The quality of heat treatment of industrial aluminum pr […]
The quality of heat treatment of industrial aluminum profile extrusion die directly affects the service life of the extrusion die. The die is quenched and tempered many times to meet the requirement of hardness. Quenching is to improve the hardness of the mold, repeated tempering is to improve the toughness of the mold, to stabilize the internal structure. Special attention should be paid to the heat treatment process of industrial aluminum extrusion die:
1, high temperature heating rate should be fast, the heat preservation time can not be too long, in case the extrusion die overheating or overheating, overheating - large grain, over burning - low melting point elements and inclusions dissolved;
2, aluminum extrusion dies should be tempered in time, in order to prevent cracks;
3, after the extrusion mold heat treatment found that hardness is not enough or uneven hardness, should be annealing, according to the process of RE heat treatment (when the hardness value
4, for large aluminum extrusion die or mold cavity complex finished mold, should add a stress relief process (eliminate electrical processing, machining stress, that is to eliminate thermal stress and organizational stress);
5, mold quenching oil temperature should be controlled at 100 degrees C, in order to ensure the effect of quenching.