铝合金厚板非对称喷淋下淬火残余应力

范宁; 李志辉; 李亚楠; 李锡武; 张永安; 熊柏青

doi:10.1007/s12613-023-2645-2

Volume 30 Issue 11

Nov. 2023

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文章导航 > 矿物冶金与材料学报（英文） > 2023 > 30(11): 2200-2211

Ning Fan, Zhihui Li, Yanan Li, Xiwu Li, Yongan Zhang, and Baiqing Xiong, Residual stress with asymmetric spray quenching for thick aluminum alloy plates, Int. J. Miner. Metall. Mater., 30(2023), No. 11, pp. 2200-2211. https://doi.org/10.1007/s12613-023-2645-2

Cite this article as:

Ning Fan, Zhihui Li, Yanan Li, Xiwu Li, Yongan Zhang, and Baiqing Xiong, Residual stress with asymmetric spray quenching for thick aluminum alloy plates, Int. J. Miner. Metall. Mater., 30(2023), No. 11, pp. 2200-2211. https://doi.org/10.1007/s12613-023-2645-2

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研究论文

铝合金厚板非对称喷淋下淬火残余应力

1)
中国有研科技集团有限公司有色金属材料制备加工国家重点实验室, 北京 100088, 中国
2)
有研工程技术研究院有限公司, 北京 101407, 中国
3)
北京有色金属研究总院, 北京 100088, 中国

通讯作者:
李志辉 E-mail: lzh@grinm.com

李亚楠 E-mail: liyanan@grinm.com

文章亮点

(1) 建立了基于挠度变化的剥层法，可定量分析铝合金厚板沿厚度方向的残余应力。

(2) 揭示了铝合金厚板在不同喷淋条件下残余应力分布特征，首次发现了非对称喷淋条件下残余应力反常分布现象。

(3) 分析了铝合金厚板淬火过程中不同位置的应力应变演变行为，进一步解释了残余应力反常分布的形成机理。

中文摘要

工业化生产条件下一般采用辊底炉对大规格铝合金厚板进行固溶淬火处理，然而，厚板不同位置喷淋流量不对称或不均匀分布不可避免地导致残余应力分布不均匀，增加了后续机加工过程中控制变形的难度。本研究在自主设计的喷淋装置上对铝合金厚板进行喷淋淬火实验，并采用基于挠度变化的剥层法测试沿厚度方向的残余应力。研究结果表明，在对称喷淋条件下，铝合金厚板的残余应力在厚度方向上呈抛物线型对称分布，随着喷淋流量从0.60 m³/h降低到0.15 m³/h，残余应力水平大约降低了66%。在非对称喷淋条件下，厚板高流量侧的残余应力水平低于低流量侧，二者间的差异随着喷淋流量差异的增加而增大。当两侧的喷淋流量分别为0.60 m³/h和0.15 m³/h时，高流量侧的残余应力比低流量侧小15.38 MPa。有限元模拟结果与实验测试结果一致，即高换热系数表面的残余应力水平低于低换热系数表面。因此，有限元模拟方法可用于分析铝合金淬火过程中不同位置的温度历程和应力应变演变行为，进而预测淬火残余应力水平和分布特征。

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Research Article

Residual stress with asymmetric spray quenching for thick aluminum alloy plates

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Abstract

Abstract

Solution and quenching heat treatments are generally carried out in a roller hearth furnace for large-scale thick aluminum alloy plates. However, the asymmetric or uneven spray water flow rate is inevitable under industrial production conditions, which leads to an asymmetric residual stress distribution. The spray quenching treatment was conducted on self-designed spray equipment, and the residual stress along the thickness direction was measured by a layer removal method based on deflections. Under the asymmetric spray quenching condition, the subsurface stress of the high-flow rate surface was lower than that of the low-flow rate surface, and the difference between the two subsurface stresses increased with the increase in the difference in water flow rates. The subsurface stress underneath the surface with a water flow rate of 0.60 m³/h was 15.38 MPa less than that of 0.15 m³/h. The simulated residual stress by finite element (FE) method of the high heat transfer coefficient (HTC) surface was less than that of the low HTC surface, which is consistent with the experimental results. The FE model can be used to analyze the strain and stress evolution and predict the quenched stress magnitude and distribution.
- aluminum alloy;
- spray quenching;
- residual stress;
- layer removal method;
- finite element method

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References

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