在温度急剧波动情况下工作的柴油机零件(活塞、气缸盖)的损坏,是由于热胀、冷缩(根据热交换的程度)受阻引起的应力增长以及产生的零件的局部温度梯度所造成的。一般情况下,究竟是采用何种材料,什么样的毛坯成型方法对于解决这个问题才有现实意义,其关健在于对从毛坯上取下的试样进行综合的试验,以及对合金的物理—机械性能进行分析。 Damage to diesel engine parts (pistons, cylinder heads) that operate under conditions of extreme temperature fluctuations is caused by increased stress due to thermal retardation, shrinkage (depending on the degree of heat exchange), and local temperature gradients of the resulting parts. Under normal circumstances, what kind of material is adopted and what kind of blank forming method has practical significance for solving this problem. The key point is to conduct a comprehensive test on the sample taken from the blank, Mechanical properties for analysis.