1、 ENGINEERING MATERIAL SPECIFICATION Material Name Specification Number Date Action Revisions 2002 07 23 Revised Updated and renumbered 2002 01 31 Revised Added A4, renumbered ASTM E 18/ISO 6507) As cast Brinell hardness test location is on the OD at least 25 mm from the skirt end of the casting. Fin
2、ished hardness and location shall be taken as shown on Engineering Drawing or Control Plan. A1 A2 A3/A4 As cast 179-248 HB 212-293 HB 205-273 HB Finished* 179-248 HB 200-285 HB 205-273 HB 85-99 HRB 93 HRB-30 HRC 94-104 HRB 210-300 HV *Average of three readings. 3.4 MICROSTRUCTURE (average over a min
3、imum of 10 adjacent fields at 100X magnification) (ASTM A 247/ASTM E 562) Evaluate microstructure at any position greater than 2 mm from finished outer diameter. The graphite structure at the wear surface of a finished liner at a point approximately 25 mm from the flange end shall consist as defined
4、 in the following. Form VII flake graphite as follows: A1 A2 A3 A4 Type A, % min (size) 50 (4-6) 50 (4-6) Permissible 50 (4-7) Type B, % max (size) 50 (4-6) 50 (4-6) 75 (6-8) Type D&E, max (size) 10 75 (6-8) 25 (4-8) The graphite morphology, size and matrix microstructure content may be measured by
5、estimation, comparison to available industry charts, or by quantitative methods (ASTM E 562 or approved image analysis techniques). In case of dispute, the quantitative metallurgical method will be the umpire method. ENGINEERING MATERIAL SPECIFICATION WSE-M1A320-A1/A4 Page 3 of 3 Copyright 2002, For
6、d Global Technologies, Inc. The matrix microstructure at the wear surface shall consist of fine lamellar pearlite with a maximum of 5 % free ferrite and a maximum of 5 % free carbides. No carbide network is permitted. If present, iron phosphide eutectic (steadite) must be fine, evenly distributed in
7、 a random pattern with no continuous network and shall not exceed 5 % for A1/A2 and 8% for A3/A4. 4. GENERAL INFORMATION The information given below is provided for clarification and assistance in meeting the requirements of this specification. 4.1 REFERENCE DOCUMENTS The following documents are referenced in this specification: ASTM A 247 ASTM E 10 ASTM E18 ASTM E 562 ISO 6506 ISO 6507 QS 9000 WSS-M99P9999-A1
