锻压技术

脉冲电流对30CrMnSiA合金钢流动应力的影响

英文标题：Influence of pulse current on flow stress of 30CrMnSiA alloy steel

作者：李泽宇徐晓王磊夏琴香

分类号：TG115.5；TH142.2

出版年,卷(期):页码：2019,44(2):74-80

摘要：

30CrMnSiA合金钢的室温成形性能差，为探究30CrMnSiA材料电流辅助成形的可行性，基于不同试验参数的电流辅助拉伸试验，研究了温度及脉冲电流参数（电流密度、脉冲占空比和频率）对30CrMnSiA流动应力的影响规律。研究表明：30CrMnSiA的强度及伸长率随温度及电流密度的升高而下降，受脉冲占空比和频率影响不大；脉冲电流能抑制动态应变时效的强化作用，并促进碳化物的析出，使材料塑性下降。基于Voce模型基础，建立了考虑应变速率、温度及脉冲电流参数影响的30CrMnSiA电流辅助流动应力模型。利用该模型计算的结果与试验值吻合较好，说明该模型能准确预测材料在电流辅助条件下的流动应力。

The formability of 30CrMnSiA alloy steel at room temperature is poor. In order to explore the feasibility of electricallyassisted forming (EAF) of 30CrMnSiA, the influences of temperature and pulse current parameters (current density, pulse duty ratio and frequency) on flow stress of 30CrMnSiA were investigated by electricallyassisted uniaxial tensile tests under different test parameters. The results indicate that the strength and elongation of 30CrMnSiA decrease with the increase of temperature and current density and are not affected by pulse duty ratio and frequency. The strengthening effect of dynamic strain aging (DSA) is inhibited by pulse current to promote the precipitation of carbides and reduce the plasticity of 30CrMnSiA. Furthermore, based on the Voce model, a flow stress model of 30CrMnSiA considering the influence of strain rate, temperature and pulse current parameters is established, and the flow stress calculated by the model fits the experimental data well. Therefore, the flow stress under electricallyassisted condition for 30CrMnSiA can be predicted accurately by this model.

基金项目：

基金项目:广州市科技计划项目(201804010135)

作者简介：李泽宇（1993-），男，硕士研究生 Email：714454358@qq.com 通讯作者：夏琴香（1964-），女，博士，教授 Email：meqxxia@scut.edu.cn

参考文献：

［1］夏琴香. 特种旋压成形技术
［M］. 北京:科学出版社, 2017.

Xia Q X. Special Spinning Forming Technology
［M］.Beijing：Science Press，2017.

［2］Xia Q X, Xiao G F, Long H, et al. A review of process advancement of novel metal spinning
［J］. International Journal of Machine Tools & Manufacture, 2014, 85(7):100-121.

［3］吴竞飞，夏琴香，肖华，等. DP800高强钢筒形件流动旋压成形过程及旋压力分析
［J］. 锻压技术, 2017, 42(2):72-77.

Wu J F, Xia Q X, Xiao H, et al. Analysis on flow spinning process and spinning force of cylindrical tubes for high strength steel DP800
［J］. Forging & Stamping Technology, 2017, 42(2):72-77.

［4］Troitskii O A, Likhtman V I. The anisotropy of the action of electron and γ radiation on the deformation of zinc single crystals in the brittle state
［J］. Soviet Physics Doklady, 1963, (8):332-334.

［5］霭振球，闫磊，董湘怀. AZ31镁合金与DP980高强钢的纯电塑性效应实验研究
［J］. 热加工工艺, 2015,44(4):31-36.

Ai Z Q, Yan L, Dong X H. Study on pure electroplastic effect of AZ31 alloy and DP980 AHSS
［J］. Hot Working Technology, 2015, 44(4):31-36.

［6］易卓勋，赖小明，王博，等. 5A90 AlLi合金板材脉冲电流辅助拉深成形
［J］. 锻压技术，2017，42（8）：28-32.

Yi Z X，Lai X M，Wang B，et al. Pulse current auxiliary deep drawing for AlLi alloy sheet 5A90
［J］. Forging & Stamping Technology，2017，42（8）：28-32.

［7］张艳苓，侯红亮，王耀奇. 脉冲电流对1420铝锂合金超塑性及组织演变影响
［J］. 稀有金属, 2017, 41(12):1299-1304.

Zhang Y L,Hou H L,Wang Y Q. Superplasticity and microstructure evolution of 1420 AlLi alloy with current pulse
［J］. Chinese Journal of Rare Metals, 2017, 41(12):1299-1304.

［8］丁俊豪，李恒，边天军，等. 电塑性及电流辅助成形研究动态及展望
［J］. 航空学报, 2018,39(1):15-32.

Ding J H, Li H, Bian T J, et al. Status and prospects of electroplasticity and electricallyassisted forming
［J］. Acta Aeronautica et Astronautica Sinica, 2018,39(1):15-32.

［9］李世春. Zn5Al合金反常的电塑性效应
［J］. 材料研究学报, 1998，12(3):314-316.

Li S C. The negative electroplasticity in the Zn5Al alloy
［J］. Chinese Journal of Materials Research, 1998, 12(3):314-316.

［10］ASTM E8/E8M-16a, Standard test methods for tension testing of metallic materials
［S］.

［11］Xie H Y, Wang Q, Peng F, et al. Electroplastic effect in AZ31B magnesium alloy sheet through uniaxial tensile tests
［J］. Transactions of Nonferrous Metals Society of China,2015, 25(8):2686-2692.

［12］钱匡武，李效琦，萧林钢，等. 金属和合金中的动态应变时效现象
［J］. 福州大学学报：自然科学版, 2001, 29(6):8-23.

Qian K W, Li X Q, Xiao L G, et al. Dynamic strain aging phenomenon in metals and alloys
［J］. Journal of Fuzhou University：Natural Science, 2001, 29(6):8-23.

［13］李尧，彭书华，杨俊杰. 电致塑性效应对纯钽的流动应力影响
［J］. 稀有金属, 2014, 38(6):973-977.

Li R, Peng S H, Yang J J. Analysis of electroplastic effect on flow stress of tantalum
［J］. Chinese Journal of Rare Metals, 2014, 38(6):973-977.

服务与反馈：

【本网站尚未开通全文下载服务】【加入收藏】