金属热处理 ›› 2026, Vol. 51 ›› Issue (2): 245-250.DOI: 10.13251/j.issn.0254-6051.2026.02.036

• 工艺研究 • 上一篇    下一篇

退火温度对新型铁素体不锈钢组织与性能的影响

王长波1, 李欢欢2,3, 保先恒2,3, 王建泽1, 惠洋4, 马金元2,3   

  1. 1.酒泉钢铁集团有限责任公司, 甘肃 嘉峪关 735100;
    2.兰州理工大学 材料科学与工程学院, 甘肃 兰州 730050;
    3.兰州理工大学 省部共建有色金属先进加工与再利用国家重点实验室, 甘肃 兰州 730050;
    4.嘉峪关科学技术局, 甘肃 嘉峪关 735100
  • 收稿日期:2025-09-21 修回日期:2025-12-17 发布日期:2026-03-05
  • 作者简介:王长波(1986—),男,工程师,学士,主要从事不锈钢新品研发工作,E-mail:Wangchangbo@jiugang.com
  • 基金资助:
    嘉峪关市科技计划(23-15)

Effect of annealing temperature on microstructure and mechanical properties of novel ferritic stainless steel

Wang Changbo1, Li Huanhuan2,3, Bao Xianheng2,3, Wang Jianze1, Hui Yang4, Ma Jinyuan2,3   

  1. 1. Jiuquan Iron and Steel Group Co., Ltd., Jiayuguan Gansu 735100, China;
    2. School of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou Gansu 730050, China;
    3. State Key Laboratory of Advanced Processing and Recycling of Non-Ferrous Metals, Lanzhou University of Technology, Lanzhou Gansu 730050, China;
    4. Jiayuguan Scientific and Technological Bureau, Jiayuguan Gansu 735100, China
  • Received:2025-09-21 Revised:2025-12-17 Published:2026-03-05

摘要: 通过真空感应熔炼制备了添加Mn和V元素的SUS410L-N新型铁素体不锈钢,系统探究了退火温度(720、820、890 ℃)对其相变特性、微观组织及拉伸性能的影响。结果表明,退火处理可显著降低残余应力和位错密度,晶粒尺寸随退火温度升高呈现先增后减的趋势,820 ℃退火时增至3.90 μm,而890 ℃退火时因γ→α相变诱导再结晶使晶粒细化至3.12 μm。820 ℃退火后形成约200 nm椭球形析出物,890 ℃退火时析出物尺寸减小至20~50 nm。随退火温度升高,强度由热轧态先降低随后升高,断裂总延伸率逐渐升高。890 ℃退火试样综合力学性能优异,这归因于高密度大角度晶界(HAGBs)、细晶组织以及纳米级析出物的协同作用,实现了强度与塑性的最佳匹配。

关键词: 铁素体不锈钢, 退火温度, 显微组织, 拉伸性能

Abstract: A novel Mn- and V-alloyed SUS410L-N ferritic stainless steel was prepared by vacuum induction melting, and effect of annealing temperature (720, 820, and 890 ℃) on phase transformation behavior, microstructure and tensile properties was systematically investigated. The results reveal that annealing treatment markedly reduces the residual stress and dislocation density. The grain size exhibits a non-monotonic evolution with increasing annealing temperature, increasing to 3.90 μm after annealing at 820 ℃, but decreasing to 3.12 μm after annealing at 890 ℃ due to γ→α transformation-induced recrystallization occurring during subsequent cooling. After annealing at 820 ℃, ellipsoidal precipitates with a size of about 200 nm are formed, whereas the size decreases to 20-50 nm at 890 ℃. With the increase of annealing temperature, the strength first decreases and then increases relative to the hot-rolled condition, while the total elongation at fracture increases continuously. The specimen annealed at 890 ℃ exhibits the best comprehensive mechanical properties, which is attributed to the synergistic effects of a high density of high-angle grain boundaries (HAGBs), a refined-grain microstructure, and nanoscale precipitates, thereby achieving an optimal strength-ductility balance.

Key words: ferritic stainless steel, annealing temperature, microstructure, tensile properties

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