Development of micro rotary swaging tools of graded tool steel via co-spray formingChengsong Cui, Alwin Schulz, Eric Moumi, Bernd Kuhfuss, Florian Böhmermann and Oltmann RiemerMATEC Web of Conferences, 21 (2015) 09017DOI: https://doi.org/10.1051/matecconf/20152109017