AZ61镁合金加工图及其在轧制成形中的应用
Processing Map of AZ61 Magnesium Alloy and Its Application in Rolling
摘 要
采用Gleeble-1500型热模拟试验机对AZ61镁合金在变形温度250～400 ℃、应变速率0.001～10 s-1条件下进行热压缩试验, 研究了合金的热压缩变形行为, 得到了其加工图, 并将得到的最佳变形工艺成功应用于轧制成形。结果表明: 合金在变形温度250～400 ℃、应变速率10 s-1的变形条件下具有较高的能量耗散效率, 该工艺参数范围为合金的最佳变形工艺; 在该工艺参数范围内进行轧制变形可获得组织均匀、力学性能优异的镁合金板材, 其平均晶粒尺寸在3～10 μm之间, 抗拉强度和伸长率则分别在292.9～329.7 MPa和21.4%～27.5%之间。
热压缩
加工图
轧制成形
AZ61 alloy
hot compression
processing map
rolling
Abstract
Hot compression of AZ61 magnesium alloy was conducted on a Gleeble-1500 thermo-simulation test machine at deformation temperature range of 250-400 ℃ and strain rate range of 0.001-10 s-1. Deformation behavior and processing map were investigated, and the optimal processing parameters were successfully applied in rolling. The results show that ZA61 alloy deformed at strain rate of 10 s-1and temperature range of 250-400 ℃, the optimum process for the hot processing of the AZ61 alloy, displayed a efficiency of higher power dissipation. Magnesium alloy sheets with uniform structure and excellent mechanical properties could be fabricated when rolled at this region. The average grain size of the rolled sheets was in the range of 3-10 μm, the tensile strength and elongation of the sheets ranged from 292.9 MPa to 329.7 MPa and 21.4% to 27.5%, respectively.
中图分类号 TG146.1
所属栏目 试验研究
基金项目
收稿日期 2013/8/28
修改稿日期 2014/4/10
网络出版日期
作者单位点击查看
备注董勇(1974-), 男, 湖南衡阳人, 实验师, 硕士。
引用该论文: DONG Yong,WANG Zhe-neng,ZHANG Rong. Processing Map of AZ61 Magnesium Alloy and Its Application in Rolling[J]. Materials for mechancial engineering, 2014, 38(6): 41～45
董勇,汪哲能,张蓉. AZ61镁合金加工图及其在轧制成形中的应用[J]. 机械工程材料, 2014, 38(6): 41～45
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参考文献
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【3】汪凌云, 黄光杰, 陈林, 等. 镁合金板材轧制工艺及组织性能分析 ［J］.稀有金属材料与工程,2007,36(5):910-914.
【4】ZHU S Q, YAN H G, CHEN J H, et al. Feasibility of high strain-rate rolling of a magnesium alloy across a wide temperature range ［J］. Scripta Materialia,2012,67(4):404-407.
【5】曾卫东,周义刚,周军,等.加工图理论研究进展 ［J］.稀有金属材料与工程,2006,35(5):673-677.
【6】HUANG G S, HUANG G J, WANG L Y, et al. Processing map for hot working of as extruded AZ31B magnesium alloy［J］.Transactions of Nonferrous Metals Society of China,2005,15(4):813-817.
【7】XU Y, HU L X, DENG T Q, et al. Hot deformation behavior and processing map of as-cast AZ61 magnesium alloy［J］.Materials Science and Engineering: A,2013,559:528-533.
【8】ZHOU H T, LI Q B, ZHAO Z K, et al. Hot workability characteristics of magnesium alloy AZ80-using processing map［J］.Materials Science and Engineering: A,2010,527:2022-2026.
【9】WANG C Y, WANG X J, CHANG H, et al. Processing maps for hot working of ZK60 magnesium alloy［J］.Materials Science and Engineering: A,2007,464(1/2):52-58.
【10】江海涛,陆春洁,段晓鸽,等.AZ31镁合金的热变形加工图及其应用 ［J］.北京科技大学学报,2012,34(7):808-812.
【11】王少楠, 唐国翌, 傅万堂, 等. 铸态AZ61镁合金热压缩变形组织变化 ［J］.材料热处理学报,2009,30(5):39-43.
【12】MYSHLYAEV M M, MCQUEEN H J, MWEMBELA A, et al. Twinning, dynamic recovery and recrystallization in hot worked Mg-Al-Zn alloy［J］.Materials Science and Engineering: A,2002,337:121-131.
【13】PRASAD Y V R K, SASIDHARE S. Hot working guide: a compendium of processing map［M］.Materials Park,OH: ASM International,1997.
【14】PRASAD Y V R K, GEGEL H L, DORAIVELU S M, et al. Moldeling of dynamic material behavior in hot deformation: forging of Ti-6242［J］.Metallurgical Transactions,1984,15(10):1883-1892.
【15】MURTY S V S N, RAO B N. On the polar reciprocity model for hot deformation characteristics of materials ［J］.Bulletin of Material Science,1999,22(1):9-10.
【16】ZHU S Q, YAN H G, CHEN J H, et al. Fabrication of Mg-Al-Zn-Mn alloy sheets with homogeneous fine-grain structure using high strain-rate rolling in a wide temperature range［J］.Materials Science and Engineering: A,2013,559:765-772.
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