A comprehensive protective structure with rigidity and flexibility was put forward and designed in view of the quality and safety problems for the double vertical explosive welding of large titanium/steel cladding pla...A comprehensive protective structure with rigidity and flexibility was put forward and designed in view of the quality and safety problems for the double vertical explosive welding of large titanium/steel cladding plate.The movement speed and displacement of the protective structure was calculated by establishing its physics model.The dynamics and stabilization properties were analyzed,and the protective structure parameters were optimized and devised.The comprehensive protective structure,which is composed of rigidity unit and flexibility wall,can bear the impact of detonation wave and the high-speed movement of the cladding plate.There are no damage and deformation in the protective structure and the cladding plate.The protective structure can be used many times.The bonding rate of the Ti/steel plate obtained was nearly 100%,and there is no deformation,surface cracks,and big wave and micro-defects.Therefore,the protective problems of the double vertical explosive welding can be solved effectively by the protective structure.展开更多
The processing area is reduced by double vertical explosive welding and rolling. Those micro defects are avoided such as " fusion" and " jet pile" in the bonding zone of large Ti plate of explosive...The processing area is reduced by double vertical explosive welding and rolling. Those micro defects are avoided such as " fusion" and " jet pile" in the bonding zone of large Ti plate of explosive welding. So the quality and welding ratio of interface are improved. To solve the technical problem of narrow weldability window of Ti,a minimum critical detonation velocity explosive was invented to enlarge the window after double vertical explosive welding experiment and optimization. A comprehensive protective structure made up of rigid protective plates and flexible protective walls was designed to restrict the movement of cladding plates in double vertical explosive welding effectively and protect the cladding plates from damage. The interface microstructure showed that the bonding interfaces were periodically micro and small wavy and there are no micro defects such as melt metal and swirl.展开更多
In this study, a new R-δf-type welding window on charge parameters is constructed by determining the boundary conditions of the explosive ratio. The R-δf-type welding window synthetically considers the explosive pro...In this study, a new R-δf-type welding window on charge parameters is constructed by determining the boundary conditions of the explosive ratio. The R-δf-type welding window synthetically considers the explosive properties and material properties, and can quickly determine the explosive charge at different welding materials with different thickness. In order to test the practicability and accuracy of the R-δf-type welding window, 410S stainless steel and Q345R low alloy steel plates were explosively welded using 15 mm charge determined by the new window. Microstructures of the bonded sections were examined and then shear tests were carried out on the bonded specimens. Microstructural examination showed the joint interface was transformed from micro wavy to small wavy appearance without microstructure defects. Shear tests results showed inter inacial shear strength was much higher than that of the national first grade standard. So the R-δf-type welding window has strong practicability and accuracy and is helpful to the practical production and application of explosive welding composite materials.展开更多
基金Project was supported by the National Natural Science Foundation of China(Grant No.51541112).
文摘A comprehensive protective structure with rigidity and flexibility was put forward and designed in view of the quality and safety problems for the double vertical explosive welding of large titanium/steel cladding plate.The movement speed and displacement of the protective structure was calculated by establishing its physics model.The dynamics and stabilization properties were analyzed,and the protective structure parameters were optimized and devised.The comprehensive protective structure,which is composed of rigidity unit and flexibility wall,can bear the impact of detonation wave and the high-speed movement of the cladding plate.There are no damage and deformation in the protective structure and the cladding plate.The protective structure can be used many times.The bonding rate of the Ti/steel plate obtained was nearly 100%,and there is no deformation,surface cracks,and big wave and micro-defects.Therefore,the protective problems of the double vertical explosive welding can be solved effectively by the protective structure.
基金supported by the National Natural Science Foundation of China(Grant No.51541112)
文摘The processing area is reduced by double vertical explosive welding and rolling. Those micro defects are avoided such as " fusion" and " jet pile" in the bonding zone of large Ti plate of explosive welding. So the quality and welding ratio of interface are improved. To solve the technical problem of narrow weldability window of Ti,a minimum critical detonation velocity explosive was invented to enlarge the window after double vertical explosive welding experiment and optimization. A comprehensive protective structure made up of rigid protective plates and flexible protective walls was designed to restrict the movement of cladding plates in double vertical explosive welding effectively and protect the cladding plates from damage. The interface microstructure showed that the bonding interfaces were periodically micro and small wavy and there are no micro defects such as melt metal and swirl.
基金supported by the National Natural Science Foundation of China(Grant No.51541112)
文摘In this study, a new R-δf-type welding window on charge parameters is constructed by determining the boundary conditions of the explosive ratio. The R-δf-type welding window synthetically considers the explosive properties and material properties, and can quickly determine the explosive charge at different welding materials with different thickness. In order to test the practicability and accuracy of the R-δf-type welding window, 410S stainless steel and Q345R low alloy steel plates were explosively welded using 15 mm charge determined by the new window. Microstructures of the bonded sections were examined and then shear tests were carried out on the bonded specimens. Microstructural examination showed the joint interface was transformed from micro wavy to small wavy appearance without microstructure defects. Shear tests results showed inter inacial shear strength was much higher than that of the national first grade standard. So the R-δf-type welding window has strong practicability and accuracy and is helpful to the practical production and application of explosive welding composite materials.
