Thermit welding, Mechanical Engineering

Thermit Welding


This process utilises the intense heat developed during the reaction between iron oxide and aluminium. When a mixture of three parts of iron oxide and one part of  aluminium by weight is locally burnt with a special ignition powder a vigorous reaction takes place which proceeds rapidly through the mass, resulting in the formation of aluminium oxide and iron and a considerable amount of heat. The heat is sufficient  to melt iron and oxide slag. In carrying out thermit welding the thermit mixture is placed in a refractory crucible above the pieces to be welded. The molten metal from reaction is guided to the joint to be welded by a sand mould, which is fastened around the work. By virtue of its superheat, the thermit metal melts a portion of base metal with which it comes in contact. This process is ideal for welding rails of railway tracks.

Posted Date: 9/13/2012 8:12:40 AM | Location : United States







Related Discussions:- Thermit welding, Assignment Help, Ask Question on Thermit welding, Get Answer, Expert's Help, Thermit welding Discussions

Write discussion on Thermit welding
Your posts are moderated
Related Questions
Compute the maximum bending moment: A simply supported beam of 7 m length carries point loads 2 kN, 4 kN and 6 kN at distances of 1 m, 2 m & 4 m from the fixed end respectivel

Scrapper: Scrappers are used to scrap gasket or other such materials from flat or irregular surface. Scrappers of several sizes are shown in Figure. Figure : Scrapper

RESISTANCE WELDING The types are as follows: Resistance Spot Welding Resistance Seam Welding Projection Welding Flash Butt Welding Flash Butt Welding Stit

Find the minimum weight to keep equilibrium: A belt supports the two weights W 1 an d W 2 over a pulley as shown in the figure given below. If W 1 = 1000N, fi

Are there jobs in the field of Mechanical Engineering that incorporate the outdoors? I am an outdoorsman for one, and a tradesman at heart and am currently a Mechanical engineering

Find speed of dynamo shaft: Q: W ith the help of belt an engine running at 200rpm drives line shaft. The Diameter of the pulley on engine is 80cm and the diameter of the pul

Lead Acid Battery :  The lead acid type of battery is generally used in all types of two wheelers. It consists of six cells and the rating of the battery is 12 V-2.5 Ah and 12 V-5

In a nuclear power plant saturated steam at 30 bar enters a h.p. turbine and expands isentrophically to a pressure at which its quality is 0.841. At this pressure the steam is pass

what is the difference between point function and path function?

Find out their common velocity: An aeroplane weighing 40 kN horizontally moves with a velocity of 20 m/sec (72 kmph, that means 72 km per hour). A helicopter of weight 20 kN i