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Can also prepare traditional metallurgical methods can not get some special materials, such as superconducting alloy, the surface of metal, glass, etc.. Compared with the ordinary arc surface hardening and plasma spraying, laser alloying has the following advantages. The laser radiation energy is highly concentrated, can be transported over long distances through the air. Is a fast approach, the efficient use of energy. Power density can be accurately controlled and the heating rate and thus a small deformation, while the arc hardening, plasma spraying is the uneven heating and cooling, thermal shock in the quenching process, resulting in cross-shaped and cracking, it often requires straightening and grinding processing. Triple-color animationchina laser pointer will be introduced.
Enable inaccessible and local area alloying, and the use of deep focus of the laser, available on the irregular parts uniform alloying depth. Based on the above characteristics, laser alloying in the metal processing industry gradually began to get a variety of applications. Substrates have so far is suitable for laser alloying of plain carbon steel, alloy steel, stainless steel, cast iron, cobalt and aluminum alloy, the alloying elements Cr, Ni, W, Ti, Mn, B, and V, of Co, Mo. Laser alloying process are generally three types: preset material law, the hard particle injection at the same time and gas alloying. The gradually drawing and speed of china laser pointer have been enhanced.
The more common methods used. Alloy powder by electrochemical deposition, vapor deposition, ion implantation, brush, diffusion layer remelting, flame and plasma spraying binder coating and other methods will be required prior Xu overlying surface alloying and laser heating melting on the surface to form a new alloy layer. This method is commonly used by some of the iron-based surface alloying. The requirements of the deposited film is to clean the substrate film interface as a smooth surface. Thin membrane of the preset can usually be means of vapor deposition, vacuum sputtering, ion implantation, etc. obtained for the production of thick preset film. Can be used in electroplating, spraying, rolling, diffusion (boronizing), pre-coated alloy powder or diaphragm and other methods. china laser pointer has the application of laser advertisement and laser projection.
Hard particle injection at the same time France. Hard plasma jet at the same time France is characterized by melting the surface of the substrate in the laser spray man alloy powder or hard particles to the molten pool at the same time in order to achieve surface alloying. The thickness of the laser gas alloying: refers to the appropriate atmosphere (nitrogen, carburizing atmosphere), using laser heating and melting the surface of the substrate surface by the reaction of gases in the atmosphere and the substrate, than those of normal solid-state reaction processing thickness is much greater. It is mainly soft substrates A1, Ti and its alloys, alloying process, namely, availability of TiN, TiC or Ti (C, N) surface compound layer, the hardness of up to l 000Hv. Convection in molten pool, the alloying elements can quickly penetrate the deeper parts. The scanner of green laser pointer is equipped with the large-angle scanning.
The laser alloying layer microstructure. The microstructure characteristics of the laser alloying. The organizational characteristics of the laser surface alloying layer is uneven alloying organizations. Include three aspects: First, the alloying bath uneven, and organization will appear in its cross-sectional gradient; alloying the molten pool of macro-organizational heterogeneity; third is referred to earlier cyclical change area of overlap of the alloying area. Gradient in the organization, the common composite tissue has three characteristics: flat crystal - cellular dendrite - cellular dendrite - dendrite; cellular dendrite - cellular dendrite - dendrite; cellular dendrite - dendrite. The flash disk port vigorously develops together withchina laser pointer.