SAE J 441-2009 Cut Wire Shot《钢丝切丸》.pdf

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4、0 (outside USA) Fax: 724-776-0790 Email: CustomerServicesae.org SAE WEB ADDRESS: http:/www.sae.org SAE values your input. To provide feedback on this Technical Report, please visit http:/www.sae.org/technical/standards/J441_201310 SURFACE VEHICLE RECOMMENDED PRACTICE J441 OCT2013 Issued 1952-01 Reaf

5、firmed 2013-10 Superseding J441 NOV2009 Cut Wire Shot RATIONALE J441 has been reaffirmed to comply with the SAE five year review policy. 1. SCOPE This SAE Recommended Practice is considered to be tentative and is subject to modification to meet new developments or requirements. It is offered as a gu

6、ide in the selection and use of cut wire shot. 2. REFERENCES 2.1 Applicable Publications The following publications form a part of this specification to the extent specified herein. 2.1.1 ASTM Publications Available from ASTM International, 100 Barr Harbor Drive, P.O. Box C700, West Conshohocken, PA

7、 19428-2959, Tel: 610-832-9585, www.astm.org. ASTM A 370 Test Methods and Definitions for Mechanical Testing of Steel Products ASTM E 384 Test Method for Microhardness of Materials 3. DESCRIPTION Cut wire shot shall be the product of carbon steel wire or stainless wire Type 302, 304, Condition B, Sp

8、ring Temper, cut into the form of cylinders with lengths approximately equal to the wire diameter. Conditioned cut wire shot with edges prerounded shall be required for shot peening applications. 4. CLASSIFICATION All cut wire shot shall be identified according to the wire size from which it is obta

9、ined. It shall be identified by the prefix letters CW meaning cut steel wire or SCW meaning stainless cut wire. This designation shall be followed by a two-digit suffix number equivalent to the mean diameter, in inches, of the wire from which the shot is produced times 1000 Table 1. 5. CHEMICAL COMP

10、OSITION The chemical composition shall conform to the following specifications: 5.1 Carbon Steel Carbon: 0.45 to 0.85 Manganese: 0.30 to 1.30 Phosphorus: 0.040 max Sulphur: 0.050 max Silicon: 0.15 to 0.35 TABLE 1 - WIRE DIAMETER USED FOR CUT WIRE SHOT Shot Size Mean Wire Diameter (mm) Mean Wire Diam

11、eter (in) SCW/CW-125 3.2 0.125 SCW/CW-116 3.0 0.116 SCW/CW-96 2.4 0.096 SCW/CW-80 2.0 0.080 SCW/CW-62 1.6 0.062 SCW/CW-54 1.4 0.054 SCW/CW-47 1.2 0.047 SCW/CW-41 1.0 0.041 SCW/CW-35 0.9 0.035 SCW/CW-32 0.8 0.032 SCW/CW-28 0.7 0.028 SCW/CW-23 0.6 0.023 SCW/CW-20 0.5 0.020 SCW/CW-17 0.45 0.017 SCW/CW-

12、14 0.35 0.014 SCW/CW-12 0.30 0.012 5.2 Stainless Steel Carbon: 0.15 max Manganese: 2.00 max Phosphorus: 0.045 max Sulphur: 0.030 max Silicon: 1.00 max Chromium: 17.00 to 20.00 Nickel: 8.00 to 10.50 6. HARDNESS Carbon steel cut wire particles shall have a minimum hardness of 42 HRC (KHN 426 or HV 412

13、). Stainless cut wire shot shall have a minimum hardness of 45 HRC (466 KHN or HV 445). The hardness shall be determined per ASTM E 384 and using a 500 gf load for sizes CW-28 and finer or a 1000 gf load for sizes larger than CW-28. Other microhardness test methods may be used as long as a reliable

14、hardness conversion can be obtained by calibrating various machines against known standards. Approximate conversions to Rockwell C Hardness Numbers (HRC) from Knoop Hardness Numbers (KHN) and Vickers Hardness Numbers (HV) are obtained from ASTM A 370. Other hardness values can be specified by the pu

15、rchaser. SAE INTERNATIONAL J441 Reaffirmed OCT2013 Page 2 of 4_ 7. SIZE CLASSIFICATION Cut wire shot shall be made from wire of the diameters shown in Table 1. The weight of random as-cut particles shall be within the limits of Table 2. The weight of random conditioned particles shall be within the

16、limits of Table 3. Shot sizes varying from those shown are available and may be obtained by arrangement between shot manufacturer and purchaser. TABLE 2 - WEIGHT LIMITS FOR AS-CUT PARTICLES Shot Size (mm) Shot Size (in) Weight of 50 Random Pieces (grams) 3.2 SCW/CW-125 8.870 10.830 3.0 SCW/CW-116 7.

17、080 8.660 2.4 SCW/CW-96 4.000 4.900 2.0 SCW/CW-80 2.340 2.860 1.6 SCW/CW-62 1.090 1.330 1.4 SCW/CW-54 0.720 0.880 1.2 SCW/CW-47 0.480 0.580 1.0 SCW/CW-41 0.310 0.390 0.9 SCW/CW-35 0.200 0.240 0.8 SCW/CW-32 0.140 0.180 0.7 SCW/CW-28 0.100 0.120 0.6 SCW/CW-23 0.050 0.070 0.5 SCW/CW-20 0.040 0.050 Weig

18、ht of 100 Random Pieces (grams) 0.45 SCW/CW-17 0.040 0.060 0.35 SCW/CW-14 0.020 0.040 0.30 SCW/CW-12 0.010 0.025 SAE INTERNATIONAL J441 Reaffirmed OCT2013 Page 3 of 4_ TABLE 3 - WEIGHT LIMITS FOR CONDITIONED CUT WIRE SHOT Shot Size (mm) Shot Size (in) Weight of 50 Random Pieces (grams) 3.2 SCW/CW-12

19、5 8.400 10.300 3.0 SCW/CW-116 6.750 8.250 2.4 SCW/CW-96 3.800 4.700 2.0 SCW/CW-80 2.200 2.700 1.6 SCW/CW-62 1.040 1.260 1.4 SCW/CW-54 0.680 0.840 1.2 SCW/CW-47 0.460 0.550 1.0 SCW/CW-41 0.290 0.370 0.9 SCW/CW-35 0.190 0.230 0.8 SCW/CW-32 0.130 0.170 0.7 SCW/CW-28 0.095 0.115 0.6 SCW/CW-23 0.045 0.06

20、5 0.5 SCW/CW-20 0.040 0.050 Weight of 100 Random Pieces (grams) 0.45 SCW/CW-17 0.035 0.055 0.35 SCW/CW-14 0.020 0.040 0.30 SCW/CW-12 0.010 0.025 8. INSPECTION PROCEDURE Shot particles to be checked for hardness are to be mounted, ground, and polished to the centerline. 9. SOUNDNESS As-cut shot parti

21、cles shall be free of shear cracks and laps and shall not contain excessive seams or burns. Conditioned particles shall be free of shear cracks and shall not contain excessive seams. 10. PACKAGING This material shall be packaged to prevent loss during shipping and storage. 11. NOTES 11.1 Marginal In

22、dicia A change bar (I) located in the left margin is for the convenience of the user in locating areas where technical revisions, not editorial changes, have been made to the previous issue of this document. An (R) symbol to the left of the document title indicates a complete revision of the documen

23、t, including technical revisions. Change bars and (R) are not used in original publications, nor in documents that contain editorial changes only. PREPARED BY THE SAE SURFACE ENHANCEMENT COMMITTEE OF THE SAE FATIGUE, DESIGN, AND EVALUATION DIVISION SAE INTERNATIONAL J441 Reaffirmed OCT2013 Page 4 of 4_