BS HC 206-1975 Specification for precipitation hardening nickel base chromium-cobalt-molybdenum-titanium alloy precision castings (Cr 20 Co 20 Mo 6 Ti 2)《沉淀硬化镍基铬-钴-钼-钛合金精密铸件规范(铬20、.pdf

《BS HC 206-1975 Specification for precipitation hardening nickel base chromium-cobalt-molybdenum-titanium alloy precision castings (Cr 20 Co 20 Mo 6 Ti 2)《沉淀硬化镍基铬-钴-钼-钛合金精密铸件规范(铬20、.pdf》由会员分享，可在线阅读，更多相关《BS HC 206-1975 Specification for precipitation hardening nickel base chromium-cobalt-molybdenum-titanium alloy precision castings (Cr 20 Co 20 Mo 6 Ti 2)《沉淀硬化镍基铬-钴-钼-钛合金精密铸件规范(铬20、.pdf（6页珍藏版）》请在麦多课文档分享上搜索。

1、BRITISH STANDARD AEROSPACE SERIES BS HC 206:1975 Incorporating Amendment No. 1 Specification for Precipitation hardening nickel base chromium-cobalt- molybdenum-titanium alloy precision castings (Cr 20, Co 20, Mo 6, Ti 2) UDC 629.7:669.245262528295 14:669.245.018.298BSHC206:1975 This British Standar

2、d, having been approved by the AerospaceIndustry Standards Committee, was published underthe authority of the Executive Board on 30September1975 BSI 01-2000 The following BSI references relate to the work on this standard: Committee reference ACE/60 Draft for comment 73/38194 DC ISBN 0 580 08915 0 A

3、 British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a

4、 front cover, an inside front cover, pages i and ii, page 1 and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Amendments issued since publication Amd. No. Date of is

5、sue Comments 3881 February 1982 Indicated by a sideline in the marginBSHC206:1975 BSI 01-2000 i Contents Page 1 Inspection and testing procedure 1 2 Manufacture 1 3 Chemical composition 1 4 Condition 1 5 Heat treatment 1 6 Mechanical properties 1 7 Rectification of defects 1ii blankBSHC206:1975 BSI

6、01-2000 1 1 Inspection and testing procedure This British Standard shall be used in conjunction with the relevant sections of the latest issue of BSHC 100 as follows: 2 Manufacture Material intended for the production of re-melting stock or castings shall be melted and cast under vacuum. 3 Chemical

7、composition The re-melting stock and castings shall contain: 4 Condition Castings shall be supplied in the solution treated condition. 5 Heat treatment The final heat treatment shall be as follows. 5.1 Solution treatment. Heat at a temperature of1150 10 C for 2 h in a protective atmosphere and cool

8、to room temperature. 5.2 Precipitation treatment. Heat at a temperature of 800 10 C for 8 h and cool in air to room temperature. 6 Mechanical properties 6.1 Tensile. The tensile properties obtained from test pieces representing castings, selected, prepared and tested in accordance with the relevant

9、requirements of BSHC 100, shall be: NOTEInformation on SI units is given in BS 3763“The International System of units (SI)” and BS 350 “Conversion factors and tables”. 7 Rectification of defects 7.1 Correction of distortion. When permitted in accordance with BS HC 100, distortion shall be corrected

10、after solution treatment. 7.2 Repair of castings by welding. When repairby welding is permitted in accordance with BS HC 100, castings shall subsequently be solution treated. Re-melting stock sections 1 and 2 Precision castings sections 1 and 3 Element % min. max. Carbon 0.04 0.08 Silicon 0.4 Mangan

11、ese 0.6 Sulphur 0.007 Silver a 0.0005 (5 p.p.m.) Bismuth a 0.0001 (1 p.p.m.) Aluminium 0.3 0.6 Cobalt 19.0 21.0 Chromium 19.0 21.0 Copper 0.2 Iron 0.7 Molybdenum 5.6 6.1 Niobium 0.25 Lead a 0.0010 (10 p.p.m.) Titanium 1.9 2.4 Tungsten 0.2 Aluminium + titanium 2.4 2.8 Nickel Remainder NOTEAttention i

12、s drawn to the fact that this alloy composition is the subject of a patent. Re-melting stock can only be manufactured under licence. a To be determined on re-melting stock only. 0.2% proof stress Tensile strength Elongation min. min. min. MPa (= N/mm 2 ) MPa (= N/mm 2 ) % 430 620 12BS HC 206:1975 BS

13、I 389 Chiswick High Road London W4 4AL BSIBritishStandardsInstitution BSI is the independent national body responsible for preparing BritishStandards. It presents the UK view on standards in Europe and at the international level. It is incorporated by Royal Charter. Revisions BritishStandards are up

14、dated by amendment or revision. Users of BritishStandards should make sure that they possess the latest amendments or editions. It is the constant aim of BSI to improve the quality of our products and services. We would be grateful if anyone finding an inaccuracy or ambiguity while using this Britis

15、hStandard would inform the Secretary of the technical committee responsible, the identity of which can be found on the inside front cover. Tel:02089969000. Fax:02089967400. BSI offers members an individual updating service called PLUS which ensures that subscribers automatically receive the latest e

16、ditions of standards. Buying standards Orders for all BSI, international and foreign standards publications should be addressed to Customer Services. Tel:02089969001. Fax:02089967001. In response to orders for international standards, it is BSI policy to supply the BSI implementation of those that h

17、ave been published as BritishStandards, unless otherwise requested. Information on standards BSI provides a wide range of information on national, European and international standards through its Library and its Technical Help to Exporters Service. Various BSI electronic information services are als

18、o available which give details on all its products and services. Contact the Information Centre. Tel:02089967111. Fax:02089967048. Subscribing members of BSI are kept up to date with standards developments and receive substantial discounts on the purchase price of standards. For details of these and

19、 other benefits contact Membership Administration. Tel:02089967002. Fax:02089967001. Copyright Copyright subsists in all BSI publications. BSI also holds the copyright, in the UK, of the publications of the international standardization bodies. Except as permitted under the Copyright, Designs and Pa

20、tents Act 1988 no extract may be reproduced, stored in a retrieval system or transmitted in any form or by any means electronic, photocopying, recording or otherwise without prior written permission from BSI. This does not preclude the free use, in the course of implementing the standard, of necessa

21、ry details such as symbols, and size, type or grade designations. If these details are to be used for any other purpose than implementation then the prior written permission of BSI must be obtained. If permission is granted, the terms may include royalty payments or a licensing agreement. Details and advice can be obtained from the Copyright Manager. Tel:02089967070.