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 1991 07 23 NE01E10127076020 Released C. Webster Controlled document at www.MATS Copyright 2012, Ford Global Tech
2、nologies, Inc. Page 1 of 2 SINTERED IRON-CARBON-COPPER-TIN-PHOSPHORUS-STEEL WSE-M10A94-A1 NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is a sintered iron-carbon-copper-tin-phosphorus steel. 2. APPLICATION This specification was released originally for valve guide
3、s 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 A
4、 484) Total carbon 1.50 - 2.50 Combined carbon 0.70 - 2.00 Manganese 0.03 - 0.49 Sulfur 0.02 - 0.11 Copper 2.00 - 6.00 Tin 0.10 - 1.00 Phosphorus 0.10 - 1.00 Magnesium 0.02 - 0.20 Silicon 0.05 - 0.30 Others 1.0 max Iron Balance 3.3 DENSITY, g/cm3 6.3 min (average) (ISO 2738/ASTM B 328) 6.4 min (top
5、third) 6.1 min (middle third) 6.4 min (bottom third) 3.4 APPARENT HARDNESS 65 - 90 HRB (ASTM E 18/ISO 4498) Average of a minimum of five readings along a longitudinal section of the wall on the outside surface a minimum of 5 mm from either end. All individual hardness readings shall conform to the h
6、ardness range. ENGINEERING MATERIAL SPECIFICATION WSE-M10A94-A1 Copyright 2012, Ford Global Technologies, Inc. Page 2 of 2 3.5 MICROSTRUCTURE (ASTM E 3/ASTM E 562) The microstructure shall consist of a mixture of pearlite, ferrite, iron-phosphorus-carbon eutectic and solid lubricant. When observed i
7、n a radial cross section the iron-phosphorus-carbon eutectic shall not be less than 5%. 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.
