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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.
Airport Pavement: Airport pavements can be: (a) Flexible, and (b) Rigid (cement concrete). Since cement concrete pavements have transverse and longitudi
Q= In an investigation of the thermodynamic properties of alpha-manganese,the following heat contents determined H 700 - H 298 = 2895 cal/g-atm H 1000 - H 298 = 5450 cal
what is the difference betwen proof stress and rupture stress?
A competitor in a hill-climb event finds during practice that his car becomes airborne at a particular point on the hill. Shortly after landing the lowest point in the car just co
A 2 Kg mass is suspended in a box by a spring as shown in figure. The box is put on a platform having vibration y = 0.8 sin 6t cm. calculate absolute amplitude of mass
In Grey Cast Iron, carbon is present in ------------form while in white cast iron, it is found in ----------- form.
Isolated System: In an Isolated system, neither energy nor masses are permitted to cross the boundary. The system has constant mass and energy. No such system exists physicall
In most hardware stores, you can find what has known as a Heat Gun. Hold the heat gun about 6 inches away from the acrylic you intend on bending say the bumper on a car. They are p
Advantages of welding process Welding results in a good saving of material and reduced labour content of production. Low manufacturing costs. Dependability of the me
Seasonal-Component Analysis: A food processor uses a moving average to forecast next month's demand. Actual demand data for the past few months is available as depicted in the
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