Manufacturing – Casting methods - European Aluminium Association

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1.11.4 VRC / PRC – Mechanical Properties See also: AAM – Manufacturing – 1 Casting methods > Vacuum die castings > Mechanical properties AAM – Manufacturing – 1 Casting methods > Green sand castings Due to anti-gravity turbulance-free filling and directional solidification, the good microstructure leads to excellent mechanical properties. Some parts are used as cast, higher strength requirements are met after heat treatment. A356-F subframe A356-T64 knuckle as cast heat treated Yield strength 85 MPa 230 MPa (typical) Ultimate Strength 150 MPa 300 MPa (typical) Elongation 12 % 11 % (typical) Mechanical properties can be adjusted by heat treatment to meet various requirements. Fig. 5: Comparison of Alcoa's automotive-oriented casting processes VRC / PRC, AVDC and AGSC Version 2002 © European Aluminium Association (auto@eaa.be) 70
1.11.5 VRC / PRC – Examples of parts See also: AAM – Applications – 2 Chassis > Structure and components > Subframe / Rear axle Knuckles from Generation II Machine: A356 - T6 UTS - 276 MPa YS - 207 MPa EL - 8% Source: Alcoa Subframe produced with VRC / PRC : this part is a one piece casting approx. 1200 mm wide Source: Alcoa Version 2002 © European Aluminium Association (auto@eaa.be) 71
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Manufacturing - Casting methods Tab
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1 Casting methods 1.1 Overview of c
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1.3 Green sand castings 1.3.1 Green
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1.3.3 DISAmatic casting Automated g
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Influence of mold filling rate For
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Mould filling by an electro-magneti
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AGSC characteristics leading to cos
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Comparison: Distribution of Rm, con
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Shock Tower: Size 450 x 400 x 250 m
Page 19 and 20: Partly assembled core package for a
Page 21 and 22: Schematic diagram showing the econo
Page 23 and 24: Manual assembly of core packages fo
Page 25 and 26: 1.4.5 Process description - Roll-ov
Page 27 and 28: 1.4.6 Process description - Process
Page 29 and 30: 1.5 Gravity die casting 1.5.1 Chara
Page 31 and 32: 1.5.3 Rotacast ® Rotacast ® is a
Page 33 and 34: 1.6 Low pressure die casting 1.6.1
Page 35 and 36: 1.6.2 LPDC machine With active wate
Page 37 and 38: This 4000 ton (35MN) machine is clo
Page 39 and 40: 1.7.3 Typical automotive applicatio
Page 41 and 42: 1.7.4 Design considerations Low mag
Page 43 and 44: Al18Si (AA 391) Alloy Microstrucutu
Page 45 and 46: 1.8.2 VDC Process Vacuum Dies The p
Page 47 and 48: Shot control using defined paramete
Page 49 and 50: 6: Part is now cool and ready for f
Page 51 and 52: Shock tower Audi A8 Source: Alcoa A
Page 53 and 54: 1.8.5 Mechanical properties *The ta
Page 55 and 56: 1.9.2 UBE squeeze-casting machines
Page 57 and 58: Main processes used today in produc
Page 59 and 60: Metallurgical aspects of semi-solid
Page 61 and 62: 1.10.2 Suitable alloys and their me
Page 63 and 64: Examples of parts which are today i
Page 65 and 66: 1.10.5 Possible defects and ways to
Page 67 and 68: 1.11 Vacuum riserless castings 1.11
Page 69: 1.11.3 VRC / PRC - Processing of ch
Page 73 and 74: 1.12 Lost foam castings 1.12.1 Intr
Page 75 and 76: Pattern molding unit Source: LWF/ZV
Page 77 and 78: 1.12.4 Pouring & finishing Simplifi
Page 79 and 80: 1.12.5 Advantages and disadvantages
Page 81 and 82: 1.13 Comparing casting techniques V
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