Experimental and numerical investigation on temperature field and tailored mechanical properties distribution of 22MnB5 steel in spray quenching process
Experimental and numerical investigation on temperature field and tailored mechanical properties distribution of 22MnB5 steel in spray quenching process
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22MnB5钢喷雾淬火温度场和力学性能分布的实验和数值研究
DOI：
10.1016/j.jmapro.2020.07.049
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发表时间：
2020-09
影响因子：
6.2
通讯作者：
Hui Teng
中科院分区：
文献类型：
--
作者：
Liang Ying;Tianhan Gao;Minghua Dai;Ping Hu;Hui Teng
基于新型定制喷淋淬火工艺的功能梯度高强度钢结构可以实现优异的耐撞性和减重性能，在先进汽车和机械工程领域具有广阔的前景。本文重点研究了复杂喷射条件下高强度22MnB5钢的温度分布和力学性能特征。简化了基于喷雾密度的物理建模方法来描述喷雾淬火过程中22MnB5热表面的喷雾流场和水膜演变。通过自行开发的实验场景系统研究了单/双喷嘴喷射的流体特性和相应的传热强度。结果表明，流固传热系数（IHTC）取决于喷射淬火温度分布，淬火后的力学性能与喷射压力（SJP）、喷射高度（SJH）、喷嘴距离（ND）和初始淬火温度（IQT）等喷射参数之间存在密切相关。单/双喷嘴喷射条件下的平均冷却速率可达28.5~170.5°C/s和36.84~137.42°C/s，对应的峰值IHTC分别为10.11~49.47kW/(m2K)和9.69~44.76kW/(m2K)。喷淋淬火后，沿径向从中心点/区域到边缘，硬度先增大后减小。单/双喷嘴喷淋淬火后的最大径向硬度可分别比最低值高出50.21%和31.58%。此外，通过引入瞬态 IHTC 并与 CFD 和 Johnson-Mehl-Avrami (JMA) 建模相结合，进一步对面内温度场和相应的淬火后力学性能进行数值预测。最后，对U型试样进行了验证工作，表明喷雾淬火技术在获得具有定制机械性能的更复杂形状的零件方面具有广阔的前景。
Functional gradient high-strength steel structures on the basis of a novel tailored spray quenching process can achieve an excellent crashworthiness and weight reduction, which own a promising future in advanced automotive and mechanical engineering. This paper focuses on the temperature distributions and mechanical properties characteristics of high strength 22MnB5 steel under complex spray jetting conditions. A spray density-based physical modeling method is simplified to describe the spray flow field and the water film evolution on the hot 22MnB5 surface during the spray quenching process. Fluid characteristics of spray jetting with single/twin nozzles and corresponding heat transfer intensity are systematically investigated by self-developed experimental scenarios. The results reveal that the fluid-solid heat transfer coefficient (IHTC) is dependent on the spray-quenching temperature distribution, which owns an intense correlation between post-quenched mechanical property and the jetting parameters involving the spray jetting pressure (SJP), the spray jetting height (SJH), the nozzle distance (ND), and initial quenching temperature (IQT). The average cooling rate under the single/twin nozzles jetting conditions can reached as 28.5–170.5 °C/s and 36.84–137.42 °C/s, corresponding to the peak IHTCs are 10.11–49.47 kW/(m2K) and 9.69–44.76 kW/(m2K), respectively. The hardness firstly increases and then decreases from the central point/zone to the edge along the radial direction after the spray quenching process. The largest radial hardness after the single/double nozzles spray quenching can be up to 50.21 % and 31.58 % larger than the lowest value, respectively. Moreover, the in-plane temperature field and corresponding post-quenched mechanical properties are further numerically predicted by introducing into the time-dependent IHTC and coupling with the CFD and Johnson-Mehl-Avrami (JMA) modeling. Finally, a validation work of U-type specimen was conducted to show the spray quenching technology owns a prospective future for gaining more complex-shaped parts with tailored mechanical properties.
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影响因子：
6.4
作者：
L. Ying;Tianhan Gao;M. Dai;Y. Yang;P. Hu
通讯作者：
L. Ying;Tianhan Gao;M. Dai;Y. Yang;P. Hu
DOI：
10.1016/j.jmatprotec.2019.116533
发表时间：
2020-05-01
影响因子：
6.3
作者：
Farahani, Saeed;Yerra, Veera Aditya;Pilla, Srikanth
通讯作者：
Pilla, Srikanth
DOI：
10.1016/j.jmatprotec.2015.01.003
发表时间：
2016-02-01
影响因子：
6.3
作者：
Hippchen, Paul;Lipp, Arnulf;Merklein, Marion
通讯作者：
Merklein, Marion
影响因子：
2.2
作者：
M. Aamir;Q. Liao;Wang Hong;Z. Xun;Si-hong Song;M. Sajid
通讯作者：
M. Aamir;Q. Liao;Wang Hong;Z. Xun;Si-hong Song;M. Sajid
影响因子：
3
作者：
S. Nikulin;A. Rozhnov;S. Rogachev;T. A. Nechaykina;V. I. Anikeenko;V. Turilina
通讯作者：
S. Nikulin;A. Rozhnov;S. Rogachev;T. A. Nechaykina;V. I. Anikeenko;V. Turilina