Views:321 Author:Site Editor Publish Time: 2021-11-11 Origin:Site
A Portable Hardness Tester is a kind of hardness testing instrument. Metal Portable Hardness Tester was first defined by rehmer, which indicates the ability of a material to resist hard objects pressing into its surface. It is one of the important performance indexes of metal materials. Generally, the higher the hardness, the better the wear resistance. According to the principle, it can be divided into Leeb Portable Hardness Tester, Rockwell Portable Hardness Tester, Brinell Portable Hardness Tester, shore Portable Hardness Tester, shore Portable Hardness Tester, Babbitt Portable Hardness Tester, micro Portable Hardness Tester, Mohs Portable Hardness Tester, Vickers Portable Hardness Tester, etc. The choice of Portable Hardness Tester must be careful and appropriate. This paper will introduce in detail how to choose a Portable Hardness Tester suitable for yourself.
When selecting a Portable Hardness Tester, it is necessary to combine the size of the test sample. The sample should be taken to the workbench of the machine. You can buy a desktop computer. If it is difficult to move, you can choose a portable one. When you know which scale to test, you can directly choose the machine to test the scale.
For example, HRC, Rockwell Portable Hardness Testers can be selected. On this basis, if the sample is very thin because the test force is 150kg during the HRC test, it is easy to cause the sample to penetrate and cannot measure the real hardness value. At this time, Vickers Portable Hardness Tester is generally selected to test, and Vickers hardness is transformed into HRC, Rockwell, Brinell The thinnest thickness requirement of Vickers specimen can be found in the appendix of international standard.
Rockwell Portable Hardness Tester is widely used in the world at present. Rockwell machine is suitable for testing relatively hard materials. For example, the HRB scale is used in the range of 80-100hrb; For some light metals such as copper, aluminum, lead and cast iron, Brinell Portable Hardness Tester is more suitable. Light metals are relatively soft, and Brinell Portable Hardness Tester has a large indentation and accurate measurement when used;
For some metals with coarse grains, such as cast iron, the indentation of the Brinell hardness test is large, which can avoid the influence of coarse grains and obtain accurate measurement results. At the same time, in the casting industry, Brinell hardness can be converted to the tensile strength of materials;
Vickers hardness almost covers materials from very soft to very hard. It is a universal hardness tester and the most used hardness tester at present.
In the mechanical manufacturing industry, Portable Hardness Tester is often used to check the effect of final heat treatment. Portable Hardness Tester is also a very important tool for quality control in process management and production process. For example, for some fabrication without heat treatment, to avoid mixing and wrong materials, a hardness test shall be carried out. In the machining process, to avoid the performance change caused by annealing due to excessive cutting or grinding, a Portable Hardness Tester shall also be used for supervision. Therefore, the scientific and rational application of Portable Hardness Testers is worthy of attention.
The above is all about how to choose a suitable Portable Hardness Tester in this paper. I hope it will be helpful to you to understand how to choose a suitable Portable Hardness Tester.