Effect of heat treatment process on microstructure and mechanical properties of N06600 alloy hot rolled plate

doi:10.13251/j.issn.0254-6051.2022.09.020

Abstract

Abstract: Effect of heat treatment process on microstructure and mechanical properties of N06600 alloy hot rolled plate was studied. The results indicate that the N06600 alloy plate is composed of austenite+carbides along the grain boundary+carbides in grain. The content of carbides and the strength decrease with the increasing of solution treatment temperature. Obvious recrystallization occurs and some grains grow up significantly after solution treatment at 980 ℃. When the solution treatment temperature rises to 1020 ℃, the recrystallization is finished and the average grain size increases up to 127 μm, and all the carbides are dissolved in matrix. At the same time, the strength decreases drastically and the elongation increases greatly, and a large amount of twins are found in the microstructure. For the low alloying and carbide content, the difference between the transverse and longitudinal directions on the microstructure and mechanical properties of the N06600 alloy plate produced by alternative rolling process is small and the anisotropy of mechanical properties is not significant, and even with a double solution treatment at 650 ℃+950 ℃ or 950 ℃+650 ℃, or water quenching for raising cooling rate, the microstructure and mechanical properties still remain stable.

Key words: N06600 alloy plate, microstructure, mechanical properties, anisotropy, carbides

CLC Number:

TG146.23

Wen Fangming, Hao Xiaobo, Cao Heng, Zhang Qiang, Li Bobo, Liu Yinqi. Effect of heat treatment process on microstructure and mechanical properties of N06600 alloy hot rolled plate[J]. Heat Treatment of Metals, 2022, 47(9): 113-118.

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