TiSiN+ZrSiN composite Nano coated cutting tool and preparation method thereof
One, technical field
The invention belongs to technical field of mechanical cutting tool manufacture, particularly relate to a kind of TiSiN+ZrSiN composite Nano coated cutting tool and preparation method thereof.
Two, background technology
The TiSiN film is as a kind of nano superhard coating, and its hardness is very high, and oxidative resistance, wearability have greatly improved with respect to the binary nitride coatings, have obtained application at aspects such as cutter, moulds.Si content atomic percentage is in 6~10% scopes the time, the hardness maximum, but coefficient of friction higher (0.6~0.9) easily bonds in processes such as cutting, and energy loss is more.ZrSiN film crystal grain is also at nanoscale, and coefficient of friction is comparatively responsive to Si content, and it has lower coefficient of friction (0.2~0.5) in the time of in Si content atomic percentage 6~10% scopes, and high-temperature oxidation, wearability are better, but hardness is lower.In recent years, along with the development that is coated with layer deposition techniques, compoundization of coating material structure, multiple stratification can be integrated the function of different coating, become one of important directions of coating development.
Chinese patent " patent No.: 200910044474.5 " has been reported overbrushing layer cutter that the method for employing physical vapour deposition (PVD) periodically deposits and preparation method thereof, each cycle of this coating comprise the TiN layer to the TiSiN layer to the TiAlSiN layer to the TiSiN layer, coating was superposeed by a plurality of cycles; Chinese patent " patent No.: 201010274510.X " has been reported the method for preparing nanostructured ZrSiN coating at carbide surface, and it is to adopt the method for direct magnetic control and radio frequency magnetron cosputtering to deposit the ZrSiN coating in the atmosphere of argon gas and nitrogen; Chinese patent: " patent No.: 200880018340.X " reported a kind of surface-coated cutting tool, its overlay film is compound super plural layers, its structure can be divided into two big layers, first layer alternately is made up of one or more A1 layers and B layer, second largest layer is alternately piled up by one or more A2 layers and C layer, wherein A1 layer and A2 layer are respectively a kind of among TiN, TiCN, TiAlN and the TiAlCN, B layer and C layer are alternately piled up by one or more TiSiN or TiSiCN layer and AlCrN or AlCrCN layer respectively and form, its method complex process requires very high to equipment.
Three, summary of the invention
The objective of the invention is to overcome above-mentioned the deficiencies in the prior art, a kind of TiSiN+ZrSiN composite Nano coated cutting tool and preparation method thereof is provided.This cutter coat is sandwich construction, and tool surface is the ZrSiN layer, between ZrSiN layer and the TiSiN layer TiZrSiN transition zone is arranged, and the Ti transition zone is arranged between TiSiN layer and matrix.TiSiN+ZrSiN composite Nano coated cutting tool also is combined the high rigid and low-friction coefficient of ZrSiN of TiSiN in the high-temperature oxidation with siliceous nitride coatings excellence.This coated cutting tool is done when cutting, and can fall to reduce friction, reduces bonding, reduces cutting force, and raising cutter high temperature oxidative resistance reduces tool wear, improves cutter life.
The present invention realizes in the following manner.
TiSiN+ZrSiN composite Nano coated cutting tool and preparation method thereof, the tool matrix material is high-speed steel or carbide alloy, coating is sandwich construction, tool surface is the ZrSiN layer, between ZrSiN layer and the TiSiN layer TiZrSiN transition zone is arranged, the Ti transition zone is arranged between TiSiN layer and matrix, and wherein the atomic percentage of TiSiN layer, ZrSiN layer Si content is in 6~10% scopes.
The preparation method of TiSiN+ZrSiN composite Nano coated cutting tool adopts the mode of multi-arc ion coating+medium frequency magnetron sputtering codeposition, and its concrete preparation process is:
(1) pre-treatment: the tool matrix material is polished to minute surface, removes surface contamination layer, put into alcohol ultrasonic cleaning 15min, fully put into the coating machine vacuum chamber, vacuum chamber base vacuum 7.0 * 10 after the drying
-3Pa is heated to 200~250 ℃, insulation 30min;
(2) ion cleans: feed Ar gas, atmospheric pressure is 1.5Pa, and unbalanced pulse grid bias power supply, voltage are 800~900V, dutycycle 0.2, and aura cleans 15min; Bias voltage is down to 400~600V, opens ion gun, opens arc source Ti target, and electric current transfers to 65A, and ion cleans 1~2min;
(3) depositing Ti: adjusting Ar air pressure is 0.5Pa, and bias voltage is down to 150V, electric arc plating Ti5~7min;
(4) depositing Ti SiN: the adjustment operating air pressure is 0.4~0.5Pa, and bias voltage 150V, electric arc target Ti target current are 65A, opens N
2, adjust N
2Flow is 140~180sccm, opens intermediate frequency Si target current 3.5~4.5A, electric arc plating+medium frequency magnetron sputtering codeposition TiSiN90~100min;
(5) depositing Ti ZrSiN: open electric arc target Zr target, electric current transfers to 60A, and the Zr target current is 70A every the 1min 1A that raises until electric current then, multi-arc ion coating+medium frequency magnetron sputtering depositing Ti ZrSiN10min;
(6) deposition ZrSiN: adjust N
2Flow is 120~160sccm, closes the Ti target, electric arc plating+medium frequency magnetron sputtering deposition ZrSiN50~60min.
(7) post processing: close Zr target, Si target, close ion gun and gas source, close pulsed bias power supply, coating finishes.
By the TiSiN+ZrSiN composite Nano coated cutting tool of above-mentioned technology preparation, coating is sandwich construction, is respectively Ti, TiSiN, TiZrSiN and ZrSiN from inside to outside.Transition zone Ti can reduce matrix and the residual stress that is coated with interlayer, strengthens coating's adhesion; The TiZrSiN layer can reduce the adverse effect of TiSiN layer and the sudden change of ZrSiN composition of layer, helps two-layer good combination; Coating also is combined the high rigid and low-friction coefficient of ZrSiN of TiSiN except having excellent high-temperature oxidation, has improved the friction and wear behavior of coated cutting tool.This coated cutting tool can be widely used in doing the machining of machining and difficult-to-machine material.
Four, description of drawings
Accompanying drawing is the coating structure schematic diagram of TiSiN+ZrSiN composite Nano coated cutting tool of the present invention.Wherein: 1 is tool matrix, and 2 is the Ti transition zone, and 3 is the TiSiN layer, and 4 is the TiZrSiN layer, and 5 is the ZrSiN layer.
Five, the specific embodiment
Provide two most preferred embodiments of the present invention below:
Embodiment 1:
A kind of TiSiN+ZrSiN composite Nano coated cutting tool and preparation method thereof, the tool matrix material is the YS8 carbide alloy, and coating is sandwich construction, and tool surface is the ZrSiN layer, between ZrSiN layer and the TiSiN layer TiZrSiN transition zone is arranged, the Ti transition zone is arranged between TiSiN layer and matrix.The preparation method of TiSiN+ZrSiN composite Nano coated cutting tool adopts the mode of multi-arc ion coating+medium frequency magnetron sputtering codeposition, and its concrete preparation process is:
(1) pre-treatment: YS8 hard alloy cutter matrix material is polished to minute surface, removes surface contamination layer, put into alcohol ultrasonic cleaning 15min, fully put into the coating machine vacuum chamber, vacuum chamber base vacuum 7.0 * 10-after the drying
-3Pa is heated to 250 ℃, insulation 30min;
(2) ion cleans: feed Ar gas, atmospheric pressure is 1.5Pa, and unbalanced pulse grid bias power supply, voltage are 900V, dutycycle 0.2, and aura cleans 15min; Bias voltage is down to 600V, opens ion gun, opens arc source Ti target, and electric current transfers to 65A, and ion cleans 2min;
(3) depositing Ti: adjusting Ar air pressure is 0.5Pa, and bias voltage is down to 150V, electric arc plating Ti6min;
(4) depositing Ti SiN: the adjustment operating air pressure is 0.5Pa, and bias voltage 150V, electric arc target Ti target current are 65A, opens N
2, adjust N
2Flow is 180sccm, opens intermediate frequency Si target current 4.5A, electric arc plating+medium frequency magnetron sputtering codeposition TiSiN90min;
(5) depositing Ti ZrSiN: open electric arc target Zr target, electric current transfers to 60A, and the Zr target current is 70A every the 1min 1A that raises until electric current then, multi-arc ion coating+medium frequency magnetron sputtering depositing Ti ZrSiN10min;
(6) deposition ZrSiN: adjust N
2Flow is 160sccm, closes the Ti target, electric arc plating+medium frequency magnetron sputtering deposition ZrSiN60min.
(7) post processing: close Zr target, Si target, close ion gun and gas source, close pulsed bias power supply, coating finishes.
Embodiment two:
A kind of TiSiN+ZrSiN composite Nano coated cutting tool and preparation method thereof, the tool matrix material is the W18Cr4V high-speed steel, and coating is sandwich construction, and tool surface is the ZrSiN layer, between ZrSiN layer and the TiSiN layer TiZrSiN transition zone is arranged, the Ti transition zone is arranged between TiSiN layer and matrix.The preparation method of TiSiN+ZrSiN composite Nano coated cutting tool adopts the mode of multi-arc ion coating+medium frequency magnetron sputtering codeposition, and its concrete preparation process is:
(1) pre-treatment: W18Cr4V high-speed steel tool matrix material is polished to minute surface, removes surface contamination layer, put into alcohol ultrasonic cleaning 15min, fully put into the coating machine vacuum chamber, vacuum chamber base vacuum 7.0 * 10 after the drying
-3Pa is heated to 200 ℃, insulation 30min;
(2) ion cleans: feed Ar gas, atmospheric pressure is 1.5Pa, and unbalanced pulse grid bias power supply, voltage are 800V, dutycycle 0.2, and aura cleans 15min; Bias voltage is down to 400V, opens ion gun, opens arc source Ti target, and electric current transfers to 65A, and ion cleans 1min;
(3) depositing Ti: adjusting Ar air pressure is 0.5Pa, and bias voltage is down to 150V, electric arc plating Ti7min;
(4) depositing Ti SiN: the adjustment operating air pressure is 0.45Pa, and bias voltage 150V, electric arc target Ti target current are 65A, opens N
2, adjust N
2Flow is 150sccm, opens intermediate frequency Si target current 4A, electric arc plating+medium frequency magnetron sputtering codeposition TiSiN120min;
(5) depositing Ti ZrSiN: open electric arc target Zr target, electric current transfers to 60A, and the Zr target current is 70A every the 1min 1A that raises until electric current then, multi-arc ion coating+medium frequency magnetron sputtering depositing Ti ZrSiN10min;
(6) deposition ZrSiN: adjust N
2Flow is 130sccm, closes the Ti target, electric arc plating+medium frequency magnetron sputtering deposition ZrSiN40min;
(7) post processing: close Zr target, Si target, close ion gun and gas source, close pulsed bias power supply, coating finishes.