7075铝合金厚板淬火残余应力的测试与分析

秦国华; 辛志文; 林锋; 叶海潮; 韩雄

doi:10.3788/OPE.20172513.0095

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7075铝合金厚板淬火残余应力的测试与分析

微纳技术与精密机械 | 更新时间：2020-08-13

- 7075铝合金厚板淬火残余应力的测试与分析
- Testing and analysis of residual stresses in quenched 7075 aluminum alloy thick plate
- 光学精密工程 2017年25卷第10s期页码：95-103
- 作者机构：
  
  1. 南昌航空大学航空制造工程学院,江西南昌,330063
  2. 成都飞机工业(集团)有限责任公司数控加工厂, 四川成都 610092
- 作者简介：
- 基金信息：
  
  国家自然科学基金资助项目（No.51765047，No.51465045）();江西省主要学科学术和技术带头人资助计划（No.20172BCB22013）();航空科学
- DOI：10.3788/OPE.20172513.0095
  中图分类号： TG156.3;TP391.9
- 收稿日期：2017-05-15，
  
  修回日期：2017-07-06，
  
  纸质出版日期：2017-11-25
- 稿件说明：
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秦国华, 辛志文, 林锋等. 7075铝合金厚板淬火残余应力的测试与分析[J]. 光学精密工程, 2017,25(10s): 95-103

QIN Guo-hua, XIN Zhi-wen, LIN Feng etc. Testing and analysis of residual stresses in quenched 7075 aluminum alloy thick plate[J]. Editorial Office of Optics and Precision Engineering, 2017,25(10s): 95-103
秦国华, 辛志文, 林锋等. 7075铝合金厚板淬火残余应力的测试与分析[J]. 光学精密工程, 2017,25(10s): 95-103 DOI： 10.3788/OPE.20172513.0095.

QIN Guo-hua, XIN Zhi-wen, LIN Feng etc. Testing and analysis of residual stresses in quenched 7075 aluminum alloy thick plate[J]. Editorial Office of Optics and Precision Engineering, 2017,25(10s): 95-103 DOI： 10.3788/OPE.20172513.0095.

摘要

对7075铝合金厚板进行固溶处理，研究不同厚度的板材在相同介质中进行喷淋淬火和浸没淬火所产生的残余应力水平。首先对喷淋与浸没淬火过程进行有限元建模与计算，通过盲孔法和裂纹柔度法进行残余应力测试，对比分析后认为：残余应力的分布趋势，仿真值与实验结果较为吻合。其次，通过研究厚向残余应力的分布状态，分析不同厚度铝厚板喷淋淬火和浸没淬火的工艺差异，结果表明：淬火冷却速度和板材厚度是影响淬火后残余应力的关键因素，浸没淬火残余应力在板厚70 mm后无明显增幅，而喷淋淬火增幅比较均匀，淬火冷却速度越大残余应力越大；板厚在30 mm以下采用喷淋淬火产生的残余应力很小，几乎为零，而板厚从30 mm增加到100 mm过程中，喷淋淬火引起的表层压应力减小的幅度较心部拉应力要快，30到60 mm之间心部拉应力的降幅不明显，并且两者之间的差异越来越小，呈下降趋势；喷淋淬火与浸没淬火的优劣性随着厚度的增加逐渐缩小。

Abstract

After solution treatment of 7075 aluminum alloy plates

the residual stresses were respectively investigated in the processes of spraying quenching and immersion quenching with the same medium. Firstly

the finite element model was established for the spray-and immersion-quenching. The blind-hole method and crack compliance method were respectively adopted to measure the residual stresses

thus validating the FEM of quenching processes. The comparison analysis show that the simulated values of the residual stress distribution are in good agreement with the experimental measurement data. Secondly

the influence of plate thickness on the residual stress distribution was revealed for the spray quenching and immersion quenching. Obviously

the quenching cooling rate and plate thickness are critical to residual stresses. The residual stress remains unchanged when the plate thickness is more than 70 mm in the immersion quenching. However

the spray quenching can make the residual stress increase uniformly. In addition

the residual stress can increase with the increment of cooling rate. The residual stress in plates with thickness less than 30 mm is small. The surface compressive stresses

induced by the spray quenching

decrease faster than the interior tensile stresses when the plate thickness varies from 30 mm to 100 mm. Nevertheless the interior tensile stress decreased rarely if the plate thickness is from 30 mm to 60 mm. The difference between spraying quenching and immersion quenching gets smaller and smaller. Moreover

the advantage of spray quenching on immersion quenching is gradually decreased with the increase of plate thickness.

关键词

Keywords

references

王祝堂, 田荣璋. 铝合金及其加工手册[M]. 长沙:中南大学出版社, 2000. WANG ZH T, TIAN R ZH. Handbook of Aluminum Alloys and Their Manufacturing[M]. Changsha:Central South University Press, 2000. (in Chinese)

TANNER D A, ROBINSON J S. Residual stress prediction and determination in 7010 aluminum alloy forgings[J]. Experimental Mechanics, 2000, 40:75-82.

JEANMART P, BOUVAIST J. Finite element calculation and measurement of thermal stresses in quenched plates of high strength 7075 aluminum alloy[J]. Materials Science and Technology, 1985, (1):765-769.

龚海, 吴运新. 不同淬火工艺对7075铝合金板残余应力的影响[J]. 中南大学学报, 2010, 33(4):1354-1359. GONG H, WU Y X. Influence of different quenching techniques on residual stress of 7075 aluminum alloy thick-plate[J]. Journal of Central South University, 2010, 33(4):1354-1359. (in Chinese)

李淑明, 廖凯, 胡永会. 淬火温度对7075铝合金厚板残余应力的影响[J]. 热加工工艺, 2012, 41(2):198-200. LI SH M, LIAO K, HU Y H. Influence of quenching temperature on residual stress of 7075 aluminum alloy thick plate[J]. Hot Working Technology, 2012, 41(2):198-200. (in Chinese)

PRIME M B, HILL M R. Residual stress, stress relief, and inhomogeneity in aluminum plate[J]. Scripta Materialia, 2002, 46(1):77-82.

GUR C H, TEKKAYA A E, SCHULER W. Effect of boundary conditions and workpiece geometry on residual stress and microstructure in quenching process[J]. Steel Research, 1996, 67(11):501-506.

RASOULI Y S, RETRAINT D, LU J. Study of through-thickness residual stress by numerical and experimental techniques[J]. J. Strain Analysis, 1998, 33(6):449-458.

FENG X, ZHANG L, LI Z G, et al.. FEM simulation and experimental study on the quenching residual stress of aluminum alloy 2024[J]. Proceedings of the Institution of Mechanical Engineers Part B, Journal of Engineering Manufacture, 2013, 227(7):954-964.

王秋成, 柯映林. 航空高强度铝合金残余应力的抑制与消除[J]. 航空材料学报, 2002, 22(3):59-62. WANG Q CH, KE Y L. Control and relief of residual stress in high-strength aluminum alloy parts for aerospace industry[J]. Journal of Aeronautical Materials, 2002, 22(3):59-62. (in Chinese)

朱才朝, 罗家元, 李大峰, 等. 基于流变应力特性的铝合金淬火残余应力数值模拟及试验研究[J]. 机械工程学报, 2010, 46(22):41-46. ZHU C C, LUO J Y, LI D F, et al.. Numerical simulation and experimental investigation of the aluminum alloy quenching-induced residual stress by considering the flow stress characteristic[J]. Journal of Mechanical Engineering, 2010, 46(22):41-46. (in Chinese)

姚灿阳. 7050铝合金厚板淬火温度场及内应力场的数值模拟研究[D]. 长沙:中南大学, 2007. YAO C Y. Investigation on Numerical Simulation of Temperature Fields and Stress Fields for Quenched 7075 Aluminum Alloy Thick Plate[D]. Changsha:Central South University, 2007. (in Chinese)

BROWN S, SONG H. Finite element simulation of welding of large structures[J]. ASME Journal of Engineer for Industry, 1992, 114(11):441-451.

WANG K F, CHANDRASCEKAR S, YANG H T Y. An efficient 2D finite element procedure for the quenching analysis with phase change[J]. ASME Journal of Engineering for Industry, 1993, 115(2):124-137.

王光宇, 吴运新, 闫鹏飞, 等. 试样尺寸对淬火铝合金厚板残余应力的影响[J]. 材料热处理学报, 2011, 32(4):150-153. WANG G Y, WU Y X, YAN P F, et al.. Influence of sampling dimension on residual stresses of aluminum alloy thick plate[J]. Transactions of Materials and Heat Treatment, 2011, 32(4):150-153. (in Chinese)

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