— Brazing is defined as a group of joining processes wherein coalescence is produced by heating to a suitable temperature and by using a filler metal having a liquidus above 800°F (427°C) and below the solidus of the base metals. The ...

CLASSIFICATION OF HEAT-TREATMENT PROCESSES Various heat treatment processes can be classified as 1. Annealing (a) Stress-relief annealing. (b)  Process annealing (c)  Spheroidising (annealing) (d) Full annealing. 2. Normalising                                          3. Hardening (by quenching) 4. Tempering                                            5. Martempering 6. Austempering                                       7. Maraging

 DEFINITION —  Heat treatment is a stage in the fabrication of structures and is often forgotten; but it has perhaps more wide-reaching and important ramifications than many of the other stages in the fabrication of structures or components. —  Heat treatment may ...

 DEVELOPMENTS IN METALLOGRAPHY — Many new techniques have been developed over the last decade that extend significantly the metallographer's ability to investigate the microstructure of metals and alloys. — At the same time, developments in advanced engineering materials have exposed certain inherent ...

PHOSPHORUS PRINT — Phosphorus printing is carried out in order to find the amount and distribution of phosphorus in steel.  — The steel surface is prepared as in sulphur printing. — Bromide paper is soaked in a solution of ammonium molybdate — five ...

SULPHUR PRINT Introduction Sulphur printing is a method to detect sulphur in steel. This method also gives a permanent record of the distribution of sulphur in steel. While sulphur is not always as harmful as is sometimes supposed, a sulphur print is ...

STUDY OF MICROSTRUCTURES — Metallography is the science of evaluating metal structures and is an important field of metallurgy. — The metallographer must prepare the specimen to obtain a true image of the structure and then exactingly evaluate the structure. — Examination and ...