The alloy elements of the NM500 wear-resistant plate mainly help to strengthen its resistance to pressure, so that it will not cause unnecessary failures when the steel plate is used. As we all know, the main requirement of wear-resistant plates is to have good pressure resistance, because it is used for building support in most cases, so the pressure resistance requirements are relatively high. But in other aspects the cost performance is also quite high, so let's take a look at it in detail below.

     The new NM500 wear plate is characterized by low carbon (≤0.1%) and low sulfur (≤0.015%). Commonly used alloying elements can be divided into: solid solution strengthening elements (Mn, Si, Al, Cr, Ni, Mo, Cu, etc.) according to their role in the strengthening mechanism of NM500 wear-resistant plates; Nb, V, Ti, N, etc.); precipitation hardening elements (Nb, V, Ti, etc.) and phase transformation strengthening elements (Mn, Si, Mo, etc.) (see metal strengthening) form pearlite or The alloy carbides dispersed and precipitated strengthen the steel. In order to form a certain amount of carbon-nitride in microalloy steel, the carbon content only needs to be 0.01-0.02%; so carbon reduction is an inevitable trend in the development of this type of steel, which can greatly improve the toughness and welding performance [1] High The higher Mn/C ratio is good for improving the yield strength and impact toughness of NM500 wear-resistant plate.

     Manganese can reduce the γ→α transition temperature; it is beneficial to the nucleation of acicular ferrite; it can increase the solubility of carbon-nitride forming elements in γ-Fe during heating, thereby increasing the carbide in ferrite The amount of dispersed precipitation. In addition, the change in the stress/strain characteristics of the NM500 wear plate due to high manganese can offset the strength loss of the Bauschinger effect. Most low-alloy high-strength steels are not alloyed with silicon, but in hot-rolled ferritic-martensitic multiphase steels, silicon is an indispensable additive element. It has higher strength and higher toughness than traditional ferritic-pearlite steel. Molybdenum has an inhibitory effect on the pearlite transformation of steel during cooling.