Welding & Materials - Advanced Welding & Materials Knowledge

Process Annealing — Eliminating Cold Work: A low-temperature heat treatment used to eliminate all or part of the effect of cold working in steels.

Cast Iron devided in to four types : White cast iron Fe3 C + pearlite Hard, brittle Shows a “white” crystalline fractured surface Excellent wear resistance

Non Iron based alloys• Wide range of properties, structures, andstrengthening mechanisms.• Selecting the right material to fit theapplication. Aluminum Alloys Second most plentiful metal

The properties of steels, determined bydispersion strengthening, depend on theamount, size, shape, and distribution ofcementite (Fe3C). These factors are controlled by alloying andheat treatment.

In general steel construction welding process used is usually electric arc welding with covered electrode, electric arc welding with CO2 gas shield and submerged electric arc

Where the throat size is the same on either side of the joint (see Figure 1) To determine the required fillet weld size for

Expendable Molds Metals casting ?Mould – made of sand, plaster, ceramics and similar materials (mixed with various binders or bonding agents). ?Material are refractories - 

Definition: Planar (Two Dimensional) discontinuities produced by thetearing of parent or weld metal.Weld metal cracking canoccur in either the plastic condition (hot shortness) or