JPS5925755B2 - Diamond-based laminated solid body and its manufacturing method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a diamond-based laminated solid body used as a cutting tool material and a method for producing the same.

The present invention provides a layered cutter material produced by sintering a layered stacked layer of a diamond-based mixed powder, a layered substrate material produced by sintering a layered stacked layer of stellite material powder, and a layered cutter material produced by sintering a layered stacked layer of a diamond-based mixed powder, The layered intermediate material produced by sintering the layered deposited layer of the mixture at the contact area between the layered deposited layer and the layered deposited layer of the stellite material powder, the layered intermediate material is piled up on the layered substrate material, and the layered intermediate material is The present invention relates to a diamond-based laminated solid body, which is a cutting tool material formed by stacking a layered cutter material on a layered intermediate material and sintering them integrally, and a method for producing the same.

The method for producing the diamond-based laminated solid body of the present invention includes:
Stellite material powder, which produces the substrate material in the diamond-based laminated compact, is deposited in a layer in a container, and on top of the deposited layer of stellite material powder, cobalt, nickel, and iron are added to the diamond powder that produces the cutter material. A diamond-based mixed powder to which one selected metal powder or a mixed powder of two or more metals is added is deposited in a layer, and a deposited layer of stellite material powder and a diamond-based powder are deposited in a layer to form a substrate material in the container. A container filled with a laminated layer of mixed powder is loaded into a high-temperature, high-pressure generation chamber, and the laminated layer in the container is sintered to satisfy the stable temperature and pressure conditions of diamond. The diamond-based laminated solid body manufactured by the method of the present invention is a method in which the sintering operation is performed by exposing the material to a temperature and a pressure for sintering. The layered substrate material produced by sintering the layers, the layered blade material produced by sintering the deposited layer of the diamond-based mixed powder, and the deposited layer of the snarite material powder and the deposited layer of the diamond-based mixed powder. The diamond-based mixed powder is deposited in three layers, including a layered intermediate material formed by sintering an intermediate deposited layer of a thin intermediate mixed powder in which the stellite material powder and the diamond-based mixed powder are mutually mixed at the contact area of the diamond-based mixed powder. This is a diamond-based laminated solid body constructed by continuously sintering a layer, a deposited layer of intermediate mixed powder, and a deposited layer of stellite material powder.

As mentioned above, the diamond-based laminated compact of the present invention combines diamond powder, which is an ultra-hard substance, with cobalt,
A layered blade material part that is produced by sintering a deposited layer of diamond-based mixed powder with the addition of one metal powder selected from nickel and iron or a mixed powder of two or more metals, and high hardness. a layered substrate material portion produced by sintering a deposited layer of powder of stellite material having high mechanical strength;
A layered intermediate material portion produced by sintering an intermediate deposited layer of an intermediate mixed powder of a diamond-based mixed powder and a stellite material powder at a contact portion between the deposited layer of the diamond-based mixed powder and the deposited layer of the stellite material powder; However, the layered intermediate material part is sandwiched between the layered blade material part and the layered base material part, and the three layers are successively sintered to form a sintered body, which has extremely high hardness. However, the layered blade material part is made of a sintered body of diamond-based mixed powder, which has poor toughness, and the layered intermediate material part is made of a sintered body of stellite powder, which has high hardness and mechanical strength. The object of the present invention is to provide a cutting tool material that can be firmly and strongly held as a medium layer and exhibit excellent cutting performance.

In addition, the method for manufacturing a diamond-based laminated solid body of the present invention involves depositing stellite material powder in a layered manner in a container for producing a sintered body, and adding cobalt, nickel, and diamond powder to the diamond powder on top of the deposited layer. A diamond-based mixed powder to which powder of one metal selected from iron or a mixed powder of two or more metals is added is deposited in layers, and in the container, the highest layer of stellite material powder is deposited. an intermediate deposited layer of intermediate mixed powder of stellite material powder and diamond-based mixed powder, which is generated at the contact portion between the layer and the deposited layer of diamond-based mixed powder placed on the deposited layer of skelite material powder in the uppermost layer; The three deposited layers, including the diamond-based mixed powder deposited layer located on the intermediate deposited layer, form a heavy laminated deposited layer, and the container filled with the laminated deposited layer is heated to high temperature and high pressure. 1,200 diamonds are loaded indoors and the laminated layers in the container meet the temperature and pressure conditions for stable diamonds.
Sintering temperature within the range of 1,50°C to 50,00°C
By applying a pressure in the range of 0k9/~ to 60,000k9/~, the diamond-based mixed powder deposited layer, the stellite material powder deposited layer, and the diamond-based mixture occurring at the contact area of these two deposited layers A diamond-based laminated sintered body characterized by producing a laminated sintered body in which three deposited layers, an intermediate deposited layer of an intermediate mixed powder of powder and stellite material powder, are sintered into a continuous integral sintered body. In this manufacturing method, the layered cutter material part, which is a sintered body of a diamond-based mixed powder that has extremely high hardness but weak toughness, is replaced with a sintered body of stellite material powder that has high hardness and strong mechanical strength. The layered intermediate material part, which is a sintered body of an intermediate mixed powder of a diamond-based mixed powder and a stellite material powder, which is interposed between the layered cutter material part and the layered substrate material part, is a medium. Hold firmly and strongly as a layer,
Three layers are successively formed: a layered cutter material part made of a diamond-based mixed powder, a layered intermediate material part made of a mixed powder of a diamond-based mixed powder and a stellite material powder, and a layered base material part made of a stellite material powder. The object of the present invention is to provide an industrially effective method for manufacturing a diamond-based laminated solid body which is integrally sintered and used as a cutting tool material exhibiting excellent cutting performance.

Next, the process and operation of manufacturing a diamond-based laminated solid body by the method of the present invention will be explained, and the diamond-based laminated solid body manufactured by the method of the present invention will be explained. When starting the manufacturing process, first, taromutungsten-cobalt alloy based stellite material powder is deposited in a layer inside a container to be loaded into a high-temperature, high-pressure generation chamber, and then the deposited layer of the stellite material powder is Above, 75% to 95% by weight of diamond powder and 25% to 5% by weight of powder of one metal selected from cobalt, nickel, and iron or mixed powder of two or more metals.
The diamond-based mixed powder mixed in a ratio selected from within the range of weight % is deposited in a layer to form a state in which the stellite material powder deposited layer and the diamond-based mixed powder deposited layer overlap in the container. In the overlapping deposited layers, the stellite material powder and the diamond-based mixed powder mix together at the upper contact area between the stellite material powder deposited layer and the diamond-based mixed powder deposited layer to form an intermediate mixed powder deposited layer. In the container, a laminated stacked layer consisting of three layers: a stellite material powder stacked layer, an intermediate mixed powder stacked layer, and a diamond-based mixed powder stacked layer is created. Next, the container filled with the three stacked layers is loaded into the high temperature and high pressure generation chamber.

Next, the work of sintering the laminated deposited layers in the container is carried out in two stages: preliminary sintering work and main sintering work, and the pre-sintering temperature and pre-sintering temperature used in the preliminary sintering work are the application pressure, the temperature within the range of 900°C to 1,100°C, and the
Select a pressure within the range of 0,000k9/Clll to 46,000kg/d, and set the main sintering temperature and main sintering pressure to a temperature within the range of 1,20°C to 1,600°C. and 50,000k9/~ to 60,000kg/Cll
In order to start the work of sintering the laminated layers in the container loaded into the high temperature and high pressure generation chamber, first, select the pressure within the range of Apply the selected pre-sintering pressure to the deposited layer. Next, the laminated stacked layer with the pre-sintering pressure applied is gradually heated to the selected pre-sintering temperature, and the pre-sintering temperature is maintained. 10 required heating
Lasts from 50 minutes to 50 minutes. In the stacked layers in the container that has been subjected to this preliminary sintering operation, there is a layer of diamond-based mixed powder, a layer of stellite material powder, and a layer of diamond-based mixed powder and stellite material powder. The three deposited layers are the deposited layer of the intermediate mixed powder generated at the contact area with the layer, and the deposited layer of the intermediate mixed powder overlaps the deposited layer of the stellite material powder, and the deposited layer of the intermediate mixed powder is formed. A deposited layer of the diamond-based mixed powder is stacked on top of the diamond-based mixed powder, creating a state in which the diamond-based mixed powder is incompletely sintered continuously from top to bottom. Next, the pre-sintering pressure that had been applied was increased to raise the temperature to the selected main sintering pressure, and then the heating that had been applied to maintain the pre-sintering temperature was increased to the selected main sintering pressure. The temperature is raised to the sintering temperature, and the heating required to maintain the main sintering temperature is maintained for 10 to 60 minutes. The incompletely sintered laminated layers in the container that have been subjected to this main sintering operation are exposed to the main sintering temperature and main sintering pressure, and the diamond particles are The diamond crystal remains stable, and the deposited layer of diamond-based mixed powder forms a diamond-based sintered body, and the deposited layer of stellite material powder produces a stellite sintered body, and the diamond-based mixed powder and sdellite material powder form a sintered body. The intermediate deposited layer of mixed powder produces an intermediate mixture sintered body part, and at the same time,
The intermediate mixture sintered body part and the diamond-based sintered body part are sintered together, and the intermediate mixture sintered body part and the stellite sintered body part are sintered together to form the diamond-based sintered body part. A state is produced in which three sintered body parts, the intermediate mixture sintered body part and the stellite sintered body part, are sintered integrally. Next, while maintaining the applied main sintering pressure, only the heating is stopped, and the high temperature and high pressure generation chamber is further cooled. Next, after the temperature in the chamber has decreased to 400° C., the main sintering pressure that had been applied is returned to normal pressure, the container is pushed out from the high temperature and high pressure generating chamber, and the sintered body is taken out from the container. The obtained sintered body contains 75% by weight of diamond powder.
95% to 95% by weight and a powder of one metal selected from cobalt, nickel, and iron or a mixed powder of two or more metals mixed at a ratio selected from within the range of 25% to 5% by weight. a layered diamond-based sintered body made of a diamond-based mixed powder; and an intermediate mixed sintered body consisting of a mixture of a diamond-based mixed powder and a stellite material powder at a contact area between the layered diamond-based mixed powder and the layered stellite material powder. Cutting in which three layers of the sintered body, the sintered body part and the layered stellite sintered body part made of powder of chromium-tungsten-cobalt alloy stellite material, continuously constitute an integrated laminated sintered body. This is a diamond-based laminated solid body used as a tool material. Next, the process of manufacturing a diamond-based laminated solid body to be used as a cutting tool material by the method of the present invention will be explained, and the manufactured diamond-based laminated solid body will be explained.

Example 1 Diamond-based mixed powder contains 78% diamond powder.
A diamond-based mixed powder containing 22% by weight of cobalt powder was used.

Stellite 6 material powder having a composition of 26% by weight of chromium, 5% by weight of tungsten, 1% by weight of carbon, and 68% by weight of cobalt was used as the stellite material powder.
To begin the process of manufacturing a diamond-based laminated solid body using the raw materials prepared in this way, first, stellite material powder was deposited in a layer with a thickness of 5 mm in a container, and on top of that,
The diamond-based mixed powder was deposited in a layer with a thickness of 1 mm to form a laminated deposited layer. Next, the container filled with the laminated deposited layer was loaded into a high temperature and high pressure generation chamber. Next, the work of sintering the laminated deposited layers in the loaded container is performed in two stages: preliminary sintering work and main sintering work,
The temperature and pressure for pre-sintering used in the pre-sintering work are 1,050℃ and 45,000K.
g/d pressure, and a temperature of 1,500°C and a pressure of 57,000 k9/Clll were selected as the main sintering temperature and pressure used in the main sintering work. .
Next, in order to begin the work of sintering the stacked stacked layers in the container, a pre-sintering pressure of 45,000 kg/Cll was applied to the stacked stacked layers in the container. continue,
Gradually heat the laminated stacked layer with pre-sintering pressure applied to the selected pre-sintering temperature of 1,050°C, and maintain the pre-sintering temperature. The required heating was maintained for 40 minutes. Next, the pre-sintering pressure that had been applied was increased to a main sintering pressure of 57.000k9/C.
The pressure was increased to fil. Next, the heating that had been applied to maintain the pre-sintering temperature was increased to the selected main sintering temperature of 1,500°C, which was necessary to maintain the main sintering temperature. Heating was continued for 50 minutes. Next, while maintaining the applied main sintering pressure, only the heating was stopped, and the high temperature and high pressure generation chamber was further cooled with water from the outside.

Next, after the temperature in the chamber has fallen to 400°C, the pressure for main sintering that was applied is returned to normal pressure, the container is pushed out of the high temperature and high pressure generation chamber, and the sintered body is taken out from inside the container. Ta. The obtained sintered body is a diamond-based sintered body consisting of a layered diamond-based sintered body having a composition of 78% by weight of diamond and 22% by weight of cobalt, and a mixed powder of diamond powder and cobalt powder. A layered intermediate mixture sintered body part made of the mixture at the contact area between the mixed powder deposited layer and the stellite material powder deposited layer made of stellite material powder, and a layered stellite sintered body part made of the stellite material powder. The diamond-based laminated solid body was used as a cutting tool material in which the sintered body parts of the layers were continuous and constituted an integral laminated sintered body. Example 2 The diamond-based mixed powder contains 74% of diamond powder.
Weight e, cobalt powder 16% by weight, nickel powder 1
A mixed powder mixed at a ratio of 0% by weight was used.

The stellite material powder has a composition of 25% by weight of chromium, 7.5% by weight of tungsten, 0.5% by weight of carbon, 10.5% by weight of nickel, and 56.5% by weight of cobalt. Powder of Stellite 31 material was used. A diamond-based laminated solid body was produced using the diamond-based mixed powder and stellite material powder thus prepared in the same manner as in Example 1. The sintered body obtained after completing the work contains 74% by weight of diamond and 1% of cobalt.
Consists of a layered diamond-based sintered body having a composition of 6% by weight and 10% by weight of nickel, and a mixed powder of diamond powder, cobalt powder, and nickel powder that produced the diamond-based sintered body. A layered intermediate mixture sintered body made of a mixture at the contact area between the deposited layer of diamond-based mixed powder and the deposited layer of stellite material powder that produced the stellite sintered body, and a layered stellite sintered body made of the stellite material powder. It was a diamond-based laminated solid body used as a cutting tool material in which three layers of the sintered body part and the body part continuously constituted an integrated laminated sintered body. A diamond-based tool made by brazing and polishing a chip made of a diamond-based laminated solid body produced in the example described above to a tool shank, and a tungsten carbide sintered body made by sintering tungsten carbide powder with cobalt. The results of cutting operations using a tungsten carbide tool which was brazed to a tool shank and polished were as follows.

When cutting a piston with a diameter of 80 mm and a length of 25 mm, which is made of Silumin with a composition of 88% by weight of aluminum and 12% by weight of silicon, if a tungsten carbide-based tool is used, it can be polished only once. 490 pieces could be cut continuously in one polishing process, whereas when diamond-based tools were used, 14,100 to 18,000 pieces could be cut in a single polishing process.
I was able to cut 200 pieces.

Claims (1)

[Claims] 1. Chromium-tungsten-cobalt alloy-based stellite material powder is deposited in a layer in a container, and diamond powder is directly on top of the deposited layer in an amount of 75% to 95% by weight and cobalt, nickel, and iron. 25% to 5% by weight of powder of one kind of metal or mixed powder of two or more kinds of metals selected from among
A diamond-based mixed powder mixed in a ratio selected from within the ratio range of weight % is deposited in layers, and a container filled with the stacked stacked layers is loaded into a high temperature and high pressure generation chamber, Exposure to sintering temperature and sintering pressure that satisfy the stable temperature and pressure conditions of diamond,
A diamond-based layered sintered body produced from a deposited layer of diamond-based mixed powder; and an intermediate produced from a deposited layer of mixed powder mixed at the contact area between the deposited layer of diamond-based mixed powder and the deposited layer of stellite material powder. It is confirmed that the three layered sintered body parts, the mixture layered sintered body part and the stellite layered sintered body part generated from the deposited layer of the stellite material powder, continuously constitute an integrated laminated sintered body. A diamond-based laminated solid body used as a cutting tool material. 2. In the container loaded into the high temperature and high pressure generation chamber, chrome-
Powder of tungsten-cobalt alloy stellite material is deposited in a layered manner, and 75% to 95% by weight of diamond powder and powder of one metal selected from cobalt, nickel, and iron or two are deposited directly on top of it. A diamond-based mixed powder in which a mixed powder of at least one metal is mixed in a ratio selected from 25% by weight to 5% by weight is deposited in a layer to form a laminated deposited layer, and the laminated deposited layer is formed. The container filled with the layers is loaded into a high temperature and high pressure generation chamber, and then the laminated deposited layers in the container are sintered in two stages: a preliminary sintering operation and a main sintering operation, The pre-sintering temperature and pre-sintering pressure used in the pre-sintering operation are within the range of 900°C to 1,100°C, and 40°C.
,000kg/cm^2 to 46,000kg/cm^
2, and set the main sintering temperature and main sintering pressure used in the main sintering work to 1,200°C.
Temperature within the range of 1,600℃ and 50,000kg/
Select a pressure within the range of cm^2 to 60,000 kg/cm^2, and then start the work of sintering the laminated deposited layer in the container loaded in the high temperature and high pressure generator.
First, a selected preliminary sintering pressure is applied to the stacked stacked layer in the container, and then the stacked stacked layer to which the pre-sintered pressure is applied is gradually heated to produce the selected pre-sintered layer. Raise the temperature to the sintering temperature, maintain the heating necessary to maintain the preliminary sintering temperature for 10 to 50 minutes, and then increase the applied pressure to the selected main sintering pressure. Boost the pressure to
Next, the heating applied to maintain the preliminary sintering temperature was increased to the selected main sintering temperature, and the heating necessary to maintain the main sintering temperature was continued for 10 minutes. ~60
Then, while maintaining the applied main sintering pressure, only the heating was stopped, and the high-temperature and high-pressure generation chamber was cooled, and the temperature was maintained after the temperature in the chamber had decreased to 400°C. A diamond-based layered sintered body part produced from a deposited layer of diamond-based mixed powder, and a diamond-based layered sintered body part produced from a deposited layer of diamond-based mixed powder, which is characterized by returning the main sintering pressure to normal pressure and taking out the sintered body from the high-temperature and high-pressure generation chamber. An intermediate mixture layered sintered body part mixed at the contact area between the deposited layer of the system mixed powder and the deposited layer of the stellite material powder, and a stellite material layered sintered body part generated from the deposited layer of the stellite material powder. A method for producing a diamond laminated solid body as a cutting tool material comprising a laminated sintered body with two layered sintered body parts.