Abstract: The powder-rolling device (1) includes: a pair of rolling rolls (2) to attach powder material (Y) to a sheet-shaped base material (X) by pressure; a preliminary press roll (8) to press the powder material (Y) to a circumferential surface of a rolling roll (2) before the powder material (Y) is attached to the base material (X) by pressure; and a support device (10) supporting the preliminary press roll (8) movable, so that a load applied to the preliminary press roll (8) becomes equal to a set value which has been set beforehand.

Abstract: The powder-rolling device (1) includes: a pair of rolling rolls (2) to attach powder material (Y) to a sheet-shaped base material (X) by pressure; a preliminary press roll (8) to press the powder material (Y) to a circumferential surface of a rolling roll (2) before the powder material (Y) is attached to the base material (X) by pressure; and a support device (10) supporting the preliminary press roll (8) movable, so that a load applied to the preliminary press roll (8) becomes equal to a set value which has been set beforehand.

Abstract: Provided are a method for producing a clad material, and a clad material which can prevent a brazing filler metal layer from having a higher melting point so as to prevent the strength degradation and thermal deformation of a metal material, which can reduce production costs, which can reduce in thickness the layer to prevent sagging of the brazing filler metal upon brazing and which can improve press formability. A powder press-fixing machine is used to press-fix metal powder to surfaces of a base material uncoiled from a coil by an uncoiler. In order to provide a required composition of brazing filler metal, at least two kinds of metal powder is mixed, the mixed powder being press-fixed to the base material to form the brazing filler metal layer, the brazing filler metal constituting the layer having the composition such that copper is added with at least phosphor to lower a melting point of the same relative to that of copper, thus producing the clad material.

Abstract: A method of producing a clad sheet formed by joining a clad layer at least containing nickel, chromium, silicon, and phosphorus to a base material made of a stainless steel or a nickel-based alloy. A step of forming the clad layer includes contact-bonding a mixed powder to the base material, wherein an alloy powder that contains at least one selected from chromium, silicon, and phosphorus as components, and a nickel powder that functions as a binder to have the alloy powder be contact bonded to the base material are mixed in the mixed powder.

Abstract: A method of producing a clad sheet formed by joining a clad layer at least containing nickel, chromium, silicon, and phosphorus to a base material made of a stainless steel or a nickel-based alloy. A step of forming the clad layer includes contact-bonding a mixed powder to the base material, wherein an alloy powder that contains at least one selected from chromium, silicon, and phosphorus as components, and a nickel powder that functions as a binder to have the alloy powder be contact bonded to the base material are mixed in the mixed powder.

Abstract: The present invention relates to a heat exchanger including a partitioning plate and flow channels of at least two systems which are partitioned by the partitioning plate, in which the partitioning plate is made of a clad sheet having a base material made of stainless steel or a nickel-based alloy, and a clad layer having brazing properties and corrosion resistance to a corrosive fluid, an entire surface of the base material which is exposed to the flow channel of at least one system being coated by the clad layer. According to the present invention, the heat exchanger, in which the corrosive fluid flows, can be reduced in size, and the performance thereof can be enhanced. Furthermore, it is possible to simplify the manufacturing process of the heat exchanger.

Abstract: Provided are a method for producing a clad material, and a clad material which can prevent a brazing filler metal layer from having a higher melting point so as to prevent the strength degradation and thermal deformation of a metal material, which can reduce production costs, which can reduce in thickness the layer to prevent sagging of the brazing filler metal upon brazing and which can improve press formability. A powder press-fixing machine 12 is used to press-fix metal powder to surfaces of a base material 1 uncoiled from a coil 2 by an uncoiler 3. In order to provide a required composition of brazing filler metal, at least two kinds of metal powder is mixed, the mixed powder being press-fixed to the base material 1 to form the brazing filler metal layer 11, the brazing filler metal constituting the layer 11 having the composition such that copper is added with at least phosphor to lower a melting point of the same relative to that of copper, thus producing the clad material 8.

Abstract: In order to provide a brazing sheet having excellent workability, a powder of a brazing filler metal composition is obtained from a single type of powder or by mixing two or more powders to form the brazing filler metal composition. By powder roll compaction of the powder, the powder is formed into a sheet shape.

Abstract: In order to provide a brazing sheet having excellent workability, a powder of a brazing filler metal composition is obtained from a single type of powder or by mixing two or more powders to form the brazing filler metal composition. By powder roll compaction of the powder, the powder is formed into a sheet shape.

Abstract: A carbon powder inlet and a graphite powder collecting are oppositely arrange on a furnace body. At least a pair of electrodes are oppositely arranged in the furnace body with respect to a graphitizing area at an intermediate position between the inlet and the collecting port and are engaged with different timing.