BS EN ISO 4957-2000 Tool steels《工具钢》.pdf

1、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BRITISH STANDARD BS EN ISO 4957:2000 The E

2、uropean Standard EN ISO 4957:1999 has the status of a British Standard ICS 77.140.35 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Tool steelsThis British Standard, having been prepared under the direction of the Engineering Sector Committee, was published under the authorit

3、y of the Standards Committee and comes into effect on 15 March 2000 BSI 03-2000 ISBN 0 580 35854 2 BS EN ISO 4957:2000 Amendments issued since publication Amd. No. Date Comments National foreword This British Standard is the official English language version of EN ISO 4957:1999. It is identical with

4、 ISO 4957:1999. It supersedes BS 4659:1989 which is withdrawn. The UK participation in its preparation was entrusted to Technical Committee ISE/31, Wrought steels, which has the responsibility to: aid enquirers to understand the text; present to the responsible international/European committee any e

5、nquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references Atte

6、ntion is drawn to the fact that CEN and CENELEC Standards normally include an annex which lists normative references to international publications with their corresponding European publications. The British Standards which implement these international or European publications may be found in the BS

7、I Standards Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Find” facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are respon

8、sible 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 inside front cover, the EN ISO title page, the EN ISO foreword page, the ISO title page, pages ii to iv, pages

9、 1 to 32, an inside back cover and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued.EN ISO 4957:1999Referencenumber ISO4957:1999(E) INTERNATIONAL STANDARD ISO 4957 Secondedition 1999-12-15 Toolsteels Aciers outils EN ISO 4957:1999ii EN ISO

10、 4957:1999ISO5947:(9991)Eiii Contents 1 Scope1 2 Normativereferences1 3 Termsanddefinitions.2 4 Requirements.3 5 Inspection,testingandconformanceofproducts.4 6 Marking.5 7 Orderinganddesignation.5 AnnexA(informative)Hardness-temperingtemperature-curves18 AnnexB(normative)Supplementaryorspecialrequir

11、ements28 AnnexC(informative)Designationsofcomparablesteels.30 Bibliography32 EN ISO 4957:1999ISO5947:(9991)E iv Foreword ISO(theInternationalOrganizationforStandardization)isaworldwidefederationofnationalstandardsbodies(ISO memberbodies).TheworkofpreparingInternationalStandardsisnormallycarriedoutth

12、roughISOtechnical committees.Eachmemberbodyinterestedinasubjectforwhichatechnicalcommitteehasbeenestablishedhas therighttoberepresentedonthatcommittee.Internationalorganizations,governmentalandnon-governmental,in liaisonwithISO,alsotakepartinthework.ISOcollaboratescloselywiththeInternationalElectrot

13、echnical Commission(IEC)onallmattersofelectrotechnicalstandardization. InternationalStandardsaredraftedinaccordancewiththerulesgivenintheISO/IECDirectives,Part3. DraftInternationalStandardsadoptedbythetechnicalcommitteesarecirculatedtothememberbodiesforvoting. PublicationasanInternationalStandardreq

14、uiresapprovalbyatleast75%ofthememberbodiescastingavote. AttentionisdrawntothepossibilitythatsomeoftheelementsofthisInternationalStandardmaybethesubjectof patentrights.ISOshallnotbeheldresponsibleforidentifyinganyorallsuchpatentrights. InternationalStandardISO4957waspreparedbyTechnicalCommitteeISO/TC

15、17, Steel, Subcommittee SC 4, Heat treatable and alloy steels. Thissecondeditioncancelsandreplacesthefirstedition(ISO4957:1980)whichhasbeentechnicallyrevised. AnnexBformsanormativepartofthisInternationalStandard,annexesAandCareforinformationonly. EN ISO 4957:1999INTENRATIONAL TSANDADR ISO 7594:(9991

16、)E ISO 9991 All irhgts seredevr 1 Tool steels 1 Scope 1.1 This International Standard covers the following grades of wrought tool steels: a) non-alloy cold-work tool steels; b) alloy cold-work tool steels; c) alloy hot-work tool steels; d) high-speed tool steels. If not stated otherwise, this Intern

17、ational Standard applies to all types of hot-rolled, forged, cold-drawn or cold-rolled products which are supplied in one of the surface and heat-treatment conditions given in 4.1.2 and Table 1. Products according to this International Standard may be produced by powder metallurgy. NOTE 1 The Tables

18、 2, 4, 6 and 8 cover only those steels which have gained certain international importance, which does not mean however, that they are available in all industrial countries. In addition, a number of other steels for tools are specified in regional, national or company standards. NOTE 2 Where the heat

19、 resistance of the tools is of particular importance, as for example in the case of tools for hot forming glass, the material selection should be based on ISO 4955 or ISO 9722. 1.2 In addition to this International Standard, the general technical delivery requirements of ISO 404 are applicable. 2 No

20、rmative references The following normative documents contain provisions which, through reference in this text, constitute provisions of this International Standard. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. However, parties to agreements

21、 based on this International Standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies. Members of ISO and IEC maintain registers of

22、currently valid International Standards. ISO 377:1997, Steel and steel products Location and preparation of samples and test pieces for mechanical testing. ISO 404:1992, Steel and steel products General technical delivery requirements. ISO 1035-1:1980, Hot-rolled steel bars Part 1: Dimensions of rou

23、nd bars. ISO 1035-3:1980, Hot-rolled steel bars Part 3: Dimensions of flat bars. ISO 1035-4:1982, Hot-rolled steel bars Part 4: Tolerances. EN ISO 4957:1999 1ISO 7594:(9991)E 2 ISO 9991 All irhgts seredevr ISO 4948-1:1982, Steels Classification Part 1: Classification of steels into unalloyed and all

24、oy steels based on chemical composition. ISO 6506:1981 1) , Metallic materials Hardness test Brinell test. ISO 6508:1986 2) ,M e t al li cm at e ria l sH a rd ne sst e stRo ckw e llt e st(sca le sA-B-C-D-E-F-G-H-K ) . ISO 6929:1987, Steel products Definitions and classification. ISO/TR 9769:1991, St

25、eel and iron Review of available methods of analysis. ISO 10474:1991, Steel and steel products Inspection documents. ISO 14284:1996, Steel and iron Sampling and preparation of samples for the determination of chemical composition. 3 Terms and definitions For the purposes of this International Standa

26、rd, the terms and definitions given in ISO 4948-1 and ISO 6829 as well as the following apply. 3.1 product forms ISO 6929 3.2 unalloyed and alloyed steel ISO 4948-1 3.3 tool steels special steels suitable for working or processing of materials, for handling and measuring workpieces and, for this pur

27、pose, exhibiting high hardness and wear resistance and/or toughness 3.3.1 cold-work tool steels non-alloy or alloy tool steels for applications in which the surface temperature is generally below 200 C 3.3.2 hot-work tool steels alloy tool steels for applications in which the surface temperature is

28、generally over 200 C 3.3.3 high-speed tool steels steels used mainly for machining and for forming processes and which, because of their chemical composition, have the highest high-temperature hardness and temper resistance up to about 600 C 1) To be replaced by ISO 6506-1, ISO 6506-2 and ISO 6506-3

29、. 2) To be replaced by ISO 6508-1, ISO 6508-2 and ISO 6508-3. EN ISO 4957:1999 2ISO 7594:(9991)E ISO 9991 All irhgts seredevr 3 4 Requirements 4.1 Manufacturing process 4.1.1 General The manufacturing process of the steel and the products is left to the discretion of the manufacturer, with the restr

30、ictions given in 4.1.2. When he so requests, the purchaser shall be informed what steel making process is being used. 4.1.2 Heat-treatment condition and surface condition on delivery The heat-treatment and surface conditions of the products shall comply with the agreements when ordering. 4.1.2.1 Hea

31、t-treatment condition The heat-treatment conditions are given in Table 1. Unless otherwise specified in the order, the tool steels (except C45U, Table 2, 35CrMo7, X38CrMo16 and 40CrMnNiMo8-6-4, Table 4, 55NiCrMoV7, Table 6) are delivered in the annealed condition. 4.1.2.2 Surface condition Usual sur

32、face conditions are: a) the hot-rolled or forged condition ( = as hot worked); b) the machined (ground, polished, turned, peeled or milled) condition; c) the cold-reduced condition. 4.2 Chemical composition and mechanical properties 4.2.1 Table 1 gives a survey of combinations of usual heat-treatmen

33、t conditions at delivery and requirements according to Tables 2 to 9 (chemical composition, hardness). 4.2.2 For hardness-tempering temperature-curves of the steels see annex A. 4.2.3 For hardness penetration depth of non-alloy cold-work tool steels, see Table 2, footnote d. 4.3 Surface quality 4.3.

34、1 All products shall have a workmanlike finish and shall be clean and free from surface imperfections likely to have an adverse effect on their processing or designated application. 4.3.2 Ground, polished or finished-machined products shall be free from surface imperfections and surface decarburizat

35、ion. 4.3.3 Hot-rolled, forged, cold-drawn or rough-machined products shall be ordered with sufficient material to be removed from all surfaces by machining or grinding to allow for a) surface decarburization and b) surface imperfections. EN ISO 4957:1999 3ISO 7594:(9991)E 4 ISO 9991 All irhgts sered

36、evr As long as no International Standard for the machining allowances of tool steels is available, the allowances shall be agreed at the time of enquiry and order. 4.4 Shape, dimensions and tolerances The shape, dimensions and tolerances of the products shall comply with the requirements agreed upon

37、 at the time of enquiry and order. The agreements shall, as far as possible, be based on corresponding International Standards or otherwise, on suitable national standards. For rolled flat and round bars, the following International Standards cover dimensions and/or tolerances for products included

38、in this International Standard: ISO 1035-1, ISO 1035-3 and ISO 1035-4. NOTE By agreement, the tolerances can be all plus or other disposition than equal plus/minus. 5 Inspection, testing and conformance of products 5.1 Inspection and testing procedures and types of inspection documents 5.1.1 For eac

39、h delivery, the issue of any inspection document in accordance with ISO 10474 may be agreed upon at the time of enquiry and order. 5.1.2 If, in accordance with the agreements made at the time of enquiry and order, a test report is to be provided, this shall cover: a) the statement that the material

40、complies with the requirements of the order; b) the results of the cast analysis for all elements specified for the type of steel supplied. 5.1.3 If, in accordance with the agreements in the order, an inspection certificate 3.1.A, 3.1.B or 3.1.C or an inspection report 3.2 (see ISO 10474) is to be p

41、rovided, the specific inspections and tests described in 5.2 shall be carried out and their results shall be certified in the document. In addition the document shall cover a) the results of the cast analysis provided by the manufacturer for all elements specified for the steel type concerned; b) th

42、e results of all inspections and tests ordered by supplementary requirements (see annex B); c) the symbol letters of numbers connecting the inspection documents, the test pieces and products to each other. 5.2 Specific inspection and testing 5.2.1 Number of sample products 5.2.1.1 Chemical compositi

43、on The cast analysis is given by the manufacturer. For product analysis see B.2 in annex B. 5.2.1.2 Mechanical properties One sample product per test unit shall be tested. 5.2.1.2.1 For material delivered in the annealed or annealed and cold rolled or annealed and cold drawn condition, the test unit

44、 shall consist of products from the same cast and the same heat-treatment batch. EN ISO 4957:1999 4ISO 7594:(9991)E ISO 9991 All irhgts seredevr 5 In the case of material heat treated in a continuous furnace, a heat-treatment batch is regarded as that quantity of products (of the same cast and dimen

45、sions) which without any interruptions, was under constant treatment conditions (same furnace temperature, atmosphere and transportation speed) through the furnace. 5.2.1.2.2 For material delivered in the quenched and tempered condition, the test unit shall consist of products from the same cast, he

46、at-treatment and thickness. However, if the manufacturer verifies that the thickness has no significant effect on the hardness in the quenched and tempered condition, then different thicknesses may be covered in a test unit. 5.2.1.3 Inspection of the surface quality Unless otherwise agreed when orde

47、ring (see B.5), the number of products to be inspected for surface quality is left to the discretion of the inspector. 5.2.1.4 Dimensional inspection Unless otherwise agreed when ordering (see B.6) the number of products to be inspected for their shape and dimensions is left to the discretion of the

48、 inspector. 5.2.2 Sampling 5.2.2.1 The general conditions for selection and preparation of samples and test pieces shall be in accordance with ISO 377 and ISO 14284. 5.2.2.2 For the Brinell hardness test the surface of the sample product or of a test piece taken from the sample product in the delive

49、ry condition shall be prepared in accordance with the requirements of ISO 6506. 5.2.3 Test methods 5.2.3.1 The Brinell hardness test shall be made in accordance with ISO 6506. 5.2.3.2 Unless otherwise agreed (see B.5), the surface quality shall be inspected visually. 5.2.4 Retests For retests, ISO 404 shall apply. 6 Marking The manufacturer shall mark the products or the bundles or boxes containing the products in a suitable way, so that the identification of the cast, the steel type and the origin of the delivery is possible (se