Patent ID: 11946113
Assignee: NIPPON STEEL CORPORATION
Field: Materials, metallurgy (Chemistry)
Classification: CPC C  H | IPC C

Claim 7:
8. The method for producing the grain oriented electrical steel sheet according to claim 1,
wherein, in the decarburization annealing process,
PH2O/PH2 which is an oxidation degree of an atmosphere is 0.18 to 0.80, an annealing temperature is 750 to 900° C., and a holding is 10 to 600 seconds, and
a nitriding treatment is conducted by annealing the cold rolled steel sheet in a cooling stage after decarburization annealing in an atmosphere where an ammonia is included and an oxidation degree PH2O/PH2 is 0.0001 to 0.01.