CN107058849A - It is a kind of to be used to make cermet of valve body and preparation method thereof - Google Patents
It is a kind of to be used to make cermet of valve body and preparation method thereof Download PDFInfo
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- CN107058849A CN107058849A CN201710494076.8A CN201710494076A CN107058849A CN 107058849 A CN107058849 A CN 107058849A CN 201710494076 A CN201710494076 A CN 201710494076A CN 107058849 A CN107058849 A CN 107058849A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C30/00—Alloys containing less than 50% by weight of each constituent
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/04—Making non-ferrous alloys by powder metallurgy
- C22C1/05—Mixtures of metal powder with non-metallic powder
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Abstract
The invention discloses a kind of cermet for being used to make valve body, include the component of following mass fraction：5 ~ 15 parts of strontium carbide, 5 ~ 15 parts of titanium carbide, 10 ~ 20 parts of silicon nitride, 3 ~ 5 parts of boron nitride, 2 ~ 10 parts of electrofused mullite, 10 ~ 20 parts of tungsten powder, 1 ~ 5 part of chromium powder, 0.5 ~ 6 part of nickel powder, 2 ~ 8 parts of magnesia, 2 ~ 4 parts of zirconium dioxide.Various metals, carbide and oxide are added in the cermet formula of the present invention, these materials have played synergy in the performance of cermet, and mechanical strength and hardness of the cermet of preparation etc. are improved jointly.Provided by the present invention for making the characteristics of valve body cermet has lightweight, hardness high, good compression strength and bending strength.
Description
Technical field
The present invention relates to cermet field, and in particular to a kind of preparation method for being used to make the cermet of valve body.
Background technology
Because cermet has the advantages that high rigidity, high intensity, wear-resistant, high temperature resistant, have in national defence and civil area
Boundless development prospect.Hard alloy is the metalloid ceramics that commercial Application is earliest, consumption is maximum, in skiver
Tool, grinding tool, it is wear-resisting, heat-resisting, anti-corrosion in terms of be used widely, and thereby promote with oxide, boride, nitride,
Carbonitride ceramic is mutually the development of the cermet of hard phase.At present, the primary articles of cermet have cutter, grinding tool, magnetic
Property material heating element heater, anti-friction bearing, corrosion resistant component be widely used in metallurgical production, turbine manufacture and rocketry
On.The hardness and bending strength of cermet are to investigate two important parameters of cermet performance, and conventional cermet is hard
Degree and bending strength are relatively low, license notification number for CN101871070 a kind of ceramic-metal composite of disclosure of the invention,
Composite includes ilmenite powder, aluminium powder, graphite, and it has higher hardness and bending strength.
The content of the invention
In order to overcome deficiency of the prior art, the invention provides a kind of preparation for being used to make the cermet of valve body
Method.
In order to solve the above-mentioned technical problem, the present invention is adopted the following technical scheme that：
A kind of cermet for being used to make valve body, includes the component of following mass fraction：
5 ~ 15 parts of strontium carbide,
5 ~ 15 parts of titanium carbide,
10 ~ 20 parts of silicon nitride,
3 ~ 5 parts of boron nitride,
2 ~ 10 parts of electrofused mullite,
10 ~ 20 parts of tungsten powder,
1 ~ 5 part of chromium powder,
0.5 ~ 6 part of nickel powder,
2 ~ 8 parts of magnesia,
2 ~ 4 parts of zirconium dioxide.
Preferably, the described cermet for being used to make valve body, includes the component of following mass fraction：
8 ~ 12 parts of strontium carbide,
8 ~ 12 parts of titanium carbide,
14 ~ 16 parts of silicon nitride,
4 ~ 5 parts of boron nitride,
5 ~ 8 parts of electrofused mullite,
12 ~ 16 parts of tungsten powder,
2 ~ 3 parts of chromium powder,
2 ~ 4 parts of nickel powder,
3 ~ 5 parts of magnesia,
2 ~ 3 parts of zirconium dioxide.
Preferably, the strontium carbide, titanium carbide, silicon nitride, boron nitride, electrofused mullite, tungsten powder, chromium powder, nickel powder,
Magnesia, the particle diameter of zirconium dioxide are 0.5 ~ 2 μm.
Preferably, impurity content is less than 1 part in the electrofused mullite, and the mass ratio of aluminum oxide, silica is 2 ~ 4
∶1。
A kind of preparation method for being used to make the cermet of valve body, comprises the following steps：（1）Take respectively by weight, carbon
Change 5 ~ 15 parts of strontium, 5 ~ 15 parts of titanium carbide, 10 ~ 20 parts of silicon nitride, 3 ~ 5 parts of boron nitride, 2 ~ 10 parts of electrofused mullite, tungsten powder
10 ~ 20 parts, 1 ~ 5 part of chromium powder, 0.5 ~ 6 part of nickel powder, 2 ~ 8 parts of magnesia, 2 ~ 4 parts of zirconium dioxide.Mentioned component is first carried out pre-
Mixing, carries out mixed at high speed again after mixing；（2）Cermet raw material after will be well mixed carries out ball milling with ball mill；（3）Ball
Metal ceramic powder is put into metal heat pressing stove after mill and carries out hot pressing, is high duty metal ceramics after cooling.
Preferably, step（1）High speed is blended in high-speed mixer and carried out, and high-speed mixer rotating speed is 200r/
Min, incorporation time is 15min ~ 35min.
Preferably, step（2）Ratio of grinding media to material is 40 during middle ball milling:1~70:1, drum's speed of rotation is 150 ~ 180r/min,
Ball-milling Time is 1.5 ~ 4.5h.
Preferably, step（3）Metal ceramic powder is put into metal heat pressing stove specially after ball milling, to metal heat pressing
Nitrogen is poured in stove, hot pressing furnace is heated up, heating rate is 25 DEG C/min, 30 ~ 50min is incubated when being warming up to 550 DEG C, then
Heating rate according to 40 DEG C/min rises to temperature for 820 ~ 860 DEG C, then is incubated 20min ~ 40min, according still further to 30 DEG C/min's
It is 1220 ~ 1360 DEG C that heating rate, which rises to temperature, and sintering time is 2 ~ 3h, is reduced to room temperature, rate of temperature fall is 25 DEG C/min, cold
But it is afterwards high duty metal ceramics.
The beneficial effects of the invention are as follows：
Various metals, nitride, carbide and oxide are added in the ceramal formula of the present invention, these materials are in metal
Synergy has been played in the performance of ceramics, mechanical strength and hardness of the cermet of preparation etc. are improved jointly.The present invention
There is provided be used for make the characteristics of valve body cermet has lightweight, hardness high, good compression strength and bending strength.
Embodiment
With reference to embodiment, the invention will be further described：
Embodiment 1：
A kind of cermet for being used to make valve body, includes the component of following mass fraction：15 parts of strontium carbide, 5 parts of titanium carbide,
20 parts of silicon nitride, 3 parts of boron nitride, 2 parts of electrofused mullite, 20 parts of tungsten powder, 1 part of chromium powder, 6 parts of nickel powder, 2 parts of magnesia, two
4 parts of zirconium oxide.Wherein, strontium carbide, titanium carbide, silicon nitride, boron nitride, electrofused mullite, tungsten powder, chromium powder, nickel powder, oxidation
Magnesium, the particle diameter of zirconium dioxide are 0.5 ~ 2 μm, and impurity content is less than 1 part, and the matter of aluminum oxide, silica in electrofused mullite
Amount is than being 4: 1.
The above-mentioned preparation method for being used to make the cermet of valve body, comprises the following steps：
（1）Take 15 parts of strontium carbide, 5 parts of titanium carbide, 20 parts of silicon nitride, 3 parts of boron nitride, electrofused mullite 2 respectively by weight
Part, mentioned component is first pre-mixed by 20 parts of tungsten powder, 1 part of chromium powder, 6 parts of nickel powder, 2 parts of magnesia, 4 parts of zirconium dioxide,
Put into after mixing in high-speed mixer, high-speed mixer rotating speed is 200r/min, and incorporation time is 35min；
（2）Cermet raw material after will be well mixed carries out ball milling with ball mill, and ratio of grinding media to material is 40 during ball milling:1, ball mill turns
Speed is 180r/min, and Ball-milling Time is 1.5h；
（3）Metal ceramic powder is put into metal heat pressing stove after ball milling, nitrogen is poured into metal heat pressing stove, hot pressing furnace is entered
Row heating, heating rate is 25 DEG C/min, is incubated 30min when being warming up to 550 DEG C, the heating rate according still further to 40 DEG C/min rises to
Temperature is 860 DEG C, then is incubated 20min, and according still further to 30 DEG C/min heating rate, to rise to temperature be 1360 DEG C, and sintering time is
2h, is reduced to room temperature, and rate of temperature fall is 25 DEG C/min, is high duty metal ceramics after cooling.
Embodiment 2
A kind of cermet for being used to make valve body, includes the component of following mass fraction：5 parts of strontium carbide, 15 parts of titanium carbide,
10 parts of silicon nitride, 5 parts of boron nitride, 10 parts of electrofused mullite, 10 parts of tungsten powder, 5 parts of chromium powder, 0.5 part of nickel powder, magnesia 8
Part, 2 parts of zirconium dioxide.Wherein, strontium carbide, titanium carbide, silicon nitride, boron nitride, electrofused mullite, tungsten powder, chromium powder, nickel powder, oxygen
It is 0.5 ~ 2 μm to change magnesium, the particle diameter of zirconium dioxide, and impurity content is less than 1 part in electrofused mullite, and aluminum oxide, silica
Mass ratio is 2: 1.
The above-mentioned preparation method for being used to make the cermet of valve body, comprises the following steps：
（1）Take 5 parts of strontium carbide, 15 parts of titanium carbide, 10 parts of silicon nitride, 5 parts of boron nitride, electrofused mullite 10 respectively by weight
Part, 10 parts of tungsten powder, 5 parts of chromium powder, 0.5 part of nickel powder, 8 parts of magnesia, 2 parts of zirconium dioxide is first premixed mentioned component
Close, put into after mixing in high-speed mixer, high-speed mixer rotating speed is 200r/min, and incorporation time is 15min；
（2）Cermet raw material after will be well mixed carries out ball milling with ball mill, and ratio of grinding media to material is 70 during ball milling:1, ball mill turns
Speed is 150r/min, and Ball-milling Time is 4.5h；
（3）Metal ceramic powder is put into metal heat pressing stove after ball milling, nitrogen is poured into metal heat pressing stove, hot pressing furnace is entered
Row heating, heating rate is 25 DEG C/min, is incubated 50min when being warming up to 550 DEG C, the heating rate according still further to 40 DEG C/min rises to
Temperature is 820 DEG C, then is incubated 40min, and according still further to 30 DEG C/min heating rate, to rise to temperature be 1220 DEG C, and sintering time is
3h, is reduced to room temperature, and rate of temperature fall is 25 DEG C/min, is high duty metal ceramics after cooling.
Embodiment 3
A kind of cermet for being used to make valve body, includes the component of following mass fraction：8 parts of strontium carbide, 12 parts of titanium carbide,
14 parts of silicon nitride, 4 parts of boron nitride, 8 parts of electrofused mullite, 16 parts of tungsten powder, 2 parts of chromium powder, 2 parts of nickel powder, 5 parts of magnesia, two
2 parts of zirconium oxide.Wherein, strontium carbide, titanium carbide, silicon nitride, boron nitride, electrofused mullite, tungsten powder, chromium powder, nickel powder, magnesia,
The particle diameter of zirconium dioxide is 0.5 ~ 2 μm, and impurity content is less than 1 part, and the mass ratio of aluminum oxide, silica in electrofused mullite
For 3: 1.
The above-mentioned preparation method for being used to make the cermet of valve body, comprises the following steps：
（1）Take 8 parts of strontium carbide respectively by weight, 12 parts of titanium carbide, 14 parts of silicon nitride, 4 parts of boron nitride, 8 parts of electrofused mullite,
Mentioned component is first pre-mixed by 16 parts of tungsten powder, 2 parts of chromium powder, 2 parts of nickel powder, 5 parts of magnesia, 2 parts of zirconium dioxide, is mixed
Put into after conjunction in high-speed mixer, high-speed mixer rotating speed is 200r/min, and incorporation time is 25min；
（2）Cermet raw material after will be well mixed carries out ball milling with ball mill, and ratio of grinding media to material is 50 during ball milling:1, ball mill turns
Speed is 165r/min, and Ball-milling Time is 3h；
（3）Metal ceramic powder is put into metal heat pressing stove after ball milling, nitrogen is poured into metal heat pressing stove, hot pressing furnace is entered
Row heating, heating rate is 25 DEG C/min, is incubated 40min when being warming up to 550 DEG C, the heating rate according still further to 40 DEG C/min rises to
Temperature is 840 DEG C, then is incubated 30min, and according still further to 30 DEG C/min heating rate, to rise to temperature be 1280 DEG C, and sintering time is
2.5h, is reduced to room temperature, and rate of temperature fall is 25 DEG C/min, is high duty metal ceramics after cooling.
Embodiment 4
A kind of cermet for being used to make valve body, includes the component of following mass fraction：12 parts of strontium carbide, 8 parts of titanium carbide,
16 parts of silicon nitride, 5 parts of boron nitride, 5 parts of electrofused mullite, 12 parts of tungsten powder, 3 parts of chromium powder, 4 parts of nickel powder, 3 parts of magnesia, two
3 parts of zirconium oxide.Wherein, strontium carbide, titanium carbide, silicon nitride, boron nitride, electrofused mullite, tungsten powder, chromium powder, nickel powder, oxidation
Magnesium, the particle diameter of zirconium dioxide are 0.5 ~ 2 μm, and impurity content is less than 1 part, and the matter of aluminum oxide, silica in electrofused mullite
Amount is than being 3: 1.
The above-mentioned preparation method for being used to make the cermet of valve body, comprises the following steps：
（1）Take 12 parts of strontium carbide, 8 parts of titanium carbide, 16 parts of silicon nitride, 5 parts of boron nitride, electrofused mullite 5 respectively by weight
Part, mentioned component is first pre-mixed by 12 parts of tungsten powder, 3 parts of chromium powder, 4 parts of nickel powder, 3 parts of magnesia, 3 parts of zirconium dioxide,
Put into after mixing in high-speed mixer, high-speed mixer rotating speed is 200r/min, incorporation time is 15min ~ 35min；
（2）Cermet raw material after will be well mixed carries out ball milling with ball mill, and ratio of grinding media to material is 60 during ball milling:1, ball mill turns
Speed is 160r/min, and Ball-milling Time is 3h；
（3）Metal ceramic powder is put into metal heat pressing stove after ball milling, nitrogen is poured into metal heat pressing stove, hot pressing furnace is entered
Row heating, heating rate is 25 DEG C/min, is incubated 40min when being warming up to 550 DEG C, the heating rate according still further to 40 DEG C/min rises to
Temperature is 840 DEG C, then is incubated 30min, and according still further to 30 DEG C/min heating rate, to rise to temperature be 1300 DEG C, and sintering time is
2.5h, is reduced to room temperature, and rate of temperature fall is 25 DEG C/min, is high duty metal ceramics after cooling.
Cermet made from embodiment 1 to 4 is tested, the numerical value such as institute of table 1 of the toughness, hardness and the density that measure
Show：
Table 1
Technological means disclosed in the present invention program is not limited only to the technological means disclosed in above-mentioned embodiment, in addition to by with
Upper technical characteristic is combined constituted technical scheme.It should be pointed out that for those skilled in the art,
Under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications are also considered as this hair
Bright protection domain.
Claims (8)
1. a kind of cermet for being used to make valve body, it is characterised in that include the component of following mass fraction：
5 ~ 15 parts of strontium carbide,
5 ~ 15 parts of titanium carbide,
10 ~ 20 parts of silicon nitride,
3 ~ 5 parts of boron nitride,
2 ~ 10 parts of electrofused mullite,
10 ~ 20 parts of tungsten powder,
1 ~ 5 part of chromium powder,
0.5 ~ 6 part of nickel powder,
2 ~ 8 parts of magnesia,
2 ~ 4 parts of zirconium dioxide.
2. the cermet as claimed in claim 1 for being used to make valve body, it is characterised in that include the group of following mass fraction
Point：
8 ~ 12 parts of strontium carbide,
8 ~ 12 parts of titanium carbide,
14 ~ 16 parts of silicon nitride,
4 ~ 5 parts of boron nitride,
5 ~ 8 parts of electrofused mullite,
12 ~ 16 parts of tungsten powder,
2 ~ 3 parts of chromium powder,
2 ~ 4 parts of nickel powder,
3 ~ 5 parts of magnesia,
2 ~ 3 parts of zirconium dioxide.
3. the cermet as claimed in claim 1 for being used to make valve body, it is characterised in that the strontium carbide, carbonization
Titanium, silicon nitride, boron nitride, electrofused mullite, tungsten powder, chromium powder, nickel powder, magnesia, the particle diameter of zirconium dioxide are 0.5 ~ 2 μm.
4. the cermet as claimed in claim 1 for being used to make valve body, it is characterised in that impurity in the electrofused mullite
Content is less than 1 part, and the mass ratio of aluminum oxide, silica is 2 ~ 4: 1.
5. a kind of preparation method for being used to make the cermet of valve body, it is characterised in that comprise the following steps：（1）By weight
5 ~ 15 parts of strontium carbide, 5 ~ 15 parts of titanium carbide, 10 ~ 20 parts of silicon nitride, 3 ~ 5 parts of boron nitride, electrofused mullite 2 ~ 10 are taken respectively
Part, 10 ~ 20 parts of tungsten powder, 1 ~ 5 part of chromium powder, 0.5 ~ 6 part of nickel powder, 2 ~ 8 parts of magnesia, 2 ~ 4 parts of zirconium dioxide, by mentioned component
First it is pre-mixed, carries out mixed at high speed after mixing again；（2）Cermet raw material after will be well mixed carries out ball with ball mill
Mill；（3）Metal ceramic powder is put into metal heat pressing stove after ball milling and carries out hot pressing, is high duty metal ceramics after cooling.
6. the preparation method as claimed in claim 5 for being used to make the cermet of valve body, it is characterised in that step（1）In
Mixed at high speed is carried out in high-speed mixer, and high-speed mixer rotating speed is 200r/min, and incorporation time is 15min ~ 35min.
7. the preparation method as claimed in claim 5 for being used to make the cermet of valve body, it is characterised in that step（2）In
Ratio of grinding media to material is 40 during ball milling:1~70:1, drum's speed of rotation is 150 ~ 180r/min, and Ball-milling Time is 1.5 ~ 4.5h.
8. the preparation method as claimed in claim 5 for being used to make the cermet of valve body, it is characterised in that step（3）Tool
Body pours nitrogen to put into metal ceramic powder in metal heat pressing stove after ball milling into metal heat pressing stove, and hot pressing furnace is carried out
Heating, heating rate is 25 DEG C/min, 30 ~ 50min is incubated when being warming up to 550 DEG C, according still further to 40 DEG C/min heating rate liter
Be 820 ~ 860 DEG C to temperature, then be incubated 20min ~ 40min, according still further to 30 DEG C/min heating rate rise to temperature for 1220 ~
1360 DEG C, sintering time is 2 ~ 3h, is reduced to room temperature, and rate of temperature fall is 25 DEG C/min, is high duty metal ceramics after cooling.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108149106A (en) * | 2017-12-27 | 2018-06-12 | 洛阳神佳窑业有限公司 | A kind of preparation method of cermet mold |
| CN112301246A (en) * | 2019-07-30 | 2021-02-02 | 上海永言特种材料研究所 | Preparation method of wear-resistant metal ceramic with small thermal expansion coefficient |
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| CN112301246A (en) * | 2019-07-30 | 2021-02-02 | 上海永言特种材料研究所 | Preparation method of wear-resistant metal ceramic with small thermal expansion coefficient |
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Application publication date: 20170818 |