1.酒钢集团宏兴钢铁股份有限公司钢铁研究院不锈钢研究所,嘉峪关 735100
2.酒钢集团宏兴钢铁股份有限公司不锈钢分公司,嘉峪关 735100
赵得江(1983—),男,硕士,高级工程师;E-mail:zhaodejiang@jiugang.com
潘吉祥(1968—),男,硕士,正高级工程师;E-mail:panjixiang@jiugang.com
收稿:2024-10-10,
纸质出版:2025-05-30
移动端阅览
赵得江,潘吉祥,胡桓彰等.基于Thermo-Calc计算的316H奥氏体不锈钢凝固特性与铁素体分布特性[J].特殊钢,2025,46(03):28-33.
Zhao Dejiang,Pan Jixiang,Hu Huanzhang,et al.Solidification Properties and Ferrite Distribution Characteristics of 316H Austenitic Stainless Steel Calculated Based on Thermo-Calc[J].Special Steel,2025,46(03):28-33.
赵得江,潘吉祥,胡桓彰等.基于Thermo-Calc计算的316H奥氏体不锈钢凝固特性与铁素体分布特性[J].特殊钢,2025,46(03):28-33. DOI: 10.20057/j.1003-8620.2024-00245.
Zhao Dejiang,Pan Jixiang,Hu Huanzhang,et al.Solidification Properties and Ferrite Distribution Characteristics of 316H Austenitic Stainless Steel Calculated Based on Thermo-Calc[J].Special Steel,2025,46(03):28-33. DOI: 10.20057/j.1003-8620.2024-00245.
通过Thermo-Calc软件的模拟计算,寻求优化316H奥氏体不锈钢板坯的均匀化工艺,以降低最终产品中的高温铁素体含量。采用平衡和非平衡凝固路径模拟,结合实际铸坯样品的金相组织分析,确定了最佳的均匀化热处理参数,从而有效减少铁素体含量。优化前铸坯均匀化热处理温度为1 250 ℃,保温时间1 000 min,最终成品铁素体含量为3%~4%。通过改进均匀化工艺,将工艺调整为两阶段处理,第一阶段在1 250 ℃下保温250 min,第二阶段在1 180 ℃保温250 min。优化后的工艺将成品铁素体含量降低至1%以下,同时,显著改善了材料的显微组织。工艺优化后,成品的室温拉伸强度和冲击韧性均满足材料标准要求。此外,实验结果表明,调整均匀化温度和保温时间可有效促进铁素体向奥氏体的转变,并减少固溶体内偏析现象。
This study aims to optimize the homogenization process of 316H austenitic stainless steel slabs through simulation calculations using the Thermo-Calc software, with the goal of reducing the high-temperature ferrite content in the final product. The equilibrium and non-equilibrium solidification path simulations were conducted, in combination with metallographic analysis of actual cast slab samples, to determine the optimal homogenization heat treatment parameters, thus effectively reducing the ferrite content.Prior to optimization, the slab was homogenized at 1 250 ℃ for 1 000 minutes, resulting in a final product ferrite content of 3% to 4%. Through improvements to the homogenization process, the process was adjusted to two stages,: the first stage involved holding at 1 250 ℃ for 250 minutes, followed by the second stage at 1 180 ℃ for 250 minutes. The optimized process reduced the ferrite content in the finished product to below 1%, while significantly improving the material's microstructure. After the process optimization, the tensile strength and impact toughness of the finished product at room temperature met the material standard requirements. Moreover, the experimental results indicate that adjusting the homogenization temperature and holding time effectively promotes the transformation of ferrite to austenite and reduces the segregation within the solid solution.
Whittaker M T , Evans M , Wilshire B . Long-term creep data prediction for type 316H stainless steel [J]. Materials Science and Engineering: A , 2012 , 552 : 145 - 150 .
Xu Y T , Zhang B , Wei X X , et al . Improving pitting resistance of Mo-containing stainless steels via chloride-assisted stabilization of the passive film [J]. Corrosion , 2024 , 227 : 111787 .
Dai Y N , Zheng X T , Ding P S . Review on sodium corrosion evolution of nuclear-grade 316 stainless steel for sodium-cooled fast reactor applications [J]. Nuclear Engineering and Technology , 2021 , 53 ( 11 ): 3474 - 3490 .
Zhang Y B , Zou D N , Wang X Q , et al . Influence of cooling rate on δ-ferrite/γ-austenite formation and precipitation behavior of 18Cr-Al-Si ferritic heat-resistant stainless steel [J]. Journal of Materials Research and Technology , 2022 , 18 : 1855 - 1864 .
Valiente Bermejo M A , Wessman S . Computational thermodynamics in ferrite content prediction of austenitic stainless steel weldments [J]. Welding in the World , 2019 , 63 ( 3 ): 627 - 635 .
李建民 , 庄迎 , 尹嵬 . 316 h不锈钢铁素体的形成与控制 [J/OL]. 钢铁 , 2022 , 57 ( 11 ): 123 - 130 .
胡昕明 , 张海明 , 隋松言 , 等 . 模拟焊后热处理对316 H钢组织和性能的影响 [J]. 压力容器 , 2022 , 39 ( 3 ): 34 - 39 .
李 骥 , 何西扣 , 许 斌 , 等 . Si含量对316H钢耐铅铋腐蚀性能的影响 [J]. 中国冶金 , 2022 , 32 ( 4 ): 54 - 62 .
Yang Y , Busby J T . Thermodynamic modeling and kinetics simulation of precipitate phases in AISI 316 stainless steels [J]. Journal of Nuclear Materials , 2014 , 448 ( 1-3 ): 282 - 293 .
荆雪 , 辛光瀚 , 耿鑫 , 等 . 渐进式固溶处理对316H不锈钢组织及性能的影响 . 特殊钢 , 2025 , 46 ( 1 ): 99 - 105 .
Hao Y S , Cao G M , Li C G , et al . Solidification structures of Fe-Cr-Ni-Mo-N super-austenitic stainless steel processed by twin-roll strip casting and ingot casting and their segregation evolution behaviors [J ] . ISIJ International , 2018 , 58 ( 10 ): 1801 - 1810 .
Ferrandini P L , Rios C T , Dutra A T , et al . Solute segregation and microstructure of directionally solidified austenitic stainless steel [J]. Materials Science and Engineering: A , 2006 , 435-436 : 139 - 144 .
刘益虎 , 吴永全 , 沈 通 , 等 . 连续升温过程中γ-Fe→δ-Fe→液态Fe相变的分子动力学模拟 [J]. 金属学报 , 2010 , 46 ( 2 ): 172 - 178 .
Hao K D , Gao M , Wu R . Cold rolling performance for austenitic stainless steel with equilibrium and non-equilibrium microstructures [J]. Journal of Materials Research and Technology , 2020 , 9 ( 1 ): 124 - 132 .
Salehi M , Eskandari M , Yeganeh M . Characterizations of the microstructure and texture of 321 austenitic stainless steel after cryo-rolling and annealing treatments [J]. Journal of Materials Engineering and Performance , 2022 , 32 : 816 - 834 .
Li Y N , Zou D N , Chen W W , et al . Effect of cooling rate on solidification and segregation characteristics of 904 L super austenitic stainless steel [J]. Metals and Materials International , 2022 , 28 ( 8 ): 1907 - 1918 .
0
浏览量
1
下载量
0
CSCD
0
CNKI被引量
关联资源
相关文章
相关作者
相关机构
京公网安备11010802024621