1、INTERNATIONAL STANDARD IS0 9975 .First edition 1990-12-15 Round non-alloy steel wires for locked coil mine winding ropes - Specifications Fils trCtil - the conditions with which coatings, if any, shall comply: - the conditions of sampling and control. It applies to round, bright or zinc-coated wires
2、 of quality B and of nominal diameters between 1 mm and 3,5 mm. It does not apply to steel wire taken from manufac- tured ropes. 2 Normative references The following standards contain provisions which, through reference in this text, constitute provisions of this International Standard. At the time
3、of publi- cation, the editions indicated were valid. All stan- dards are subject to revision, and parties to agreements based on this International Standard are encouraged to investigate the possibility of ap- plying the most recent editions of the standards in- dicated below. Members of IEC and IS0
4、 maintain registers of currently valid International Standards. IS0 5614:1988, Locked coil wire ropes for mine hoisting - Technical delivery requirements. IS0 6892:1984, Metallic materials - Tensile testing. IS0 7800:1984, Mefallic materials - Wire - Simple torsion test. IS0 7801:1984, Metallic mate
5、rials - Wire - Reverse bend test. IS0 7802:1983, Mefallic materials - Wire - Wrapping test. 3 Wire characteristics 3.1 General conditions of manufacture Wire shall be made by the basic open hearth, elec- tric furnace, or basic oxygen steel process, or by equivalent methods. The finished wires shall
6、not show superficial or internal defects detrimental to their use. When specified, the wires shall be supplied with a zinc coating applied by the hot-dip or the electrolytic process. For the former case, the zinc used shall be 99,9 % pure. 3.2 Diameter 3.2.1 Nominal diameter, d The nominal diameter
7、of the wire, in millimetres, is that by which the wire is designated. It shall be the basis on which the values of all characteristics are determined for acceptance of the wire. 3.2.2 Actual diameter The actual diameter of the wire is the arithmetic mean of two measurements carried out in accord- an
8、ce with 5.1. It shall be within the limits of tolerance specified in table 1. 3.2.3 Ovality of the wire The arithmetic difference between the two measurements of the diameter shall be not more than half the tolerance specified in table 1. Copyright International Organization for Standardization Prov
9、ided by IHS under license with ISONot for ResaleNo reproduction or networking permitted without license from IHS-,-,-IS0 9975:1990(E) Table 1 - Tolerances on diameter Values in millimetres Table 2 - Tolerances on tensile grade I Nominal diameter of wire Tolerance on diameter d Bright and zinc-coated
10、 wires quality B 1 lina . - Samp!es for Delivery unit Production coil Bobbins and spools mechanical tests inspection tests for galvanized coating At one end of each bobbin or spool At one end of every three bobbins or spools 5 Tests 5.1 Measurement of diameter The diameter shall be determined from t
11、wo measurements in two perpendicular directions in the same section and on the same diametrical plane, using a micrometer accurate to 0,Ol mm. 5.2 Tensile test The tensile test shall be carried out in accordance with IS0 6892. The rate of stressing may be greater than that specified in IS0 6692, in
12、view of the num- ber of tests on wire involved in the inspection of the batch. However, it shall not exceed a rate producing an elongation of 25 % of the distance between grips within 1 min. The length of the test piece shall pref- erably be such that the distance between the grips of the testing ma
13、chine is 100 mm. In case of dispute, the tensile test shall be per- formed strictly in accordance with IS0 6892, par- ticularly with regard to the rate of stressing. 5.3 Reverse bend test The test shall be carried out in accordance with IS0 7801, with the radius of curvature of supports specified in
14、 table 3. 5.4 Simple torsion test The test shall be carried out in accordance with IS0 7800, with the number of torsions specified in table 4. A length of 100d for the test piece between grips is preferred. If this length cannot be adopted, an alternative length shall be chosen at the wire manufactu
15、rers discretion. In this case, the minimum number of torsions which the wire shall withstand shall be proportional to the number specified in ta- ble4, for a test length of IOOd. Copyright International Organization for Standardization Provided by IHS under license with ISONot for ResaleNo reproduct
16、ion or networking permitted without license from IHS-,-,-IS0 9975:1990(E) 5.5 Inspection of zinc coating The determination of mass of zinc shall be carried out in accordance with annex A. An adhesion test shall be carried out in accordance with annex B. 6 Certificate According to the purchasers orde
17、r, one of the fol- lowing control documents may be established. 6.1 Certificate of conformity By this certificate, the manufacturer acknowledges that the conditions as specified in the purchasers order are fulfilled. 6.2 Full works certificate This certificate shall give the results of tests carried
18、 out by the manufacturer in accordance with this International Standard. 6.3 Certificate of acceptance In particular cases, when requested by the pur- chaser, tests may be undertaken after manufacture in the presence of the purchaser or his represen- tative. The test results shall be provided in the
19、 cer- tificate of acceptance, which is equivalent to a full works certificate. 7 Marking Each delivery unit shall be marked and identified by a durable label securely fixed to each coil or bobbin clearly indicating at least the following: 4 b) cl d) 8 the name of the manufacturer or supplier; the in
20、dications relative to the wire (diameter, surface condition, tensile grade. and mass or length per delivery unit); - the number of the customers order; the number of the bobbin or coil. Information to be supplied by the purchaser The purchaser shall indicate with the order: a) reference to this Inte
21、rnational Standard; b) the nominal diameter of the wire; c) the surface finish (bright, zinc-coated quality B); d) the tensile grade of wire; e) the type of certificate to be supplied by the manufacturer; f) the mass or length of the delivery unit 5 Copyright International Organization for Standardi
22、zation Provided by IHS under license with ISONot for ResaleNo reproduction or networking permitted without license from IHS-,-,-IS0 9975:1990(E) Annex A (normative) Determination of mass of zinc deposited per unit surface area A.1 General Two methods are recognized: the gravimetric method described
23、in IS0 1460 and the gas volu- metric method described below. The gas volumetric method is the easiest to carry out. In case of dispute, however, the gravimetric method shall be used. A.2 Gas volumetric method A.2.1 Principle The zinc coating of a test specimen of wire of given dimensions is dissolve
24、d in a hydrochloric acid sol- ution. The mass of zinc so dissolved is determined by measuring the volume of hydrogen released during dissolution of the coating (gas volumetric method). By relating the mass of zinc determined in this way to the surface area of the test specimen measured after dissolv
25、ing the coating, the mass of zinc deposited per unit surface area is obtained. A.2.2 Reagents A.2.2.1 Hydrochloric acid, solution of suitable con- centration. A.2.2.2 Inhibitor, for example hexamethylene tetramine (C,H,N4), antimony(lll) chloride (SbCI,) or antimony oxide (Sb,O,). A.2.3 Apparatus Th
26、e apparatus used consists of the following el- ements (see figure A.l). A.2.3.1 Tube, graduated in millilitres at least, with a tap at each end. A.2.3.2 Flask, with a nozzle near the bottom con- nected by a rubber tube to a nozzle near the bottom of the graduated tube as shown in figureA.l. A.2.3.3
27、Beaker, for holding the test specimen after removal of the zinc coating. Figure A.1 A.2.4 Preparation of test specimens After carefully straightening the samples of wire, test specimens shall be cut to a length of 150 mm for wires 1 mm to I,49 mm in diameter; 100 mm for wires I,5 mm to 3 mm in diame
28、ter; 50 mm for wires of more than 3 mm in diameter. NOTE 2 Test specimens more than 100 mm long may be cut into several pieces of approximately equal length prior to insertion into the graduated tube. A.2.5 Procedure With tap b closed, the graduated tube and part of the flask are filled with hydroch
29、loric acid solution (A.2.2.1) containing a suitable inhibitor (A.2.2.2). The level of the liquid in the graduated tube (A.2.3.1) is raised to just under tap a by raising the acid reservoir flask (A.2.3.2). The level in the tube and flask should be the same. After introducing the test specimen into t
30、he gradu- ated tube, tap a is closed and the hydrogen released by the action of the acid on the zinc coating is al- lowed to accumulate in the upper part of the gradu- ated tube. Copyright International Organization for Standardization Provided by IHS under license with ISONot for ResaleNo reproduct
31、ion or networking permitted without license from IHS-,-,-IS0 9975:1990(E) When hydrogen is no longer released, the flask is lowered in relation to the graduated tube so as to bring the levels of the solution in the tube and in the flask into the same plane. The position of the meniscus of the liquid
32、 in the tube then indicates the volume of hydrogen released. The remaining part of the solution contained in the graduated tube is collected in the flask by placing the flask on a table and opening tap a. Tap b is then opened so.that the test specimen can be extracted into the beaker (A.2.3.3). The
33、test specimen is washed and carefully wiped before measuring its length and diameter. The test is carried out on one test specimen at a time, the temperature in the tube being held at 20 “C It 2 T. The number of test specimens tested shall be the subject of agreement between the interested par- ties
34、. A.2.6 Expression of results The mass, m, in grams per square metre, of zinc deposited per unit surface area is given by the equation 27201 172 = _ ndl where d is the diameter, in millimetres, of the un- coated wire: I is the length, in millimetres, of the test specimen of wire; v is the mean volum
35、e, in millilitres, of hy- drogen released during each test. Where the barometric pressure is known to be out- side the range 740 mmHg to 780 mmHgl), the right- hand side of the equation should be multiplied by the factor p/760 where p is the pressure, in conven- tional millimetres of mercury. In pra
36、ctice, tables allow the mass of zinc per square metre of the surface of the uncoated wire to be read directly as a function of the diameter of the wire and the volume of hydrogen released. 1) 1 mmHg = 133,322 Pa 7 Copyright International Organization for Standardization Provided by IHS under license
37、 with ISONot for ResaleNo reproduction or networking permitted without license from IHS-,-,-IS0 9975:1990(E) Annex B (normative) B.l Test method Test for adhesion of zinc coating The test shall be carried out in accordance with IS0 7802 with the following requirements. The test specimen shall be wou
38、nd round a cylindri- cal mandrel to form ten close turns. The ratio of mandrel diameter to wire diameter is specified in table B.I. Winding shall be carried out at a uniform rate not exceeding 60 r/min. Table B.l - Ratio of mandrel diameter to nominal wire diameter Ratio of mandrel diameter to wire
39、diameter 2 3 8.2 Expression of results After winding on a mandrel of appropriate diameter, the outside surface of the spirals shall show no sign of peeling or of serious cracks in the zinc coating. The zinc coating may therefore be considered sat- isfactory if any small cracks, which may have been d
40、etected after examination with the naked eye, are such that it is not possible to detach the zinc coating by simply rubbing with the fingers, without using the finger-nail. Loosening or detachment of superficial small par- ticles of zinc during the adherence test is not con- sidered to be lack of ad
41、herence. 8 Copyright International Organization for Standardization Provided by IHS under license with ISONot for ResaleNo reproduction or networking permitted without license from IHS-,-,-IS0 9975:1990(E) . Annex C (informative) Bibliography l IS0 1460:1973, Met.$lic coatings - Hot dip galvanized c
42、oatings on ferrous materials - Determination of the mass per unit area - Gravimetric mefhod. Copyright International Organization for Standardization Provided by IHS under license with ISONot for ResaleNo reproduction or networking permitted without license from IHS-,-,-IS0 9975:1990(E) - UDC 669.14
43、-426.2:677.721:622.673.6 Descriptors: mining equipment, steel products, wire rope, wire, specifications, dimensions, tests, marking. acceptance certificates. Price based on 9 pages Copyright International Organization for Standardization Provided by IHS under license with ISONot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
