钎缝间隙对316L不锈钢真空钎焊接头组织和硬度的影响
Effect of Brazing Clearance on Microstructure and Hardness of Vacuum Brazing Joint of 316L Stainless Steel
摘 要
采用BNi-2+40%BNi-5镍基混合钎料对316L不锈钢进行三种纤缝间隙的真空钎焊,通过光学显微镜、扫描电镜、X射线能谱仪及硬度计等研究了三种钎焊接头的显微组织、钎缝元素分布以及钎缝显微硬度.结果表明:316L不锈钢的钎焊接头主要由固溶体、连续共晶和金属间化合物及网状组织组成;随着钎缝间隙的减小,钎焊接头中金属间化合物的含量逐渐减小,接头元素、硬度分布更加均匀;当钎缝间隙为30 μm时,接头组织基本为固溶体,综合性能最好.
真空钎焊
镍基钎料
钎缝间隙
stainless steel
vacuum brazing
nickel-based filler
brazing clearance
Abstract
Vacuum brazing of 316L stainless steel with BNi-2+40%BNi-5 nickel-based mixed filler metal was carried out to obtain the joints with 3 kinds of brazing clearances.Microstructure of solder joints,element distribution and microhardness of the joints were studied by means of optical microscopy,scanning electron microscopy,energy dispersive X-ray spectroscopy and microhardness testing.The results show that the joints were composed of solid solutions continuous,eutectic compounds and meshwork compounds.The amounts of intermetallic compounds decreased,the joint composition and hardness distribution were more uniform with the decrease of brazing clearance.Continuous microstructure of the joint with 30 μm brazing clearance was mainly solid solution,and the comprehensive properties were the best.
中图分类号 TG454
所属栏目 试验研究
基金项目 上海市科委攻关项目(071005120);上海市教委重点学科项目(J51402)
收稿日期 2009/1/9
修改稿日期 2009/8/4
网络出版日期
作者单位点击查看
备注石昆(1985-),男,河南郑州人,硕士研究生.
引用该论文: SHI Kun,YU Zhi-shui. Effect of Brazing Clearance on Microstructure and Hardness of Vacuum Brazing Joint of 316L Stainless Steel[J]. Materials for mechancial engineering, 2010, 34(2): 15～17
石昆,于治水. 钎缝间隙对316L不锈钢真空钎焊接头组织和硬度的影响[J]. 机械工程材料, 2010, 34(2): 15～17
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参考文献
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【2】张启运,庄鸿寿.钎焊手册[M].北京:机械工业出版社,1998.
【3】陈建民.BNi-2真空钎焊不锈钢钎缝的相变规律研究[J].石油大学学报,2000,24(5):80-83.
【4】印有胜.镍基钎料的钎缝脆性及其影响因素[J].焊接学报,1997,18(3):134-140.
【5】刘海侠.钎焊间隙对镍基钎料接头强度的影响[J].河北软件职业技术学院学报,2007,9(1):69-72.
【6】PHILIPS N R,LEVI C G, EVANS A G.Mechanisms of microstructure evolution in an austenitic stainless steel bond generated using a quaternary braze alloy[J].Metallurgical and Materials Transactions A,2008,39(1):142-149.
【7】YU Y H,LAI M O.Effects of gap filler and brazing temperature on fracture and fatigue of wide gap-joints brazeds[J].Journal of Materials Science,1995,30(8):2101-2107.
【8】陈建民.不锈钢接头的宽间隙真空钎焊[J].石油大学学报,1999,23(6):53-56.
【9】WU X W,CHNADEL R S,SEOW H P,et al.Wide gap brazing of stainless steel to nickel-based superalloy[J].Journal of Materials Processing Technology,2001,113(1):215-221.
【10】陈建民,朱长福.真空钎焊不锈钢接头的钎缝组织和相组成特征[J].石油大学学报,1999,23(2):66-68.
【11】OU C L,SHIUE R K.Microstructural evolution of brazing 422 stainless steel using the BNi-3 braze alloy[J].Journal of Materials Science,2003,38(11):37-46.
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