Some problems or malfunctions of green laser pointer

 Some problems or malfunctions of green laser pointer are caused therefrom.
Room temperature, the weld microstructure are very different in the respective local area close to the parent material. At high temperatures, weld cast austenite first precipitation ferrite near

the 1.5mm base metal side of the weld metal cooling rate slower, first of ferrite is easy to grow up to generate a greater number of massive ferrite body, granular bainite and Widmanstatten

structure, as shown in Figure 1.14; near the 0.7mm base metal side of the weld, the weld metal cooling rate of a relatively small number, the formation of ferrite, and mainly distributed in the

grain boundaries, and a large number of upper bainite, as shown in Figure 1.15. From the thick side of the base metal to weld to the parent material of the thin side, at intervals of 3 mm measuring

a hardness value. The damage caused by the long time continuous use of green laser pointer will not warranted.
The hardness of the weld and heat affected zone of distribution shown in Figure 1.16, can be seen from the figure, different thickness Tailored Blanks weld metal and heat affected zone hardness

values of different thickness ratio is greater than the parent metal, heat affected zone phenomenon does not appear to soften. Figure 1.14 1.5mm base metal side of the weld microstructure in Figure

1.15 0.7mm base metal side of the weld microstructure of 1.16 ranging from thick welded joints hardness distribution (3) TRANSACTIONS [21] on the chemical composition (mass fraction): C 0.08%, Mn

0.40%, P 0.025% S 0.020% of the ST14 welding experiments. 0.8 mm/1.5mm thick ST14 steel laser welding, the welding parameters are: laser power of 217 kW, welding speed 219 m / min, weld the final

microstructure of ferrite and acicular sorbite + Wechsler organizations + granular bainite, as shown in Figure 1.17. The client misoperates green laser pointer .
Granular bainite is massive or acicular ferrite contains some carbides and irregular islands of tissue. These island-like organization is retained austenite, and high carbon austenite. When the

welding conditions change, the form of granular bainite with welding thermal cycling conditions change. Cooling speed, Anhui University, granular shell $ 16 graduation project (thesis) report on

the paper's body smaller particles, the slow cooling rate of island grew significantly. Rapid cooling to the formation of granular bainite than martensite steel weld hardness is relatively soft,

the order in favor sheet deep drawing process. Actually, the manufacturer will definitely guarantee the high quality of green laser pointer .Also, much attention should be paid to the safety and

security of the personnel of green laser pointer