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°C. In a LAT process for a square member, the maximum temperature is 1 850.8 °C. It is recognized that a laser power control process is required because square members show a maximum temperature that exceeds a melting temperature at around a vertex of the member according to the rotation. Key words: laser assisted machining; laser assisted turning; laser preheating; laser power control 1......
of AZ61 magnesium alloys is investigated using a special CO2 laser experimental system. The effect of processing parameters including laser power, welding speed,and protection gas flow at the top.... Among them, laser power and welding speed are the two main parameters that determine the weld width and dimensions. The protect gas flow rate has a slight effect on the weld width, but it directly effects......
corrosion resistance. Key words:Magnesium alloy; AI-Si alloy; Laser cladding; Laser power; [全文内容正在添加中] ...Influences of laser powers on microstructure and properties of the coatings on the AZ91HP magnesium alloy Dangsheng XIONG1,Yali GAO1,Yongzhe CHEN2,Cunshan WANG2 (1.School of Material Science......
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to its electric vector amplitude. A laser beam spreading along the z-direction is expressed as[10]: (1) where P is the laser power; w(z) is the spot radius at z cross... H. Phase change phenomena during high power laser-materials interaction [J]. Materials Science and Engineering A, 2000, 292(2): 162-168. [13] CORRERA L, BENTINI G.G. Thermal profiles and thermal......
the scanning speed is 3 500 mm/min and the laser power is 4.8 kW. With increase of the laser power, the amorphous phase in the coating increases when it is lower than 4.8 kW. A gradient distribution... sections. Firstly, the coatings were melted on the substrate. In this section, the fusion power was 2 kW and the scanning velocity was 300 mm/min, and the laser beam diameter was 3mm. Secondly......
Effect of laser power and deposition environment on the microstructure and properties of direct laser metal-deposited 12CrNi2 steelChangtai Chi22. Institute of Metal Research, Chinese Academy... laser power and deposition in Ar chamber will lead to a decrease in the quantity and size of the voids,which brings more elongation to the samples.Bainitic microstructure was replaced by Widmanstatten......
on the surface of micro-hotplate was presented. The tiny fiber probe and the optical power meter were employed to measure the sample radialization power. By means of comparing the relationship between the radialization power and the temperature, sample surface temperature can be discerned accurately. Such an approach has provided more accuracy than traditional temperature measurements. The experimental......
parameters include laser power of 14W, scanning velocity of 1400mm/s, preheating temperature of 50℃ and powder depth of 0.15mm. A two-step post-treatment process is adopted to improve the mechanical...×500mm Prototype precision: ±0.2mm Laser: 100W synrad CO2 laser Laser beam width: 0.20mm Laser beam length: 0.20-50mm Laser scanning velocity: <5m/s Laser power, laser scanning velocity, powder depth......
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