孙玉崇 刘志敏 徐振 田双永 田爽. Zr含量对Al-Mg-Si-0.4Mn铸轧铝合金薄板再结晶行为和力学性能的影响研究[J]. 金属学报, 10.11900/0412.1961.2024.00102.

摘要 相关文章 Metrics 全文: PDF(1775 KB)   摘要: 在铝合金铸轧成型过程中，通过促进或抑制粒子刺激形核(PSN)效应调控铝合金再结晶行为，改善铝合金的组织结构，是生产高质量铸轧板的技术关键和难点。本文制备了6种不同Zr含量的Al-Mg-Si铸轧薄板，旨在从PSN角度揭示Zr含量对Al-Mg-Si铸轧薄板再结晶行为和力学性能的影响机理。研究结果表明，随着Zr含量的增加，晶粒尺寸呈先增大后减小再增大的变化趋势。Zr元素可与Al元素结合形成L12结构的纳米级Al3Zr析出相，抑制铸轧板PSN再结晶行为，促使晶粒纤维化。当Zr添加量为0.4% (质量分数，下同)时，晶粒纤维化程度最大；当Zr含量为0.6%时，Zr元素对晶粒再结晶的抑制作用减弱，微观组织中出现粗大D023结构的Al3Zr初生相，加剧了铸轧板的再结晶程度，再结晶晶粒明显长大。此外，随着铸轧板中Zr含量的增加，组织中富Fe相的尺寸、体积分数以及铸轧板的强度均呈先增大后减小再增大的变化趋势。当Zr含量为0.3%时,铸轧板的综合力学性能较佳，此时拉伸断口呈现韧性断裂特征，铸轧板中富Fe相分布弥散，体积分数约为1.95%，板材的抗拉强度、屈服强度和延伸率分别为226.91 MPa、104.81 MPa、15.05%。 关键词 ： Zr,  微合金化,  双辊铸轧,  再结晶     Abstract： Twin roll casting is a short-process, high-energy-efficiency method for producing aluminum alloy sheets. During the forming process of cast-rolled aluminum alloy sheets, defects such as segregation, coarse second phases, and poor structural properties may occur owing to the quenching effect of the rolling mill rolls. Microalloying can effectively mitigate these defects and enhance the mechanical properties of aluminum alloy sheets produced by cast rolling. In the aluminum alloy twin roll casting process, regulating the recrystallization behavior and improving the microstructure by promoting or suppressing the particle-stimulated nucleation (PSN) effect is critical for producing high-quality cast-rolled sheets. This study prepared six Al–Mg–Si cast-rolled aluminum alloy sheets with varying Zr contents to investigate the evolution of their microstructure and properties, aiming to reveal the influence of Zr content on the recrystallization behavior and mechanical properties of Al–Mg–Si cast-rolled aluminum alloy sheets from the perspective of PSN. The results demonstrated that as the Zr content increased, the grain size initially increased, subsequently decreased, and then increased again. The Zr element was observed to combine with Al to form nano-sized Al3Zr precipitates with an L12 structure. These precipitates effectively inhibited the recrystallization behavior associated with PSN in cast-rolled sheets and promoted grain fibrosis. Specifically, when the Zr content was 0.4% (by weight, as referred to hereafter), the degree of grain fibrosis reached its maximum; however, with a Zr content of 0.6%, the inhibitory effect of Zr on grain recrystallization was reduced. At this concentration, the coarse D023-structured Al3Zr primary phase emerged, exacerbating the PSN effect and increasing the degree of recrystallization in the cast-rolled sheet. Furthermore, as the Zr content increased in the cast-rolled sheet, both the volume fraction of the Fe-rich phase in the microstructure and the tensile strength exhibited a trend of first increasing, then decreasing, and subsequently increasing again. Notably, when the Zr content was 0.3%, the comprehensive mechanical properties of the cast-rolled sheet were optimal. The tensile fracture surface exhibited ductile fracture characteristics, and the Fe-rich phase distribution in the sheet was dispersed, with a volume fraction of approximately 1.95%. The tensile strength, yield strength, and elongation were measured to be 226.91 MPa, 104.81 MPa, and 15.05%, respectively. Key words： Zr    Microalloying    Twin roll casting    recrystallization 收稿日期: 2024-04-08      ZTFLH:  TG292   基金资助:国家自然科学基金 服务 把本文推荐给朋友 加入引用管理器 E-mail Alert RSS 作者相关文章 孙玉崇 刘志敏 徐振 田双永 田爽 44.8K 链接本文: https://www.ams.org.cn/CN/Y0/V/I/0 [1] 彭子超, 罗俊鹏, 赵宇, 周磊, 王旭青, 邹金文. FGH96合金静态再结晶过程的显微组织演化[J]. 金属学报, 2025, 61(2): 235-242. [2] 刘光辉, 王卫国, Rohrer Gregory S, 陈松, 林燕, 童芳, 冯小铮, 周邦新. 高温压缩变形Al-Zn-Mg-Cu合金动态再结晶后的{111}/{111}近奇异晶界[J]. 金属学报, 2024, 60(9): 1165-1178. [3] 杨瑞泽, 翟汝宗, 任少飞, 孙明月, 徐斌, 乔岩欣, 杨兰兰. 1Cr22Mn16N高氮奥氏体不锈钢塑性变形连接中界面组织演化及愈合机制[J]. 金属学报, 2024, 60(7): 915-925. [4] 孟子凯, 孟智超, 高长源, 郭辉, 陈汉森, 陈刘涛, 徐东生, 杨锐. 不同条件下纳米晶 α-Zr蠕变行为的分子动力学模拟[J]. 金属学报, 2024, 60(5): 699-712. [5] 江浩文, 彭伟, 范增为, 汪杨鑫, 刘腾轼, 董瀚. Ag对奥氏体不锈钢组织和力学性能的影响[J]. 金属学报, 2024, 60(4): 434-442. [6] 田滕, 查敏, 殷皓亮, 花珍铭, 贾海龙, 王慧远. 低温高应变量衬板控轧高固溶Al-Mg合金高强塑性与高热稳定性机制[J]. 金属学报, 2024, 60(4): 473-484. [7] 陈胜虎, 王琪玉, 姜海昌, 戎利建. δ-铁素体对钠冷快堆用316KD奥氏体不锈钢热变形行为和动态再结晶的影响[J]. 金属学报, 2024, 60(3): 367-376. [8] 李龙健, 李仁庚, 张家郡, 曹兴豪, 康慧君, 王同敏. 低温轧制对高强高导Cu-1Cr-0.2Zr-0.25Nb合金性能及析出行为的影响[J]. 金属学报, 2024, 60(3): 405-416. [9] 胡宝佳, 郑沁园, 路轶, 贾春妮, 梁田, 郑成武, 李殿中. 冷轧中锰钢的再结晶调控及其对力学性能的影响[J]. 金属学报, 2024, 60(2): 189-200. [10] 刘勇, 曾刚, 刘洪, 王煜, 李建龙. 含Zr镁合金晶粒细化机理与研究进展[J]. 金属学报, 2024, 60(2): 129-142. [11] 介子奇, 刘鼎元, $\boxed{\hbox{张军}}$. B、Zr复合添加对IN718高温合金流动性的影响[J]. 金属学报, 2024, 60(12): 1615-1621. [12] 翟欣雅, 和正华, 沙玉辉, 朱晓飞, 李锋, 陈立佳, 左良. 巨磁致伸缩Fe-Ga合金薄带的抑制剂与二次再结晶行为[J]. 金属学报, 2024, 60(11): 1559-1570. [13] 郑雄, 赖玉香, 向雪梅, 陈江华. 稀土元素La对AlMgSi合金性能和微结构的影响[J]. 金属学报, 2024, 60(1): 107-116. [14] 赵鹏, 谢光, 段慧超, 张健, 杜奎. 两种高代次镍基单晶高温合金热机械疲劳中的再结晶行为[J]. 金属学报, 2023, 59(9): 1221-1229. [15] 李景仁, 谢东升, 张栋栋, 谢红波, 潘虎成, 任玉平, 秦高梧. 新型低合金化高强Mg-0.2Ce-0.2Ca合金挤压过程中的组织演变机理[J]. 金属学报, 2023, 59(8): 1087-1096. Viewed Full text Abstract Cited   Shared      Discussed