渗氮层、淬硬层、有效硬化层的硬度和厚度测试简介（Test of hardness and thickness of nitrided layer, hardened layer and effective hardening layer）.docVIP

渗氮层、淬硬层、有效硬化层的硬度和厚度测试简介（Test of hardness and thickness of nitrided layer, hardened layer and effective hardening layer） Hardness and thickness test of nitrided layer, hardened layer and effective hardening layer. First, hardness and thickness testing method of steel parts after nitriding (nitriding): With the development of industry, nitriding treatment has been used more and more in all walks of life. The demand for nitriding treatment is also increasing. Here is a brief description of the hardness and thickness test of steel parts after nitriding treatment. The main technical requirements of nitriding (gas nitriding, plasma nitriding, carbonitriding and glow plasma nitriding) are effective nitriding layer depth, surface hardness and local hardness. Some parts also have the brittleness rating requirements of nitrided layer, and all the above requirements should be tested by micro hardness test of Vivtorinox. The nitrided layer is divided from the metallographic structure, including the depth from the outermost compound layer (Bai Liangceng) to the boundary between the diffusion layer and the matrix. The microhardness test of micro - Vivtorinox is based on the vertical distance between the workpiece surface and the hardness of the matrix. The depth of the nitrided layer is indicated by the letter DN. Method for detecting depth and hardness of nitrided layer: 1. Preparation of sample A, the sample should be cut from the nitriding parts, such as the workpiece can not be damaged, but also with the same parts and materials of the same treatment process of small samples after cutting and testing. B, should pay attention to when the specimens are cut, should be perpendicular to the surface of the nitrided layer (sampling sampling method for metallographic specimen), sampling after grinding and polishing processing necessary, in grinding and polishing should pay attention to the cooling process, the workpiece can not overheating, do not appear chamfer edge. C and check the