YD057埋弧無縫藥芯焊絲；                                                         規(guī)格1.2-1.6-2.0-2.4-3.0-4.0，                                                                                       化學成分；C   0.2-0.5,Cr  4.0-6.0，Mo  0.5-1.5，V  0.5-1.0其他≦6.0，                硬度；44-50，                                                                                                               適用范圍，熱扎輥，開坯輥支撐輥的堆焊，