1、DOD-STD-ZLB3 32 99799lJ2 OU15830 o 5 March 1985 SUPERSEDING MIL-B-22852 (SHIPS) 17 Mairck 1961 MILITARY STANDARD BOND TESTING, BABBITT-LINED BEARINGS FSC 3120 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-DOD-STD-2383 31 W 9717733 0035833 2 I DEPAR
2、TMENT OF TE NAVY NAVAL EA SYSTEMS COMMAND Washington, BC 20362-5101 Bond Testing, Babbitt-Lined Bearings. 1. Command, Department of the Navy, and is available for use by a11 Departments and Agencies of the Department of Defense. This Military Standard is approved for use by the Naval Sea Systems 2.
3、Beneficial comments (recommendations, additions, deletions) md any partinent data which may be OP use in improving this document should be addressed to: Commander, Naval ea Systems Command, SEA 55913, Department of the Navy, Washington, DC 20362-5101 by using the self-addressed Stdadiatfn Document I
4、mprovement Proposal (BB Form 1426) appearing at the end of this document or by letter. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-DOD-STD-2183(SH) 5 March 1985 FOREWORD 1. This standard is intended to be used to provide requirements for bond tes
5、ting and to define the quality of bond required for steel and bronze backed babbitt-lined bearings frequently used in shipboard machinery, such as turbines, gears, pumps, fans, lineshaft, journal and thrust bearings. iii Provided by IHSNot for ResaleNo reproduction or networking permitted without li
6、cense from IHS-,-,-DOD-STD-2LB3 31 W 3L1 O015833 b W Paragraph 1. 1.1 2. 2.1 2.2 3. 4. 4.1 4.2 4.3 4.4 4.4.1 4.5 4.5.1 4.6 5. 5.1 5.2 5.3 5.3.1 5.3.2 5.4 5.4.1 5.4.1.1 5.4.1.1.1 5.4.1.1.2 5.4.1.2 5.4.1.3 5.4.1.3.1 5.4.1.3.2 5.4.1.3.3 5.4.1.3.4 5.4.2 5.4.2.1 5.4.2.2 5.4.2.3 5.4.2.4 5.4.3 5.4.3.1 5.5
7、DOD-STD-2183(SH) 5 March 1985 CONTENTS Page 2 2 3 3 3 4 4 4 4 4 5 5 5 6 6 6 6 6 6 6 7 7 7 7 8 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Figure 1. 2. 3. 4. 5. Table I. Paragraph 10. 10.1 DOD-STD-2183 33 M 7777733 0035834 8 = DOD-STD-2183(SH) 5 M
8、arch 1985 CONTENTS - Continued FIGURES Page TABLE APPENDIX v/vi Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-DOD-STD-2383 31 W 7777713 0035835 T m. DOD-STD-2183(SH) 5 March 1985 1. SCOPE 1.1 Scope. This standard provides the requirements for destr
9、uctive and nondestructive metallurgical bond testing of babbitt-lined bearings. 2, REFERENCED DOCUMENTS 2.1 Issues of documents. The following documents of the issue in effect on date of invitation for bids or request for proposal, form a part of this standard to the extent specified herein. SPECIFI
10、CATIONS FEDERAL QQ-T- 3 9 O - STANDARDS MILITARY MIL-STD-105 - MIL-STD-271 - MIL-STD-45662 - (Copies of specifications tion with specific acquisition activity or as directed by the Tin Alloy Ingots and Castings and Lead Alloy Ingots and Castings (Antifriction Metal) for Bearing Applications. Samplin
11、g Procedures and Tables for Inspection by Nondestructive Testing Requirements for Metals. Calibration Systems Requirements. Attributes. and standards required by contractors in connec- functions should be obtained from the contracting contracting officer.) 2.2 Other publications. standard to the ext
12、ent specified herein. Unless otherwise indicated, the The following document forms a part of this issue in effect on date of invitation forbidc or request for proposal shall apply 8 AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM) B 23 - White Metal Bearing Alloys. (Application for copies should be
13、 addressed to the American Society for Testing and Materials, 1916 Race Street, Philadelphia, PA 19103.) (Technical society and technical association specifications and standards are generally available for reference from libraries. buted among technical groups and using Federal agencies.) They are
14、also distri- 3. DEFINITIONS Not applicable. 1 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-DOD-STD-2183 31 7777711 001583b 1 W DOD-STD-2183(SH) 5 March 1985 4. GENERAL REQUIREMENTS 4.1 Material. The antifriction material to which the bond testing
15、specified herein applies shall be grade 2 or 3 babbitt meeting the requirements of QQ-T-390 or ASTM B 23. the same as the production or repair bearings (i.e., steel or brass/bronze) required to meet this standard. The babbitt and shell or backing material shall be 4.2 Design. The bearing design shal
16、l be either journal or thrust and shall have a plain cylindrical, tilting pad, flat washer or tapered land configuration. 4.3 Bond extent. The extent of the bonded area determined ultrasonically as specified in 5.4.1 shall be as specified therein. 4D4 Bond strength, The minimum mean bond strength, w
17、hen measured as specified in 5.4.2, shall be as specified therein for the respective material. 4.4.1 Bond strength determination. The results of the ultrasonic inspec- tion shall be used to select areas for bond strength determination. test samples shall be taken in areas shown as unbonded or of que
18、stionable bond. Chalmers 4.5 Bond ductility. Bond ductility shall be evaluated both from inspec- tion of the Chalmers test samples after completion of that test as specified in 5.4.2 and by means of a chisel test as Specified in 5.4.3 (a brittle bond will part at the babbitt-backing material interfa
19、ce while a ductile bond will part in the babbitt some distance from the interface). 4.5.1 Evaluation of bond ductility. Some evidence of a brittle bond from the inspection of a Chalmers test specimen is permissible within the limits specified in 5.4.2. evaluated by the chisel test as specified in 5.
20、4.3. The bond shall be ductile over the entire bond area when 4.6 Quality assurance provisions. The contractor is responsible for the performance of all inspection requirements as specified herein. otherwise specified, the contractor may utilize his own or any other inspection facilities and service
21、s acceptable to the Government. examination and tests shall be kept complete and available to the Government as specified in the contract or order. The Government reserves the right to perform any of the inspections set forth in this standard where such inspections are deemed necessary to assure sup
22、plies and services conform to prescribed requirements, Except as Inspection records of the 5, DETAILED REQUIREMENTS 5,l Test equipment and inspection facilities. Test and measuring equip- ment and inspection facilities of sufficient accuracy, quality, and quantity to permit performance of the requir
23、ed inspection shall be established and main- tbined by the babbitting activity. calibration system to control the accuracy of the measuring and test equipment shell be in accordance with MIL-STD-45662. The establishment and maintenance of a 2 Provided by IHSNot for ResaleNo reproduction or networkin
24、g permitted without license from IHS-,-,-DOD-STD-2183 31 W 7777721 0035837 3 DOD-STD-2 183 (SH) 5 March 1985 5.2 Material inspections. Material composition inspections shall consist of certification (see appendix) supported by verifying data that the materials used in fabricating the babbitt-lined b
25、earings are in accordance with the applicable referenced specifications prior to such fabrication-. 5.3 Sampling for tests. Sampling for tests shall be in accordance with Backing material of sample bearing MIL-STD-105, except as modiied in 5.3,l. shall have the same composition, wall thickness and r
26、adius of curvature as the shells of the bearings being supplied. shall be cleaned and prepared for babbitting together with the shells of bearings to be supplied and by exactly the same method. heat shall be used for both the sample bearing and the bearings to be supplied. The babbitt thickness cast
27、 in the sample bearing shall be at least as great as that cast in the bearings to be supplied and ailow the minimum babbitt thickness after finishing the surface to be not less than 4 millimeters (mm) (0.150 inch). The sample bearings shall have the same length as the bearings being supplied for jou
28、rnal bearings up to 100 mm (4 inches) in diameter. .For larger journal bearings, the length of the sample bearing shall be limited to 100 mm (4 inches) or 20 percent a&e bearing inside diameter whichever is larger. samples shall consist of flat plates whose inside and outside diameters are equal to
29、those of the tapered land bearings or plain thrust washers being supplied. For tilting pad thrust bearings, sample bearings shall have the same babbitt surface dimensions as a single thrust shoe f the bearings being supplied. Backing material of sample bearing Babbitt from the same Journal bearing s
30、amples shall consist of two half shells. Thrust bearing 5.3.1 Sample bearings. Lots of new journal bearings and new thrust bearings shall be sampled in accordance with table I. Samples from the first lot of new bearings shipped from a specific manufacturer in each calendar year shall be tested by th
31、e test methods of 5.4.1, 5.4.2, and 5.4.3. Records of these tests shall be maintained by the manufacturer to serve as a reference for inspection of subsequent shipments. Subsequent shipments in the same calendar year may be tested by nondes-tructive testing (NDT) only by the method of 5.4.1. have th
32、e ultrasonic test (see 5.4.1) conducted on a bearing to be supplied, and the destructive tests (see 5.4.2 and 5.4.3) conducted on a separately cast sample. The separately cast sample does not need to be finish machined, but the babbitt thickness shall be sufficient to allow for a finished thickness
33、of not less than 4 mm (0.150 inches). Alternatively for such large journal bearings, the destructive tests may be conducted on a sample which is cast and machined as an integral part of a bearing to be supplied and then cut from one end to achieve the correct length in the bearing to be supplied. Th
34、e babbitt in the sample shall be sufficiently great to allow a finished thickness of at least 4 mm (0.150 inches) and the sample shall be long enough to provide the area required for the eight specimen locations specified in 5.4.2 and the four edge cuts specified in 5.4.3. New journal bearings large
35、r than 200 mm (8 inches) in diameter may 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-DOD-STD-2183 31 7777711 0015838 5 Number of bearings in lot DOD-STD-2183(SH) 5 March 1985 Number of samples required 1-49 50-99 100-299 300-399 400 and over 5.
36、3.2 Rebabbitted bearings. Rebabbitted bearings shipped by a babbitting activity which has conducted the necessary tests in accordance with 5.4.1, 5.4.2, and 5.4.3, on a shipment or lot of new bearings in that calendar.year and has a record of the test data may test the rebabbitted bearings in accord
37、ance with the method of 5.4.1 only. obtained on a sample cast together with the rebabbitted bearing. If destructive test data is not on file, it shall be 5.4 Tests. The tests for bond are as follows: (a) Ultrasonic test (see 5.4.1) for bond extent measurement. (b) Chalmers test (see 5.4.2) for bond
38、strength measurement and (c) Chisel test (see 5.4.3) for bond ductility evaluation. bond ductility evaluation. These tests shall be performed in the order given. made over the entire babbitt surface and the acceptance criteria of 5.4.1.3 shall be applied. The chalmers bond tests of 5.4.2 shall be ap
39、plied at eight locations on the sample bearing. The eight locations shall be selected after a review of the findings of 5.4.1. be applied. Chisel tests (see 5.4.3) shall be applied at four locations selected to avoid the holes made by the chalmers bond tests. criteria of 5.4.3.1 shall be applied to
40、the results of the chisel tests. The test of 5.4.1 shall be The acceptance criteria of 5.4.2.4 shall The acceptance 5.4.1 Ultrasonic bond extent measurement. The extent of the bond between the babbitt and the backing metal of the sample bearings shall be determined by the use of ultrasonic methods.
41、Personnel and procedure qualifications shall be in accordance with MIL-STD-271. procedure and test report shall be prepared (see appendix). A detailed written ultrasonic inspection 5.4.1.1 Equipment. A pulse-echo “A“ scan instrument shall be used. The transducer shall be a single or dual element and
42、 produce a compression wave of 4 to 10 megahertz. without loss of contact. curvature which matches that of the bearing being inspected to maintain adequate contact. water, or 8 synthetic couplant with suitable coupling properties. The transducer shall have a diameter to suit the bearing The transduc
43、er may be equipped with delays having a A couplant shall be used and may be either oil, glycerine, 5.4.1.1.1 Demonstration of instrument suitability. Suitability of the equipment shall be demonstrated by the use of a reference block, such as the ones shown on figure 1. shown on figure 1, but the bab
44、bitt and backing material thicknesses may be other than as shown in order to more closely represent the babbitt and shell thicknesses of the sample bearing to be tested, or the block may incorporate The unbonded areas in the reference block shall be as 4 Provided by IHSNot for ResaleNo reproduction
45、or networking permitted without license from IHS-,-,-DOD-STD-2383 33 = 9777733 0035837 7 m DOD-STD-2183(SH) 5 March 1985 stepped regions with different babbitt thicknesses. reference block is made by painting the area of the backing material with colloidal graphite in water followed by baking at 12O
46、oC (250F) before babbitting. Each unbonded area of the 5.4.1.1.2 Calibration standard for unbond. The standard used to calibrate the ultrasonic instrument for detection of unbonded areas shall be a strip of clean babbitt without backing material. same thickness as the babbitt in the sample bearing t
47、o be inspected, within plus or minus 20 percent or plus or minus 1.5 mm (1/16 inch), whichever is smaller. shall be flat. For jouynal bearing inspection, the strip of babbitt shall have a curvature with a radius-equal to the radius of curvature of the bearing to be inspected within plus or minus 10
48、percent and the transducer shall be equipped with the delay used for the bearing inspection. The strip of babbitt shall have the For thrust bearing or thrust shoe inspections, the strip of babbitt 5.4.1.2 Bond examination. Prior to each sample bearing inspection, the suitability of the equipment (se
49、e 5.4-1.1) shall be demonstrated with a reference block (see 5.4.1.1.1) by mapping the bonded and unbonded areas of the block by using the patterns of pulse reflection. on figures 2 and 3. verifying that the detected areas of bond and unbond match the known such areas in the block, the same equipment shall be used to test the sample bearing. The calibration standard (see 5.4.1.1.2) that is w
