使用光学立体镜和REM评估断裂表面。总体上，评估了用于拉伸机械测试的四

总是从中到，并且是光学立体镜和REM评估断裂表面。总体是，，，评估了拉伸拉伸机械的的四个棒的。 P，每种杆<br><br>类型的轮子。选择的棒的的值为值为RP02 02延伸率A5低于最小允许极限。<br>由于由于断裂面的巨大而而无法在轮杆1和2的断裂面上到到任何明显的现象（安静的凝固和旋转），仅检查来自轮0轮3杆（连续铸造和过程过程中振动）。<br>•断裂表面-轮毂0的杆（连续铸造）-安静凝固的<br><br>为了评估毂0轮的断裂表面，选择直径为6 mm的测试棒，该测试棒的和延伸率Rp0.2 A5值都非常低。在一些批量生产的试棒样品中，低机械值通常由于大型轮毂中部形成的微收缩。<br>在可以上上可以看到几个，，地方，，，，，大破裂破裂破裂破裂破裂破裂破裂破裂这由由大的粗粒颗粒引起的。

ののの[ののREM]。总体上,评估了用于拉伸机械测试的四个测试棒的断裂表面。目的是评估是什么原因导致拉伸试验中机械量值偏低。总是从中选择一根杆<br><br>每种类型的轮子。[Rp02.[A5].<br>由于由于断裂面的巨大碎裂而无法在轮杆1和2的断裂面上观察到任何明显的现象(安静的凝固和旋转),因此仅检查了来自轮0和3的杆(连续铸造和凝固过程中的振动)。<br>•断裂表面-轮毂0的杆(连续铸造)-安静的凝固<br><br>[0]，[6毫米の]，[-Rp0.2]在一些批量生产的试棒样品中,低机械值通常是由于大型轮毂中形成的微收缩所致。<br>在断裂表面上可以看到几个带有微带的地方,这导致较低的机械测试值。另外,可以看到大的粗糙的破裂区域,这是由大的粗晶粒引起的。

The fracture surface was evaluated using optical stereoscope and rem. In general, the fracture surfaces of four test bars used for tensile mechanical testing were evaluated. The purpose is to evaluate what causes the low mechanical values in tensile tests. Always choose one of the sticks<br>Each type of wheel. The yield strength value of the selected test bar is rp02, and the elongation A5 is lower than the minimum allowable limit.<br>Since no obvious phenomena (quiet solidification and rotation) could be observed on the fracture surfaces of wheel rods 1 and 2 due to the large fragmentation of the fracture surfaces, only the rods from wheels 0 and 3 (vibration during continuous casting and solidification) were examined.<br>· fracture surface - rod of hub 0 (continuous casting) - quiet solidification<br>In order to evaluate the fracture surface of hub 0, a 6 mm diameter test bar was selected, which had very low Rp0.2 and elongation A5 values. In some mass-produced test bar samples, the low mechanical value is usually due to the micro shrinkage formed in the large wheel hub.<br>On the fracture surface, several places with microstrip can be seen, which leads to lower mechanical test values. In addition, large coarse fracture areas can be seen, which are caused by large coarse grains.<br>