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1、 Reference number ISO 14373:2006(E) ISO 2006 INTERNATIONAL STANDARD ISO 14373 First edition 2006-08-15 Resistance welding Procedure for spot welding of uncoated and coated low carbon steels Soudage par rsistance Mode opratoire pour le soudage par points des aciers bas carbone revtus et non revtus IS
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5、en below. ISO 2006 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or ISOs member
6、 body in the country of the requester. ISO copyright office Case postale 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in Switzerland ii ISO 2006 All rights reserved ISO 14373:2006(E) ISO 2006 All rights reserved iii Contents Page
7、 Foreword iv 1 Scope 1 2 Normative references2 3 Terms and definitions .2 4 Symbols and abbreviated terms 4 5 Material .4 5.1 Form4 5.2 Steel grades4 6 Surface conditions.5 7 Edge conditions, form of component, and weld spacing5 8 Electrodes.5 8.1 Materials .5 8.2 Dimensions.5 8.3 Cooling of electro
8、des7 9 Weld assessment.8 9.1 General8 9.2 Weldability tests.8 9.3 Production tests.8 9.4 Frequency of testing .8 10 Weld quality requirements9 10.1 Weld diameter 9 10.2 Weld penetration and indentation9 10.3 Weld fracture mode .9 10.4 Weld shear strength 9 10.5 Weld appearance .10 11 Multi-weld arra
9、ys10 Annex A (informative) Recommendations for spot welding equipment12 Annex B (informative) Typical spot welding conditions .13 Annex C (informative) Partial list of steel types applicable to this International Standard.15 Bibliography16 -,-,- ISO 14373:2006(E) iv ISO 2006 All rights reserved Fore
10、word 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 out through ISO technical committees. Each member body interested in a subject for which a techn
11、ical 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 collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
12、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 International Standards. Draft International Standards adopted by the technical committees are circulated to
13、 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 elements of this document may be the subject of patent rights. ISO shall not be held responsible for
14、identifying any or all such patent rights. ISO 14373 was prepared by the International Institute of Welding, recognized as an international standardizing body in the field of welding in accordance with Council Resolution 42/1999. Requests for official interpretations of any aspect of this Internatio
15、nal Standard should be directed to the ISO Central Secretariat, who will forward them to the IIW Secretariat for an official response. INTERNATIONAL STANDARD ISO 14373:2006(E) ISO 2006 All rights reserved 1 Resistance welding Procedure for spot welding of uncoated and coated low carbon steels 1 Scop
16、e This International Standard specifies requirements for resistance spot welding in the fabrication of assemblies of uncoated and metallic coated low carbon steel, comprising two or three sheets of metal, where the maximum single sheet thickness of components to be welded is within the range 0,4 mm
17、to 3 mm, for the following materials: uncoated steels; hot-dip zinc or iron-zinc alloy (galvannealed) coated steel; electrolytic zinc, zinc-iron, or zinc-nickel coated steel; aluminium coated steel; zinc-aluminium coated steel. This International Standard is applicable to the welding of sheets of th
18、e same or dissimilar thickness, where the thickness ratio is less than or equal to 3:1. It applies to the welding of three thicknesses, where the total thickness is less than or equal to 9 mm. Welding with the following types of equipment is within the scope of this International Standard: a) pedest
19、al welding equipment; b) gun welders; c) automatic welding equipment where the components are fed by robots or automatic feeding equipment; d) multi welders; e) robotic welders. Information on appropriate welding equipment is given in Annex A, and information on spot welding conditions is given in A
20、nnex B. This information is provided for guidance only. Depending on the service conditions of the fabrication, the type of welding equipment, the characteristics of the secondary circuit, the electrode material, and the shape, it is possible that certain modifications are necessary. In such cases,
21、further information may be obtained from the relevant application standard, where one exists. The welding of organic coated or primer coated steels is not within the scope of this International Standard. ISO 14373:2006(E) 2 ISO 2006 All rights reserved 2 Normative references The following referenced
22、 documents are indispensable 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 669, Resistance welding Resistance welding equipment Mechanical and e
23、lectrical requirements ISO 5182, Welding Materials for resistance welding electrodes and ancillary equipment ISO 10447, Welding Peel and chisel testing of resistance spot, projection and seam welds ISO 14270, Specimen dimensions and procedure for mechanized peel testing resistance spot, seam and emb
24、ossed projection welds ISO 14329, Resistance welding Destructive tests of welds Failure types and geometric measurements for resistance spot, seam and projection welds ISO 15609-5, Specification and qualification of welding procedures for metallic materials Welding procedure specification Part 5: Re
25、sistance welding ISO 15614-12, Specification and qualification of welding procedures for metallic materials Welding procedure test Part 12: Spot, seam and projection welding 3 Terms and definitions For the purposes of this document, the terms and definitions given in ISO 669, ISO 14329, and the foll
26、owing apply. 3.1 corona bond zone area of the weld at the faying surfaces in which solid phase bonding has occurred See Figure 2. 3.2 cross-tension test test to determine the load-carrying capability of a spot welded joint subjected to cross tension loading 3.3 shear test tensile shear test test to
27、determine the load-carrying capability of a spot welded joint subjected to shear tension loading 3.4 weld nugget lenticular zone in a resistance weld, where metal from both (all) sheets has melted and re-solidified 3.5 weld pitch centre-to-centre distance between adjacent spot welds ISO 14373:2006(E
28、) ISO 2006 All rights reserved 3 a) Symmetrical a b) Asymmetrical a c) Partial b Key 1 interfacial fracture a d = dp = (d1 + d2)/2. b d = (d1 + d2)/2 and dp = (d2 + d3)/2. Figure 1 Measuring of weld size for weld with plug (slug) failure -,-,- ISO 14373:2006(E) 4 ISO 2006 All rights reserved Key 1 s
29、heared nugget a Diameter of the corona. 2 corona bond zone b Diameter of the nugget. 3 nugget c d1 or d2. 4 rough fracture zone Figure 2 Measuring of weld size for weld with interface failure, d 0,4 u 0,6 4 0,9 to 1,1 5 to 7 4 to 6 1,3 to 1,8 4 to 5 5 to 8 0,6 u 0,8 4 1,2 to 1,3 7 to 10 5 to 7 1,7 t
30、o 2,0 6 to 8 6 to 9 0,8 u 1,0 5 1,4 to 1,5 9 to 12 6 to 8 1,9 to 2,6 7 to 10 7 to 10 1,0 u 1,2 5 1,6 to 1,8 11 to 15 7 to 9 2,5 to 3,2 8 to 12 8 to 12 1,2 u 1,6 6 1,9 to 2,1 14 to 18 8 to 11 3,0 to 4,0 9 to 13 10 to 13 1,6 u 2,0 7 2,6 to 2,9 18 to 22 9 to 13 3,9 to 5,2 10 to 14 12 to 15 2,0 u 2,5 8
31、3,4 to 3,7 22 to 28 10 to 15 5,0 to 6,2 12 to 16 14 to 18 2,5 u 3,0 9 4,4 to 4,7 28 to 35 12 to 17 6,0 to 7,5 15 to 20 17 to 20 a 1 cycle = 0,02 s. -,-,- ISO 14373:2006(E) 14 ISO 2006 All rights reserved Table B.2 Guidelines for spot welding conditions for zinc coated steels of thickness 0,4 mm to 3
32、,0 mm Welding parameters Hot-dip zinc a Electrolytically deposited zinc b Single sheet thickness Electrode tip diameter Force Weld time cycles c Current Force Weld time cycles c Current mm mm mm kN kA kN kA 0,4 u 0,6 4 1,5 to 2,0 6 to 8 7 to 9 1,5 to 2,0 6 to 8 6 to 8 0,6 u 0,8 4 1,9 to 2,0 8 to 10
33、8 to 10 1,9 to 2,2 8 to 10 7 to 9 0,8 u 1,0 5 2,2 to 2,9 9 to 12 9 to 11 2,2 to 2,9 9 to 12 8 to 10 1,0 u 1,2 5 2,8 to 3,6 10 to 13 10 to 13 2,8 to 3,6 10 to 13 9 to 13 1,2 u 1,6 6 3,4 to 4,5 11 to 15 14 to 16 3,4 to 4,5 11 to 15 12 to 15 1,6 u 2,0 7 4,4 to 5,5 12 to 16 18 to 21 4,4 to 5,5 12 to 16
34、14 to 17 2,0 u 2,5 8 5,4 to 6,8 14 to 18 22 to 26 5,4 to 6,8 14 to 18 17 to 22 2,5 u 3,0 9 6,6 to 8,0 17 to 21 26 to 30 6,6 to 8,0 17 to 21 19 to 24 a Applicable for coating thicknesses G275 ( 20 m single side). b Applicable for coating thicknesses 7 m single side. c 1 cycle = 0,02 s. Table B.3 Guid
35、elines for spot welding of double-sided iron-zinc alloy and zinc-nickel alloy coated steels of sheet thickness 0,4 mm to 3,0 mm Welding parameters Single sheet thickness Electrode tip diameter Force Weld time cycles a Current mm mm mm kN kA 0,4 u 0,6 4 1,4 to 1,9 4 to 6 6,0 to 8,5 0,6 u 0,8 4 1,8 to
36、 2,1 6 to 8 7,0 to 9,5 0,8 u 1,0 5 2,1 to 2,8 7 to 10 8,0 to 10,5 1,0 u 1,2 5 2,7 to 3,4 8 to 12 9,0 to 12 1,2 u 1,6 6 3,2 to 4,3 9 to 13 11,0 to 14 1,6 u 2,0 7 4,2 to 5,3 10 to 14 13,0 to 16,5 2,0 u 2,5 8 5,2 to 6,5 12 to 16 16,0 to 21,0 2,5 u 3,0 9 6,4 to 7,8 15 to 20 18,0 to 23 a 1 cycle = 0,02 s
37、. ISO 14373:2006(E) ISO 2006 All rights reserved 15 Annex C (informative) Partial list of steel types applicable to this International Standard C.1 Uncoated steel Sheet and strip material should comply with the general requirements and chemical composition specified in ISO 3574. Hot rolled steel sho
38、uld be in the pickled condition for best results, and should comply with the requirements of ISO 3573 and ISO 4950-1 and ISO 4950-2. C.2 Hot-dip zinc or iron-zinc alloy coated steel Several types of zinc coatings are available with various steel substrates and surface treatments. They should comply
39、with the requirements for hot-dip zinc coated and iron-zinc coated (galvannealed) steel coil and cut lengths, in forming and structural grades specified in ISO 3575 and ISO 4998. Coating types and coating mass should comply with these International Standards; the lower mass zinc coatings and the zin
40、c alloy coatings being the most readily weldable. C.3 Electrolytic zinc coated steel Electrolytic zinc coated steel should be produced by electrolytic deposition of pure zinc onto low carbon steel. The maximum coating thickness should be 15 m nominal ( coating mass of 107 g/m2) on each surface, and
41、should comply with ISO 5002 for the more readily weldable grades. C.4 Electrolytic zinc-nickel or zinc-iron coated steel Such coatings deposited electrolytically should be limited to a maximum coating thickness of 7 m ( coating mass of 51 g/m2) on each surface. C.5 Aluminium coated steel Aluminium c
42、oated steel produced by the hot-dip process, the coating containing 5 % to 11 % silicon, should comply with ISO 5000. Aluminium coated steels may also be produced by a roll bonding technique. Coating mass of up to 150 g/m2 nominal, including both surfaces, is considered the most readily weldable. C.
43、6 Zinc(50-55 %) aluminium coated steel Zinc(50-55) % aluminium coated steel produced by the hot-dip process, with a maximum coating mass of 185 g/m2, including both surfaces for the more readily weldable grades, should comply with ISO 9364. Heavier coating thicknesses can be welded, provided that su
44、itable welding conditions are used. C.7 Zinc5 % aluminium coated steel Zinc5 % aluminium coated steel should be produced by the hot-dip process. The maximum coating mass should be 180 g/m2, including both surfaces for the more readily weldable grades. -,-,- ISO 14373:2006(E) 16 ISO 2006 All rights r
45、eserved Bibliography 1 ISO 3573, Hot-rolled carbon steel sheet of commercial and drawing qualities 2 ISO 3574, Cold-reduced carbon steel sheet of commercial and drawing qualities 3 ISO 3575, Continuous hot-dip zinc-coated carbon steel sheet of commercial and drawing qualities 4 ISO 4950-1, High yiel
46、d strength flat steel products Part 1: General requirements 5 ISO 4950-2, High yield strength flat steel products Part 2: Products supplied in the normalized or controlled rolled condition 6 ISO 4998, Continuous hot-dip zinc-coated carbon steel sheet of structural quality 7 ISO 5000, Continuous hot-
47、dip aluminium-silicon-coated cold-reduced carbon steel sheet of commercial and drawing qualities 8 ISO 5002, Hot-rolled and cold-reduced electrolytic zinc-coated carbon steel sheet of commercial and drawing qualities 9 ISO 5184, Straight resistance spot welding electrodes 10 ISO 5821, Resistance spo
48、t welding electrode caps 11 ISO 5830, Resistance spot welding Male electrode caps 12 ISO 9364, Continuous hot-dip aluminium/zinc-coated steel sheet of commercial, drawing and structural qualities 13 ISO 14327, Resistance welding Procedures for determining the weldability lobe for resistance spot, projection and seam welding -,-,- -,-,- ISO 14373:2006(E) ICS 25.160.10 Price based on 16 pages ISO 2006 All rights reserved