Continuous annealing process of 430 stainless steel

doi:10.13251/j.issn.0254-6051.2024.08.021

Abstract

Abstract: Annealing of 430 stainless steel hot rolled plate is generally carried out in the bell-type furnace, which has a long production cycle and seriously restricts the improvement of production capacity. Experimental research was conducted on the continuous annealing process of the 430 stainless steel hot rolled plates through optimization of chemical composition and annealing process. The results show that under laboratory conditions, the optimal heat treatment process of the 430 stainless steel is annealing at 880 ℃ and holding for 240 s. Austenite transformation occurs when annealed at 910 ℃. Based on the actual production conditions, the heat treatment temperature range for the annealing and pickling production line can be set to (880 ± 5) ℃. The strip structure of the hot rolled 430 stainless steel cannot be completely eliminated after continuous annealing. After cold rolling, finishing annealing and pickling, the elongation of the tested steel reaches over 26%, which can meet the usage needs of the shallow stamping industry.

Key words: continuous annealing, 430 stainless steel, microstructure, properties

CLC Number:

TG142.71

Yang Yongchao, Li Yugui, Zhao Zijun. Continuous annealing process of 430 stainless steel[J]. Heat Treatment of Metals, 2024, 49(8): 130-135.

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