发动机是汽车的“心脏”，而曲轴是发动机的关键零部件，是发动机中成本最高

发动机是汽车的“心脏”，而曲轴是发动机的关键零部件，是发动机中成本最高的零件。现代化的发动机对曲轴毛坯提出了有6拐、呈120°分布、带12个整体平衡块的要求。在机型改造的过程中，首先遇到的问题就是曲轴强度不足，一般是通过加粗轴颈、优选材质和表面强化等方法来增大曲轴强度，从而满足功率提高的要求。加粗轴颈在生产实践中受到各方面条件的限制，应用范围较窄，所以选择合适的材料和适宜的表面强化方法是解决曲轴强度的主要途径。

发动机是汽车的“心脏”，而曲轴是发动机的关键零部件，是发动机中成本最高的零件。 现代化的发动机对曲轴毛坯提出了有6拐、呈120°分布、带12个整体平衡块的要求。 在机型改造的过程中，首先遇到的问题就是曲轴强度不足，一般是通过加粗轴颈、优选材质和表面强化等方法来增大曲轴强度，从而满足功率提高的要求。 加粗轴颈在生产实践中受到各方面条件的限制，应用范围较窄，所以选择合适的材料和适宜的表面强化方法是解决曲轴强度的主要途径。

The engine is the "heart" of the car, and the crankshaft is the key part of the engine, which is the most expensive part in the engine. The modern engine has put forward the requirements of crankshaft blank with 6 turns, 120 ° distribution and 12 integral balance weights. In the process of model transformation, the first problem is that the strength of crankshaft is insufficient. Generally, the strength of crankshaft is increased by thickening the journal, optimizing the material and strengthening the surface, so as to meet the requirements of power improvement. Due to the limitation of various conditions in the production practice, the application range of the thickened journal is narrow, so the main way to solve the strength of crankshaft is to choose the appropriate material and the appropriate surface strengthening method.<br>