激光与光电子学进展, 2019, 56 (21): 211402, 网络出版: 2019-11-02
激光表面重熔蠕墨铸铁气门座微观特性分析和裂纹抑制研究 
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Microscopic Characteristic Analysis and Crack Suppression of Laser-Surface Remelting of Vermicular-Graphite Cast-Iron Valve Seats
图 & 表
图 3. 激光重熔层中部区域显微组织。(a) V =5 mm/s;(b) V =3 mm/s;(c) V =1 mm/s
Fig. 3. Microstructures of central region of laser remelting layer. (a) V =5 mm/s; (b) V =3 mm/s; (c) V =1 mm/s
图 4. 激光重熔层与相变硬化层交界处的显微组织。(a) V =5 mm/s;(b) V =3 mm/s;(c) V =1 mm/s
Fig. 4. Microstructures at interface between laser remelting layer and phase-transformation hardening layer. (a) V =5 mm/s; (b) V =3 mm/s; (c) V =1 mm/s
图 6. 变激光参数下的裂纹数。(a)变激光扫描速度;(b)变激光功率
Fig. 6. Crack numbers under variable laser parameters. (a) Variable laser scanning velocities; (b) variable laser powers
表 1蠕墨铸铁RuT300的化学成分(质量分数,%)
Table1. Chemical compositions of vermicular-graphite cast-iron RuT300 (mass fraction, %)
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庞铭, 谭雯丹. 激光表面重熔蠕墨铸铁气门座微观特性分析和裂纹抑制研究[J]. 激光与光电子学进展, 2019, 56(21): 211402. Ming Pang, Wendan Tan. Microscopic Characteristic Analysis and Crack Suppression of Laser-Surface Remelting of Vermicular-Graphite Cast-Iron Valve Seats[J]. Laser & Optoelectronics Progress, 2019, 56(21): 211402.
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