CN102430849A - Method for preparing single-layer diamond by means of nickel-based brazing filler metal thermal spray-welding - Google Patents
Method for preparing single-layer diamond by means of nickel-based brazing filler metal thermal spray-welding Download PDFInfo
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- CN102430849A CN102430849A CN2011103545016A CN201110354501A CN102430849A CN 102430849 A CN102430849 A CN 102430849A CN 2011103545016 A CN2011103545016 A CN 2011103545016A CN 201110354501 A CN201110354501 A CN 201110354501A CN 102430849 A CN102430849 A CN 102430849A
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Abstract
A method for preparing a single-layer diamond tool by means of nickel-based brazing filler metal thermal spray-welding particularly includes (1) preparing a diamond tool base, (2) spray-welding high temperature brazing filler metal to the surface of the tool base, (3) adding diamond particles into the molten high temperature brazing filler metal, and (4) brazing the diamond tool. The diamond particles are added into the molten high temperature brazing filler metal by a mechanical method, thermal damage of the high temperature brazed diamond particles is decreased, and the diamond particles are chemically and metallurgically bonded with the brazing filler metal to achieve higher bonding strength, so that the performance of the diamond particles is made full use of. Compared with brazing in a common vacuum furnace, the method can be used for shortening heating and preparing time and improving tool production efficiency.
Description
Technical field
The invention belongs to the high temperature brazing technical field, be specifically related to the hot surfacing of a kind of nickel-based solder and prepare mono-layer diamond
The method of instrument, the instrument of preparation is fittedBe used for hard brittle material processing such as stone material, pottery, glass.
Background technology
Diamond has excellent properties such as the highest hardness, high-wearing feature, high-termal conductivity, low-friction coefficient, low thermal coefficient of expansion, is widely used in fields such as grinding, cutting and Precision Machining.
At present; Individual layer high temperature brazing diamond tool manufacture craft mainly relies on vacuum brazing to accomplish, but has following limitation in the vacuum brazing practical application: heating in the brazing process, cool time are long, cause the cycle of making production elongated; Time-consuming power consumption; Diamond abrasive grain is in for a long time and can makes abrasive particle receive bigger fire damage in the high-temperature liquid state solder, receives the furnace chamber size restrictions simultaneously, can't the large-scale instrument of soldering; The matrix distortion is bigger in heating process simultaneously, is unfavorable for improving machining accuracy.
Summary of the invention
The preparation method who the purpose of this invention is to provide the hot surfacing diamond tool of a kind of individual layer is to solve problems such as the braze cycle that exists in the vacuum brazing is long, the doctor distortion is bigger, size-constrained.
For realizing the foregoing invention purpose, the technical scheme that the present invention adopts is following:
The hot surfacing of employing nickel-based solder of the present invention prepares the method for mono-layer diamond tool, specifically comprises the steps:
(1) diamond tool matrix preparation:, select 45 according to the requirement of preparation diamond tool matrix
#Steel for the preparation diamond tool matrix, according to the diamond tool figure to 45
#Steel matrix is carried out the machining moulding, the surface that will carry out plasma spray is cleared up oil removing, processing of rust removing;
(2) the high-temp solder surfacing is surperficial to tool base: as to utilize the plasma spray welding machine to mono-layer diamond tool matrix surfacing molten state high-temp solder;
(3) in the molten state high-temp solder, add diamond particles: in tool base melt surface attitude high-temp solder, add diamond abrasive grain;
(4) brazed diamond tool: behind molten state high-temp solder and the diamond particles generation chemical reaction, rapid solidification forms mono-layer diamond tool in protective atmosphere.Diamond and liquid nickel-based solder diffuse to form chemical metallurgy each other in high temperature moment and combine, and the Cr element in the nickel-based solder is in the diamond surface enrichment, and mainly generate interrupted Cr with C element reaction in the diamond
3C
2Compound.
The hot surfacing acc power of step (2) ionic medium is 500 ~ 1000W, is preferably 900W, and its electric current is 90 ~ 130A, and the beam-plasma sweep speed is 40 ~ 80mm/min, is preferably 45mm/min, and the beam-plasma diameter is 4-7mm, is preferably 6mm.
Step (3) adopts nozzle or funnel in tool base melt surface attitude high-temp solder, to add diamond abrasive grain, and nozzle or bell mouth are 5-10mm apart from the nozzle distance of hot surfacing machine.
The equipment that the present invention adopts mainly contains the hot surfacing machine of plasma, numerical control machine tool.
The present invention is the preparation method of the hot surfacing diamond tool of a kind of individual layer; Use plasma spray welding machine surfacing high-temp solder powder; Adopt the method for machinery in the molten state high-temp solder, directly to add diamond particles uniformly, quick cooling forms in protective atmosphere then, can shorten the reaction time between solder and the diamond like this; When forming the chemical metallurgy combination, reduce the oxidation and the fire damage of diamond particles.In addition, in the process of preparation instrument, the heating and cooling rapid speed has higher tool production efficient.
Hot surfacing is a thermal source with the high energy beam that moves, and the alloy powder that will have property through special spray gun is heated to molten condition, is ejected into through on the purifying pretreatment piece surface with higher speed then, obtains the specific coatings of even compact.
The beam-plasma that the employing energy density is high, warming and cooling rate is fast is as thermal source; Can local heat; The heat affected area is little, and cost is little, utilizes hot surfacing can form the liquid metal bath of fusion at metal material surface; In the molten bath, add diamond abrasive grain in real time, the cooling back forms the mono-layer diamond tool that chemical metallurgy combines.The time that this method exposes under hot environment is very short, can effectively control adamantine fire damage.
The present invention can reduce the oxidation and the fire damage of diamond particles greatly in the chemical metallurgy combination that realizes between diamond particles, solder and the tool base, the excellent properties of diamond tool is not fully exerted.Its production efficiency is higher, has higher binding strength, and the diamond exposure is higher, can realize the highly-efficient processing to fragile materials such as stone material, pottery, glass.
Description of drawings
Fig. 1 is by 45
#The diamond welding process sketch map that steel matrix, nickel-based solder, diamond are put into.
A kind of preparation method of single layer soldering diamond tool, concrete steps are following:
(1) diamond tool matrix preparation
According to the requirement of preparation diamond tool matrix, select 45
#Steel for the preparation diamond tool matrix 1, according to the diamond tool figure to 45
#Steel matrix is carried out the machining moulding, the surface that will carry out plasma spray is cleared up oil removing, rust cleaning.
(2) Ni-Cr alloy surfacing is surperficial to tool base
The Ni-Cr alloy is selected the Ni-Cr-B-Si alloy for use, Cr17% wherein, and B3.5%, Si4.0%, C1%, < 5.0%, surplus is Ni to Fe, and the Ni-Cr alloy was removed moisture in 30 minutes 200 ℃ of insulations in drying box.Utilize PTA-400E type powder plasma surfacing machine that Ni-Cr alloy surfacing is arrived tool base 45
#The steel surface forms nickel-based solder layer 2.The surfacing acc power is 500W, and surfacing speed is 60mm/min, and nozzle 5 is 8-10mm to the distance of tool base, and powder sending quantity is 120g/min, and ionization gas is when to be 180L/H with protection gas be 300L/H.(3) in molten state Ni-Cr alloy, add diamond particles
At the Ni-Cr of molten state alloy in tool base 45
#Before the steel surface solidification, adopt nozzle 4 in the identical time interval, in tool base melt surface attitude high-temp solder, to add diamond abrasive grain, nozzle or bell mouth are 5-10mm apart from the nozzle distance of hot surfacing machine.
(4) brazed diamond tool
The diamond particles that joins in the Ni-Cr alloy of molten state combines with the Ni-Cr alloy generation chemical metallurgy of molten state, adopts an opening to be full of the Flat bottom container of argon gas, will be processed matrix and put into, and argon gas density is heavier, can form protective atmosphere.Cooling prepares diamond tool fast in protective atmosphere.
A kind of preparation method of single layer soldering diamond tool, concrete steps are following:
(1) diamond tool matrix preparation
According to the requirement of preparation diamond tool matrix, select 45
#Steel for the preparation diamond tool matrix 1, according to the diamond tool figure to 45
#Steel matrix is carried out the machining moulding, the surface that will carry out plasma spray is cleared up oil removing, rust cleaning.
(2) Ni-Cr alloy surfacing is surperficial to tool base
The Ni-Cr alloy is selected the Ni-Cr-P alloy powder for use, and wherein Cr 15%, P11%, and surplus is Ni.The Ni-Cr-P powder was removed moisture in 30 minutes 200 ℃ of insulations in drying box.Utilize PTA-400E type powder plasma surfacing machine that Ni-Cr alloy surfacing is arrived tool base 45
#The steel surface.The surfacing acc power is 800W, and surfacing speed is 40mm/min, and nozzle is 5-8mm to the distance of tool base, and powder sending quantity is 130g/min, and ionization gas is when to be 200L/H with protection gas be 380L/H.
(3) in molten state Ni-Cr alloy, add diamond particles
At the Ni-Cr of molten state alloy in tool base 45
#Before the steel surface solidification, adopt nozzle or funnel in tool base melt surface attitude high-temp solder, to add diamond abrasive grain, nozzle or bell mouth are 5-10mm apart from the nozzle distance of hot surfacing machine.
(4) brazed diamond tool
The diamond particles that joins in the Ni-Cr alloy of molten state combines with the Ni-Cr alloy generation chemical metallurgy of molten state, adopts an opening to be full of the Flat bottom container of argon gas, will be processed matrix and put into, and argon gas density is heavier, can form protective atmosphere.Cooling prepares diamond tool fast in protective atmosphere.
A kind of preparation method of single layer soldering diamond tool, concrete steps are following:
(1) diamond tool matrix preparation
According to the requirement of preparation diamond tool matrix, select the matrix of 65Mn steel for the preparation diamond tool, according to the diamond tool figure 65Mn steel matrix is carried out the machining moulding, to clearing up on the surface that will carry out plasma spray oil removing, rust cleaning.
(2) Ni-Cr alloy surfacing is surperficial to tool base
The Ni-Cr alloy is selected the Ni-Cr-B-Si alloy for use, and the Ni-Cr alloy is selected the Ni-Cr-B-Si alloy for use, and wherein Cr 13%, and B 3.5%, and Si 4.0%, and C 0.6%, and Fe 4%, and surplus is Ni.The Ni-Cr alloy was removed moisture in 30 minutes 200 ℃ of insulations in drying box.At surfacing acc power 1000W; Surfacing speed is 80mm/min; Nozzle is 8-10mm to the distance of tool base; Powder sending quantity is 120g/min, and ionization gas is when to be 200L/H with protection gas be 380L/H, utilize PTA-400E type powder plasma surfacing machine with Ni-Cr alloy surfacing to tool base 65MN steel surface.
(3) in molten state Ni-Cr alloy, add diamond particles
Before tool base 65MN steel surface solidification, adopt nozzle or funnel in tool base melt surface attitude high-temp solder, to add diamond abrasive grain at the Ni-Cr of molten state alloy, nozzle or bell mouth are 5-10mm apart from the nozzle distance of hot surfacing machine.
(4) brazed diamond tool
The diamond particles that joins in the Ni-Cr alloy of molten state combines with the Ni-Cr alloy generation chemical metallurgy of molten state, adopts an opening to be full of the Flat bottom container of argon gas, will be processed matrix and put into, and argon gas density is heavier, can form protective atmosphere.Cooling prepares diamond tool fast in protective atmosphere.
Embodiment 4
A kind of preparation method of single layer soldering diamond tool, concrete steps are following:
(1) diamond tool matrix preparation
According to the requirement of preparation diamond tool matrix, select the matrix of 65Mn steel for the preparation diamond tool, according to the diamond tool figure 65Mn steel matrix is carried out the machining moulding, to clearing up on the surface that will carry out plasma spray oil removing, rust cleaning.
(2) Ni-Cr alloy surfacing is surperficial to tool base
The Ni-Cr alloy is selected the Ni-Cr-B-Si alloy for use, and the Ni-Cr alloy is selected the Ni-Cr-B-Si alloy for use, and wherein Cr 13%, and B 3.5%, and Si 4.0%, and C 0.6%, and Fe 4%, and surplus is Ni.The Ni-Cr alloy was removed moisture in 30 minutes 200 ℃ of insulations in drying box.At surfacing acc power 900W; Surfacing speed is 45mm/min; Nozzle is 8-10mm to the distance of tool base; Powder sending quantity is 120g/min, and ionization gas is when to be 200L/H with protection gas be 380L/H, utilize PTA-400E type powder plasma surfacing machine with Ni-Cr alloy surfacing to tool base 65MN steel surface.
(3) in molten state Ni-Cr alloy, add diamond particles
Before tool base 65MN steel surface solidification, step (3) adopts nozzle or funnel in tool base melt surface attitude high-temp solder, to add diamond abrasive grain at the Ni-Cr of molten state alloy, and nozzle or bell mouth are 5-10mm apart from the nozzle distance of hot surfacing machine.
(4) brazed diamond tool
The diamond particles that joins in the Ni-Cr alloy of molten state combines with the Ni-Cr alloy generation chemical metallurgy of molten state, adopts an opening to be full of the Flat bottom container of argon gas, will be processed matrix and put into, and argon gas density is heavier, can form protective atmosphere.Cooling prepares diamond tool fast in protective atmosphere.
The mono-layer diamond sample of hot surfacing preparation through detecting, has been formed a spot of carbide Cr at diamond surface
3C
2, instrument carries out heavy load grinding test on granite, the result shows that diamond abrasive grain belongs to normal wear, whole diamond drop-off phenomenon do not occur, explain matrix to diamond abrasive grain to control intensity higher.
Claims (4)
1. method that adopts the hot surfacing of nickel-based solder to prepare mono-layer diamond tool is characterized in that:
(1) diamond tool matrix preparation: according to the requirement of preparation diamond tool matrix, select the matrix of preparation diamond tool, matrix is carried out the machining moulding, the surface that will carry out plasma spray is cleared up oil removing, processing of rust removing;
(2) the high-temp solder surfacing is surperficial to tool base: as to utilize the plasma spray welding machine to mono-layer diamond tool matrix surfacing molten state high-temp solder;
(3) in the molten state high-temp solder, add diamond particles: in tool base melt surface attitude high-temp solder, add diamond abrasive grain;
(4) brazed diamond tool: behind molten state high-temp solder and the diamond particles generation chemical reaction, rapid solidification forms mono-layer diamond tool in protective atmosphere.
2. the hot surfacing of employing nickel-based solder according to claim 1 prepares the method for mono-layer diamond tool; It is characterized in that: the hot surfacing acc power of step (2) ionic medium is 500 ~ 1000W; The beam-plasma sweep speed is 40 ~ 80mm/min, and the beam-plasma diameter is 4-7mm.
3. the hot surfacing of employing nickel-based solder according to claim 2 prepares the method for mono-layer diamond tool, it is characterized in that: the power 900W of the hot surfacing machine of step (2) ionic medium, beam-plasma sweep speed 45mm/min, beam-plasma diameter are 6mm.
4. the hot surfacing of employing nickel-based solder according to claim 1 and 2 prepares the method for mono-layer diamond tool; It is characterized in that: step (3) adopts nozzle or funnel in tool base melt surface attitude high-temp solder, to add diamond abrasive grain, and nozzle or bell mouth are 5-10mm apart from the nozzle distance of hot surfacing machine.
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| CN 201110354501 CN102430849B (en) | 2011-11-10 | 2011-11-10 | Method for preparing single-layer diamond by means of nickel-based brazing filler metal thermal spray-welding |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103231064A (en) * | 2013-04-28 | 2013-08-07 | 中原工学院 | Manufacturing method for novel nickel base solder brazing monolayer diamond grinding wheel |
| CN103388145A (en) * | 2013-08-05 | 2013-11-13 | 天津德华石油装备制造有限公司 | Overlaying welding method of metal-based composite-type hard-surface material layer of TC (Tungsten Carbide) bearing |
| CN103600151A (en) * | 2013-11-26 | 2014-02-26 | 沈阳理工大学 | Method for implementing cold braze welding on diamond particles in air |
| CN103788926A (en) * | 2014-02-26 | 2014-05-14 | 禹州市和汇超硬材料有限公司 | Diamond grinding material and application of diamond grinding material to manufacture or repair of excavator bucket teeth |
| CN107127455A (en) * | 2017-06-01 | 2017-09-05 | 长沙理工大学 | Method for welding diamond tool by laser-stirring friction |
| CN108993686A (en) * | 2018-07-18 | 2018-12-14 | 仲恺农业工程学院 | Hammer mills and preparation method thereof |
| CN110125826A (en) * | 2019-05-05 | 2019-08-16 | 华侨大学 | A kind of preparation method and device of hedgehog abrasive grain group |
| CN112719497A (en) * | 2020-12-30 | 2021-04-30 | 长沙理工大学 | Preparation method and system for large-particle diamond abrasive particles through laser brazing |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103231064A (en) * | 2013-04-28 | 2013-08-07 | 中原工学院 | Manufacturing method for novel nickel base solder brazing monolayer diamond grinding wheel |
| CN103231064B (en) * | 2013-04-28 | 2014-12-10 | 中原工学院 | Manufacturing method for novel nickel base solder brazing monolayer diamond grinding wheel |
| CN103388145A (en) * | 2013-08-05 | 2013-11-13 | 天津德华石油装备制造有限公司 | Overlaying welding method of metal-based composite-type hard-surface material layer of TC (Tungsten Carbide) bearing |
| CN103600151A (en) * | 2013-11-26 | 2014-02-26 | 沈阳理工大学 | Method for implementing cold braze welding on diamond particles in air |
| CN103788926A (en) * | 2014-02-26 | 2014-05-14 | 禹州市和汇超硬材料有限公司 | Diamond grinding material and application of diamond grinding material to manufacture or repair of excavator bucket teeth |
| CN107127455A (en) * | 2017-06-01 | 2017-09-05 | 长沙理工大学 | Method for welding diamond tool by laser-stirring friction |
| CN108993686A (en) * | 2018-07-18 | 2018-12-14 | 仲恺农业工程学院 | Hammer mills and preparation method thereof |
| CN110125826A (en) * | 2019-05-05 | 2019-08-16 | 华侨大学 | A kind of preparation method and device of hedgehog abrasive grain group |
| CN112719497A (en) * | 2020-12-30 | 2021-04-30 | 长沙理工大学 | Preparation method and system for large-particle diamond abrasive particles through laser brazing |
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Application publication date: 20120502 Assignee: Hubei Changli Superhard Material Co., Ltd. Assignor: Zhongyuan University of Technology Contract record no.: 2014420000072 Denomination of invention: Method for preparing single-layer diamond by means of nickel-based brazing filler metal thermal spray-welding Granted publication date: 20130814 License type: Exclusive License Record date: 20140512 |
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