Spherical 24CrNiMo alloy steel powder used for selective laser melting (SLM) fabricating high-speed train brake disc was prepared by the vacuum induction melting gas atomisation (VIGA) method. Powder morphology, particle size, flowability and microstructure were measured. Part properties fabricated by SLM were investigated via some modern analysis method. The experimental results showed that powder mean particle size D50 was 75 μm, flowability was 16.69 s/50 g and apparent density was 4.71 g cm−3. 24CrNiMo alloy steel specimen microstructures prepared by SLM consisted of proeutectoid ferrite and granular bainite. Average microhardness was 346 HV, tensile strength was 1223 MPa, extensibility was 13.1% and the product of strength and elongation was 16.1 GPa%. 24CrNiMo alloy steel powder prepared by the VIGA method had good laser printability and huge potential application value for SLM-fabricated brake disc.
LiZQ, HanJM, LiWJ, . Low cycle fatigue behavior of Cr–Mo–V low alloy steel used for railway brake discs. Mater Des. 2014;56:146–157. doi: 10.1016/j.matdes.2013.10.093
2.
ZengDF, LuLT, GongYH, . Optimization of strength and toughness of railway wheel steel by alloy design. Mater Des. 2016;92:998–1006. doi: 10.1016/j.matdes.2015.12.096
3.
LiZQ, HanJM, YangZY, . Analyzing the mechanisms of thermal fatigue and phase change of steel used in brake discs. Eng Fail Anal. 2015;57:202–218. doi: 10.1016/j.engfailanal.2015.07.002
4.
ConnerBP, ManogharanGP, MartofAN, . Making sense of 3-D printing: creating a map of additive manufacturing products and services. Addit Manuf. 2014;1-4:64–76. doi: 10.1016/j.addma.2014.08.005
5.
WangZY, ShenYF, GuDD.Development of porous 316L stainless steel with novel structures by selective laser melting. Powder Metall. 2011;54:225–230. doi: 10.1179/003258909X12450768326947
6.
ZhangLC, AttarH, CalinM, . Review on manufacture by selective laser melting and properties of titanium based materials for biomedical applications. Mater Technol. 2016;31:66–76. doi: 10.1179/1753555715Y.0000000076
7.
HaaseaC, TangbF, WilmscMB, . Combining thermodynamic modeling and 3D printing of elemental powder blends for high-throughput investigation of high-entropy alloys-towards rapid alloy screening and design. Mater Sci Eng A. 2017;688:180–189. doi: 10.1016/j.msea.2017.01.099
8.
AttarH, PrashanthKG, ZhangLC, . Effect of powder particle shape on the properties of in situ Ti-TiB composite materials produced by selective laser melting. J Mater Sci Technol. 2015;31:1001–1005. doi: 10.1016/j.jmst.2015.08.007
9.
BaiY, WangerG, WilliamsCB.Effect of particle size distribution on powder packing and sintering in binder jetting additive manufacturing of metals. Trans ASME J Manuf Sci Eng. 2017;139:1–6. doi: 10.1115/1.4036640
10.
AksoyA, ÜnalR.Effects of gas pressure and protrusion length of melt delivery tube on powder size and powder morphology of nitrogen gas atomised tin powders. Powder Metall. 2006;49:349–354. doi: 10.1179/174329006X89425
11.
GuoSR, ChenZJ, ZhangQL, . Effects of different pressures on laser cladding special powder prepared by gas atomization. Chin J Lasers. 2013;40:1–6.
12.
AhsanMN, PinkertonAJ, MoatRJ, . A comparative study of laser direct metal deposition characteristics using gas and plasma-atomized Ti-6Al-4V powders. Mater Sci Eng A. 2011;528:7648–7657. doi: 10.1016/j.msea.2011.06.074
13.
HuangYJ, WangY, FanHB, . A Ti-Al based alloy with excellent mechanical performance prepared by gas atomization and spark plasma sintering. Intermetallics. 2012;31:202–207. doi: 10.1016/j.intermet.2012.07.006
14.
WeiMW, ChenSY, LiangJ, . Effect of atomization pressure on the breakup of TA15 titanium alloy powder prepared by EIGA method for laser 3D printing. Vacuum. 2017;143:185–194. doi: 10.1016/j.vacuum.2017.06.014
15.
SunP, FangZZ, XiaY, . A novel method for production of spherical Ti-6Al-4V powder for additive manufacturing. Powder Technol. 2016;301:331–335. doi: 10.1016/j.powtec.2016.06.022
16.
SunZJ, TanXP, TorSB, . Selective laser melting of stainless steel 316L with low porosity and high build rates. Mater Des. 2016;104:197–204. doi: 10.1016/j.matdes.2016.05.035
17.
SanderJ, HufenbachJ, GiebelerL, . Microstructure and properties of FeCrMoVC tool steel produced by selective laser melting. Mater Des. 2016;89:335–341. doi: 10.1016/j.matdes.2015.09.148
18.
KékesinT, AmbergG, WittbergLP.Drop deformation and breakup in flows with shear. Chem Eng Sci. 2016;140:319–329. doi: 10.1016/j.ces.2015.10.019
19.
ASTM B213-2013, Standard test methods for flow rate of metal powders using the hall flowmeter funnel.
20.
ASTM B212-2013, Standard test method for apparent density of free-flowing metal powders using the hall flowmeter funnel.
21.
HeWW, TangHP, LiuY, . Preparation of high-temperature TiAl pre-alloyed powder by PREP and its densification microstructure research. Rare Met Mater Eng. 2014;23:2768–2773.
22.
LebbaM, AstaritaA, MistrettaD, . Influence of powder characteristics on formation of porosity in additive manufacturing of Ti-6Al-4V components. J Mater Eng Perform. 2017;3:1–10.
23.
ChenH, YangZG, ZhangC, . On the transition between grain boundary ferrite and bainitic ferrite in Fe-C-Mo and Fe-C-Mn alloys. The Bay Formation Explained. Acta Mater. 2016;104:62–71. doi: 10.1016/j.actamat.2015.11.012
24.
MazumderJ, ChoiJ, NagarathnamK, . The direct metal deposition of H13 tool steel for 3-D components. JOM. 1997;49:55–60. doi: 10.1007/BF02914687
25.
Abd-ElghanyK, BourellDL.Property evaluation of 304L stainless steel fabricated by selective laser melting. Rapid Prototyp J. 2012;18:420–428. doi: 10.1108/13552541211250418
26.
CasalinoG, CampanelliSL, ContuzziN, . Experimental investigation and statistical optimization of the selective laser melting process of a maraging steel. Opt Laser Technol. 2015;65:151–158. doi: 10.1016/j.optlastec.2014.07.021
