This stipulates on ejector pin used in zinc alloy and aluminum alloy die-casting mold.
It uses SKD-61(Steel alloy for hot processing) and has the properties that can excellently withstand thermal impact and fatigue. Accordingly, it is used widely in hot press mold, various dies and die-block production, as well as being used broadly as hot processing tool by utilizing its wear resistance and thermal resistance properties.
(Diagram 1) illustrates the surface structure of SKD-61 following GAS softening processing after having undergone quenching and tempering (Q.T.) process. It clearly displays identifiable compound layer (6-10㎛) and thick diffused layer (0.2mm).
(Diagram 2) illustrates the cross-sectional hardness after nitrified thermal processing of quenching and tempering (Q.T.) processed product of our company and other ordinary products. Although there is not much difference in the surface hardness, there is substantial difference in the diffused layer and internal hardness.
(Diagram 3) compares the cross-sectional hardness up to the diffused layer of quenching and tempering (Q.T.) processed product of our company and other ordinary products. Substantial difference in hardness can be observed