Heat Treatment of Tools

General purpose tools like chisel, hammer, file, punch, lathe tools etc. are manufactured by forging. These tools are normalized immediately after forging to restore their original structure and to relieve stresses and strains set up while forging. Hardening is carried out to induce hardness at...
Continue reading »

Iron-Carbon Equilibrium Diagram

Alloys of the Iron carbon system are of the most vital importance to the modern industry due to their extensive, versatile applications. The Iron carbon system provides the most prominent example of heat treatment and property alteration based on the transformation from one form to...
Continue reading »

Methods of Case Hardening

Various types of surface hardening or case hardening processes are. (a)       Carburising (b)       Cyaniding (c)        Nitriding Carburising The formation of a high carbon case is carried out by heating the steel in contact with a carbonaceous material. Carbon diffuses on to the surface layers of...
Continue reading »

Composition and Types Soft Solders

The solders generally used in industry are alloys of tin, lead and zinc. Tin-lead solders are used to join most of the metals as they have good corrosion resistance to most of the metals. Sometimes silver, cadmium, antimony and bismuth are also added to solders....
Continue reading »

Flux Used in Soft Soldering

The operation of brazing, soldering and welding has brought out the use of fluxes in service. Flux is a chemical substance, which is made for cleaning the surface of the job and preventing oxidation in operations, such as welding, soldering and brazing. It is rather...
Continue reading »

Types of Soldering Iron

In most cases of soft soldering process, direct application of heat is avoided as it is difficult to control. It is to avoid damage to electrical connections, melting away of thin sheets and damage to other equipment where application of direct heat can cause distortion....
Continue reading »