CN102430849B - 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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- CN102430849B CN102430849B CN 201110354501 CN201110354501A CN102430849B CN 102430849 B CN102430849 B CN 102430849B CN 201110354501 CN201110354501 CN 201110354501 CN 201110354501 A CN201110354501 A CN 201110354501A CN 102430849 B CN102430849 B CN 102430849B
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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 ina 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 suitableBe 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 finish, but have following limitation in the vacuum brazing practical application: heating in the brazing process, cool time is 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 be subjected to bigger fire damage in the high-temperature liquid state solder, be subjected to 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 achieving the above object, the technical solution used in the present invention is as follows:
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: according to the requirement of preparation diamond tool matrix, select 45
#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) with the high-temp solder surfacing to the tool base surface: 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 mutually in high temperature moment and are combined, 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 to add diamond abrasive grain in tool base melt surface attitude high-temp solder, 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; cooling formation fast in protective atmosphere then; can shorten the reaction time between solder and the diamond like this; when forming the chemical metallurgy combination, reduce oxidation and the fire damage of diamond particles.In addition, in the process of preparation instrument, heating and cooling speed is very fast, has higher tool production efficient.
Hot surfacing is thermal source with mobile high energy beam, and the alloy powder that will have property by special spray gun is heated to molten condition, is ejected into through purifying on the pretreated piece surface with higher speed then, obtains the specific coatings of even compact.
Adopt the fast beam-plasma of energy density height, warming and cooling rate as thermal source, can local heat, the heat affected area is little, cost is little, utilize hot surfacing can form the liquid metal bath of fusion at metal material surface, add diamond abrasive grain in real time in the molten bath, the cooling back forms the mono-layer diamond tool of chemical metallurgy combination.The time that this method exposes under hot environment is very short, can effectively control adamantine fire damage.
The present invention can reduce 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 schematic diagram that steel matrix, nickel-based solder, diamond are put into.
A kind of preparation method of single layer soldering diamond tool, concrete steps are as follows:
(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 arrived the tool base surface
The Ni-Cr alloy is selected the Ni-Cr-B-Si alloy for use, Cr17% wherein, and B3.5%, Si4.0%, C1%, Fe＜5.0%, surplus is Ni, 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 that 180L/H and protection gas are when being 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 to add diamond abrasive grain in tool base melt surface attitude high-temp solder in the identical time interval, 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 is combined with the Ni-Cr of molten state alloy generation chemical metallurgy, adopts an opening to be full of the Flat bottom container of argon gas, and processed matrix is 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 as follows:
(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 arrived the tool base surface
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 that 200L/H and protection gas are when being 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 to add diamond abrasive grain in tool base melt surface attitude high-temp solder, 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 is combined with the Ni-Cr of molten state alloy generation chemical metallurgy, adopts an opening to be full of the Flat bottom container of argon gas, and processed matrix is 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 as follows:
(1) diamond tool matrix preparation
According to the requirement of preparation diamond tool matrix, select the 65Mn steel for the matrix of 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 arrived the tool base surface
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; ionization gas is 200L/H and protection gas when being 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 to add diamond abrasive grain at the Ni-Cr of molten state alloy in tool base melt surface attitude high-temp solder, 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 is combined with the Ni-Cr of molten state alloy generation chemical metallurgy, adopts an opening to be full of the Flat bottom container of argon gas, and processed matrix is 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 as follows:
(1) diamond tool matrix preparation
According to the requirement of preparation diamond tool matrix, select the 65Mn steel for the matrix of 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 arrived the tool base surface
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; ionization gas is 200L/H and protection gas when being 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 to add diamond abrasive grain in tool base melt surface attitude high-temp solder 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 is combined with the Ni-Cr of molten state alloy generation chemical metallurgy, adopts an opening to be full of the Flat bottom container of argon gas, and processed matrix is put into, and argon gas density is heavier, can form protective atmosphere.Cooling prepares diamond tool fast in protective atmosphere.
With the mono-layer diamond sample of hot surfacing preparation after testing, formed a spot of carbide Cr at diamond surface
3C
2, instrument carries out heavy load grinding test at granite, the result shows that diamond abrasive grain belongs to normal wear, whole diamond drop-off phenomenon do not occur, illustrate matrix to diamond abrasive grain to control intensity higher.
Claims (1)
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) with the high-temp solder surfacing to the tool base surface: 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;
The power 900W of the hot surfacing machine of step (2) ionic medium, beam-plasma sweep speed 45mm/min, beam-plasma diameter are 6mm;
Step (3) adopts nozzle or funnel to add diamond abrasive grain in tool base melt surface attitude high-temp solder, 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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| CN102430849B true CN102430849B (en) | 2013-08-14 |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
| CN103788926B (en) * | 2014-02-26 | 2015-08-19 | 禹州市和汇超硬材料有限公司 | A kind of diamond abrasive and the application in making or reparation excavator bucket teeth thereof |
| CN107127455B (en) * | 2017-06-01 | 2018-10-19 | 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 |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1597219A (en) * | 2004-09-08 | 2005-03-23 | 华侨大学 | Preparation method of single layer soldering diamond tool |
| CN101130213A (en) * | 2007-09-18 | 2008-02-27 | 南京航空航天大学 | Method for manufacturing nickel base brazing filler metal laser braze welding diamond abrasive grain |
| CN101524779A (en) * | 2008-03-05 | 2009-09-09 | 丹阳市友和工具有限责任公司 | Brazing technology for diamond |
| CN102059423A (en) * | 2010-11-30 | 2011-05-18 | 中原工学院 | Method for manufacturing diamond tool with self-lubrication function |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05310498A (en) * | 1992-05-12 | 1993-11-22 | Nippon Seiko Kk | Material coated with artificial diamond |
| US6815052B2 (en) * | 2000-12-01 | 2004-11-09 | P1 Diamond, Inc. | Filled diamond foam material and method for forming same |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1597219A (en) * | 2004-09-08 | 2005-03-23 | 华侨大学 | Preparation method of single layer soldering diamond tool |
| CN101130213A (en) * | 2007-09-18 | 2008-02-27 | 南京航空航天大学 | Method for manufacturing nickel base brazing filler metal laser braze welding diamond abrasive grain |
| CN101524779A (en) * | 2008-03-05 | 2009-09-09 | 丹阳市友和工具有限责任公司 | Brazing technology for diamond |
| CN102059423A (en) * | 2010-11-30 | 2011-05-18 | 中原工学院 | Method for manufacturing diamond tool with self-lubrication function |
Non-Patent Citations (1)
| Title |
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| JP特开平5-310498A 1993.11.22 |
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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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