摘要
冷轧薄板往往采用维氏硬度试验方法测试硬度,测试过程复杂,且随着板材厚度越来越薄,测试后试样被压头穿透现象越来越明显,试验测试结果波动较大,测试结果偏离实际值。改用表面洛氏硬度试验方法,通过比对不同的试样处理方法以及不同的表面洛氏硬度测试标尺测试硬度值,并与维氏硬度测试结果进行比较,发现采用选用HR15T和HR30T标尺的表面洛氏硬度试验方法,并将试样支座变换为金刚石支座测试冷轧薄板硬度,可以省去试样表面打磨或者抛光程序,且测试后试样背面无明显痕迹,测试结果离散性小,精度高,适合冷轧薄板的硬度测试。
Vickers hardness testing process for cold rolled sheet is very complicated. Along with the thickness of cold rolled sheet decreases, the phenomena of the sample being penetrated by the indenter ball become more distinct, so that the testing result fluctuats seriously and it is largely away from the true value. In this investigation, different scales of superficial rockwell hardness and different sample treatment methods were adopted, and the superficial rockwell hardness testing results had been compared with the vickers hardness testing results. Comparison results show that, HR15T and HR30T superficial rockwell hardness testing methods with diamond support adapted to the hardness testing of cold rolled sheet. In the HR15T and HR30T test, the polishing process of sample surface is un- necessary, and there were no obvious indentations on the back of the test piece, resulting into small divergence and high accuracy.
出处
《物理测试》
CAS
2013年第4期18-21,共4页
Physics Examination and Testing
关键词
冷轧薄板
维氏硬度
表面洛氏硬度
金刚石支座
离散性
cold rolled sheet
vickers hardness
superficial rockwell hardness
diamond support
divergence
