CN103395009A - Ceramic hollow sphere multi-layer brazed diamond block and manufacturing method thereof - Google Patents
Ceramic hollow sphere multi-layer brazed diamond block and manufacturing method thereof Download PDFInfo
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- CN103395009A CN103395009A CN2013102841558A CN201310284155A CN103395009A CN 103395009 A CN103395009 A CN 103395009A CN 2013102841558 A CN2013102841558 A CN 2013102841558A CN 201310284155 A CN201310284155 A CN 201310284155A CN 103395009 A CN103395009 A CN 103395009A
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Abstract
A ceramic hollow sphere multi-layer brazed diamond block is characterized in that the diamond block comprises, by mass, 12-20% of diamond abrasive particles, 2-4% of nickel plating graphite particles, 7-20% of ceramic hollow spheres, and the balance nickel base alloy comprising chromium, and the melting point of the nickel base alloy comprising chromium is lower than 1000 DEG C. Compared with a traditional sintered diamond tool, the ceramic hollow sphere multi-layer brazed diamond block has the advantages that due to the adoption of the brazing method with active filler metal Ni-Cr-Cu-B-Si or Ni-Cr-P used, chromium carbide is formed at the interface of diamond, and holding strength of the diamond is greatly improved; the nickel plating ceramic hollow spheres are added and the nickel plating enables chemical metallurgical bonding to be achieved between the ceramic hollow spheres and the brazing filler metal, therefore, requirements of a grinding wheel on the gas hole ratio are met, and gas holes are spherical; the adding of the ceramic hollow spheres enables the diamond block to have certain brittleness, and self-sharpening of the diamond block is facilitated; the added graphite can improve lubricity and reduce heat injury of the diamond; due to the fact that copper is added to Ni-Cr-B-Si, the heat injury of the diamond is further reduced.
Description
Technical field
The invention belongs to the super hard abrasive instrument and manufacture field, relate to a kind of manufacturing technology of ceramic hollow ball multi-layered brazing diamond block.
Background technology
Along with the development of science and technology, the preliminary working of the hard brittle materials such as pottery, silicon materials, optical glass, high-efficiency high-accuracy processing get more and more, and diamond tool is often adopted in the cutting of above-mentioned material, grinding.At present, diamond tool is mainly by technique manufactures such as sintering, plating, and to control intensity lower but sintering, plating diamond tool are due to diamond abrasive grain, the phenomenon of Grain Falling Off often occurs.In recent years, adopt Ni-Cr-B-Si, Ag-Cu-Ti solder brazing technology to make diamond and metallic matrix by diffusion, dissolving, combination reaction etc., improve both bonding strengths both at home and abroad, the soldering mono-layer diamond tool have abrasive hardness high, control that intensity is high, the abrasive material exposure is high, the working (machining) efficiency advantages of higher, therefore brazed diamond tool has solved the shortcoming of plating diamond tool to a certain extent, but brazed diamond tool only has the individual layer abrasive material, so is subject to its service life limiting.In addition, brazing process often causes the fire damage that diamond is larger.
Although the conventional sintering metal bonding agent extra hard material grinding wheel is the multi-player super-hard material product, be mostly compact-type, grit protrusion difficulty in emery wheel, therefore often adopt the way that carcass is weakened to improve the sword rate, but cause abrasive particle to control the decline of intensity, easily come off.In addition, at the beginning of using and after wearing and tearing, usually cause shaping and the dressing difficulty of instrument.Adopt the Ni-Cr-B-Si alloy to manufacture the multi-layered brazing skive, though be conducive to improve the adamantine intensity of controlling, the high strength of Ni-Cr-B-Si alloy, high rigidity, make it go out sword more difficult.Attempt exploitation porous metal binding agent emery wheel both at home and abroad, the pore creating material that uses mainly contains inorganic compound, solubility salt, as urea, carbonic hydroammonium, sodium chloride, sodium carbonate etc., wherein carbonic hydroammonium, urea etc. produce hole by the volatilization of gas in the hot pressed sintering process, compressed with the space that prevents, be difficult to improve the intensity of emery wheel; And the solubility salt materials such as sodium chloride are while making pore creating material, and the emery wheel goods that it prepares easily absorb water and affect quality.This kind emery wheel is incorporated into the pore structure of porous bond in metallic bond and goes, by this porous metal binding agent emery wheel manufacturing process, porosity controlling research are found, greatly improve the drawback that traditional metal bond abrasive particle is difficult for sword, repairs difficulty, reduced the clogging in wheel grinding processing.But because the pore structure in emery wheel has reduced the control intensity of metallic bond to abrasive particle, the intensity of joint piece itself also descends, and causes the inefficacy that easily comes off of abrasive particle work in-process, the useful life reduction.
Summary of the invention
The present invention wants the technical solution problem to be, at Ni-Cr-B-Si alloy brazed diamond, realizing that diamond is high controls on the intensity basis, ceramic hollow ball is introduced in the multi-layered brazing diamond tool, realized chip space that diamond exposure is high, larger, the higher intensity of controlling; But the Ni-Cr-B-Si alloy is to ceramic hollow ball, and its wetability is poor, takes ceramic hollow ball is carried out to chemical nickel plating, after surface metalation, then carries out the ceramic hollow ball multi-layered brazing diamond block that the way of multi-layered brazing is made.In addition, considering that at first Cu and Ni element infinitely dissolve each other in liquid state, is secondly non-catalyst element for diamond, and the plasticity of last Cu is better, therefore in Ni-Cr-B-Si, adds 3-6%(wt) Cu, be conducive to reduce adamantine fire damage.Adding a certain amount of graphite can reduce adamantine fire damage and increase lubricity.
In order to address the above problem by the following technical solutions: a kind of ceramic hollow ball multi-layered brazing diamond block, it is characterized in that, by following raw material, according to mass percentage content, be prepared from: the diamond abrasive grain of 12%-20%, the nickel plating graphite granule of 2-4%, the ceramic hollow ball of 7-20%, surplus is the nickel-base alloy that contains Cr, contains the fusing point of nickel-base alloy of Cr lower than 1000 ℃.
Described diamond abrasive grain particle diameter is 100-300 μ m; Nickel plating graphite granule particle diameter is 30-50 μ m; Ceramic hollow ball is aluminium oxide or zirconia particles, and particle diameter is 100-120 μ m; The nickel-base alloy that contains Cr is Ni-Cr-Cu-B-Si or Ni-Cr-P, and particle diameter is 20-50 μ m.
Described ceramic hollow ball chemical nickel plating on surface, nickel layer thickness are 20 ~ 80 μ m.
Cr content in the described nickel-base alloy that contains Cr > 12wt%.
Preparation method is as follows:
(1) using the ceramic hollow ball chemical nickel plating as the pore-creating material, with diamond abrasive grain, the nickel-base alloy that contains Cr, nickel plating graphite granule, carry out mechanical mixture, add polyvinyl alcohol, and be pressed into the joint piece;
(2) by above-mentioned joint piece at heating-up temperature 900-1060 ℃, temperature retention time 10-30min, in vacuum, be 10
-2In the vacuum drying oven of Pa, heat the high-temperature liquid-phase soldering, impel diamond abrasive grain, nickel plating graphite granule, ceramic hollow ball that chemical metallurgy occurs respectively between the nickel-base alloy that contains Cr and be combined, make the ceramic hollow ball multi-layered brazing skive with high porosity and high-strength characteristic.
Beneficial effect of the present invention: at first, with the conventional sintering diamond tool, compare, due to the method that has adopted active solder Ni-Cr-Cu-B-Si or Ni-Cr-P soldering, at the diamond interface place, form the carbide of Cr, it is controlled intensity and significantly improves, and next adds the ceramic hollow ball of nickel plating, and nickel plating makes ceramic hollow ball between solder, also form chemical metallurgy and is combined, not only met the requirement of emery wheel to the porosity, and pore is spherical.In addition, adding of ceramic hollow ball, make the joint piece that certain fragility be arranged, and is conducive to save the self-sharpening of piece.The graphite that adds can increase lubricity and reduce adamantine fire damage, in Ni-Cr-B-Si, adds Cu and is conducive to reduce adamantine fire damage.
The specific embodiment
Embodiment 1: a kind of ceramic hollow ball multi-layered brazing diamond block is prepared from according to mass percentage content by following raw material: select 18% diamond abrasive grain, particle diameter is approximately 260-350 μ m; 2.5% nickel plating graphite granule, its particle diameter are 30-50 μ m; 10% aluminium oxide ceramics hollow ball, diameter are 100-120 μ m, chemical nickel plating on surface, thick 50 μ m; Surplus is the Ni-Cr-Cu-B-Si alloy powder, and the content of its component is: 1.6%B, and 3.2%Si, 16%Cr, 4%Cu, surplus is Ni.Above-mentioned powder is mixed, then described mixed-powder is added to 5%(wt) polyvinyl alcohol, by certain mass, be seated in cold-press moulding in mould, powder forming pressure is 15-20MPa, pressurize 3min, joint piece size is determined size according to the requirement of emery wheel.
It is 10 that above-mentioned joint piece is put into to vacuum
-2In the vacuum drying oven of Pa, heat the high-temperature liquid-phase soldering, at 1050 ℃ of temperature retention time 10min, then cooling with stove, to below 100 ℃, taking out, chemical metallurgy occurs respectively and is combined in diamond abrasive grain, graphite granule, aluminium oxide ceramics hollow ball particle between the Ni-Cr-Cu-B-Si solder in brazing process, makes the ceramic hollow ball multi-layered brazing diamond block with high porosity and high-strength characteristic.
Embodiment 2: a kind of ceramic hollow ball multi-layered brazing diamond block, by following raw material, according to mass percentage content, be prepared from: select 15% diamond abrasive grain, particle diameter is approximately 200-360 μ m, 3% nickel plating graphite granule, its particle diameter is 30-50 μ m, and 15% aluminium oxide ceramics hollow ball, diameter are 100-120 μ m, chemical nickel plating on surface, thick 50 μ m; Surplus is the Ni-Cr-Cu-B-Si alloy, and the content of its component is: 3.6%B, and 4.2%Si, 16%Cr, 3%Cu, surplus is Ni.Above-mentioned powder is mixed, then described mixed-powder is added to 3%(wt) polyvinyl alcohol, by certain mass, be seated in cold-press moulding in mould, powder forming pressure is 20-25MPa, pressurize 3min, joint piece size is determined size according to the requirement of emery wheel.
It is 10 that above-mentioned joint piece is put into to vacuum
-2In the vacuum drying oven of Pa, heat the high-temperature liquid-phase soldering, at 1050 ℃ of insulation 8min, then cooling with stove, to below 100 ℃, taking out, at holding stage diamond abrasive grain, graphite granule, aluminium oxide ceramics hollow ball particle, chemical metallurgy occurring respectively between the Ni-Cr-Cu-B-Si solder and be combined, makes the ceramic hollow ball multi-layered brazing diamond block with high porosity and high-strength characteristic.
Embodiment 3: a kind of ceramic hollow ball multi-layered brazing diamond block, by following raw material, according to mass percentage content, be prepared from: select 16% diamond abrasive grain, particle diameter is approximately 200-320 μ m, 3.5% nickel plating graphite granule, its particle diameter is 30-50 μ m, and 17% aluminium oxide ceramics hollow ball, diameter are 100-120 μ m, chemical nickel plating on surface, thick 45 μ m; Surplus is the Ni-Cr-P alloy, and the content of its component is: 15(wt) %Cr, 10(wt) %P, 0.01(wt) %B, surplus is Ni.Above-mentioned powder is mixed, then described mixed-powder is seated in to cold-press moulding in mould by certain mass, powder forming pressure is 25-30MPa, pressurize 3min, and joint piece size is determined size according to the requirement of emery wheel.
By above-mentioned joint piece, at 980 ℃ of insulation 10min of temperature, in vacuum, be 10
-2In the vacuum drying oven of Pa, heat the high-temperature liquid-phase soldering, then cooling with stove, to below 100 ℃, taking out, high temperature brazing impels diamond abrasive grain, graphite granule, aluminium oxide ceramics hollow ball particle that chemical metallurgy occurs respectively between the Ni-Cr-P solder to be combined, and makes the ceramic hollow ball multi-layered brazing diamond block with high porosity and high-strength characteristic.
Embodiment 4: a kind of ceramic hollow ball multi-layered brazing diamond block is prepared from according to mass percentage content by following raw material: the diamond abrasive grain of 12%-20%, and the nickel plating graphite granule of 2-4%, the ceramic hollow ball of 7-20%, surplus is the nickel-base alloy that contains Cr.Its fusing point is lower than 1000 ℃.
Embodiment 5: a kind of ceramic hollow ball multi-layered brazing diamond block is prepared from according to mass percentage content by following raw material: the diamond abrasive grain of 12%-20%, and the nickel plating graphite granule of 2-4%, the ceramic hollow ball of 7-20%, surplus is the nickel-base alloy that contains Cr.Its fusing point is lower than 1000 ℃.
Wherein, the diamond abrasive grain particle diameter is 100-300 μ m; Nickel plating graphite granule particle diameter is 30-50 μ m; Ceramic hollow ball is aluminium oxide or zirconia particles, and particle diameter is 100-120 μ m, ceramic hollow ball chemical nickel plating on surface, thick 20 ~ 80 μ m; The nickel-base alloy that contains Cr is Ni-Cr-Cu-B-Si or Ni-Cr-P, and particle diameter is 20-50 μ m, Cr content > 12wt%.
Embodiment 6: a kind of preparation method of ceramic hollow ball multi-layered brazing diamond block, (1) using the ceramic hollow ball chemical nickel plating as the pore-creating material, with diamond abrasive grain, the nickel-base alloy that contains Cr, nickel plating graphite granule, carry out mechanical mixture, add 2%(wt) polyvinyl alcohol, described 2% is 2% of mixed-powder gross mass.And be pressed into the joint piece;
(2) by above-mentioned joint piece at heating-up temperature 900-1060 ℃, temperature retention time 10-30min, in vacuum, be 10
-2In the vacuum drying oven of Pa, heat the high-temperature liquid-phase soldering, impel diamond abrasive grain, nickel plating graphite granule, ceramic hollow ball that chemical metallurgy occurs respectively between the nickel-base alloy that contains Cr and be combined, make the ceramic hollow ball multi-layered brazing skive with high porosity and high-strength characteristic.
Other are with embodiment 5.
Claims (5)
1. ceramic hollow ball multi-layered brazing diamond block, it is characterized in that, by following raw material, according to mass percentage content, be prepared from: the diamond abrasive grain of 12%-20%, the nickel plating graphite granule of 2-4%, the ceramic hollow ball of 7-20%, surplus is the nickel-base alloy that contains Cr, contains the fusing point of nickel-base alloy of Cr lower than 1000 ℃.
2. ceramic hollow ball multi-layered brazing diamond block according to claim 1, it is characterized in that: described diamond abrasive grain particle diameter is 100-300 μ m; Nickel plating graphite granule particle diameter is 30-50 μ m; Ceramic hollow ball is aluminium oxide or zirconia particles, and particle diameter is 100-120 μ m; The nickel-base alloy that contains Cr is Ni-Cr-Cu-B-Si or Ni-Cr-P, and particle diameter is 20-50 μ m.
3. ceramic hollow ball multi-layered brazing diamond block according to claim 1 and 2, it is characterized in that: described ceramic hollow ball chemical nickel plating on surface, nickel layer thickness are 20 ~ 80 μ m.
4. ceramic hollow ball multi-layered brazing diamond block according to claim 1 and 2, is characterized in that: Cr content in the nickel-base alloy of the described Cr of containing > 12wt%.
5. ceramic hollow ball multi-layered brazing diamond block according to claim 1 and 2, it is characterized in that, preparation method is as follows: (1) is using the ceramic hollow ball chemical nickel plating as the pore-creating material, with diamond abrasive grain, the nickel-base alloy that contains Cr, nickel plating graphite granule, carry out mechanical mixture, add polyvinyl alcohol, and be pressed into the joint piece;
(2) by above-mentioned joint piece at heating-up temperature 900-1060 ℃, temperature retention time 10-30min, in vacuum, be 10
-2In the vacuum drying oven of Pa, heat the high-temperature liquid-phase soldering, impel diamond abrasive grain, nickel plating graphite granule, ceramic hollow ball that chemical metallurgy occurs respectively between the nickel-base alloy that contains Cr and be combined, make the ceramic hollow ball multi-layered brazing skive with high porosity and high-strength characteristic.
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Cited By (7)
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| CN104373127A (en) * | 2014-10-23 | 2015-02-25 | 泉州华大超硬工具科技有限公司 | Novel diamond mine sawing block |
| CN106365661A (en) * | 2016-09-12 | 2017-02-01 | 中国科学院兰州化学物理研究所 | Multilayer-structure aluminum oxide composite ceramic and preparation method thereof |
| CN109590918A (en) * | 2019-01-09 | 2019-04-09 | 苏州科技大学 | A kind of method of amorphous CuNi based active solder brazed diamond tool |
| CN111203811A (en) * | 2020-03-18 | 2020-05-29 | 湖南科技大学 | Preparation and electrolytic finishing method of brazing grinding wheel with self-lubricating function and good electrolytic film forming property |
| CN111659317A (en) * | 2020-06-06 | 2020-09-15 | 南京惠诚工具制造有限公司 | Preparation method of self-sharpening superhard material accumulated abrasive |
| CN114193345A (en) * | 2021-12-22 | 2022-03-18 | 南京固华机电科技有限公司 | Novel abrasive group |
| US11478898B2 (en) | 2019-06-28 | 2022-10-25 | Saint-Gobain Abrasives, Inc. | Abrasive article and method of forming |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104373127A (en) * | 2014-10-23 | 2015-02-25 | 泉州华大超硬工具科技有限公司 | Novel diamond mine sawing block |
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| CN106365661B (en) * | 2016-09-12 | 2019-02-26 | 中国科学院兰州化学物理研究所 | A kind of multilayered structure alumina composite ceramic and preparation method thereof |
| CN109590918A (en) * | 2019-01-09 | 2019-04-09 | 苏州科技大学 | A kind of method of amorphous CuNi based active solder brazed diamond tool |
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| CN111203811A (en) * | 2020-03-18 | 2020-05-29 | 湖南科技大学 | Preparation and electrolytic finishing method of brazing grinding wheel with self-lubricating function and good electrolytic film forming property |
| CN111203811B (en) * | 2020-03-18 | 2022-02-22 | 湖南科技大学 | Preparation and electrolytic finishing method of brazing grinding wheel with self-lubricating function and good electrolytic film forming property |
| CN111659317A (en) * | 2020-06-06 | 2020-09-15 | 南京惠诚工具制造有限公司 | Preparation method of self-sharpening superhard material accumulated abrasive |
| CN114193345A (en) * | 2021-12-22 | 2022-03-18 | 南京固华机电科技有限公司 | Novel abrasive group |
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