Stock material or miscellaneous articles – All metal or with adjacent metals – Plural layers discontinuously bonded
Patent
1980-12-18
1983-07-12
Ramsey, Kenneth J.
Stock material or miscellaneous articles
All metal or with adjacent metals
Plural layers discontinuously bonded
228175, B32B 330
Patent
active
043931227
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
This invention relates to clad steel plates manufactured by cladding a plate of steel such as carbon steel, alloy steel or the like with an anticorrosive metal plate through a copper thin sheet and a stainless steel net.
BACKGROUND ART
Up to now, anticorrosive plates of metals such as titanium, tantalum, niobium, zirconium and the like having an excellent corrosion resistance have been widely used in various applications, including chemical instruments. Particularly, heavy-gauge anticorrosive metal plate is used in large-size instruments, vacuum instruments and the like.
However, this type of anticorrosive metal is very expensive, so that the instruments using heavy-gauge anticorrosive metal plate are restricted in their use range.
There has been proposed an attempt to reduce the material cost by using a clad steel plate consisting of a steel plate having a certain strength and an anticorrosive metal plate covered thereon, but it is difficult to sufficiently bond the anticorrosive metal plate to the steel plate by the usual method of welding. Therefore, there are often used explosive welded clad plates produced by cladding the anticorrosive metal plate on the steel plate by an explosive welding process using a powder. However, these explosive welded clad plates require a long time for the completion of production, owing to the presence of patent rights and other circumstances. Consequently, the delivery time becomes long. Other disadvantages of the explosive welding process are the facts that the working step is dangerous and the production cost is high, the applicable uses are limited.
DISCLOSURE OF INVENTION
It is an object of the invention to solve the above mentioned drawbacks of the prior art and to provide clad steel plates which are safe and simple in the working step, short in the delivery time and low in the production cost, and have a high peel strength as well as excellent electrical and heat conductivities.
According to the invention, there is provided a clad steel plate having a sandwich structure, obtained by sandwiching a thin copper sheet and a stainless steel net between a plate of steel such as carbon steel, alloy steel or the like and an anticorrosive plate of metal such as titanium, tantalum, niobium, zirconium or the like, wherein said steel plate and anticorrosive metal plate are bonded to each other through said thin sheet and net by local welding between mutual portions to be joined.
BRIEF EXPLANATION OF DRAWING
FIGS. 1(a).about.(d) are diagrammatic views showing each member of the clad steel plate according to an embodiment of the invention and the cladding state of these members, respectively; and
FIG. 2 is a perspective view of the clad steel plate produced by seam welding.
BEST MODE OF CARRYING OUT THE INVENTION
An embodiment of the invention will be described with reference to the accompanying drawing.
FIGS. 1(a).about.(d) are diagrammatic views showing each member of the clad steel plate according to the invention and the cladding state thereof, and FIG. 2 is a perspective view illustrating the clad steel plate produced by locally bonding the steel plate to the anticorrosive metal plate by means of seam welding. In the drawing, numeral 1 is a plate of steel such as low carbon steel, alloy steel or the like, numeral 2 a stainless steel net, numeral 3 a thin copper sheet, and numeral 4 an anticorrosive metal plate.
In the production of clad steel plates using such members, the anticorrosive metal plate 4 with a thickness of, for example, 0.1.about.1.0 mm as shown in FIG. 1(a), the thin copper sheet with a thickness of, for example, 0.1.about.0.5 mm, the stainless steel net 2 of 304 mesh made of SUS material as shown in FIG. 1(b) and the steel plate 1 with a thickness of, for example, 2.about.20 mm as shown in FIG. 1(c) are cut into the same shape, respectively, and then piled one upon the other so as to sandwich the stainless steel net 2 and the copper sheet 3 between the steel plate 1 and the anticorrosive metal plate 4, as shown in FIG. 1(d). In th
REFERENCES:
patent: 2438759 (1948-03-01), Liebowitz
patent: 2718690 (1955-09-01), Ulam
patent: 3001059 (1961-09-01), Jones
patent: 3672033 (1972-06-01), Richter
patent: 3787657 (1974-01-01), Denis et al.
patent: 4304821 (1981-12-01), Hayase et al.
Jordan M.
Ramsey Kenneth J.
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