Method for producing a metallic substrate used for automobile exhaust gas purifying device
This patent describes a method for producing a metallic substrate used for an automobile exhaust gas purifying device, the metallic substrate having a length necessary for the use and substantially consisting of a honeycomb and an outer sleeve, both of which extend along the entire length of the metallic substrate. The method comprises the steps of: preparing a heat-resisting steel member having a length and capable of containing therein easy-soluble material members and stainless steel members extending along the entire length thereof; densely filling the heat-resisting steel member with the easy-soluble material members extending along the entire length of the heat-resisting steel member and with the stainless steel members for separating the easy-soluble material members from each other over the entire length thereof, to form a filled body; hot-working the filled body to reduce the cross sectional area thereof at a reduction ratio necessary for achieving a metallic bond between the stainless steel members; cutting the filled body to a predetermined length sufficient for the metallic substrate; and removing the easy-soluble material from the filled body by at least one of a chemical and an electrochemical treatment for boring throughholes extending the entire length of the filled body to expose catalytic carrier-destined surfaces of the stainless steel.
- Assignee:
- NOV; NOV-88-006650; EDB-88-100751
- Patent Number(s):
- US 4726105
- OSTI ID:
- 5058989
- Resource Relation:
- Patent File Date: Filed date 10 Feb 1987
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
54 ENVIRONMENTAL SCIENCES
EXHAUST GASES
PURIFICATION
POLLUTION CONTROL EQUIPMENT
FABRICATION
STAINLESS STEELS
ADHESION
AIR POLLUTION CONTROL
CATALYSTS
HEAT RESISTING ALLOYS
HOT WORKING
SUBSTRATES
ALLOYS
CHROMIUM ALLOYS
CONTROL
CORROSION RESISTANT ALLOYS
EQUIPMENT
FLUIDS
GASEOUS WASTES
GASES
HEAT RESISTANT MATERIALS
IRON ALLOYS
IRON BASE ALLOYS
MATERIALS
MATERIALS WORKING
POLLUTION CONTROL
STEELS
WASTES
200202* - Fossil-Fueled Power Plants- Waste Management- Noxious Gas & Particulate Emissions
360101 - Metals & Alloys- Preparation & Fabrication
500200 - Environment
Atmospheric- Chemicals Monitoring & Transport- (-1989)