Method for producing a grain-oriented electrical steel sheet products intended for electrical engineering applications

摘要

A process for the production of a directional steel products intended for electrical engineering applications , and the strands are cast melt , separating the thin slabs from the cast strand , and heating the thin slab , the present invention , hot -rolled the hot strip Te , cooling the hot strip , wound up , and the cold strip is cold rolled , subjected to nitriding annealing and decarburization cold strip , coated with annealing separator on the surface of the cold strip , a cold strip a method for forming the Goss texture in the last annealing . And its process is performed in two stages , " nitriding annealing and decarburization " manufacturing process , the first stage of the annealing process Oyobi the first time interval , the target annealing temperature to a first heating the cold strip from the start temperature and a step of holding at the target annealing temperature , the second -step annealing process Oyobi the second time interval , heated to a target annealing temperature of the second cold strip in this time interval , at the target annealing temperature continued to hold . Target annealing temperature of the first 10~50 lower than the target annealing temperature of the second , the duration of the first time interval , 30 to 70 of the total duration of the annealing process including a first and second time intervals % it is . None [ Figure ] selection