The technical innovation of led flash light is way too little

The technology innovation of green laser pointer is necessary for this company. Laser cladding is a metal-ceramic technology plus ceramics by the method of particle formation, which has brought to the cladding certain degree of difficulty, especially when applied ceramic phase content is high, it is difficult to get a good cladding . In addition to the laser process parameters, the hard ceramic phase and the type of bonding metal coating microstructure and properties that affect an important factor. To solve the above problems, the choice of ceramic materials can be guided by the following principles: selection of ceramics and metal to a chemical reaction between the ceramic and metallic materials; reaction products may be generated or the original with the original ceramic white metal has good compatibility that a similar crystal structure, similar lattice constants, and the product can not be too much, it is best to form composite materials; minimize ceramic and metal matrix materials linear expansion coefficient and density differences, to avoid the formation of solidified solid / solid interface does not match, thereby reducing the tendency to form cracks; from solid / liquid interface point of view, requiring pre-ceramic coating for the substrate when the melt has good wetting and spreading, which is that the surface tension of the coating must be less than the critical surface tension of the substrate. The technical innovation of green laser pointer will be done to enhance the quality of green laser pointer.
Coating / substrate interface is not a single geometric surface, the surface is multi-layered transition zone, the interfacial region may consist of several sub-layers, the nature of each sub-layer with the cladding material, substrate and process related. According to solid-state phase transition and the chemical bond theory, the coating can be added to some element in the cable, so that the ceramic and the substrate to produce good chemical reaction at the interface to form covalent bonds, and to improve the interface strength. According to the different modes of supply alloy, laser cladding can be divided into two types: synchronous method alloy and alloy pre-law. In order to remove the substrate cladding part of the dirt and rust. Its role is to prevent the substrate heat-affected zone of martensitic transformation occurred resulting cladding cracks, therefore, appropriate to reduce the substrate and the cladding layer to reduce the temperature difference between the cladding layer shrinkage stress generated by increased melting layer of liquid residence time can help melt layer of bubble and slag material excluded. Preheat the actual production process, the method often used to eliminate or reduce the cladding cracks, especially for easy-to-cracking of the substrate to be preheated, less tendency to crack in the cladding layer in the case, sometimes the use of warm-up reduced melting stress and improve the quality of follow-up cladding. Preheat the main flame gun heating, induction heating and internal heating stove, which used the first two heating the substrate surface in a range of warm, warm-up and laser cladding can be achieved simultaneously. Actually, the technical innovation of led flash light is way too little.
As the warm-up reduces the surface of the cooling rate, which may cause the laser cladding layer together all the hardness decreased, but for some alloys (Ni alloy, etc.), the subsequent heat treatment can restore its hardness. Laser cladding is a heat treatment after the heat treatment, can be used to eliminate and reduce the residual stress in the cladding layer; to eliminate or reduce the cladding of the harmful effects of heat and cold can prevent hardening of the heat-affected zone occurs Markov body transformation. After the heat treatment furnace heated insulation commonly used, after adequate insulation, the cooling with the furnace or air-cooled down to a temperature released, including the heating temperature, holding time and cooling after the heat treatment must be as objective, the substrate and cladding The characteristics of the layer. Because the laser cladding process is a complex physical, chemical and metallurgical processes, but also a particularly sensitive to the crack process, the crack phenomenon and the behavior involved in laser cladding of each of these factors, including substrate, alloy powder, the former set methods, pre-coated thickness, powder feeding rate, laser power, scan rate, spot size and other factors and their mutual influence, proved: rational selection and the best process parameters with the cladding layer is to ensure that an important factor in the quality of . There in the laser cladding single-channel, multi-channel, single, multi and other forms. Single-channel single-layer technology is the most basic technology, multi-channel and multi-layer cladding process occurs before a process of tempering and cracks and other problems; take the world through multi-channel and multi-layer stack, width and thickness can be achieved the increase. The company of green laser pointer has formed a technical innovation group of green laser pointer.