1、BSI Standards PublicationBS ISO 22068:2012Sintered-metal injection-moulded materials SpecificationsBS EN ISO 22068:2014BS EN ISO 22068:2014 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN ISO 22068:2014. It is identical to ISO 22068:2012. It supersedes BS ISO 22
2、068:2012 which is withdrawn.The UK participation in its preparation was entrusted to Technical Committee ISE/65, Sintered metal components.A list of organizations represented on this committee can be obtained on request to its secretary.This publication does not purport to include all the necessary
3、provisions of a contract. Users are responsible for its correct application. The British Standards Institution 2014. Published by BSI Standards Limited 2014ISBN 978 0 580 83541 4ICS 77.160Compliance with a British Standard cannot confer immunity from legal obligations.This British Standard was publi
4、shed under the authority of the Standards Policy and Strategy Committee on 30 June 2012.Amendments/corrigenda issued since publicationDate Text affected31 May 2014 This corrigendum renumbers BS ISO 22068:2012 as BS EN ISO 22068:2014EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 22068 March
5、 2014 ICS 77.160 English Version Sintered-metal injection-moulded materials - Specifications (ISO 22068:2012) Matriaux mtalliques fritts pour moulage par injection - Spcifications (ISO 22068:2012) Sintermetallpulverspritzguss - Anforderungen (ISO 22068:2012) This European Standard was approved by CE
6、N on 2 March 2014. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards m
7、ay be obtained on application to the CEN-CENELEC Management Centre or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified
8、 to the CEN-CENELEC Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Icelan
9、d, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Managem
10、ent Centre: Avenue Marnix 17, B-1000 Brussels 2014 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 22068:2014 EEN ISO 22068:2014 (E) 3 Foreword The text of ISO 22068:2012 has been prepared by Technical Committee ISO/TC 119 “Pow
11、der metallurgy” of the International Organization for Standardization (ISO) and has been taken over as EN ISO 22068:2014. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by September 2014, and confli
12、cting national standards shall be withdrawn at the latest by September 2014. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. According
13、 to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Gre
14、ece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. Endorsement notice The text of ISO 22068:2012 has been approved by CEN as EN ISO 22068:2014 with
15、out any modification. BS EN ISO 22068:2014EN ISO 22068:2014 (E)BS ISO 22068:2012ISO 22068:2012(E) ISO 2012 All rights reserved iiiContents Page Foreword iv 1 Scope 1 2 Normative references 1 3 Terms and definitions . 2 4 Test methods for normative properties 2 4.1 General . 2 4.2 Chemical compositio
16、n 2 4.3 Density 2 4.4 Tensile strength . 2 4.5 Tensile yield strength 3 4.6 Elongation 3 4.7 Magnetic properties 3 5 Other test methods 3 5.1 Hardness 3 5.2 Corrosion resistance . 3 5.2.1 Sulfuric acid test 3 5.2.2 Copper sulfate test 3 5.2.3 Boiling water test . 3 5.2.4 Salt spray test 3 6 Informat
17、ion and explanatory notes . 4 6.1 Minimum value concept 4 6.2 Minimum mechanical property values 4 6.3 Proof testing 4 6.4 Chemical composition 4 6.5 Density and residual porosity 4 6.6 Heat treatment . 4 7 Designation of materials . 5 7.1 Designation system . 5 7.2 Description block 5 7.3 Identity
18、block . 5 7.4 Individual item block . 5 8 Material specifications 6 Bibliography 11 BS ISO 22068:2012ISO 22068:2012(E) ISO 2012 All rights reserved iiiContents Page Foreword iv1 Scope 12 Normative references 13 Terms and definitions . 24 Test methods for normative properties 2 4.1 General . 2 4.2 Ch
19、emical composition 2 4.3 Density 2 4.4 Tensile strength . 2 4.5 Tensile yield strength 3 4.6 Elongation 3 4.7 Magnetic properties 35 Other test methods 3 5.1 Hardness 3 5.2 Corrosion resistance . 3 5.2.1 Sulfuric acid test 3 5.2.2 Copper sulfate test 3 5.2.3 Boiling water test . 3 5.2.4 Salt spray t
20、est 36 Information and explanatory notes . 4 6.1 Minimum value concept 4 6.2 Minimum mechanical property values 4 6.3 Proof testing 4 6.4 Chemical composition 4 6.5 Density and residual porosity 4 6.6 Heat treatment . 47 Designation of materials . 5 7.1 Designation system . 5 7.2 Description block 5
21、 7.3 Identity block . 5 7.4 Individual item block . 58 Material specifications 6Bibliography 11 BS EN ISO 22068:2014ISO 22068:2012(E)This page deliberately left blankBS ISO 22068:2012INTERNATIONAL STANDARD ISO 22068:2012(E) ISO 2012 All rights reserved 1Sintered-metal injection-moulded materials Spe
22、cifications 1 Scope This International Standard specifies the requirements for the chemical composition and the mechanical and physical properties of sintered-metal injection-moulded materials. It is intended to provide design and materials engineers with necessary information for specifying materia
23、ls in components manufactured by means of the Metal Injection Moulding (MIM) process only. It does not apply to structural parts manufactured by other powder metallurgy routes, such as press-and-sinter or powder-forging technologies. 2 Normative references The following referenced documents are indi
24、spensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 2740, Sintered materials, excluding hardmetals Tensile test pieces ISO 3369, Impermeable
25、 sintered metal materials and hardmetals Determination of density ISO 4498, Sintered metal materials, excluding hardmetals Determination of apparent hardness and micro-hardness ISO 6507-1, Metallic materials Vickers hardness test Part 1: Test method ISO 6508-1, Metallic materials Rockwell hardness t
26、est Part 1: Test method (scales, A, B, C, E, F, G, H, K, N, T) ISO 6892-1, Metallic materials Tensile testing Part 1: Method of test at room temperature ISO 9227, Corrosion tests in artificial atmospheres Salt spray tests IEC 60404-4, Magnetic materials Part 4: Methods of measurement of d.c. magneti
27、c properties of magnetically soft materials ASTM D2638, Standard Test Method for Real Density of Calcined Petroleum Coke by Helium Pycnometer ASTM D4892, Standard Test Method for Density of Solid Pitch (Helium Pycnometer Method) BS EN ISO 22068:2014BS ISO 22068:2012ISO 22068:2012(E) 2 ISO 2012 All r
28、ights reserved3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 tensile strength Rmability of a test specimen to resist fracture when a pulling force is applied in a direction parallel to its longitudinal axis, expressed in MPa 3.2 tensile yiel
29、d strength Rp0,2load at which the material exhibits a 0,2 % offset from proportionality on a stress-strain curve in tension, divided by the original cross-sectional area, expressed in MPa 3.3 elongation A25plastic elongation, expressed as a percentage of the original gauge length of the specimen NOT
30、E The elastic strain at the 0,2 % yield strength must be subtracted from the total elongation to give the plastic elongation. 3.4 density mass per unit volume of the material, expressed in g/cm33.5 hardness resistance of a PM material to indentation, tested under specified conditions 4 Test methods
31、for normative properties 4.1 General The following test methods shall be used to determine the normative properties given in Tables 1 to 6. 4.2 Chemical composition Whenever possible, and always in cases of dispute, the methods of chemical analysis shall be those specified in the relevant Internatio
32、nal Standards. If no International Standard is available, the method may be agreed upon and specified at the time of enquiry and order. 4.3 Density The density shall be determined in accordance with ISO 3369 or by gas pycnometer measurement in accordance with ASTM D2638 or ASTM D4892 as stipulated a
33、t the time of enquiry and order. 4.4 Tensile strength The ultimate tensile strength shall be determined in accordance with ISO 2740 and ISO 6892-1. BS EN ISO 22068:2014ISO 22068:2012(E)BS ISO 22068:2012ISO 22068:2012(E) ISO 2012 All rights reserved 34.5 Tensile yield strength The tensile yield stren
34、gth shall be determined in accordance with ISO 2740 and ISO 6892-1. 4.6 Elongation The elongation shall be determined in accordance with ISO 2740 and ISO 6892-1. 4.7 Magnetic properties The maximum permeability and magnetic induction at an applied field of 1 990 A/m (25 Oe) shall be determined in ac
35、cordance with IEC 60404-4. 5 Other test methods 5.1 Hardness The hardness shall be determined in accordance with ISO 4498, ISO 6507-1 and ISO 6508-1. 5.2 Corrosion resistance Four corrosive media and test methods (see 5.2.1 to 5.2.4) are used to rate the corrosion resistance of MIM stainless-steel a
36、lloys. 5.2.1 Sulfuric acid test The standard un-notched Charpy test specimens (10 mm 5 mm 55 mm) are immersed in a 2 % by mass sulfuric acid solution at room temperature for 1 000 h. Three replicates are tested. The loss in mass for each is determined in accordance with MPIF Standard 62, and then co
37、nverted into mass loss per surface area per day in units of gram per square decimetre day g/(dm2)(day). 5.2.2 Copper sulfate test The test specimens or test parts are immersed in a copper sulfate solution (dissolve 1 g of cupric sulfate crystals in a mixture of 22,5 ml of distilled water and 2,5 g o
38、f sulfuric acid) for 6 min ( 30 s) at a temperature of 17 to 20 C. Specimens that show no sign of copper plating are classified as passing this test (see ASTM F1089). 5.2.3 Boiling water test The test specimen or test parts are immersed in distilled water, then brought to a boil and held for (30 1)
39、min. After the 30 min exposure remove from the heat source and let the specimens remain in the water for 3 h 15 min. The specimens are then removed and left to dry in still air for 2 h 10 min. Specimens that show no visible corrosion are classified as passing this test (see ASTM F1089). 5.2.4 Salt s
40、pray test Criteria for the salt spray test in accordance with ISO 9227 shall be determined between the manufacturer and the customer. BS EN ISO 22068:2014ISO 22068:2012(E)BS ISO 22068:2012ISO 22068:2012(E) 4 ISO 2012 All rights reserved6 Information and explanatory notes 6.1 Minimum value concept Th
41、is International Standard has adopted the concept of minimum mechanical and magnetic property values. These values may be used for determining the material most suited for a particular application if the part is manufactured by means of the MIM process. 6.2 Minimum mechanical property values The min
42、imum values for the MIM materials are expressed in terms of ultimate tensile strength, yield strength (0,2 % offset), and percent elongation to fracture. Values are reported for structural materials in both the as-sintered and heat-treated condition (where applicable). The tensile properties used fo
43、r establishing this International Standard were obtained from tensile specimens prepared according to ISO 2740. Tensile properties obtained from test specimens prepared by machining of non-standard specimens, or from non-standard specimens directly, may differ from those prepared according to ISO 27
44、40. Evidence of mechanical properties for a particular component shall therefore be based on the tensile properties measured using specimens prepared according to ISO 2740. These specimens shall be manufactured from the same batch of material as the components, have the same density and be sintered
45、and heat treated (if required) along with the components. Defects introduced during the MIM processing of particular components may limit the tensile properties. Non-destructive evaluation of the parts can be necessary to ensure that the minimum property specifications according to this Internationa
46、l Standard are met, if proof testing is not used. 6.3 Proof testing The practical method for demonstrating the strength of a component is through static or dynamic testing stipulated by the supplier and/or user of the MIM part. This proof test should be as closely related to the actual function of t
47、he part as possible, as provided by break load, bend test, pull test, etc. For example, it may be agreed that the break load should be greater than a given value. If that load is exceeded in proof tests, the minimum strength is demonstrated. In an alternative method, the first batch of parts can als
48、o be tested in service and demonstrated to be acceptable. The static or dynamic load to fracture is determined separately and these data are statistically analysed to determine a minimum break load for future production batches. Exceeding that minimum load on future lots of these parts is proof that
49、 the specified strength requirement has been met. 6.4 Chemical composition The chemical composition of each material lists the principal alloying elements by minimum and maximum percentage. Other elements include the total other elements by difference and are listed as a maximum value in mass percent. 6.5 Density and residual porosity MIM materials are normally processed to near full density. If not otherwise specified, MIM materials contain less than 5 % residual porosity. The pores are finely dispersed, mainly withi
