The copper brittleness defects control of nm400 wear resistant plate

NM400 wear resistant plate 2020 stock in Tianjin: 7*2920*8200, 32*3000*7440, 14*2150*9300, 16*2200*10000, 12.5*2900*11000, 7*2920*8200, 14*1950*11000, 80*2200*10000, 16*2230*7650, 7*2920*8780, 32*2900*9700, 20*1950*9550, 10*2200*7200, 23.1*2590*7790, 20*1400*11400, 20*1950*9700, 7*2920*8780, 20.9*2851*7000, 25*1600*9300, 30*2200*9000, 14*1950*10550, 30*1600*8600.

Both the cross rolling method and the extrusion method must first heat the tube blank or ingot, and the steel tube produced is called hot rolling tube. Steel pipes produced by hot working can sometimes be cold worked as required. There are two methods of cold working: one is cold drawing, that is, drawing the NM400 wear resistant plate steel pipe through the drawing die to make the steel pipe gradually thin and elongate; the other is cold rolling, which is the method of applying the hot rolling mill invented by the menesmann brothers to cold working. The cold working of NM400 wear resistant plate seamless steel pipe can improve the size accuracy and finish of steel pipe, and improve the mechanical properties of materials.

Oxygen (O) is a harmful element in steel such as NM400 wear resistant plate. Although manganese, silicon, iron and aluminum are added to deoxidize the steel at the end of steelmaking, they can not be removed completely. During the solidification of molten steel, the reaction of oxygen and carbon in the solution will produce carbon monoxide, which can cause bubbles. Oxygen mainly exists in the form of FeO, MnO, SiO2, Al2O3 and other inclusions in the steel, which reduces the strength and plasticity of the steel. Especially, it has serious influence on fatigue strength and impact toughness.

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