1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2010 02 12 N-STATUS No replacement named S. Ryzyi, NA 2005 01 28 Revised Inserted 3.0; Deleted 3.1, 3.6, 3.7, 4 1996 05 09 Activated N. Kurtycz Printed copies are uncontrolled Copyright 2010, Ford Global Technologies, LLC Page 1 of 2 ALUMINUM
2、ALLOY, COLD FORMED, HEAT TREATED WSS-M2A159-A2 ALUMINUM ALLOY, COLD FORMED, HEAT TREATED WSS-M2A159-A3 NOT TO BE USED FOR NEW DESIGN 1. SCOPE These specifications define an Al Si Cu material. The material is hot forged and then heat treated. 2. APPLICATION These specifications were originally releas
3、ed for the manufacture of scrolls in an A/C compressor produced by the hot forging process. 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 CHEMI
4、CAL COMPOSITION (Weight %) A2 A3 Silicon 9.0 - 11.0 9.0 - 12.5 Iron 0.5 max 0.5 max Copper 2.5 - 3.5 3.5 - 4.5 Manganese 0.3 max 0.2 max Titanium 0.2 max 0.2 max Zinc 0.5 max 0.5 max Magnesium 0.3 - 0.7 0.4 - 0.8 All others 0.2 max 0.1 max Aluminum Balance Balance 3.3 QUALITY 3.3.1 The finished comp
5、onent must be free from material discontinuities, inclusions and segregation. 3.3.2 Microstructure The microstructure shall consist of predominantly fine and uniformly distributed silicon eutectic and metallic compounds in the aluminum. There may be small areas of dendritic alpha aluminum and a few
6、primary silicons. ENGINEERING MATERIAL SPECIFICATIONWSS-M2A159-A2/A3 Printed copies are uncontrolled Copyright 2010, Ford Global Technologies, LLC Page 2 of 2 3.4 MECHANICAL PROPERTIES 3.4.1 Tensile Properties (20 C) (ISO 6892/ASTM E 8M) A2 A3 Ultimate Tensile 360 Mpa 400 MPa Strength, min Yield Str
7、ength 280 Mpa 300 MPa (0.2 % offset), min Elongation, min 3% 2% 3.4.2 The values above are to be measured on test bars machined from the scrolls. The mechanical properties shall be determined after heat treatment. The frequency and detail of mechanical testing will form part of the agreed Control Pl
8、an. 3.4.3 Hardness (unless otherwise stated on Engineering drawing) (ISO 6508/ASTM E 18) Hardness, min HRB 70 min 75 +/- 7.5 (as heat treated) 3.5 HEAT TREATMENT Components will be subjected to heat treatment to achieve the required mechanical properties. The heat treatment shall include a solution
9、heat treatment at 495 +/- 5 C for 20 minute min, followed by water quenching and aging treatment at 200 +/- 5 C for 1 - 1.5 hours. Treatment parameters shall form part of the agreed Control Plan for the individual component. 5. GENERAL INFORMATION The information given below is provided for clarification and assistance in meeting the requirements of this specification. 5.1 PHYSICAL PROPERTIES 5.1.1 Density - 2.72 g/cc at 20 C. 5.1.2 Modules of Elasticity = 79,000 MPa at 20 C. 5.1.3 Coefficient of Thermal Expansion = 20.0 x (10x6)/K (at 20 - 150 C)
