调质处理对海洋工程用特厚钢板Nb、Ni合金化效果的影响

doi:10.13251/j.issn.0254-6051.2025.07.008

摘要/Abstract

摘要： 对有无Nb、Ni两种100 mm厚试验钢板进行调质处理,并对其组织和性能进行表征,研究调质处理对Nb、Ni合金化效果的影响。结果表明,两种试验钢轧态组织均由铁素体和珠光体组成,含Nb、Ni试验钢的晶粒细化,-60 ℃冲击性能良好,而无Nb、Ni钢冲击性能较差,且在1/4处冲击吸收能量出现波动,最小值仅为23 J。调质处理后,无Nb、Ni钢主要由准多边形铁素体、针状铁素体和贝氏体组成,含Nb、Ni钢则主要由准多边形铁素体和贝氏体组成,两种钢的强度和冲击性能均大幅提升,但无Nb、Ni钢强度沿厚度方向分布更加均匀,无Nb、Ni钢的冲击吸收能量与含Nb、Ni钢相当,均在200 J以上。

关键词: 特厚钢板, 调质处理, Nb、Ni合金化, 组织, 性能

Abstract: The quenching and tempering treatment was carried out on two 100 mm thickness tested steel plates with and without Nb and Ni additions, and the microstructure and properties were characterized to investigate the effect of quenching and tempering treatment on the alloying effect of Nb and Ni. The results show that the as-rolled microstructure of both steels consist of ferrite and pearlite. The steel with Nb and Ni additions exhibits grain refinement and good impact properties at －60 ℃. In contrast, the steel without Nb and Ni has poor impact properties, and the impact absorbed energy fluctuates at the 1/4 thickness position, with a minimum value of only 23 J. After quenching and tempering treatment, the steel without Nb and Ni is mainly composed of quasi-polygonal ferrite, acicular ferrite, and bainite, while the steel with Nb and Ni is primarily composed of quasi-polygonal ferrite and bainite. The strength and impact properties of both steels are significantly improved. However, the strength of the steel without Nb and Ni is more uniformly distributed along the thickness direction. The impact absorbed energy of the steel without Nb and Ni is comparable to that of the steel with Nb and Ni, both exceeding 200 J.

Key words: extra-thickness steel plate, quenching and tempering, Nb and Ni alloying, microstructure, properties

中图分类号:

TG156

李润杰, 曲锦波, 陆春洁, 叶其斌. 调质处理对海洋工程用特厚钢板Nb、Ni合金化效果的影响[J]. 金属热处理, 2025, 50(7): 54-60.

Li Runjie, Qu Jinbo, Lu Chunjie, Ye Qibin. Influence of quenching and tempering on Nb and Ni alloying effect of extra-thickness steel plate for offshore engineering[J]. Heat Treatment of Metals, 2025, 50(7): 54-60.

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