Laser of high power whole solid state applies mediumly in laser frit Fu
- source:WEDEMEYER CNC Machining
The laser of 6um cannot be passed fiber-optic conduct, flexibility gets great limitation, implement three-dimensional part not easily the frit Fu treatment of complex curved surface, cannot maintain to the spot more. Laser of solid of YAG of pump of domestic traditional lamp, power is lesser, it is 100 made of baked clay level, low-cost, volume is relatively minor also, safeguard relatively simple, but every other paragraph working hours needs to change pump Pu Deng. Because power is not great, the efficiency that its machine and applied limits suffer be restricted. At present fiber-optic coupling outputs foreign popular high-power the semiconductor laser that semiconductor laser and plastic focusing output directly will make technology of laser frit Fu, its have light produced by electricity to change efficiency tall, volume is minor wait for an advantage. But existence technology threshold is high, laser cost price is high wait for confine. And the laser of whole solid state of high power is to use semiconductor laser array to regard pump as Pu Yuan, it is working material with YAG crystal, of integrated semiconductor laser efficient advantage of as mature as YAG laser technology, have output power is great (1~5kW) , quality of beam of light is good (BPP is worth 8~40mm*mrad) , output stability is good, efficiency of changeover of light produced by electricity is good (~20% ) , flexible good, fiber-optic transmit can match robot and CNC machining machine tool to achieve a lot of advantage such as three-dimensional treatment neatly (if pursue,1 is shown) . Laser frit Fu because its extremely high energy density, can fuse almost all alloy and pottery and porcelain. Be able to bear or endure to raise the wear-resisting of spare parts surface further corrode function, began the compound coating research that sets WC, TiC, SiC and B4C to wait for photograph of horniness of pottery and porcelain in frit of dissolvent of alloy of iron, nickel, cobalt radical extensively domestic and internationally at present. WC is the horniness material with admirable wearability, nickel radical alloy has very good wetability to WC. Accordingly, use the coating of Ni/WC pottery and porcelain with good performance of wear-resisting of preparation of technology of modified of surface of laser frit Fu to have fair academic value and applied value. But the existence is apparent interface between alloy dissolvent and photograph of horniness of pottery and porcelain and bigger function difference, appear easily grain of pottery and porcelain falls off, the problem such as stress concentration and generation crackle. In frit Fu craft to this the occurrence problem such as crackle, stoma wants to be optimized from craft on begin to solve, if optimize laser parameter craft, use warm-up and postheat processing to wait. Nextpage uses laser of high power whole solid state to be aimed at difficult problem of Fu of composite material frit of nickel radical WC to begin craft experiment research, use laser of whole solid state of 3kW high power, choose 800um core path fiber-optic transmit, cooperate a robot to achieve orbit exercise, cooperate lens of integral of beam of light to get even rectangular facula, facula size 8 × 2mm2, undertake broadband frit Fu. Frit Fu material is nickel radical pink to add grain of carbonization tungsten WC, WC grain cent is lump and ball appearance, mother capable person is material of alloy of Inconel718 high temperature. Opposite at common frit Fu, fu of laser broadband frit uses the rectangular facula that technology of plastics of beam of light gets, changed laser energy to show the inhomogenous sex of the circular gauss facula that gauss distributings, make light intensity distributings even, if the graph is shown 2 times, can form division of wider frit Fu, decreased to build greatly receive an amount, convenient undertake bedding face accumulates frit Fu, the combinative department that avoids to be taken in photograph adjacent scanning appears 2 times to heat, the limits that widened industry applies. With system of Fu of frit of laser of whole solid state of above 3kW high power, optimize craft parameter and flow, if the graph is shown 3 times,machine gotten spare parts result. Analyse result of quality of its coating metallographic, if the watch is shown 1 times, can see, no matter be lump WC grain, grain of globose still WC is in cladding of nickel radical frit all distributing equably for mass, frit cladding appears without the visible defect such as aperture of macroscopical crackle, air. Control of frit cladding ply is in 1.
Between 5mm~2mm, frit cladding from go up to be from minutes: Heat of capable person of frit cladding, frit cladding and interface of union of mother capable person, mother affects capable person of area, mother to organize 4 parts. Among them frit cladding and mother capable person are united in wedlock for metallurgy, and the attenuant rate control that mother capable person organizes to frit cladding is in 8% less than. Test of frit cladding hardness makes clear as a result, the hardness of grain of the WC in frit cladding is in limits of 2500 ± 500HV, average hardness is cladding of Ni radical frit 923.
5HV, the smallest hardness is the matrix in frit cladding 411.
7HV. The place on put together is narrated, laser of high power whole solid state is reached by right of its function characteristic in the craft advantage with distinct domain of laser frit Fu, used laser of 3kW whole solid state to develop Ni radical of laser frit Fu successfully to add the compound coating of grain of horniness of high proportion WC, obtain great application breakthrough in the industry domain such as oil machinery. CNC Milling