Effect of Solution Temperature on the Microstructure and Properties of 17-4PH High-Strength Steel Samples Formed by Selective Laser Melting

Samples of 17-4PH high-strength steel were processed by selective laser melting (SLM) and solution-processed. The effects of the solution temperature on the microstructure and mechanical properties of the samples were studied. The 17-4PH high-strength steel is primarily composed of martensite, with...

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Bibliographic Details
Published in:Metals (Basel ) 2022-03, Vol.12 (3), p.425
Main Authors: Zhao, Zhanyong, Wang, Hailin, Huo, Pengcheng, Bai, Peikang, Du, Wenbo, Li, Xiaofeng, Li, Jianmin, Zhang, Wei
Format: Article
Language:English
Subjects:
17-4PH
Aging
Coefficient of friction
Crack propagation
Crystal structure
Experiments
Friction
Grain size
High strength steel
High strength steels
Laser beam melting
Lasers
Manufacturing
Martensite
Mechanical properties
Microstructure
microstructure and properties
Precipitates
Precipitation hardening
SLM
Solution heat treatment
solution temperature
Stainless steel
Temperature
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Summary:Samples of 17-4PH high-strength steel were processed by selective laser melting (SLM) and solution-processed. The effects of the solution temperature on the microstructure and mechanical properties of the samples were studied. The 17-4PH high-strength steel is primarily composed of martensite, with a small number of austenite phases, and contains many dislocations. After the solution treatment, the grain size gradually increased, yielding typical martensite. The samples were subjected to an aging treatment after the solution treatment. Precipitates formed in the samples, conducive to improving their strength and hardness. The Vickers hardening and wear properties of the 17-4PH high-strength steel samples first increased and then decreased with increasing solution temperature. After the solution treatment at 1040 °C for 2 h and aging at 480 °C for 4 h, the Vickers hardening of the 17-4PH high-strength steel increased to 392 HV0.5, and the friction coefficient was approximately 0.6. These values were, respectively, 7% and 5% higher than those for the untreated samples.
ISSN:2075-4701
2075-4701
DOI:10.3390/met12030425