JP2009172620A - Method for producing palladium-containing clad sheet - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To more widely actualize the properties of a brazing filler metal layer in the method for producing a palladium-containing clad sheet. <P>SOLUTION: Disclosed is a method for producing a palladium-containing clad sheet in which a palladium-containing brazing filler metal layer X1 is formed at least on the face of either one side of a planar base material Y, and the method comprises: an arrangement stage where the palladium-containing powder X is arranged on the face of at least either side of the base material Y; and a heat treatment stage where the powder X arranged on the face of at least either side of the base material Y in the arrangement stage is subjected to heat treatment so as to form the brazing filler metal layer X1. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a method for producing a palladium-containing clad sheet in which a brazing material layer containing palladium is formed on a substrate.

Conventionally, a palladium-containing clad sheet in which a brazing material layer containing palladium is bonded to a plate-like base material is known.
In this palladium-containing clad sheet, the brazing material layer is melted by being heated to the brazing temperature in a state where the brazing material is in contact with the base material (member to be brazed), and then cooled. By doing so, the brazing material layer is solidified in a state of being fixed to the base material and the base material. For this reason, a base material and a base material can be brazed.

In the case of producing such a palladium-containing clad sheet, in the same manner as a general clad sheet production method, first, a sheet consisting only of a brazing material layer is formed, and the sheet consisting only of this brazing material layer is used as a base material. On the other hand, it is conceivable to produce a palladium-containing clad sheet by bonding by rolling.
Aluminum Brazing Handbook Editorial Committee, “Aluminum Brazing Handbook (Revised)”, Japan Light Metal Welding Structure Association, March 25, 2003, p. 80-83

  By the way, since the ductility of the sheet made of the brazing material layer is different from that of the base material, it is necessary to adjust the component ratio of the brazing material layer to make the ductility close to each other in order to bond them by rolling. .

  However, the properties of the brazing material layer are affected by the component ratio of the brazing material layer. For this reason, in the manufacturing method of the palladium containing clad sheet by the conventional rolling process, the property of a brazing material layer will be limited to the range of the conditions which can be bonded together by a rolling process.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to make it possible to realize a wider range of properties of a brazing material layer in a method for producing a palladium-containing clad sheet.

  In order to achieve the above object, the present invention provides a method for producing a palladium-containing clad sheet in which a brazing material layer containing palladium is formed on at least one surface of a plate-like substrate, the powder containing palladium Is disposed on at least one surface of the base material, and the brazing material layer is formed by heat-treating the powder disposed on the at least one surface of the base material in the placement step. And a heat treatment process.

  According to the method for producing a palladium-containing clad sheet of the present invention having such characteristics, in the arranging step, the powder containing palladium is arranged on at least one surface of the substrate, and in the heat treatment step, at least one side of the substrate By performing a heat treatment on the powder disposed on the surface, the powder layer made of the powder is used as a brazing material layer.

  Moreover, in this invention, the said arrangement | positioning process is a process of arrange | positioning the said powder on the at least one side surface of the said base material by crimping | bonding the said base material and the said powder between a pair of rolling rollers. adopt.

  Moreover, in this invention, the said heat processing process employ | adopts the structure that the process of melting or sintering by heating the said powder is employ | adopted.

  Moreover, in this invention, the said palladium is employ | adopted as the structure contained in the said powder as a pure metal powder or an alloy powder.

  Moreover, in this invention, the structure that the said powder contains a flux is employ | adopted.

  Moreover, in this invention, the structure of having the process of forming the flux content layer arrange | positioned on the surface on the opposite side to the said base material of the said brazing material layer or the said brazing material layer is employ | adopted.

According to the present invention, palladium-containing powder is disposed on at least one surface of the substrate, and the brazing material layer is formed by heat-treating the disposed powder. That is, according to the present invention, a clad sheet having a brazing material layer is manufactured without bonding a sheet composed of a brazing material layer and a base material by a rolling process. For this reason, the brazing material layer having an arbitrary component ratio can be easily formed by adjusting the component ratio of the powder.
Therefore, according to this invention, it becomes possible to implement | achieve the property of the brazing material layer in a palladium containing clad sheet more widely.

  Hereinafter, an embodiment of a method for producing a palladium-containing clad sheet according to the present invention will be described with reference to the drawings. In the following drawings, the scale of each member is appropriately changed in order to make each member a recognizable size.

(First embodiment)
FIG. 1 is a schematic configuration diagram of a manufacturing apparatus D1 that performs the manufacturing method of the palladium-containing clad sheet of the present embodiment.
As shown in this figure, the manufacturing apparatus D1 includes a hopper 1, a belt feeder 2, a rolling roller 3, a pulley 4, a heating furnace 5, and a collection roller 6.

  The hopper 1 is configured to receive a palladium-containing powder X that is a powder containing palladium and to supply the palladium-containing powder X to the belt feeder 2.

  The belt feeder 2 conveys the palladium-containing powder X and drops the palladium-containing powder X downward from above the rolling roller 3, whereby the palladium-containing powder is applied to the peripheral surface of the rolling roller 3 (the peripheral surface of the rolling roller 3 </ b> A described later). X is supplied.

The rolling roller 3 includes a pair of rolling rollers 3A and a rolling roller 3B. The rolling roller 3 </ b> A is arranged so as to be positioned below the belt feeder 2. The rolling roller 3 is rotationally driven by a rotation driving mechanism (not shown), whereby the palladium-containing powder X supplied via the belt feeder 2 and the plate-like substrate Y inserted from above are rolled into the rolling roller 3A. And the rolling roller 3B.
The rolling roller 3 presses the base Y and the palladium-containing powder X between the rolling rollers 3A and 3B, thereby forming a powder layer made of the palladium-containing powder X on one surface of the base Y.

  The pulley 4 is disposed below the rolling roller 3, and is configured to guide the substrate Y in which the palladium-containing powder X is pressure-bonded to the one surface by the rolling roller 3 in the horizontal direction.

  The heating furnace 5 melts or sinters the palladium-containing powder X by heating the palladium-containing powder X disposed on one surface to the vicinity of the melting point of the palladium-containing powder X together with the base material Y. As a result, the powder layer (the layer made of palladium-containing powder X) on one surface of the substrate Y is melted or sintered, and then cooled to form the brazing material layer X1.

  The collection roller 6 collects the base material Y (that is, the clad sheet) discharged from the heating furnace 5 by winding it.

The palladium-containing powder X is a powder containing at least palladium. Palladium may be contained in the palladium-containing powder X as a pure metal powder, or may be contained in the palladium-containing powder X as an alloy powder.
The component ratio in the palladium-containing powder X is set so that the brazing material layer of the palladium-containing clad sheet produced by the method for producing a palladium-containing clad sheet of the present embodiment exhibits desired performance.
The palladium-containing powder X contains, for example, silver, copper, manganese, nickel, cobalt, or gallium as a component in addition to palladium, and becomes a brazing material composition by melting or sintering. Or it has the brazing material composition itself.

The material for forming the base material Y includes low carbon steel, low alloy steel, tool steel, stainless steel, Kovar, nickel or an alloy thereof, nickel-cobalt alloy or a heat resistant alloy thereof, copper or an alloy thereof, aluminum or an alloy thereof. , Titanium or its alloy, titanium-aluminum alloy, magnesium or its alloy, beryllium or its alloy, zirconium or its alloy, vanadium or its alloy, tungsten or its alloy, molybdenum or its alloy, tantalum or its alloy, niobium or its alloy And cemented carbide.
Among these, the base material on which the brazing material layer containing palladium is formed is formed of low carbon steel, low alloy steel, tool steel, Kovar, nickel-cobalt alloy or its heat-resistant alloy, copper or its alloy. It is more preferable.
In addition, when the palladium containing powder X consists of a palladium-cobalt alloy, it is especially preferable that the base material Y is formed from a nickel-cobalt alloy or a heat-resistant alloy thereof.
On the other hand, when the palladium-containing powder X is made of a silver-palladium-gallium alloy, the substrate Y is preferably made of titanium or an alloy thereof.

  Next, the manufacturing method of the palladium containing clad sheet of this embodiment which is operation | movement of the manufacturing apparatus D1 comprised as mentioned above is demonstrated.

First, the manufacturing apparatus D1 supplies the palladium-containing powder X accommodated in the hopper 1 to the peripheral surface of the rolling roller 3A by the belt feeder 2.
The palladium-containing powder X supplied to the peripheral surface of the rolling roller 3A is supplied between the rolling rollers 3A and 3B by the rotational driving of the rolling roller 3A, and is inserted between the rolling rollers 3A and 3B from above to below. The plate-shaped base material Y to be conveyed is arranged by being crimped to one surface (arrangement step).

  The base material Y to which the palladium-containing powder X has been pressure bonded is inserted into the heating furnace 5 positioned below the rolling rollers 3A and 3B via the pulley 4 and heated to a temperature near the melting point of the palladium-containing powder X. As a result, the powder layer made of the palladium-containing powder X is sintered or melted to form a layer, which is firmly fixed to the surface of the substrate Y, thereby forming a brazing material layer (heat treatment step).

  Then, the base material Y (that is, the palladium-containing clad sheet) on which the brazing material layer is formed is recovered by being wound up by the recovery roller 6.

  Through the above steps, a palladium-containing clad sheet S1 in which a brazing material layer X1 containing palladium is formed on one surface of the substrate Y as shown in FIG. 2 is manufactured.

According to the method for producing a palladium-containing clad sheet of this embodiment, the palladium-containing powder X, which is a powder containing palladium, is arranged on at least one surface of the substrate Y, and the arranged palladium-containing powder X The brazing material layer is formed by heat-treating. That is, according to the method for producing a palladium-containing clad sheet of the present embodiment, a clad sheet having a brazing material layer is produced without bonding the sheet made of the brazing material layer and the base material by rolling. For this reason, by adjusting the component ratio of the palladium-containing powder X, the brazing material layer X1 having an arbitrary component ratio can be easily formed.
Therefore, according to the method for producing a palladium-containing clad sheet of this embodiment, it is possible to realize a wider range of properties of the brazing material layer in the palladium-containing clad sheet.

(Second Embodiment)
Next, a second embodiment of the present invention will be described. In the description of the second embodiment, the description of the same parts as in the first embodiment will be omitted or simplified.

FIG. 3 is a schematic configuration diagram of a production apparatus D2 that performs the production method of the palladium-containing clad sheet of the present embodiment.
As shown in this figure, the manufacturing apparatus D2 includes a first rolling processing apparatus D2A, a second rolling processing apparatus D2B, and a collection roller 6.

The 1st rolling processing apparatus D2A is provided with the hopper 1, the belt feeder 2, the rolling roller 3, and the heating furnace 5 with which the manufacturing apparatus D1 of the said 1st Embodiment is provided.
The second rolling processing apparatus D2B includes a hopper 11, a belt feeder 12, a rolling roller 13, a pulley 14, and a heating furnace 15.

  The hopper 11 is configured to receive the flux-containing powder Z including the flux powder and supply the flux-containing powder Z to the belt feeder 12.

  The belt feeder 12 conveys the flux-containing powder Z and causes the flux-containing powder Z to drop downward from above the rolling roller 13 so that the flux-containing powder is applied to the peripheral surface of the rolling roller 13 (the peripheral surface of the rolling roller 13A described later). Z is supplied.

The rolling roller 13 includes a pair of rolling rollers 13A and a rolling roller 13B. The rolling roller 13 </ b> A is arranged so as to be positioned below the belt feeder 12. The rolling roller 13 is rotationally driven by a rotational drive mechanism (not shown), whereby a base material Y on which a flux-containing powder Z supplied via the belt feeder 12 and a brazing material layer X1 inserted from above is formed. Are rolled between the rolling roller 13A and the rolling roller 13B.
The rolling roller 13 presses the flux-containing powder Z on the brazing material layer X1 between the rolling rollers 13A and 13B, thereby forming a powder layer made of the flux-containing powder Z on one side of the substrate Y.

The pulley 14 is disposed below the rolling roller 13, and is configured to guide the base material Y on which the flux-containing powder Z is pressure-bonded to one side by the rolling roller 13 in the horizontal direction.
The heating furnace 15 heat-treats the flux-containing powder Z disposed on one side together with the base material Y at a temperature equal to or lower than the melting point of the flux-containing powder Z.

  The flux powder is selected according to the use environment of the palladium-containing clad sheet produced by the method for producing the palladium-containing clad sheet of the present embodiment (base material forming material, brazing temperature, etc.). Chloride such as lithium chloride, potassium chloride, sodium chloride, zinc chloride, magnesium chloride, fluoride such as sodium fluoride, aluminum fluoride, potassium fluoride, lithium fluoride, potassium hydrogen fluoride, boric acid, sodium borate Borates such as potassium borate and lithium borate, borofluorides such as sodium borofluoride and potassium borofluoride, borax and the like can be used. For the palladium-containing clad sheet, it is particularly preferable to use boric acid, potassium borate or borax as the flux powder in consideration of the brazing temperature of the palladium-containing clad sheet.

  Next, the manufacturing method of the palladium containing clad sheet of this embodiment which is operation | movement of the manufacturing apparatus D2 comprised as mentioned above is demonstrated.

  First, in the manufacturing apparatus D2, the brazing material layer X1 containing palladium is formed on one surface of the base material Y by the first rolling processing apparatus D2A, as in the manufacturing method of the palladium-containing clad sheet of the first embodiment. Is done.

Subsequently, in the second rolling processing apparatus D2B, the flux-containing powder Z accommodated in the hopper 11 is supplied to the peripheral surface of the rolling roller 13A by the belt feeder 12.
The flux-containing powder Z supplied to the peripheral surface of the rolling roller 13A is supplied between the rolling rollers 13A and 13B and is inserted between the rolling rollers 13A and 13B from above to below by the rotational driving of the rolling roller 13A. It arrange | positions on the brazing material layer X1 conveyed.
Then, the base material Y to which the flux-containing powder Z is pressure-bonded is inserted into the heating furnace 15 positioned below the rolling rollers 13A and 13B via the pulley 14 and heated at a temperature equal to or lower than the melting point of the flux-containing powder Z. . As a result, the powder layer made of the flux-containing powder Z is sintered into a layer, and is firmly fixed to the surface of the brazing material layer X1, thereby forming the flux-containing layer Z1.

  Then, the base material Y (that is, the palladium-containing clad sheet) on which the brazing material layer X1 and the flux-containing layer Z1 are formed is recovered by being wound up by the recovery roller 6.

Through the above-described steps, a palladium-containing clad sheet S2 in which a brazing material layer X1 containing palladium and a flux-containing layer Z1 are formed on one surface of the substrate Y as shown in FIG. 4 is manufactured.
According to such a palladium-containing clad sheet S2, the flux contained in the flux-containing layer Z1 melts during brazing, and the oxide film formed on the surface of the base material or the brazing material layer X1 is removed. It is possible to perform good brazing.

  That is, according to the method for producing a palladium-containing clad sheet of the present embodiment, it is possible to produce a palladium-containing clad sheet that can realize good brazing.

  As mentioned above, although preferred embodiment of the manufacturing method of the palladium containing clad sheet concerning this invention was described referring an accompanying drawing, it cannot be overemphasized that this invention is not limited to the said embodiment. Various shapes, combinations, and the like of the constituent members shown in the above-described embodiments are examples, and various modifications can be made based on design requirements and the like without departing from the gist of the present invention.

For example, in the above-described embodiment, the configuration in which the brazing material layer X1 and the flux-containing layer Z1 are formed on one side of the base material Y has been described.
However, the present invention is not limited to this, and the brazing material layer X1 and further the flux-containing layer Z1 may be formed on both sides of the substrate Y.
In such a case, a hopper and a belt feeder may be installed on both sides in the conveyance direction of the substrate Y, and the palladium-containing powder X and further the flux-containing powder Z may be supplied to both sides of the substrate Y.

Moreover, in the said 2nd Embodiment, the structure which forms the flux content layer Z1 on the opposite side to the base material Y of the brazing material layer X1 was demonstrated.
However, the present invention is not limited to this, and the flux-containing layer Z1 may be formed between the brazing material layer X1 and the base material Y.
In such a case, what is necessary is just to arrange | position 1st rolling processing apparatus D2A and 2nd rolling processing apparatus D2B on the contrary.

Further, for example, in the first embodiment, a flux may be mixed with the palladium-containing powder X.
By adopting such a configuration, the brazing material layer X1 contains a flux, and a palladium-containing clad sheet that can be satisfactorily brazed.

  In addition, the materials other than palladium, the flux powder, and the base material forming material included in the palladium-containing powder X shown in the above embodiment are merely examples, and are not limited to the above-described examples. It is appropriately selected according to the usage environment.

Moreover, in the said embodiment, the structure arrange | positioned by crimping | bonding the palladium containing powder X or the flux containing powder Z with a pair of rolling roller was demonstrated.
However, the present invention is not limited to this, and the palladium-containing powder X or the flux-containing powder Z may be pressure-bonded by a configuration other than the rolling roller.
Furthermore, the palladium-containing powder X or the flux-containing powder Z may be disposed without being crimped.

It is the schematic of the manufacturing apparatus for performing the manufacturing method of the palladium containing clad sheet which is 1st Embodiment of this invention. It is a perspective view of the palladium containing clad sheet manufactured with the manufacturing method of the palladium containing clad sheet which is a 1st embodiment of the present invention. It is the schematic of the manufacturing apparatus for performing the manufacturing method of the palladium containing clad sheet which is 2nd Embodiment of this invention. It is a perspective view of the palladium containing clad sheet manufactured with the manufacturing method of the palladium containing clad sheet which is 2nd Embodiment of this invention.

Explanation of symbols

  D1, D2 ... Manufacturing equipment, S1, S2 ... Palladium-containing clad sheet, X ... Palladium-containing powder, X1 ... Brazing material layer, Y ... Base material, Z ... Flux-containing powder, Z1 ... Flux-containing Layer, 3, 13 ... Rolling roller

Claims (6)

A method for producing a palladium-containing clad sheet in which a brazing material layer containing palladium is formed on at least one surface of a plate-like substrate,
An arrangement step of arranging the powder containing palladium on at least one surface of the substrate;
A heat-treating step of heat-treating the powder disposed on at least one surface of the base material in the disposing step to form the brazing material layer. Method.   The said arrangement | positioning process is a process of arrange | positioning the said powder on the surface of the at least one side of the said base material by crimping | bonding the said base material and the said powder between a pair of rolling rollers. A method for producing a palladium-containing clad sheet.   The method for producing a palladium-containing clad sheet according to claim 1 or 2, wherein the heat treatment step includes a step of melting or sintering the powder by heating.   The said palladium is contained in the said powder as a pure metal powder or an alloy powder, The manufacturing method of the palladium containing clad sheet in any one of Claims 1-3 characterized by the above-mentioned.   The said powder contains a flux, The manufacturing method of the palladium containing clad sheet in any one of Claims 1-4 characterized by the above-mentioned. 5. The method according to claim 1, further comprising a step of forming a flux-containing layer disposed between the base material and the brazing material layer or on the surface of the brazing material layer opposite to the base material. Of producing a palladium-containing clad sheet.

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