Study on EB Welding Technology of CuNi90/10
-
摘要: 对10 mm厚CuNi90/10合金进行电子束焊接试验。液态金属表面张力较小,导致焊接工艺窗口较窄,较大的热输入将导致正面下凹,单面焊双面成形效果不如钛合金的;采用优化的参数可实现正面轻微下凹,同时保证背面成形基本良好。按照优化参数进行试板电子束焊接,并进行GTAW盖面。对焊接试板进行了射线检测和渗透检测,均满足NB/T 47013-2015的Ⅰ级标准;对焊接接头按照NB/T 47014-2011进行了力学、工艺性能测试,测试结果均满足标准要求。电子束焊接区域柱状晶特征明显,焊缝冲击性能优良,冲击功可达200 J以上,同时焊缝区硬度相比母材的有所下降。电子束焊接区域为典型的大深宽比形貌,焊缝区为枝晶α,热影响区为孪晶α;富镍α表现为较亮形貌,富铜α表现为较暗形貌。Abstract: The electron beam welding experiment is carried out on 10 mm thick CuNi90/10 plate. The small surface tension of the liquid metal results in the narrow welding process window, therefore, the large heat input would lead to the weld face concave. The effect of one-side welding with back formation for the CuNi90/10 alloy is not as good as that of the titanium alloy. The optimized parameters can obtain the weld face slightly concave and overall good back side appearance. RT and PT results of the weld with GTAW covering can meet grade I standard of NB/T 47013-2015, and the mechanical properties can meet the requirements of NB/T 47014-2011. The columnar crystal feature in the weld zone is obvious, the impact performance is good, with the impact energy reaching 200 J, and the hardness of the weld zone decreases compared with that of the base metal. The appearance of EB weld zone is characterized by large depth to width ratio. The microstructure of weld zone is dendrite α and that of the heat affected zone is twin α. The nickel-rich α phase is bright and the copper-rich α phase is dark under the optical microscope.
-
Keywords:
- CuNi90/10 /
- EB welding /
- joint microstructure /
- mechanical properties
-
-
[1] 陆菁, 武家艳. 铜镍合金的研究及其应用综述[J]. 有色金属材料与工程, 2020, 41(3):55-60. [2] 王建国, 曹福辛. BFe10-1-1白铜和双相不锈钢在海水管路中应用的综合性能分析[J]. 材料开发与应用, 2001, 16(3):1-5. [3] 周廉. 中国海洋工程材料发展战略咨询报告[M]. 北京:化学工业出版社, 2014. [4] MANSFELD F, LIU G, XIAO H, et al. The corrosion behavior of copper alloys, stainless steels and titanium in seawater[J]. Corrosion Science, 1994, 36(12):2063-2095.
[5] 李振, 周李军, 许海伦. 滨海核电站凝汽器防腐技术的应用分析[J]. 电站辅机, 2012, 33(3):17-22. [6] 林乐耘, 徐杰, 赵月红. 国产B10铜镍合金海水腐蚀行为研究[J]. 中国腐蚀与防护学报, 2000, 20(6):361-367. [7] 孙二举, 陶欢, 孙朋朋, 等. B10合金管材焊接裂纹原因分析[J]. 热加工工艺, 2019, 48(9):256-258. [8] 罗皓, 刘甲, 崔永杰, 等. BFe10-1-1合金PAW接头组织和性能研究[J]. 热加工工艺, 2019, 48(23):140-142. [9] 熊进辉, 耿永亮, 安飞鹏, 等. 厚板铜镍合金电子束焊的接头组织与力学性能[J]. 焊接技术, 2017, 46(1):12-14.
计量
- 文章访问数: 117
- HTML全文浏览量: 16
- PDF下载量: 18
下载:
