Why does the tensile strength of the H13 alloy produced by binder jetting using 5-25 μm at 1380 °C and 50mtorr decrease from 1500 MPa to 400 MPa as the sintering time increases from 2h to 20h, while the elongation increases from 6.5% to 20% and the relative density increases from 90.9% to 96.3? Any suggestions for improving the sintering process?
Jean-Pierre Van Nieuwenhoven
Dear CAi Jiawei, the longer the sintering time the better the completion of sintering process. The strength reduction is probably a matter of over aging effect and the density increase should simply come from the fact that if sintering time is increased, it give more time to the powder materials to melt more completely and to tend to full molten material.
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