CN102329151B - Cryogenic treatment method for ceramic/metal ceramic cutting tool - Google Patents
Cryogenic treatment method for ceramic/metal ceramic cutting tool Download PDFInfo
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- CN102329151B CN102329151B CN201110291390.9A CN201110291390A CN102329151B CN 102329151 B CN102329151 B CN 102329151B CN 201110291390 A CN201110291390 A CN 201110291390A CN 102329151 B CN102329151 B CN 102329151B
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Abstract
The invention provides a cryogenic treatment method for ceramic/metal ceramic cutting tools, which can be especially used by cutting tool users to improve the service life of all kinds of finished ceramic/metal ceramic cutting tools. The cryogenic treatment method is suitable for metal ceramic/ceramic cutting tool series such as alumina-based ceramic cutting tool series, silicon-nitride-based ceramic cutting tool series, coating ceramic cutting tool series, TiC-based metal ceramic cutting tool series and Ti(C, N)-based metal ceramic cutting tool series. The cryogenic treatment method is characterized in that when the finished ceramic/metal ceramic cutting tools are in a program-controlled cryogenic box, cooling and heating programs are strictly controlled, firstly the finished ceramic/metal ceramic cutting tools are cooled to liquid nitrogen temperature, i.e. negative 150 DEG C to negative 196 DEG C, heat preservation is conducted for 2-24 hours, then finished ceramic/metal ceramic cutting tools are tempered in the cryogenic box to 150-200 DEG C, heat preservation is conducted for 1-4 hours and finally the finished ceramic/metal ceramic cutting tools are cooled to room temperature together with a furnace. The cryogenic treatment method for ceramic/metal ceramic cutting tools has the advantages that the cost is low, the industrialized production is easy to realize and the overall service life of the treated finished ceramic/metal ceramic cutting tools is prolonged.
Description
Technical field
The invention belongs to material heat treatment process technical field, relate to the thermal treatment of cutter, specially refer to the cryogenic treating process of ceramic/metal ceramic product blade.
Background technology
Sub-zero treatment, claims again very low temperature processing, refer to heat-eliminating medium material by given pace be cooled to-130 ℃～below-196 ℃, after freezing for some time, then material is warmed up to the treatment process of room temperature with given pace.Sub-zero treatment is used widely at Material Fields such as ferrous metal, non-ferrous metal, metal alloy, carbide, plastics, silicate, can significantly improve the mechanical property of material and work-ing life, stable dimensions, the homogeneity of improving, Reducing distortion, and easy and simple to handle, do not destroy workpiece, pollution-free, cost is low, has good development prospect.
Stupalith becomes the most promising cutter Materials for High Speed Cutting of current one with its excellent thermotolerance, wear resistance and chemical stability, has wide practical use aborning.Aspect high speed cutting field and cutting difficult-to-machine material, playing the part of more and more important role.And due to the feature such as it has high temperature resistant, wear-resisting, high temperature creep-resisting, thermal conductivity is low, thermal expansivity is low, chemical resistance is good, under the condition that can not meet the demands in other materials performance, be widely used.
In recent years, sintex industry has obtained development fast, and modern Ceramic Cutting Tool Materials mostly is matrix material.The stupalith that is applied at present cutter is mainly the series such as alumina series, silicon nitride series, titanium boride system and sintering metal.And metal ceramic-based composite material is wherein a kind of type material that last century, the '30s grew up gradually.Sintering metal is a kind of heterogeneous body matrix material being made up of metal or alloy and one or more ceramic phases, wherein the latter to account for the hardness ratio inserted tool of 15%～85% (volume) ceramic tool high, antioxidant property is good, and fracture toughness property and bending strength are higher than nonmetallic ceramics cutter, it is more suitable in the processing to hardened steel, high-strength steel and cast iron, ceramic tool not only can be enhanced productivity greatly, the main component tungsten resource that can also solve rapid steel and inserted tool resource exhaustion problem in the world.Sintering metal tungstenic is few, has that hardness is high, resistance to abrasion is strong, frictional coefficient and the advantage such as cutting force is little, estimates that ceramic tool material will replace WC base cemented carbide, become the new force in whole cutter material.
Cryogenic treatment process is widely applied on speedy steel cutting-tool, inserted tool, and can obviously improve the life-span of these two kinds of cutters, but the cryogenic technology to all kinds of cutters does not have systematic study, and for the sub-zero treatment of pottery or ceramic tool, the report of also not studying at present both at home and abroad, and pottery or sintering metal obdurability is poor, the problem of easy tipping is also urgently to be resolved hurrily.
Summary of the invention
The object of this invention is to provide a kind of cryogenic treatment process for pottery or ceramic tool, be applicable to cutter producer and utilize sub-zero treatment to improve cutter life.
Technical scheme of the present invention is:
Ceramic/metal forming process of ceramics cutter is cleaned after wiping, put into programme controlled deep cooling box.Adopt the system of convective heat exchange.Sub-zero treatment medium is liquid nitrogen, utilize the latent heat of vaporization and low temperature nitrogen heat absorption make processing tank and are reduced by cold object temperature, control cooling rate by controlling the input of liquid nitrogen and the rotating speed of blower fan, and realize automatic adjusting to treatment temp (temperature regulating range for be-196 ℃～200 ℃).Cryogenic treatment process process is as follows:
First drop to-100 ℃～-120 ℃ from room temperature, speed of cooling is 1.5 ℃/min, insulation 1h; Cool to-150 ℃～-196 ℃, speed of cooling is 2 ℃/min again, insulation 2～24h.After sub-zero treatment, close liquid nitrogen transfer valve, start to heat tempering: tempering temperature is 100 ℃～200 ℃, and rate of heating is 2 ℃/min, insulation 1～4h, then naturally cools to room temperature.
By cutter after treatment cryogenic technology, be installed on lathe, try cutter experiment, processing work number improves 50%～150%.
The above ceramic/metal forming process of ceramics cutter refers to aluminum oxide base ceramics cutting tool series, silicon nitride base ceramic cutting tool series, coated ceramic tool series, TiC base ceramet tool bit series, Ti (C, N) base ceramet tool bit series.
The present invention has following beneficial effect:
(1) the present invention is for ceramic/metal ceramic product cutter producer provides a kind of cryogenic treatment process, solved ceramic/metal sintex poor toughness, easily tipping causes low problem of life-span.
(2) system that cryogenic system of the present invention is convective heat exchange, while relying on this system to carry out sub-zero treatment to material, has the advantages such as good effect of heat exchange, cooling rate and treatment temp are controlled, uniformity of temperature profile.
(3) cryogenic technology curve of the present invention, adopts segmentation to carry out, and has stablized deep cooling effect.
Embodiment
Below in conjunction with technical scheme, describe specific embodiments of the invention in detail.
Embodiment 1:
By Al
2o
3base ceramic cutting tool, cleans after wiping, puts into programme controlled deep cooling box, sets technique and starts sub-zero treatment, and technique is: first drop to-100 ℃ from room temperature, speed of cooling is 1.5 ℃/min, insulation 1h; Cool to-150 ℃, speed of cooling is 2 ℃/min again, insulation 24h.After sub-zero treatment, close liquid nitrogen transfer valve, start to heat tempering: tempering temperature is 100 ℃, rate of heating is 2 ℃/min, and insulation 4h, then naturally cools to room temperature.
By cutter after treatment cryogenic technology, be installed on lathe, try cutter experiment, work material is 35CrMnSiA, 124 of 84 raisings of processing work number from deep cooling, increase rate is 50%.
Embodiment 2:
By Ti (C, N) base ceramet tool bit, clean after wiping, put into programme controlled deep cooling box, to set technique and start sub-zero treatment, technique is: first drop to-100 ℃ from room temperature, speed of cooling is 1.5 ℃/min, insulation 1h; Cool to-150 ℃, speed of cooling is 2 ℃/min again, insulation 24h.After sub-zero treatment, close liquid nitrogen transfer valve, start to heat tempering: tempering temperature is 100 ℃, rate of heating is 2 ℃/min, and insulation 4h, then naturally cools to room temperature.
By cutter after treatment cryogenic technology, be installed on lathe, try cutter experiment, work material is 20CrMnTiH, processing work is high speed synchroniser geared sleeve, 200 of 100 raisings of the workpiece number of processing from deep cooling, increase rate is 100%.
Claims (3)
1. the cryogenic treatment process of a pottery or sintering metal finished product cutter, it is characterized in that: ceramic/metal forming process of ceramics cutter cleans after wiping, put into programme controlled deep cooling box, set cryogenic treatment process and carry out sub-zero treatment, by cutter after treatment cryogenic technology, be installed on lathe, try cutter experiment, processing work number improves 50%～150%; Described cryogenic treatment process process is: first drop to-100 ℃～-120 ℃ from room temperature, speed of cooling is 1.5 ℃/min, insulation 1h; Cool to-150 ℃～-196 ℃, speed of cooling is 2 ℃/min again, insulation 2～24h, after sub-zero treatment, close liquid nitrogen transfer valve, start to heat tempering: tempering temperature is 100 ℃～200 ℃, rate of heating is 2 ℃/min, and insulation 1～4h, then naturally cools to room temperature.
2. according to the cryogenic treatment process of a kind of pottery described in claim 1 or sintering metal finished product cutter, it is characterized in that deep cooling box adopts the system of convective heat exchange, sub-zero treatment medium is liquid nitrogen, utilize the latent heat of vaporization and low temperature nitrogen heat absorption make processing tank and are reduced by cold object temperature, control cooling rate by controlling the input of liquid nitrogen and the rotating speed of blower fan, and realize the automatic adjusting to treatment temp.
3. according to the cryogenic treatment process of a kind of pottery described in claim 1 or sintering metal finished product cutter, it is characterized in that described ceramic/metal forming process of ceramics cutter refers to aluminum oxide base ceramics cutting tool series, silicon nitride base ceramic cutting tool series, coated ceramic tool series, TiC base ceramet tool bit series, Ti (C, N) base ceramet tool bit series.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110291390.9A CN102329151B (en) | 2011-09-23 | 2011-09-23 | Cryogenic treatment method for ceramic/metal ceramic cutting tool |
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| CN201110291390.9A CN102329151B (en) | 2011-09-23 | 2011-09-23 | Cryogenic treatment method for ceramic/metal ceramic cutting tool |
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| CN102329151A CN102329151A (en) | 2012-01-25 |
| CN102329151B true CN102329151B (en) | 2014-05-28 |
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Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103667644A (en) * | 2012-09-11 | 2014-03-26 | 财团法人金属工业研究发展中心 | Subzero treatment method and manufacturing method of outer casing thereof |
| CN103525997B (en) * | 2013-09-29 | 2015-04-15 | 三明学院 | High-speed steel cryogenic treatment process |
| CN105671476A (en) * | 2016-01-28 | 2016-06-15 | 安徽工程大学 | Treatment method for improving abrasion resistance of thermal spraying coating |
| CN105690812B (en) * | 2016-03-16 | 2019-06-21 | 中国科学院理化技术研究所 | Online cryogenic modification device of high polymer material injection molding equipment |
| CN107718344B (en) * | 2017-10-14 | 2020-05-05 | 张小泉股份有限公司 | Preparation method of ceramic cutter |
| CN110759749A (en) * | 2019-11-20 | 2020-02-07 | 常东强 | Method for repairing passivated ceramic cutter |
| CN112553548B (en) * | 2020-11-12 | 2021-10-19 | 淮阴工学院 | Method for improving obdurability of aluminum-magnesium alloy welding wire |
| CN115386846A (en) * | 2021-05-24 | 2022-11-25 | 山东理工大学 | Pretreatment process for improving performance of coated hard alloy tool |
| CN115385722A (en) * | 2021-05-24 | 2022-11-25 | 山东理工大学 | Method for prolonging cutting life of polycrystalline cubic boron nitride cutter |
| CN115386814A (en) * | 2021-05-24 | 2022-11-25 | 山东理工大学 | Method for improving hardness of polycrystalline cubic boron nitride product |
| CN115385723A (en) * | 2021-05-24 | 2022-11-25 | 山东理工大学 | Method for improving mechanical property of Sialon ceramic product |
| CN114044683B (en) * | 2021-12-16 | 2022-09-06 | 中南大学湘雅医院 | Oral cavity repairing ceramic material and preparation method thereof |
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| CN100390305C (en) * | 2005-06-28 | 2008-05-28 | 大连理工大学 | Deep cooling treatment method of high speed steel tool |
| CN101660031A (en) * | 2009-09-22 | 2010-03-03 | 大连理工大学 | Periodic sub-zero treatment process of finished high speed steel cutters |
| CN101695808B (en) * | 2009-10-27 | 2013-04-24 | 重庆泰蒙科技有限公司 | Preparation method of high-performance pored ceramic blade |
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