Effect of Atmosphere and Holding Time on the Quality of Surface and Mechanical Properties of the Cold-Rolling Plate of Fe-42% Ni (4J42)

Abstract:

In order to guide atmosphere annealing process in industry, the effect of atmosphere and holding times on the surface quality and mechanical properties of the cold-rolling plate of Fe-42% Ni (4J42) was studied. It is found that in the laboratory, surface qualities of all the samples annealed at different annealing condition are all good enough. When the ratio of hydrogen and nitrogen is below 70%:30%, at different holding time, with increasing of H₂ proportion, 4J42’s tensile strength and yield strength all increases, and the hardness declines. And except H₂:N₂=70%:30, when holding time is less than or equal to 1.2min, at different ratio of hydrogen and nitrogen, holding time will influence 4J42’s mechanical properties little. So combine requires in industry with the experiment results, it can be concluded that for 4J42 alloy, annealing at atmosphere of hydrogen nitrogen ratio is less than 70%:30% for about 1.2min is appropriate to atmosphere annealing process in industry.

• Periodical: Advanced Materials Research (Volumes 560-561)
• Pages: 655-660
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.560-561.655
• Online since: August 2012
• Authors: Li Juan Li, Li Hua Liu, Jing Wang
• Keywords: Atmosphere Annealing , Fe-42% Ni (4J42), Mechanical Property, Surface Quality

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