The work aims to introduce activating flux into the composite powder particles (CPPs) to change the arc behavior on CPPs and increase the content of alloying elements in hardfacing metals, so as to improve their abrasion resistance. Five groups of high chromium alloys were deposited by self-shielded open arc welding with filler materials such as CPPs and H08A solid wire. Then, the effects of different CaCO3 contents on the arc shape, arc stability, microstructure, and abrasion resistance of high-chromium hardfacing alloys were investigated in detail.