BMW N47 Crankshaft 2.0 DIESEL N47D20 ENGINE

BMW N47 CRANKSHAFT is the most important part of the engine. It bears the force transmitted by the connecting rod and converts it into torque through the crankshaft output and drives other accessories on the engine to work. Diesel BMW N47 Engine Crankshaft is affected by the centrifugal force of the rotating mass, the periodically changing gas inertial force and the reciprocating inertial force, so that the crankshaft is subjected to bending and torsional loads. Therefore, Crankshaft for N47 Engine is required to have sufficient strength and rigidity, and the surface of the journal must be wear-resistant, work evenly, and have good balance.

Quenching process and purpose

●Heating the workpiece to the austenitizing temperature and keeping it for a certain period of time, and then cooling at a rate greater than the critical cooling rate to obtain the heat treatment process of the martensitic structure.

●The purpose is to improve the hardness and wear resistance of the workpiece

Low temperature tempering process and purpose

●Heat treatment process in which the quenched steel is reheated at 250°C for heat preservation and then cooled down.

●The purpose is to maintain the high hardness and wear resistance of the quenched workpiece, and reduce the quenching residual stress and brittleness.

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