Laser surface alloying of a chromium-molybdenum steel: mechanical behaviour improvement by melting of boron coatings

2002 ◽  
Vol 99 (2) ◽  
pp. 135-144
Author(s):  
F. Marasescu ◽  
F. Hlawka ◽  
A. Cornet
Keyword(s):  
Mechanical Behaviour ◽  
Laser Surface ◽  
Surface Alloying ◽  
Laser Surface Alloying ◽  
Molybdenum Steel

Microstructures of Laser Processed Fe-Cr Surface Alloys

1981 ◽  
Vol 39 ◽  
pp. 328-329
Author(s):  
P. A. Molian ◽  
K. H. Khan ◽  
W. E. Wood
Keyword(s):  
Cooling Rate ◽  
Pure Iron ◽  
Continuous Wave ◽  
Laser Surface ◽  
Material Surface ◽  
Constitution Diagram ◽  
Incident Power ◽  
Surface Alloying ◽  
Laser Surface Alloying ◽  
Spot Diameter

In recent years, the effects of chromium on the transformation characteristics of pure iron and the structures produced thereby have been extensively studied as a function of cooling rate. In this paper, we present TEM observations made on specimens of Fe-10% Cr and Fe-20% Cr alloys produced through laser surface alloying process with an estimated cooling rate of 8.8 x 104°C/sec. These two chromium levels were selected in order to study their phase transformation characteristics which are dissimilar in the two cases as predicted by the constitution diagram. Pure iron (C<0.01%, Si<0.01%, Mn<0.01%, S=0.003%, P=0.008%) was electrodeposited with chromium to the thicknesses of 40 and 70μm and then vacuum degassed at 400°F to remove the hydrogen formed during electroplating. Laser surface alloying of chromium into the iron substrate was then performed employing a continuous wave CO2 laser operated at an incident power of 1200 watts. The laser beam, defocussed to a spot diameter of 0.25mm, scanned the material surface at a rate of 30mm/sec, (70 ipm).

Laser surface alloying of Al and AlSi10Mg with Ti and Ni

1998 ◽  
Author(s):  
N. Pirch ◽  
G. Backes ◽  
E. W. Kreutz ◽  
X. He ◽  
A. Weisheit ◽  
...  
Keyword(s):  
Laser Surface ◽  
Surface Alloying ◽  
Laser Surface Alloying

Effects of laser surface alloying with Cr on microstructure and hardness of commercial purity Zr

2019 ◽  
Vol 784 ◽  
pp. 1106-1112 ◽  
Author(s):  
Ke Chen ◽  
Lingguo Zeng ◽  
Zhijun Li ◽  
Linjiang Chai ◽  
Yueyuan Wang ◽  
...  
Keyword(s):  
Laser Surface ◽  
Commercial Purity ◽  
Surface Alloying ◽  
Laser Surface Alloying
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