整体辗钢轮损坏的原因通常是闸瓦制动机工作不当轮辋热负荷超过限度。当达到相应的温度区时,材料的结构能发生变化,同时,由超热负荷产生自身内应力。这些现象即使制动负荷正常也会发生,但在一定条件下轮辋热应力达到这样大的数值和如此分布,以致能使材料局部损坏。轮缘表面缺陷引起的应力集中也会成为材料损坏的先决条件。使材料损伤起明显作用的,还有轮上打的钢印和旋轮机床留下的夹具痕 The overall cause of damage to the drum is usually due to improper operation of the brake shoe. The rim thermal load exceeds the limit. When reaching the corresponding temperature zone, the structure of the material can change, at the same time, by the super-heat load to produce their own internal stress. These phenomena occur even if the brake load is normal, but under certain conditions the rim thermal stress reaches such a large value and is distributed so as to locally damage the material. Stress concentration due to rim surface defects can also be a prerequisite for material damage. So that material damage played a significant role, as well as the wheel hit steel stamping and roller jig left by the machine marks