BS 7363-1990 Method for bead-on-plate (BOP) test for welds《焊接用受控热强度试验和叠珠焊缝板试验方法》.pdf

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1、BRITISH STANDARD BS 7363:1990 Incorporating Amendment Nos. 1 and 2 Method for bead-on-plate (BOP) test for welds ICS 25.160.40 BS 7363:1990 This British Standard, having been prepared under the direction of the Welding Standards Policy Committee, was published under the authority of the Standards Bo

2、ard and comes into effect on 30 November 1990 BSI 30 November 2004 The following BSI references relate to the work on this standard: Committee reference WEE/2 Draft for comment 89/75604 DC ISBN 0 580 18963 5 Committees responsible for this British Standard The preparation of this British Standard wa

3、s entrusted by the Welding Standards Policy Committee (WEE/-) to Technical Committee WEE/2, upon which the following bodies were represented: Aluminium Federation Associated Offices Technical Committee Association of Consulting Scientists British Compressed Gases Association British Constructional S

4、teelwork Association Ltd. British Railways Board British Steel Industry Electricity Supply Industry in England and Wales Health and Safety Executive Institution of Structural Engineers Ministry of Defence Power Generation Contractors Association (BEAMA Ltd.) Welding Institute Welding Manufacturers A

5、ssociation (BEAMA Ltd.) Amendments issued since publication Amd. No. Date Comments 9161 November 1996 15295 30 November 2004 Indicated by a sideline in the marginBS 7363:1990 BSI 30 November 2004 i Contents Page Committees responsible Inside front cover Foreword ii Section 1. General 1.1 Scope 1 1.2

6、 Definitions 1 1.3 Measurements 1 1.4 Material for test pieces 1 Section 2. Deleted Section 3. BOP test 3.1 Application 5 3.2 Test piece form 5 3.3 Welding 5 3.4 Hardness testing 6 3.5 Recording of results 6 Appendix A Deleted 8 Appendix B Typical TRS for BOP test 9 Figure 1 Deleted Figure 2 Deleted

7、 Figure 3 Deleted Figure 4 Deleted Figure 5 Deleted Figure 6 Deleted Figure 7 Deleted Figure 8 Details of test plate and sectioning for BOP test 7 Figure 9 Location of hardness impressions for BOP test 7 Table 1 Deleted Table 2 Welding conditions for the standardized BOP test 6 Publication(s) referr

8、ed to 11BS 7363:1990 ii BSI 30 November 2004 Foreword This British Standard has been prepared under the direction of the Welding Standards Policy Committee. The BOP test is used to investigate weld HAZ hardening behaviour. Tests are normally performed for the evaluation of parent material characteri

9、stics. Tests may also be used to investigate welding consumables and welding parameters. The controlled thermal severity (CTS) test for welds is now described in BS EN ISO 17641-2:2004. It has been assumed in the drafting of this British Standard that the execution of its provisions is entrusted to

10、appropriately qualified and experienced people. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages T

11、his document comprises a front cover, an inside front cover, pages i and ii, pages 1 to 11 and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued.BS 7363:1990 BSI 30 November 2004 1 Section 1. General 1.1 Scope This British Standard describe

12、s the bead-on-plate (BOP) test for welds. These are intended for investigating the welding of carbon, carbon-manganese and low-alloy steels. Tests are normally performed for the evaluation of parent material characteristics. Tests may also be used to investigate welding consumables and welding param

13、eters. NOTE The titles of the publications referred to in this standard are listed on the inside back cover. 1.2 Definitions For the purposes of this British Standard, the definitions given in BS 499-1 apply. 1.3 Measurements Knowledge of the correct values of the variables involved in producing tes

14、t welds is vital to the success of the tests and calibrated measurement devices shall be used. The values of these measured variables shall be noted on the test report sheet (TRS). NOTE It is recommended that traceability to national standards of calibration is maintained. An individual test involve

15、s many variables, particularly in relation to the materials used, and all the data characterizing the specific test shall therefore be recorded as failure to do this could result in misinterpretation of results. A list of the required variables appears in the relevant TRS (see example given in Appen

16、dix B). 1.4 Material for test pieces The material for the tests shall be in the metallurgical condition in which it will be welded. Where the material to be used is identified by a cast number, this shall be noted in the TRS. Where the principal rolling direction can be determined, this shall be mar

17、ked on the test material by hard stamping remote from the weld testing area. The chemical composition of the material to be tested shall be available. When the test is being performed for material release purposes the product analysis certificate shall be acceptable. In all other circumstances the c

18、hemical analysis shall be performed on the material to be tested and the elements to be determined shall be as follows: carbon silicon manganese phosphorus sulfur chromium molybdenum nickel vanadium copper niobium calcium boron titanium aluminium nitrogen In selecting the technique for analysis and

19、the areas for sampling, care shall be taken to provide average values of elements and to avoid localized effects in the material caused by segregation and surface decarburization.The results and the analytical tolerances shall be entered on the TRS as mass percentages. NOTE It is considered good pra

20、ctice to confirm the accuracy of the analytical technique against certified reference materials.2 blankBS 7363:1990 BSI 30 November 2004 3 Section 2. Deleted4 blankBS 7363:1990 BSI 30 November 2004 5 Section 3. BOP test 3.1 Application The BOP test is simple to execute and evaluate. The BOP test is

21、used solely for measuring HAZ hardness and production of a crack-free test does not give any assurance that other welds deposited in a similar manner will be crack-free. Text deleted. 3.2 Test piece form The minimum dimensions of the test plate shall be 300 mm long and 150 mm wide. The actual size o

22、f plate used shall be entered on the TRS. 3.3 Welding 3.3.1 General Where applicable, perform welding in accordance with BS EN 1011-2. Where there are deviations from this standard, note these in the TRS. 3.3.2 Preparation and preheat Ensure that the surfaces to be welded and to be used for the curr

23、ent return lead attachment are ground smooth and free from scale, rust, oil, grease and other contaminants. When the test requires a preheat, place the test piece in an oven and leave it for sufficient time to ensure even and thorough heating. Set the oven at a higher temperature than required for t

24、he test in order to allow for the cooling of the assembly during transfer and set-up. Prior to any welding, check the temperature of the test piece using a calibrated surface pyrometer. Where the test demands a specific temperature of preheat, do not commence welding until the required temperature i

25、s achieved. Record the temperature on the TRS. 3.3.3 Test piece type In welding the test piece, the following two deposition tests are possible. Type 1. Standardized welding conditions for quality control purposes. Type 2. Discretional deposition conditions for material characterization programmes.

26、The type of test selected shall be stated on the TRS. 3.3.4 Welding the type 1 standardized BOP test Make a mechanized autogenous TIG bead-on-plate weld in accordance with the conditions given in Table 2, the weld being full length along the longitudinal centreline of the plate as shown in Figure 8.

27、 Ensure that the minimum length of weld deposited is 280 mm.BS 7363:1990 6 BSI 30 November 2004 Table 2 Welding conditions for the standardized BOP test 3.3.5 Welding the type 2, discretional welding conditions BOP test Detail the welding process and conditions selected in the TRS. Produce separate

28、TRS sheets for each weld made and individually identify the sheets to each test weld. 3.3.6 Cooling of the test piece Following welding, allow the test plate to cool naturally in still air. 3.4 Hardness testing Section the bead transversely and polish and etch the two faces (as shown in Figure 8) in

29、 accordance with BS EN 1043-1 or by an alternative electropolishing technique capable of giving an equivalent or better preparation. NOTE An etch which reveals the solidification pattern may be necessary to show the position of the fusion boundary in an autogenous weld run. Subject these prepared fa

30、ces to a Vickers hardness test in accordance with BS EN ISO 6507 in the positions indicated in Figure 9. Select the indentation load of 2.5 kg, 5 kg or 10 kg so that the hardness impressions are contained within the grain-coarsened zone of the HAZ and such that five impressions may be accommodated.

31、Discount results from HAZ hardness impressions entering the weld zone, the grain refined zone or the unaffected parent material and make further impressions. Record the results, including the maximum, the minimum and the average values, on the TRS. 3.5 Recording of results All details of the materia

32、ls, their welding and testing shall be presented on a TRS. NOTE A typical form of TRS is shown in Appendix B. Condition Value Welding position Flat Electrode diameter (mm) 2.4 Arc voltage (V) (d.c. negative) 10 0.5 Current (A) 200 5 Travel speed (mm/min) 120 5 Nominal arc energy (KJ/mm) a Preheat (m

33、ax.) ( C) thickness below 20 mm thickness 20mm to 25 mm thickness 26 mm to 30 mm thickness above 30 mm None 75 100 125 a Arc efficiency varies according to the process and this can be allowed for when comparing tests made by different processes as detailed in BS 5135.BS 7363:1990 BSI 30 November 200

34、4 7 Figure 8 Details of test plate and sectioning for BOP test NOTE The distance of any indentation should be not less than that permitted by BS 427 for the previous indentation Figure 9 Location of hardness impressions for BOP testBS 7363:1990 8 BSI 30 November 2004 Appendix A DeletedBS 7363:1990 B

35、SI 30 November 2004 9 Appendix B Typical TRS for BOP test BOP test Test record sheet Description of investigation Date Type of test Test no. Cast no. Other details Material thickness, mm Rolling direction indicated Y/N Composition C % Si % Mn % P % S % Cr % Mo % Ni % V % Cu % Nb % Ca % B % Ti % Al %

36、 N% Welding details Process Parameters Welding consumable Electrode/wire dia. Specification Amperage Classification Voltage Shielding gas/Flux Polarity Baking treatment Travel speed Preheat temperature Gas type Interpass temperature (max.) Gas flow rate L/min Post-heat temperature Arc energy Measuri

37、ng method Metallurgical examination/Hardness testing Section and face Hardness test results, HV_ Comments HAZ* Weld metal Parent metal * Signature Hardness Max. value: Min. value Average value - =10 blankBS 7363:1990 BSI 30 November 2004 11 Publication(s) referred to BS 499, Welding terms and symbol

38、s BS 499-1, Glossary for welding, brazing and thermal cutting BS 5135, Specification for process of arc welding of carbon and carbon manganese steels. BS EN 1011, Welding Recommendations for welding of metallic materials. BS EN 1011-2, Arc welding of ferritic steels. BS EN 1043, Destructive tests on

39、 welds in metallic materials Hardness testing. BS EN 1043-1, Hardness test on arc welded joints. BS EN ISO 6507, Metallic materials Vickers hardness test. BS EN ISO 6507-1, Test method. BS EN ISO 6507-2, Verification of testing machines. BS EN ISO 6507-3, Calibration of reference blocks.BS 7363:1990

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