The power of green laser pointer is no less than 30mW

The power of green laser pointer is no less than 30mW.
The experiments show that the laser heating 50 to 200us material begins to melt, the formation of liquid metal and asked the sub-vaporization, the formation of city-pressure steam, and at very high

speed jet, and a dazzling white. At the same time, high concentrations of vapor liquid metal movement to the weld pool edge, the formation of depression in the weld pool center. When negative

defocus, the power density of material internal surface area is also high, easy to form a stronger melting, vaporization, so that the light pass deeper into the material. Therefore, in practical

applications, when the requirements of the penetration depth larger, the use of negative defocus; when welding thin materials, Harbin Institute of Technology is preferable to being 12 defocus.

Austenitic stainless steels, austenitic stainless steel at room temperature. The specific and detailed requirements of green laser pointer are as follows.
It is the preheating time of green laser pointer
Steel containing Cr of about 18%, Ni 8% to 10% of C about 0.1%, with a stable austenite. Austenitic chrome-nickel stainless steel, including the famous 18Cr-8Ni steel and Cr, Ni content increase on

this basis and join Mo, Cu, Si, Nb, Ti and other elements of high Cr-Ni series steel. Non-magnetic austenitic stainless steel with high toughness and ductility, but lower strength, the phase

transition to the strengthening can only be strengthened by cold working, such as by adding the element of S, Ca, Se, Te, has a good cutting. Such steel in addition to the oxidation resistance of

acid corrosive medium, containing Mo, Cu and other elements also resistant to the sulfuric acid, phosphoric acid and formic acid, acetic acid, urea, etc. corrosion. green laser pointer for the star

gazing has very high requirement.More actions of green laser pointer have been taken in the workshop.
Possible conditions for the rules of the weld seam on the back can be used pure copper pad and copper pad with water or protective gas forced cooling, to prevent intergranular corrosion of welded

joints, because the rapid cooling can prevent the formation of chromium depleted layer. Solution heat treatment or stabilization treatment. The heat treatment of austenitic stainless steel solution

treated and stabilizing treatment.