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里氏硬度計(jì)是什么原理:
What is the principle of Richter hardness tester?
規(guī)定質(zhì)量的沖擊體在彈力作用下以一定快速?zèng)_擊試樣表面,用沖頭在距離試樣表面1mm處的回彈快速與沖擊快速之比計(jì)算出的數(shù)值就是里氏硬度。里氏硬度計(jì)實(shí)際上是肖氏硬度計(jì)的改進(jìn)型,它們測(cè)定的都是沖擊體在試樣表面經(jīng)試樣塑性變形消耗能量后的剩余能量。
Under the action of elastic force, the impact body of specified mass impacts the surface of the sample rapidly. The Riesler hardness is calculated by the ratio of the springback speed of the punch to the impact speed at the distance of 1 mm from the surface of the sample. Richter hardness tester is actually an improved type of Shore hardness tester. They measure the residual energy of impact body on the surface of sample after plastic deformation of sample consumes energy.
里氏硬度的計(jì)算公式如下:
The formula for calculating Riesler hardness is as follows:
HL=1000×UR/UA
HL=1000*UR/UA
式中:HL ————里氏硬度符號(hào)
In formula: HL-Riesler hardness symbol
UA ————球頭的沖擊快速,m/s;
UA - ball head impact fast, M / s;
UR ————球頭的反彈快速,m/s。
UR --- The rebound of the ball head is fast, m/s.