Research of selective laser melting process and properties of Y2O3 dispersion strengthened high speed steel
M2 high speed steel (W6Mo5Cr4V2) is an important engineering material, and with modern industry progressing, increased requirements are put forward for improved performance of high speed steel. To improve its comprehensive properties, M2 high speed steel powder is mixed with nano-sized Y2O3 particle...
Saved in:
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | zho |
| Published: |
Science Press
2025-01-01
|
| Series: | 工程科学学报 |
| Subjects: | |
| Online Access: | http://cje.ustb.edu.cn/article/doi/10.13374/j.issn2095-9389.2023.09.25.002 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1846114573434748928 |
|---|---|
| author | Yan LIU Dingguo ZHAO Yue LI Xiaojie CUI Shuhuan WANG Yuekai XUE |
| author_facet | Yan LIU Dingguo ZHAO Yue LI Xiaojie CUI Shuhuan WANG Yuekai XUE |
| author_sort | Yan LIU |
| collection | DOAJ |
| description | M2 high speed steel (W6Mo5Cr4V2) is an important engineering material, and with modern industry progressing, increased requirements are put forward for improved performance of high speed steel. To improve its comprehensive properties, M2 high speed steel powder is mixed with nano-sized Y2O3 particles through mechanical alloying. This mixture is then used to create Y2O3 dispersion strengthened M2 high speed steel by selective laser melting (SLM) electrometallurgy technology. The process parameters for SLM are as follows: laser power of 220 W, scanning speed of 800 mm·s−1, powder layer thickness of 0.03 mm, scanning spacing of 0.1 mm, and a substrate preheating temperature of 200 ℃. The effects of Y2O3 particles on the microstructure and mechanical properties of the prepared high speed steel were investigated using various techniques, including optical microscopy, scanning electron microscopy, energy-dispersive X-ray spectroscopy, transmission electron microscopy, and mechanical property tests. Experimental results show that after low-energy ball milling, the M2 high speed steel powder remains mostly spherical with minimal deformation, preventing uneven spreading during the powder laying process. The surface of M2 high speed steel powder is coated with a large number of nanometer-sized Y2O3 particles. The relative density of Y2O3 dispersion strengthened samples formed by SLM is 98.3%. These samples exhibit a relatively smooth surface without obvious cracks, and the quality of the top surface quality is better than that of the side surfaces. The material’s basic structure and morphology are influenced by the molten pool and channel. Hexagonal honeycomb grains are evident in the molten channel, with fine grains distributed at the edges and slightly larger grains inside. The molten pool consists mainly of equiaxed crystals at the center and columnar dendrites at the boundaries, with grains growing epitaxially along the molten pool boundary. EDS (energy dispersive spectrometer) results show that elements Y and O are evenly distributed within the matrix, with no significant segregation. Subsequently, phase analysis reveals that adding Y2O3 particles has little effect on the phase composition of M2 high speed steel, which remains mainly martensite, residual austenite, and carbides. Owing to the small amount of Y2O3 added, no diffraction peaks of Y2O3 were found in the detection range. TEM results show that Y2O3 particles are larger at grain boundaries, reaching up to 90 nm, while smaller nanoparticles are diffusely distributed within the grains. Mechanical testing indicates that Y2O3 dispersion strengthened high speed steel samples fabricated by SLM exhibit good mechanical properties, with tensile strength reaching 943 MPa, a 36% increase compared to M2 high speed steel without Y2O3 particles. Its fracture surface is flat with a few cleavage steps and columnar crystals, indicating brittle fracture behavior. The addition of Y2O3 particles produces a larger number of nucleation sites, refines grain size, and hinders dislocation movement, preventing crack propagation along grain boundaries, thereby enhancing the mechanical properties of M2 high speed steel. |
| format | Article |
| id | doaj-art-29869fc44dcb49b3acb3dbf8a2214e28 |
| institution | Kabale University |
| issn | 2095-9389 |
| language | zho |
| publishDate | 2025-01-01 |
| publisher | Science Press |
| record_format | Article |
| series | 工程科学学报 |
| spelling | doaj-art-29869fc44dcb49b3acb3dbf8a2214e282024-12-20T09:19:13ZzhoScience Press工程科学学报2095-93892025-01-01471334310.13374/j.issn2095-9389.2023.09.25.002230925-0002Research of selective laser melting process and properties of Y2O3 dispersion strengthened high speed steelYan LIU0Dingguo ZHAO1Yue LI2Xiaojie CUI3Shuhuan WANG4Yuekai XUE5School of Metallurgy and Energy, North China University of Science and Technology, Tangshan 063210, ChinaSchool of Metallurgy and Energy, North China University of Science and Technology, Tangshan 063210, ChinaSchool of Metallurgy and Energy, North China University of Science and Technology, Tangshan 063210, ChinaSchool of Metallurgy and Energy, North China University of Science and Technology, Tangshan 063210, ChinaSchool of Metallurgy and Energy, North China University of Science and Technology, Tangshan 063210, ChinaSchool of Metallurgy and Energy, North China University of Science and Technology, Tangshan 063210, ChinaM2 high speed steel (W6Mo5Cr4V2) is an important engineering material, and with modern industry progressing, increased requirements are put forward for improved performance of high speed steel. To improve its comprehensive properties, M2 high speed steel powder is mixed with nano-sized Y2O3 particles through mechanical alloying. This mixture is then used to create Y2O3 dispersion strengthened M2 high speed steel by selective laser melting (SLM) electrometallurgy technology. The process parameters for SLM are as follows: laser power of 220 W, scanning speed of 800 mm·s−1, powder layer thickness of 0.03 mm, scanning spacing of 0.1 mm, and a substrate preheating temperature of 200 ℃. The effects of Y2O3 particles on the microstructure and mechanical properties of the prepared high speed steel were investigated using various techniques, including optical microscopy, scanning electron microscopy, energy-dispersive X-ray spectroscopy, transmission electron microscopy, and mechanical property tests. Experimental results show that after low-energy ball milling, the M2 high speed steel powder remains mostly spherical with minimal deformation, preventing uneven spreading during the powder laying process. The surface of M2 high speed steel powder is coated with a large number of nanometer-sized Y2O3 particles. The relative density of Y2O3 dispersion strengthened samples formed by SLM is 98.3%. These samples exhibit a relatively smooth surface without obvious cracks, and the quality of the top surface quality is better than that of the side surfaces. The material’s basic structure and morphology are influenced by the molten pool and channel. Hexagonal honeycomb grains are evident in the molten channel, with fine grains distributed at the edges and slightly larger grains inside. The molten pool consists mainly of equiaxed crystals at the center and columnar dendrites at the boundaries, with grains growing epitaxially along the molten pool boundary. EDS (energy dispersive spectrometer) results show that elements Y and O are evenly distributed within the matrix, with no significant segregation. Subsequently, phase analysis reveals that adding Y2O3 particles has little effect on the phase composition of M2 high speed steel, which remains mainly martensite, residual austenite, and carbides. Owing to the small amount of Y2O3 added, no diffraction peaks of Y2O3 were found in the detection range. TEM results show that Y2O3 particles are larger at grain boundaries, reaching up to 90 nm, while smaller nanoparticles are diffusely distributed within the grains. Mechanical testing indicates that Y2O3 dispersion strengthened high speed steel samples fabricated by SLM exhibit good mechanical properties, with tensile strength reaching 943 MPa, a 36% increase compared to M2 high speed steel without Y2O3 particles. Its fracture surface is flat with a few cleavage steps and columnar crystals, indicating brittle fracture behavior. The addition of Y2O3 particles produces a larger number of nucleation sites, refines grain size, and hinders dislocation movement, preventing crack propagation along grain boundaries, thereby enhancing the mechanical properties of M2 high speed steel.http://cje.ustb.edu.cn/article/doi/10.13374/j.issn2095-9389.2023.09.25.002selective laser meltingm2 high speed steeloxide dispersion strengthenedlaser electrometallurgymechanical property |
| spellingShingle | Yan LIU Dingguo ZHAO Yue LI Xiaojie CUI Shuhuan WANG Yuekai XUE Research of selective laser melting process and properties of Y2O3 dispersion strengthened high speed steel 工程科学学报 selective laser melting m2 high speed steel oxide dispersion strengthened laser electrometallurgy mechanical property |
| title | Research of selective laser melting process and properties of Y2O3 dispersion strengthened high speed steel |
| title_full | Research of selective laser melting process and properties of Y2O3 dispersion strengthened high speed steel |
| title_fullStr | Research of selective laser melting process and properties of Y2O3 dispersion strengthened high speed steel |
| title_full_unstemmed | Research of selective laser melting process and properties of Y2O3 dispersion strengthened high speed steel |
| title_short | Research of selective laser melting process and properties of Y2O3 dispersion strengthened high speed steel |
| title_sort | research of selective laser melting process and properties of y2o3 dispersion strengthened high speed steel |
| topic | selective laser melting m2 high speed steel oxide dispersion strengthened laser electrometallurgy mechanical property |
| url | http://cje.ustb.edu.cn/article/doi/10.13374/j.issn2095-9389.2023.09.25.002 |
| work_keys_str_mv | AT yanliu researchofselectivelasermeltingprocessandpropertiesofy2o3dispersionstrengthenedhighspeedsteel AT dingguozhao researchofselectivelasermeltingprocessandpropertiesofy2o3dispersionstrengthenedhighspeedsteel AT yueli researchofselectivelasermeltingprocessandpropertiesofy2o3dispersionstrengthenedhighspeedsteel AT xiaojiecui researchofselectivelasermeltingprocessandpropertiesofy2o3dispersionstrengthenedhighspeedsteel AT shuhuanwang researchofselectivelasermeltingprocessandpropertiesofy2o3dispersionstrengthenedhighspeedsteel AT yuekaixue researchofselectivelasermeltingprocessandpropertiesofy2o3dispersionstrengthenedhighspeedsteel |