Electric Slag Welding – Paton

In this post, we will see the book Electric Slag Welding by B. Paton.

About the book

Electric slag welding is a fundamentally new method of permanently joining metals. It has been developed and put to practical use by the Paton Electric Welding Institute of the Ukrainian Academy of Sciences in collaboration with the Engineering Works at Novo-Kramatorsk and the Krasny Kotelshchik Boiler- Making Factory at Taganrog, both of which are leading plants in the field.
As distinct from other fusion welding methods, the electric slag process depends on the lioaL generated by the passage of an electric current from the welding rod (electrode) to the workpiece through the molten pool of a high-resistance conductive flux, or slag. Hence its name—electric slag process.
Submerged arc welding has proved less efficient on thicknesses over 50 or 60 mm than on lighter sections. This is because of the difficulty and, at limes, impossibility of making well-shaped welds with strong arcs in the downhand position in a single pass. Therefore, heavy-gauge plate has to be bevelled prior to welding and welded in many passes—which is out of pace with modern heavy engineering practice.
Electric slag welding is a big step forward, as this process, coupled with weld moulding, has rendered possible the single-pass welding of plate of practically unlimited thickness.
The obvious advantages, both technical and economic, that the electric slag process possesses in comparison with other methods and processes of fusion welding of heavy sections have appealed to welding people in some Western countries. In 1959, equipment for electric slag welding went into production in Britain and West Germany.
In this book, the authors have sought to cover all the latest achievements in the science and art of electric slag welding.

The book was translated from Russian was published in  by Publishers.

Original scan by Digital Library of India project. Credits to original uploader.

You can get the book here.

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Contents

 

FOREWORD? 5

Chapter I. ELECTRIC SLAG WELDING 1

1. Definitions 7
2. Classification 12
3. Features 17
4. Applications 19

Chapter II. WELD FORMATION IN ELECTRIC SLAG WELDING 22

1. Heat Input and Distribution 22
2. Propagation of Heat in the Parent Metal 26
3. Welding Procedures and Their Effect on Weld Shape and Dimensions 29
4. Structure of Weld Metal in Electric Slag Welding 48

Chapter III. METALLURGY OF ELECTRIC SLAG WELDING 63

1. Reactions of Manganese and Silicon 64
2. Reactions of Chromium 71
3. Oxidation of Carbon 71
4. Reactions of Phosphorus and Sulphur 72
5. Effect of Welding Conditions on the Rate of Metallurgical Reactions 74
6. Effect of Type of Current aud Polarity on Metallurgical Reactions 77
7. Behaviour of Gases in Electric Slag Welding 81
8. Fluxes for Electric Slag Welding 83
9. Electrodes for Electric Slag Welding 87

Chapter IV. TECHNIQUE OF ELECTRIC SLAG WELDING AND HARDFACING 90

1. Types of Joints and Welds 90
2. Edge Preparation and Fit-up 95
3. Technique for Straight Seams 100
4. Technique for Circumferential Seams 107
5. Consumable Electrode-guide Technique 111
6. Welding Technique with Large-size Flectrodes 116
7. Hard-facing by the Electric Slag Process 118
8. Electric Slag Welding in Repair of Thick-walled Articles and Machine Parts 124
9, Defects in Electric Slag Welds 128
10. Weld Inspection and Testing 139

Chapter V. DISTORTIONS AND THE!R CONTROL IN ELECTRIC SLAG WELDING 142

1. Distortions in Flat-plate Structures Joined by Straigh Seams 142
2. Distortions in Corner Joints 146
3. Distortions in Welded Frames lens 146
4. Distortions In Slag-welded High-pressure High-temperature Boilers 148
5. Distortions in Circumferential Seams 150

Chapter VI. EQUIPMENT FOR ELECTRIC SLAG WELDING 153

1. Features of Design 153
3. Track-riding Electric Slag Welding 155
3. Trackless Electric Slag Welding Equipment 170
4. Walking Magnet Welding Sets 175
5. Sets for Electric Slag Circumferential Seams 117
6. Equipment for Electric Slag Welding with Plate and Rod Electrodes 181
7. Sets for Welding with Consumable Electrode Guides 184
8. Electric Slag Welding Outfits 185

Chapter VII. POWER SOURCES AND AUTOMATIC CONTROL IN ELECTRIC SLAG WELDING 200

1. Power Sources for Electric Slag Welding 200
2. Automatic Control of Electric Slag Welding 205

Chapter VIII. WELDING PROCEDURES FOR CARBON AND ALLOY STRUCTURAL STEELS 217

1. Killed Carbon Steels 217
2. Rimmed Low-carbon Steels 234
3. Boiler Carbon Steels 231
4. Medium-alloy Steels 247
5. Austenitic Steels and Heat-resistant Alloys 267
6. Titanium 282
T. Cast Iron 287
8. Hard Facing by the Electric Slag Process 289

Chapter IX. ELECTRIC SLAG WELDING OF HIGII-PRESSURE VESSELS 299

1. Types of Welded Vessels 299
2. Slag-welded Vessels from Roll-formed Plate 303
3. Slag-welded Vessels from Pressed Plate 307
4. Heat Treatment of Thick-walled Boiler Drums and High-pressure Vessels 313
5 Distortions of Boilers Due to Heat Treatment in Gas-fired Furnaces and Their Control 315
6. Economic Gain and Technical Advantages 317

Chapter X. TYPICAL APPLICATIONS OF ELECTRIC SLAG WELDING 320

1. Rolled-welded Structures 321
2. Cast-welded Structures 332
3. Forged-welded Structures 344
4. Composite Structures from Plate, Forgings and Castings 351
5. Electric Slag Welding of Heavy-gauge Reinforcing Bars 359

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