The heat treatment knowledge of hardox 450 astm equivalent

Manganese steel plate is subdivided according to material grade: Q345A, Q345B, Q345C, Q345D, Q345E, Hardox 450 astm equivalent. The main differences according to the classification are as follows: A needs no impact test, B needs room temperature impact test (20 degrees above zero), C needs zero degree impact test, D needs minus 20 degree impact test, and E needs minus 40 degree impact test. The most important characteristic of manganese steel plate is that under the condition of strong impact and extrusion, the surface layer rapidly hardens, but the core still maintains good toughness and plasticity, and the hardened layer has good wear resistance.

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As the thickness and hardness of Hardox 450 astm equivalent increase, the tendency to crack at the cutting edge increases. In order to prevent the Hardox 450 astm equivalent from cutting cracks, preheating should be carried out before Hardox 450 astm equivalent cutting. Special attention should be paid to preheating to make the entire Hardox 450 astm equivalent interface evenly heated to avoid local overheating in the area contacting the heat source. If the whole Hardox 450 astm equivalent cannot be preheated, the partial preheating method can be used instead.

Hardox 450 astm equivalent controlled rolling is that, on the basis of adjusting the chemical composition of Hardox 450 astm equivalent, by controlling the heating temperature, rolling temperature, deformation system and other process parameters, the change law of austenite structure and the microstructure of phase transformation products are controlled, so as to achieve the purpose of refining the structure and improving the strength and toughness of Hardox 450 astm equivalent.

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