CN107584439B - A kind of preparation method of Nano diamond grinding tool - Google Patents
A kind of preparation method of Nano diamond grinding tool Download PDFInfo
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- CN107584439B CN107584439B CN201710977505.7A CN201710977505A CN107584439B CN 107584439 B CN107584439 B CN 107584439B CN 201710977505 A CN201710977505 A CN 201710977505A CN 107584439 B CN107584439 B CN 107584439B
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Abstract
The invention discloses a kind of preparation methods of Nano diamond grinding tool, belong to polishing material technical field.Polyallylamine is mixed with Nano diamond powder, and sequentially adds aluminum nitrate, magnesium nitrate, ferric nitrate, dispersing agent and water are stirred, obtain preconditioned mixture, by preconditioned mixture sonic oscillation, and is passed through carbon dioxide, obtains mixture；After mixture is mixed with saturation sodium silicate solution, stand, after being heat-treated under conditions of being 100~120 DEG C in temperature, freeze-drying, blank must be pre-processed, by pretreatment blank under conditions of temperature is 155~190 DEG C, heat treatment, it crushes, sieving obtains mixed powder；It after mixed powder is mixed with temporary binders, moves into mold, and mold is moved into sintering furnace, sintering, after cooling to room temperature with the furnace, discharging obtains Nano diamond grinding tool.Diamond abrasive tool prepared by the present invention has good mechanical property.
Description
Technical field
The invention discloses a kind of preparation methods of Nano diamond grinding tool, belong to polishing material technical field.
Background technique
With the development of science and technology modern processing is just towards high speed, efficient, high-accuracy, high automation and low cost side
To development, just to process equipment and machining tool, more stringent requirements are proposed for this.Compared with conventional abrasive material grinding tool, vitrified bond
The grinding capacity of diamond abrasive tool is strong, and grinding temperature is low, and grinding tool durability is high；The shape retention of grinding tool is good when grinding, processing
The dimensional accuracy of part is high；Grinding tool self-sharpening is good, and finishing interval time is long, and finishing is also easier；Be not easy to plug when grinding,
It is not easy workpiece of burning, it can be cooling with various coolant liquids.Therefore, in the grinding field of material, ceramic bond diamond
Grinding tool has the advantage being more and more obvious.But vitrified bond brittleness is larger, poor toughness, and to diamond wetability difference etc.
Disadvantage constrains it and is preparing the application in diamond tool.Therefore suitable metal or alloy is added into vitrified bond to mention
High vitrified bond performance and improvement are necessary to diamond wetability.
Low-temperature vitrified bond is the important component for preparing high-performance ceramic binder diamond grinding tool, and performance is straight
Connect the comprehensive performance for affecting diamond abrasive tool.The Essential Performance Requirements of diamond abrasive tool vitrified bond, intensity is high, softening
Melting temperature is low, and thermal expansion coefficient is small, and wettability is good under high temperature.In addition, wearability is good since diamond abrasive grain hardness is high,
And most of diamond abrasive tools are all to use under relatively high rotational speed with vitrified bond, in order to guarantee that abrasive grain can fill
Its grindability is waved in distribution, it is desirable that diamond abrasive tool vitrified bond must have higher intensity.In recent years, with powder technology
Development, more and more nanometer additives are applied in vitrified bond, and obtain preferable research achievement.
Therefore, how to improve the bad disadvantage of traditional diamond abrasive tool mechanical property, to obtain the gold of more high combination property
Hard rock grinding tool is that it is promoted and is applied to broader field, meets industrial production demand urgent problem to be solved.
Summary of the invention
The present invention solves the technical problem of: for the bad disadvantage of traditional diamond abrasive tool mechanical property, provide
A kind of preparation method of Nano diamond grinding tool.
In order to solve the above-mentioned technical problem, the technical scheme adopted by the invention is that:
(1) polyallylamine is mixed with Nano diamond powder 1:2~1:3 in mass ratio, and sequentially adds a nanometer Buddha's warrior attendant
The aluminum nitrate that 0.08~0.12 times of stone powder quality, the magnesium nitrate of 0.07~0.10 times of Nano diamond powder quality, nanogold
The ferric nitrate that 0.01~0.03 times of hard rock powder quality, the dispersing agent and nanometer of 0.01~0.02 times of Nano diamond powder quality
The water that 10~12 times of diamond dust quality, is stirred, and obtains preconditioned mixture, by preconditioned mixture sonic oscillation, and
It is passed through carbon dioxide, obtains mixture；
(2) mixture after 1:1~1:2 mix in mass ratio, is stood with saturation sodium silicate solution, in temperature for 100~
Under conditions of 120 DEG C carry out the pre-heat treatment after, freeze-drying, obtain pretreatment blank, will pretreatment blank in temperature be 155~
It under conditions of 190 DEG C, after heat treatment, crushes, sieving obtains mixed powder；
(3) mixed powder is mixed with temporary binders 5:1~10:1 in mass ratio, obtains blank, blank is moved into mold
In, and mold is moved into sintering furnace, sintering, after cooling to room temperature with the furnace, discharging obtains Nano diamond grinding tool.
Step (1) dispersing agent is dispersing agent NNO, any one in dispersing agent 5040 or Dispersant MF.
The preparation method of step (2) the saturation sodium silicate solution is to add water in beaker, 50 DEG C is heated to, to beaker
Middle addition sodium metasilicate filters until there is crystal precipitation, obtains filtrate to get saturation sodium silicate solution.
Step (3) temporary binders are peach gum, any one in Arabic gum or coal tar.
Step (3) sintering condition be prior to 500~600 DEG C under conditions of be sintered 2.0~2.5h, be then at temperature
1.5~2.5h is sintered under conditions of 800~1000 DEG C.
The beneficial effects of the present invention are:
(1) polyallylamine and saturation sodium silicate solution, first polyene are added when preparing Nano diamond grinding tool by the present invention
Propylamine can form cross-linked network under the action of carbon dioxide, make the Nano diamond powder in raw material, aluminum nitrate, magnesium nitrate and
Ferric nitrate may be homogenously dispersed in system, to keep each powder in mixed powder evenly dispersed, and then make the mechanical property of product
It is improved, on the one hand system pH is adjusted in the saturation sodium silicate solution being secondly added, make aluminum nitrate, magnesium nitrate and ferric nitrate can
It to be precipitated in the form of hydroxide, and is dispersed in system, in subsequent processes, hydroxide can be changed into oxygen
Change aluminium, magnesia and iron oxide are uniformly mixed with Nano diamond powder, so that it is improved the mechanical property of product, it is another
Aspect, in subsequent heat processing, polyallylamine can discharge carbon dioxide, and polyallylamine cross-linking system disappears, and is saturated silicic acid
Sodium solution can react to form silicic acid with the carbon dioxide of release, and form colloidal sol, make Nano diamond powder, hydroxide
Aluminium, magnesium hydroxide and iron hydroxide can continue to be scattered in system, so that the uniformity of mixed-powder be made to be improved, and then make
The mechanical property of product is improved；
(2) polyallylamine and saturation sodium silicate solution, polyallylamine are added when preparing Nano diamond grinding tool by the present invention
The gel that absorbing carbon dioxide is formed can adsorb immediately when aluminum nitrate, magnesium nitrate and ferric nitrate form hydroxide precipitating, from
And reduce the partial size of hydroxide precipitating, it is saturated sodium metasilicate absorbing carbon dioxide, colloidal sol is generated, can effectively avoid subsequent processing mistake
The reunion of metal oxide in journey, so that each powder be made in mixed powder to keep compared with small particle, there is contact site between powder
Effect keeps and is uniformly mixed, and then is improved the mechanical property of product.
Specific embodiment
Polyallylamine and Nano diamond powder 1:2~1:3 in mass ratio are mixed in beaker, and successively into beaker
The aluminum nitrate of 0.08~0.12 times of Nano diamond powder quality, the nitre of 0.07~0.10 times of Nano diamond powder quality is added
Sour magnesium, the ferric nitrate of 0.01~0.03 times of Nano diamond powder quality, 0.01~0.02 times of Nano diamond powder quality
The water of 10~12 times of dispersing agent and Nano diamond powder quality tests the speed beaker immigration digital display constant temperature blender with magnetic force, Yu Wen
Degree is 45~55 DEG C, and under conditions of revolving speed is 180~220r/min, constant temperature is stirred 30~50min, must pre-process mixing
Beaker is moved into sonic oscillation instrument, and is passed through carbon dioxide into beaker with the rate of 10~15mL/min by object, in frequency be 45
Under conditions of~55kHz, 15~25min of sonic oscillation obtains mixture；By mixture and saturation sodium silicate solution 1:1 in mass ratio
~1:2 is mixed in flask, and under conditions of temperature is 30~45 DEG C, after standing 30~40min, material in flask is heated,
Under conditions of temperature is 100~120 DEG C, 45~55min of the pre-heat treatment obtains the pre-heat treatment mixture, the pre-heat treatment is mixed
Material freeze-drying, obtains pretreatment blank, will pre-process blank heating, heats 70 under conditions of being 155~190 DEG C in temperature
After~90min, the pretreatment blank after heating is moved into pulverizer and is crushed, crossed 100~120 meshes, obtain mixed powder；It will mix
It closes powder to mix with temporary binders 5:1~10:1 in mass ratio, is 30~40 DEG C in temperature, revolving speed is 200~250r/min
Under conditions of, it is stirred 20~30min, obtains blank, blank is moved into mold, and mold is moved into sintering furnace, prior to
Temperature be 500~600 DEG C under conditions of be sintered 2.0~2.5h, then at temperature be 800~1000 DEG C under conditions of sintering 1.5~
2.5h, after cooling to room temperature with the furnace, discharging obtains Nano diamond grinding tool.The dispersing agent is dispersing agent NNO, dispersing agent 5040
Or any one in Dispersant MF.The preparation method of the saturation sodium silicate solution is to add water in beaker, is heated to 50 DEG C,
Sodium metasilicate is added into beaker, until there is crystal precipitation, filters, obtains filtrate to get saturation sodium silicate solution.The temporary adhesion
Agent is peach gum, any one in Arabic gum or coal tar.
Example 1
Polyallylamine and Nano diamond powder 1:3 in mass ratio are mixed in beaker, and sequentially added into beaker
The aluminum nitrate of 0.12 times of Nano diamond powder quality, the magnesium nitrate of 0.10 times of Nano diamond powder quality, Nano diamond
The ferric nitrate that 0.03 times of powder quality, the dispersing agent and Nano diamond powder quality 12 of 0.02 times of Nano diamond powder quality
Times water, beaker immigration digital display is tested the speed constant temperature blender with magnetic force, in temperature be 55 DEG C, under conditions of revolving speed is 220r/min,
Constant temperature is stirred 50min, obtains preconditioned mixture, beaker is moved into sonic oscillation instrument, and into beaker with 15mL/min's
Rate is passed through carbon dioxide, and under conditions of frequency is 55kHz, sonic oscillation 25min obtains mixture；By mixture and saturation
Sodium silicate solution 1:2 in mass ratio is mixed in flask, under conditions of temperature is 45 DEG C, after standing 40min, by material in flask
Heating, under conditions of temperature is 120 DEG C, the pre-heat treatment 55min obtains the pre-heat treatment mixture, by the pre-heat treatment mixture cold
It is lyophilized dry, obtains pretreatment blank, blank heating will be pre-processed, it, will after heating 90min under conditions of being 190 DEG C in temperature
Pretreatment blank after heating, which moves into pulverizer, to be crushed, and is crossed 120 meshes, is obtained mixed powder；By mixed powder and temporary adhesion
Agent 10:1 in mass ratio is mixed, and is 40 DEG C in temperature, under conditions of revolving speed is 250r/min, is stirred 30min, obtains blank,
Blank is moved into mold, and mold is moved into sintering furnace, 2.5h is sintered under conditions of being 600 DEG C prior to temperature, then at temperature
Degree is sintered 2.5h under conditions of being 1000 DEG C, and after cooling to room temperature with the furnace, discharging obtains Nano diamond grinding tool.The dispersing agent
For dispersing agent NNO.The preparation method of the saturation sodium silicate solution is to add water in beaker, 50 DEG C is heated to, into beaker
Sodium metasilicate is added, until there is crystal precipitation, filters, obtains filtrate to get saturation sodium silicate solution.The temporary binders are peach
Glue.
Example 2
Nano diamond powder is added in beaker, and sequentially adds 0.12 times of Nano diamond powder quality into beaker
Aluminum nitrate, the magnesium nitrate of 0.10 times of Nano diamond powder quality, the ferric nitrate of 0.03 times of Nano diamond powder quality receives
0.02 times of quality of diamond dust of dispersing agent of rice and the water of 12 times of Nano diamond powder quality test the speed beaker immigration digital display
Constant temperature blender with magnetic force is 55 DEG C in temperature, and under conditions of revolving speed is 220r/min, constant temperature is stirred 50min, must pre-process
Beaker is moved into sonic oscillation instrument, and is passed through carbon dioxide into beaker with the rate of 15mL/min by mixture, is in frequency
Under conditions of 55kHz, sonic oscillation 25min obtains mixture；Mixture and saturation sodium silicate solution 1:2 in mass ratio are mixed in
In flask, under conditions of temperature is 45 DEG C, after standing 40min, material in flask is heated, the condition for being 120 DEG C in temperature
Under, the pre-heat treatment 55min obtains the pre-heat treatment mixture, and the pre-heat treatment mixture is freeze-dried, and obtains pretreatment blank, will be pre-
Blank heating is handled, after heating 90min under conditions of being 190 DEG C in temperature, the pretreatment blank after heating is moved into powder
It is crushed in broken machine, crosses 120 meshes, obtain mixed powder；Mixed powder is mixed with temporary binders 10:1 in mass ratio, Yu Wendu
It is 40 DEG C, under conditions of revolving speed is 250r/min, is stirred 30min, obtains blank, blank is moved into mold, and by mold
Move into sintering furnace in, prior to temperature be 600 DEG C under conditions of be sintered 2.5h, then at temperature be 1000 DEG C under conditions of be sintered
2.5h, after cooling to room temperature with the furnace, discharging obtains Nano diamond grinding tool.The dispersing agent is dispersing agent NNO.The saturation silicon
The preparation method of acid sodium solution is to add water in beaker, is heated to 50 DEG C, sodium metasilicate is added into beaker, until there is crystal analysis
Out, it filters, obtains filtrate to get saturation sodium silicate solution.The temporary binders are peach gum.
Example 3
Polyallylamine and Nano diamond powder 1:3 in mass ratio are mixed in beaker, and sequentially added into beaker
The aluminum nitrate of 0.12 times of Nano diamond powder quality, the magnesium nitrate of 0.10 times of Nano diamond powder quality, Nano diamond
The ferric nitrate that 0.03 times of powder quality, the dispersing agent and Nano diamond powder quality 12 of 0.02 times of Nano diamond powder quality
Times water, beaker immigration digital display is tested the speed constant temperature blender with magnetic force, in temperature be 55 DEG C, under conditions of revolving speed is 220r/min,
Constant temperature is stirred 50min, obtains preconditioned mixture, beaker is moved into sonic oscillation instrument, and into beaker with 15mL/min's
Rate is passed through carbon dioxide, and under conditions of frequency is 55kHz, sonic oscillation 25min obtains mixture；Mixture freezing is dry
It is dry, pretreatment blank is obtained, blank heating will be pre-processed, after heating 90min under conditions of being 190 DEG C in temperature, will be heated
Pretreatment blank afterwards is moved into pulverizer and is crushed, and is crossed 120 meshes, is obtained mixed powder；Mixed powder and temporary binders are pressed
Mass ratio 10:1 mixing is 40 DEG C in temperature, under conditions of revolving speed is 250r/min, is stirred 30min, obtains blank, by base
Material moves into mold, and mold is moved into sintering furnace, is sintered 2.5h under conditions of being 600 DEG C prior to temperature, is then at temperature
It is sintered 2.5h under conditions of 1000 DEG C, after cooling to room temperature with the furnace, discharging obtains Nano diamond grinding tool.The dispersing agent is point
Powder NNO.The temporary binders are peach gum.
Comparative example: the skive of Shanghai City grinding tool Co., Ltd production.
The resulting Nano diamond grinding tool of example 1 to 3 and comparative example product are subjected to performance detection, specific detection method is such as
Under:
Mechanical property: bending strength is measured in CMCT-4303 type electronic universal tester using three-point bending method；In HR-
150A Rockwell apparatus measures the hardness of sample, executes by GB/T2491.
Specific testing result is as shown in table 1:
Table 1
| Detection project | Example 1 | Example 2 | Example 3 | Comparative example |
| Bending strength/MPa | 83.54 | 70.28 | 78.34 | 45.67 |
| Hardness/HRC | 98.3 | 82.5 | 76.7 | 55.4 |
By 1 testing result of table it is found that the Nano diamond grinding tool of technical solution of the present invention preparation has excellent mechanical property
It the characteristics of energy, has broad prospects in the development of grinding tool industry.
Claims (5)
1. a kind of preparation method of Nano diamond grinding tool, it is characterised in that specific preparation step are as follows:
(1) polyallylamine is mixed with Nano diamond powder 1:2~1:3 in mass ratio, and sequentially adds nano-diamond powder
The aluminum nitrate of 0.08~0.12 times of last quality, the magnesium nitrate of 0.07~0.10 times of Nano diamond powder quality, Nano diamond
The ferric nitrate that 0.01~0.03 times of powder quality, the dispersing agent and nanometer Buddha's warrior attendant of 0.01~0.02 times of Nano diamond powder quality
The water that 10~12 times of stone powder quality, is stirred, and obtains preconditioned mixture, by preconditioned mixture sonic oscillation, and is passed through
Carbon dioxide obtains mixture；
(2) mixture after 1:1~1:2 mix in mass ratio, is stood with saturation sodium silicate solution, in temperature be 100~120 DEG C
Under conditions of carry out the pre-heat treatment after, freeze-drying obtains pretreatment blank, will pre-process blank in temperature be 155~190 DEG C
Under the conditions of, it after heat treatment, crushes, sieving obtains mixed powder；
(3) mixed powder is mixed with temporary binders 5:1~10:1 in mass ratio, obtains blank, blank is moved into mold, and
Mold is moved into sintering furnace, sintering, after cooling to room temperature with the furnace, discharging obtains Nano diamond grinding tool.
2. the preparation method of Nano diamond grinding tool according to claim 1, it is characterised in that: step (1) described dispersing agent
For dispersing agent NNO, any one in dispersing agent 5040 or Dispersant MF.
3. the preparation method of Nano diamond grinding tool according to claim 1, it is characterised in that: step (2) the saturation silicon
The preparation method of acid sodium solution is to add water in beaker, is heated to 50 DEG C, sodium metasilicate is added into beaker, until there is crystal analysis
Out, it filters, obtains filtrate to get saturation sodium silicate solution.
4. the preparation method of Nano diamond grinding tool according to claim 1, it is characterised in that: step (3) is described interim viscous
Knot agent is peach gum, any one in Arabic gum or coal tar.
5. the preparation method of Nano diamond grinding tool according to claim 1, it is characterised in that: step (3) described sintered bar
Part be prior to 500~600 DEG C under conditions of be sintered 2.0~2.5h, then at temperature be 800~1000 DEG C under conditions of be sintered 1.5
~2.5h.
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| CN110653370B (en) * | 2019-09-12 | 2021-05-04 | 厦门高时实业有限公司 | Preparation method of diamond wire saw bead based on bimetal powder injection molding |
| CN112476256B (en) * | 2020-11-26 | 2022-06-14 | 湖南省方圆磨料磨具有限公司 | Method for manufacturing composite binder grinding wheel |
| CN113999617A (en) * | 2021-11-20 | 2022-02-01 | 河南工业大学 | Method for preparing inorganic heat-conducting glue by using etched diamond micro powder as filler |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1774488A (en) * | 2003-04-17 | 2006-05-17 | 3M创新有限公司 | Abrasive particles, abrasive articles, and methods of making and using the same |
| CN103831743A (en) * | 2014-02-11 | 2014-06-04 | 当涂县南方红月磨具磨料有限公司 | Diamond grinding wheel containing poly aluminum chloride |
| US9511575B2 (en) * | 2010-11-17 | 2016-12-06 | Brigham Young University | Sonication for improved particle size distribution of core-shell particles |
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| US6616725B2 (en) * | 2001-08-21 | 2003-09-09 | Hyun Sam Cho | Self-grown monopoly compact grit |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1774488A (en) * | 2003-04-17 | 2006-05-17 | 3M创新有限公司 | Abrasive particles, abrasive articles, and methods of making and using the same |
| US9511575B2 (en) * | 2010-11-17 | 2016-12-06 | Brigham Young University | Sonication for improved particle size distribution of core-shell particles |
| CN103831743A (en) * | 2014-02-11 | 2014-06-04 | 当涂县南方红月磨具磨料有限公司 | Diamond grinding wheel containing poly aluminum chloride |
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