1、 ENGINEERING MATERIAL SPECIFICATION Date Action Revisions Rev 02 2012 03 06 N Status No usage or replacement G. Weber, NA 2003 10 17 Revised Para 3.0 inserted; para 3.1, 3.7 and 4 deleted 1993 04 07 NE01E10127076-086 Released J. C. Webster, NAAO; G. Lane, EAO Controlled document at www.MATS Copyrigh
2、t 2012, Ford Global Technologies, Inc. Page 1 of 2 SINTERED IRON, NICKEL, MOLYBDENUM, CHROMIUM, WSE-M10A98-A1 TUNGSTEN, VANADIUM, COPPER ALLOY NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is a sintered and heat treated nickel-molybdenum-chromium-tungsten-vanadium
3、copper steel. 2. APPLICATION This specification defines powder metal exhaust valve seats 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 Materi
4、als (WSS-M99P1111-A). 3.2 CHEMICAL COMPOSITION, weight % (ASTM A 751/ASTM E 1019) Total Carbon 0.8 - 1.2 Nickel 0.1 - 0.4 Molybdenum 7.0 - 9.0 Chromium 1.5 - 2.5 Tungsten 2.25 - 3.5 Vanadium 0.5 - 1.5 Copper 8.0 - 11.0 Silicon 0.5 max Manganese 0.5 max Others 0.5 max Any individual element 0.2 max I
5、ron Balance 3.3 DENSITY, g/cc 7.6 min (ISO 2738/ASTM B 328) 3.4 APPARENT HARDNESS HRB 104-112 (ISO 4498/1, ASTM E 18) HV5 285-400 Average of minimum of five readings taken on the wide face surface; no individual reading shall be less than RB 100 or greater than RB 116. Although the HRB scale is spec
6、ified beyond the recommended ranges, these values are commonly used by the powder metal industry for production control purposes. ENGINEERING MATERIAL SPECIFICATION WSE-M10A98-A1 Copyright 2012, Ford Global Technologies, Inc. Page 2 of 2 3.5 MICROSTRUCTURE (ASTM E 3) The microstructure shall consist
7、 of a matrix of tempered martensite with fine dispersed white etching alloy carbides, grains of softer, elongated light etching ferrite, and copper areas dispersed randomly throughout. 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.
