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Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - Microstructures and mechanical properties of ni60 alloy fabricated by laser metal deposition
AU - Wang, W.
AU - Liu, L.
AU - Zhang, X.
AU - Shi, Z.
AU - Tian, Y.
AU - Lin, J.
PY - 2020/1/20
Y1 - 2020/1/20
N2 - Due to its low melting point and high hardness, Ni60 (Ni-Cr-B-Si) alloy is widely used as surface cladding material for mould steel. In present study, Ni60 alloy thin-walled samples were fabricated using laser metal deposition (LMD) technology on H13 steel substrate which is usually used as mould material. The microstructure and mechanical properties (microhardness and wear resistance) of LMD Ni60 alloy were investigated. The results show that the LMD Ni60 alloy sample is mainly composed of Ni, Ni3Fe, Ni3B, Ni3Si, CrB, Cr5B3 and Cr7C3. The microstructures of the sample mainly include Ni-B-Si eutectics, Ni columnar dendrites and precipitates (boride and carbide). In the region with faster cooling rate of the sample, eutectics take a larger proportion, meanwhile precipitates are refined and dispersed uniformly. So hardness of the region can reach 950 HV. In the interlayer region, eutectics decrease while Ni dendrites increase because of the influence of remelting. The hardness of this region is about 750 HV. Wear resistance tests indicated that the wear resistance of LMD Ni60 alloy is about 9 times of H13 steel.
AB - Due to its low melting point and high hardness, Ni60 (Ni-Cr-B-Si) alloy is widely used as surface cladding material for mould steel. In present study, Ni60 alloy thin-walled samples were fabricated using laser metal deposition (LMD) technology on H13 steel substrate which is usually used as mould material. The microstructure and mechanical properties (microhardness and wear resistance) of LMD Ni60 alloy were investigated. The results show that the LMD Ni60 alloy sample is mainly composed of Ni, Ni3Fe, Ni3B, Ni3Si, CrB, Cr5B3 and Cr7C3. The microstructures of the sample mainly include Ni-B-Si eutectics, Ni columnar dendrites and precipitates (boride and carbide). In the region with faster cooling rate of the sample, eutectics take a larger proportion, meanwhile precipitates are refined and dispersed uniformly. So hardness of the region can reach 950 HV. In the interlayer region, eutectics decrease while Ni dendrites increase because of the influence of remelting. The hardness of this region is about 750 HV. Wear resistance tests indicated that the wear resistance of LMD Ni60 alloy is about 9 times of H13 steel.
KW - 3d printing
KW - Laser metal deposition
KW - Mechanical property.
KW - Microstructure
KW - Ni-cr-b-si alloy
KW - Ni60
KW - 3D printers
KW - Binary alloys
KW - Carbides
KW - Chromium alloys
KW - Cladding (coating)
KW - Dendrites (metallography)
KW - Eutectics
KW - Fabrication
KW - Hardness
KW - Mechanical properties
KW - Molds
KW - Nickel alloys
KW - Silicon alloys
KW - Silicon steel
KW - Solidification
KW - Thin walled structures
KW - Wear of materials
KW - Wear resistance
KW - 3-D printing
KW - Columnar dendrites
KW - Microstructure and mechanical properties
KW - Microstructures and mechanical properties
KW - Si alloys
KW - Thin-walled samples
KW - Nickel steel
U2 - 10.1088/2053-1591/ab69c7
DO - 10.1088/2053-1591/ab69c7
M3 - Journal article
VL - 7
JO - MATERIALS RESEARCH EXPRESS
JF - MATERIALS RESEARCH EXPRESS
SN - 2053-1591
IS - 1
M1 - 016569
ER -