Metal transfer in co2 welding, Mechanical Engineering

Assignment Help:

METAL TRANSFER IN CO2 WELDING

In CO2 welding, two distinct types of metal transfers are identified viz. short circuiting transfer and free flight globular transfer.

Short Circuit Transfer: When the welding voltage and the current are low, the mode of metal transfer would be of short circuiting type. In short circuiting mode, metal transfer occurs from tip of the wire electrode to the job whenever the wire tip touches the weld pool. The arc is extinguished during the short circuit period and is re-ignited after the short circuit is cleared. Short circuiting transfer is used for joining thin sheets, welding out of position and root pass welding of tubes and pipes.

Free Flight Transfer:  When the arc voltage and current are high, the metal droplets are transferred non axially as large globules and this is called non axial free flight transfer. The non axial free flight transfer produces deep penetration. Hence, this mode of transfer is used for welding thick sections in down hand and horizontal positions.


Related Discussions:- Metal transfer in co2 welding

Calculate the greatest stress - plate, Calculate the greatest stress - plat...

Calculate the greatest stress - plate: A rectangular plate 10 mm thick within a hole of 50 mm diameter drilled on this is as shown in Figure 10. This is subjected to axial pul

Calculate the weight of body and the coefficient of friction, Calculate the...

Calculate the weight of body and the coefficient of friction: Q: Bodies resting on rough horizontal plane required pull of 24N inclined at 30º to the plane just to move it. I

What do you understand by inversion of mechanism, (a) What do you understan...

(a) What do you understand by Inversion of Mechanism ? Describe in detail the following : (i) Crank and Lever mechanism (ii) Double crank Mechanism (b) What are the condit

Som, a steel bar is

a steel bar is

Find the stress developed in copper and steel, A steel rod of 20 mm diamete...

A steel rod of 20 mm diameter passes centrally through a copper tube of 50 mm external diameter and 40 mm internal diameter. The tube is closed at each end by rigid plates of negli

Calculate the shear stress , A hollow circular shaft has an internal diamet...

A hollow circular shaft has an internal diameter of 48 mm and an external diameter of 54 mm. Calculate the shear stress produced at the outer and inner surfaces of the shaft when t

Classification of power sources according to construction, CLASSIFICATION O...

CLASSIFICATION OF POWER SOURCES ACCORDING TO CONSTRUCTION & DESIGN To give the desired output a power source may be constructed with different components. Therefore, a classifi

Electrodes- inconel electrodes, Inconel Electrodes These electrodes are u...

Inconel Electrodes These electrodes are used in the industries, like petrochemical, fertiliser, etc. The weld composition contain small percentage of alloying elements like V, Mo

Kinetic or dynamic friction, Kineti c (Dynamic) Friction: When appli...

Kineti c (Dynamic) Friction: When applied force exceeds limiting friction the body starts moving over the other body and the friction of resistance experienced by the body a

Evaluate the stream function, Evaluate the stream function at point (2, 3) ...

Evaluate the stream function at point (2, 3) for a two dimensional flow given by U = 5x 3           v = - 15x 2 y Evaluate the velocity potential function for a two dimension

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd