1、 ENGINEERING MATERIAL SPECIFICATION Date Action Revisions Rev 02 2012 03 06 N Status No replacement or usage G. Weber, NA 2003 10 16 Revised Para 3.0 inserted; para 3.1, 3.7 and 4 deleted 1989 09 12 NE01E10000474054 Released J. C. Webster NAAO, N. Riley EAO Controlled document at www.MATS Copyright
2、2012, Ford Global Technologies, Inc. Page 1 of 2 SINTERED IRON-CARBON COPPER STEEL WSE-M10A90-A NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is a sintered and coined iron carbon copper steel. 2. APPLICATION This specification was released originally for valve gui
3、des for internal combustion engines. 3. REQUIREMENTS 3.0 STANDARD REQUIREMENTS FOR PRODUCTION MATERIALS Material suppliers and part producers must conform to the Companys Standard Requirements For Production Materials (WSS-M99P1111-A). 3.2 CHEMICAL COMPOSITION (weight %) (ASTM A 751/ASTM E 1019/ASTM
4、 A 484) Total Carbon 0.60 - 1.00 Combined Carbon 0.50 - 0.80 Manganese 0.50 - 1.00 Copper 3.50 - 5.50 Magnesium 0.20 - 0.60 Sulfur 0.15 - 0.35 Phosphorus 0.05 max Other 4.0 max Iron Balance 3.3 DENSITY, g/cm3 6.5 min (ISO 2738/ASTM B 328) (average overall) 3.4 HARDNESS 3.4.1 Apparent Hardness 70 - 8
5、5 HRB (ASTM E 18/ISO 4478) (Average of minimum of ten readings made along a longitudinal section of the wall a minimum of 5 mm from either end - five evenly spaced measurements taken on the inside surface and five evenly spaced measurements taken on the outside surface). 3.4.2 Microhardness 260 - 46
6、0 Knoop (ASTM E 384) (50 g load, average of minimum of five readings taken on a traverse perpendicular to the longitudinal axis of the guide extending from the inside wall surface to a minimum of 0.50 mm) ENGINEERING MATERIAL SPECIFICATION WSE-M10A90-A Copyright 2012, Ford Global Technologies, Inc.
7、Page 2 of 2 3.5 MICROSTRUCTURE (ASTM E 3/ASTM E 562) The microstructure shall be a mixture of pearlite, ferrite, alloyed copper, free carbon, manganese sulphide particles and inorganic solid lubricant. Free ferrite shall not exceed 10% of the area of any radial cross section. The area fraction of in
8、organic solid lubricant shall constitute 7% to 11% of any radial cross section. Internal voids shall not exceed 0.38 mm in any dimension when cross sections are examined in the unetched condition. 3.6 SURFACE CONDITION Surfaces shall be free of scale and rust. Nicks, cracks, burrs and depressions shall not exceed 0.25 mm in any direction. Visual inspection is to be performed under white light without the aid of magnification.
