the green cell phone jammer is well received in the actual market

 Weld when welding point more than 90% overlap rate in line with requirements, but also to choose according to the roughness of the workpiece and welding requirements. 3.1.3 Butt weld metal impact of the welding voltage is 260V, pulse width of 12ms, the welding speed 300mm/min, process parameters, power 376W, frequency changes when the weld organization chart shown in Figure 3.4. As can be seen from the figure, the organization of the butt weld all thick cylindrical ferrite. This is because the weld solidification crystallization is the process of nucleation and grew up, due to the characteristics of laser welding heat fast cooling fast, bath center and the edge there is a big temperature gradient, leading to columnar grains in the weld development.
DC06 side of the heat affected zone in the frequency of changes in the organization (2) the M170P side of the heat affected zone, as shown in Figure 3.7 is the frequency change the M170P side of the heat-affected zone organization, can be seen from the figure the organization the M170P side of the heat-affected zone distribution points, or lamellar structure in the ferrite, at the same time, more pronounced with increasing frequency, these non-ferritic structure. Figure 3.7 The change of frequency 22Hz, 20Hz 3 # organizations a total of 26 of the the M170P side of the heat affected zone of Anhui University graduation project (thesis) report on paper This is because in the welding process, the heat-affected zone heating makes 1 # 2 #, 18Hz solid solution of carbon and other alloying elements in ferrite in the aggregation of the local area and increasing carbon content. The focusing ability of the green laser beam light of  cell phone jammer is as good as other kinds of laser beam lights.
Quenching process in the subsequent cooling process is equivalent to the affected zone, so the formation of bainite and martensite in the heat affected zone. Figure 3.8M 170P side of the heat-affected zone SEM images of Figure 3.8 the the M170P side local heat affected zone of the SEM image can be seen from the figure: in the the M170P side local heat affected zone is the set of ferrite distribution with granular bainite and lamellar martensite, while a white precipitate. This is because the heat affected zone in welding process, solid solution alloying elements in the ferrite aggregation, which contain carbon, phosphorus and other elements. Heat-affected zone near the weld region in the cooling process in the formation of quenched martensite and bainite, the carbide precipitation. So that the green  cell phone jammer is well received in the actual market.