锻压技术

摩擦对高压扭转IF钢试样不均匀变形特征的影响

英文标题：Influence of friction on heterogeneous plastic deformation for high

分类号：TG302

出版年,卷(期):页码：2018,43(11):127-131

摘要：

采用有限元软件DEFORM-3D，对无间隙原子钢试样的高压扭转过程进行了模拟仿真，研究了摩擦对高压扭转试样塑性变形特征的影响。模拟结果表明：试样与模具间的摩擦因数对高压扭转试样塑性变形过程的影响较大，直接影响试样的塑性变形程度；试样飞边会随着摩擦的增加而变短；在压缩阶段，摩擦将阻碍试样的塑性变形，导致显著的不均匀塑性变形特征；在扭转阶段，摩擦促进试样的塑性变形，摩擦因数越大，试样的不均匀塑性变形越大。同时，高压扭转过程中试样边缘出现大塑性变形和飞边，随着摩擦系数的增加，大塑性变形区域逐渐向试样心部靠拢，试样飞边长度逐渐变短，高压扭转试样硬度分布的测试结果与模拟结果一致。

The high-pressure torsion (HPT) process of interstitial-free steel specimen was simulated by finite analysis software DEFORM-3D, and the influences of friction on heterogeneous plastic deformation of HPT specimen were investigated. The results indicated that the friction factor between specimen and mould plays an important role on the heterogeneous plastic deformation and influences the degree of plastic deformation directly. However, the fin length of HPT specimen decreases with the increase of fiction. In addition, the friction impedes the plastic deformation in the compression stage resulting in significant heterogeneous plastic deformation characteristics, the friction remarkably promotes plastic deformation in the torsion stage, and the larger the fiction factor is, the greater the uneven plastic deformation of specimen is. At the same time, severe plastic deformation and fin occur at the edge of specimen in the HPT process. With the increase of fiction factor, the area of severe plastic deformation gradually approaches the core of specimen, and the fin length of specimen becomes shorter gradually. At last, the test results of the hardness distribution of the HPT specimen are consistent with the simulation results.

基金项目：

国家十三五智能农机装备重点研发计划资助项目(2016YFD0701701，2018YFD0700604)；山东省现代农业产业技术体系果品产业创新团队资金资助项目(SDAIT-06-12，SDAIT-06-1)；山东农业大学“双一流”科技创新团队专项资助项目(SYL2017XTTD07)；山东省重大科技创新工程项目（2018CXGC0209）

张紫涵（1994-），女，硕士研究生,E-mail：zpurpleh@163.com;通讯作者：宋月鹏（1971-），男，博士，教授,E-mail：uptonsong@163.com

参考文献：

［1］钟志华，李光耀.冲压成形CAE技术中接触摩擦计算的新方法
［J］. 机械工程学报，2001，37(2)：33-37.

Zhong Z H，Li G Y. New methods for frictional contact in simulation of sheet metal forming
［J］. Chinese Journal of Mechanical Engineering, 2001，37 (2):33-37.

［2］赵振铎.板料冲压工艺中的摩擦与润滑
［J］. 锻压机械，1997，(1)：3-6.

Zhao Z D. Friction and lubrication in sheet metal stamping process
［J］. Metalforming Machinery. 1997，(1)：3-6.

［3］李卫旗，马庆贤.摩擦行为在锻造过程中的研究现状与进展
［J］. 锻压技术，2014，39(6)：9-19.

Li W Q, Ma Q X. Developments and prospects of friction behavior during forging process
［J］. Forging & Stamping Technology, 2014，39(6): 9-19.

［4］Kamrani M, Levitas V I, Feng B. FEM simulation of large deformation of copper in the quasi-constrain high-pressure-torsion setup
［J］. Materials Science & Engineering A, 2017, 705: 219-230.

［5］Yang X H, Yi J H, Ni S, et al. Microstructural evolution and structure-hardness relationship in an Al-4wt.%Mg alloy processed by high-pressure torsion
［J］. Journal of Materials Engineering & Performance, 2016, 25(5): 1909-1915.

［6］Dong J L, Kim H S. Finite element analysis for the geometry effect on strain inhomogeneity during high-pressure torsion
［J］. Journal of Materials Science, 2014, 49(19): 6620-6628.

［7］宋月鹏，张紫涵，高东升，等.无间隙原子钢高压扭转过程中塑性变形的滞后性研究
［J］.中国科学:技术科学, 20108, 48(2)：154-160.

Song Y P, Zhang Z H, Gao D S, et al. Deformation lagging characteristics of IF steel disks in the plastic deformation process of high pressure torsion
［J］. Sci. Sin. Tech., 2018, 48(2):154-160.

［8］许晓静，张增雷，王浩，等.摩擦对大型等通道转角压最大挤压载荷的影响
［J］.机械工程学报，2011，47(1)：102-107.

Xu X J, Zhang Z L, Wang H, et al. Effect of friction on maximum pressing load of scaling-up equal channel angular pressing
［J］. Journal of Materials Engineering, 2011, 47 (1)：102-107.

［9］Song Y P, Wang W, Gao D, et al. Finite element analysis of the effect of friction in high pressure torsion
［J］. Metals & Materials International, 2014, 20(3):445-450.

［10］Kim H S, Song Y P, Chen M, et al. Effects of friction and anvil design on plastic deformation during the compression stage of high-pressure torsion
［J］. Journal of the Korean Institute of Metals and Materials, 2016, 54(11): 831-837.

［11］Segal V, Rosochowski A, Olejnik L, et al. Severe Plastic Deformation Technology
［M］. Dunbeath: Whittles Publishing, 2017.

［12］Wang N, Pea L V W, Wang L, et al. Experimental and simulation studies of strength and fracture behaviors of wind turbine bearing steel processed by high pressure torsion
［J］. Energies, 2016, 9(12):1033.

［13］Edalati K, Horita Z. A review on high-pressure torsion (HPT) from 1935 to 1988
［J］. Materials Science & Engineering A, 2016, 652: 325-352.

［14］Balasubramanian N, Langdon T G. The strength-grain size relationship in ultrafine-grained metals
［J］. Metallurgical & Materials Transactions A, 2016, 47(12): 5827-5838.

［15］Feng B, Levitas V I. Plastic flows and strain-induced alpha to omega phase transformation in zirconium during compression in a diamond anvil cell: Finite element simulations
［J］. Materials Science & Engineering A, 2017, 680:130-140

［16］Misra R D K, Wan X L, Challa V S A, et al. Relationship of grain size and deformation mechanism to the fracture behavior in high strength-high ductility nanostructured austenitic stainless steel
［J］. Materials Science & Engineering A, 2015, 626: 41-50.

服务与反馈：

【本网站尚未开通全文下载服务】【加入收藏】