1、 _ SAE Technical Standards Board Rules provide that: “This report is published by SAE to advance the state of technical and engineering sciences. The use of this report is entirely voluntary, and its applicability and suitability for any particular use, including any patent infringement arising ther
2、efrom, is the sole responsibility of the user.” SAE reviews each technical report at least every five years at which time it may be revised, reaffirmed, stabilized, or cancelled. SAE invites your written comments and suggestions. Copyright 2017 SAE International All rights reserved. No part of this
3、publication may be reproduced, stored in a retrieval system or transmitted, in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without the prior written permission of SAE. TO PLACE A DOCUMENT ORDER: Tel: 877-606-7323 (inside USA and Canada) Tel: +1 724-776-49
4、70 (outside USA) Fax: 724-776-0790 Email: CustomerServicesae.org SAE WEB ADDRESS: http:/www.sae.org SAE values your input. To provide feedback on this Technical Report, please visit http:/standards.sae.org/AMS2451/7B AEROSPACE MATERIAL SPECIFICATION AMS2451/7 REV. B Issued 2000-08 Reaffirmed 2011-04
5、 Revised 2017-04 Superseding AMS2451/7A Plating, Brush, Nickel Low Stress, Medium-Hardness Deposit RATIONALE AMS2451/7B is a Five-Year Review and update of this specification with a change to 3.3. 1. SCOPE 1.1 Purpose This specification covers the requirements for brush plating of medium-hardness, l
6、ow stress nickel by electrodeposition. 1.2 Application This process has been used typically to improve wear resistance, to repair medium-hardness, low stress nickel electrodeposits and to repair damaged, worn, or mismachined parts in applications requiring hardness, fatigue resistance of parts with
7、service temperatures up to 450 F (232 C), but usage is not limited to such applications. 1.3 Safety - Hazardous Materials Shall be in accordance with AMS2451. 2. APPLICABLE DOCUMENTS In addition to those listed in AMS2451, the issue of the following documents in effect on the date of the purchase or
8、der forms a part of this specification to the extent specified herein. The supplier may work to a subsequent revision of a document unless a specific document issue is specified. When the referenced document has been cancelled and no superseding document has been specified, the last published issue
9、of that document shall apply. 2.1 SAE Publications Available from SAE International, 400 Commonwealth Drive, Warrendale, PA 15096-0001, Tel: 877-606-7323 (inside USA and Canada) or +1 724-776-4970 (outside USA), www.sae.org. AMS2423 Plating, Nickel, Hard Deposit SAE INTERNATIONAL AMS2451/7B Page 2 o
10、f 3 3. TECHNICAL REQUIREMENTS Shall be in accordance with AMS2451 and as follows. 3.1 Procedure 3.1.1 Nickel shall be electrodeposited from a sulfamate nickel brush plating solution containing addition agents to produce the specific hardness in accordance with processing instructions from the soluti
11、on manufacturer. 3.2 Properties 3.2.1 Adhesion to Specimens The requirements of AMS2451 shall apply. 3.2.2 Hardness The hardness of the deposit shall be 400 to 500 HV or equivalent. 3.2.3 Stress The residual surface stress in the deposit shall be within the range of 0 to 15.0 ksi (0 to 103 MPa) comp
12、ressive. 3.3 Hydrogen Embrittlement Shall be in accordance with AMS2451. 4. QUALITY ASSURANCE PROVISIONS Shall be in accordance with AMS2451. 5. PREPARATION FOR DELIVERY Shall be in accordance with AMS2451. 6. ACKNOWLEDGMENT Shall be in accordance with AMS2451. 7. REJECTIONS Shall be in accordance w
13、ith AMS2451. SAE INTERNATIONAL AMS2451/7B Page 3 of 3 8. NOTES See AMS2451 and the following. 8.1 Plating meeting the requirements of this specification will meet the performance requirements of AMS2423E. 8.2 Revision Indicator A change bar (l) located in the left margin is for the convenience of th
14、e user in locating areas where technical revisions, not editorial changes, have been made to the previous issue of this document. An (R) symbol to the left of the document title indicates a complete revision of the document, including technical revisions. Change bars and (R) are not used in original publications, nor in documents that contain editorial changes only. PREPARED BY AMS COMMITTEE “B”
