中国激光, 2018, 45 (5): 0502007, 网络出版: 2018-05-02 复制并引用该论文  本文已被引 2 次  被引通知

图 & 表

图 1. 激光焊接头的显微硬度检测示意图

Fig. 1. Schematic of micro-hardness measuring of laser welded joints

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图 2. 激光焊接头拉伸试样示意图

Fig. 2. Schematic of tensile specimen of laser welded joints

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图 3. 焊接接头宏观形貌及焊缝不同位置处的显微组织形貌。(a)激光焊接头宏观形貌;(b)焊缝上部显微组织;(c)焊缝中部柱状晶区;(d)焊缝底部显微组织;(e)图3(b)的局部放大图;(f)图3(c)的局部放大图;(g)图3(d)的局部放大图

Fig. 3. Macro morphologies of laser welded joints and microstructures at different locations of weld. (a) Macro morphology of laser welded joints; (b) microstructure at the top of weld; (c) columnar dendritic structure in the middle of weld; (d) microstructure at the bottom of weld; (e) local magnification of Fig. 3 (b); (f) local magnification of Fig. 3 (c); (g) local magnification of Fig. 3 (d)

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图 4. 拉伸试样的应力应变曲线

Fig. 4. Stress-strain curve of tensile specimen

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图 5. 拉伸试样的断口形貌图。(a)低倍放大;(b)高倍放大

Fig. 5. Fracture morphologies of tensile specimen. (a) Low magnification; (b) high magnification

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图 6. 焊接接头的显微硬度分布

Fig. 6. Micro-hardness distribution of welded joints

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表 1316LN奥氏体不锈钢的化学成分(质量分数,%)

Table1. Chemical compositions of 316LN austenitic stainless steels (mass fraction, %)

Element C Si Mn Cr Ni Mo N P S Co B Nb Fe Content 0.017 0.45 1.58 16.74 12.86 2.05 0.14 0.019 <0.001 0.025 <0.0005 <0.02 Bal.

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表 2焊接速度对焊缝表面成形和横截面形貌的影响

Table2. Effect of welding speed on surface appearances and cross sections of welds

Welding speed /(m·min-1) Surface appearance Cross section 1.2 1.8 2.0

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表 3离焦量对焊缝表面成形和横截面形貌的影响

Table3. Effect of defocus on surface appearances and cross sections of welds

Defocusing /mm Surface appearance Cross section +10 +5 0 -3 -6 -10 -20 -25 -30

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表 4焊接速度和激光功率对焊缝表面成形和横截面形貌的影响

Table4. Effects of welding speed and laser power on surface appearances and cross sections of welds

Laser power /kW Welding speed /(m·min-1) Surface appearance Cross section 20 1.5 20 1.8 20 2.0 20 2.4 20 2.7 20 3.0 19 1.5 19 1.8 19 2.0

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信纪军, 方超, 宋云涛, 卫靖, 吴杰峰, 戴文华. 20 mm厚316LN不锈钢板的超高功率光纤激光自熔焊[J]. 中国激光, 2018, 45(5): 0502007. Xin Jijun, Fang Chao, Song Yuntao, Wei Jing, Wu Jiefeng, Dai Wenhua. Autogenous Laser Welding of 20-mm-Thick 316LN Stainless Steel Plate by Ultra High Power Fiber Lasers[J]. Chinese Journal of Lasers, 2018, 45(5): 0502007.