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Numerical simulation of copper based filler metal droplets spreading under arc brazing YU Zhi-shui(于治水)1, LI Rui-feng(李瑞峰)2, QI Kai(祁 凯)2, ZHOU Fang-ming(周方明)2 (1. College of Materials...) Abstract: The spreading behavior of copper filler metal droplets under arc brazing was studied by numerical simulation method using Surface Evolver software. The mathematical model in which arc......
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current of 70 A. It can be seen that Fe-Si compounds nucleate at the interface and grow in wavelike form into the copper filler zone. Then compounds with ‘sprout-like’ form grow from the top of the wavelike interface, and these compounds grow larger and deeper into the copper filler zone with increasing arcing time. Later these compounds are fragmented by the arc stirring force into block-like form......
J. Cent. South Univ. (2020) 27: 3103-3117 DOI: https://doi.org/10.1007/s11771-020-4532-6 Dynamic disaster control of backfill mining under thick magmatic rock in one side goaf: A case study XUE Yan... special geological mining conditions of overlying thick magmatic rock (TMR), a three-dimensional numerical model of a panel of one side goaf in Yangliu coal mine with double-yield backfill material......
Trans. Nonferrous Met. Soc. China 22(2012) s639-s644 Microstructures of brazing zone between titanium alloy and stainless steel using various filler metals Taeshin CHUNG1, Jungsoo KIM2, Jeongseok..., but at the conditions using titanium and nickel based filler metals had brazed zone between titanium alloy and stainless steel. However, titanium alloy was eroded during brazing using titanium based filler metals......
Article ID: 1003-6326(2005)06-1297-06 High temperature brazing of diamond tools YAO Zheng-jun(姚正军)1, SU Hong-hua(苏宏华)1, FU Yu-can(傅玉灿)2, XU Hong-jun(徐鸿钧)2 (1. College of Materials Science..., Nanjing 210016, China) Abstract: A new brazing technique of diamond was developed. Using this new technique optimum chemical and metallurgical bonding between the diamond grits and the carbon......
) and metal inert gas(MIG) brazing process using copper based filler. The results show that the joint zone hardness is higher than that of the base material or copper filler from the microhardness... at an arc current of 70 A, and the zero spot is the interface adjacent to the copper filler side. It can be seen that the micohardness is highest at the interface, and the interface zone hardness is higher......
reaction layer. Pd together with Si participated in the interfacial reactions and formed Pd2Si and Pd3Si phases. Furthermore, in this reaction zone, the residual brazing alloy became Ni-rich and Pd... in the reactions and formed Pd2Si and Pd3Si phases[13-15], and in this reaction zone, the residual brazing alloy became Ni-rich and Pd-depleted. Obviously, under the same heating condition of 1 250 ℃, 30......
roller with high velocity to form a foil due to down quenching. The schematic diagram of injection casting using single copper roller is shown in Fig.1. To get the good quality of amorphous brazing... Preparation of Ti-based amorphous brazing alloy ZOU Jia-sheng(邹家生)1,2, JIANG Zhi-guo(蒋志国)1, XU Zhi-rong(许志荣)1, CHEN Guang(陈 光)2 1. Provincial Key Lab of Advanced Welding......
of the brazing seam zone is higher than those of the substrates, the interface layers on the Cu side have the maximum hardness value. 3) The middle brazing seam zone encompasses the Zn- and Al-rich phases when... to various microstructure features. The Zn- and Al-rich phases exist in the middle brazing seam regions. However, two interface layers, CuZn3 and Al2Cu are formed on the Cu side when the Al content......