党恩,江慧敏,曹晓宇,阎永宏,蔡欣,惠海锋,王卫东,胡小强

• 1:宝鸡石油机械有限责任公司
• 2:中国科学院金属研究所

摘要(Abstract)：

在F22钢的成分基础上添加微量V、B及稀土等元素进行微合金化，形成了一种新型的超高压防喷器用F22M低合金钢。采用热膨胀仪、光学显微镜、扫描电镜、透射电镜、拉伸试验机和冲击试验机等研究了相同热处理条件下两种低碳合金钢(F22钢、F22M钢)力学性能和微观组织的变化规律。结果表明：经过930℃淬火处理，F22钢的组织为板条状贝氏体和少量粒状贝氏体，F22M钢的组织为板条状贝氏体、粒状贝氏体和少量淬火马氏体。随回火温度的升高，贝氏体铁素体板条发生回复，短棒状和长条状碳化物逐渐球化，F22和F22M钢的强度均下降，但后者的强度始终高于前者，F22M钢的冲击吸收能量呈上升的趋势。670℃回火后，F22M钢的屈服强度和抗拉强度分别为654和772 MPa,较F22钢分别提高了6.5%和6.9%,冲击吸收能量急剧上升，达到了310 J,硬度为231 HB,表明通过稀土综合微合金化的调控，F22M钢的强度、塑韧性及硬度可达到最佳匹配。

关键词(KeyWords)： 稀土;微合金化;超高压防喷器;微观组织;力学性能

Abstract:

Keywords:

基金项目(Foundation): 中国石油天然气集团有限公司关键核心技术攻关项目(2021ZG08);; 陕西省重点研发计划(2023-YBGY-431)

作者(Author): 党恩,江慧敏,曹晓宇,阎永宏,蔡欣,惠海锋,王卫东,胡小强

DOI: 10.13289/j.issn.1009-6264.2024-0038

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