Preparation of Chromium Carbide Wear-resistant Material

Release time:

2022-02-09 16:25

Source:

Wear is one of the main damage modes of engineering components, and the energy and material consumption caused by the wear of various mechanical parts is amazing. Chromium carbide and wear-resistant cast iron are widely used as wear-resistant materials. In recent years, chromium carbide has been paid more and more attention in theoretical research and practical aspects. At the same time, it is also one of the three main reasons for the failure of mechanical parts (wear, corrosion and fatigue). While improving the work hardening ability, wear resistance and manufacturing performance of chromium carbide, many scholars have done a lot of work in the composition design and manufacturing of chromium carbide, extending the application field of high manganese steel to the field of high strength and high plasticity steel. Let's learn about the preparation of chromium carbide wear-resistant materials!

In order to improve production efficiency, reduce production costs, save resources and energy, it is very important to continuously develop wear-resistant materials with better performance.

Medium-carbon low-alloy wear-resistant cast steel has high hardness, high wear resistance and good toughness in various forms of alloy cast steel components that have become a hot spot in recent years due to their low content of alloying elements. It is widely used because of its simple technology and low cost. However, chromium resources are relatively scarce in China. This paper develops carbon-chromium alloy cast steel, and carbon is the mechanical property of the lining material, for example, hardness chromium carbide is the main alloying element commonly used in alloy wear-resistant cast steel. Because martensite or martensite-bainite can be obtained through chemical composition control and proper heat treatment, the influence of carbon chromium content on mechanical properties (hardness, impact toughness) and wear resistance of test steel is discussed. Therefore, it has good wear resistance.

Composition analysis of worn and unworn areas of chromium carbide

After the chromium carbide wear test, the acquisition conditions were: acceleration voltage: 20.00keV, live time: 28 seconds, and emergence angle: 35.00 degrees. As can be seen from Table 3.3, the samples were observed by scanning electron microscopy, and the components of the worn and unworn areas were analyzed by x-ray. Fe content increased in the wear area, and other components did not change much. The reason for this phenomenon is the high hardness of the wear-resistant steel, which contains material transfer.

Analysis of factors influencing chromium carbide test results

a. Friction experiment external environment: during the experiment, the external environment is the same, so it is not affected by the external environment.

B. Material composition: the content of material composition is the same, so the wear resistance of the above samples is independent of the composition, and the experimental sample configuration is the same.

c. The specimen itself: The specimen is manufactured under limited conditions in the laboratory. Before and after the experiment, it has been ultrasonic cleaned for a long time, but there will be some residues. Therefore, the specimen casting has certain holes, and abrasive powder may enter in the experiment. May have a certain impact.

d. The microstructure of the tested steel: the mechanical properties are also different. The main reason for the different wear properties is the analysis of the tissue photos and mechanical properties of the samples. Due to the different conditions of sample preparation (temperature, time), the microstructure of the samples is different. According to the friction and wear test and the scanning electron microscope analysis of the wear surface, the wear surface of the chromium carbide wear-resistant steel no. 2 and no. 5 samples is flat, with only slight fatigue wear and slight cracks on the surface. The wear rate is low, the overall friction coefficient is high, and it shows good wear resistance. It is mainly a micro-fracture wear mechanism, but also accompanied by the emergence of conglomerate grooves.

The above introduction is the preparation of chromium carbide wear-resistant materials, if you need to know more, you can contact us at any time!