锻压技术

冷却方式对热轧制Ti6Al4V小规格棒材组织与性能的影响

英文标题：Influence of cooling methods on microstructure and properties for hot rolled Ti-6Al-4V bar with small-size

作者：崔文俊1 2 朱晓翠1 2 任伟宁1 2

分类号：TG146.2+4

出版年,卷(期):页码：2021,46(12):224-227

摘要：

将经过两次真空自耗熔炼的直径为Φ620 mm的铸锭采用锻造方式将其拔长至横截面边长为120 mm的长方体坯料，将型号为350#、250#的两种横列式轧机配合使用，将横截面边长为120 mm的长方体坯料多道次连续变形轧制为小规格棒材目标尺寸，对同一工艺路线生产的材料，在终轧冷却时分别采用常规空冷、水箱冷却以及浇水冷却3种冷却方式，对其组织变化以及力学性能结果进行分析和对比研究。结果表明：在同一工艺生产路线下，水箱冷却得到的棒材横截面组织的等轴性最均匀；空冷方式下，棒材的屈强比最均衡。通过不同的处理方式得到的组织性能结果各有不同，可以根据市场的不同需求设定不同的工艺路线，可用于生产指导。

The ingot with the diameter of Φ620 mm after two times of vacuum consumable melting was drawn up to a rectangular billet with a cross-sectional side length of 120 mm by forging, which was continuously formed and rolled in multiple passes to the target size of the small-sized bar by combining with 350# and 250# horizontal rolling mills. Then, three kinds of conding methods such as conventional air cooling, water tank cooling and spray cooling were used to cool the materials produced in the same process route during the final rolling cooling, and the microstructure changes and mechanical property results were analyzed and comparative researched. Results show that under the same process production route, the most uniform isometric of cross-section microstructure of bar can be obtained by water tank cooling, and the most balanced yield-tensile strength ratio of bar can be obtained by air cooling. Thus, the microstructures and mechanical properties are different obtained by different treatment methods, and the different process routes can be set to guide the production according to different needs of market.

基金项目：

陕西省重点研发计划项目（2020ZDLGY01-07）

作者简介：崔文俊（1990-），男，学士，工程师 E-mail：524198775@qq.com

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