[1]王立亚,杨柳,郑友平,等.轧制温度对TC4ELI宽厚板厚度方向组织与性能的影响[J].中国材料进展,2025,44(06):516-522.[doi:10.7502/j.issn.1674-3962.202501009]
　WANG Liya,YANG Liu,ZHENG Youping,et al.The Influence of the Rolling Temperature on Through-Thickness Microstructures and Properties of TC4ELI Wide-Thick Plates[J].MATERIALS CHINA,2025,44(06):516-522.[doi:10.7502/j.issn.1674-3962.202501009]
点击复制

轧制温度对TC4ELI宽厚板厚度方向组织与性能的影响()

中国材料进展[ISSN:1674-3962/CN:61-1473/TG]

卷:
44
期数:
2025年06
页码:
516-522
栏目:
出版日期:
2025-06-30

文章信息/Info

Title:
The Influence of the Rolling Temperature on Through-Thickness Microstructures and Properties of TC4ELI Wide-Thick Plates
文章编号:
1674-3962(2025)06-0516-07
作者:
王立亚; 杨柳; 郑友平; 康琴; 吴静怡; 钟勇
1. 成都先进金属材料产业技术研究院股份有限公司，四川 成都 610399 2. 钒钛资源综合利用国家重点实验室，四川 攀枝花 617099
Author(s):
WANG Liya;  YANG Liu ;  ZHENG Youping;  KANG Qin ;  WU Jingyi;  ZHONG Yong
1.Chengdu Advanced Metal Materials Industrial Technology Research Institute Co.,Chengdu 610399,China 2.State Key Laboratory of Vanadium and Titanium Resources Comprehensive Utilization, Panzhihua 617099,China
关键词:
TC4ELI合金; 宽厚板; 轧制温度; 显微组织; 力学性能; 厚度方向
Keywords:
TC4ELI alloy;  wide-thick plates;  rolling temperature;  microstructure; mechanical properties;  through-thickness
分类号:
TG146.23；TG335
DOI:
10.7502/j.issn.1674-3962.202501009
文献标志码:
A
摘要:
分别采用1050和900 ℃两种轧制温度制备出厚度为40 mm、宽度为~3700 mm的舰船用TC4ELI钛合金宽厚板，通过室温拉伸试验、夏比冲击试验、金相分析、电子背散射衍射分析等研究了轧制温度对该钛合金宽厚板沿厚度方向微观组织与力学性能分布特征的影响规律。结果表明，1050 ℃轧制的TC4ELI板材不同厚度层显微组织和力学性能差异较大，表层为由等轴α相+片层α相+残余β相组成的片层组织，强度和塑性高，冲击功较低；1/4厚度和1/2厚度区域为由片层α相+残余β相组成的片层组织，强度和塑性低，冲击功较高。900 ℃轧制的TC4ELI板材不同厚度层显微组织差别较小，均为双态组织，表层区域初生α和次生α相的晶粒尺寸较小、心部区域晶粒尺寸较大。由于TC4ELI钛合金板材的强化机制以细晶强化为主导，与1050 ℃轧制的板材相比，900 ℃轧制的板材强度和塑性均较高，而冲击功较低。总之，两相区轧制比单相区轧制更有助于微观组织结构优化，可有效提升板材沿厚度方向微观组织和力学性能的均匀性。
Abstract:
TC4ELI titanium alloy plates using for warships were rolled at 1050 and 900 ℃, respectively. The plates had a thicknesses of 40 mm and a width of about 3700 mm. The influence of rolling temperatures on the distribution characteristics of the microstructures and mechanical properties along the normal direction has been researched. Room temperature tensile tests, Charpy impact tests,metallographic analysis and electron backscatter diffraction analysis has been conducted. When rolled at 1050 ℃, there were significant differences in the microstructures and mechanical properties among different thickness areas. The surface areas had lamellar structures consisting of equiaxed α，lamellar α and residual β phases, with higher strength and plasticity but relatively lower impact toughness. The 1/4 thickness and 1/2 thickness areas had lamellar microstructure consisting of lamellar α and residual β phases and conversely had lower tensile strength and plasticity but higher impact toughness. When rolled at 900 ℃, the microstructures of different thickness layers had relatively smaller differences, with bimodal microstructures. The microstructures at surface areas had smaller grain sizes in both primary α phase and secondary α phase, while the microstructures at the central areas had larger grain sizes. Compared with the plates rolled at 1050 ℃, the plates rolled at 900 ℃ had higher tensile strength and plasticity but lower impact toughness, presenting evidence that fine-grain strengthening is the dominant mechanism for TC4ELI titanium alloy plates. In summary, rolling in the α/β phase region is more conducive to improving the microstructures and more effective to improve the uniformity of the microstructures and mechanical properties on throughthickness of TC4ELI alloy plates, compared with rolling in the single β phase region.

备注/Memo

备注/Memo:
收稿日期：2025-01-09修回日期：2025-04-14 基金项目：国铁集团重点课题项目（N2023J049）；国家重点研发计划项目（2024YFB3714200） 第一作者：王立亚，女，1990年生，高级工程师 通讯作者：郑友平，男，1989年生，高级工程师， Email：zhenguping@pzhsteel.com.cn
更新日期/Last Update: 2025-05-29