TAILIEUCHUNG - submerged arc welding 2012

Tham khảo sách 'submerged arc welding 2012', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | m __ MillAF I vllllVrl JJI DIVIE IB 3 E Lr ADP 1AIEI rMIU 2 li w w E L Lr 1111 L PREFACE The material contained within is current technical information on the application of the Submerged Arc Welding SAW process. It goes without saying that new up-to-date technical data is changing continuously. However basic information is always beneficial and it is hoped that this book will be helpful in that respect. All recommendations in this book are approximate values. We suggest that any welds or weldments be tested to assure that all codes and specifications are met. MILLER Electric Mfg. Co. TABLE OF CONTENTS PAGE General .1 Equipment Power Constant Constant Alternating Current .2 Wire Semiautomatic Submerged Flux Arc Gun Electrical Gunsand Flux Consumables Mechanically Particle Wire and Flux Identification .10 Preparing to Weld Joint Joint Bead Flux Preheat and Interpass Making the Weld Sharp Wire Steel Wool Scratch Molten Pool Retract Wire High Frequency Amperage Wire Feed Travel Speed. .19 Electrode Electrode Welding Hints Circumferential Fillet Welds. . .22 Lap Weld Defects and Troubleshooting .23 Special Cladding .24 Stainless Steel .24 COPYRIGHT 1982 MILLER ELECTRIC MFG. co. Rev. 11 85 SUBMERGED ARC WELDING GENERAL Submerged Arc Welding SAW or Sub Arc as it s generally referred to is a unique welding process because there is no visible evidence that a weld is being made. The welding zone is completely shielded by a blanket of granular flux. Exposed arc eye protection is not normally used since the arc should be completely covered. The welding operator must however

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