Ring having improved weight, durability, damage resistance, shine and workability features

Abstract

A ring and method of manufacturing a ring which may include: an outer ring, in which a second carbide composed of a combination of tungsten carbide, iron group carbide or carbonitride is mixed with a metal binder phase at a predetermined ratio, in which the outer ring is divided into a first outer ring and a second outer ring formed in a shape corresponding to each other; an inner ring separately and/or independently assembled between the first and second outer rings, in which the inner ring includes an outside inner ring that forms an outer circumferential surface of the ring and an inside inner ring that forms an inner circumferential surface of the ring; ring fitting parts formed on the first and second outer rings, respectively, such that both sides of the outer and inside inner rings are press-fit; and assembling protrusions formed on the first and second outer rings, respectively, to be inserted into the outer circumferential surface of the inside inner ring to maintain a firm assembly between the outer ring and the inner ring for a long period of time.

What is claimed is: 
     
         1 . A ring comprising:
 an outer ring, wherein a second carbide composed of a combination of tungsten carbide, iron group carbide or carbonitride is mixed with a metal binder phase at a predetermined ratio, wherein the outer ring is divided into a first outer ring and a second outer ring formed in a shape corresponding to each other;   an inner ring separately assembled between the first and second outer rings, wherein the inner ring comprises an outside inner ring that forms an outer circumferential surface of the ring and an inside inner ring that forms an inner circumferential surface of the ring;   ring fitting parts formed on the first and second outer rings, respectively, such that both sides of the outer and inside inner rings are press-fit; and   assembling protrusions formed on the first and second outer rings, respectively, to be inserted into the outer circumferential surface of the inside inner ring to maintain a firm assembly between the outer ring and the inner ring for a long period of time.   
     
     
         2 . The ring according to  claim 1 , wherein the ring fitting parts comprise an upper fitting part to which the outside inner ring is coupled and a lower fitting part to which the inside inner ring is coupled. 
     
     
         3 . The ring according to  claim 1 , further comprising a chamfered portion formed on the outer circumferential surface at an angle of 30 to 50°, and a plurality of decorative grooves configured at a predetermined spacing along a circumferential surface, thereby improving an exterior appearance of the ring and also facilitating separation of the outer ring and the inner ring. 
     
     
         4 . The ring according to  claim 1 , wherein the assembling protrusions comprise support parts formed on upper ends to support an inner circumferential surface of the outside inner ring, and assembling parts formed on lower ends to be inserted into an outer circumferential surface of the inside inner ring. 
     
     
         5 . The ring according to  claim 4 , comprising first and second assembling grooves formed in the inside inner ring in a shape corresponding to the assembling parts to receive the assembling protrusions inserted therein. 
     
     
         6 . The ring according to  claim 1 , wherein the outer ring is formed with a composition ratio of, based on a total weight thereof, 10 wt % to 49 wt % of tungsten carbide, 35 wt % to 60 wt % of a second carbide composed of carbides or carbonitrides of 4a, 5a and 6a iron group elements of the periodic table, and 10 wt % to 30 wt % of nickel or stainless alloy metal binder phase. 
     
     
         7 . The ring according to  claim 1 , wherein the outside inner ring is composed of either of surgical titanium or gold, or a mixture of both the surgical titanium and gold at a predetermined amount. 
     
     
         8 . The ring according to  claim 1 , wherein the inside inner ring is composed of either of surgical stainless steel or gold, or a mixture of both the surgical stainless steel and gold at a predetermined amount.