Low carbon steel and cemented carbide wear part
The present disclosure relates to a wear part having high wear resistance and strength and a method of making the same. The wear part is composed of a compound body of cemented carbide particles cast with a low-carbon steel alloy. The low-carbon steel alloy has a carbon content corresponding to a carbon equivalent Ceq=wt % C+0.3(wt % Si+wt % P) of about 0.1 to about 1.5 weight %. The wear part could include a body with a plurality of inserts of cemented carbide particles cast into a low-carbon steel alloy disposed in the body. Each of the plurality of cemented carbide inserts are coated with at least one layer of oxidation protection/chemical resistant material. The plurality of inserts are directly fixed onto a mold corresponding to the shape of the wear part. The cemented carbide inserts are then encapsulated with the molten low-carbon steel alloy to cast the cemented carbide inserts with the low-carbon steel alloy.
1. A wear part having high wear resistance and strength, comprising:
a body composed of cemented carbide particles cast with a low-carbon steel alloy,
wherein at least one oxidation protection alumina coating is disposed on the cemented carbide particles, and
wherein said low-carbon steel alloy has a carbon content corresponding to a carbon equivalent Ceq=wt % C+0.3(wt % Si+wt % P) of about 0.1 weight percent to about 1.5 weight percent.
2. The wear part according to claim 1 , wherein the cemented carbide particles of the body are encapsulated by the low-carbon steel during casting to form a matrix.
3. The wear part according to claim 2 , wherein the cemented carbide particles have a granular size that is directly proportional to heat capacity and thermal conductivity such that a larger granular size of cemented carbide provides a higher heat capacity and a higher thermal conductivity, while a smaller granular size cemented carbide provides a lower heat capacity and heat conductivity.
4. The wear part according to claim 1 , wherein the volume of individual cemented carbide particles in the wear part is about 0.3 cm 3 to about 20 cm 3 .
5. The wear part according to claim 1 , wherein said at least one oxidation protection alumina coating is from about 1 micron to about 5 micron thick.
6. The wear part according to claim 1 , wherein the cemented carbide particles have an alumina coating thickness of about 5 μm to about 8 μm.
7. The wear part according to claim 1 , further comprising a plurality of layers of alumina oxidation protection coating on the cemented carbide particles.
8. The wear part according to claim 1 , wherein the cemented carbide particles have a binder phase content of Ni.
9. The wear part according to claim 1 , further comprising a pre-layer of TiN coated on the cemented carbide particles underneath the alumina coating.
10. The wear part according to claim 1 , wherein the cemented carbide particles are exposed at a surface of the wear part.
11. The wear part according to claim 1 , wherein the wear part has a thickness of about 5 mm to about 15 mm.
12. A wear part having high wear resistance and strength, comprising:
a body composed of cemented carbide particles cast with a low-carbon steel alloy,
wherein at least one oxidation protection Al 2 O 3 alumina coating is disposed on the cemented carbide particles, and
wherein said low-carbon steel alloy has a carbon content corresponding to a carbon equivalent Ceq=wt % C+0.3(wt % Si+wt % P) of about 0.1 weight percent to about 1.5 weight percent.
13. The wear part according to claim 12 , characterized in that the cemented carbide particles of the body are encapsulated by the low-carbon steel during casting to form a matrix.
14. The wear part according to claim 12 , characterized in that the cemented carbide particles have a granular size that is directly proportional to heat capacity and thermal conductivity such that a larger granular size of cemented carbide provides a higher heat capacity and a higher thermal conductivity, while a smaller granular size cemented carbide provides a lower heat capacity and heat conductivity.
15. The wear part according to claim 12 , characterized in that the volume of cemented carbide particles in the wear part ranges from about 0.3 cm 3 to about 20 cm 3 .
16. The wear part according to claim 12 , further comprising a plurality of layers of oxidation protection Al 2 O 3 alumina coating disposed on the cemented carbide particles.
17. The wear part according to claim 12 , characterized in that the cemented carbide particles have a binder phase content of Ni.
18. The wear part according to claim 12 , further comprising a pre-layer of TiN coated on the cemented carbide particles located underneath the alumina oxidation protection coating.
19. The wear part according to claim 12 , characterized in that the cemented carbide particles are exposed at a surface of the wear part.
20. A wear part having high wear resistance and strength, comprising:
a body composed of cemented carbide particles cast with a low-carbon steel alloy,
wherein at least one oxidation protection alumina coating of a thickness of from 1 μm to about 8 μm is disposed on the cemented carbide particles, and
wherein said low-carbon steel alloy has a carbon content corresponding to a carbon equivalent Ceq=wt % C+0.3(wt % Si+wt % P) of about 0.1 weight percent to about 1.5 weight percent.
21. The wear part according to claim 20 , characterized in that the cemented carbide particles of the body are encapsulated by the low-carbon steel during casting to form a matrix.
22. The wear part according to claim 20 , characterized in that the cemented carbide particles have a granular size that is directly proportional to heat capacity and thermal conductivity such that a larger granular size of cemented carbide provides a higher heat capacity and a higher thermal conductivity, while a smaller granular size cemented carbide provides a lower heat capacity and heat conductivity.
23. The wear part according to claim 20 , characterized in that the volume of cemented carbide particles in the wear part ranges from about 0.3 cm 3 to about 20 cm 3 .
24. The wear part according to claim 20 , further comprising a plurality of layers of oxidation protection alumina coating disposed on the cemented carbide particles.
25. The wear part according to claim 20 , characterized in that the cemented carbide particles have a binder phase content of Ni.