What are the classification methods of metallographic microscopes?- Trojan (Suzhou) material technology Co., Ltd.

What are the classification methods of metallographic microscopes?

01-04-2022

1. Metallographic microscopes are classified by form
From the perspective of optical path form, it can be divided into two categories: upright and inverted. The microscope with the objective lens above the sample and observing the observed surface of the sample from top to bottom is classified as an upright metallographic cutting machine; conversely, the microscope with the objective lens below the sample and observing the observed surface of the sample from bottom to top is classified as a microscope. It is an inverted metallographic cutting machine.

(1) Features of upright metallographic cutting machine
①The sample is placed on the observed surface upwards;
②The observed surface of the sample must be parallel to the bottom surface to ensure that it is perpendicular to the optical axis of the objective lens;
③ The sample is observed facing upwards, which is not easy to be damaged;
④Easy to operate, suitable for quick inspection;
⑤ The sample is limited by geometric shapes such as height;
⑥ The shockproof requirements of the whole machine are high when taking pictures.
(2) Features of inverted metallographic cutting machine
①The sample is placed under the observation surface;
②The observed surface of the sample is always perpendicular to the optical axis of the objective lens;
③ The sample is placed under the observation surface, and it is attached to the surface of the stage, which is easy to be damaged;
④ It is inconvenient to manually change the objective lens, the operation is not fast, and it is not suitable for rapid inspection;
⑤ The sample is not limited by geometric shapes such as height;
⑥The photography is generally connected with the base, and the shockproof performance is good.

2. Metallographic microscopes are classified by shape
Traditionally, metallographic microscopes can be divided into three categories: desktop, vertical, and horizontal according to their appearance.

3. Metallographic microscopes are classified by performance parameters and uses
Due to the needs of development, metallographic microscopes are developing in the direction of high quality, multi-performance and multi-purpose. According to their performance parameters, they can be divided into three categories: primary type, intermediate type and advanced type.

(1) Primary metallographic microscope
It can be used for bright field observation and image recording, with simple structure and small size. It is mainly used for general metallographic structure analysis in metallographic laboratories in factories and schools, and is generally operated manually.

(2) Intermediate metallographic microscope
It can be used for bright field, dark field, polarized light observation and image recording. It is mainly used for metallographic analysis in factories and colleges and universities. Sometimes additional functions such as high temperature hot stage and microhardness test are required. Currently, it is generally semi-automatic (electric) operate.

(3) Advanced metallographic microscope
It has observation functions such as bright field, dark field, polarized light, phase contrast, differential interference contrast, as well as image recording, microhardness testing and other functions. It is used for metallographic research in large and medium-sized factories, colleges and universities and research departments. After the image recording device obtains the image under the microscope, it also needs to perform quantitative analysis such as image analysis, which requires the microscope, digital camera and computer systems to be fully automated through software.