1、 ENGINEERING MATERIAL SPECIFICATION Date Action Revisions Rev 03 2012 03 06 N Status No replacement or usage G. Weber, NA 2003 10 14 Revised Para 3.0 inserted; para 3.1, 3.7 and 4 deleted; inactive WSE-M10A76-A2 was removed 1985 09 25 CE3PRD863100E175 Released J. C. Webster Controlled document at ww
2、w.MATS Copyright 2012, Ford Global Technologies, Inc. Page 1 of 2 SINTERED IRON, TUNGSTEN, MOLYBDENUM, WSE-M10A76-A VANADIUM, CHROMIUM NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is sintered high speed steel with copper infiltration. 2. APPLICATION This specific
3、ation was released originally for material used for exhaust valve seat inserts. Applications also may include intake and exhaust valve seats for diesel and internal combustion engines. 3. REQUIREMENTS 3.0 STANDARD REQUIREMENTS FOR PRODUCTION MATERIALS Material suppliers and part producers must confo
4、rm to the Companys Standard Requirements For Production Materials (WSS-M99P1111-A). 3.2 CHEMICAL COMPOSITION (Weight %) (ASTM A 751/ASTM E 1019) Total Carbon 0.8 - 1.4 Combined Carbon 0.8 - 1.2 Tungsten 4.0 - 6.0 Molybdenum 4.0 - 6.0 Vanadium 2.0 - 3.0 Chromium 2.5 - 4.0 Copper 15.0 - 25.0 Sulphur -
5、 Others 2.0 max Iron 52.0 min 3.3 DENSITY, min 7.5 - 8.3 g/cm3 (ISO 2738/ASTM B 328) 3.4 APPARENT HARDNESS HRA 68 - 78 (ASTM E 18) See engineering drawing for hardness test location. ENGINEERING MATERIAL SPECIFICATION WSE-M10A76-A Copyright 2012, Ford Global Technologies, Inc. Page 2 of 2 3.5 MICROS
6、TRUCTURE The part microstructure shall consist of a martensitic matrix with evenly distributed intra-granular spheroidal alloy carbides. No inter-granular oxide film is not permitted. The available porosity shall be filled with copper. 3.6 SURFACE CONDITION Sintering marks on the back face shall not
7、 exceed an area of 3 mm2. 5. GENERAL INFORMATION The information given below is provided for clarification and assistance in meeting the requirements of this specification. 5.1 RADIAL CRUSHING STRENGTH As per Engineering Drawing Typical 1000 MPa All engineering drawings which do not specify a radial
8、 crushing strength carry the mandatory requirement of a radial crushing strength as calculated by using the formula: Radial Crushing Strength, N KLT2 D-T Where: L - Bearing length, mm T - Wall thickness, mm D - Outside diameter, mm K - Factor: 25.8 - 28.6 MPa Test Method: Radial crushing strength sh
9、all be determined by compressing the sample between two parallel flat surfaces at a uniform rate of 2 - 10 mm/minute, the direction of the load being normal to the longitudinal axis of the sample. The point at which the load drops due to the first crack shall be considered the crushing strength. Flanged bearings shall be tested by cutting off the flange and compressing the two sections separately. Each section shall meet the minimum test requirements.
