Reduced iron powder plays a role in the foetus of gold steel.

After joining the reduced iron powder, can make the diamond tools matrix alloying degree increase, uniform sintered body organization, holding force of a diamond, 

soaking in sintering holding time short low melting point metal loss is small, compact structure, good self-sharpening.

It can extend the wearability of diamond tools and improve the tool's sharpness to achieve the purpose of improving the comprehensive performance of gold and 

steel stone tools.