耐腐蚀性镍基箔带钎料钎焊不锈钢接头性能
Properties of 316L stainless steel joints brazed with corrosion resistant nickel-based filler metal
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摘要: 采用新型耐腐蚀性镍基箔带钎料BNi685对316L不锈钢进行真空钎焊，研究了钎焊间隙对钎缝组织及力学性能的影响，对比了新型BNi685钎料钎焊接头与商用BNi2钎料，BNi685膏状钎焊接头的耐腐蚀性. 结果表明，随着钎焊间隙的增加，钎焊接头的抗拉强度逐渐降低，钎缝中心的显微硬度增加. 钎焊间隙为50 μm时，接头平均抗拉强度为244 MPa，钎缝组织主要由Ni2.9Cr0.7Fe0.36，CrNiP，Cr3P，Ni5Cr3Si相组成. 随着钎焊间隙增加，钎缝中心的CrNiP，Cr3，Ni5Cr3Si相增多，Ni2.9Cr0.7Fe0.36相减少. BNi685钎料钎焊接头的耐腐蚀性优于BNi2和BNi685膏状钎料钎焊接头，在EGR冷却器制造领域具有较大的应用潜力.Abstract: The brazing of 316L stainless steel was carried out by using Nickel based filler metal BNi685 foil. The effect of brazing clearance on the microstructure and mechanical properties of brazed joint was studied. The corrosion resistance of joints brazed with the new BNi685 foil, commercial BNi2 and BNi685 paste filler metals were also compared. The results show that with the increase of gap clearance, the tensile strength of the brazed joint decreases gradually, and the microhardness at the center of the joint increases. When the brazing clearance is 50 μm, the joint achieved a maximum tensile strength of 244 MPa. The microstructure of the brazing seam is mainly composed of Ni2.9Cr0.7Fe0.36 ductile phase and a small amount of FeNiCr(P) brittle phase. With the increase of gap clearance, the FeNiCr(P) brittle phase at the center of the brazing seam increases, and the Ni2.9Cr0.7Fe0.36 ductile phase decreases. The corrosion resistance of the BNi685 brazed joint is superior to that of the BNi2 and BNi685 paste brazed joint. BNi685 filler metal has a strong application potential for EGR coolers fabrication.
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Keywords:
- vacuum brazing /
- nickel-based filler /
- gap clearance /
- corrosion resistance
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[1] 阎超.板翅式不锈钢油冷器真空钎焊新型工艺技术试验研究[D].哈尔滨:哈尔滨工业大学, 2014. [2] 郑岩松.纯铜钎料低真空钎焊不锈钢油冷器试验研究[D].哈尔滨:哈尔滨工业大学, 2011. [3] Hartmann T, Nuetzel D. New amorphous brazing foils for exhaust gas application[C]//Proceedings of the 4th International Brazing and Soldering Conference, 2009:110-117. [4] Hartmann T, Nuetzel D. Chromium containing amorphous brazing foils and their resistance to automotive exhaust gas condensate[C]//Proceedings of the 5th International Brazing and Soldering Conference, IBSC. 2012:394-401. [5] 陈伟婧.不锈钢EGR冷却器钎焊结构断裂失效实验研究[D].哈尔滨:哈尔滨工业大学, 2008. [6] 舒双文,周帼彦,陈兴. 316L板翅结构钎焊接头力学性能试验[J].焊接学报, 2016, 37(12):83-86 Shu Shuangwen, Zhou Yiyan, Chen Xing. Mechanical test of brazed joints of 316L plate-fin structure[J]. Transactions of the China Welding Institution, 2016, 37(12):83-86 [7] 殷祚炷,孙凤莲.铜铝钎焊接头腐蚀机理分析[J].焊接学报, 2017, 38(10):121-124 Yin Zhuozhu, Sun Fenglian. Analysis of corrosion mechanism of Copper-Aluminum brazed joints[J]. Transactions of the China Welding Institution, 2017, 38(10):121-124 [8] 王星星,李帅,彭进,等.基于镀锡银钎料钎焊304不锈钢接头的腐蚀行为[J].焊接学报, 2018, 39(4):63-66 Wang Xingxing, Li Shuai, Peng Jin, et al. Corrosion behavior of 304 stainless steel joints based on tin-plated silver solder brazing[J]. Transactions of the China Welding Institution, 2018, 39(4):63-66 [9] Sheet V D A T. 230-214 resistance of metallic materials to condensate corrosion in exhaust gas-carrying components[S]. Verband der Automobilindustrie:Berlin, Germany, 2010. [10] Xiong W, Selleby M, Chen Q, et al. Phase equilibria and thermodynamic properties in the Fe-Cr system[J]. Critical Reviews in Critical Reviews in Solid State and Materials Sciences, 2010, 35(2):125-152. -
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