1、BSI Standards Publication PD ISO/TR 25901-4:2016 Welding and allied processes Vocabulary Part 4: Arc weldingPD ISO/TR 25901-4:2016 PUBLISHED DOCUMENT National foreword This Published Document is the UK implementation of ISO/TR 25901-4:2016. The UK participation in its preparation was entrusted to Te
2、chnical Committee WEE/1, Briefing committee for welding. 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 provisions of a contract. Users are responsible for its correct application. The
3、British Standards Institution 2016. Published by BSI Standards Limited 2016 ISBN 978 0 580 82461 6 ICS 01.040.25; 25.160.10 Compliance with a British Standard cannot confer immunity from legal obligations. This Published Document was published under the authority of the Standards Policy and Strategy
4、 Committee on 31 March 2016. Amendments issued since publication Date Text affectedPD ISO/TR 25901-4:2016 ISO 2016 Welding and allied processes Vocabulary Part 4: Arc welding Soudage et techniques connexes Vocabulaire Partie 4: Soudage larc TECHNICAL REPORT ISO/TR 25901-4 Reference number ISO/TR 259
5、01-4:2016(E) First edition 2016-03-15PD ISO/TR 25901-4:2016ISO/TR 25901-4:2016(E)ii ISO 2016 All rights reserved COPYRIGHT PROTECTED DOCUMENT ISO 2016, Published in Switzerland All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any
6、 form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below or ISOs member body in the country of the requester. ISO copyright office Ch. de Blan
7、donnet 8 CP 401 CH-1214 Vernier, Geneva, Switzerland Tel. +41 22 749 01 11 Fax +41 22 749 09 47 copyrightiso.org www.iso.orgPD ISO/TR 25901-4:2016ISO/TR 25901-4:2016(E)Foreword iv 1 Scope . 1 2 T erms and definitions . 1 2.1 Terms related to welding procedures . 1 2.2 Terms related to welding execut
8、ion 2 2.3 Terms related to welding process characteristics 3 2.4 Terms related to welding consumables . 6 2.5 Terms related to characteristics of welding power source . 8 2.6 Terms related to welding equipment 8 Annex A (informative) Alphabetical inde x of Eng lish t erms with F r ench and German tr
9、 anslations 10 Annex B (informative) Alphabetical inde x of ar c w elding r elat ed t erms defined in ISO 857- 1:1998 that w er e not included in this part of ISO/TR 25901 .14 Bibliography . 18 ISO 2016 All rights reserved iii C ont ents PagePD ISO/TR 25901-4:2016ISO/TR 25901-4:2016(E) Foreword ISO
10、(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 out through ISO technical committees. Each member body interested in a subject for which a technical comm
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13、ed in accordance with the editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives). Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rig
14、hts. Details of any patent rights identified during the development of the document will be in the Introduction and/or on the ISO list of patent declarations received (see www.iso.org/patents). Any trade name used in this document is information given for the convenience of users and does not consti
15、tute an endorsement. For an explanation on the meaning of ISO specific terms and expressions related to conformity assessment, as well as information about ISOs adherence to the WTO principles in the Technical Barriers to Trade (TBT), see the following URL: Foreword Supplementary information. The co
16、mmittee responsible for this document is ISO/TC 44, Welding and allied processes, Subcommittee SC 7, Representation and terms, in collaboration with Commission VI, Terminology of the International Institute of Welding (IIW ). This first edition of ISO/TR 259013, together with the other parts of ISO/
17、TR 25901, cancels and replaces ISO 8571:1998 and ISO/TR 25901:2007, of which it constitutes a revision. ISO/TR 25901 consists of the following parts, under the general title Welding and allied processes Vocabulary: Part 1: General terms Technical Report Part 3: Welding processes Technical Report Par
18、t 4: Arc welding Technical Report The following parts are under preparation: Part 2: Safety and health Technical Report Friction welding is to form the subject of a future part 5. Requests for official interpretations of any aspect of this International Standard should be directed to the Secretariat
19、 of ISO/TC 44/SC 7 via your national standards body. A complete listing of these bodies can be found at www.iso.org.iv ISO 2016 All rights reservedPD ISO/TR 25901-4:2016TECHNICAL REPORT ISO/TR 25901-4:2016(E) Welding and allied processes Vocabulary Part 4: Arc welding 1 Scope This part of ISO/TR 259
20、01 contains terms and definitions applicable to arc welding. It does not contain terms and definitions related to specific processes or particular aspects of welding and allied processes that are covered in other parts of this Technical Report (see Foreword) or in other ISO standards. In the main bo
21、dy of this part of ISO/TR 25901, terms are arranged in a systematic order. Annex A provides an index in which all terms are listed alphabetically with reference to the appropriate subclause. In addition, it provides French translations, covering two of the three official ISO languages (English, Fren
22、ch and Russian). German translations are also provided; these are published under the responsibility of the member body for Germany (DIN), and are given for information only. NOTE 1 Only the terms given in the official languages (English, French and Russian) are to be considered as ISO terms and def
23、initions. NOTE 2 All these terms and definitions are also available on the ISO Online Browsing Platform (OBP): h t t p s :/ www.iso.org/obp/ui/ 2 T erms a nd definiti ons For the purposes of this document, the following terms and definitions apply. 2.1 T erms r elat ed t o w elding pr oc edur es 2.1
24、.1 pulsed MAG welding MAG welding using a pulsed current Note 1 to entry: Acronym MAG stands for Metal Active Gas; the shielding gas used typically consists of a mixture containing 0,5 % or more of oxygen or carbon dioxide. 2.1.2 pulsed MIG welding MIG welding using a pulsed current Note 1 to entry:
25、 Acronym MIG stands for Metal Inert Gas; the shielding gas used typically consists of argon, helium or a mixture of both. 2.1.3 pulsed TIG welding TIG welding using a pulsed current Note 1 to entry: Acronym TIG stands for Tungsten Inert Gas; the shielding gas used typically consists of argon, helium
26、 or a mixture of both. 2.1.4 a r c s p o t w e l d i n g arc welding in which the overlapping parts are joined by fusing through one part into the other and so producing a fusion weld at the faying surfaces ISO 2016 All rights reserved 1PD ISO/TR 25901-4:2016ISO/TR 25901-4:2016(E) 2.1.5 M I G s p o
27、t w e l d i n g arc spot welding (2.1.4) by MIG process Note 1 to entry: Acronym MIG stands for Metal Inert Gas; the shielding gas used typically consists of argon, helium or a mixture of both. 2.1.6 T I G s p o t w e l d i n g arc spot welding (2.1.4) by TIG welding Note 1 to entry: Acronym TIG sta
28、nds for Tungsten Inert Gas; the shielding gas used typically consists of argon, helium or a mixture of both. 2 .1 .7 microplasma arc welding plasma arc welding at welding currents (2.2.8) generally below 10 A 2 .1 . 8 narrow gap welding arc welding in which the distance or angle between the faces of
29、 the parent materials is so small that particular welding equipment has to be used Note 1 to entry: Generally employed to join high thickness workpieces in order to reduce the amount of filler material to use. 2.2 T erms r elat ed t o w elding e x ecution 2.2.1 p us h techni q u e f o re han d w e l
30、 ding welding technique in which the electrode is pushed in the welding direction Note 1 to entry: The electrode angle (2.2.10) is greater than 90. 2.2.2 p ull techni q u e backhand welding welding technique in which the electrode is pulled in the welding direction Note 1 to entry: The electrode ang
31、le (2.2.10) is less than or equal to 90. 2.2.3 weaving welding technique where the run is produced by oscillating the electrode transversely to the direction of welding 2.2.4 w ea v ing w i d t h transverse extent of weaving (2.2.3) 2.2.5 w ea v ing am p li t u d e half of the weaving width (2.2.4)
32、2.2.6 w ea v ing f req u e n c y number of oscillatory movements per unit time 2. 2. 7 weave bead run formed using weaving (2.2.3)2 ISO 2016 All rights reservedPD ISO/TR 25901-4:2016ISO/TR 25901-4:2016(E) 2. 2.8 w el d i n g c u r r en t current delivered by a welding power source during welding 2.2
33、.9 work angle angle between the electrode axis and the surface of the parts, measured in a plane perpendicular to the weld 2.2.10 e le c t r o de a n g le t o r c h a n g l e angle between the electrode axis and the longitudinal axis in the direction of welding 2.2.11 t r a v e l a n g l e angle com
34、plementary to the electrode angle (2.2.10) 2.2.12 w i r e f e e d r a t e w i r e f e e d s p e e d length of wire consumed per unit time 2.2.13 c ont ac t e le c t r o de covered electrode (2.4.1) with a special covering that enables it to be kept in contact with the parent material during welding
35、to facilitate control of arc length (2.3.12) 2.3 T erms r elat ed t o w elding pr oc ess char act eristics 2.3.1 m e t a l t r a n s f e r d r o p l e t t r a n s f e r transfer of molten metal across the arc from a consumable electrode to the weld pool 2.3.2 g lobu l a r t r a n s f e r metal trans
36、fer (2.3.1) in which droplets of diameter larger than that of the wire electrode (2.4.9) are transferred 2.3.3 s p r a y t r a n s f e r metal transfer (2.3.1) in which rapidly accelerated droplets of diameter smaller than that of the wire electrode (2.4.9) are transferred 2.3.4 d i p t r a n s f e
37、r sh o r t c i r c u i t i n g t r a n s f e r metal transfer (2.3.1) in which a short circuiting current enhances the detachment of the molten wire tip during bridging by the electromagnetic pinch effect 2.3.5 p a r t i c l e t r a n s f e r f r e q u e n c y d r o p l e t t r a n s f e r f r e q u
38、 e n c y frequency with which metal globules or droplets are transferred across the arc from the end of a consumable electrode 2.3.6 main arc in plasma arc welding, arc that supplies the welding heat ISO 2016 All rights reserved 3PD ISO/TR 25901-4:2016ISO/TR 25901-4:2016(E) 2 . 3 .7 p i l o t a r c
39、low current arc between the electrode and the constricting nozzle of the plasma torch (2.6.6) to ionize the gas and facilitate the start of the main arc (2.3.6) 2 . 3 . 8 t r a n s f e r r e d a r c arc established between the electrode of the plasma torch (2.6.6) and the workpiece 2.3.9 n o n - t r
40、 a n s f e r r e d a r c arc established between the electrode and the constricting nozzle of the plasma torch (2.6.6) or thermal spraying gun Note 1 to entry: The workpiece does not form part of the electrical circuit. 2.3.10 a r c v o l t a g e electrical potential between the electrode and the wo
41、rkpiece 2.3.11 s t r i k i n g v o l t a g e minimum voltage at which any specific arc may be initiated 2.3.12 a r c l e n g t h distance from the tip of the welding electrode to the surface of the weld pool Note 1 to entry: During welding with consumable electrode processes, the actual length may v
42、ary depending on the metal transfer (2.3.1) process as metal droplets form and transfer to the weld pool. 2.3.13 a r c t i m e arc ing t im e time during which the arc is maintained 2.3.14 p u l s e t i m e pu l s e du r at ion duration of a single pulse 2.3.15 d u t y c y c l e d u t y f a c t o r
43、ratio, for a given time interval, of the uninterrupted on-load duration to the total time 2.3.16 arc blow m a g n e t i c a r c b l o w magnetic deflection of the arc from its intended direction 2 . 3 . 17 st an d -o f f dist an c e distance between the gas nozzle and the workpiece Note 1 to entry:
44、Stand-off distance is illustrated in Figure 1 as item 3. 2 . 3 .18 s t ic k ou t distance between the gas nozzle and end of the wire electrode (2.4.9) Note 1 to entry: Stickout is illustrated in Figure 1 as item 4.4 ISO 2016 All rights reservedPD ISO/TR 25901-4:2016ISO/TR 25901-4:2016(E) 2.3.19 el e
45、 c t r o d e e x t en s i o n distance between the contact tip (2.6.2) or collet (2.6.1) and end of the wire electrode (2.4.9) Note 1 to entry: Electrode extension is illustrated in Figure 1 as item 5. 2.3.20 c o n t a c t t i p d i s t a n c e c o n t a c t t u b e d i s t a n c e distance between
46、the contact tip (2.6.2) and the welding point Note 1 to entry: Contact tip distance is illustrated in Figure 1 as item 6. Key 1 contact tip 4 stickout 7 welding point 2 gas nozzle 5 electrode extension 8 workpiece 3 stand-off distance 6 contact tip distance F i g u r e 1 D i s t a n c e s 2.3.21 d e
47、p o s it i o n c o ef f i c i en t for a given electrode, the mass of weld metal deposited under standard conditions per ampere-minute expressed in mass/(current time) 2.3.22 dep o s i t ion ef f ic ienc y for a covered electrode (2.4.1), ratio of the mass of weld metal deposited under standard cond
48、itions to the total mass consumed, excluding the stub end (2.4.21) 2.3.23 e f f e c t i v e e l e c t r o d e e f f i c i e n c y for a covered electrode (2.4.1), the ratio of the mass of weld metal deposited under standard conditions to the mass of core wire consumed ISO 2016 All rights reserved 5P
49、D ISO/TR 25901-4:2016ISO/TR 25901-4:2016(E) 2.3.24 nom i n a l e le c t r o de ef f ic ienc y for a covered electrode (2.4.1), the ratio of the mass of weld metal deposited under standard conditions to the mass of nominal diameter core wire consumed 2.3.25 o v e r a l l w e l d m e t a l r e c o v e r y for a covered electrode (2.4.1), the ratio of the mass of weld metal deposited under standard conditions to the total mass of the electrode tested, including covering and stub end (2.4.21) 2.3.26 e le c t r o
