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我厂在进行氮化试验过程中,遇到表面硬度测量的困难。氮化层深度0.4～0.5毫米,测量其表面硬度最好采用维氏表面硬度计,但我厂缺此适当仪器,仅有一般的洛氏硬度计。根据硬度测量的原理,在洛氏硬度计上测定氮化层表面的硬度。测量原理一、方法利用洛氏硬度试验的金刚石圆锥体压头(圆锥角:120°±30′;顶端球面半径:0.2±0.01毫米),负荷采用洛氏硬度计上的预载荷10±0.2公斤。先在洛氏硬度计上加10公斤负荷压入试样,然后在金相显微镜上利用刻度目镜或一般放大镜(40×)来测定
I plant during the nitriding test encountered surface hardness measurement difficulties. Nitride layer depth 0.4 ~ 0.5 mm, the best measure of the surface hardness Vickers surface hardness, but I lack the appropriate instrument plant, only the general Rockwell hardness tester. According to the principle of hardness measurement, the hardness of the surface of the nitride layer is measured on a Rockwell hardness tester. Measuring principle First, the method using Rockwell hardness test diamond cone head (cone angle: 120 ° ± 30 ’; top spherical radius: 0.2 ± 0.01 mm), the load on the Rockwell hardness preload 10 ± 0.2 kg . First, the Rockwell hardness tester plus 10 kg load into the sample, and then use the microscope on a microscope microscope or general magnifying glass (40 ×) to determine