1 23 Arabian Journal for Science and Engineering ISSN 1319-8025 Arab J Sci Eng DOI 10.1007/s13369-013-0599-9 Microstructural Development of Fe–Cr–C and B 4 C Powder Alloy Coating on Stainless Steel by Plasma-Transferred Arc Weld Surfacing Soner Buytoz, Ayhan Orhan, Ali Kaya Gur & Ugur Caligulu