Pick with a reentrant

1. A pick adapted to degrade man-made or natural formations, comprising:

a steel body comprising a shank adapted for attachment to a driving mechanism;

a leading edge opposite the shank, the leading edge comprising an inside edge;

a bore formed in the steel body proximate the inside edge;

a cemented metal carbide core press fit into the bore; and

a chamfered reentrant at least partially formed in the bore that prevents cracking in the steel body during operation;

wherein the core is segmented.

2. The pick of claim 1 , wherein the reentrant joins the inside edge to the bore.

3. The pick of claim 2 , wherein a distance from the leading edge to an end of the reentrant is 0.02 to 1 inch.

4. The pick of claim 2 , wherein the distance from the leading edge to the end of the reentrant is 25% to 100% of a thickness of a diamond material bonded to the core.

5. The pick of claim 1 , the reentrant is formed proximate a base of the bore.

6. The pick of claim 1 , wherein the cemented metal carbide core is press fit into the steel body with an interference of between 0.0005 and 0.004 inch.

7. The pick of claim 1 , wherein the leading edge comprises a surface with a hardness of at least 58 HRc.

8. The pick of claim 7 , wherein the surface comprises a material selected from the group consisting of chromium, tungsten, tantalum, niobium, titanium, molybdenum, carbide, natural diamond, polycrystalline diamond, vapor deposited diamond, cubic boron nitride, TiN, AlNi, AlTiNi, TiAlN, CrN/CrC/(Mo, W)S2, TiN/TiCN, AlTiN/MoS2, TiAlN, ZrN, diamond impregnated carbide, diamond impregnated matrix, silicon bonded diamond, and/or combinations thereof.

9. The pick of claim 1 , wherein a carbide ring is fixed to the leading edge.

10. The pick of claim 1 , wherein a superhard material, selected from the group consisting of diamond, cubic boron nitride, or combinations thereof, is bonded to the cemented metal carbide.

11. The pick of claim 10 , wherein the diamond is infiltrated diamond.