CN109518072A - A kind of high vanadium alloy carbide additive and its preparation method, application - Google Patents
A kind of high vanadium alloy carbide additive and its preparation method, application Download PDFInfo
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- CN109518072A CN109518072A CN201811192022.7A CN201811192022A CN109518072A CN 109518072 A CN109518072 A CN 109518072A CN 201811192022 A CN201811192022 A CN 201811192022A CN 109518072 A CN109518072 A CN 109518072A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22C35/00—Master alloys for iron or steel
- C22C35/005—Master alloys for iron or steel based on iron, e.g. ferro-alloys
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/02—Making ferrous alloys by powder metallurgy
- C22C33/0207—Using a mixture of prealloyed powders or a master alloy
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Abstract
The invention discloses a kind of high vanadium alloy carbide additives, are formed by the component of following weight percent: 48-55% chromium carbide, 40-45% molybdenum carbide, 4-8% niobium carbide.The invention also discloses the preparation methods and business of a kind of high vanadium alloy carbide additive, including ball milling, slotting sieve to be granulated, vacuumize sintering, heat preservation dumping and furnace cooling, obtains high vanadium alloy carbide additive.The present invention, which selects dystectic metal carbides and infiltrates good metal carbides with high-vandium steel matrix grain, sinters alloy carbide into, it is added to the high vanadium alloy green body of powder to be sintered, high vanadium alloy densification temperature range can be expanded, it is infiltrated with high-vandium steel grain boundary, crystal grain when being able to suppress the sintering of high vanadium alloy is grown up, high vanadium alloy hardness and strength are improved, the sintering range of powder sintered high vanadium alloy steel has been widened.
Description
Technical field
The present invention relates to inorganic metal composite granule technical field, in particular to a kind of high vanadium alloy carbide additive
And its preparation method, application.
Background technique
Currently, the known high vanadium alloy in market is the high-carbon alloy steel that vanadium content is 3~10%, due to melting high-vandium steel
There are problems that serious carbide segregation, high vanadium alloy generallys use powder sintered method and is made.But powder sintered height
The problem of vanadium alloy material maximum is exactly that its sintering range is narrow, is caused when densified sintering product (relative density reaches 97%)
When, have occurred and that crystal grain is grown up in high vanadium alloy material matrix, when sintering temperature is more than 15 DEG C of densification temperature, sintered blank
The fusing of body large area, and serious carbide segregation occurs, these disadvantages of the prior art will all greatly reduce powder sintered obtain
High vanadium alloy intensity and hardness, seriously affected the comprehensive performance of high vanadium alloy material.
For this purpose, it is necessory to develop one kind avoid occur carbide segregation and prevent crystal grain from growing up, sintering range
Wider high vanadium alloy carbide additive is used for the sintering of high vanadium alloy material.
Summary of the invention
It is an object of the present invention to be directed to the above-mentioned deficiency of the prior art, a kind of high vanadium alloy carbide addition is provided
Agent and its preparation method, application, using chromium carbide, molybdenum carbide and three kinds of carbide powders of niobium carbide are complex sintered forms, and are used for powder
Densification temperature range is expanded when being sintered in high vanadium alloy green body, effectively inhibits powder sintered high-vandium steel matrix grain long
Greatly, the comprehensive performances such as high vanadium alloy intensity and hardness are improved.
The technical scheme adopted by the invention to achieve the purpose is as follows:
A kind of high vanadium alloy carbide additive, is formed by the component of following weight percent: 48-55% chromium carbide,
40-45% molybdenum carbide, 4-8% niobium carbide.
A kind of high vanadium alloy carbide additive, is formed: 50% chromium carbide, 45% by the component of following weight percent
Molybdenum carbide, 5% niobium carbide.
A kind of high vanadium alloy carbide additive, is formed: 52% chromium carbide, 42% by the component of following weight percent
Molybdenum carbide, 6% niobium carbide.
Preferably, high vanadium alloy carbide additive, the chromium carbide, molybdenum carbide, niobium carbide purity 99%
More than.
Preferably, the chromium carbide, molybdenum carbide, niobium carbide partial size be 4~8 μm.
A kind of preparation method of high vanadium alloy carbide additive comprising following steps:
S1: being added in ball grinder after chromium carbide, molybdenum carbide, niobium carbide are mixed, and dehydrated alcohol leaching is added in ball grinder
Do not have ball material, ball grinder is covered and carries out ball milling after vacuumizing, after the completion of ball milling, takes out slurry and sift out abrading-ball, later in carbide
Granulating agent is added in slurry, is carried out inserting sieve granulation, is obtained mixed carbide particle；
S2: mixed carbide particle being sintered in the crystal vessel of vacuum resistance sintering furnace, is evacuated down to 10Pa,
Heat up heat-agglomerating later, keeps the temperature dumping, and furnace cooling later obtains high vanadium alloy carbide additive.
Preferably, ball milling ball uses sintered carbide ball in the step S1, and ball milling ratio of grinding media to material is 1:1-1.5, when ball milling
Between 18-22 hours；The granulating agent is atoleine, and dosage is that the mass percent of carbide slurry is 20-30%；Gained
The partial size of mixed carbide particle is 120~150 microns.
Preferably, step S2 heating heat-agglomerating: heating rate is 10-15 DEG C/min, is protected at 600-700 DEG C
Warm 1-1.5h carries out dumping, in 1600-1700 DEG C of heat preservation 2-3h.
Preferably, the partial size of resulting high vanadium alloy carbide additive is 100-150 microns.
A kind of application of high vanadium alloy carbide additive, the high vanadium alloy carbide additive add quality percentage
Than carrying out mixing and ball milling granulation and green compact sintering into high vanadium alloy powder green body for 4%~6%, high vanadium alloy can be prevented
Steel powder grain is grown up, and sintering range is extended.
Compared with prior art, high vanadium alloy carbide additive of the invention uses chromium carbide, molybdenum carbide and carbonization
Three kinds of carbide powders of niobium by ball milling, granulation, it is complex sintered form, preferably with dystectic metal carbides and with high vanadium
Steel matrix crystal grain infiltrates good metal carbides and sinters alloy carbide into, which is added the high vanadium of powder
In steel alloy green body, high vanadium alloy densification temperature range can be expanded, when sintering can be very good and high-vandium steel crystal circle
Face infiltration, is uniformly mixed, and crystal caused by preventing crystallite body interface from melting is grown up, and is able to suppress the crystalline substance when sintering of high vanadium alloy
Grain length is big, and when sintering temperature is more than 15 DEG C of densification temperature or more, the fusing of sintered body large area or carbide does not occur
Segregation, improves high vanadium alloy hardness and strength, reaching densification temperature in sintering temperature, (densified sintering product relative density reaches
97%) when, there is no matrix grains to grow up, and has widened the sintering range of powder sintered high vanadium alloy steel.
Above-mentioned is the general introduction of inventive technique scheme, and below in conjunction with specific embodiment, the present invention will be further described.
Specific embodiment:
In order to which the purpose of the present invention and technical solution and advantage is more clearly understood, make with reference to embodiments specifically
It is bright.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not intended to limit the present invention.
Embodiment 1
A kind of high vanadium alloy carbide additive of the present embodiment, is formed: 50% by the component of following weight percent
Chromium carbide, 45% molybdenum carbide, 5% niobium carbide.Selected chromium carbide, molybdenum carbide, niobium carbide purity 99% or more；Carbonization
Chromium, molybdenum carbide, niobium carbide partial size be 4~8 μm.
The preparation method of above-mentioned high vanadium alloy carbide additive comprising following steps:
S1 powder mixing and ball milling is granulated: being added in ball grinder after chromium carbide, molybdenum carbide, niobium carbide are mixed, ball milling ball is adopted
With sintered carbide ball, ball milling ratio of grinding media to material is 1:1, and ball Material product accounts for the half of ball milling tank volume, anhydrous second is added in ball grinder
Alcohol floods ball material, and then ball grinder capping is evacuated, finally carries out ball milling, Ball-milling Time 20 hours, after the completion of ball milling, takes
Pulp material screen goes out abrading-ball, mixed carbide slurry is added granulating agent atoleine, granulating agent dosage is the matter of carbide slurry
Measuring percentage is 22%；Then it inserts sieve to be granulated, mixed carbide particle after granulation, partial size is 120~150 microns.Using carbonization
Chromium, three kinds of carbide powders of molybdenum carbide and niobium carbide by ball milling, granulation, it is complex sintered form, preferably with dystectic metal
Carbide and good metal carbides are infiltrated with high-vandium steel matrix grain sintering alloy carbide into, when sintering can be fine
With high-vandium steel grain boundary infiltrate, be uniformly mixed, prevent crystallite body interface melt caused by crystal grow up.
The sintering of S2 carbide additive: mixed carbide particle is carried out in the crystal vessel of vacuum resistance sintering furnace
Sintering, is evacuated down to 10Pa, and heat up heat-agglomerating later, and heating rate is 15 DEG C/min, and 1h is kept the temperature at 600 DEG C and is arranged
Glue, in 1600 DEG C of heat preservation 2h.Furnace cooling later obtains high vanadium alloy carbide additive to room temperature, and resulting high vanadium closes
The partial size of golden steel carbide additive is 100-150 microns.The temperature-time and heating rate of sintering are controlled, burnt
When junction temperature reaches densification temperature (densified sintering product relative density reaches 97%), there is no matrix grains to grow up, and is being sintered
When temperature is more than 15 DEG C of densification temperature or more, the fusing of sintered body large area or carbide segregation does not occur.
Resulting high vanadium alloy carbide additive agent powder is added in high vanadium alloy powder by 4% mass percent
Mixing and ball milling granulation, then green compact is sintered, and when can make high vanadium alloy sintering densification, matrix grain is not grown up, and can be hindered
Only high vanadium alloy powder grain is grown up, and is extended sintering range, is promoted the intensity and hardness of high vanadium alloy.
Embodiment 2
A kind of high vanadium alloy carbide additive of the present embodiment, it is substantially the same manner as Example 1, the difference is that,
It is formed by the component of following weight percent: 52% chromium carbide, 42% molybdenum carbide, 6% niobium carbide.The difference of preparation method
It is in in the granulation of step S1 powder mixing and ball milling: being added in ball grinder after chromium carbide, molybdenum carbide, niobium carbide are mixed, ball
Mill ratio of grinding media to material be 1:3, Ball-milling Time 22 hours；After the completion of ball milling, the dosage for adding granulating agent is the quality hundred of carbide slurry
Divide than being 25%；In the sintering of step S2 carbide additive: the heating rate for the heat-agglomerating that heats up is 12 DEG C/min,
1.2h is kept the temperature at 700 DEG C and carries out dumping, in 1600 DEG C of heat preservation 3h.Resulting high vanadium alloy carbide additive agent powder is pressed
Mixing and ball milling granulation in high vanadium alloy powder is added in 6% mass percent, and then green compact is sintered, and high vanadium alloy can be made to be sintered
When densification, matrix grain is not grown up, and high vanadium alloy powder grain can be prevented to grow up, and is extended sintering range, is mentioned
Increase the intensity and hardness of vanadium alloy.
Embodiment 3
A kind of high vanadium alloy carbide additive of the present embodiment, it is substantially the same manner as Example 1, the difference is that,
It is formed by the component of following weight percent: 48% chromium carbide, 44% molybdenum carbide, 8% niobium carbide.The difference of preparation method
It is in in the granulation of step S1 powder mixing and ball milling: being added in ball grinder after chromium carbide, molybdenum carbide, niobium carbide are mixed, ball
Grind ratio of grinding media to material be 1.5, Ball-milling Time 18 hours；After the completion of ball milling, the dosage for adding granulating agent is the quality hundred of carbide slurry
Divide than being 30%；In the sintering of step S2 carbide additive: the heating rate for the heat-agglomerating that heats up is 10 DEG C/min,
1h is kept the temperature at 700 DEG C and carries out dumping, in 1700 DEG C of heat preservation 2.5h.Resulting high vanadium alloy carbide additive agent powder is pressed
Mixing and ball milling granulation in high vanadium alloy powder is added in 5% mass percent, and then green compact is sintered, and high vanadium alloy can be made to be sintered
When densification, matrix grain is not grown up, and high vanadium alloy powder grain can be prevented to grow up, and is extended sintering range, is mentioned
Increase the intensity and hardness of vanadium alloy.
Embodiment 4
A kind of high vanadium alloy carbide additive of the present embodiment, it is substantially the same manner as Example 1, the difference is that,
It is formed by the component of following weight percent: 55% chromium carbide, 41% molybdenum carbide, 4% niobium carbide.The difference of preparation method
It is in in the granulation of step S1 powder mixing and ball milling: being added in ball grinder after chromium carbide, molybdenum carbide, niobium carbide are mixed, ball
Grind ratio of grinding media to material be 1.5, Ball-milling Time 18 hours；After the completion of ball milling, the dosage for adding granulating agent is the quality hundred of carbide slurry
Divide than being 20%；In the sintering of step S2 carbide additive: the heating rate for the heat-agglomerating that heats up is 15 DEG C/min,
1.2h is kept the temperature at 600 DEG C and carries out dumping, in 1600 DEG C of heat preservation 2h.Resulting high vanadium alloy carbide additive agent powder is pressed
Mixing and ball milling granulation in high vanadium alloy powder is added in 5% mass percent, and then green compact is sintered, and high vanadium alloy can be made to be sintered
When densification, matrix grain is not grown up, and high vanadium alloy powder grain can be prevented to grow up, and is extended sintering range, is mentioned
Increase the intensity and hardness of vanadium alloy.
According to the disclosure and teachings of the above specification, those skilled in the art in the invention can also be to above-mentioned embodiment party
Formula is changed and is modified.Therefore, the invention is not limited to the specific embodiments disclosed and described above, to the one of invention
A little modifications and changes should also be as falling into scope of protection of the claims of the invention.
Claims (10)
1. a kind of high vanadium alloy carbide additive, which is characterized in that formed by the component of following weight percent: 48-
55% chromium carbide, 40-45% molybdenum carbide, 4-8% niobium carbide.
2. a kind of high vanadium alloy carbide additive, which is characterized in that formed by the component of following weight percent: 50% carbon
Change chromium, 45% molybdenum carbide, 5% niobium carbide.
3. a kind of high vanadium alloy carbide additive, which is characterized in that formed by the component of following weight percent: 52% carbon
Change chromium, 42% molybdenum carbide, 6% niobium carbide.
4. high vanadium alloy carbide additive a method according to any one of claims 1-3, which is characterized in that the chromium carbide,
Molybdenum carbide, niobium carbide purity 99% or more.
5. high vanadium alloy carbide additive a method according to any one of claims 1-3, which is characterized in that the chromium carbide,
Molybdenum carbide, niobium carbide partial size be 4~8 μm.
6. a kind of preparation method of high vanadium alloy carbide additive, which comprises the following steps:
S1: being added in ball grinder after chromium carbide, molybdenum carbide, niobium carbide are mixed, and dehydrated alcohol is added in ball grinder and submerges ball
Ball grinder is covered and carries out ball milling after vacuumizing by material, after the completion of ball milling, is taken out slurry and is sifted out abrading-ball, later in carbide slurry
Middle addition granulating agent carries out inserting sieve granulation, obtains mixed carbide particle；
S2: mixed carbide particle is sintered in the crystal vessel of vacuum resistance sintering furnace, is evacuated down to 10Pa, later
Heat up heat-agglomerating, keeps the temperature dumping, and furnace cooling later obtains high vanadium alloy carbide additive.
7. the preparation method of high vanadium alloy carbide additive as claimed in claim 6, which is characterized in that in the step S1
Ball milling ball use sintered carbide ball, ball milling ratio of grinding media to material be 1:1-1.5, Ball-milling Time 18-22 hours；The granulating agent is liquid
Paraffin, dosage are that the mass percent of carbide slurry is 20-30%；The partial size of gained mixed carbide particle is 120~150
Micron.
8. the preparation method of high vanadium alloy carbide additive as claimed in claim 6, which is characterized in that the step S2 liter
Warm heat-agglomerating: heating rate is 10-15 DEG C/min, and 1-1.5h is kept the temperature at 600-700 DEG C and carries out dumping, in 1600-1700
DEG C heat preservation 2-3h.
9. the preparation method of high vanadium alloy carbide additive as claimed in claim 6, which is characterized in that resulting high vanadium alloy
The partial size of steel carbide additive is 100-150 microns.
10. a kind of application of high vanadium alloy carbide additive, which is characterized in that the high vanadium alloy carbide additive adds
It is added in high vanadium alloy powder and carries out mixing and ball milling granulation and green compact sintering, high vanadium alloy powder grain can be prevented long
Greatly, sintering range is extended.
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Cited By (1)
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| CN115740429A (en) * | 2022-10-31 | 2023-03-07 | 成都美奢锐新材料有限公司 | Raw material powder for preparing hard alloy, hard alloy and preparation method thereof |
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Effective date of registration: 20230109 Address after: 425000 No. 8, Jinyang Road, Nanyuan, Longquan Street Industrial Park, Xintian County, Yongzhou City, Hunan Province Patentee after: Hunan New Yutian New Material Co.,Ltd. Address before: 523000 Factory Building of Tiantou Village, Hengli Town, Dongguan City, Guangdong Province Patentee before: DONGGUAN YU TIAN NEW MATERIALS CO.,LTD. |