Welding Fundamentals


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Table of Contents

Welding Fundamentals

The Electric Arc

Parts of the Arc

Arc Current Flow

Factors Affecting the Arc

Magnetic fields

Arc Energy

Metal transfer

Transfer Mechanisms

Arc Force

The Weld Pool

Factors affecting weld pool flow

Weld Pool and Environment

Solution of Gas

Dissolved Gases

Effects of Dissolved Gases

Hydrogen Embrittlement

Hydrogen Embrittlement

Fluxes for MMA electrodes

Weld Pool Solidification

Weldpool solidification

Weld Pool Shape

Author: Steve Bull

Email: s.j.bull@ncl.ac.uk

Home Page: http://www.staff.ncl.ac.uk/s.j.bull