Welding rod matched with steel for 3Ni-1.6 Cr-0. 5Mo nuclear power equipment and preparation method of welding rod

[0018] Example 1, a high-alkalinity and low-hydrogen coating of this embodiment, the solid component and the liquid component in the coating are mixed, and the added weight of the liquid component is 20% of the weight of the solid component. %; The solid component comprises the following components in parts by weight: CaC0 45 parts of CaF 20 parts of TiO 7 parts of Na2CO 1 part of CaSiO 6 parts of MgO 3 parts of TiFe 6 parts of SiFe 2 parts of metal Ni powder 6 parts of metal Cr powder 4 parts ; The low alloy steel welding core used, the weight percentage of chemical composition measured by chemical analysis method: C 0.12%, Si 0.20%, Mn 1.8%, P0.008%, S0.003%, Cr1.6%, Ni 3.0%, Mo0.5%, Cu 0.01%, Co0.002%, B≤0.0005%, Nb≤0.01%, As 0.004%, Sn 0.003%, and the balance is Fe. The liquid component used is potassium sodium 1:1 water glass with 46Be at 20°C.

[0019] After mixing the raw materials of the coating above evenly, sieve it with a 40-mesh sieve to 100% below 40 mesh, stir the

[0027] A high-alkalinity and low-hydrogen coating in this embodiment is formed by mixing solid components and liquid components in the coating, and the added weight of the liquid component is 22% of the weight of the solid component; Said solid components include the following components in parts by weight: CaCO 47 parts of CaF 23 parts of TiO 7 parts of NaCO 1 part of CaSiO 4 parts of MgO 3 parts of TiFe 7 parts of SiFe 2 parts of metal Ni powder 5 parts of metal Cr powder 4 parts; Low-alloy steel welding core, the weight percentage of chemical composition measured by chemical analysis method: C 0.13%, Si 0.19%, Mn 1.6%, P0.006%, S0.003%, Cr1.75%, Ni 3.2%, Mo0. 5%, Cu 0.01%, Co 0.001%, B≤0.0005%, Nb≤0.01%, As 0.003%, Sn 0.003%, and the balance is Fe. The liquid component used is potassium sodium 1:1 water glass with 46Be at 20°C

[0028] After mixing the raw materials of the coating above evenly, sieve through a 40-mesh sieve to 100% below 40 mesh, stir the dry powder evenly, a

[0036] A high-alkalinity and low-hydrogen coating in this embodiment is formed by mixing solid components and liquid components in the coating, and the added weight of the liquid component is 23% of the weight of the solid component; Said solid components include the following components in parts by weight: CaCO 48 parts of CaF 24 parts of TiO 8 parts of NaCO 1 part of CaSiO 5 parts of MgO 2 parts of TiFe 10 parts of SiFe 1 part of metal Ni powder 4 parts of metal Cr powder 3 parts; Low-alloy steel welding core, the weight percentage of chemical composition measured by chemical analysis method: C 0.13%, Si 0.19%, Mn 1.6%, P0.006%, S0.003%, Cr1.75%, Ni 3.2%, Mo0. 5%, Cu 0.01%, Co 0.001%, B≤0.0005%, Nb≤0.01%, As 0.003%, Sn 0.003%, and the balance is Fe. The liquid component used is potassium sodium 1:1 water glass with 46Be at 20°C.

[0037] After mixing the raw materials of the coating above evenly, sieve through a 40-mesh sieve to 100% below 40 mesh, stir the dry powder evenly,