Direct bond of steel at low temperatures
AssigneeAgilent Technologies, Inc.
InventorPeisheng Sheng
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Abstract
The instant invention is directed to a bonded product, such as a manifold, for gas or liquid chromatographs, and a method for making the same. The bonded product is made using the following steps: (i) contacting two or more steel sheets; (ii) heating the contacted sheets to a temperature substantially below the melting temperature of the sheets; (iii) applying pressure to the contacted sheets; and (iv) cooling the contacted sheets. No intermediate foreign material is used to bond the steel sheets, e.g., no welding material or TLP diffusion bonding plate is utilized. Nonetheless, a strong, leak free bond is generated at temperatures as low as 1700° F. (926.6° C.). The bond is molecular in nature, as evidenced by grains that grow from one sheet to another across the interface between the two sheets.
Claims19
A bonded product manufactured in the following manner:
- (i) contacting two or more steel sheets;
- (ii) heating the contacted sheets to a temperature substantially below the melting temperature of both sheets;
- (iii) applying pressure to the contacted sheets;
- and
- (iv) cooling the contacted sheets,
- wherein an interface exists between the sheets, wherein no intermediate foreign bonding material is present between the sheets, and wherein grains from one sheet grow across the interface onto the other sheet.
A method for making a bonded product comprising the following steps:
- (i) contacting two or more steel sheets;
- (ii) heating the contacted sheets to a temperature substantially below the melting temperature of both sheets;
- (iii) applying pressure to the contacted sheets;
- and
- (iv) cooling the contacted sheets,
- wherein no intermediate foreign material is used to bond the sheets.
Dependencies are inferred from the claim text.