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Laser Welding Applications with Low Power
For a lap weld joining of AISI 416 stainless steel cap to a AISI 310 stainless steel body, CO2 Laser with a 575 watts beam out put was used associated with a 127 mm focal length lens and a helium gas shield. An enhanced pulse mode, 100 pulses per second, with 4 milli second pulses was used to achieve penetration of 1.65 mm at welding speed of 762 mm per minute. Power was ramped down towards the end of the weld to prevent possible fracturing due to rapid cooling. There is very little debris or spatter in the vicinity and it fulfilled the requirement for a cosmetic as well as a deep penetrating weld. The power levels in this category is less than 1 kW of laser power output.
Imperfect Frame - truss: Imperfec t Frame An Imperfect frame is one that does not satisfies relation between numbers of members and number of joints given by equation
In Naphtha Hydrotreating Unit, does feed/effluent heat exchangers require passivation to avoid polythionic acid stress corrosion cracking.
For the angle of projection when the range is equal to distance through which the particle would have fallen in order to acquire a velocity equal to the velocity of projection will
In designing rotating space stations to give for artificial-gravity environments, one of the constraints that must be considered is motion sickness. Studies have shown that the neg
Q. Design Wellheads and Wellpads? Hydrocarbon-producing wellheads and wellpads shall be located in open, well ventilated areas with as much segregation from other critical equi
diagram
Pole core and pole shoe The pole cores are made of steel laminations that are insulated from each other and riveted together. Every pole core has a pole shoe having a curved su
The average heat transfer co efficient for flow of 100 o C air over a flat plate is calculated by observing the temperature time history of a 3mm thick copper slab exposed 100 o
(Rigid body acceleration) A tank of water accelerates down an icy frictionless ramp of angle . What angle ( ) does the water make with the horizontal at equilibrium?
V icke r ' s Hardness Test: This test is alike the Brinell test but uses different indenter. A square based pyramid of cone angle 136 ° is used. The applied load can be 5,
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