1、 Reference number ISO/TR 17671-4:2002(E) ISO 2002TECHNICAL REPORT ISO/TR 17671-4 First edition 2002-02-01 Welding Recommendations for welding of metallic materials Part 4: Arc welding of aluminium and aluminium alloys Soudage Recommandations pour le soudage des matriaux mtalliques Partie 4: Soudage
2、larc de laluminium et des alliages daluminium ISO/TR 17671-4:2002(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobes licensing policy, this file may be printed or viewed but shall not be edited unless the typefaces which are embedded are licensed to and install
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7、002(E) ISO 2002 All rights reserved iiiContents Page Foreword.iv Introduction.v 1 Scope 1 2 References .1 3 Terms and definitions .2 4 Provision of quality requirements .2 5 Parent metal .2 6 Factors affecting properties of welded structures and assemblies.3 7 Fusion welding processes3 8 Welding con
8、sumables.3 9 Equipment 4 10 Joint types4 11 Backing material 5 12 Branch connections 6 13 Gouging 6 14 Preparation of joint6 15 Assembly for welding7 16 Alignment of joints 7 17 Pre-heating .7 18 Interpass temperature.7 19 Methods of temperature measurement .8 20 Additional recommendations .8 Annex
9、A Detrimental effects on weld properties and measures for their avoidance.10 Annex B Recommendations for the choice of consumables13 ISO/TR 17671-4:2002(E) iv ISO 2002 All rights reservedForeword ISO (the International Organization for Standardization) is a worldwide federation of national standards
10、 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 committee has been established has the right to be represented on that committee. International organiza
11、tions, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO 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 t
12、he ISO/IEC Directives, Part 3. The main task of technical committees is to prepare International 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
13、 the member bodies casting a vote. In exceptional circumstances, when a technical committee has collected data of a different kind from that which is normally published as an International Standard (“state of the art”, for example), it may decide by a simple majority vote of its participating member
14、s to publish a Technical Report. A Technical Report is entirely informative in nature and does not have to be reviewed until the data it provides are considered to be no longer valid or useful. Attention is drawn to the possibility that some of the elements of this part of ISO/TR 17671 may be the su
15、bject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO/TR 17671-4 was prepared by Technical Committee ISO/TC 44, Welding and allied processes, Subcommittee SC 10, Unification of requirements in the field of metal welding. ISO/TR 17671 consists of
16、 the following parts, under the general title Welding Recommendations for welding of metallic materials: Part 1: General guidance for arc welding Part 2: Arc welding of ferritic steels Part 3: Arc welding of stainless steels Part 4: Arc welding of aluminium and aluminium alloys ISO/TR 17671-4:2002(E
17、) ISO 2002 All rights reserved vIntroduction This part of ISO/TR 17671 has been issued with two annexes in order to cover aluminium and the different types of its alloys in all forms which will be produced to the relevant International Standards. In this part of ISO/TR 17671 the term aluminium stand
18、s for aluminium and its alloys. This part of ISO/TR 17671 gives general guidance for the satisfactory design, production and control of welding and details the possible detrimental effects which may occur, together with advice on methods by which they may be avoided. Generally it is applicable to al
19、l types of aluminium materials and is appropriate regardless of the type of fabrication involved, although the application standard/contract may have additional requirements. Permissible design stresses in welds, methods of testing and acceptance levels are not included because they depend on the se
20、rvice conditions of the fabrication. These details should be obtained from the design specification. Informative annexes give information on detrimental effects (see annex A) and choice of consumables (see annex B). This part of ISO/TR 17671 details only welding-related matters and does not give any
21、 details of mechanical properties of the welded joint. This part of ISO/TR 17671 identifies the main factors that affect the welding of aluminium. This will be influenced by parent metal, consumables, design, welding procedure, welding equipment, joint preparation, etc. General requirements for fusi
22、on welding of metallic materials are detailed in ISO/TR 17671-1, in particular: tack welds; temporary attachments; arcing; inter-run cleaning and treatment; welding procedures; identification; inspection and testing; quality requirements; correction of non-conformity; distortion; post-weld heat trea
23、tment; abbreviations and symbols; run-on/ run-off plates. TECHNICAL REPORT ISO/TR 17671-4:2002(E) ISO 2002 All rights reserved 1Welding Recommendations for welding of metallic materials Part 4: Arc welding of aluminium and aluminium alloys 1 Scope This part of ISO/TR 17671 gives general recommendati
24、ons for the manual, mechanized and automatic fusion welding of wrought and cast aluminium alloys and combinations thereof. For general guidelines, see ISO/TR 17671-1. In this part of ISO/TR 17671 the word “pipe” alone, or in combinations, is used to mean “tube” or “hollow section”, although these te
25、rms are often used by different industries for different categories of product. 2 References ISO 3834-2, Quality requirements for welding Fusion welding of metallic materials Part 2: Comprehensive quality requirements ISO 3834-3, Quality requirements for welding Fusion welding of metallic materials
26、Part 3: Standards quality requirements ISO 4063:1998, Welding and allied processes Nomenclature of processes and reference numbers. ISO 6520-1, Welding and allied processes Classification of geometric imperfections in metallic materials Part 1: Fusion welding ISO 6947:1990, Welds Working positions D
27、efinitions of angles of slope and rotation ISO 9606-2, Approval testing of welders Fusion welding Part 2: Aluminium and aluminium alloys. ISO 9692-3, Welding and allied processes Recommendations for joint preparation Part 3: Metal inert gas welding and tungsten inert gas welding of aluminium and its
28、 alloys ISO 9956-1, Specification and approval of welding procedures for metallic materials Part 1: General rules for fusion welding ISO 9956-2, Specification and approval of welding procedures for metallic materials Part 2: Welding procedure specification for arc welding ISO 9956-4, Specification a
29、nd approval of welding procedures for metallic materials Part 4: Welding procedure tests for the arc welding of aluminium and its alloys ISO 10042, Arc-welded joints in aluminium and its weldable alloys Guidance on quality levels for imperfections ISO 14175:1997, Welding consumables Shielding gases
30、for arc welding and cutting ISO/TR 17671-4:2002(E) 2 ISO 2002 All rights reservedISO 14731, Welding coordination Tasks and responsibilities ISO 14732, Welding personnel Approval testing of welding operators for fusion welding and of resistance weld setters for fully mechanized and automatic welding
31、of metallic materials ISO/TR 15608, Welding Guidelines for a metallic materials grouping system ISO 15614-4, Specification and approval of welding procedures for metallic materials Welding procedure test Part 4: Arc welding of aluminium castings ISO/TR 17671-1:, Welding Recommendations for welding o
32、f metallic materials Part 1: General guidance for arc welding EN 573-1, Aluminium and aluminium alloys Chemical composition and form of wrought products Part 1: Numerical designation system EN 573-2, Aluminium and aluminium alloys Chemical composition and form of wrought products Part 2: Chemical sy
33、mbol based designation system EN 573-3, Aluminium and aluminium alloys Chemical composition and form of wrought products Part 3: Chemical composition EN 573-4, Aluminium and aluminium alloys Chemical composition and form of wrought products Part 4: Forms of products EN 1289, Non-destructive examinat
34、ion of welds Penetrant testing of welds Acceptance levels EN 1706, Aluminium and aluminium alloys Castings Chemical composition and mechanical properties EN 1780-1, Aluminium and aluminium alloys Designation of unalloyed and alloyed aluminium ingots for remelting, master alloys and castings Part 1:
35、Numerical designation system EN 1780-2, Aluminium and aluminium alloys Designation of unalloyed and alloyed aluminium ingots for remelting, master alloys and casting Part 2: Chemical symbol based designation system EN 1780-3, Aluminium and aluminium alloys Designation of unalloyed and alloyed alumin
36、ium ingots for remelting, master alloys and castings Part 3: Writing rules for chemical composition 3 Terms and definitions For the purposes of this part of ISO/TR 17671, the terms and definitions of ISO/TR 17671-1 apply. 4 Provision of quality requirements In order to ensure the quality of work, it
37、 should be performed by approved personnel in accordance with e.g. ISO 9606-2, ISO 14732 and ISO 14731 using approved procedures, e.g. ISO 9956-1, ISO 9956-2, ISO 9956-4 and ISO 15614-4. 5 Parent metal 5.1 General This part of ISO/TR 17671 applies to wrought, cast and combinations of aluminium, e.g.
38、 in accordance with ISO 9606-2, ISO 14732, ISO 9956-4 and ISO 15614-4. The principles of this part of ISO/TR 17671 can be applied to other non-standard or proprietary aluminium alloys, which can include the advanced superplastic alloys and ISO/TR 17671-4:2002(E) ISO 2002 All rights reserved 3metal m
39、atrix composites, provided the composition of the alloy falls within the parent metal groups listed in annex B. In such cases, the use of this part of ISO/TR 17671 shall be in accordance with the design specification. Material standards do not fully take into account welding requirements. For this r
40、eason, it is sometimes necessary to specify additional requirements for the material when placing the order. This can include selection/restriction of composition/mechanical properties (within certain additional limits to the basic standard requirements) and additional cleanliness of the components.
41、 Permanent backing material and temporary attachments should be compatible with the parent metal. 5.2 Storage and handling Contact with ferritic materials and copper should be avoided, in order to prevent corrosion. To avoid the use of incorrect materials, they should be stored so that the alloy typ
42、e is known (see warning on hard stamping in ISO/TR 17671-1:). 6 Factors affecting properties of welded structures and assemblies A short list of possible detrimental effects that can occur as a result of welding, is given in annex A. The list is not exhaustive but features those metallurgical and te
43、chnological influences that are specific to, or more prevalent with, aluminium. Potential causes and counter measures are also listed. Consideration shall be given, e.g. in the design of welded structures, to the mechanical properties of the heat affected zone (HAZ) and the weld deposit which can be
44、 influenced by the welding procedure. For instance, the weld deposit and the HAZ can have lower mechanical properties than the parent material. Care should be taken to avoid the creation of any HAZ that has not been considered in the design, e.g. the welding of a temporary attachment. 7 Fusion weldi
45、ng processes This part of ISO/TR 17671 applies to the following processes in accordance with ISO 4063:1998, and may be used singly or in combination. 131 Metal arc inert gas welding (MIG); 141 Tungsten inert gas arc welding (TIG); 15 Plasma arc welding. Other fusion welding processes may be consider
46、ed by agreement. 8 Welding consumables 8.1 Filler metal The filler metal should be compatible with the parent metal, see annex B. Filler metals should be stored in their original packaging in a dry place adequately protected from the effects of the weather and in accordance with relevant standards a
47、nd/or the suppliers recommendation. ISO/TR 17671-4:2002(E) 4 ISO 2002 All rights reservedParticular attention shall be paid to the storage and identification of partly used reels of wire and packages of rods located in fabricating shops or on site. This is necessary to ensure that they do not become
48、 moist or contaminated, e.g. by dust or oil. 8.2 Shielding gases and gas backing Argon is most commonly used for MIG, TIG and plasma arc welding of aluminium, but some advantage can be obtained by the use of helium and helium/argon mixtures. They produce improved penetration and/or an increase in th
49、e welding speed. They can also reduce imperfections. Shielding gases and gas backing of the following categories in accordance with ISO 14175:1997 shall normally be used. I1 (argon); I2 (helium); I3 (argon/helium mixtures). Other gas mixtures should only be used in accordance with the design specification (see annex B). 9 Equipment Further information is given in ISO 3834-2 and ISO 3834-3. Return cabl
