Wear resistant components

• US 20100275473A1
• Filed: 07/02/2010
• Published: 11/04/2010
• Est. Priority Date: 01/04/2008
• Status: Abandoned Application

• Current Assignee: Excalibur Steel Company Pty., Ltd.
• Original Assignee: Excalibur Steel Company Pty., Ltd.
• Inventors: Maher, Patrick
• Application Number:
  US12/803,716
• Publication Number:
  US 20100275473A1
• Time in Patent Office: Days
• US Class Current: 37/453
• CPC Class Codes: B32B 15/011 all layers being formed of iron alloys or steels
• CPC Class Codes: C22C 37/08 with nickel
• CPC Class Codes: C22C 37/10 containing aluminium or silicon
• CPC Class Codes: E02F 9/285 characterised by the material used
• CPC Class Codes: E02F 9/2883 Wear elements for buckets or implements in general
• CPC Class Codes: Y10T 428/12389 having variation in thickness
• CPC Class Codes: Y10T 428/12951 Fe-base component
• CPC Class Codes: Y10T 428/12986 Adjacent functionally defined components

Abstract

A wear component for ground engaging machinery is disclosed. The wear component has a shell formed from a first metallic material and an inner body formed from a second metallic material. The first material is relatively tough, and resistant to impact forces, and the second material is relatively abrasion resistant. A metallurgical bond exists between the first material and the second material.

Claims

1. A component formed from at least a first metallic material and a second metallic material, the first material having a toughness greater than that of the second material and the second material being more abrasion resistant than the first material;

wherein the component has an shell formed from the first material and an inner body formed from the second material; and

whereby a metallurgical bond exists between the first material and the second material.

2. A component as claimed in claim 1, wherein the component has an outer wear face, the wear face having a perimeter formed by the first material and a central region formed by the second material.

3. A component as claimed in claim 2, wherein the shell has a thicker portion at the wear face perimeter.

4. A component as claimed in claim 1, wherein the first metallic material is one which can be readily welded.

5. A component as claimed in claim 1, wherein the first metallic material has a Charpy impact energy of above 4 OJ, measured in a V-notch test at 200 C.

6. A component as claimed in claim 1, wherein the second metallic material has a hardness greater than 300 HB.

7. A component as claimed in claim 6, wherein the second metallic material is an alloyed white iron.

8. A component as claimed in claim 7, wherein the second metallic material includes 9-15% chromium.

9. A component as claimed in claim 7, wherein the second metallic material includes 3.5-4.5% carbon;

10. A component as claimed in claim 7, wherein the second metallic material includes 0.4-0.7% silicon.

11. A component as claimed in claim 7, wherein the second metallic material includes 1.0-4.0% manganese.

12. A component as claimed in claim 7, wherein the second metallic material includes 0.5-3.0% nickel.

13. A component as claimed in claim 1, wherein the shell includes a base opposed to the outer wear face, the base being shaped for ready attachment to ground engaging machinery

14. A wear bar for ground engaging machinery, formed from at least a first metallic material and a second metallic material, the first material having a toughness greater than that of the second material and the second material being more abrasion resistant than the first material;

wherein the wear bar has a shell formed from the first material and an inner body formed from the second material; and

whereby a metallurgical bond exists between the first material and the second material.

15. A wear bar as claimed in claim 14, wherein the wear bar is elongate, having a transverse cross-sectional profile which is substantially constant along at least a portion of the bar.

16. A wear bar as claimed in claim 14, wherein the shell includes a base which is arranged for attachment to the machinery, and side walls which extend from the base.

17. A wear bar as claimed in claim 16, wherein the side walls are inwardly tapered with respect to each other towards an outer wear face.

18. A wear bar as claimed in claim 16, wherein the side walls are thicker at their upper edge than adjacent the shell base.

19. A wear bar as claimed in claim 14, wherein the shell includes an elongate recess which can locate, in use about a curved portion of the ground engaging machinery.

26. A wear bar as claimed in claim 14, wherein the wear bar has an outer wear face, the wear face having a perimeter formed by the first material and a central region formed by the second material;

27. A wear bar as claimed in claim 26, wherein the shell has a thicker portion at the wear face perimeter;

28. A wear bar as claimed in claim 14, wherein the first metallic material is one which can be readily wielded;

29. A wear bar as claimed in claim 14, wherein the first metallic material has a Charpy impact energy of above 40 J, measured in a V-notch test at 200 C;

30. A wear bar as claimed in claim 14, wherein the second metallic material has hardness greater than 300 HB;

31. A wear bar as claimed in claim 30, wherein the second metallic material is an alloyed white iron;

32. A wear bar as claimed in claim 31, wherein the second metallic material includes 9-15% chromium;

33. A wear bar as claimed in claim 31, wherein the second metallic material includes 3.5-4.5% carbon;

34. A wear bar as claimed in claim 31, wherein the second metallic material includes 0.4-0.7% silicon;

35. A wear bar as claimed in claim 31, wherein the second metallic material includes 1.0-4.0% manganese;

36. A wear bar as claimed in claim 31, wherein the second metallic material includes 0.5-3.0% nickel;

37. A wear bar as claimed in claim 14, wherein the shell includes a base opposed to the outer wear face, the base being shaped for ready attachment to ground engaging machinery;

20. A heel shroud for an excavator bucket, formed from at least a first metallic material and a second metallic material, the first material having a toughness greater than that of the second material and the second material being more abrasion resistant than the first material;

wherein the heel shroud has a shell formed from the first material and an inner body formed from the second material; and

whereby a metallurgical bond exists between the first material and the second material.

21. A heel shroud as claimed in claim 20, wherein the shell has a base formed from an L-shaped first wall and a second wall extending from an edge of the first wall to create a ‘

V shape which opens towards the wear face.

22. A heel shroud as claimed in claim 21, wherein substantially triangular first side walls extend between the first wall and the second wall, defining a substantially triangular prismatic portion of the inner body.

23. A heel shroud as claimed in claim 20, wherein side walls extend about the base to define a substantially rectangular wear face perimeter.

24. A heel shroud as claimed in claim 20, wherein the base includes a recess arranged to locate against an excavator bucket.

38. A heel shroud as claimed in claim 20, wherein the heel shroud has an outer wear face, the wear face having a perimeter formed by the first material and a central region formed by the second material;

2

39. A heel shroud as claimed in claim 38, wherein the shell has a thicker portion at the wear face perimeter;

40. A heel shroud as claimed in claim 20, wherein the first metallic material is one which can be readily wielded;

41. A heel shroud as claimed in claim 20, wherein the first metallic material has a Charpy impact energy of above 40 J, measured in a V-notch test at 200 C;

42. A heel shroud as claimed in claim 20, wherein the second metallic material has a hardness greater than 300 HB;

43. A heel shroud as claimed in claim 42, wherein the second metallic material is an alloyed white iron;

44. A heel shroud as claimed in claim 43, wherein the second metallic material includes 9-15% chromium;

45. A heel shroud as claimed in claim 43, wherein the second metallic material includes 3.5-4.5% carbon;

46. A heel shroud as claimed in claim 43, wherein the second metallic material includes 0.4-0.7% silicon;

47. A heel shroud as claimed in claim 43, wherein the second metallic material includes 1.0-4.0% manganese;

48. A heel shroud as claimed in claim 43, wherein the second metallic material includes 0.5-3.0% nickel;

49. A heel shroud as claimed in claim 20, wherein the shell includes a base opposed to the outer wear face, the base being shaped for ready attachment to ground engaging machinery.

25. A tooth for ground engaging machinery, formed from at least a first metallic material and a second metallic material, the first material having a toughness greater than that of the second material and the second material being more abrasion resistant than the first material;

wherein the tooth has a shell formed form the first material and an inner body formed from the second material; and

whereby a metallurgical bond exists between the first material and the second material;