Method of casting

Patent metadata

Field	Value
Publication number	US-9522425-B2
Application number	US-201514918291-A
Country	US
Kind code	B2
Filing date	Oct 20, 2015
Priority date	Apr 5, 2013
Publication date	Dec 20, 2016
Grant date	Dec 20, 2016

Abstract

A method of casting an article includes positioning a first portion of the article, formed from a first material, in a rotatable mold. Additionally, the method includes, while rotating the mold, pouring a molten second material into the mold over the first portion to form a second portion of the article that is metallurgically bonded to the first portion of the article.

First claim

What is claimed is:

1. A method of casting an article comprising, while rotating a mold about an axis:
pouring a molten first material into the mold to form a first portion of the article having a solid cross-section that is perpendicular to the axis, the solid cross-section having a non-circular, generally I-shaped outer edge;
allowing the first material to cool; and
pouring a molten second material into the mold over the first portion to form a second portion of the article that is metallurgically bonded to the first portion of the article.

2. The method of claim 1 , wherein:
the first material has a hardness of at least 45 Rockwell C; and
the second material has a carbon-equivalent (CE) value of less than 0.7.

3. The method of claim 2 , wherein:
the first material is steel or iron; and
the second material is steel.

4. The method of claim 1 , wherein the axis is generally parallel to a direction of gravitational acceleration.

5. The method of claim 1 , wherein the pourings occur at a plurality of different locations relative to the axis.

6. A method of casting an article comprising, while rotating a mold about an axis:
pouring a molten first material into the mold to form a first portion of the article having a cross-section that is perpendicular to the axis with a non-circular, generally I-shaped outer edge;
allowing the first material to cool; and
pouring a molten second material into the mold over the first portion to form a second portion of the article that is metallurgically bonded to the first portion of the article.

7. The method of claim 6 , wherein:
the first material has a hardness of at least 45 Rockwell C; and
the second material has a carbon-equivalent (CE) value of less than 0.7.

8. The method of claim 7 , wherein:
the first material is steel or iron; and
the second material is steel.

9. The method of claim 6 , wherein the axis is generally parallel to a direction of gravitational acceleration.

10. The method of claim 6 , wherein the pourings occur at a plurality of different locations relative to the axis.

Assignees

• Caterpillar Inc

Inventors

• Yaniak Thomas John
• Majewski Thomas

Classifications

• B22D19/00

  Casting in, on, or around objects which form part of the product (B22D23/04 takes precedence; alumino-thermic welding B23K23/00; coating by casting molten material on the substrate C23C6/00) · CPC title

• B22D13/04

  of shallow solid or hollow bodies, e.g. wheels or rings, in moulds rotating around their axis of symmetry · CPC title

• B60B2360/102

  Steel · CPC title

• B22D19/16 Primary

  for making compound objects cast of two or more different metals, e.g. for making rolls for rolling mills (casting compound ingots B22D7/02) · CPC title

• B22D19/04

  for joining parts · CPC title