AWS BRH-2007 Brazing Handbook (Fifth Edition)《第5版钎焊手册》.pdf

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1、i Brazing Handbook Fifth Edition Supersedes Brazing Handbook, 4th Edition, 1991 Prepared by the American Welding Society (AWS) C3 Committee on Brazing and Soldering Under the Direction of the AWS Technical Activities Committee Approved by the AWS Board of Directors 550 N.W. LeJeune Road, Miami, FL 3

2、3126ii International Standard Book Number: 978-0-87171-046-8 American Welding Society 550 N.W. LeJeune Road, Miami, FL 33126 2007 by American Welding Society All rights reserved Printed in the United States of America Photocopy Rights. No portion of this publication may be reproduced, stored in a re

3、trieval system, or transmitted in any form, including mechanical, photocopying, recording, or otherwise, without the prior written permission of the copyright owner. Authorization to photocopy items for internal, personal, or educational classroom use only or the internal, per- sonal, or educational

4、 classroom use only of specific clients is granted by the American Welding Society provided that the appropriate fee is paid to the Copyright Clearance Center, 222 Rosewood Drive, Danvers, MA 01923; tel: (978) 750-8400; Internet: . The information and data presented in the Brazing Handbook are inten

5、ded for informational purposes only. Rea- sonable care is exercised in the compilation and publication of the Brazing Handbook to ensure the authenticity of the contents. However, no representation is made as to the accuracy, reliability, or completeness of this informa- tion, and an independent, su

6、bstantiating investigation of the information should be undertaken by the user. The information contained in the Brazing Handbook shall not be construed as a grant of any right of manufacture, sale, use, or reproduction in connection with any method, process, apparatus, product, composition, or syst

7、em, which is covered by patent, copyright, or trademark. Also, it shall not be construed as a defense against any liabil- ity for such infringement. Whether the use of any information in the Brazing Handbook would result in an infringement of any patent, copyright, or trademark is a determination to

8、 be made by the user.iii Dedications Robert L. Peaslee“Mr. Brazing” Mr. Bob Peaslee is recognized for his tireless effort and generous contributions in making this new edition not only possible but technically sound. Bob questioned every person and paragraph written to ensure the technical accuracy

9、of its content. The legacy of Mr. Peaslee and his “fingerprints” are found throughout the book. This handbook has been instrumental in transferring his years of experience and knowledge into a practical experience for all of us. Cynthia L. Jenney This edition of the Brazing Handbook is dedicated to

10、the memory of Cynthia Jenney in recogni- tion of her tireless efforts on this project. Cynthia took this book to heart. Besides her duties as committee secretary, Cynthia coordinated the chapter contributions as well as provided valuable suggestions and encouragement to the individual authors. She p

11、ut in countless hours editing the text as well as organizing the artwork that came from numerous sources around the country. The C3 committee will be forever grateful to Cynthia for all of her hard work on the handbook, for serving as a wonderful secretary, and for simply being a very dear friend to

12、 all of our committee members. John J. Stephens This handbook is also dedicated to the memory of C3 committee member John J. Stephens, Ph.D., of Sandia National Laboratories (Albuquerque, NM) who passed away during its completion. John was a world-recognized leader in the areas of metal-ceramic braz

13、ing and filler metal properties. He freely offered his expertise, not only through his contributions to this handbook, but also in the many efforts undertaken by the committee. Johns upbeat attitude and willingness to help provided an inspiration to everyone in this industry who had the opportunity

14、to work with him.v Personnel AWS C3 Committee on Brazing and Soldering P. T. Vianco, Chair Sandia National Laboratories R. W. Smith, Vice Chair Materials Resources International S. N. Borrero, Secretary American Welding Society G. L. Alexy The Prince their contribution has been invaluable! The AWS H

15、andbook Committee members have risen to this challenge and responded with an outstanding technical reference for the brazing industry. You will notice that each chapter was assigned to a reviewer who was responsible for its final technical criteria. Many reviewers had assistance from others at their

16、 respective company or within the industry. Without their collaboration, the book would not have been possible. Special thanks go to the members of the AWS C3 Committee on Brazing and Soldering and AWS C3A Sub- committee for the Brazing Handbook who addressed the many challenges that accompany such

17、an undertaking. Carmen Paponetti Chair, C3A Subcommittee for the Brazing Handbookxiii Preface This preface is not part of the Brazing Handbook, but is included for informational purposes only. Knowledge of the ancient art of brazing is continuously being supplemented by an ever-increasing amount of

18、technical information about metals and their behavior, so that today brazing must be considered both an art and a science. This Fifth Edition of the Brazing Handbook (formerly the Brazing Manual) addresses the fundamental concepts of brazing and incorporates the many advances made since the Brazing

19、Manual was first published. The American Welding Society defines brazing as “a group of joining processes that produces coalescence of materials by heating them to the brazing temperature in the presence of a filler metal having a liquidus above 840F (450C) and below the solidus of the base metal. T

20、he filler metal is distributed between the closely fitted faying surfaces of the joint by capillary action.” Brazing then must meet each of three criteria: 1. The parts must be joined without melting the base metals. 2. The filler metal must have a liquidus temperature above 840F (450C). 3. The fill

21、er metal must wet the base metal surfaces and be drawn into or held in the joint by capillary action. To achieve a good joint using any of the various brazing processes described in this Brazing Handbook, the parts must be properly cleaned and must be protected, either by fluxing or protective atmos

22、phere during the heating process, to prevent excessive oxidation. The parts must be designed to afford a capillary for the filler metal when properly aligned, and a heating process must be selected that will provide the proper brazing tem- perature and heat distribution. No analysis of a subject tha

23、t is continuously being improved can hope to be complete, nor can the subject be covered with a thoroughness that would satisfy the specialist. For this reason, most chapters provide a list of references that give additional and more detailed information on the subject. Yet even after the additional

24、 research, trial and error may be required to successfully complete unusual applications. It is hoped, however, that the trials and errors will be fewer for having this Brazing Handbook as a guide. Comments, inquiries, and suggestions for future revisions of the Brazing Handbook are welcome. They should be sent to the Secretary, AWS C3 Committee on Brazing and Soldering, American Welding Society, 550 N.W. LeJeune Road, Miami, FL 33126.