The metal adds application of material metallurgy technology

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Although implementation adds capable person,production technics has a variety of, but treatment mechanism agrees basically, namely material melts quickly below action of high-energy heat source, because effect time is extremely short, the metal of melt happens below the cooling action of matrix fast and caky, come true to shape in specific scanning area thereby. The performance that adds material to make product reachs decision of craft parameter place by character of attribute of heat source quantity, material, and it is divisional that heat source type reachs kind sending pink all sorts of the most essential elements that add material to make a technology. Material is added to create a field in the metal, using most mature heat source is laser and high-energy electron beam. The working principle of electron beam and laser is different, of electron beam heat means is high-energy electron crosses the surface of target material to be entered be apart from the surface after certain deepness, pass target timber nuclear energy to measure again, make target material atomic oscillatory thereby aggravate, heat what kinetic energy changeover of the electron is laser of heat energy; means draws photon energy for target material surface, laser did not cross target material face. In process of material production treatment, the power of heat source and scanning speed are constant commonly, namely action the energy density at material is constant, result of heat source action can be decided directly to the absorbency of heat source by material. The material absorption to heat source energy is decided by the element place such as condition of surface of both action mechanism, material. To the most commonly used laser heat source, the reflectivity of the absorption of laser light energy and wavelengh, material that be illuminated and energy density are relevant, in shape in the process, the restricting that the element such as the exterior condition of material, dimension shows to laser Dou Youming action. Electron beam because of its action mechanism different, show in adding material to make a process relatively laser is more good comfortable match a gender. Pulverous material is current most commonly used metal kind add material to make with material. Metallic powder makes the most important one ring in adding material to produce industrial chain as the metal, also be the greatest value place. Material of metallic pink body is used at pulverous metallurgical industry commonly, it is will pulverous that pulverous metallurgy shapes condition of high-pressured high temperature is used to undertake finalizing the design finally after shaping beforehand, in whole process, the physical metallurgy change of material happening is relatively slow, material has more sufficient time to undertake confluence, diffuse, reaction. Because accept the restriction of the temperature when pulverous metallurgy is machined and pressure, to assure the compact sex of workpiece, the powdery body data that the requirement uses will shape as far as possible housing fill is complete. Be aimed at the technical characteristic of pulverous metallurgy technology, had developed the pulverous assessment technique that gave to be perfected quite and standard, the index that perfects quite relatively can use the property of material of constant pink body, rate of density of density of body of the diameter that be like bead, area that compare a list, particle size distribution, pink, velocity of flow, loose outfit, hole. To pulverous metallurgy, pulverous fluidity, brace up the index such as solid density is the main index that measures pulverous metallurgy to use pulverous data. Photograph comparing has the workmanship that add capable person and pulverous metallurgy technology to be distinguished apparently, the metallurgy change that pulverous material issues in heat source action is extremely fast, shape material of body of the pink in the process and heat source are immediate action, powdery body material does not have the action of the tie of the mould and exterior and abiding pressure. The powdery body material that thinks the diameter is less than 1mm commonly is applied to add material to make, the powdery body material that bead diameter controls in 50 μ M is had better shape function. Compare with photograph of pulverous metallurgical industry, at present home has not formed mature assessment technique or the standard decides pulverous material and the applicability of the workmanship that add capable person, the research that increases material to make the relevant assessment technique that uses powder and index need further development and think. CNC Milling CNC Machining