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不同中间层TLP连接TP304H和12Cr1MoV钢管接头的组织和性能 总被引:2,自引:0,他引:2
选用不同的FeNiCrSiB非晶箔合金作中间层,氩气保护,对12Cr1MoV和TP304H钢管进行了瞬时液相扩散(TLP)连接,分析了不同中间层接头的显微组织、力学性能.结果表明:工艺参数为1230℃和1240℃,保温3 min,压力4 MPa时,用FeNiCrSiB(B)和FeNiCrSiB(A)中间层连接的接头,其室温下的抗拉强度等于或超过基体,而FeNiCrSiB(C)中间层连接的接头性能最差. 相似文献
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基于旁路耦合电弧的铝钢MIG熔钎焊研究 总被引:6,自引:0,他引:6
实现铝钢良好连接的关键是有效控制焊接热输入,尽量降低中间层铝铁金属间化合物的厚度,一般认为中间层金属间化合物厚度小于10μm时铝钢接头质量良好。提出旁路耦合电弧熔钎焊方法,通过调节旁路电弧电流的大小来控制焊接热输入。在优化控制系统和工艺参数的基础上采用脉冲旁路耦合电弧焊方法将铝镁合金ER5356堆焊到304不锈钢板上,获得结合良好的焊缝。对焊接接头进行扫描电镜(Scanning electron microscope,SEM)、能量色散光谱仪(Energy dispersive spectrometry,EDS)分析,结果表明:铝与不锈钢焊接接头中间层金属间化合物平均厚度约为8μm,小于10μm的临界厚度;脉冲旁路耦合电弧焊方法能够实现铝钢的连接,是一种新型低成本低热输入电弧焊方法。 相似文献
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采用Al-Si-Cu系列中间层进行了纯铝和铝合金的非真空瞬间液相扩散连接。结果表明,纯铝TLP连接接头存在明显扩散区,虽然扩散区中央残留少量氧化物夹杂和空洞,但接头拉伸和弯曲性能均达到母材水平。铝镁合金TLP连接接头组织和成分连续分布,形成均匀化接头,但接头区仍残留少量氧化物夹杂和空洞;虽然接头弯曲角为90°,但满足SF6导电管的实际应用。 相似文献
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《机械制造与自动化》2015,(4)
介绍了瞬时液相扩散焊焊接原理,采用二相图对其焊接过程进行了模拟,讨论了瞬时液相扩散焊连接技术的优缺点。分析了焊接中间层的选择、焊接压力、焊接温度以及焊接时间等焊接因素对焊接品质的影响。综述了国内外瞬时液相连焊技术的理论研究、焊接影响因素研究以及焊接设备研究状况,并根据瞬时液相扩散焊研究现状对该技术的未来发展进行了展望。 相似文献
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Meng Hua Wei Guo Hang Wai Law John Kin Lim Ho 《The International Journal of Advanced Manufacturing Technology》2008,37(5-6):504-512
Aluminum matrix composite SiCp/A356 was welded by half-transient liquid Phase diffusion welding (HTLPDW) with a Cu interlayer. The effects of welding parameters
and interlayer thickness on the properties of the welded joint were investigated, and the optimal welding parameters were
subsequently put forward. The relationship between the tensile strength of the joint and the microstructure was studied by
analyzing the microstructure of joint using a scanning electron microscope (SEM) and an electron probe micro-analysis (EPMA).
Results confirmed the success of welding aluminum matrix composite SiCp/A356 utilizing HTLPDW method with a Cu interlayer. Shorter welding time was a prominent characteristic of HTLPDW as compared
with conventional transient liquid phase (TLP) diffusion welding. Furthermore, its welded joints had a tensile strength almost
72% of its parent matrix composites, evidently signifying the suitable application of half-transient liquid phase diffusion
welding in welding composite engineering structures. 相似文献
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研制的微波连接装置由微波源,单模谐振腔,红外光纤测温仪,焊件加压机构和真空及抽气系统组成。并在此装置上用不同中间层材料对氮化硅陶瓷进行了微波连接。 相似文献
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针对油田管道的焊接问题提出了一种全新的焊接方法:瞬时液相扩散焊(TLP),并研制出了石油管道瞬时液相扩散焊焊机。该焊机具有操作简单,易于携带,焊接效率高等特点,具有较高的市场应用价值。 相似文献
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W. F. Ding Q. Miao J. H. Xu Z. Z. Chen C. Y. Yang Y. C. Fu 《The International Journal of Advanced Manufacturing Technology》2013,68(1-4):249-255
In order to fabricate single-layer self-lubrication brazed cubic boron nitride (CBN) abrasive wheels, brazing experiments of graphite particles and AISI 1045 steel were carried out using Ag–Cu–Ti filler alloy. Optical microscope, scanning electron microscope, energy-dispersive spectroscopy, and X-ray diffraction were employed to characterize the microstructure and phase constitution of the brazing interface between graphite particles and Ag–Cu–Ti alloy. The formation mechanism was discussed. The results show that TiC resultants are formed via the diffusion behavior of Ti atoms and C atoms towards the joining interface. The chemical resultants of TiC have the granular shape at the early stage. Then, they grow across the joining interface between the graphite particle and Ag–Cu–Ti alloy. Finally, the continuous lamellar TiC compounds come into being around the graphite particle. Chemical joining of graphite particles and Ag–Cu–Ti filler alloy is accordingly realized. A comparative experiment displayed that the single-layer self-lubrication brazed CBN abrasive wheel has better performance than the conventional brazed counterpart. 相似文献
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介绍了真空钎焊技术的基本原理及其在气相色谱仪气路部件加工中的应用.重点阐述了焊接件的接头强度、搭边长度、接头公差、限流机制、零件定位等关键因素的设计要求,简单介绍了真空钎焊技术的焊接工艺,提出了一套可行的工艺流程. 相似文献
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M. Murtuja Husain M. Ghosh 《The International Journal of Advanced Manufacturing Technology》2013,66(9-12):1871-1877
Diffusion bonding of high-carbon steel was carried out in vacuum brazing furnace at temperature 900–1,050 °C for 0.5 h under uniaxial load using Ni foil interlayer. Microstructure of assemblies was studied along with effect of diffusion of chemical species in reaction zone and mechanical properties. Microstructure of substrate was changed from martensite to austenite at bonding temperature and subsequently to ferrite–pearlite during cooling to ambient temperature. Diffusion zone did not exhibit formation of any intermetallic compounds. Bond strength was governed by degree of solid solution hardening and contact area of mating surfaces depending on joining parameters. In this respect, maximum ultimate strength of ~532 MPa was obtained along with shear strength of ~792 MPa for the joint processed at 1,050 °C, which was higher than literature reports on martensitic steel. 相似文献
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由于陶瓷的线膨胀系数与金属的线膨胀系数相差很大,因此在通过焊接连接陶瓷与金属时,热作用势必会在接头区域会产生幅值较大的残余应力,进而降低接头的力学性能,严重时甚至会导致连接陶瓷接头的断裂。这使得陶瓷与金属的连接是一个广受关注但又未能得到很好解决的科学问题。采用非晶钎料实现ZrO2陶瓷与Ti-6Al-4V合金的钎焊连接,研究焊接工艺参数对接头的组织与性能的影响。结果表明接头界面组织结构为ZrO2陶瓷/Cu2Ti4O+(Ti,Zr)2Cu/TiO+Ti2O/CuTi2+(Ti,Zr)2Cu/ CuTi2/Ti-6Al-4V合金。钎焊温度、保温时间和冷却速度对界面组织结构有最大的影响,主要体现在反应层的厚度和脆性(Ti,Zr)2Cu相的变化。接头的剪切强度随钎焊温度、加热时间和冷却速度的增加而降低。最佳工艺参数为焊温度1 173 K,保温时间10 min,冷却速度5 K/min,其钎焊接头剪切强度可以达到165 MPa。 相似文献