green laser pointer should be obvious in the laser beam

green laser pointer should be obvious in the laser beam.
According to relevant statistics show that: stress corrosion cracking caused by accidents accounted for more than 60 percent of the corrosion damage accident. Austenitic stainless steel due to poor

thermal conductivity, linear expansion coefficient, low yield point, easily deformed during welding, the welding deformation is restricted, welded joints is bound to residual welding residual

tensile stress, accelerate the corrosion of the role of media. Therefore, the welded joints of austenitic stainless steel is prone to stress corrosion cracking, which is one of the most difficult

to resolve the problem of welding of austenitic stainless steel, especially in chemical equipment, stress corrosion cracking phenomenon often. Stress corrosion cracking of surface features are: the

crack on the weld surface. The brightness of the laser beam of green laser pointer can meet the needs.Sometimes, some green laser pointer need to be preheated for 2 or seconds
Cracks parallel and nearly perpendicular to welding direction; crack slender and tortuous, often throughout the site of the black pitting. From the surface to an internal extension, pitting is

often the root causes of the crack, the crack usually transgranular extended crack tip often branching, crack whole dendrimer. Serious cracks through the fusion zone to the heat-affected zone. To

prevent stress corrosion cracking of measures. Rational design of welded joints. Media aggregation, reduce or eliminate the welded joint stress concentration in the welded joints to avoid

corrosion. Eliminate or reduce the residual stress of welded joints. Eliminate the stress treatment after welding is a commonly used process measures, the heating temperature is between 850 ~ 900

℃ in order to be ideal to eliminate the stress effect. green laser pointer is less than 10Mw or 20mW in the power. 
In such steel carbon content below 0.03% Ti, Ni, can significantly improve its resistance to intergranular corrosion. Concentrated nitric acid of high silicon austenitic stainless steel with good

corrosion resistance. Austenitic stainless steel with a comprehensive and good overall performance, a wide range of applications in all walks of life. For welding of stainless steel laser welding

performance. The thermal conductivity of austenitic stainless steel is only carbon steel 1/3, the absorption rate is slightly higher than carbon steel. Therefore, the melting of austenitic

stainless steel deep deep than ordinary carbon steel 5% to 10% of Cr-Ni system, stainless steel, laser welding, the material has a high absorption rate. CO2 laser welding of austenitic stainless

steel.