Products Description
Wear-resistant plate is a kind of product type with bright brightness in wear-resistant steel plate, the hardness of wear-resistant plate is large, and the range of use is relatively wide, which can be realized in almost engineering and mechanical industries. The performance of the wear-resistant plate is relatively good, and the direct reason for its wide use is that the density is relatively large.
The density of the wear-resistant plate is higher than that of some materials, so that its hardness is relatively large. The density of steel generally used for wear-resistant plates is 7.85kg/dm cubic, after quenching martensitic structure, tempering in the temperature range of 450~600℃; Or at 650℃ after tempering at a slow cooling rate of 350~600℃.
Or after tempering at 650 ° C, long-term heating in the temperature range of 350~650 ° C will cause embrittlement of the wear-resistant plate. If the embrittlement of the wear-resistant plate is reheated to 650 ° C and then quickly cooled, the toughness can be restored, so it is also called reversible tempering brittleness, and the high-temperature tempering brittleness is shown as the toughness of the wear-resistant plate and the increase of the brittleness transformation temperature.
The sensitivity of abrasion plate to high temperature tempering brittleness is generally expressed by the difference of toughness and brittleness transformation temperature between the toughening state and the embrittlement state. The more serious the tempering brittleness at high temperature, the higher the intergranular fracture ratio of wear-resistant steel plate. The effect of the elements in the wear-resistant plate on the high-temperature tempering brittleness is divided into two aspects, on the one hand, the impurity elements such as phosphorus, tin, antimony, etc. that cause the high-temperature tempering brittleness of the wear-resistant plate; Another aspect is alloying elements that promote or slow down high-temperature tempering brittleness in different forms and to different degrees.
For example, chromium, manganese, nickel, silicon and so on play a promoting role, while molybdenum, tungsten, titanium and so on play a delaying role, carbon also plays a promoting role. General carbon wear-resistant steel is not brittle to high temperature tempering. Sensitive, containing chromium, manganese, nickel, silicon binary or multi-component alloy steel is very sensitive, its sensitivity varies according to the type and content of alloying elements.
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