In-Situ Machining

What is annealing?

On a molecular level, when a metal such as steel cools down rapidly, the crystalline grains in the metal transform into a lenticular shape. This causes the metal to become harder but also more brittle in the process. Heating the metal to an appropriate temperature causes a homogenous growth of new crystals. The more heat is applied to the metal, the more its ductility increases and its hardness decreases. During annealing, the steel is heated above its critical temperature and held at this temperature for a period of time before controlled cooling. The controlled cooling process allows the crystals to diffuse into a more flexible, cubic-shaped state.

 

SO HOW DOES THIS APPLY TO CRANKSHAFTS?

Sampling Of Crankshaft Annealing Jobs Completed By Goltens Since Receiving GL Class Approval In 2012*

AMERICAS

USA: MaK 8M20, MAN B&W8L27/38

HAITI: Wartsila 18V38

DOMINICAN REPUBLIC: MAN B&W12V28/32, Wartsila 18V46, Wartsila 18VW32B

MEXICO: Bergen BR M8, Bergen 33L8P, MaK 8M25

EL SALVADOR: MaK 16CM32

NICARAGUA: MaK 16CM32

TRINIDAD & TOBAGO: Wartsila 6L46C

ECUADOR: Wartsila 18V26

CHILE: Wartsila 18V32

EUROPE, AFRICA
AND MIDDLE EAST

TURKEY: MAN B&W 6L48/60

SPAIN: Bergen KVG18-G3

ITALY: Bergen B35:40 V12, Bergen KVG16, Bergen KVG 18, Bergen KVGS18-G4.2

VOYAGE IN MEDITERRANEAN: MAN B&W 5L28/32

UNITED ARAB EMIRATES: MaK 6M20, MAN B&W 6L28/32, MAN B&W 6L28/33, Ruston 6RKCM-H, Sulzer 8ZAL40

SEYCHELLES: Sulzer 8ZAL40 SENEGAL: Mitsubishi KU30B

ASIA AND OCEANIA

JAPAN: Colt Pielstick 10PC 4.2V, Mitsubishi KU30B

CHINA: MAN B&W 9L32/40

BANGLADESH: Bergen B35/40V12AG

INDIA: Bergen B35:40 V16AG, Bergen B35:40 V16AG, MAN B&W 7L40/45, MAN B&W 7L40/45

PHILIPPINES: Deutz 6SVM 640, Sulzer 14ZAV40S, Wartsila 18V46

BRUNEI: Mirrlees Blackstone K6, Major MK3

SINGAPORE: MAN B&W 6L28/32

INDONESIA: MaK 8M552, MAN B&W 18V40/45

SAMOA ISLAND: Deutz 12M640

AUSTRALIA: Bergen C25:33L9P

*As of March 2013
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