Effect of Deeply Cold Spinning on Properties of Ultra-Thin-Wall Large Radius-Thickness Ratio Nickel-Based Alloy Welded Cylinder
摘 要
对C-276镍基合金薄壁大径厚比焊接筒形件进行深度冷旋, 获得直径为 558 mm、壁厚为0.42 mm的超薄壁筒; 通过拉伸试验、显微组织观察、腐蚀性能试验等分析了深度冷旋对基体与焊缝力学性能、显微组织以及耐腐蚀性能的影响。结果表明: 冷旋减薄80%后, 基体晶粒明显细化, 取向性增强, 焊缝晶粒由粗长的鱼骨状枝晶变成小颗粒状晶粒; 冷旋减薄80%+1 150 ℃固溶退火后, 基体晶粒与冷旋前相近, 抗拉强度基本保持不变, 伸长率提高了23.28%, 而焊缝晶粒比基体的更加细化, 抗拉强度超过了基体的, 较冷旋前提高了10.11%, 伸长率提高了43.6%, 焊缝和热影响区的耐腐蚀性能得到了改善。
Abstract
The ultra-thin-wall cylinder, which owned radius of 558 mm and wall thickness of 0.42 mm, was obtained by deeply cold spinning on C-276 nickel-based alloy thin-wall large radius-thickness ratio welded cylinder. The effect of deeply cold spinning on mechanical properties, microstructure and corrosion resistance of matrix and weld seam by tensile test, microstructure observation and corrosion test. The results show that the grains in matrix were refined obviously and the orientation of grains was enhanced after cold spinning reduced by 80%, and the grains in weld seam transformed into small granular grains from coarse and long fishbone dendrite. After cold spinning reduced by 80% and solution annealing at 1 150 ℃, the grains in matrix were similar with those before cold spinning, tensile strength kept invariant and elongation raised by 23.28%. The grains in weld seam were smaller than those in matrix, tensile strength was higher than that of matrix and increased by 10.11% and elongation increased by 43.6%, the corrosion resistance of weld seam and heat affected zone were improved.
中图分类号 TG306
所属栏目
基金项目 国家重点基础研究发展计划项目(2009CB724307)
收稿日期 2010/6/30
修改稿日期 2011/1/16
网络出版日期
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备注何巨(1985-), 男, 湖南益阳人, 硕士研究生。
引用该论文: ZHANG Huai-liang,HE Ju,LI Xin-he,DENG Rui. Effect of Deeply Cold Spinning on Properties of Ultra-Thin-Wall Large Radius-Thickness Ratio Nickel-Based Alloy Welded Cylinder[J]. Materials for mechancial engineering, 2011, 35(6): 68~71
张怀亮,何巨,李新和,邓锐. 深度冷旋对超薄壁大径厚比镍基合金焊接筒性能的影响[J]. 机械工程材料, 2011, 35(6): 68~71
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参考文献
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【2】WLODZIMIERZ B, KRZYSZTOF M, ANDRZEJ K. Theoretical and practical aspects of the production of thin-walled tubes by the KOBO method[J].Journal of Materials Processing Technology, 2005, 169:44-53.
【3】WONG C C. Cold rotary forming of thin-wall component from flat-disc blank[J].Journal of Materials Processing Technology, 2008, 208:53-62.
【4】WONG C C, LINB J. Effects of roller path and geometry on the flow forming of solid cylindrical components[J].Journal of Materials Processing Technology, 2005, 167:344-353.
【5】DAVIDSON M J. An experimental study on the quality of flow-formed AA6061 tubes[J].Journal of Materials Processing Technology, 2008, 203:321-325.
【6】ROY M J, KLASSENB R J. Evolution of plastic strain during a flow forming process[J].Journal of Materials Processing Technology, 2009, 209:1018-1025.
【7】ZHAO Yun-hao. Study of nickel-based alloy thin tube spinning and properties[J].Journal of Metal Forming Technology, 2001, 26(1):33-35.
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