SAE AMS 2767-2013 Uphill Quenching of Aluminum Alloy Product《铝合金产品的上坡淬火》.pdf

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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 revised, reaffirmed, stabilized, or cancelled. SAE invites your written comments and suggestions.Copyright 2013 SAE InternationalAll rights reserved. No part of this publi

3、cation 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: +1 724-776-4970 (out

4、side USA)Fax: 724-776-0790Email: CustomerServicesae.orgSAE WEB ADDRESS: http:/www.sae.orgSAE values your input. To provide feedbackon this Technical Report, please visithttp:/www.sae.org/technical/standards/AMS2767AEROSPACE MATERIAL SPECIFICATIONAMS2767Issued 2013-12Uphill Quenching of Aluminum Allo

5、y ProductRATIONALEAMS2767 defines and standardizes a process in current use by aerospace customers to reduce internal residual stress.The products covered by this specification include aluminum wrought or cast parts or semi-finished shapes.1. SCOPEThis specification establishes engineering requireme

6、nts for the uphill quenching process. Uphill quenching immerses product in liquid nitrogen followed by exposure to a high pressure/velocity steam blast or boiling water.1.1 Application1.1.1 These processes are applicable to both wrought and cast shapes. 1.1.2 This document is applicable when called

7、out on an engineering drawing, required or permitted by a heat-treating specification or specified by a customer purchase order.1.2 ClassificationThis process is categorized by types, classes and levels as follows:Type I - Uphill quench using high velocity steam as the heating medium.Type II -Uphill

8、 quench using boiling water as the heating medium.Class 1 - Applications where uphill quench process is preceded by solution treatment and quenching (AQ).Class 2-Applications where uphill quench process is performed on material in any other condition (e.g. F,O,W,T5,T6,T7,T8.) than as specified in cl

9、ass 1.Level 1 process is controlled and qualified by a procedure developed by the processor.Level 2 process is controlled and qualified by a procedure developed by the processor and approved by the customer that may include a stress reduction test method defined by the customer.SAE INTERNATIONAL AMS

10、2767 Page 2 of 51.2.1 When no type, class or level is specified, Type I, Class1, Level 2 shall be the default condition.2. APPLICABLE DOCUMENTS2.1 SAE PublicationsAvailable from SAE International, 400 Commonwealth Drive, Warrendale, PA 15096 0001, Tel: 877 606 7323 (inside USA and Canada) or 724 776

11、 4970 (outside USA), or www.sae.org.AMS2770 Heat Treatment of Aluminum Alloy PartsAMS2771 Heat Treatment of Aluminum Alloy CastingsAMS2772 Heat Treatment of Aluminum Alloy Raw MaterialsAMS2750 Pyrometry3. TECHNICAL REQUIREMENTS3.1 Equipment.3.1.1 Liquid nitrogen source.3.1.2 Liquid nitrogen processi

12、ng tank.3.1.3 Type I Processing:3.1.3.1 Steam Boiler3.1.3.2 Appropriate steam blast fixture designed, if needed or suitable for the individual part.3.1.4 Type 2 processing3.1.4.1 Water tank and heating apparatus 3.1.5 A digital surface temperature indicator with appropriate thermocouple.3.1.6 When r

13、equired by processing plan, refrigeration equipment with temperature control and recorder.3.2 Temperature control and measuring equipment shall meet the requirements of AMS2750, Class 2, except that temperature uniformity survey for equipment used for uphill quenching steps is not required. Temperat

14、ure uniformity survey is applicable to solution heat treatment and precipitation hardening performing in conjunction with AMS2770, AMS2771, AMS2772.3.3 Procedures3.3.1 Class 1 onlyProduct shall be solution heat treated and quenched in accordance with AMS2770, AMS2771, AMS2772 or other controlling sp

15、ecification as defined by the purchase order.3.3.2 For Class 1 product onlyUphill quenching shall either commence within 30 minutes of quenching from solution heat treatment or, if the product is held in the AQ condition after solution heat treatment, the AQ product shall be placed in a freezer with

16、in 30 minutes and maintained at a temperature equal to or lower than 0 F (-18 C) for a maximum of 7 days and uphill quench shall be performed within 30 minutes after removal from the freezerSAE INTERNATIONAL AMS2767 Page 3 of 53.3.3 All Types / Classes / LevelsCool the product in liquid nitrogen. Pr

17、oduct shall be totally submerged in liquid nitrogen, allow the product thermally stabilize and should remain immersed 30 minutes after boiling around the product stops.3.3.4 Product transfer3.3.4.1 The transfer time from the liquid nitrogen bath to the heating medium should be minimized to avoid any

18、 ice buildup on the product and shall not exceed 20 seconds. Longer transfer times are acceptable if allowed with a level 2 approval.3.3.5 Heating procedures3.3.5.1 Type I ProcessingSelect the designated steam blast fixture for the part being processed. The fixture shall be capable of equally and si

19、multaneously exposing all surfaces of the part to high velocity steam.3.3.5.1.1 The steam blast fixture shall be preheated to 180F minimum. 3.3.5.1.2 The product shall have steam applied on all external surfaces and on internal surfaces as defined by the process.3.3.5.1.3 The duration of the steam a

20、pplication is dependent upon the thickness of the part, and shall be continuous until the temperature sensor reading of the part is between 180 and 220 F (82 and 104 C). Exposure to 220 F (104 C) shall be less than 60 seconds in any one cycle.3.3.5.1.4 The temperature of each part after application

21、of the steam shall be determined by a digital temperature indicating device, the surfaces of the product shall be at a minimum of 180 F (82 C). The temperature indicator may be integrated into the holding fixture or utilized manually. After the part has been steamed, air-cool the part to room temper

22、ature.3.3.5.2 Type II ProcessingTransfer product from the liquid nitrogen to the boiling water tank using holding fixtures capable of withstanding the thermal shock and compatible with the material, quenching and heating medium. 3.3.5.2.1 The product shall be totally immersed in boiling water. Produ

23、ct surface should reach a minimum of 160 F. After immersion the product shall be removed from the tank and air-cooled to room temperature.3.3.6 When specified in Level 2, a stress reduction test method defined by the purchaser shall be used to quantify stress reduction. The test result shall comply

24、with purchasers specified requirements.3.3.7 Following uphill quenching, any further thermal treatment shall be in accordance with the drawing or purchase document3.3.8 ReprocessingFor all Types / Classes / Levels, the product shall not be reprocessed without prior customer approval. The number of r

25、eprocessing cycles shall be in accordance with customer requirements. Reprocessing for Class 1 may include a solution heat treat and quench and additional uphill quench cycles. Reprocessing for Class 2 only includes additional uphill quench cycles.3.3.9 Personnel TrainingSuppliers performing stress

26、relieving in accordance with this specification shall have a program of initial and periodic training and evaluation of its personnel.SAE INTERNATIONAL AMS2767 Page 4 of 54. QUALITY ASSURANCE PROVISIONS4.1 Responsibility for InspectionExcept as specified by the purchasing documents, the processor sh

27、all be responsible for the performance of all tests and inspections specified herein. The procuring source reserves the right to perform any surveillance or tests or inspections of product, and to review records and results of processors tests and inspections to verify that the process conformed to

28、the specified requirements.4.2 Logs A record (written or electronic storage media), traceable to temperature recording information (chart(s) or electronic storage media and shop travelers or other documentation, shall be maintained for each lot of product processed. The information on the combinatio

29、n of these documents shall include: equipment identification, approved personnels identification, date, part number or product identification, quantity of product, alloy, lot identification, (other applicable specification), and the actual thermal processing times and temperatures used, indicating t

30、otal number of cycles. The log shall contain test data for validation of the process when required for Level 2 product.4.3 RecordsRecords shall be maintained and made available for a minimum of 5 years. The records shall contain all data necessary to verify conformance to the requirements of this sp

31、ecification.4.4 Approval:The process and control factors for product produced and certified to level 1 shall be approved by the processors quality assurance organization. Level 2 approval requires customer concurrence of the processors procedures.4.4.1.1 A process procedure is required that defines:

32、the liquid nitrogen tank sizethe proximity of the liquid nitrogen tank to the heating mediathe method and time for transferring the product from the liquid nitrogen to the uphill quench application.the parameters of the heating media (steam, or water)the temperature range of the heating mediathe fix

33、turing used to support the product or apply the steam (Type 1 only)the number of times the product is to be immersed in the liquid nitrogen and the heating media that defines a single cyclethe number of cycles to be performedthe method and location for any residual stress measurements (level 2 only)

34、.4.4.2 Level 2 requires customer approval of the procedure for uphill quenching. Process verification samples and test method shall be as defined by the customer.4.4.3 The processor shall make no change to the approved processes, or process parameters defined in 4.4.1.1 without re-approval4.5 Report

35、/CertificationThe processor shall furnish, with each shipment of products a certified quality assurance report, traceable to the heat treat control number(s), stating that the products were processed in accordance with the requirements of this document. This report shall include: purchase order numb

36、er, lot number, AMS2767, part number or product identification, alloy, temper/strength designation, quantity of product in the shipment; identification of equipment used; actual processing times and temperatures used, the total number of cycles, the Type, Class and Level of the product. When applica

37、ble, the report shall include results, of the process validation tests and for Level 2 only a statement of their conformance/ non-conformance to customer requirements, or when specified, the numerical results of the stress reduction measurement test.5. PREPARATION FOR DELIVERYNot applicable.SAE INTE

38、RNATIONAL AMS2767 Page 5 of 56. ACKNOWLEDGMENTA processor shall mention this specification number in all quotations and when acknowledging purchase orders.7. REJECTIONSProduct not conforming to this specification, or to modifications authorized by purchaser, will be subject to rejection.8. NOTES8.1

39、A change bar (|) located in the left margin is for the convenience of the 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, inc

40、luding technical revisions. Change bars and (R) are not used in original publications, nor in documents that contain editorial changes only.8.2 Dimensions and properties in inch/pound units and the Fahrenheit temperatures are primary; dimensions and properties in SI units and the Celsius temperature

41、s are shown as the approximate equivalents of the primary units and are presented only for information.8.3 Purchase documents should specify not less than the following:AMS2767Materials alloy designationType, Class and Level requiredQuantity of pieces to be stress relieved.Number of repeat cycles to be performed if any.For Level 2 only, if required by purchaser, stress reduction validation method and requirementsPREPARED BY AMEC AND AMS COMMITTEE “D”