中国激光, 2020, 47 (5): 0502008, 网络出版: 2020-05-12
选区激光熔化成形24CrNiMo合金钢的组织结构与力学性能 下载: 1316次
Microstructure and Mechanical Properties of 24CrNiMo Alloy Steel Formed by Selective Laser Melting
图 & 表
图 1. 24CrNiMo合金钢粉末的形貌和粒度分布。(a)形貌;(b)粒度分布
Fig. 1. Morphology and particle size distribution of 24CrNiMo alloy steel powder. (a) Morphology; (b) particle size distribution
图 4. SLM成形合金钢与铸态合金钢的XRD图谱(P=320 W, v=950 mm/s)
Fig. 4. XRD patterns of SLM-formed alloy steel and as-cast alloy steel (P=320 W, v=950 mm/s)
图 5. 合金钢的OM组织。(a)铸态合金钢(硝酸酒精溶液腐蚀);(b)(c) SLM成形合金钢的XOZ截面组织及其局部放大形貌(腐蚀剂为4%硝酸酒精溶液和Lepera溶液,P=320 W, v=950 mm/s)
Fig. 5. OM morphology of alloy steel. (a) As-cast alloy steel(etched by 4% nital); (b)(c) XOZ cross-sections of SLM-formed alloy steel (etched by 4% nital and Lepera solution, P=320 W, v=950 mm/s)
图 6. SLM成形合金钢熔池区和热影响区的TEM像(成形参数:P=320 W,v=950 mm/s)。(a)~(c)熔池区;(d)~(f)热影响区
Fig. 6. TEM images of molten pool zone and heat affected zone of SLM-formed alloy steel (forming parameters: P=320 W, v=950 mm/s). (a)--(c) Molten pool; (d)--(f) heat affected zone
图 7. 不同激光工艺参数下SLM成形合金钢XOZ截面的OM像(腐蚀剂为4%硝酸酒精溶液)
Fig. 7. OM images of XOZ cross-section of SLM-formed alloy steel with different laser parameters (etched by 4% nital)
图 8. 不同激光工艺参数条件下SLM成形合金钢XOZ截面的SEM像(腐蚀剂为4%硝酸酒精溶液)
Fig. 8. SEM images of XOZ cross-section of SLM-formed alloy steel with different laser parameters (etched by 4% nital)
图 9. 不同工艺参数下SLM成形合金钢的致密度
Fig. 9. Relative density of SLM-formed alloy steel with different laser parameters
图 10. SLM成形合金钢XOZ面形貌随激光工艺参数演化的示意图。(a)激光输入能量较低时;(b)激光输入能量较高时
Fig. 10. Schematics of XOZ cross-section morphology evolution of SLM-formed alloy steel with different parameters. (a) Low energy input; (b) high energy input
图 11. 不同激光工艺参数下SLM成形合金钢XOZ截面上熔池区和热影响区的显微硬度
Fig. 11. Microhardness of molten pool zone and heat affected zone in XOZ cross-sections of SLM-formed alloy steel with different laser parameters
图 12. SLM成形合金钢与铸态合金钢的拉伸曲线
Fig. 12. Tensile curves of SLM-formed alloy steel and as-cast alloy steel
表 124CrNiMo合金钢粉末、SLM成形合金钢与铸态合金钢的化学成分
Table1. Chemical composition of 24CrNiMo alloy steel powder, SLM-formed alloy steel and as-cast alloy steel
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表 2SLM成形合金钢与铸态合金钢的力学性能
Table2. Mechanical properties of SLM-formed alloy steel and as-cast alloy steel
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杨晨, 董志宏, 迟长泰, 谢玉江, 彭晓. 选区激光熔化成形24CrNiMo合金钢的组织结构与力学性能[J]. 中国激光, 2020, 47(5): 0502008. Chen Yang, Zhihong Dong, Changtai Chi, Yujiang Xie, Xiao Peng. Microstructure and Mechanical Properties of 24CrNiMo Alloy Steel Formed by Selective Laser Melting[J]. Chinese Journal of Lasers, 2020, 47(5): 0502008.