A process for annealing of a cold-rolled high manganese steel sheet

摘要

according to the invention has excellent cosmetic results, the high strength requirements of the steel plate and the steel plate with the panel used in Fe - Mn - Al - c and the surface of the soft plate in gao menggang and become the key method and annealing heat treatment on the formation of the uc0b0ud654uce35 is on the way a heat treatment furnace, and annealing atmosphere gas and the mixing ratio of the bell tower to properly control the oxide layer thickness, the surface of the steel plate 1, and the engineering u339b and easy oxidation layer can be ub0b4uc5d0 points on the oxide layer AIN precipitation water distribution point annealing heat treatment method, and the surface of the soft plate gao menggang and above the oxide layer to remove the appropriate method for the three, the purpose.this invention is so Fe - Mn - Al gao menggang and - c in the soft plate 500 - 1000 degrees with the annealing heat treatment to the atmosphere of nitrogen gas of 100% or more than 50% of the nitrogen gas and hydrogen gas furnace, the rest of the mixture gas atmosphere of the annealing to the above surface treatment and the cold in order to eliminate the gas layer 0.06 weight% aqueous solution of hydrochloric acid - 0.8%, hydrochloric acid aqueous solution temperature 15 - 50 degrees, the 30 - 90 seconds time is due to the characteristics of the manufacturing method of the soft plate gao menggang and the importance.