Modification of cold-work tool steel by combination of laser cladding and friction stir processing
- Nagaoka T. ,
- Watanabe H. ,
- Fukusumi M. ,
- et al
- Nagaoka T. ,
- Watanabe H. ,
- Fukusumi M. ,
- Kitamura Y. ,
- Mizuno T. ,
- Abe G. ,
- Morisada Y. and
- Fujii H.
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A combination of laser surfacing and friction stir processing (FSP) was employed to modify a cold-worked AISI D2 tool steel (1.5%C, 11%Cr, 0.83%Mo, 0.36%V) with the aim of clarifying the FSP conditions required to obtain a microstructure with uniformly dispersed fine carbide particles in the martensitic matrix. The laser surfacing equipment comprised a coaxial surfacing head, a diode laser system and a powder feeder. FSP was conducted at rotational speeds of 200-600 rpm, a fixed travel speed of 50 mm/min and a forging load of 33 kN. The microstructures and crystal phases of the deposited metal layers were observed by SEM and X-ray diffraction, respectively. Microhardness depth profiles were measured at the centre of the friction processed zone.
9th International Symposium, 15-17 May 2012, Session 5B: FSP, Paper 03
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