Welding Defects
- ISBN/EAN
- 9788854858541
- Editore
- Aracne
- Formato
- Brossura
- Anno
- 2013
- Pagine
- 168
Disponibile
20,00 €
This manual aims like a simple but effective tool, useful to the identification and assessment of weld defects. This work is therefore indicated to the technical offices, production departments, welding inspectors and those in charge of inspecting welded structures. The structure purely functional and simplified of this manual has the purpose of facilitating the reader in identifying and understanding of weld defects. In particular, will be analyzed and categorized many welding defects, followed by images, drawings and technical evaluations, result of years of experience of specialists in the world of welded structures.
Maggiori Informazioni
| Autore | Preto Moreno |
|---|---|
| Editore | Aracne |
| Anno | 2013 |
| Tipologia | Libro |
| Num. Collana | 0 |
| Lingua | Inglese |
| Indice | Preface Introduction to Welding…………………………………………………………………1 Explanatory comments……………………………………………….3 Chamfer………………………………………………………………...4 Welding processes…………………………………………………….6 Cracking 7 Hot cracks………………………………………………………………8 Solidification cracks…………………………………………………..8 Shrinkage cracks………………………………………………………8 Crater cracks…………………………………………………………10 Liquation cracks …………………………………………………….17 Cold cracks…………………………………………………………...20 Hydrogen cracks……………………………………………………..20 Brittle crack…………………………………………………………..26 Fatigue cracks………………………………………………………..32 Heat treatment cracks……………………………………………….38 Lamellar tearing……………………………………………………..41 Cavity 45 Gas cavity…………………………………………………………..…45 Pore……………………………………………………………………45 Uniformly distributed porosity……………………………………..46 Cluster of porosity…………………………………………………...46 Linear porosity……………………………………………………….47 Elongated cavity……………………………………………………..47 Worm-hole…………………………………………………………….48 Surface pore…………………………………………………………..48Shrinkage cavity 55 Interdendritic shrinkage…………………………………………….55 Crater cavity………………………………………………………….57 Final shrinkage cavity………………………………………………60 Cavity visible only under the microscope………………………...64 Solid inclusions 65 Slag inclusion………………………………………………………...65 Flux inclusion………………………………………………………...67 Oxide inclusion……………………………………………………….67 Oxide film……………………………………………………………..67 Metallic inclusions…………………………………………………..68 Lack of fusion and penetration 73 Lack of fusion…………………………………………………………73 Lack of sidewall fusion……………………………………………...73 Lack of fusion between passes……………………………………..73 Lack of root fusion…………………………………………………...74 Lack of penetration…………………………………………………..79 Lack of root penetration…………………………………………….79 Shape and dimensional defects 84 Continuous undercut………………………………………………...84 Intermittent undercut………………………………………………..89 Root undercut………………………………………………………...89 Undercut between passes…………………………………………...92 Localized undercut…………………………………………………..94 Excess weld metal……………………………………………………96 Incorrect weld toe…………………………………………………..100 Excessive convexity………………………………………………...101 Excessive penetration……………………………………………...104Localized excessive penetration………………………………….104 Continuous excessive penetration………………………………..104 Melt through………………………………………………………...105 Overlap………………………………………………………………108 Overlap of the last pass……………………………………………108 Overlap of the root pass…………………………………………...109 Misalignment………………………………………………………..112 Misalignment between plates……………………………………..112 Misalignment between pipes………………………………………112 Angular misalignment……………………………………………..115 Sagging………………………………………………………………117 Sagging in horizontal position……………………………………117 Sagging in flat or overhead position…………………………….118 Sagging in a fillet weld…………………………………………….118 Sagging at the edge of the weld…………………………………..119 Burn-through………………………………………………………..122 Incompletely filled groove…………………………………………124 Excessive asymmetry of a fillet weld…………………………….126 Irregular width……………………………………………………...128 Irregular surface……………………………………………………130 Root concavity………………………………………………………133 Poor restart………………………………………………………….135 Excessive weld thickness…………………………………………..137 Excessive weld width………………………………………………137 Insufficient throat height…………………………………………..138 Excessive throat height…………………………………………….138 Other imperfections 141 Stray arc……………………………………………………………..141 Spatter………………………………………………………………..144 Tungsten spatter…………………………………………………….147 Torn surface…………………………………………………………147 Grinding mark………………………………………………………151 Chipping mark………………………………………………………152 Excessive grinding………………………………………………….152 Footnote index………………………………………………………155 |
| Disponibilità | Disponibilità: 3-5 gg |
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