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1、BRITISH STANDARD AEROSPACE SERIES CONFIRMED AUGUST 1985 BS S 152:1975 Incorporating Amendments Nos.1 and 2# and Corrigendum No.1 Specification for Chromiumcobalt molybdenum vanadiumniobium heat-resisting steel billets, bars, forgings and parts (consumable electrode remelted) (1 000 1 140 MPa) (Cr 10
2、.5, Co 6, Mo 0.8, V 0.2, Nb 0.3) ICS 49.025.10 ? Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 03:06:51 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS S 152:1975 This British Standard, having been approved by the Aerospace Industry Standard Committee, was publi
3、shed under the authority of the Executive Board on 30 September 1975 BSI 7 May 2004 The following BSI references relate to the work on this standard: Committee reference ACE/15 Draft for comment 73/32574 DC ISBN 0 580 08740 9 Committees responsible for this British Standard The preparation of this B
4、ritish Standard was entrusted to Technical Committee ACE/15, Wrought and cast steels for aerospace, upon which the following bodies were represented: Civil Aviation Authority Airworthiness Cast Metals Federation Confederation of British Metalforming Institute of Spring Technology MoD UK Defence Stan
5、dardization Society of British Aerospace Companies Ltd. UK Steel Association Co Opted Member Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages 1 to 3 and a back cover. The BSI copyright notice displayed in this document indicates when the document w
6、as last issued. Amendments issued since publication Amd. No.Date of issueComments 5183September 1986 1482024 February 2004 15155 Corrigendum No.1 7 May 2004Change to 7.2.2 Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 03:06:51 GMT+00:00 2006, Uncontrolled Copy
7、, (c) BSI BS S 152:1975 BSI 7 May 2004 i Contents Page Committees responsibleInside front cover 1Inspection and testing procedure1 2Manufacture1 3Chemical composition1 4Surface dressing1 5Condition2 6Heat treatment2 7Mechanical properties2 Licensed Copy: London South Bank University, London South Ba
8、nk University, Sat Dec 09 03:06:51 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ii blank Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 03:06:51 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS S 152:1975 BSI 7 May 2004 1 NOTEThis specification compiles with AECMA R
9、ecommendation FE PM38. 1 Inspection and testing procedure 1.1 General This British Standard shall be used in conjunction with the relevant sections of the latest issue of BS S 100 as follows: 1.2 Sulfur printing or deep etching tests One sample shall be taken from each ingot for sulfur printing or d
10、eep etching tests. 1.3 Ultrasonic examination The material shall be ultrasonically tested in accordance with the latest issue of BS S 100, Annex B. 2 Manufacture The material shall be manufactured by one of the following processes: a) Air melted in an electric furnace and consumable electrode remelt
11、ed. b) Vacuum induction melted and consumable electrode remelted. 3 Chemical composition The steel shall contain: 4 Surface dressing The material shall be overall dressed. Bars for machining delivered in the finally heat treated conditionSections 1 and 3 Forging stock and billets and bars for subseq
12、uent working Sections 1 and 5 Forgings Sections 1 and 6 Parts finally heat treated after machiningSections 1 and 7 Element % min.max. Carbon0.060.11 Silicon0.100.70 Manganese0.61.15 Phosphorus0.028 Sulfur0.020 Boron0.0040.012 Cobalt5.07.0 Chromium9.811.2 Molybdenum0.51.0 Niobium0.200.45 Nickel0.200.
13、80 Vanadium0.100.35 Nitrogen0.0100.035 Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 03:06:51 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS S 152:1975 2 BSI 7 May 2004 5 Condition 5.1 The material shall be supplied in the appropriate condition stated below: 5.
14、2 Parts shall be supplied finally heat treated. 6 Heat treatment 6.1 Softening treatment The material shall be softened by heating at a temperature of between 720 C and 760 C for 2 h, followed by cooling in air. 6.2 Final heat treatment 6.2.1 The material, parts and test samples shall be heat treate
15、d as follows: a) Hardening. Pre-heat to a temperature between of 650 C and 700 C and equalize. Heat at a temperature of 1 170 10 C, followed by quenching in oil. NOTEIf agreed between the manufacture and the purchaser and stated on the order or method of manufacture, parts may be air cooled from the
16、 hardening temperature. b) First tempering. Heat at a temperature of 610 5 C for not less than 2 h, followed by cooling in air to room temperature. c) Second tempering. Heat uniformly at a temperature between of 620 C and 650 C for not less than 2 h, followed by cooling in air. 6.2.2 Where bars deli
17、vered in the finally heat treated condition have been subjected to a cold straightening or cold rolling operation, they may be given a stress relieving treatment, which shall be sufficient to restore the proof stress. 7 Mechanical properties 7.1 Mechanical tests The mechanical properties obtained fr
18、om test pieces shall be as follows: 7.1.1 Creep test (One test per cast at cast release stage.) 7.1.2 Tensile test at room temperature Note deleted DesignationFormCondition of supply S152BBlack bars for machiningFinally heat treated S152DBright bars for machiningFinally heat treated before or after
19、cold drawing or cold rolling or machining or grinding S152AForging stock and billets and bars for subsequent working Softened S152CForgingsSoftened and finally heat treated TemperatureStressMax. total plastic strain in 100 h CMPa% 5503250.15 0.2 % proof stressTensile strengthElongation Reduction of
20、area min.min.max.min.min. MPa MPa MPa % 8801 0001 1401240 Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 03:06:51 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS S 152:1975 BSI 7 May 2004 3 7.2 Hardness test 7.2.1 The hardness of material heat treated in accordan
21、ce with 6.1 shall be not greater than 277 HB or 282 HV. 7.2.2 The hardness of material, parts and test samples heat treated in accordance with 6.2 shall be: 321 min./352 max. HB; or 340 min./370 max. HV. Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 03:06:51 G
22、MT+00:00 2006, Uncontrolled Copy, (c) BSI BS S 152:1975 BSI 389 Chiswick High Road London W4 4AL BSI British Standards Institution BSI is the independent national body responsible for preparing British Standards. It presents the UK view on standards in Europe and at the international level. It is in
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