Yes.
Best Practices for Welding Sintered Metals
Keep parts free of contaminants
Residual lubricants, coolants or cleaning solution reduces the weld integrity.
Select material with a lower carbon content
The materials with a 0.0 - 0.5% perform better than the higher carbon blends
Use a higher density
Parts with densities above 6.8 g/cc provide improved weld contact areas