| |
|
 Sec. 1 |
Introduction |
| |
|
| Sec. 2 |
Historical
outlines |
| 2.1 |
Discovery of Plasma as an energy
converter |
| 2.1 |
First applications of plasma arc
in the metallic constructions |
| |
|
| Sec. 3 |
Fundamentals on
plasma arc |
| 3.0 |
Physics of electric arcs |
| 3.1 |
Phenomena of gas ionisation |
| 3.2 |
Physics of plasmas |
| 3.3 |
A review on features and
parameters governing the plasma state |
| |
|
| Sec. 4 |
Outlines on
Plasma arc tecnologies |
| 4.1 |
The PAC process (Plasma Arc
Cutting) |
| 4.2 |
The PAW process (Plasma Arc
Welding) |
| 4.3 |
The PTA process (Plasma Tranferred
Arc) |
| 4.4 |
The PS process (Plasma Spraying) |
| |
|
| Sec. 5 |
The PPAW
process (Powder Plasma Arc Welding) |
| 5.1 |
The basic equipment for PPAW
process |
| 5.2 |
The main parameters of PPAW
process |
| 5.2.1 |
Pilot arc characteristics |
| 5.2.2 |
Transferred arc characteristics |
| 5.2.3 |
Metallic Powder characteristics |
| 5.2.4 |
Plasma and shielding gas
characteristics |
| 5.3 |
Typical applications of PPAW
process |
| 5.4 |
Metallic powders as filler
material |
| 5.4.1 |
Outlook on main methos for powder
production |
| 5.4.2 |
Choice of metallic powders with
antiwear behaviour |
| 5.4.3 |
Importance of a proper sieving of
powders |
| 5.5 |
Benefits of PPAW process in the
welding technogy |
| 5.5.1 |
Quick and easy update of the
existing production chain |
| 5.5.2 |
High production rates |
| 5.5.3 |
Metallic Powders as Filler
material |
| 5.5.4 |
Easy automatisation of the
complete process |
| 5.6 |
Weak spots of this welding
technology |
| 5.6.1 |
High-tech applications or
technological innovations |
| 5.6.2 |
Easy-to-find powders with chemical
and grain size properties tailored to the
application |
| |
|
| Sec. 6 |
EXPERIMENTAL
SETUP |
| |
|
| Sec. 7 |
DESCRIPTION OF
PLASMA TEAM EQUIPMENT FOR PPAW PROCESS |
| |
|
| Sec. 8 |
OPTIMISATION OF
THE WELDING PARAMETERS |
| 8.1 |
Welding tests - Session Nr. 1 |
| 8.2 |
Welding tests - Session Nr. 2 |
| 8.3 |
Welding tests - Session Nr. 3 |
| 8.4 |
Welding tests - Session Nr. 4 |
| 8.5 |
Welding tests - Session Nr. 5 |
| 8.6 |
Welding tests - Session Nr. 6 |
| 8.7 |
Welding tests - Session Nr. 7 |
| 8.8 |
Welding tests - Session Nr. 8 |
| 8.9 |
Synthesis of the experimental data |
| 8.9.1 |
First layer - No filler material |
| 8.9.2 |
First layer - With filler material |
| 8.9.3 |
Second layer - With filler
material |
| 8.9.4 |
Comparison of the two welding
techniques |
| |
|
| Sec. 9 |
MACRO- AND
MICROGRAPHS OF THE MOST REPRESENTATIVE SAMPLES |
| 9.1 |
First layer - No filler material |
| 9.2 |
First layer - With filler material |
| 9.3 |
First layer - No filler material /
Second layer - With filler material |
| 9.4 |
First and second layer with filler
material |
| 9.5 |
First layer - No filler material /
Second layer - With filler material but
incomplete welding |
| 9.6 |
First layer - No filler / Second
and Third layer - With filler material for
complete welding |
| |
|
| Sec. 10 |
FINAL
CONCLUSIONS |
| |
|
| Sec. 11 |
REFERENCES |
| |
|
| |
ACNOWLEDGEMENTS |
| |
|
| |
Total Pages: 347 |
| |
Total Figures/Graphs/Photos : 244 |
| |
Total Tables : 152 |
