CN110317047A - A kind of temperature gradient selfreparing multi-layered ceramic cutter - Google Patents

A kind of temperature gradient selfreparing multi-layered ceramic cutter Download PDF

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CN110317047A
CN110317047A CN201910620318.2A CN201910620318A CN110317047A CN 110317047 A CN110317047 A CN 110317047A CN 201910620318 A CN201910620318 A CN 201910620318A CN 110317047 A CN110317047 A CN 110317047A
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mos
sic
tin
layered ceramic
cutter
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孙军龙
刘长霞
宫峰
赵万胜
李刚
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Ludong University
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    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
    • C04B35/10—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on aluminium oxide
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    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
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    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3224—Rare earth oxide or oxide forming salts thereof, e.g. scandium oxide
    • C04B2235/3225—Yttrium oxide or oxide-forming salts thereof
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    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/38—Non-oxide ceramic constituents or additives
    • C04B2235/3817—Carbides
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    • C04B2235/3852—Nitrides, e.g. oxynitrides, carbonitrides, oxycarbonitrides, lithium nitride, magnesium nitride
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Abstract

The present invention provides a kind of temperature gradient selfreparing multi-layered ceramic cutter, it is characterized in that being inhibited using cutting temperature gradient, pulling and pressed effect is contained and repairs the crackle in multi-layered ceramic cutter；When cutting temperature is lower, Al is derived from2O3Additive (TiN, MoS when lamination cutter is sintered institute2, SiC) and Al2O3Matrix, Al2O3‑TiN‑MoS2‑Y2O3Layer and Al2O3‑SiC‑MoS2‑Y2O3Low-temp. extrusion effect caused by the residual stress formed between layer inhibits the generation of crackle；Al is increased in cutting temperature2O3Multi-layered ceramic tool-chip-oxygen-enriched environment, machined surface occur chemical reaction and (mainly rely on TiN, MoS2, SiC oxidation reaction generate TiO2、MoO3、SiO2), generate bridging particle (mainly TiO2、MoO3、SiO2)；And product is because of high temperature extrusion effect caused by the coefficient of thermal expansion mismatch with matrix；TiO2、MoO3、SiO2Bridging particle generates and grows up in inside crack, forms the comprehensive effect for drawing effect to combine with pressure effect.

Description

A kind of temperature gradient selfreparing multi-layered ceramic cutter
Technical field
The invention belongs to technical field of mechanical cutting tool manufacture, in particular to a kind of temperature gradient selfreparing multi-layered ceramic Cutter preparation method.
Background technique
As High-speed Machining Technology gradually promotes and applies, sintex becomes a kind of quite promising cutter.To the greatest extent Existing numerous studies are managed to be dedicated to improving brittleness of ceramics, however compared with other materials, brittleness is still far below hard alloy Brittleness.Laminated construction is a kind of cross structure, can effectively improve ceramic composite to the ability to bear of defect, avoids it prominent So fracture, improves the reliability and system stability of ceramic component.Stack technology is applied in sintex, ceramics can be taken into account The hardness and toughness reguirements of cutter, thus multi-layered ceramic cutter comes into being.
When multi-layered ceramic cutter is applied to high-speed dry cutting, at its rake face-chip and flank-machined surface two The secondary temperature of key friction is higher, acts on it by coupling stress (mechanical stress and thermal stress), and thermal stress is followed with heat Ring number increases and increases.It is cracked when coupling stress is more than laminated material strength degree；It is microcosmic with the increase of stress It is extended in laminated material with macroscopic cracking；Eventually lead to the failure of multi-layered ceramic cutter.
For the extension for resisting microfissure, the ability that multi-layered ceramic cutter supports coupling stress, a kind of feasible solution are improved Approach is as follows: when cutting temperature is lower, being formed by the effect of low-temp. extrusion caused by remaining compressive pre-stress from cutter sintering It should inhibit the generation of crackle；Chemistry occurs for multi-layered ceramic tool-chip-environment, machined surface instead after cutting temperature raising It answers, generates the particle (bridging particle) of filling crackle；And product is because of high temperature caused by the coefficient of thermal expansion mismatch with matrix Extrusion effect (pressure effect).Bridging particle generates and grows up in inside crack, holds crackle two sides (drawing effect), and pressure effect It answers, forms a kind of utilization cutting temperature gradient selfreparing multi-layered ceramic cutter.The cutter has the ability of selfreparing, not only makes it It endures defect ability to further increase, improves its reliability, extended period service life.
Summary of the invention
It is an object of the invention to overcome the problems, such as that above-mentioned existing sintex is insufficient to coupling stress resilience, provide A kind of temperature gradient selfreparing multi-layered ceramic cutter preparation method.
The present invention is accomplished by the following way:
A kind of temperature gradient selfreparing multi-layered ceramic cutter, it is characterized in that being inhibited using cutting temperature gradient, pulling and pressed effect is contained With the crackle in reparation multi-layered ceramic cutter；When cutting temperature is lower, Al is derived from2O3Additive when lamination cutter is sintered institute (TiN、MoS2, SiC) and Al2O3Matrix, Al2O3-TiN-MoS2-Y2O3Layer and Al2O3-SiC-MoS2-Y2O3It is formed between layer The generation of the inhibition crackle of low-temp. extrusion effect caused by residual stress；Al is increased in cutting temperature2O3Multi-layered ceramic tool-chip- Oxygen-enriched environment, machined surface occur chemical reaction and (mainly rely on TiN, MoS2, SiC oxidation reaction generate TiO2、MoO3、 SiO2), generate bridging particle (mainly TiO2、MoO3、SiO2)；And high temperature extrusion effect；TiO2、MoO3、SiO2Bridging Grain generates and grows up in inside crack, forms the comprehensive effect for drawing effect to combine with pressure effect.
A kind of temperature gradient selfreparing multi-layered ceramic cutter, the cutter is with Al2O3-TiN-MoS2-Y2O3With Al2O3-SiC- MoS2-Y2O3It is staggered to form multilayered structure；Al2O3-TiN-MoS2-Y2O3Layer and Al2O3-SiC-MoS2-Y2O3The Thickness ratio of layer is 2 To 5, the number of plies is respectively 3 to 5 layers, Al2O3-SiC-MoS2-Y2O3Thickness is 0.2-1mm, and step of preparation process is as follows:
(1) according to Al2O3Content is 69-89wt.%, and TiN content is 5-15wt.%, MoS2Content is 5-15wt.%, Y2O3Content For the ratio of 1-3wt.%, composite powder is configured, using ethyl alcohol as medium, Ball-milling Time is 120 hours, and ball milling speed is 50rpm；
(2) according to Al2O3Content is 69-89wt.%, SiC content 5-15wt.%, MoS2Content is 5-15wt.%, Y2O3Content For the ratio of 1-3wt.%, composite powder is configured, using ethyl alcohol as medium, Ball-milling Time is 120 hours, and ball milling speed is 50rpm；
(3) Al that ball milling is good2O3-TiN-MoS2-Y2O3With Al2O3-SiC-MoS2-Y2O3Two kinds of ceramic composite powders are put into very It is dry in empty drying box, after waiting it to cool completely, utilize the sieve of 120 mesh；
(4) by Al2O3-TiN-MoS2-Y2O3With Al2O3-SiC-MoS2-Y2O3Two kinds of ceramic composite powders are staggeredly put into three Gao Shi In black mold, tablet press machine precompressed ceramic idiosome, preload pressure 3MPa are then utilized；
(5) heat pressing process preparation temperature gradient selfreparing multi-layered ceramic cutter, technological parameter are utilized are as follows: sintering temperature is 1600 DEG C, pressure 30MPa, soaking time 45-90min；
(6) it when using this tool sharpening, is passed through oxygen and forms oxygen-enriched environment, promote the selfreparing of cutter.
The temperature gradient selfreparing multi-layered ceramic cutter that the present invention is prepared by above-mentioned technique, can be used for cutting austenitic not The difficult-to-machine materials such as rust steel (lCrl8Ni9Ti), nickel-base alloy Inconel-718, Ti6A14V alloy.
Detailed description of the invention
Fig. 1 is that the temperature gradient selfreparing multi-layered ceramic cutter of the invention depression effect in low temperature forms schematic diagram, Fig. 2 Inhibit to form schematic diagram with self-repair effect at high temperature for temperature gradient selfreparing multi-layered ceramic cutter, Fig. 3 is temperature gradient Selfreparing multi-layered ceramic cutter SEM picture；Wherein: 1 has an effect original extruding particle for low temperature, 2 compression when being low temperature, The 3 original extruding particles having an effect for high temperature, the 4 low-temp. extrusion particles later for volume expansion, 5 be cutter-oxygen and knife Tool-chip reactant, 6 be the crackle formed, and 7 be bridging particle, and 8 compression formed when higher for cutting temperature, 9 be to narrow Crackle, 10 be the later high temperature extrusion particles of volume expansion, and 11 be ateliosis bridging particle, and 12 be full grown bridge Join particle, 13 be the crackle being filled.
Specific embodiment
According to Al2O3: TiN:MoS2: Y2O3The mass ratio of=79:12.5:7.5:1, configure composite powder, using ethyl alcohol as Medium, Ball-milling Time are 120 hours, ball milling speed 50rpm；According to Al2O3: SiC:MoS2: Y2O3=79:12.5:7.5:1's Mass ratio configures composite powder, and using ethyl alcohol as medium, Ball-milling Time is 120 hours, ball milling speed 50rpm；Ball milling is good Al2O3-TiN-MoS2-Y2O3With Al2O3-SiC-MoS2-Y2O3Two kinds of ceramic composite powders are put into drying in vacuum oven, After cooling completely Deng it, the sieve of 120 mesh is utilized；Al2O3-TiN-MoS2-Y2O3Layer and Al2O3-SiC-MoS2-Y2O3The layer of layer Thickness rate is 2, Al2O3-TiN-MoS2-Y2O3The number of plies of layer is 4 layers, and its outer layer, Al2O3-SiC-MoS2-Y2O3Layer is 3 layers, Al2O3-SiC-MoS2-Y2O3Thickness is 0.2mm, by Al2O3-TiN-MoS2-Y2O3With Al2O3-SiC-MoS2-Y2O3Two kinds of ceramics Composite powder is staggeredly put into three high graphite jigs, then utilizes tablet press machine precompressed ceramic idiosome, preload pressure 3MPa；It utilizes Heat pressing process preparation temperature gradient selfreparing multi-layered ceramic cutter, technological parameter are as follows: sintering temperature is 1600 DEG C, pressure 30MPa, soaking time 60min；When using this tool sharpening, it is passed through oxygen and forms oxygen-enriched environment, promote the selfreparing of cutter.

Claims (3)

1. a kind of temperature gradient selfreparing multi-layered ceramic cutter, it is characterized in that being inhibited using cutting temperature gradient, pulling and pressed effect is held back Crackle in system and reparation multi-layered ceramic cutter；When cutting temperature is lower, Al is derived from2O3Lamination cutter is sintered institute Shi Tianjia Object (TiN, MoS2, SiC) and Al2O3Matrix, Al2O3-TiN-MoS2-Y2O3Layer and Al2O3-SiC-MoS2-Y2O3It is formed between layer Residual stress caused by low-temp. extrusion effect inhibit crackle generation；Al is increased in cutting temperature2O3Multi-layered ceramic cutter-cut Bits-oxygen-enriched environment, machined surface occur chemical reaction and (mainly rely on TiN, MoS2, SiC oxidation reaction generate TiO2、 MoO3、SiO2), generate bridging particle (mainly TiO2、MoO3、SiO2)；And product with the thermal expansion coefficient of matrix because losing With caused high temperature extrusion effect；TiO2、MoO3、SiO2Bridging particle generates and grows up in inside crack, is formed and draws effect and pressure The comprehensive effect that effect combines.
2. requiring a kind of temperature gradient selfreparing multi-layered ceramic cutter according to claim 1, it is characterised in that with Al2O3-TiN- MoS2-Y2O3With Al2O3-SiC-MoS2-Y2O3It is staggered to form multilayered structure；Al2O3-TiN-MoS2-Y2O3Layer and Al2O3-SiC- MoS2-Y2O3The Thickness ratio of layer is 2 to 5, and the number of plies is respectively 3 to 5 layers, Al2O3-SiC-MoS2-Y2O3Thickness is 0.2-1mm, base Steps are as follows for preparation process:
(1) according to Al2O3Content is 69-89wt.%, and TiN content is 5-15wt.%, MoS2Content is 5-15wt.%, Y2O3Content For the ratio of 1-3wt.%, composite powder is configured, using ethyl alcohol as medium, Ball-milling Time is 120 hours, and ball milling speed is 50rpm；
(2) according to Al2O3Content is 69-89wt.%, SiC content 5-15wt.%, MoS2Content is 5-15wt.%, Y2O3Content For the ratio of 1-3wt.%, composite powder is configured, using ethyl alcohol as medium, Ball-milling Time is 120 hours, and ball milling speed is 50rpm；
(3) Al that ball milling is good2O3-TiN-MoS2-Y2O3With Al2O3-SiC-MoS2-Y2O3Two kinds of ceramic composite powders are put into very It is dry in empty drying box, after waiting it to cool completely, utilize the sieve of 120 mesh.
3. requiring a kind of temperature gradient selfreparing multi-layered ceramic cutter according to claim 1, which is characterized in that its sintering step is such as Under:
(1) by Al2O3-TiN-MoS2-Y2O3With Al2O3-SiC-MoS2-Y2O3Two kinds of ceramic composite powders are staggeredly put into three Gao Shi In black mold, tablet press machine precompressed ceramic idiosome, preload pressure 3MPa are then utilized；
(2) heat pressing process preparation temperature gradient selfreparing multi-layered ceramic cutter, technological parameter are utilized are as follows: sintering temperature is 1600 DEG C, pressure 30MPa, soaking time 45-90min；
(3) it when using this tool sharpening, is passed through oxygen and forms oxygen-enriched environment, promote the selfreparing of cutter.
CN201910620318.2A 2019-07-10 2019-07-10 A kind of temperature gradient selfreparing multi-layered ceramic cutter Pending CN110317047A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116789440A (en) * 2023-06-29 2023-09-22 齐鲁工业大学(山东省科学院) Self-repairing ceramic material capable of reducing porosity and preparation method thereof

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116789440A (en) * 2023-06-29 2023-09-22 齐鲁工业大学(山东省科学院) Self-repairing ceramic material capable of reducing porosity and preparation method thereof
CN116789440B (en) * 2023-06-29 2024-04-05 齐鲁工业大学(山东省科学院) Self-repairing ceramic material capable of reducing porosity and preparation method thereof

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Application publication date: 20191011