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

What can a valve do?  It can prevent flow (on/off), allow variable control of the flow and provide a safe working environment. What sort of questions should we be asking when selec

Find speed for two hours with HSS tools Find speed for two hours tool life for dry machining of free cutting mild steel with HSS tool. Solution From Table 3, a value o

Reduce expressions for the hydrostatic center and force of pressure in case of an inclined plane surface submerged in a fluid.

(a) Mention the needs to be satisfied by power transmission system of vehicles. (b) What is an overdrive? Explain its principle of operation and advantages.

Washing: Station 1 Loading bay START Station 2 Hot Chemical wash Station 3 Running Cold bath Station 4 Hot C

The Power Method is a classic numerical algorithm for determining the largest eigenvalue and eigenvector associated with a matrix A. Write a matlab function that returns the larges

With the help of a neat diagram illustrate the working of Gasifier combined cycle power plant. Describe with the help of neat diagram the working of Pressurised water reactor nu

Evaluate the reactions at hinge and roller support: Q: A Force P = 5000N is applied at centre C of beam AB of length 5m as shown in figure given below. Find the reactio

The cockpit of a jet plane flying at a speed of 1200 km/hr is to be cooled by simple air cooling system. The cockpit is to be maintained at 25 0 C and pressure in the cockpit is 1