孙友义,王振,陈邦敏,秦庆冬,田宇,潘涛,师仲然

• 1:中海油研究总院有限责任公司工程研究设计院
• 2:湖南华菱湘潭钢铁有限公司技术中心
• 3:钢铁研究总院有限公司工程用钢研究院

摘要(Abstract)：

研究了热-机械精轧工艺中的精轧压下量对低碳低合金钢组织、室温强韧性及韧脆转变温度的影响。结果表明：不同精轧压下量试验钢的显微组织主要由铁素体和少量的珠光体组成；精轧压下量从40%提高至61%,试验钢的冲击吸收能量增大，-100℃的冲击吸收能量从97 J升高至194 J,韧脆转变温度从-97℃降低至-104℃;冲击吸收能量的增加以及韧脆转变温度的降低，主要与精轧压下量从40%提高至61%时铁素体晶粒尺寸减小(铁素体晶粒尺寸从6.2μm细化至5.8μm)和大角度晶界比例增加有关；随着压下量增加，试验钢的韧性表现出先升高后趋于稳定的非线性增长特点；试验钢的精轧压下量控制在60%～70%范围内最佳。

关键词(KeyWords)： 精轧压下量;低温韧性;铁素体;晶粒细化

Abstract:

Keywords:

基金项目(Foundation): 中国海洋石油有限公司科技课题(KJZH-2024-2401)

作者(Author): 孙友义,王振,陈邦敏,秦庆冬,田宇,潘涛,师仲然

DOI: 10.13289/j.issn.1009-6264.2025-0301

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