Iron-based sintered powder metal for wear resistant applications

Inventors: Denis Boyd Christopherson, Jr. (Waupun, WI); Leslie John Farthing (Rugby, GB); Jeremy Raymond Koth (Sun Prairie, WI)

Assignee: Federal-Mogul Corporation

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Quick Facts

Patent No.: US 8,801,828
App. No.: 13/566,432
Granted: Aug 12, 2014
Kind: B2

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Abstract

A powder metal material comprises pre-alloyed iron-based powder including carbon present in an amount of 0.25 to 1.50% by weight of the pre-alloyed iron-based powder. Graphite is admixed in an amount of 0.25 to 1.50% by weight of the powder metal material. The admixed graphite includes particles finer than 200 mesh in an amount greater than 90.0% by weight of the admixed graphite. Molybdenum disulfide is admixed in an amount of 0.1 to 4.0% by weight of the powder metal material, copper is admixed in an amount of 1.0 to 5.0% by weight of the powder metal material, and the material is free of phosphorous. The powder metal material is then compacted and sintered at a temperature of 1030 to 1150° C. At least 50% of the admixed graphite of the starting powder metal material remains as free graphite after sintering.

Claims (16)

1. A powder metal material comprising:

pre-alloyed iron-based powder including carbon in an amount of about 0.25% by weight to about 1.50% by weight of said pre-alloyed iron-based powder;

said pre-alloyed iron-based powder optionally including molybdenum, nickel, chromium, and manganese each in an amount up to about 3.0% by weight of said pre-alloyed iron-based powder;

said pre-alloyed iron-based powder including a pearlitic structure;

admixed graphite in an amount of about 0.25% by weight to about 1.50% by weight of said powder metal material, wherein said admixed graphite consists of particles having a U.S. standard sieve designation finer than 200 mesh present in an amount greater than about 90.0% by weight of said admixed graphite;

admixed molybdenum disulfide present in an amount of about 0.1% by weight to about 4.0% by weight of said powder metal material;

admixed copper present in an amount of about 1.0% by weight to about 5.0% by weight of said powder metal material; and

said powder metal material being free of phosphorous.

2. A sintered powder metal article comprising:

pre-alloyed iron-based powder including carbon in an amount of about 0.25% by weight to about 1.50% by weight of said pre-alloyed iron-based powder;

said pre-alloyed iron-based powder optionally including molybdenum nickel chromium and manganese each in an amount up to about 3.0% by weight of said pre-alloyed iron-based powder;

said pre-alloyed iron-based powder including a pearlitic structure;

admixed free graphite in an amount of about 0.05% by weight to about 1.50% by weight of said sintered powder metal article, wherein said admixed free graphite consists of particles having a U.S. standard sieve designation finer than 200 mesh;

intentionally added admixed molybdenum disulfide present in an amount of less than about 4.0% by weight of said sintered powder metal article;

intentionally added admixed copper present in an amount of less than about 5.0% by weight of said sintered powder metal article; and

said sintered powder metal article being free of phosphorous.

Assignments (20)

ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Aug 20, 2025

From: TENNECO INC.

To: FEDERAL-MOGUL POWERTRAIN LLC

Reel/Frame 072553/0043 →

MERGER Recorded Oct 25, 2023

From: FEDERAL-MOGUL LLC (DELAWARE)

To: TENNECO INC

Reel/Frame 065337/0273 →

PATENT SECURITY AGREEMENT (ABL) Recorded Apr 7, 2023

From: TENNECO INC.; DRIV AUTOMOTIVE INC.; FEDERAL-MOGUL CHASSIS LLC; FEDERAL-MOGUL IGNITION LLC; FEDERAL-MOGUL MOTORPARTS LLC; FEDERAL-MOGUL POWERTRAIN LLC; FEDERAL-MOGUL WORLD WIDE LLC; TENNECO AUTOMOTIVE OPERATING COMPANY INC.; THE PULLMAN COMPANY

To: CITIBANK, N.A., AS COLLATERAL AGENT

Reel/Frame 063268/0506 →

NOTICE OF GRANT OF SECURITY INTEREST IN PATENTS (FIRST LIEN) Recorded Nov 22, 2022

From: DRIV AUTOMOTIVE INC.; FEDERAL-MOGUL CHASSIS LLC; FEDERAL-MOGUL IGNITION LLC; FEDERAL-MOGUL MOTORPARTS LLC; FEDERAL-MOGUL POWERTRAIN LLC; FEDERAL-MOGUL WORLD WIDE LLC; TENNECO AUTOMOTIVE OPERATING COMPANY INC.; TENNECO INC.; THE PULLMAN COMPANY

To: CITIBANK, N.A., AS COLLATERAL AGENT

Reel/Frame 061989/0689 →

RELEASE OF SECURITY INTEREST Recorded Nov 19, 2022