Apply of laser metal frit (LMD) use at finishing, can improve the exterior performance of the spare parts effectively, can save resource and cost again at the same time. By grinding, erosive, high pressure, heat, acidity wears away with what humidity causes and corrode, in appearing in oil to drill industry not just. The material that makes a person intractable wears away and the damage issue of high component, in aerospace, machinist job and a lot of heavy industry domains, also bring about many expenditure. Be aimed at these problems, use heat treatment, machining, electrochemistry and other finishing method normally. Near future research is more collateral effective method is apply of laser metal frit (LMD) , this method is the United States in 20 centuries 70 time development rises, but in restrict all the time inside a few years at first inside martial domain, lab and research organization of a few science. Just be in the last few years, art ability begins this kind of welder that is based on laser technology in be being used at automation industry. Laser frit apply solders have a variety of use. For example, finishing can be used on oil extraction equipment, the function that can optimize specific data can satisfy special requirement. Through combining different material, engineers can determine the good performance of component surface. Different metallic powder is OK and alternant deposit, form layer of peculiar frit apply, the stuff with good tenacity can have hard face at the same time, adiabatic matrix but layer of the electric conduction on frit apply. Besides improving component quality, LMD is returned but resource conservation and cost. In low-cost mother if material is cast-iron go up material of deposit layer high quality, already also got applied extensively. Used law of this one party to raise the feasibility of repair component greatly. Laser frit apply is OK the structure that repair damages, need not discard thereby or change far the part that did not obtain service life. For example the engine of the plane normally can by repair. Bump when birdie when causing blade to damage, use LMD to have repair time of newer than changing part is short, charge province, the price is the 1/6~1/7 of new part only, and the quality of the lamina after repair and dependability and new part differ very few. Additional, car maker often uses laser deposit to come the figuration mould with costly rehabilitate. What go up in industry besides these is full automatic outside turning application, also have send silk or semi-automatic the artificial operating system that changes pulverous nozzle, apply at mould and the rehabilitate of tool structural member for example. Subtle to those need modification or the product that design change and to wrong technology revise, laser beam welding receives craft to be able to reduce cost greatly. Deposit can be mixed in short time, low cost the mistake is revised below lightly circumstance, implementation spare parts sets size beforehand, repair ageing spare parts, preserved the material function of original part and carrying capacity at the same time. Solid laser and CO2 laser all can be used at laser frit apply to solder. The function with peculiar laser, be like focusing sex and energy density, make its make tool of ideal of metallic layer connective. With its he solders methodological photograph is compared, the combinative performance of LMD is good, have very good reliable repeatability, hot influence area is very small, fast refrigeration can come true without be out of shape solder. Different material can mix together, and can solder in a few traditions the area that the method cannot reach and place implementation solder. Solder to nicety, it is OK to stimulate beam of light focusing arrives the limits that is less than 50 μ M. If need layer of big planar frit apply, can use make stimulate beam of light to leave anxious way. Stimulate light energy to be able to be controlled accurately, overheat input causes solder frit is appeared or possibility of joint place metabolic is very little. Deposition rate can be as high as 300cm3/h, power of this and facula dimension, laser and traversal speed have affinity. Inspect specific application condition and decide, limits of ply of frit apply layer is 0. 1~2mm. Adding material is very costly normally, pulverous utilization rate can be amounted to in deposit process 90% . The base material of workpiece is iron, nickel, titanium or cobaltic alloy normally. It is OK to add material to divide as identical as base material beyond, also can be it is with cobalt or nickel base tungsten, titanium and chromic carbide. Component part can pass mill, grind, auger, car, corrode or heat undertakes handling, enrage deposit law with physics next (PVD) or deposit law of chemical gas phase (CVD) undertake polishing to workpiece, erode and besmear Fu. Solder of laser frit apply is one kind has a variety of potential use solder newly method, basically use at the rehabilitate of material at present. Repair solder has remarkable additional cost, course expenses is very few. But on the other hand, pass systematically the technology that cement data will come improve workpiece spy to decide function is not quite mature still, the repair method that uses solder of apply of frit of this kind of laser completely so still is compared relatively little. Batch of the geometrical size scope of the spare parts, treatment and a variety of craft parameter and its variable are right whole solder system and laser technology posed a challenge. Current, apply of frit of this kind of laser solders the technology basically applies extensively at the domain such as nautical, aviation, manufacturing industry, agriculture machinery, in the meantime, the manufacturer of product of a few high end also uses this kind of technology to produce engine. CNC Milling
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