Welding of dissimilar metals and coated metals

At present, about 160001 silks are produced in Germany. Among them, in addition to the transportation grid, they have been used to replace steel wires and copper wires, especially as welding wires and reinforcing wires. Welding wire has been successfully applied in automobile lightweight structure.

200061361 The arc discharge during the arc welding of the halogenating agent for alloy Q. The possible reason for the deionization of the arc discharge peripheral area of ​​the Ti alloy with the halogenating agent Ar is the temperature drop due to the endothermic reaction in this area. Welding of 42 ginseng 3 dissimilar metals and coated metals 20006137 Welding of dissimilar stainless steel clad plates with reduced pressure oil transfer line and inlet of decompression tower Cai Hongwei welding. 2000,6.4041 20006138 Welding of copper-steel clad pipe joints Ai Jianling studied the influence of different welding currents on the welding performance of copper-steel clad pipe joints. For large heat exchangers, arc welding is more stable and reliable without preheating, and square wave pulses and angular wave pulses are more ideal waveforms. Under the condition of pulse current, a larger peak current can be selected. It avoids the uniformity of the arc at the starting position during DC argon arc welding. The square wave and angular wave pulse welding processes are suitable for manual welding and automatic welding. The reasonable process parameters of square wave pulse welding are: 20006139 hammer crusher disc 45 steel and 350 elbow, cast steel welding 20006140 infiltration welding method to prepare 7 functionally graded materials Zhou Zhangjian Journal of Metals. 2000, 366.655 658 can be prepared by the infiltration welding method. 1. The whole process includes the preparation of the gradient shell framework, infiltration, 1 and hot press welding. The preparation of the gradient w skeleton is the key. The volume fraction content of the pore-forming agent is between 570, and the Jia skeleton prepared by using powders with different particle sizes in each layer has good gradient pores. At the same time, the microstructure of the 7-gradient transition layer was observed, and the thermal shock resistance of the functionally graded material was tested. The results show that the final product has good thermal shock resistance. 32 parameters 7 welding inspection and equipment 20006141 urea synthesis tower welding quality same type multi-film ray detection method Liu Dezhen nondestructive testing. 2000, 226.

20006142 ray through! Application of Type Fillet Welding Wu Guozhong often encountered some workpieces that required flaw detection of Type 7 fillet welds in nondestructive testing. In practice, he found out a radiographic inspection. The method to test the quality of such welds shows that this method is suitable for the radiographic inspection of 7-type fillet welds with web thickness less than or equal to 2 times the height of the welding feet; The burial depth of certain defects; 3 The bolt load is used to compact the gasket, and the axial thrust generated by the tube side pressure is transferred from the tube box cover to the cylinder; 4 For some workpieces, the web and the When the wings are not perpendicular to each other, in order to ensure the detection accuracy, the shooting angle of the person needs to be corrected. 6 20006143 Spherical tank assembly welding seam 7-ray flaw detection several questions 26144 Friction welding joint residual stress and the effect of tissue on the ultrasonic spectrum Yang Siqian, non-destructive testing. 2000, 225.

An ultrasonic water immersion transmission method with a frequency of 15 Hz was used to test the 45 steel friction welded joint. Through harmonic analysis of the ultrasonic signals before and after stress relief annealing, the law of the residual stress and microstructure of the weld and heat affected zone on the ultrasonic spectrum was found. It is pointed out that the residual stress of the friction welding joint has caused a very obvious attenuation of the ultrasonic harmonic addressing in the 410th century, and reduced the harmonic frequency corresponding to the highest spectral line of the frequency band; Fixed correspondence. therefore. Use the cut frequency band

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