Influence of Aging Treatment on Microstructure and Mechanical Properties of SLMed Ultra-high Strength Steel

WANG Shuai; WANG Changjun; JIANG Fengchun; DONG Chao; MIAO Senmiao; CHU Weihan; GUO Chunhuan

doi:10.7512/j.issn.1001-2303.2026.08.04

Quality and Efficiency in High\-Strength Steel Welding | Views : 0 下载量: 15 CSCD: 0

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Influence of Aging Treatment on Microstructure and Mechanical Properties of SLMed Ultra-high Strength Steel
Vol. 56, Issue 8, Pages: 41-48(2026)
Received：01 July 2026，

Revised：2026-07-16，

Published：20 August 2026
DOI： 10.7512/j.issn.1001-2303.2026.08.04
稿件说明：

移动端阅览

王帅，王长军，姜风春，等.时效工艺对SLM超高强钢微观组织与力学性能的影响［J］.电焊机，2026，56（8）：41-48. DOI： 10.7512/j.issn.1001-2303.2026.08.04.

WANG Shuai, WANG Changjun, JIANG Fengchun, et al.Influence of Aging Treatment on Microstructure and Mechanical Properties of SLMed Ultra-high Strength Steel[J].Electric Welding Machine, 2026, 56(8): 41-48. DOI： 10.7512/j.issn.1001-2303.2026.08.04.

摘要

为探究时效温度与保温时间对选区激光熔化（SLM）超高强钢在不同时效工艺下的微观组织演变及力学性能变化，对SLM超高强钢进行低温长时效（480 ℃×8 h）和高温短时效（530 ℃×3 h）处理，结合X射线衍射（XRD）、电子背散射衍射（EBSD）及透射电子显微镜（TEM）分析，揭示了逆转变奥氏体及纳米析出相（η-Ni

Ti和Laves-Fe

Mo）的形成机制。结果表明，低温长时效工艺促进了高密度针状η-Ni

Ti单相弥散析出，维持了高位错密度，从而实现2 400 MPa级的超高强度。高温短时效工艺则导致η-Ni

Ti相粗化并伴随Laves-Fe

Mo相双相析出，沉淀强化效果下降，强度显著降低但塑性有所提升。本研究为SLM超高强钢的时效工艺优化及性能调控提供了理论依据。

Abstract

This study systematically investigated the microstructural evolution and mechanical property variations of selective laser mel

ting (SLM) ultra-high strength steel (UHSS) subjected to different aging treatments. Through low-temperature long-duration aging (480 ℃×8 h) and high-temperature short-duration aging (530 ℃×3 h)

combined with X-ray diffraction (XRD)

electron backscatter diffraction (EBSD)

and transmission electron microscopy (TEM) characterization

the formation mechanisms of reverted austenite and nano-scale precipitates (η-Ni

Ti and Laves-Fe

Mo) were elucidated. The results demonstrate that the low-temperature long-duration aging treatment promoted the homogeneous dispersion of high-density needle-like η-Ni

Ti single-phase precipitates while maintaining a high dislocation density

thereby achieving an ultra-high strength of 2400 MPa. In contrast

the high-temperature short-duration aging treatment induced the coarsening of η-Ni

Ti precipitates accompanied by the dual-phase precipitation of Laves-Fe

leading to a diminished precipitation strengthening effect with significantly reduced strength but enhanced ductility. This study provides a theoretical basis for the optimization of aging protocols and performance tailoring of SLM-processed ultra-high-strength steels.

关键词

Keywords

references

LIVERANI E ， TOSCHI S ， CESCHINI L ， et al . Effect of selective laser melting （SLM） process parameters on microstructure and mechanical properties of 316L austenitic stainless steel ［J］. Journal of Materials Processing Technology ， 2017 ， 249 ： 255 - 263 .

GU D ， HAGEDORN Y C ， MEINERS W ， et al . Densification behavior，microstructure evolution， and wear performance of selective laser melting processed commercially pure titanium ［J］. Acta Materialia ， 2012 ， 60 （ 9 ）： 3849 - 3860 .

JU Y ， LI C ， YANG X ， et al . Recent progress on additive manufacturing of steel-based functionally graded materials ［J］. Materials Today Communications ， 2024 ， 40 ： 109953 .

HUANG G ， WEI K ， DENG J ， et al . High power laser powder bed fusion of 18Ni300 maraging steel： Processing optimization， microstructure and mechanical properties ［J］. Materials Science and Engineering：A ， 2022 ， 856 ： 143983 .

BAE K C ， KIM D ， KIM Y H ， et al . Effect of heat treatment， building direction，and sliding velocity on wear behavior of selectively laser-melted maraging 18Ni-300 steel against bearing steel ［J］. Wear ， 2021 ， 482 ： 203962 .

TEKIN T ， ISCHIA G ， NACLERIO F ， et al . Effect of a direct aging heat treatment on the microstructure and the tensile properties of a 18Ni-300 maraging steel produced by Laser Powder Bed Fusion ［J］. Materials Science and Engineering：A ， 2023 ， 872 ： 144921 .

SIMSON T ， KOCH J ， ROSENTHAL J ， et al . Mechanical properties of 18Ni-300 maraging steel manufactured by LPBF ［J］. Procedia Structural Integrity ， 2019 ， 17 ： 843 - 849 .

MEI X ， YAN Y ， FU H ， et al . Effect of aging temperature on microstructure evolution and strengthening behavior of L-PBF 18Ni （300） maraging steel ［J］. Additive Manufacturing ， 2022 ， 58 ： 103071 .

吴文伟，向超，张涛，等 . 热处理工艺对选区激光熔化成型18Ni300马氏体时效钢微观组织及力学性能的影响［J］. 金属学报， 2025 ， 61 （ 10 ）： 1515 - 1530 .

WU W W ， XIANG C ， ZHANG T ， et al . Effect of heat treatment process on microstructure and mechanical properties of selective laser melted 18Ni300 maraging steel ［J］. Acta Metallurgica Sinica ， 2025 ， 61 （ 10 ）： 1515 - 1530 .

NIU M ， ZHOU G ， WANG W ， et al . Precipitate evolution and strengthening behavior during aging process in a 2.5 GPa grade maraging steel ［J］. Acta Materialia ， 2019 ， 179 ： 296 - 307 .

NIU M C ， YIN L C ， YANG K ， et al . Synergistic alloying effects on nanoscale precipitation and mechanical properties of ultrahigh-strength steels strengthened by Ni3Ti， Mo-enriched， and Cr-rich co-precipitates ［J］. Acta Materialia ， 2021 ， 209 ： 116788 .

TAN C ， ZHOU K ， MA W ， et al . Microstructural evolution， nanoprecipitation behavior and mechanical properties of selective laser melted high-performance grade 300 maraging steel ［J］. Materials & Design ， 2017 ， 134 ： 23 - 34 .

YIN S ， CHEN C ， YAN X ， et al . The influence of aging temperature and aging time on the mechanical and tribological properties of selective laser melted maraging 18Ni-300 steel ［J］. Additive Manufacturing ， 2018 ， 22 ： 592 - 600 .

KEMPEN K ， YASA E ， THIJS L ， et al . Microstructure and mechanical properties of selective laser melted 18Ni-300 steel ［J］. Physics Procedia ， 2011 ， 12 ： 255 - 263 .

YANG Z ， ZHANG J ， YU L ， et al . Effects of aging time on the microstructure and mechanical properties of 18Ni200 maraging steel ［J］. Journal of Materials Research and Technology ， 2025 ， 37 ： 368 - 379 .

DU Y ， XU T Z ， ZHANG S ， et al . Effect of aging treatment on the microstructure and tribological properties of a new maraging steel manufactured by laser directed energy deposition ［J］. Materials Characterization ， 2024 ， 209 ： 113767 .

JÄGLE E A ， SHENG Z ， KÜRNSTEINER P ， et al . Comparison of maraging steel micro- and nanostructure produced conventionally and by laser additive manufacturing ［J］. Materials ， 2017 ， 10 （ 1 ）： 8 .

BODZIAK S ， AL-RUBAIE K S ， DALLA VALENTINA L ， et al . Precipitation in 300 grade maraging steel built by selective laser melting： Aging at 510 ℃ for 2 h ［J］. Materials Characterization ， 2019 ， 151 ： 73 - 83 .

PARDAL J M ， TAVARES S S M ， TERRA V F ， et al . Modeling of precipitation hardening during the aging and overaging of 18Ni-Co-Mo-Ti maraging 300 steel ［J］. Journal of Alloys and Compounds ， 2005 ， 393 （ 1-2 ）： 109 - 113 .

TEWARI R ， MAZUMDER S ， BATRA I S ， et al . Precipitation in 18 wt% Ni maraging steel of grade 350 ［J］. Acta Materialia ， 2000 ， 48 （ 5 ）： 1187 - 1200 .

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