Hard-
Surfacing,
Building
Fusion
Welding
Carbon
Welding Non-Ferrous Metals
Heating
& Heat
Treating
Braze
Welding
Welding Cast Iron Welding Ferrous Metals
Brazing
&
Soldering
Equipment
Set-Up
Operation
Equipment
For
OXY-Acet
Structure
of
Steel
Mechanical
Properties
of Metals
Oxygen
&
Acetylene
OXY-Acet
Flame
Physical
Properties
of Metals
How Steels
Are
Classified
Expansion
&
Contraction
Prep
For
Welding
OXY-Acet
Welding
& Cutting
Safety
Practices
Manual
Cutting
Oxygen
Cutting By
Machine
Appendices
Testing
&
Inspecting
1 INTRODUCTION Although oxyfuel cutting is generally viewed as a mature uncomplicated process, those who work with it realize all too well that making it perform properly is no simple matter. Experienced operators can achieve a level of cut quality that rivals a machined surface, and do it in a fraction of the time and at a fraction of the cost of hard tooling. Consistently reaching that quality, however, requires an understanding of the many factors that are at work, their direct effect on quality, and their interaction with each other. For many operators that can only be achieved through years of hands-on experience. The information presented in this booklet is intended to reduce the learning time for less experienced operators and new trainees by providing an understanding of the ”hows” and ”whys” of oxyfuel cutting. We believe even the most experienced operators will benefit as well. We will show how some die hard habits, which are viewed by some to improve cut quality and performance, actually do the opposite. Supervisors who spent much of their careers burning, possess much process know-how, although we believe they too will benefit from this program. Unfortunately those supervisors who weren’t burners cannot afford to spend the time to learn how now. This program is for them also. We will divide the process into several key elements and study their effect on quality and their interaction with each other. By understanding these fundamental relationships, supervisors can reason the causes of various defects and then take corrective action to prevent them.