New FeCrAl Alloys for Diesel Engine Catalytic Converters Engineered Materials Solutions, Incorporated

Format:

Conference/Event

Author/Creator:

Chen, L., author.

Conference Name:

SAE 2004 World Congress & Exhibition (2004-03-08 : Detroit, Michigan, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 2004

Summary:

This paper describes new FeCrAl alloys for metallic catalytic converter substrates used in heavy-duty diesel engines. The new alloys contain 1116 wt% Cr and 57 wt% Al without addition of Y, Hf or rare earth elements. The maximum services temperature of these alloys, by design, is 800°C. The new alloys were made by roll bonding and diffusion alloying. A thin layer of aluminum was bonded to both sides of a stainless steel strip to obtain a three layer Al/Stainless Steel/Al composite foil. The aluminum was then diffused into the stainless steel during a diffusion alloying process to form a FeCrAl alloy. Diffusion alloying can be achieved either in foil processing or during metallic substrate converter fabrication. The brazing process typically used for metallic substrate converters is well suited for in-situ diffusion alloying. Tests showed that the new alloys at the required foil thickness have room temperature mechanical properties similar to existing FeCrAl alloys, possess excellent semi-cyclic oxidation resistance at the maximum in-service temperature (800°C), and can be fabricated into honeycomb-like metallic catalytic converters using current manufacturing methods of corrugating, winding and brazing

Notes:

Vendor supplied data

Publisher Number:

2004-01-1491

Access Restriction:

Restricted for use by site license