1、BRITISH STANDARD BS ISO 19959:2005 Visual examination of the surface condition of investment castings Steel, nickel alloys and cobalt alloys ICS 77.140.80 BS ISO 19959:2005 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 19 May 2005 BSI 19 Ma
2、y 2005 ISBN 0 580 46026 6 National foreword This British Standard reproduces verbatim ISO 19959:2005 and implements it as the UK national standard. The UK participation in its preparation was entrusted to Technical Committee ISE/6, Steel castings, which has the responsibility to: A list of organizat
3、ions represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”,
4、or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer i
5、mmunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate t
6、hem in the UK. Summary of pages This document comprises a front cover, an inside front cover, the ISO title page, pages ii and iii, a blank page, pages 1 to 3 and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Amendments issued since pu
7、blication Amd. No. Date Comments Reference number ISO 19959:2005(E) OSI 5002INTERNATIONAL STANDARD ISO 19959 First edition 2005-04-01 Visual examination of the surface condition of investment castings Steel, nickel alloys and cobalt alloys Examen visuel de ltat de surface des pices moules par le pro
8、cd dit la cire perdue Acier, alliages de nickel et alliages de cobalt BSISO19959:2005IS:95991 O5002(E) DPlcsid Fremia ihTs PDF file may ctnoian emdebt dedyfepcaes. In ccaocnadrw eith Aebods licensilop gnic,y this file mairp eb ynted iv roweb detu slahl ton ide ebtlnu deess the typefaces whice era hm
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13、O 5002 Allr ithgsr esedevrBSISO19959:2005IS:95991 O5002(E) I SO 5002 All irthgs ersedevr iiiForeword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried
14、out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO
15、collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare Internationa
16、l Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the eleme
17、nts of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 19959 was prepared by Technical Committee ISO/TC 17, Steel, Subcommittee SC 11, Steel castings. BSISO19959:2005blank 5002:95991OSISBINTENRATIONAL TSANDADR IS
18、:95991 O5002(E)I SO 5002 All irthgs ersedevr 1Visual examination of the surface condition of investment castings Steel, nickel alloys and cobalt alloys 1 Scope This International Standard specifies the acceptance criteria for the surface inspection of steel, nickel alloy and cobalt alloy investment
19、castings by visual examination. NOTE Criteria for special applications such as aerospace are defined in other International Standards. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applie
20、s. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 3059:2001, Non-destructive testing Penetrant testing and magnetic particle testing Viewing conditions ISO 9712:2005, Non-destructive testing Qualification and certification of personnel 3
21、 Ordering information The enquiry and order shall specify the extent of the surface to be examined, the number of castings to be examined, the acceptance level required (different acceptance levels may be specified for different surfaces of the same casting; if no acceptance level is specified, leve
22、l IV applies), and any surface conditions that are unacceptable. BSISO19959:2005IS:95991 O5002(E) 2 I SO 5002 All irthgs ersedevr4 Terms and definitions For the purposes of this document, the following terms and definitions apply. 4.1 surface pit depression on the surface of the casting, the length
23、of the depression being less than three times its width 4.2 linear discontinuity depression on the surface of the casting, the length of the depression being equal to, or greater than, three times its width 4.3 positive metal raised metal on the casting surface 4.4 surface roughness measure of the s
24、urface condition NOTE The surface roughness is normally determined by the use of a visual/tactile comparator. 4.5 parting line surface condition resulting from joints in the tool or die NOTE Parting lines are not linear discontinuities. 4.6 ejector-pin mark a surface condition caused by pins used to
25、 remove the pattern from the die 4.7 gate stub positive metal resulting from the removal of the gate used to direct molten metal into the mould 5 Method of inspection 5.1 Qualification of operators Inspection shall be performed by personnel, qualified in accordance with ISO 9712, or by a certificati
26、on scheme which is considered to be equivalent. The qualification level of the personnel shall be agreed between the manufacturer and the purchaser at the time of acceptance of the order. 5.2 Conditions of inspection The inspection shall be carried out with the naked eye or at a maximum magnificatio
27、n of 3, and the viewing conditions shall be in conformity with ISO 3059. 6 Acceptance criteria 6.1 Levels of acceptance for visual examination are given in Table 1. 6.2 Castings shall not exhibit linear discontinuities. Surface conditions that are less than 0,25 mm are non- relevant. BSISO19959:2005
28、IS:95991 O5002(E) I SO 5002 All irthgs ersedevr 36.3 Surface roughness and surface pits that will be removed by subsequent machining are acceptable. 6.4 Surface features not addressed in this International Standard shall be agreed between the purchaser and manufacturer at the time of the enquiry and
29、 order. Table 1 Visual examination acceptance criteria aSurface feature Level I Level II Level III Level IV Surface pits b,c,d0,75 mm dia. 0,40 mm deep with no more than one per 625 mm 20,75 mm dia. 0,40 mm deep with no more than one per 625 mm 21,50 mm dia. 0,75 mm deep with no more than one per 62
30、5 mm 21,50 mm dia. 0,75 mm deep with no more than four per 625 mm 2Linear discontinuities None permitted None permitted None permitted None permitted Positive metalc,d1,0 mm dia. 0,25 mm high with no more than one per 625 mm 21,50 mm dia. 0,40 mm high with no more than one per 625 mm 23,00 mm dia. 0
31、,75 mm high with no more than one per 625 mm 23,00 mm dia. 0,75 mm high with no more than four per 625 mm 2Parting line and ejector-pin mark heighte0,10 mm 0,25 mm 0,50 mm 1,00 mm Gate stub height 0,25 mm 0,40 mm 0,75 mm 1,15 mm Apparent surface roughness d1,6 m 2,5 m 3,2 m 6,3 m dia.: diameter a Su
32、rface conditions in excess of the level specified are not acceptable.b Maximum surface-pit depth shall not violate the required minimum wall thickness. c Surface pits, linear discontinuities or positive metal less than 0,25 mm shall be considered non-relevant. d Determined by visual inspection using
33、 a visual/tactile comparator, for example BNIF 359-01, Plate 3/OS1 = Ra 1.6/3.2, Plate 2/OS1 = Ra 6.3. e Applies to positive metal, other surface conditions shall be covered by the requirements of surface pits.BSISO19959:2005BS ISO 19959:2005 BSI 389 Chiswick High Road London W4 4AL BSI British Stan
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