论文部分内容阅读
我厂对20高锡铝基钢带的硬度检查,按沪Q/YB729—84标准要求:钢背HB·2.5/62.5/10=170～240;合金层HB·2.5/15.6/60=22～32。 一般工厂均无小负荷硬度计(特别是15.6的负荷),而我厂只有HB—3000硬度计。故只能送我区计量部门于民主德国产的HP250型硬度计测定。然送检因路远,不能及时取回数据,延误入库和投产使用。为此,我们试图在现有的HR150型洛氏硬度计上测定之途径,按照布氏硬度法原理,经多次试验,与H P250型硬度计测定值比较,二者的硬度值接。测定依据和测定对比如下:
Our factory on 20 high tin aluminum-based steel hardness check, according to Shanghai Q / YB729-84 standard requirements: steel back HB · 2.5 / 62.5 / 10 = 170 ~ 240; alloy layer HB · 2.5 / 15.6 / 60 = 22 ~ 32. General factory no small load hardness tester (especially the load of 15.6), and my factory only HB-3000 hardness tester. It can only be sent to my district metrology department in Germany, the German-made HP250 hardness measurement. However, due to the delivery of inspection, can not retrieve the data in time, delayed storage and put into operation. To this end, we tried to determine the existing HR150 Rockwell hardness on the way to measure, according to Brinell hardness principle, after many tests, and H P250 hardness measured values, the hardness value of both access. Measurement basis and determination of contrast as follows: