iB2强化高硬度高耐磨堆焊 自保护药芯焊丝

In this paper，adding TiB2 with different content in the Fe-Cr-C flux-cored wire，new self-shielded cored wire for hardfacing with high hardness and abrasion resistance reinforced by TiB2 were produced. The microstructure of hardfacing alloys and effects of TiB2 in flux-cored wire on properties were investigated by means of a optical microscope(OM), scanning electron microanalysis(SEM), X-ray diffractometer(XRD). The results showed that hardfacing alloys microstructure consists of primary carbides, martensite and retained austenite，moreover lots of TiC-TiB2 particles can be synthesized via metallurgy reaction during arc welding melting process，and which dispersed in the primary carbides and matrix. Hardfacing alloys reinforced by TiB2 has a higher hardness and better wear resistance than that of without TiB2.