JPS60110839A - Composite sintered structure body consisting of sintered hard material and high speed steel and production thereof - Google Patents

Abstract

PURPOSE:To produce a composite sintered structure body consisting of a sintered hard material and high speed steel having excellent high temp. hardness and toughness by mixing alloy powder of the sintered hard material and high speed steel powder at a specific ratio and sintering the mixture in the temp. range corresponding to the hardening temp. of the high speed steel. CONSTITUTION:A powder mixture prepd. by adding metallic powder as a sintering assistant to sintered hard material powder is sintered and the resultant sintered hard material alloy is pulverized. The powder obtd. by mixing 80-40wt% such sintered hard material alloy powder and 20-60% high speed steel powder is sintered in the temp. range of about 1,170-1,300 deg.C corresponding to the hardening temp. of the high speed steel by an ordinary temp. or high temp. compression sintering method, by which the sintered structure body is obtd. The sintered structure body consists of the sintered hard material part dispersed and bonded in the metal part-high speed steel sintered alloy structure of the above-mentioned sintered hard material alloy. Carbide, boride, nitride, silicide, oxide, etc. are used as the above-mentioned sintered hard material and >=1 kind among Co, Ni, Cr, Mo, W, Ti, Zr, Hf, V, Nb, Ta, Mn and Si are used as the sintering assistant metal.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a composite sintered structure of ultra-hard material and high-speed steel, and a method for producing the same.

The present invention relates to ultra-hard carbides and high-speed steel, ultra-hard borides and high-speed steel, ultra-hard nitrides and high-speed steel, ultra-hard silicides and high-speed steel, and ultra-hard oxides and high-speed steel, respectively. The present invention relates to a composite sintered tissue and a method for manufacturing the same.

When producing the ultra-hard high-speed steel composite sintered structure of the present invention, a mixed powder of ultra-hard powder and metal powder used as a sintering aid is sintered in order to produce the ultra-hard material. It uses sintered alloy powder, and the sintering aid metal powder and cobalt, nickel, iron,
1 selected from chromium, molybdenum, tungsten, titanium, zirconium, hafnium, vanadium, niobium, tantalum, manganese, silicon, aluminum, and copper
Powders of different metals, mixed powders of two or more metals, or powders of alloys of two or more metals are used. A trowel is used to use a powdered super-hard material alloy, which is a super-hard material-metal sintered alloy, produced by sintering a mixed powder in which such a sintering aid powder is added to a super-hard material powder. It is characterized by: A mixed powder obtained by adding high-speed steel powder to ultra-hard alloy powder descendants in such a state is used as a raw material for sintering. In the work of sintering such raw materials for sintering, the sintering aid, which is the metal part of each particle of the ultra-hard alloy powder, which is the constituent material of the raw material for sintering, and the individual particles of high-speed steel powder. The high-speed steel particles are used to perform metal sintering, and the sintering temperature used during the sintering operation is within a temperature range equivalent to the quenching temperature of high-speed steel.
, characterized in that a temperature within the range of 170°C to 1.300°C is used. By using a temperature corresponding to the quenching temperature of high-speed steel as the sintering temperature used in the sintering process, it is possible to prevent the delivery of sintered bodies of high-speed steel from becoming bulky. . The ultra-hard material high-speed steel composite sintered structure manufactured as described above is produced by sintering a mixed powder in which ultra-hard material powder is added with metal powder as a sintering aid. Ultra-hard alloy powder, which is made by pulverizing an ultra-hard alloy that is a sintered alloy. This is an ultra-hard high-speed steel composite sintered body produced by performing sintering at a temperature corresponding to this temperature as the quenching temperature. The object of the present invention is to create a high-performance ultra-hard high-speed steel composite sintered structure that has a high-temperature hardness significantly higher than that of high-speed steel and a toughness that is much higher than that of ultra-hard alloys. Engineering J! We offer ultra-hard material high-speed fIA with such high performance as the moon.
This article aims to provide an industrially effective method for producing a composite sintered body. The ultra-hard material high-speed copper composite sintered structure of the present invention obtained by manufacturing will be explained.

Example 1 75% by weight of tungsten carbide powder and 2% of cobalt powder
By sintering the mixed powder with a ratio of 5% by weight, V! ) The ratio of 70% by weight of tungsten carbide alloy powder obtained by powdering tungsten carbide alloy and 30% by weight of high speed steel powder (
- The mixed powder mixed with a trowel was used as a raw material for sintering. Then,
By the cold compression sintering method, the raw material for sintering is B ton
A compression molding was formed using a pressure of /ca, and then
The compression molded body was sintered in a vacuum furnace at a temperature of 1,250°C to form a sintered body.
The sintered body is a mixture of a large number of cobalt parts, which are the metal parts that separate the individual particles of the tungsten carbide alloy used as a component in the raw material for sintering, and a large number of particles of high-speed steel powder. An ultra-hard tungsten carbide high-speed steel composite in which a metal sintered structure produced by sintering in a sintered state is combined with a large number of tungsten carbide parts in individual particles of a tungsten carbide alloy to form a sintered structure. It was a sintered structure. The ultra-hard tungsten carbide high-speed steel composite sintered body produced by the method of the present invention has a hardness between that of tungsten carbide alloy and high-speed steel, and has a hardness close to that of tungsten carbide O, and has a tensile strength. It is a sintered body that is between high-speed steel and tungsten carbide alloy, and has a tensile strength stronger than tungsten carbide alloy, and is a material that can be fully used as a high-performance tool material.

Example 2 75% by weight of titanium carbide powder and 22.5% of nickel powder
Titanium carbide alloy powder obtained by sintering a mixed powder of 2.5 wt % molybdenum powder and 60 w fil % titanium carbide alloy powder and 40 w fil % high speed steel powder.
The mixed powder mixed in the ratio of % by weight was used as a raw material for sintering. Next, using the cold compression sintering method G, the raw material for sintering is molded into a compression molded body using a pressure of 8 tons/crix, and then the compression molded body is heated at 1,260°C in a vacuum furnace.
A sintered body was obtained by performing the sintering operation at a temperature of . The obtained sintered body contains a large number of nickel-chromium alloy parts, which are the metal parts of individual particles of titanium carbide gold used as a component in the raw material for sintering, and high-speed steel powder O. An ultra-hard metal sintered structure formed by sintering a large number of particles in a mixed state, and a sintered structure formed by combining a large number of titanium carbide parts in individual particles of a titanium carbide alloy. It was a titanium carbide high speed steel composite sintered structure. ”−
The ultra-hard titanium carbide high-speed steel composite sintered structure produced by the method Q of the present invention has a hardness that is between that of titanium carbide alloy and high-speed steel and is close to that of titanium carbide alloy. The tensile strength of this sintered body was between that of high-speed steel and titanium carbide alloy, and stronger than that of titanium carbide alloy, making it a material that could be fully used as a high-performance tool material.

Example 3 A titanium boride alloy obtained by sintering a mixed powder of 70% by weight of titanium boride powder, 20% by weight of nickel powder, and 10% by weight of chromium powder. A mixed powder obtained by mixing 60% by weight of powder and 40% by weight of high speed steel powder was used as a raw material for sintering. Next, the raw material for sintering was 8 tons/a by the cold compression sintering method.
A compression molded body was molded using a pressure of d, and the compression molded body was sintered in a vacuum furnace at a temperature of 1,270° C. to obtain a sintered body of 1:1. The sintered body is sintered Kawahara O;:1
A large number of individual particles of the titanium nitride alloy used as the 411j component in the nickel-chromium alloy HylH, which is the metal part, and a large number of particles of the high-speed steel powder are brought into a mixed state. The metal sintered structure produced by sintering is combined with individual particles of titanium boride alloy and a large number of titanium boride parts in the sintered structure to form an ultra-hard titanium boride high speed structure. It was a steel composite sintered structure. The ultra-hard titanium boride high-speed steel composite sintered structure produced by the method Q of the present invention has a hardness that is between that of titanium boride alloy and high-speed steel and is close to that of titanium boride alloy. It is a sintered body with a tensile strength that is between high-speed steel and titanium boride alloy, and has stronger tensile strength than titanium boride alloy, making it a material that can be fully used as a high-performance tool material. .

Example 4 70% by weight of zirconium boride powder and 2% of nickel powder
65% by weight of zirconium boride alloy powder, which is made by sintering a mixed powder of 0% by weight and 10% by weight of chromium powder, and 35% by weight of high-speed steel powder. The mixed powder mixed in the ratio of Next, by the cold compression sintering method, the sintering raw material is molded into a compression molded body using a pressure of B ton / ca, and the compression molded body is heated to 1.270 mm in a vacuum furnace.
A sintered body was obtained by performing a sintering operation at a temperature of °C. The sintered body consists of a large number of nickel-chromium alloy parts, which are the metal parts of the individual particles of the zirconium boride alloy used as a component in the raw material for sintering, and a large number of particles of high-speed steel powder. Ultra-hard zirconium boride, which is a metal sintered structure produced by sintering in a mixed state, is a sintered structure formed by bonding a large number of zirconium boride moieties in individual particles of a zirconium boride alloy. It was a high speed steel composite sintered structure. The ultra-hard zirconium boride high-speed steel composite sintered structure produced by the method of the present invention described in 1. has a hardness between that of zirconium boride alloy and high-speed steel, and has a hardness close to that of zirconium boride alloy. It is a sintered body with a tensile strength between high-speed steel and zirconium boride alloy, which is stronger than that of zirconium boride alloy, and it has a tensile strength that is sufficient for a high-performance double-unit 4A. It was a usable material.

Example 5 A titanium nitride alloy powder obtained by powdering a titanium nitride alloy obtained by sintering a mixed powder of 75% by weight of titanium nitride powder and 25% by weight of cobalt powder, and a jTC amount of 65%, A mixed powder obtained by mixing high-speed steel powder at a ratio of 35% by weight was used as a raw material for sintering. Next, the raw material for sintering is molded into a compression molded body using a pressure of 8 tons/ca by a cold compression sintering method, and the compression molded body is heated at a temperature of 1.26.0°C in a vacuum furnace. A sintered body was obtained by performing a trowel sintering operation. The sintered body is a mixture of a large number of cobalt parts, which are the metal parts of individual particles of the titanium nitride alloy used as the 414 component in the raw material for sintering, and a large number of particles of high-speed steel powder. Ultra-hard titanium nitride high-speed steel composite sintered body formed by sintering a metal sintered body in a state where a large number of titanium nitride parts in individual particles of titanium nitride alloy are combined to form a sintered body. It was an organized body.

The ultra-hard titanium nitride high-speed steel composite sintered structure produced by the method of the present invention described in ``--has a hardness between that of titanium nitride alloy and high-speed steel, and close to that of titanium nitride. In addition, the sintered body had a tensile strength between that of high-speed steel and a titanium nitride alloy, and had a tensile strength stronger than that of a titanium nitride alloy, and was a 4A material that could be used as a high-performance tool material.

Example 6 60% by weight of silicon nitride alloy powder obtained by pulverizing a silicon nitride alloy obtained by sintering a mixed powder of 75% by weight of silicon nitride (trisilicon tetranitride) powder and 25% by weight of cobalt powder %
A mixed powder obtained by mixing high-speed steel powder with 40 weight jjF, % in a proportion Q trowel was used as a raw material for sintering. Next, a sintered body was obtained by applying a pressure of 5 ton/cnf and simultaneously heating with a Q trowel at a temperature of 1,250°C using a high temperature compression sintering method. The sintered body consists of individual particles of the silicon nitride alloy used as the 41η component in the sintered Kawahara 1. A metal sintered structure generated by trowel sintering in a mixed state Q with a large number of . It was an ultra-hard silicon nitride high-speed steel composite sintered structure. The ultra-hard silicon nitride high-speed steel composite sintered structure produced by the method of the present invention described in 2. It is a sintered body with a tensile strength that is between high-speed steel and silicon nitride alloy, and stronger than silicon nitride alloy, and can be used as a high-performance tool material.

Example 7 70% by weight of molybdenum silicide powder and 15% by weight of nickel powder
60% by weight of molybdenum silicide alloy powder obtained by sintering a mixed powder with a ratio of 15% by weight and 11% by weight of chromium powder, and 4% by weight of high-speed steel powder.
The mixed powder mixed at a ratio of 0% by weight was used as a raw material for sintering.

Next, the sintered Kawahara 1:1 was 5
A sintered body was obtained by compressing using a pressure of ton/crl and simultaneously heating at a temperature of 1.250°C.

The sintered body consists of a large number of nickel-chromium alloy parts, which are the metal parts of the molybdenum silicide alloy powder used as constituent elements in the raw material for sintering, and high-speed steel powder. A metal sintered structure produced by trowel sintering in a mixed state with a large number of particles is a superstructure in which a large number of molybdenum silicide moieties in individual particles of a molybdenum silicide alloy are combined to form a sintered structure. It was a hard molybdenum silicide high speed steel composite sintered structure. The ultra-hard molybdenum silicide high-speed steel composite sintered body produced by the method of the present invention described above is
The hardness is between molybdenum silicide alloys and high-speed steels, and the hardness is close to molybdenum nitride alloys, and the tensile strength is also between high-speed steels and molybdenum silicide alloys.
The sintered body has a tensile strength stronger than that of molybdenum silicide alloys, and can be used as a high-performance tool material.

Example 8 70% by weight of alumina powder and 10% by weight of nickel powder.
i7j: Pll: 60% by weight of alumina alloy powder obtained by sintering a mixed powder of 20% by weight of chromium powder and 4% by weight of high speed steel powder.
The mixed powder mixed with 0% by weight using a trowel was used as a raw material for sintering. Next, the raw material for sintering was compressed using a pressure of 5 tons/cnl and simultaneously heated at a temperature of 1.270° C. to obtain a sintered body.

The sintered body consists of metal 171 (
A metal sintered structure produced by sintering a large number of nickel-chromium alloy T21S particles and a large number of high-speed steel powder particles in a mixed state is made up of individual particles of alumina alloy. This was an ultra-hard alumina high-speed steel composite sintered assembly A, in which a large number of alumina parts were combined to form a sintered body. The ultra-hard alumina high-speed steel composite sintered structure produced by the production method of the present invention described in I- has a hardness that is between that of alumina alloy and high-speed steel, and that is close to that of alumina alloy. The sintered body had a tensile strength between that of high-speed steel and an alumina alloy, and a tensile strength stronger than that of an alumina alloy, and had a monthly yield that allowed it to be used as a high-performance tool material.

Example 9 92% by weight of zirconium oxide and 8% by weight of ittria
Stabilized zirconia alloy powder is obtained by sintering a mixed powder of 70% by weight of stabilized zirconia powder, 15% by weight of nickel powder, and 15% by weight of chromium powder, which has the following composition: A mixed powder obtained by mixing 65% by weight of the stabilized zirconia powder and 35% by weight of high-speed steel powder was used as a raw material for sintering. Next, 5 tons/cr! of the raw material for sintering was produced using a high-temperature compression sintering method. A sintered body was obtained by compressing using a pressure of 260°C and heating at a temperature of 260°C. The sintered body contains a large number of stabilized nickel-chromium alloy parts used as constituents in the raw material for sintering, where L/-1 = metal in the individual particles of the alloy powder) 711; A metal sintered structure produced by sintering a large number of particles of high-speed steel powder in a mixed state binds a large number of stabilized zirconia parts in individual particles of stabilized zirconia alloy powder and sinters. 41 connective tissue bodies
It was a super-hard stabilized zirconia high speed 'M composite sintered structure made of four materials. The ultra-hard stabilized zirconia high-speed steel composite sintered structure produced by the production method of the present invention described in 1.
It has a hardness that is between that of stabilized zirconia alloys and high-speed steel, and is close to that of stabilized zirconia alloys, and a tensile strength that is between that of high-speed steels and stabilized zirconia alloys, and is stronger than stabilized zirconia alloys. The material was a sintered body that had the following characteristics and could be used as a high-performance tool material.

Claims (1)

[Scope of Claims] (1) Powder of a super-hard material G A super-hard material obtained by sintering a mixed powder containing a metal powder as a sintering aid - A super-hard material alloy which is a metal sintered material is powdered. It is a sintered structure obtained by sintering a mixed powder of ultra-hard alloy powder added to high-speed steel particles, and the metal in each individual particle of the large number of particles constituting the ultra-hard alloy powder is sintered. and a large number of high-speed steel particles in the high-speed steel powder ζ are sintered to form a metal part - a super-hard material alloy powder is formed inside the high-speed steel sintered alloy structure. An ultra-hard material high-speed steel composite sintered structure comprising a sintered structure in which ultra-hard material portions in individual particles of a large number of particles are dispersed and bonded. (2) A superhard material produced by sintering a mixed powder of superhard material powder and metal powder as a sintering aid - a superhard material produced by pulverizing a superhard material alloy that is a metal sintered alloy 80 powder
The raw material for sintering is a mixed powder obtained by mixing 1% to 40[1% by weight] and high speed steel powder at a ratio selected from within the ratio range of 20% to 60% by weight, and the raw material for sintering is An ultra-hard material characterized by producing a sintered structure by performing sintering using a cold compression sintering method or a high-temperature compression sintering method at a sintering temperature that corresponds to the quenching temperature of high-speed steel. A method for producing a high-speed steel composite sintered structure. (3) One metal selected from among cobalt, nickel, chromium, molybdenum, tungsten, titanium, zirconium, hafnium, vanadium-niobium-tankle, manganese, and silicon as a sintering aid in the ultra-hard carbide powder. 80% by weight of ultra-hard carbide powder, which is an unpulverized ultra-hard carbide alloy, which is an ultra-hard carbide-metal sintered alloy, produced by sintering a powder or a mixed powder of two or more metals. The raw material for sintering is a mixed powder in which 40% by weight and high speed steel powder are mixed at a ratio selected from within the ratio range of 20% to 60% by weight. An ultra-hard carbide material characterized in that a sintering process is performed using a compression sintering method or a high-temperature compression sintering method at a temperature equivalent to the quenching temperature of high-speed steel to produce a sintered structure. Manufacturing method of speed steel composite sintered structure d (4) Adding sintering aid to ultra-hard boride powder (rut, nickel, iron, chromium, molybdenum, tungnuten, titanium, zirconium)・Vanadium・Nioph・
Super produced by sintering a powder of one metal selected from tantalum, manganese, and silicon, a mixed powder of two or more metals, or a mixed powder of an alloy of two or more metals. The ultra-hard boride alloy powder, which is a hard boride-metal sintered alloy, is powdered from 80% to 40% by weight, and the high-speed steel powder is from 20% to 40% by weight. A mixed powder prepared by mixing speed steel powder in a ratio selected from within the ratio range of 20% by weight to 60% by weight is used as sintering Kawahara 4'l, and the raw material for sintering is sintered by cold compression sintering method or high temperature compression sintering method. An ultra-hard boride high-speed steel composite characterized by performing a sintering operation at a temperature corresponding to the sintering temperature of the high-speed steel using the compression sintering method O to produce a sintered structure. Method for manufacturing sintered tissue. (5) Kobal 1 as ultra-hard nitride powder sintering aid
1 selected from among nickel, iron, chromium, molybdenum, tungsten, titanium, zirconium, hafnium, vanadium, niobium, tantalum, manganese, and silicon.
Seed money 1.・Ultra-hard nitride produced by sintering a powder of the formula or a mixed powder of two or more metals or a mixed powder of two or more metal alloys - an ultra-hard metal sintered alloy A proportion i'r selected from within the ratio range of 80% to 40% by weight of ultra-hard nitride alloy powder obtained by pulverizing nitride alloy and 20% to 60% by weight of high speed steel powder.
The mixed powder mixed with the G trowel is used as a raw material for sintering, and the raw material for sintering is heated to a temperature equivalent to the quenching temperature of high-speed steel using a cold compression sintering method or a high temperature compression sintering method. A method for producing an ultra-hard nitride high-speed steel composite sintered structure, which comprises performing a sintering operation to generate a sintered structure. (6) Ultra-hard silicide powder, sintering aids of cobalt, nickel, iron, chromium, molybdenum, tungsten, titanium, zirconium, hafnium, vanadium, niobium-tantalum, manganese, silicon, aluminum, and copper. Ultra-hard silicide-metal sintered material produced by sintering a powder of one metal selected from among these, a mixed powder of two or more metals, or a mixed powder of an alloy of two or more metals. A ratio selected from within the ratio range of 80% to 40% by weight of superhard silicide alloy powder obtained by pulverizing the superhard silicide alloy that is the binder, and 20% to 40% by weight of high speed steel powder. The mixed powder mixed in is used as the raw material for sintering, and the raw material for sintering is subjected to the cold compression sintering method or the high temperature compression sintering method. A method for producing an ultra-hard silicide high-speed steel composite sintered body, the method comprising performing a sintering operation to generate a sintered body. (7) Addition of ultra-hard oxide powder as a sintering aid) L
y)・Nickel, iron, chromium, molybdenum, tungsten, titanium, zirconium, hafnium, vanadium, niobium, tantalum, manganese, silicon, aluminum,
One metal powder or two or more metals selected from copper.
An ultra-hard oxide produced by sintering a mixed powder of metals or a mixed powder of two or more metals.
Select from a ratio range of 80% to 40% by weight of superhard oxide alloy powder, which is a powdered superhard oxide alloy that is a metal sintered alloy, and 20% to 60% by weight of high speed steel powder. The mixed powder mixed at the same ratio is used as the raw material for sintering, and the raw material for sintering is sintered at a temperature equivalent to the quenching temperature of high-speed steel. A method for producing an ultra-hard oxide high-speed steel composite sintered body, the method comprising producing a sintered body by performing a sintering operation at a certain temperature.