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基于集成RSM和NSGA-Ⅱ的SLM成形GH3625高溫合金尺寸精度優(yōu)化研究
作者:
作者單位:

1.南昌航空大學(xué);2.南昌大學(xué)

作者簡介:

通訊作者:

中圖分類號:

TG132.3

基金項(xiàng)目:

江西省研究生創(chuàng)新專項(xiàng)資金項(xiàng)目


Optimization study of dimensional accuracy of SLM forming GH3625 superalloy based on integrated RSM and NSGA-II
Author:
Affiliation:

1.School of Aeronautical Manufacturing Engineering, Nanchang Hangkong University;2.School of Advanced Manufacturing, Nanchang University

Fund Project:

Special Funding Program for Graduate Student Innovation in Jiangxi Province

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    摘要:

    選區(qū)激光熔化(SLM)是目前應(yīng)用最廣的金屬材料增材制造技術(shù)之一，由于成形過程中存在復(fù)雜的熱物理過程，導(dǎo)致其成形精度仍無法滿足實(shí)際應(yīng)用的要求。因此，為了提高SLM成形零件的尺寸精度，本研究提出了一種集成響應(yīng)面法(RSM)和非支配排序遺傳算法-Ⅱ(NSGA-Ⅱ)的方法來優(yōu)化SLM成形GH3265高溫合金的尺寸精度。首先采用響應(yīng)面法建立了SLM工藝參數(shù)與X、Y和Z方向的尺寸誤差模型，然后通過NSGA-Ⅱ?qū)δＰ瓦M(jìn)行多目標(biāo)優(yōu)化。結(jié)果表明：響應(yīng)面法構(gòu)建的模型具有較高的預(yù)測精度，其相關(guān)系數(shù)R2依次為0.9456、0.9842、0.9704；優(yōu)化算法在迭代1500次時，能夠獲得最優(yōu)的加工參數(shù)區(qū)間：激光功率250.8-310 W、掃描速度1028-1400 mm/s、掃描間距0.071-0.084 mm；最終，試驗(yàn)驗(yàn)證結(jié)果表明該集成方法具有較高的可靠性，其X、Y、Z方向尺寸誤差的ARE依次為5.95%、4.92%、3.97%。

    Abstract:

    Selective laser melting (SLM) is one of the most widely used technologies for additive manufacturing of metallic materials, and its forming accuracy still cannot meet the requirements of practical applications due to the complex thermo-physical processes in the forming process. Therefore, in order to improve the dimensional accuracy of SLM formed parts, this study proposes an integrated Response Surface Methodology (RSM) and Non-dominated Sorting Genetic Algorithm-II (NSGA-II) approach to optimize the dimensional accuracy of SLM formed GH3265 superalloy. Firstly, a model of SLM process parameters with dimensional errors in X, Y and Z directions was developed using response surface methodology, and then the model was optimized by NSGA-II for multi-objective optimization. The results show that: the model constructed by the response surface method has high prediction accuracy, and the correlation coefficients R2 are 0.9456, 0.9842, and 0.9704 in order; The optimization algorithm is able to obtain the optimal interval of the processing parameters at 1500 iterations: the laser power is 250.8-310W, the scanning speed is 1028-1400mm/s, the hatching space is 0.071-0.084 mm; The experimental validation results show the high reliability of the integrated method with ARE of 5.95%, 4.92%, and 3.97% for dimensional errors in X, Y, and Z directions, in that order.

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引用本文

曾權(quán),王克魯,魯世強(qiáng),魯翠媛,李鑫,周潼,汪增強(qiáng).基于集成RSM和NSGA-Ⅱ的SLM成形GH3625高溫合金尺寸精度優(yōu)化研究[J].稀有金屬材料與工程,2024,53(9):2624~2632.[zengquan, wangkelu, lushiqiang, lucuiyuan, lixin, zhoutong, wangzengqiang. Optimization study of dimensional accuracy of SLM forming GH3625 superalloy based on integrated RSM and NSGA-II[J]. Rare Metal Materials and Engineering,2024,53(9):2624~2632.]
DOI：10.12442/j. issn.1002-185X.20230475

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  • 收稿日期:2023-08-01
  • 最后修改日期:2023-09-12
  • 錄用日期:2023-09-14
  • 在線發(fā)布日期: 2024-09-13
  • 出版日期: 2024-09-04