CN101643824B - Technology method for pulse laser etching cobalt melting and fusing enhancing hard alloy - Google Patents
Technology method for pulse laser etching cobalt melting and fusing enhancing hard alloy Download PDFInfo
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- CN101643824B CN101643824B CN2009100920309A CN200910092030A CN101643824B CN 101643824 B CN101643824 B CN 101643824B CN 2009100920309 A CN2009100920309 A CN 2009100920309A CN 200910092030 A CN200910092030 A CN 200910092030A CN 101643824 B CN101643824 B CN 101643824B
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Abstract
A technology method for pulse laser etching cobalt melting and fusing enhancing hard alloy relates to the laser surface processing technique of a hard alloy cutter and belongs to the technical field of the laser processing. The surface enhanced technology which is based on guaranteeing the toughness of the hard alloy appears in the practical production; generally coating is less than 10mu m; the bonding strength between the coating and the matrix of the hard alloy is lower; therefore, the service life of the hard alloy can not be substantially increased. The technology method carries out laser etching cobalt melting and fusing treatment on the external surface of the hard alloy (the mass percent of the cobalt is 10-30%); the wave length of the pulse laser is 248nm-1060nm; the power density ranges from 1.0*10<6>-9.9*10<7>W/cm<2>; the pulse width is 10 picosecond (ps)-90 nanosecond (ns); the numbers of the pulse is 10-500; and the pulse frequency is 1-20Hz. The thickness of the laser melting and fusing layer is 20-60mu m; the cobalt content in the melting and fusing layer is 3-9%; binder of Co, Ni, Cr and the like and matrix materials are of fast freezing tissues; and the hard alloycan be a cutter or a saw bit and used for processing materials such as metal, wood, etc.
Description
Technical field
The present invention relates to the laser surface treating technology of inserted tool, belong to technical field of laser processing.
Background technology
Wimet belongs to superhard material, is widely used in industries such as mechanical workout, coal mining, mine, wood working, iron and steel, metallurgy.Wimet generally is to make body material with WC, TiC, TaC, NbC etc., is that matrix material is made with cobalt or nickel, has high rigidity, high strength, wear-resistant and fatigue strength and high temperature oxidation corrosion resistance performance preferably.Carboloy has good heat-conductive characteristic, hot hardness, heat-resistant anti-fatigue performance, wear resisting property etc., and price is relatively low, and therefore the Wimet based on wolfram varbide has obtained widespread use.The Wimet material of producing mostly is the WC-Co/WC-Co-Ni-Cr series hard metal both at home and abroad, wherein Co or the Co-Ni-Cr content range as binding agent is 10%～30%, and its production technique is divided into according to the sintering type colds pressing-sintering, hot pressing and hot isostatic pressing etc.The Wimet that conventional powder metallurgy mode is made has certain porosity, and wolfram varbide content is high more, and its hardness is high more, but reduction trend can appear in toughness and bending strength.Therefore some have appearred at the surface intensified techniques that guarantee on the Wimet toughness basis, the physical vapor deposition superhard coating (TiN, TiAlN, (TiAlZr) N etc.) that forms as chemical vapour deposition superhard coating (diamond-film-like, diamond film etc.), multi-arc ion coating mode in actual production.Because above coating is thinner, generally be no more than 10um, and the bonding strength between coating and the hard alloy substrate is lower, therefore can not increase substantially the work-ing life of Wimet.The invention provides a kind of processing method of laser etching cobalt melting and fusing enhancing hard alloy, be to carry out pulse laser irradiation at former carbide surface, the evaporation that produces cobalt in active layer (thickness 20-60um) has improved the content of body materials such as WC, TiC relatively, body material and cementing metal realization consolidation reinforcements such as WC, TiC simultaneously, improve the metallurgical state and the bonding state of strengthening phase and matrix metal, will obviously improve the use properties of Hardmetal materials.
Summary of the invention
For the wear resistance and the work-ing life of improving Hardmetal materials, on conventional sufacing basis, improve the thickness and the bonding force of processing layer, a kind of processing method of pulse laser etching cobalt melting and fusing enhancing hard alloy is provided, it is characterized in that: the pulse laser that applies certain wavelength region at the Wimet outside surface carries out radiation treatment, cobalt element fusion in the Wimet and part evaporation, form certain thickness rapid solidification consolidation layer at tool surface, obtain the Wimet that a kind of laser selective goes cobalt and consolidation to strengthen.
A kind of processing method of pulse laser etching cobalt melting and fusing enhancing hard alloy, it is characterized in that: the outside surface to Wimet (cobalt contents mass percent 10-30%) carries out the processing of laser etching cobalt melting and fusing, the wavelength of used pulse laser is 248nm-1060nm, and power density is 1.0 * 10
6～9.9 * 10
7W/cm
2Scope, pulsewidth 10 psecs (ps)-90 nanosecond (ns), pulse number is 10-500, pulse-repetition 1-20Hz.
The treatment effect of this invention is: the thickness of laser melting layer is 20-60um, cobalt contents is 3-9% in the consolidation layer, binding agents such as Co, Ni, Cr and body material are the rapid solidification tissue, and this Wimet can be cutter or saw blade, is used for the processing of materials such as metal, timber.
Description of drawings
Fig. 1 Wimet laser melting laminar surface pattern
Fig. 2 Wimet laser melting layer cross section pattern
EDS EDAX results before Fig. 3 Wimet laser melting is handled
EDS EDAX results after Fig. 4 Wimet laser melting is handled
Embodiment
Embodiment 1
(1) trade mark of pending material Wimet is S4X7, be the W-Co-Ti kind Wimet, this Wimet typical use is lathe tool and cutting metal saw blade, size length * wide * the height of material is 10 * 7 * 4mm, before laser irradiation, carry out surface cleaning, remove the foreign material and the greasy dirt on surface with alcohol;
(2) pulse laser adopts the excimer laser of 248nm, and pulsewidth 25ns adjusts the laser beam light path, the relative workpiece vertical incidence of laser beam, and promptly input angle is 0 °;
(3) adopting the shaping homogenizing technology to obtain laser beam size is 7 * 5mm, utilizes the laser beam of this size to carry out the laser irradiation in point of a knife zone, and the power density of laser is 9.9 * 10
7W/cm
2, the pulse number of laser treatment is 500, laser pulse frequency is 20Hz, obtains the laser melting district of 7 * 5mm in blade face;
(4) product after the laser treatment is carried out quality test, observe at microscopically, Fig. 1 is the pattern of laser melting treat surface, can see the pattern of Wimet laser melting layer, Fig. 2 is a laser melting layer cross section pattern, and the cobalt contents of Wimet before and after the laser melting carried out the EDS energy spectrum analysis, Fig. 3, Fig. 4 is respectively the energy spectrogram that laser melting is handled front and back, the cobalt element mass percent was 17.77% before laser melting was handled, W elements 80.49%, titanium elements 1.74%, handling back cobalt element mass percent is 6.62%, W elements 91.72%, titanium elements 1.65%, laser selective goes the effect of cobalt very obvious, and the thickness of laser melting layer is 60um;
(5) practical effect shows, the corresponding raising of material hardness that laser melting is handled, and be 2.5 times of original product its work-ing life.
Embodiment 2
(1) trade mark of pending material Wimet is Kcr06, be the W-Co kind Wimet, this Wimet typical use is lathe tool or saw blade, and material is of a size of 10.5 * 3.4 * 3.0mm, before laser irradiation, carry out surface cleaning, remove the foreign material and the greasy dirt on surface with alcohol;
(2) pulse laser adopts the YAG solid statelaser of 1060nm, and pulsewidth 90ns adjusts the laser beam light path, and the input angle of the relative workpiece of laser beam is 45 °;
(3) adopt laser beam that precinct laser scanning is carried out in the zone of nose part position 3.4 * 4.0mm, the power density of laser is 1.0 * 10
6W/cm
2, the pulse number of laser treatment is 10, laser pulse frequency is 10Hz;
(4) product after the laser treatment is carried out quality test, Wimet is carried out the EDS energy spectrum analysis at the cobalt contents before and after the laser melting, cobalt element mass percent 15% in the composition before laser melting is handled, laser melting is handled back cobalt element mass percent and is reduced to 9%, laser selective goes the effect of cobalt apparent in view, and the thickness of laser melting layer is 20um;
(5) practical effect shows, the material that laser melting is handled, material are evident as 1.2 times of original product work-ing life.
Embodiment 3
(1) trade mark of pending material Wimet is Jcs03D, be cobalt chromium nickel tungsten series hard alloy, this Wimet typical use is lathe tool and saw blade, typical sizes length * wide * the height of material is 10.5 * 3.4 * 3.0mm, before laser irradiation, carry out surface cleaning, remove the foreign material and the greasy dirt on surface with alcohol;
(2) pulse laser employing wavelength is the picosecond laser of 532nm, and pulsewidth 15ps adjusts the laser beam light path, and the input angle of the relative workpiece of laser beam is 20 °;
(3) adopt laser beam that precinct laser scanning is carried out in the zone of nose part position 3.4 * 4.0mm, power density is 2.5 * 10
7W/cm
2, the pulse number of laser treatment is 300, laser pulse frequency is 1KHz, obtains the laser melting district of 3.4 * 4.0mm in blade face;
(4) product after the laser treatment is carried out quality test, Wimet is carried out the EDS energy spectrum analysis at the cobalt contents before and after the laser melting, the cobalt element mass percent is 14% in the composition before laser melting is handled, it is 6% that laser melting is handled back cobalt contents element mass percent, laser selective goes the effect of cobalt also apparent in view, and the thickness of laser melting layer is 40um.
(5) practical effect shows, the material that laser melting is handled, and be 2 times of original product its work-ing life.
Claims (1)
1. the processing method of a pulse laser etching cobalt melting and fusing enhancing hard alloy, it is characterized in that: the outside surface of the Wimet of cobalt mass percent 10-30% is carried out the laser etching cobalt melting and fusing handle, the wavelength of used pulse laser is 248nm-1060nm, and power density is 1.0 * 10
6～9.9 * 10
7W/cm
2Scope, pulsewidth 10 psecs-90 nanosecond, pulse number is 10-500, pulse-repetition 1-20Hz.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100920309A CN101643824B (en) | 2009-09-04 | 2009-09-04 | Technology method for pulse laser etching cobalt melting and fusing enhancing hard alloy |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100920309A CN101643824B (en) | 2009-09-04 | 2009-09-04 | Technology method for pulse laser etching cobalt melting and fusing enhancing hard alloy |
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| Publication Number | Publication Date |
|---|---|
| CN101643824A CN101643824A (en) | 2010-02-10 |
| CN101643824B true CN101643824B (en) | 2011-09-07 |
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| CN104942441B (en) * | 2015-05-26 | 2016-06-01 | 辽宁思达思克实业有限公司 | Laser spots configuration melts solidifying strengthening cone crusher rolled mortar wall and the method for broken wall |
| CN110614368A (en) * | 2019-11-07 | 2019-12-27 | 常州英诺激光科技有限公司 | Method for improving density of 3D printed part through laser processing hardening treatment |
| CN113502389A (en) * | 2021-07-28 | 2021-10-15 | 深圳市博厚精密金属制品有限公司 | Method for improving wear resistance of hardware stamping die |
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| C10 | Entry into substantive examination | ||
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| C14 | Grant of patent or utility model | ||
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| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Hunan Keheng Electric Co., Ltd. Assignor: Beijing University of Technology Contract record no.: 2011430000289 Denomination of invention: Technology method for pulse laser etching cobalt melting and fusing enhancing hard alloy Granted publication date: 20110907 License type: Exclusive License Open date: 20100210 Record date: 20111226 |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110907 Termination date: 20130904 |