Presentation on theme: "EXPLOSIVE WELDING OF LARGE BRASS/STEEL SHEETS I.V. Denisov, O.L. Pervukhina, L.B. Pervukhin (Russia) Institute of Structural Macrokinetics and Materials."— Presentation transcript:
EXPLOSIVE WELDING OF LARGE BRASS/STEEL SHEETS I.V. Denisov, O.L. Pervukhina, L.B. Pervukhin (Russia) Institute of Structural Macrokinetics and Materials Science RAS (ISMAN), Academician Osipyan str., 8, Chernogolovka, Moscow Region, 142432, RUSSIA
Influence of parameters on the seam quality Boundary conditions of the connection with explosion welding metals r –the mass ratio of explosive charge the weight of the plate D - detonation velocity γ - the angle of impact VкVк 3 100(14+86)×1100×2100 mm
The experimental results brass L63 (14 mm thick) Cladding sheet - brass L63 Main sheet - steel 09G2C 4 On a sheet of brass has gray coating On a sheet of steel has a yellow coating
The structure of the porous layer on the brass surface (length greater than 1 m after the explosion welding) 5 The surface of the porous layer A cross section of the porous layer on the brass surface of
V к, м/с γ, ° Parameters of the shock- compressed gas Zone length shock- compressed gas, m Exposure time of shock- compressed gas, s Pressure p 1, Па TemperatureТ 1, °К l (1м) l (2м) t (1м) t (2м) 25009 6,7×10 6 27180,0940,144 37,6×10 -6 57×10 -6 320010 11,1×10 6 43510,0910,14 28×10 -6 44×10 -6 400013 18,3×10 6 70070,090,137 22×10 -6 34×10 -6 42001622,2×10 6 84500,0890,13719,8×10 -6 30×10 -6 Parameters of the shock-compressed gas at various modes of explosion welding for Brass + Steel 11 The brass surface becomes warmed-up above the melting point of brass and boiling point of Zn. The moving shocked gas entrains Zn vapor, the particles of fused Cu, Fe and also their oxides. Due to gravity-assisted separation, the Zn vapor and its oxides go upward while the fine particles of melted brass and steel, downward. Upon contact with the metal surface, Zn and its oxides get deposited onto the steel surface while melted brass particles, on the steel surface.
12 Ready billet for tube plates The results of experimental testing of welding explosion bimetal brass + steel (L63 +09 G2S) 100 (14 +86) × 1100 × 2300 mm Experiment