锻压技术

高压扭转对挤压态ZK60镁合金微观组织和力学性能的影响

英文标题：Effect of high pressure torsion on microstructure and mechanical properties of extruded magnesium alloy ZK60

单位：（1.安徽科技学院机械工程学院安徽凤阳 233100 2.合肥工业大学材料科学与工程学院安徽合肥 230009）

分类号：TG146.22

出版年,卷(期):页码：2018,43(5):0-0

摘要：

对一定高径比的ZK60镁合金坯料进行高压扭转实验，分析扭转圈数对ZK60镁合金显微组织及力学性能的影响，对变形ZK60镁合金沿径向进行硬度测定，并进行拉伸实验和断口扫描，分析其硬度变化规律、力学性能变化原因及其断裂机理。研究结果表明：高压扭转能有效地细化ZK60镁合金的晶粒，提高力学性能，提高抗拉强度，增强塑性变形能力等；在规定的压力、转速条件下，增加模具转动圈数，对应区域的硬度也随之提高，但沿试样半径方向提高的幅度不一致，整体呈“V”字分布；同一高压扭转条件下，不同区域的硬度整体呈“碗” 型分布；离试样中心点越远，硬度提高越显著，但变化不均匀。

Through high pressure torsion test on magnesium alloy ZK60 billet with a certain heightdiameter ratio, the influences of tension on the microstructure and mechanical properties of magnesium alloy ZK60 were analyzed. Through tensile test, fracture scanning and hardness measure of deformed magnesium alloy ZK60 along the radius direction, the reasons for changes of mechanical properties and hardness distribution, and the fracture mechanism of alloy were analyzed. The analysis results show that the high pressure torsion could effectively refine the grain, improve the mechanical properties and tensile strength and enhance the plastic deformation capability. The hardness of deformed region increases with the increasing of torsion cycles of die and presents “V” pattern distribution along the radius direction in the specified pressure and speed conditions. In the same condition of high pressure torsion, the hardness presents “bowl” pattern distribution in different areas and the farther away from the center of specimen, the hardness increases more significantly, but the change is uneven.

基金项目：

安徽高校自然科学研究重点项目（KJ2016A179）

作者简介：夏显明（1970-），男，硕士，副教授 Email：353657279@qq.com

参考文献：

［1］薛克敏，张君，李萍，等.高压扭转法的研究现状及展望
［J］ .合肥工业大学学报，2008，31(10):1613-1616.

Xue K M，Zhang J，Li P，et al．Stateoftheart of highpressure torsion and its future expectation
［J］ .Journal of Heifei University of Technology，2008，31(10):1613-1616.

［2］宋月鹏，陈苗苗，高东升，等.高压扭转法制备超细晶材料的研究进展
［J］.热加工工艺，2017，46(3):6-9,12.

Song Y P，Chen M M，Gao D S，et al．Research progress of ultrafine grained materials prepared by high pressure torsion
［J］． Hot Working Technology，2017，46(3):6-9,12.

［3］蒋婷慧，刘满平，谢学锋，等.高压扭转大塑性变形Al-Mg合金中的晶界结构
［J］.材料研究学报，2014，28(5):371-379.

Jiang T H，Liu M P，Xie X F，et al．Grain boundary structure of Al-Mg alloys processed by high pressure torsion
［J］. Chinese Journal of Materials Research，2014，28(5):371-379.

［4］夏显明，薛克敏，李萍，等．ZK60镁合金往复挤压实验研究
［J］.塑性工程学报，2017，24 (2):105-110.

Xia X M，Xue K M，Li P，et al．Experimental study on ZK60 magnesium alloy by cyclic extrusion and compressions
［J］.Journal of Plasticity Engineering，2017，24 (2): 105-110．

［5］夏显明，魏宝丽，薛克敏，等.ZK60镁合金高压扭转模拟及实验研究
［J］.塑性工程学报，2017，24(4):54-61．

Xia X M，Wei B L，Xue K M，et al．Finite element simulation and experimental study on ZK60 magnesium alloy by high pressure torsion
［J］．Journal of Plasticity Engineering，2017，24 (4): 54- 61．

［6］Kawsaki M，Figueiredor B，Langdon T G. Twentyfive years of severe plastic deformation:Recent developments in evaluating the degree of homogeneity through the thickness of disks processed by highpressure torsion
［J］. Journal of Materials Science, 2012,47(22):7719-7725.

［7］Kai M，Horita Z，Lancdon T G．Developing grain refinement and super plasticity in a magnesium alloy processed by highpressure torsion
［J］. Materials Science & Engineering A,2008，488(1-2):117-124.

［8］李峰,秦明汉，曾祥，等.镁合金大塑性变形技术的研究进展
［J］.哈尔滨理工大学学报，2014，19(6):1-5.

Li F, Qin M H, Zeng X, et al. Progress in severe plastic deformation of magnesium alloy
［J］. Journal of Harbin University of Science and Technology，2014,19(6):1-5.

［9］丁永根，王薄笑天，李萍，等.7A60 铝合金高压扭转变形微观组织及力学性能分析
［J］.塑性工程学报，2017，24 (2): 149-154．

Ding Y G，WangBo X T，Li P，et al. Analysis on microstructures and mechanical properties of 7A60 aluminum alloy after high pressure torsion
［J］.Journal of Plasticity Engineering，2017，24(2): 149-154．

［10］夏显明，薛克敏，李萍，等.挤压态ZK60 镁合金往复挤压力学性能研究
［J］.有色金属工程，2017，7(3):24-29.

Xia X M，Xue K M，Li P，et al．Study on mechanical property of extruded ZK60 magnesium alloy by cyclic extrusion and compressions
［J］. Nonferrous Metals Engineering，2017，7(3):24-29.

［11］任振伟.高压扭转工艺对生物镁锌钙合金组织及性能的影响
［D］.河南：郑州大学，2010.

Ren Z W. Microstructure and Properties of Biomaterials MgZnCa Alloy by High Pressure Torsion
［D］.Henan: Zhengzhou University，2010.

［12］卢立伟.镁合金挤压变形的组织性能与工艺研究
［D］.重庆：重庆大学，2012.

Lu L W. Study on Structure Properties and Process of Extruded Magnesium Alloy
［D］.Chongqing：Chongqing University， 2012.

［13］吴兴宇.剪切轧制形变热处理方法制备细晶纯铜材的研究
［D］.辽宁：东北大学，2012.

Wu X Y. Study on Preparation of Fine Grain Pure Copper by Shearrolling and Heat Treatment
［D］. Liaoning：Northeastern University，2012.

服务与反馈：

【文章下载】【加入收藏】