1.Impact of carbon It can be seen from Fig. 1 and Fig. 2 that the toughness of steel decreases with the increase of carbon content, and the hardness increases. This is mainly because carbon not only strengthens the matrix in steel, but also increases the hardenability of steel. Although...
Carbon is the main element in steel and plays a decisive role in the matrix structure of steel. A small amount of carbon is dissolved in ferrite, and the rest exists in the form of cementite. Carbon is the main element of strengthening, but in order to reduce the...
Most of the shovel teeth of roadheader work in the environment of high impact, high wear and high hardness, so the materials must have high impact toughness and high hardness. Bainitic steel has good comprehensive mechanical properties and relatively low cost, which has attracted much attention in recent years....
The wear-resistant parts of sand casting crusher are still very common in China, such as jaw plate, high chromium plate hammer, crushing wall, rolling mortar wall, etc., because in the crusher equipment, as a relatively large wear-resistant casting, the accuracy is not very high, especially for jaw plate, the...
The bimetallic jaw wear-resistant castings were successfully wound by using the bimetallic liquid winding injection / transformation molding technology of wear-resistant castings. The composite casting method includes two process steps of “changing the upper mold” and “bimetallic liquid sparing injection”. The process adopts the winding injection mode of high...
1. Ordinary white cast iron Ordinary white cast iron can only be used in as cast state, and carbon atoms mainly exist in the form of Fe3C. The matrix structure of as cast ordinary white cast iron is pearlite or ferrite, i.e. ledeburite structure, and the hardness is about...
There are two traditional methods to obtain bainitic steel: (1) Isothermal quenching method: heat the steel to a certain temperature above AC1 or AC3 for austenitizing to obtain austenite structure, and then quench it to the medium temperature zone at a cooling rate greater than the critical speed. Heat...
As shown in Figure 1, the types of bainite structure include upper bainite, lower bainite, carbide free bainite, granular bainite, quasi bainite, etc. The upper bainite is feathery and has obvious crystal trend. The carbides in the upper bainite are rod-shaped and distributed in parallel between the ferrite laths....
The chemical composition has a great influence on the mechanical properties and microstructure of bainitic Martian multiphase wear-resistant cast steel. The depressing effect of alloying elements on bainite phase transition temperature (BS) point and martensite phase transition temperature (MS) point directly affects the morphology and properties of bainite structure....
The photos of the conical crusher liner before and after use taken at the workshop site are shown in Figure 1. Figure 1A shows that the liner surface is clean and the polished part is flat and bright before assembly. From figure 1b, it can be seen that the...