BS HC 205-1974 Specification for precipitation hardening nickel base chromium-cobalt-molybdenum-titanium alloy castings (Cr 20 Co 20 Mo 6 Ti 2)《沉淀硬化镍基铬-钴-钼-钛合金铸件规范(铬20、钴20、钼6、钛2》.pdf

《BS HC 205-1974 Specification for precipitation hardening nickel base chromium-cobalt-molybdenum-titanium alloy castings (Cr 20 Co 20 Mo 6 Ti 2)《沉淀硬化镍基铬-钴-钼-钛合金铸件规范(铬20、钴20、钼6、钛2》.pdf》由会员分享，可在线阅读，更多相关《BS HC 205-1974 Specification for precipitation hardening nickel base chromium-cobalt-molybdenum-titanium alloy castings (Cr 20 Co 20 Mo 6 Ti 2)《沉淀硬化镍基铬-钴-钼-钛合金铸件规范(铬20、钴20、钼6、钛2》.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 205:1974 Incorporating Amendment No. 1 Specification for Precipitation hardening nickel base chromium-cobalt- molybdenum-titanium alloy castings (Cr 20, Co 20, Mo 6, Ti 2) UDC 629.7:669.245262528295 14:669.245.018.298BSHC205:1974 This British Standard having b

2、eenapproved by the AerospaceIndustry Standards Committee, was published underthe authority of the Executive Board on 10 May 1974 BSI 01-2000 The following BSI references relate to the work on this standard: Committee reference ACE/60 Draft for comment 72/35126 DC ISBN 0 580 08333 0 A British Standar

3、d 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 front cover, an

4、 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 issue Comments 384

5、2 May 1982 Indicated by a sideline in the marginBSHC205:1974 BSI 01-2000 i Contents Page 1 Inspection and testing procedure 1 2 Chemical composition 1 3 Condition 1 4 Heat treatment 1 5 Mechanical properties 1 6 Rectification of defects 1ii blankBSHC205:1974 BSI 01-2000 1 1 Inspection and testing pr

6、ocedure This British Standard shall be used in conjunction with the relevant sections of the latest issue of BSHC 100 as follows: 2 Chemical composition The re-melting stock and castings shall contain: 3 Condition Castings shall be supplied solution treated in accordance with 4.1. 4 Heat treatment T

7、he final heat treatment shall be as follows. 4.1 Solution treatment. Heat uniformly at a temperature of 1 150 10 C for 2 h in a protective atmosphere and cool to room temperature. 4.2 Precipitation treatment. Heat uniformly at a temperature of 800 10 C for 8 h and cool in air to room temperature. 5

8、Mechanical properties 5.1 Tensile. The room temperature tensile properties obtained from test pieces representing castings, selected, prepared and tested in accordance with the relevant requirements of BSHC 100, shall be: 6 Rectification of defects 6.1 Correction of distortion. When permitted in acc

9、ordance with BS HC 100, distortion shall be corrected after solution treatment. 6.2 Repair of castings by welding. When repair by welding is permitted in accordance with BSHC100, castings shall subsequently be solution treated. Re-melting stock Sections 1 and 2 Precision castings Sections 1 and 3 Ce

10、ntrifugal castings Sections 1 and 5 Element % min. max. Carbon 0.04 0.08 Silicon 0.4 Manganese 0.6 Sulphur 0.007 Silver 0.0005 (5 p.p.m.) Aluminium 0.3 0.6 Cobalt 19.5 21.0 Chromium 19.5 21.0 Copper 0.2 Iron 0.7 Molybdenum 5.6 6.1 Lead 0.0020 (20 p.p.m.) Titanium 2.0 2.4 Aluminium + Titanium 2.4 2.8

11、 Nickel Remainder NOTEAttention is drawn to the fact that this alloy composition is the subject of a patent. Re-melting stock can only be manufactured under licence. 0.2% proof stress Tensile strength Elongation min. min. min. MPa (N/mm 2 ) MPa (N/mm 2 ) % 430 620 12 NOTEInformation on SI units is g

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