Laser application more and more widely, more and more in-depth people's lives. Let us for the analysis of a small plane in laser application: laser in aluminum alloy surface fused, alloying and cladding technology. Speak of from the properties of magnesium alloys, its than strength, high stiffness, small density, good thermal conductivity, good electromagnetic shielding characteristics and excellent properties such as damping suspension. Magnesium alloys become irreplaceable important material in the modern life, has gradually replaced many aluminum, zinc, cast iron and other materials, is widely used with the cars, traffic, aerospace and other fields. The application of magnesium alloys have a high degree of attention, so to understand and study the surface treatment of magnesium alloys is also very necessary.



what is a laser fused? It is the use of high power density of laser interaction within a very short time and metal, the metal surface local instantaneous heated to very high temperature and melt, then with the help of the cold metal matrix absorption of heat and heat transfer process of molten metal surface rapid solidification, which changes the microstructure and mechanical properties of parts surface. Because this process is done under rapid heating and rapid cooling, so get organization of hardening layer is thin, the hardness is higher than that of conventional quenching hardness. The technology improved the metal materials and parts surface hardness, wear resistance, corrosion resistance and strength and high temperature performance, etc.



we try under the condition of vacuum, fused AZ91HP magnesium alloys for the laser processing. We found that laser fused magnesium alloy layer mainly by & alpha; 3 / Mg and & beta; - Mg17Al12 phase. With the increase of the laser scanning speed, fused layer hardness, wear resistance also will increase. But under different scanning speed, laser fused magnesium alloy corrosion resistance than matrix layer decreases, and with the loss of the scanning speed, the fused layer increased corrosion resistance decreased.

by KrF laser irradiation under vacuum conditions in polished AZ3lB4H sample surface. Find the sample surface microscopic morphology of corrugated, and compared with no processing the surface of the sample after laser treatment is tensile stress. Laser processing layer 30 & mu; M microhardness is lower than that of the substrate, the laser treated samples have great improved corrosion resistance.

using Nd: YAG laser, DDube on two kinds of magnesium alloy AZ91D and AM06B fused laser treatment, the microstructure in dendritic, grain size refinement, although after laser heat treatment of AM60B magnesium alloy corrosion resistance than AZ91D, but didn't get significant improvement. Even under some parameters can significantly reduce corrosion resistance. Yaojun for laser fused in the surface of AZ91D mg alloy, such as the microstructure of the formation of fused relatively uniform, accordingly improve the wear resistance of laser fused layer. On 2 kw cw CO2 laser, G. Abas on A3Z1, AZ61 and WE43 magnesium alloy surface by laser fused, fused specimen under 20 ℃ was submerged in the pH value of 10. Sodium chloride (5 The mass fraction of 5%) 10 d in the solution, the result shows that after laser fused magnesium alloy corrosion resistance improved, refine the microstructure of alloy, increases the alloy elements in. Phase of solid solution concentration, make & beta; Phase distribution more uniform, formed the corrosion resistant layer 1.



laser surface alloying is what? Its is by melting substrate surface coating film layer and part of the substrate in advance or at the same time of surface melting note some powder, coating or surface rapid solidification in the aftermath of the liquid mixture in the molten pool, thus formed in the surface layer 1 has expected performance of the alloy thin layer, in order to improve the performance of matrix. In recent years, aluminium and aluminium alloy is more active, laser surface alloying research for magnesium and magnesium alloy of the research of laser surface alloying is not a lot.



by using laser on the magnesium substrate Mg and Al alloying, TEM selection electron diffraction spots discovered the existence of the magnesium alloy, corrosion resistant properties of the samples is better than that of cast magnesium and magnesium alloys. RGalun etc. Use the element such as aluminum, copper, nickel and silicon, using 5 kwco2 laser of the magnesium alloy surface alloying. The melting depth is 700 - 1200μ M, the surface hardness of 250 hv. The mass fraction of surface alloy layer of alloy elements is 15% 55%, and copper alloys, corrosion resistant performance improved substantially, and the aluminum alloy corrosion resistance was significantly enhanced.



laser cladding technology is what? It is the use of high energy density laser beam will have different component, the performance of the alloy and substrate surface melting fast, formed in the substrate surface and substrate has a totally different composition and properties of the alloy layer of rapid solidification process. The generated surface alloy layer of the substrate from corrosion medium, the corrosion performance of the material is decided by the alloy layer. Laser surface treatment of magnesium alloys due to harsh environmental conditions, such as do not need to vacuum the workpiece size limit is small, in recent years, with the constant improvement of laser cladding technology and its application in the corrosion resistance of magnesium alloy surface is more and more attention by researchers.



China laser equipment factory is a professional laser equipment manufacturer, has CMA1530C - star products GH - A fiber laser cutting machine, MUV5 - B - A laser marking machine, uv CMA2425C - GH - A high power laser cutting machine automobile airbag