The goggle of green laser pointer is to protect their eyes

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When the electron beam bombarding the metal surface, the flow of electrons and the material of atomic collisions, and to atomic energy, electron flow through the depth of the material depends on the accelerating voltage level and the size of the material density. For example, the theoretical penetration depth of 150 kilowatts of energy electron beam on the iron surface is about 0.076 mm up to 0.16 mm in aluminum on the surface, due to bombardment by the electron beam within a very short time-intensive energy surface, the surface The temperature rapidly increased matrix remains cold state. When the electron beam to stop bombardment, heat quickly to the cold substrate metal diffusion, so that the heating surface self-quenching. In order to effectively carry out at least to maintain the ratio of 5:1 between the self-quenching, the volume of the volume and quenching of the entire workpiece surface. The goggle of green laser pointer is to protect their eyes.
Electron beam heating surface, the surface temperature and related to the depth of hardenability in addition to electron beam energy of bombardment time is closely related to bombard a long time, high temperature heating depth, but if the long bombardment time. the base metal is heated, it will affect the self-quenching. Therefore, the testing of proper understanding of the relationship among the parameters, as well as to reach the required depth of hardenability. Figure 6 is a cross-sectional photographs of the electron beam heat treatment of the automatic ball head bolt. The photos show that the hardened layer formed on the surface of the workpiece contour, a depth of 1.5 mm, the radius of the ball head stud of about 19 mm. Electron beam heat treatment due to fast heating, the austenite time only a few tenths or even shorter. For the invisible laser beam light emitted by green laser pointer .
The log of green laser pointer can record the sales situation
Very fine grain, hardness higher than normal heat treatment the results. Figure 7 is 1.55 kilowatts / plate 2 m of the electron beam the heating AlsI4150 steel automatic transmission micrographs of the clutch parts. Made it clear that the figure of a 4.6 mm fine grain structure of the hardened layer, and the grain of the matrix material, the mutation. This fine-grained surface layer is the formation of self-quenching in 0.8 seconds after heating.