Solid-solution-strengthening type heat-resisting alloy C-HRA-2 welding wire for argon arc welding

The invention discloses a solid-solution-strengthening type heat-resisting alloy C-HRA-2 welding wire for argon arc welding, and belongs to the technical field of heat-resisting alloy welding materials. The welding wire comprises the following components in percentage by weight: 0.06%-0.12% of C, less than 1.0% of Si, less than 1.0% of Mn, not greater than 0.015% of P, not greater than 0.001% of S, 20%-22% of Cr, 10%-13% of Co, 8.1%-8.8% of Mo, 0.1%-1.0% of W, not greater than 0.0025% of N, not greater than 0.0025% of O, and the balance of Ni and inevitable impurity elements. The welding wire has the following advantages: the heat crack resistance sensitivity is improved by 90%, the welding strain aging cracks of the alloy are fundamentally eliminated, excellent physical and mechanical properties matched with base metal, excellent impact toughness, excellent welding process performance, high weld metal fluidity, and high weld formability are achieved, and the production cost is 10%-15% lower than that of an e