WEAR RESISTANT RING WITH COOLING CAVITY AND METHOD FOR MANUFACTURING THE SAME

摘要

PROBLEM TO BE SOLVED: To provide a wear resistant ring with a cooling cavity superior in manufacturability and capable of stably preventing separation of a wear resistant ring main body and a cooling cavity-forming member. SOLUTION: Graphite powder is mixed in alloy steel powder to make a mixture of powder. A pair of green compacts having a shape dividing a wear resistant ring of a near shape into two in a height direction and having a step part over the whole circumference of the end part to make a section of a roughly U-shape after sintering on an inner circumference surface is made of the mixture of powder. An annular cooling cavity forming ring member is put between inner circumferences of a pair of the green compacts. The green compacts are sintered to be sintered bodies and the wear resistant ring main body made of sintered body and a cooling cavity forming ring member are sintered and bonded at tip of the step part to form a unit. The alloy steel powder is preferably austenitic stainless steel powder.