5005铝合金与1Cr18Ni9Ti的真空钎焊分析
Vacuum brazing 5005 aluminum alloy to 1Cr18Ni9Ti stainless steel
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摘要: 采用Al-Si-Mg钎料成功实现了5005铝合金与1Cr18Ni9Ti不锈钢的真空钎焊，借助扫描电镜、能谱分析仪和X射线衍射仪对焊后接头界面组织进行分析，同时对接头抗剪强度进行测试.结果表明，焊后接头界面结构从1Cr18Ni9Ti不锈钢侧到5005铝合金侧的界面组织依次为FeAl，FeAl3，FemAln+αAl.随着钎焊温度的升高或保温时间的延长，接头抗剪强度均呈现先升高后降低的变化趋势.当钎焊温度为580℃，保温时间为15 min时，接头抗剪强度达到最大值49 MPa.接头断裂形式受钎焊温度的影响，当钎焊温度较低时，接头断裂于铝合金侧氧化膜层及FemAln+αAl反应层；温度升高至580℃时，接头断裂于FemAln+αAl反应层中，接头抗剪强度最高.
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关键词:
- 5005铝合金 /
- 1Cr18Ni9Ti不锈钢 /
- 真空钎焊 /
- 界面组织 /
- 抗剪强度
Abstract: Vacuum brazing of 5005 aluminum alloy and 1Cr18Ni9Ti stainless steel was carried out with Al-Si-Mg filler foil. The interfacial microstructure and mechanical properties of the brazed joints were investigated by scanning electron microscope, energy dispersion spectrometer, x-ray diffractometer and tensile test, respectively. The experimental result showed that the typical interface structure of the joints was 1Cr18Ni9Ti stainless steel/FeAl/FeAl3/FemAln+αAl/5005 aluminum alloy. With brazing temperature and holding time,inereased the shear strength of the joints increased firstly and then decreased. Besides, mechanical property tests showed thatwhen the brazing temperature was 580℃ and the holding time was15 min, the maximum shear strength of joints was 49 MPa. Moreover, the fracture form of the joints was mainly affected by the brazing temperature. When the brazing temperature was low, the joints fractured in the oxide layer and FemAln+αAl layer. When the temperature was high, the joints fractured in FemAln+αAl layer completely. -
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[1] Rathod M J, Kutsuna M. Joining of aluminium alloy 5052 and low-carbon steel bylaser roll welding[J]. Welding Journal, 2004, 83(1):16-26. [2] 王希靖, 申志康, 张忠科. 铝和镀锌钢板的搅拌摩擦焊搭接分析[J]. 焊接学报, 2011, 32(12):97-100. Wang Xijing, Shen Zhikang, Zhang Zhongke. Study of friction-stir-welded lap joint of aluminum and zinc-coated steel[J]. Transactions of the China Welding Institution, 2011, 32(12):97-100. [3] 傅莉, 毛信孚, 史学芳. LF6防锈铝与HR-2抗氢不锈钢摩擦焊接[J]. 焊接学报, 2003, 24(1):9-14. Fu Li, Mao Xinfu, Shi Xuefang. Friction welding of LF6 anti-rust aluminum and HR-2 anti-hydrogen stainless steel[J]. Transactions of the China Welding Institution, 2003, 24(1):9-14. [4] 钱乙余, 董占贵, 石素勤, 等. 铝接触钎焊的成缝行为[J]. 焊接学报, 2001, 22(5):13-16. Qian Yiyu, Dong Zhangui, Shi Suqin, et al. behavior of aluminum contact reactive brazing[J]. Transactions of the China Welding Institution, 2001, 22(5):13-16. [5] 吴铭方, 司乃潮, 陈健. 铝/镀银层/钢的扩散钎焊及界面化合物的生长行为[J]. 中国有色金属学报, 2010, 20(6):1209-1213. Wu Mingfang, Si Naichao, Chen Jian. Diffusion brazing of Al/Ag plating layer/steel and growth behavior of interface compound[J]. The Chinese Journal of Nonferrous Metals, 2010, 20(6):1209-1213. [6] 马海军, 李亚江, 王娟. Al/Cu异种有色金属的真空钎焊工艺[J]. 焊接技术, 2007, 36(1):38-86. Ma Haijun, Li Yajiang, Wang Juan. Study on Al/Cu dissimilar nonferrous metals vacuum brazing technology[J]. Transactions of the China Welding Institution, 2007, 36(1):38-86. [7] Rabin B H, Wright R N. Reaction processing of iron aluminides[J]. Materials Science and Engineering A, 1992, 153(1):706-711. [8] 王兴庆. 反应烧结制取铁铝系金属间化合物的分析[D]. 长沙:中南大学, 2002.
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