Method of cladding tubing and plate products
OwnerWilliam C. Turnerinventor
Life of this patent
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Abstract
A method of cladding a base plate of carbon steel, including the steps of plating by electroless deposition the faying surface of the plate slab, positioning a cladding plate on the plated faying surface, welding both plates together at three edges to form a seal, attaching a gas reservoir at the fourth side thus forming a sealed subassembly, evacuating the space formed in the subassembly between the two plates of water vapor and oxygen, heating the subassembly to about 1650.degree. to 2100.degree. F. thereby melting the bonding metal alloy, and hot rolling the heated subassembly to metallically bond the cladding plate to the steel plate by means of the mechanism of liquid interface diffusion bonding.
Claims17
A method of manufacturing a clad metal plate product employing an rectangular metal base plate having four edges and first and second opposed surfaces, comprising:
- (a) plating the first surface of the base plate with a low melting point bonding metal alloy;
- (b) positioning a rectangular metal cladding plate having four edges and a first and second opposed surface juxtaposed to said base plate, the cladding plate first surface being continguous to said low melting point bonding metal alloy plated on said base plate first surface;
- (c) welding three edges of said base plate to three corresponding edges of said cladding plate;
- (d) welding a gas bag to the fourth edges of said base plate and cladding plate to form a sealed subassembly;
- (e) evacuating the space between said base plate and said cladding plate first surfaces and charging it with inert gas by attachment of apparatus to said gas bag in a manner to substantially remove all water and oxygen and to leave the space filled with inert gas;
- and
- (f) heating the subassembly from about 1,650.degree. F. to 2,100.degree. F. and rolling the plates to force them into intimate contact with said bonding metal alloy therebetween.
A method of manufacturing a clad metal plate product employing a metal base plate having a faying surface and an opposed surface, a cladding plate having a faying surface and an opposed surface;
- comprising
- (a) plating one of the faying surfaces with a low melting point bonding metal alloy;
- (b) assemblying the base plate and cladding plate one against the other so that their faying surfaces are juxtaposed;
- (c) sequentially evacuating and filling the space between the faying surfaces with inert gas until the water and oxygen within said space is at a level below a dew point of about -60.degree. F.;
- (d) heating the assembled plates to the melting temperature of the bonding metal alloy;
- and
- (e) applying pressure between the assembled plates to bond the faying surfaces.
Dependencies are inferred from the claim text.