热处理工艺对N06600合金热轧板组织与性能的影响

doi:10.13251/j.issn.0254-6051.2022.09.020

摘要/Abstract

摘要： 研究了热处理工艺对N06600合金热轧板组织与力学性能的影响。结果表明,N06600板材组织主要为奥氏体+沿晶界分布的网状碳化物+晶内碳化物。随着固溶温度的升高,碳化物含量逐渐减少,强度降低,当固溶温度升高至980 ℃,开始发生明显再结晶,同时部分晶粒已充分长大。当固溶温度继续升高至1020 ℃,组织再结晶完成,晶粒平均尺寸达到127 μm,碳化物全部固溶于基体中,强度大幅降低,伸长率显著增加,组织中出现了大量孪晶。N06600合金板材合金化程度低,碳化物含量较低,换向轧制制备的板材横纵向组织与性能差异较小,表现出了较低的各向异性,即使通过650 ℃+950 ℃和950 ℃+650 ℃二次固溶处理,或通过水淬加快冷却速度,组织与性能均保持良好的稳定性。

关键词: N06600合金板, 微观组织, 力学性能, 各向异性, 碳化物

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

中图分类号:

TG146.23

温方明, 郝晓博, 曹恒, 张强, 李渤渤, 刘茵琪. 热处理工艺对N06600合金热轧板组织与性能的影响[J]. 金属热处理, 2022, 47(9): 113-118.

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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