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1、INTERNATIONAL STANDARD INTERNATIONAL ORGANIZATION FOR STANDARDIZATION ORGANISATION INTERNATIONALE DE NORMALISATION MEXAYHAPOflHAR OPrAHM3Al b) pig-iron with a manganese content between 6,0 and 30,O %, provided that it cannot be classified as Spiegel iron (see class 5.1); c) pig-iron for which a mini
2、mum content is specified for at least one of the elements not specified in columns 4 to 8; d) pig-iron whose content of at least one of the following elements is within the limits indicated below: Cr 0,3 to 10.0 % MO 0,l Ni 0,3 Ti 0.2 t up to the total content of 10,O % of “other” elements resulting
3、 from table 1. v O,l w O,l 2 Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/27/2007 08:49:59 MDTNo reproduction or networking permitted without license from IHS -,-,- IS0 9147 : 1987 (E
4、) Annex Sampling and preparation of samples intended for the determination of the chemical composition of pig-irons (This annex forms an integral part of the Standard.) A.1 Field of application This annex is applicable to pig-iron in the solid state. NOTE - In the case of pig-iron in the liquid stat
5、e, special regulations are to be agreed between the producer and the purchaser. A.2 Number of pigs to be taken The number of pigs to be taken shall be representative of the batch. In cases of dispute, and if there has been no other agree- ment between the parties, the minimum number of pigs to be ta
6、ken from each batch is given in table 3. Table 3 - Number of pigs to be taken Mass of batch Minimum number of pigs t to be taken 10 20 40 80 160 6300 18 300 600 24 A.3 Selection of samples The samples shall be taken at random, preferably in accordance with one of the procedures described below. A.3.
7、1 Pigs arranged in piles Throw a rope having a certain number of knots onto the pile. Take as samples the pigs touched by these knots. Repeat the operation until a sufficient number of pigs is obtained. A.3.2 Pigs being loaded or unloaded Throughout the loading or unloading operations, take pigs as
8、samples so that the time intervals between taking pigs are approximately equal. , A.4 Preparation of the sample for analysis A.4.1 Chemical analysis A.4.1.1 Machineable pig-iron A.4.1.1.1 Determination of elements other than carbon In the centre of each pig taken from the batch, drill a hole 12 to 1
9、4 mm in diameter. Remove the first chips, which may contain surface scale and other impurities. For the same reason, cease drilling approximately 2 mm from the opposite face of the pig (see figure, point I). Then treat the chips in accordance with A.4.1.3. A.4.1.1.2 Determination of carbon Apply one
10、 of the two procedures A or B below. In cases of dispute, apply procedure A. Procedure A In the centre of each pig taken from the batch, and on each side, drill a hole 12 to 14 mm in diameter (where appropriate, use the hole drilled in accordance with A.4.1 .l .l). Remove the scale and other impurit
11、ies around the holes on both sides of the pig. Then drill another hole coaxial with the first hole, 20 to 24 mm in diameter, in such a way that large chips are obtained and collected in a suitable container see figure, point 2 all. Then treat these chips in accordance with A.4.1.3. Procedure B Using
12、 a gouge or a chisel, remove from the pigs small chips of suitable size (see A.4.1.3) from the lower bulging face in the skin zone, which solidifies rapidly and is in practice free from segregation to a thickness of 5 mm see figure, point 2b)l. Check that the chips are taken from a fractured surface
13、 or, if the pigs have not been broken, that the surface impurities have been previously removed, e.g. by grinding. Then treat these chips in accordance with A.4.1.3. A.4.1.2 Non-machineable pig-iron Break up each pig taken from the batch, for example with a pneumatic hammer, then reduce further unti
14、l pieces of a suitable size for further reduction as in A.4.1.3 are obtained. 3 Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/27/2007 08:49:59 MDTNo reproduction or networking permitte
15、d without license from IHS -,-,- IS0 9147 : 1987 (E) A.4.1.3 Sample for analysis for determination of average composition Reduce the chips or fragments taken according to A.4.1.1 or A.4.1.2, using appropriate equipment, i.e. wear-resistant and, if necessary, dust-tight, to a size appropriate for che
16、mical analysis. The appropriate size is: - for determination of carbon, about 1 to 2 mm, - for determination of other elements, 0,20 mm. Mix equal quantities of the material originating from each of the pigs taken. From this mixture it is possible to obtain a sample for analysis by the usual quarter
17、ing method. A.4.2 Spectrographic analysis If it is intended to make use of spectrographic methods of analysis, the preparation of samples shall be carried out in ac- cordance with methods giving identical results to those used for the chemical analysis. A.5 Methods of analysis A.5.1 Use either chemi
18、cal or spectrographic methods of analysis. A.5.2 Apply the appropriate international Standards for chemical analysis as far as possible. Dimensions in millimetres 1 First hole for taking chips for the determination of elements other than carbon (see A.4.1 .I .I). 2a) Second hole for taking chips for
19、 the determination of the carbon content when using procedure A (see A.4.1 .I .2). 2b) Rapid solidification zone from which fragments are to be taken for the determination of the carbon content when using procedure B in accordance with A.4.1 .I .2. Figure - Taking samples from machineable pig-iron 4
20、 Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/27/2007 08:49:59 MDTNo reproduction or networking permitted without license from IHS -,-,- IS0 9147 : 1997 (E) UDC 559.152.275.12.001.33
21、Descriptors : iron- and steel products, pigs (castings), classification, sampling. Price based on 4 pages Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/27/2007 08:49:59 MDTNo reproduction or networking permitted without license from IHS -,-,-