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 theref
2、rom, is the sole responsibility of the user.” SAE reviews each technical report at least every five years at which time it may be reaffirmed, revised, or cancelled. SAE invites your written comments and suggestions. Copyright 2006 SAE International All rights reserved. No part of this publication ma
3、y 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: 724-776-4970 (outside USA)
4、Fax: 724-776-0790 Email: custsvcsae.org SAE WEB ADDRESS: http:/www.sae.org AMS 2451/3A AEROSPACE MATERIAL SPECIFICATION Issued JUL 1998 Revised MAY 2006 Superseding AMS 2451/3 Plating, Brush, Nickel Low Stress, Low-Hardness Deposit RATIONALE AMS 2451/3A is a Five Year Review and update of this speci
5、fication. 1. SCOPE 1.1 Purpose This specification covers the requirements for brush plating of low-hardness, low-stress nickel by electrodeposition. 1.2 Application This process has been used typically to improve the corrosion and oxidation resistance of steel alloys, to repair damaged, worn, or mis
6、machined parts requiring low residual surface stress, to prepare surfaces for brazing, and to repair nickel electrodeposits on parts with service a temperature up to 700 F (371 C) but is not limited to such applications. 1.3 Safety - Hazardous Materials See AMS 2451. 2. APPLICABLE DOCUMENTS See AMS
7、2451. 3. TECHNICAL REQUIREMENTS See AMS 2451. 3.1 Procedure 3.1.1 Nickel shall be electrodeposited from a sulfamate nickel brush plating solution in accordance with instructions from the solution manufacturer. The plating solution shall contain no addition agents, including stress-reducing agents, w
8、hich might have a detrimental effect on properties of the plate or of the basis metal. Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-SAE AMS 2451/3A - 2 - 3.2 Properties 3.2.1 Adhesion to Specimens
9、 The requirements of AMS 2451 shall apply. 3.2.2 Hardness The hardness of the deposit shall be no greater than 300 HV, or equivalent. 3.2.3 Stress The residual stress in the deposit shall be within the range of 5 ksi (34.5 Mpa) compressive, to 15.0 ksi (103 Mpa) tensile. 3.2.4 Heat Resistance The re
10、quirements of AMS 2451 shall apply. 3.2.5 Corrosion Resistance The requirements of AMS 2451 shall apply. Specimens shall be plated to a thickness of 0.0003 to 0.0006 inches (8 to 16 m). The post-plating treatment shall be that of the heat resistance test or the hydrogen embrittlement relief treatmen
11、t. 4. QUALITY ASSURANCE PROVISIONS See AMS 2451. 5. PREPARATION FOR DELIVERY See AMS 2451. 6. ACKNOWLEDGMENT See AMS 2451. 7. REJECTIONS See AMS 2451. 8. NOTES See AMS 2451. 8.1 Plating meeting the requirements of this specification will meet the performance requirements of AMS 2424. 8.2 Hardness co
12、nversion tables for metals are presented in ASTM E 140. 8.3 Key Words Nickel deposit, brush plating, selective plating, low-stress plate, high-temperature nickel, repair, worn parts, braze, mismachined parts, sulfamate nickel PREPARED BY AMS COMMITTEE “B” Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
