中国激光, 2020, 47 (11): 1102002, 网络出版: 2020-11-11
30CrMnSiA和30CrMnSiNi2A高强钢激光熔覆修复后的组织特征与力学性能 
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Microstructures and Mechanical Properties of 30CrMnSiA and 30CrMnSiNi2A High-Strength Steels After Laser-Cladding Repair
图 & 表
图 1. 30CrMnSiA合金粉末的形貌和尺寸。(a) SEM形貌;(b)粒径分布
Fig. 1. Morphology and size of 30CrMnSiA alloy powders. (a) SEM morphology; (b) particle size distribution
图 2. 激光熔覆及力学性能测试试样的取样示意图。(a)带缺口的熔覆基板;(b)激光熔覆加工示意图;(c)激光扫描方式;(d)力学性能测试试样的取样方式
Fig. 2. Schematics of laser-cladding and sampling of mechanical properties test samples. (a) Substrate with notch for lase cladding; (b) diagram of laser-cladding; (c) laser scanning pattern; (d) sampling method of mechanical properties test samples
图 3. 拉伸试样和冲击试样示意图。(a)冲击试样;(b)拉伸试样
Fig. 3. Schematics of tensile samples and impact samples. (a) Impact sample; (b) tensile sample
图 4. 两种高强钢经多层多道激光熔覆后的横截面宏观形貌。(a) 30CrMnSiA基体;(b) 30CrMnSiA热影响区;(c) 30CrMnSiNi2A基体;(d) 30CrMnSiNi2A热影响区
Fig. 4. Cross-section macroscopic morphology of two high-strength steels after multi-layer laser-cladding. (a) 30CrMnSiA substrate; (b) HAZ on 30CrMnSiA substrate; (c) 30CrMnSiNi2A substrate; (d) HAZ on 30CrMnSiNi2A substrate
图 5. 两种高强钢基体和热影响区的微观组织。(a) 30CrMnSiA基体;(b) 30CrMnSiA热影响区;(c) 30CrMnSiNi2A基体;(d) 30CrMnSiNi2A热影响区
Fig. 5. Microstructures of two high-strength steel substrates and HAZ. (a) 30CrMnSiA substrate; (b) HAZ on 30CrMnSiA substrate; (c) 30CrMnSiNi2A substrate; (d) HAZ on 30CrMnSiNi2A substrate
图 6. 30CrMnSiA基体上多层熔覆层的微观组织。(a)第1层;(b)第2层;(c)第3层;(d)第4层;(e)第5层;(f)第6层(盖面层)
Fig. 6. Microstructures of different cladding layers on 30CrMnSiA substrate. (a) The first layer; (b) the second layer; (c) the third layer; (d) the fourth layer; (e) the fifth layer; (f) the sixth layer (cap layer)
图 7. 30CrMnSiNi2A基体上多层熔覆层的微观组织。(a)第1层;(b)第2层;(c)第3层;(d)第4层;(e)第5层;(f)第6层(盖面层)
Fig. 7. Microstructures of different cladding layers on 30CrMnSiNi2A substrate. (a) The first layer; (b) the second layer; (c) the third layer; (d) the fourth layer; (e) the fifth layer; (f) the sixth layer (cap layer)
图 8. 高强钢基体上熔覆层试样横截面的金相图和显微硬度分布。(a) 30CrMnSiA,金相图;(b) 30CrMnSiNi2A,金相图;(c) 30CrMnSiA,显微硬度分布;(d) 30CrMnSiNi2A,显微硬度分布
Fig. 8. Metallography image and microhardness distribution in cross-section of cladding samples on two high strength steel substrates. (a) 30CrMnSiA, metallography image; (b) 30CrMnSiNi2A, metallography image; (c) 30CrMnSiA, microhardness distribution; (d) 30CrMnSiNi2A, microhardness distribution
图 9. 两种基体及熔覆层试样的室温力学性能。(a)冲击韧性;(b)拉伸性能
Fig. 9. Mechanical properties of two substrates and cladding samples at room-temperature. (a) Impact toughness; (b) tensile property
图 10. 不同基体上熔覆层试样的冲击断口形貌。(a)(c) 30CrMnSiA基体上熔覆层试样的断口以及裂纹源处的局部放大图;(b)(d) 30CrMnSiNi2A基体上熔覆层试样的断口以及裂纹源处的局部放大图
Fig. 10. Impact fracture morphologies of cladding samples on different substrates. (a)(c) Fracture of cladding sample on 30CrMnSiA substrate and partially enlarged crack source; (c)(d) fracture of cladding sample on 30CrMnSiNi2A substrate and partially enlarged crack source
图 11. 30CrMnSiA基体上熔覆层试样拉伸断口的横截面形貌。(a)横截面形貌;(b)~(d)局部放大图
Fig. 11. Tensile fracture in cross-section of cladding sample on 30CrMnSiA substrate. (a) Cross-section image; (b)--(d) partially enlarged images
表 130CrMnSiA合金粉末的化学成分
Table1. Chemical composition of 30CrMnSiA alloy powders
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庞小通, 龚群甫, 王志杰, 李铸国, 姚成武. 30CrMnSiA和30CrMnSiNi2A高强钢激光熔覆修复后的组织特征与力学性能[J]. 中国激光, 2020, 47(11): 1102002. Pang Xiaotong, Gong Qunfu, Wang Zhijie, Li Zhuguo, Yao Chengwu. Microstructures and Mechanical Properties of 30CrMnSiA and 30CrMnSiNi2A High-Strength Steels After Laser-Cladding Repair[J]. Chinese Journal of Lasers, 2020, 47(11): 1102002.
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