Although almost all metallic stuff have very tall reflectivity to infra-red wave energy in room temperature, but the CO2 laser that shoots beam of light of 10.6um of the wave band outside be in Yuan Gong or the successful laser cut practice that use at a lot of metals. The metal stimulates the initiative absorptivity of beam of light to have 0.5%~10% only to 10.6um, but, the focusing that should have power density to exceed 106w/cm2 stimulates illuminate of beam of light to arrive when metallic surface, can make the surface begins to fuse very quickly inside the time of small second class however. The absorptivity of the most metal that is in melt condition rises quickly, can raise 60%~80% commonly.
(1) carbolic steel.
System of contemporary laser cut is OK the biggest ply of cut carbon stencil steel can amount to 20MM, use oxidation of steel of carbon of cut of fused cut mechanism cut seam controallable the width limits in satisfaction, to thin plate its are cut seam but narrow control to 0.1MM.
(2) stainless steel.
Laser cut is made to using stainless steel sheet metal is an effective treatment tool for the manufacturing industry that gives priority to component part. Below the hot input measure in controlling laser cut process strictly, can restrict the heat that cut a margin to affect an area to become very small, thereby very effective maintenance the good corrosion resistance of this kind of material.
(3) alloy steel.
Steel of most alloy structure and alloy tool steel can use laser cut method to acquire the good quality that cut a margin. Even if material of a few high strenth, want craft parameter only control is proper, can obtain flat, without stick broken bits to cut a margin. Nevertheless, the steel of high speed tool to containing tungsten and hot model steel, the meeting when laser cut has frit corrode happens with phenomenon sticking broken bits.
(4) aluminium and alloy.
Aluminous cut belongs to fused cut mechanism, place basically is used at boasting melt product from cut area with auxiliary gas, can acquire better tangent plane quality normally. To certain aluminium alloy, should notice precaution is cut seam the surface small break arises between brilliant.
(5) copper and alloy.
Pure copper (red copper) as a result of too tall reflectivity, basically cannot wash cut of beam of light with CO2. Brass (copper alloy) use taller laser power, auxiliary gas uses air or oxygen, can have cut to smaller plate.
(6) titanium and alloy.
Focusing of can very good coupling stimulates pure titanium the heat energy that beam of light changes, chemical reaction is intense when auxiliary gas uses oxygen, cut rate is rapidder, but cutting an edge easily to build oxidation layer, still can have caused not carefully burn. For reliable for the purpose of, use air to had been compared as auxiliary gas, in order to ensure cut quality.
The quality of cut of titanium alloy laser with aircraft commonly used manufacturing industry is better, although cut,seam bottom meeting to a few sticks broken bits, but keep clear of very easily.