Compositions of manganese sulfide compound added for making sintered product

Abstract

Compositions of a manganese sulfide (MnS) compound useful as additives for making a sintered product are disclosed, in which molybdenum (Mo) or Fe—Mo is added to the MnS compound to improve machinability and to obtain a more stable MnS compound, thereby reducing any change in weight and size in a sintering process. The compositions can suppress erosion of parts in a sintering furnace during a sintering process, prevent sooting on a surface of the sintered product from occurring, and enhance resistance to moisture in the air to keep the sintered product in the air for a long time.

What is claimed is:  
     
         1 . A composition of manganese sulfide (MnS) useful as an additive for making a sintered product comprising MnS and added molybdenum (Mo) or Fe—Mo in an amount effective to improve machinability.  
     
     
         2 . The composition of  claim 1 , comprising about 0.5 wt % to about 10 wt % added Mo.  
     
     
         3 . The composition of  claim 1 , comprising about 4 wt % to about 8 wt % added Fe and about 0.5 wt % to about 15 wt % added Mo.  
     
     
         4 . The composition of  claim 3 , comprising about 1.0 wt % to about 6.0 wt % added Mo.