YD224耐磨药芯焊丝；                                             规格；1.2-1.6-2.0-2.4-3.0-4.0，                                                            化学成分；C.   0.25-0.4，Cr    5-7，Mo  1-1.5，W  1-1.5，V  0.3-0.5，Ni  0.3-0.5，                                                                                硬度；50-55，                                                                                                     适用范围；钢厂轧辊，输送辊，支撑辊，输送带轮的耐磨堆焊，及矿山煤矿机械的耐磨堆焊，注意事项；焊前清理表面，预热200-300度，焊后热处理，