1、 ENGINEERING MATERIAL SPECIFICATION Date Action Revisions Rev 02 2012 03 06 N Status No usage or replacement G. Weber, NA 2003 10 15 Revised Para 3.0 inserted; para 3.1, 3.6, 3.7 and 4 deleted 1998 03 16 Activated P. Lee, D. Rogers Controlled document at www.MATS Copyright 2012, Ford Global Technolo
2、gies, Inc. Page 1 of 2 SINTERED IRON, CARBON COPPER MOLYBDENUM STEEL, WSS-M10A102-A1 MACHINING ADDITIVES NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is a sintered carbon, copper molybdenum steel with machinability enhancing additives. 2. APPLICATION This specifi
3、cation was released originally for material used in valve guide inserts up to 50 mm length. 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). Part prod
4、ucers using this material in their products, must use Ford approved materials and must conform to a process control plan which has been approved by STA and/or the relevant Materials Activity. 3.2 CHEMICAL COMPOSITION, weight % (ASTM A 751/ASTM E 1019) Total Carbon 0.7 - 1.2 Molybdenum 0.1 - 0.45 Cal
5、cium 0.05 - 0.4 Copper 1.50 - 4.5 Sulfur 0.1 - 0.4 Others 1.0 max Iron Balance The composition shall be selected from within the above range in order to meet machinability, microstructure and strength requirements. 3.3 DENSITY, g/cm3 6.5 - 7.0 (ISO 2738/ASTM B 328) For valve guides 50 mm or less, th
6、e density variation between the central third and outer third lengths shall be 0.4 g/cm3 max. 3.4 APPARENT HARDNESS 60 - 90 HRB (ASTM E 18/ISO 4498/1) ENGINEERING MATERIAL SPECIFICATION WSS-M10A102-A1 Copyright 2012, Ford Global Technologies, Inc. Page 2 of 2 3.5 MICROSTRUCTURE (ASTM E 3/ASTM E 562)
7、 The microstructure shall consist primarily of a fine pearlitic matrix with randomly distributed metallic sulfides and a fine distribution of machining additive particles throughout. Also present will be Molybdenum rich zones, particles of copper at the original particle boundaries, and interconnect
8、ed porosity distributed uniformly throughout. 5. GENERAL INFORMATION The information given below is provided for clarification and assistance in meeting the requirements of this specification. 5.1 MECHANICAL PROPERTIES AT TEMPERATURE Test methods are to be agreed with Ford and the supplier, and wher
9、e necessary, quoted in the control plan. Room Temperature 200 C 0.2% Compressive Yield, typical, MPa 410 420 Youngs Modulus, typical, GPa 120 120 Bulk Hardness, Rockwell 30N 28 25 5.2 PHYSICAL PROPERTIES AT ELEVATED TEMPERATURES 100 C 200 C Thermal Conductivity, typical, Wm-1 K-1 31 31 (ASTM E 1461) For Temperature Range: Room Temperature - 300 C Thermal Expansion Coefficient, typical, x10-6 K-1 - 13 (ASTM E 228)
