Abstract
Diffusion bonding between iron powder compacts was carried out to investigate an effect of graphite content in powder on bonding strength at several bonding temperatures and bonding pressures. The results are as follows:(1) Shear strength of both inside and joi t of iron powder compact subjected to diffusion bonding has a maximum value at graphite content of 0.2 wt% at overall bonding temperatures from 973 to 1273 K and bonding pressures from 10 to 60 MPa.(2) Subsequent sintering at a temperature of 1323 K and for a time of 3.6 ks remarkably improves the shear strength of both inside and joint, which increases linearly with increasing graphite content.(3) Critical bonding condition to obtain 100% of joint efficiency is a temperature of 1073 to 1173 K and a pressure of 20 to 40 MPa for all graphite contents up to 0.8 wt%.
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