Development of micro rotary swaging tools of graded tool steel via co-spray formingChengsong Cui, Alwin Schulz, Matthias Steinbacher, Eric Moumi, Bernd Kuhfuss, Florian Böhmermann and Oltmann RiemerManufacturing Rev., 2 (2015) 22DOI: https://doi.org/10.1051/mfreview/2015024