and the weight of described tungsten carbide is the 3-6% of alloy powder and ceramic hard phase gross weight, and the weight of described titanium carbide is the 10-15% of alloy powder and ceramic hard phase gross weight.
Beneficial effect, owing to have employed such scheme, ceramal powder is in continous way optical-fiber laser alloying, and ceramal powder, the dense structure of generation is even, has the wear Characteristics of sub-micron pottery aplitic texture and excellence.Be beneficial to control dilution rate, release bubble, reduces pore, the defect such as flawless, shrinkage cavity, and has the excellent metallography performances such as high rigidity.
Detailed description of the invention
Below by specific embodiment, the present invention is described in further detail:
This ceramal powder, by alloy powder and ceramic hard phase composition, alloy powder is made up of the component of following weight percentage: 5-8% calcirm-fluoride, 8-12% boron, 3-5% lanthana, 15-25% silicon nitride; Described ceramic hard is the mixture of tungsten carbide and titanium carbide mutually, and the weight of described tungsten carbide is the 3-6% of alloy powder and ceramic hard phase gross weight, and the weight of described titanium carbide is the 10-15% of alloy powder and ceramic hard phase gross weight.
In ceramal powder of the present invention, the effect of each composition is as follows respectively:
, for reducing internal stress when alloy-layer solidifies, after preventing from solidifying, there is the defect such as fire check, shrinkage cavity and porosity, improving the compactness of metal inside tissue in calcirm-fluoride (CaF2): as adding material.
Boron (B) element: play deoxidation voluntarily and slag making in alloy powder, preferentially borate can be formed with the oxygen element entering alloy-layer, be covered in alloyed layer, prevent liquid metal over oxidation, low-alloyed fusing point can also fall, improve the wettability of melt to parent metal, the mobility of alloy and surface tension produce favorable influence.
Lanthana (La2O3): improve the stability because of variations in temperature and life-span, the dense structure of crystal grain thinning, generation is even, is beneficial to release bubble, reduces pore.
Silicon nitride (SiN4): exist as the second ceramic particle except tungsten carbide (WC), non-fusible in alloying process, but it is large to the thermal absorptivity of laser, heat dispersing can be accelerated, and as the mitigation of soft metallic element and ultrahigh hardness ceramic particle, strengthen creep resistance, non-oxidizability, improve corrosion resistance.
Tungsten carbide (WC) is non-fusible in laser alloying process, is evenly distributed in molten bath, is present in alloy-layer, significantly enhances hardness and the wearability of alloy-layer as strengthening particulate.
Titanium carbide (TiC) is non-fusible in laser alloying process, as the distribution of strengthening particulate homogenous, is present in alloy-layer, significantly enhances hardness and the intensity of alloy-layer.
Embodiment 1: the proportioning for the percentage by weight of the ceramal powder of jointed fiber laser alloying is: 6% calcirm-fluoride, 9% boron, 3% lanthana, 20% silicon nitride, 3% tungsten carbide and 15% titanium carbide.
Embodiment 2: will be 5% calcirm-fluoride by weight percentage, 8% boron, 3% lanthana, 15% silicon nitride; 3% tungsten carbide, the ratio of 10% titanium carbide takes 500g sample, obtains 200-300 object ceramal powder after sample preparation.
Embodiment 3: will be 6% calcirm-fluoride by weight percentage, 9% boron, 4% lanthana, 20% silicon nitride; 5% tungsten carbide, the ratio of 13% titanium carbide takes 500g sample, obtains 200-300 object ceramal powder after sample preparation.
Embodiment 4: will be 8% calcirm-fluoride by weight percentage, 12% boron, 5% lanthana, 25% silicon nitride; 6% tungsten carbide, the ratio of 15% titanium carbide takes 500g sample, obtains 200-300 object ceramal powder after sample preparation.
The ceramal powder obtained is prepared by embodiment 4, in 2000W jointed fiber laser power, spot size 10mm
2, sweep speed 15mm/s, under the process conditions such as powder feeding rate 20g/min, be that Laser Alloying Treatment is carried out on Q450 ferrite ductile cast iron surface to base material, under room temperature, testing result is as shown in the table:
| Sample | Dilution rate (%) | Alloy-layer hardness (HV) | Wear-thickness (mm) |
| Embodiment 4 | 9-15％ | 1100 | 0.14 |
| Conventional ceramic alloy powder | 15-20％ | 860 | 0.26 |
Claims (4)
1. one kind is exclusively used in the ceramal powder of continous way optical-fiber laser alloying, it is characterized in that: this ceramal powder, by alloy powder and ceramic hard phase composition, alloy powder is made up of the component of following weight percentage: 5-8% calcirm-fluoride, 8-12% boron, 3-5% lanthana, 15-25% silicon nitride.
2. be exclusively used in the ceramal powder of continous way optical-fiber laser alloying according to claim 1 one kind, it is characterized in that: described ceramic hard is the mixture of tungsten carbide and titanium carbide mutually.
3. be exclusively used in the ceramal powder of continous way optical-fiber laser alloying according to claim 1 one kind, it is characterized in that: the weight of described tungsten carbide is the 3-6% of alloy powder and ceramic hard phase gross weight.
4. be exclusively used in the ceramal powder of continous way optical-fiber laser alloying according to claim 1 one kind, it is characterized in that: the weight of described titanium carbide is the 10-15% of alloy powder and ceramic hard phase gross weight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510266306.6A CN105195729A (en) | 2015-05-22 | 2015-05-22 | Ceramic alloy powder special for continuous optical fiber laser alloying |
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| CN201510266306.6A CN105195729A (en) | 2015-05-22 | 2015-05-22 | Ceramic alloy powder special for continuous optical fiber laser alloying |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1965423A2 (en) * | 2007-02-28 | 2008-09-03 | Dowa Metaltech Co., Ltd. | Metal/ceramic bonding substrate and brazing filler metal for use therein |
| CN103600067A (en) * | 2013-11-20 | 2014-02-26 | 樊宇 | Cobalt-base metal alloy powder special for continuous fiber laser cladding |
| 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 |
| CN104399968A (en) * | 2014-11-10 | 2015-03-11 | 中国矿业大学 | Cobalt-base metal alloy powder for continuous optical fiber laser surface alloying |
| CN105671410A (en) * | 2014-11-20 | 2016-06-15 | 中国矿业大学 | Ceramic alloy powder special for continuous fiber laser alloying |
-
2015
- 2015-05-22 CN CN201510266306.6A patent/CN105195729A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1965423A2 (en) * | 2007-02-28 | 2008-09-03 | Dowa Metaltech Co., Ltd. | Metal/ceramic bonding substrate and brazing filler metal for use therein |
| CN103600067A (en) * | 2013-11-20 | 2014-02-26 | 樊宇 | Cobalt-base metal alloy powder special for continuous fiber laser cladding |
| 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 |
| CN104399968A (en) * | 2014-11-10 | 2015-03-11 | 中国矿业大学 | Cobalt-base metal alloy powder for continuous optical fiber laser surface alloying |
| CN105671410A (en) * | 2014-11-20 | 2016-06-15 | 中国矿业大学 | Ceramic alloy powder special for continuous fiber laser alloying |
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