中国激光, 2017, 44 (4): 0402004, 网络出版: 2017-04-10  

保护气对微合金C-Mn钢激光焊接接头组织和性能的影响

Influence of Shielding Gas on Microstructure and Property of Laser Welded Joint of Microalloyed C-Mn Steel
作者单位
1 苏州大学沙钢钢铁学院, 江苏 苏州 215201
2 苏州大学机电工程学院, 江苏 苏州 215021
摘要
通过微合金C-Mn钢的焊接试验, 研究了不同保护气对激光焊接接头组织和性能的影响。结果表明, 在相同的激光焊接热输入条件下, N2、Ar、空气三种保护气焊接均可获得全熔透焊缝, 但N2气保护条件下焊缝区凹陷最为明显。焊缝区组织均以板条马氏体为主。空气环境下焊缝区形成少量针状铁素体, 夹杂物数量明显多于N2和Ar气保护下焊缝的, 且大尺寸的夹杂物比例较高。三种情况下, 焊接接头的平均显微硬度和强度均高于母材的, 但是空气环境下焊缝的平均硬度略小于N2或Ar气保护下焊缝的。
Abstract
The influence of different shielding gases on microstructure and property of laser welded joint is studied by the weld test of microalloyed C-Mn steel. The results show that, under the same condition of laser weld heat input, full-penetration weld seams can be obtained by three different shielding gases of N2, Ar and air, but the sags in the weld zone shielded by N2 are the most obvious. The microstructures of the weld zone are mainly lath martensite. In the weld seam formed in the air, there are a few acicular ferrites, the number of inclusions is more than that shielded by N2 and Ar, and the ratio of large scale inclusion is relatively high. In all three cases, the mean microhardness and tensile strength of the welded joint are higher than that of the base metal, while the mean microhardness of the weld seam in the air is smaller than that when shielded by N2 or Ar.
参考文献

[1] 朱红一. 安钢Nb微合金化高强度船体结构钢板的开发[J]. 特殊钢, 2009, 30(3): 50-51.

    Zhu Hongyi. Development of Nb microalloying high strength ship plate at Anyang steel[J]. Special Steel, 2009, 30(3): 50-51.

[2] 李鸿美, 曹建春, 孙力军, 等. 含铌微合金钢碳氮化物析出行为研究的现状及发展[J]. 材料导报, 2010, 24(9): 84-87.

    Li Hongmei, Cao Jianchun, Sun Lijun, et al. Current situation and development of Nb microalloyed steel carbonitride precipitation behavior[J]. Materials Review, 2010, 24(9): 84-87.

[3] Picon C A, Fernandes F A P, Rodrigues C A D, et al. Study of pitting corrosion mechanisms in sea water of supermartensitic stainless steels microalloyed with Nb and Ti[J]. Heat Treatment, 2010, 25(1): 25-29.

[4] 王晓南, 杜林秀, 邸洪双. 新型热轧纳米析出强化超高强汽车板的疲劳性能研究[J]. 机械工程学报, 2012, 48(22): 27-33.

    Wang Xiaonan, Du Linxiu, Di Hongshuang. Study on fatigue property of new type hot-rolled nano precipitation strengthening ultra-high strength automobile strip[J]. Journal of Mechanical Engineering, 2012, 48(22): 27-33.

[5] 吴华春, 李名尧, 蒋 启, 等. 国内外汽车钢板的发展概况研究[J]. 机械设计与制造, 2011(7): 254-256.

    Wu Huachun, Li Mingyao, Jiang Qi, et al. Survey study on development of automobile body sheet domestic and overseas[J]. Machinery Design & Manufacture, 2011(7): 254-256.

[6] Dawes C T. Laser welding: A practical guide[M]. Cambridge: Woodhead Publishing, 1992.

[7] Sun Z, Ion J C. Laser-welding of dissimilar metal combinations[J]. Journal of Materials Science, 1995, 30(17): 4205-4214.

[8] 李明星, 胡治华, 陈 凯. 保护气种类对镀锌板激光焊接性的影响[J]. 激光杂志, 2006, 27(6): 72-73.

    Li Mingxing, Hu Zhihua, Chen Kai. The effect of shielding gas type on laser weldability of galvanized steel[J]. Laser Journal, 2006, 27(6): 72-73.

[9] 尹 丰, 刘洪伟, 陶永顺. 保护气体对实心焊丝气体保护焊性能的影响[J]. 机械制造文摘(焊接分册), 2011(6): 37-40.

    Yin Feng, Liu Hongwei, Tao Yongshun. The influence of shielding gas composition on GMAW in performance[J]. Welding Digest of Machinery Manufacturing, 2011(6): 37-40.

[10] Sathiya P, Jaleel M Y A. Influence of shielding gas mixtures on bead profile and microstructural characteristics of super austenitic stainless steel weldments by laser welding[J]. The International Journal of Advanced Manufacturing Technology, 2010, 54(5): 525-535.

[11] Kah P, Martikainen J. Influence of shielding gases in the welding of metals[J]. The International Journal of Advanced Manufacturing Technology, 2013, 64(9): 1411-1421.

[12] 刘会杰. 焊接冶金与焊接性[M]. 北京: 机械工业出版社, 2007: 46-47.

[13] 肖荣诗, 梅汉华, 左铁钏. 辅助气体对CO2激光焊接光致等离子体屏蔽的影响[J]. 中国激光, 1998, 25(11): 1045-1050.

    Xiao Rongshi, Mei Hanhua, Zuo Tiechuan. Influence of assistant gases on the shielding thresholds of laser induced plasma during high power CO2 laser penetration welding[J]. Chinese J Lasers, 1998, 25(11): 1045-1050.

[14] Lee J L, Pan Y T. The formation of intragranular acicular ferrite in simulated heat-affected zone[J]. ISIJ International, 1995, 35(8): 1027-1031.

[15] 郑超超, 王学敏, 李书瑞, 等. 夹杂物对低碳钢焊接热影响区组织性能的影响[J]. 中国科学: 技术科学, 2012, 42(6): 662-671.

[16] Mills A R, Thewlis G, Whiteman J A. Nature of inclusions in steel weld metals and their influence on formation of acicular ferrite[J]. Materials Science and Technology, 1987, 3(12): 1051-1061.

[17] Yamamoto K, Hasegawa T, Takamura J. Effect of boron on intragranular ferrite formation in Ti-oxide bearing steels[J]. ISIJ International, 1996, 36(1): 80-86.

[18] Yamada T, Terasak H, Komizo Y. Relation between inclusion surface and acicular ferrite in low carbon alloy steel weld[J]. ISIJ International, 2009, 49(7): 1059-1062.

[19] Pavlina E J, van Tyne C J. Correlation of yield strength and tensile strength with hardness for steels[J]. Journal of Materials Engineering and Performance, 2008, 17(6): 888-893.

[20] 邹增大, 李亚江, 尹士科. 低合金调质高强度钢焊接及工程应用[M]. 北京: 化学工业出版社, 2000.

[21] 丛大志, 张效宁. 针状铁素体对SA738Gr.B钢埋弧焊焊缝金属性能影响的研究[J]. 热加工工艺, 2015, 44(21): 31-35.

    Cong Dazhi, Zhang Xiaoning. Research on effect of acicular ferrite on properties of SA738Gr.B steel with submerged arc welding[J]. Hot Working Technology, 2015, 44(21): 31-35.

曾盼林, 王晓南, 章顺虎, 张敏, 陈长军. 保护气对微合金C-Mn钢激光焊接接头组织和性能的影响[J]. 中国激光, 2017, 44(4): 0402004. Zeng Panlin, Wang Xiaonan, Zhang Shunhu, Zhang Min, Chen Changjun. Influence of Shielding Gas on Microstructure and Property of Laser Welded Joint of Microalloyed C-Mn Steel[J]. Chinese Journal of Lasers, 2017, 44(4): 0402004.

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