The invention relates to a manual
electric arc welding welding rod used for ultralow-temperature high
manganese steel. According to the technical scheme, the manual
electric arc welding welding rod is composed of a welding rod core and a
coating; the welding rod core comprises the following chemical components of 0.75-0.95 wt% of C; 26-30 wt% of Mn; 4.5-6.5 wt% of Ni; 1.5-3.5 wt% of Cr; 3.5-5.5 wt% of Al; P less than or equal to 0.002 wt%; S less than or equal to 0.002 wt%; and the balance Fe and inevitable impurities, the
coating comprises the following chemical components of 40-45 wt% of
fluorite; 15-20 wt% of marble; 4-10 wt% of
rutile; 3-6 wt% of
zircon sand; 1-2 wt% of
sodium carbonate; and the balance Fe
powder; and a preparation method of the manual
electric arc welding welding rod comprises the following steps of blending according to the chemical components of the
coating, mixing, adding a binder, uniformly stirring, and pressing and coating on the surface of the welding rod core to prepare the manual electric
arc welding welding rod used for the ultralow-temperature high
manganese steel. The manual electric
arc welding welding rod used for the ultralow-temperature high
manganese steel is low in cost and simple in
alloy system; and formed
weld metal has the characteristics of ultralow temperature and high
toughness, and the strength is matched with the strength of the ultralow-temperature high manganese steel.