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Preparation method for anti-oxidation composite hard coating

A hard coating and anti-oxidation technology, which is applied in the direction of coating, metal material coating process, ion implantation plating, etc., can solve the problem that the oxidation resistance is difficult to meet

Inactive Publication Date: 2014-05-07
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Later, on the basis of TiN, TiAlN, TiAlCrN and TiAlSiN coatings were continuously developed. These coatings have certain improvements in hardness and wear resistance, but the oxidation resistance is still difficult to meet the increasing cutting conditions.

Method used

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  • Preparation method for anti-oxidation composite hard coating
  • Preparation method for anti-oxidation composite hard coating
  • Preparation method for anti-oxidation composite hard coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Carbide milling cutters are degreased, sandblasted and ultrasonically cleaned by conventional methods and placed in the coating chamber, and then the coating chamber is evacuated to 5.0×10 -3 pa, argon is introduced to make the total pressure in the vacuum chamber 4.0×10 -1 pa, and control the column arc current to 150A to heat the tool to be plated for 150min; at a pressure of 1.8×10 -1 Under the protection of Pa argon gas, the DC bias voltage of the control tool is -200V, the pulse bias voltage is -600V, the arc current of the control column is 120A, and the tool is cleaned with 7.0KW plasma for 30min; 2 =1 / 2 of Ar and N 2 The mixed gas, keep the pressure at 3.0×10 -1 pa, heat the Ti ingot with a column arc, the current of the column arc is 180A, the power is 11.0KW, and it is plated for 10min at DC bias voltage -200V, pulse bias voltage -400V; keep Ar / N 2 =i / 2 and 3.0×10 -1 The pressure of Pa is sputtering the composite alloy target material of Ti:Al:La=69:30:1 b...

Embodiment 2

[0035] Carbide turning tools are degreased, sandblasted and ultrasonically cleaned by conventional methods and placed in the coating chamber, and then the coating chamber is evacuated to 5.0×10 -3 pa (claim is 5.0×10 -3 pa), and argon gas was introduced to make the total pressure in the vacuum chamber 4.0×10 -1 pa, and control the column arc current to 160A to heat the tool to be plated for 80min; at a pressure of 1.5×10 -1Under the protection of Pa argon gas, the DC bias voltage of the control tool is -200V, the pulse bias voltage is -500V, the arc current of the control column is 130A, and the tool is cleaned with 8.0KW plasma for 30min; 2 =1 / 3 of Ar and N 2 The mixed gas, keep the pressure at 3.5×10 -1 Pa, heat the Ti ingot with a column arc, the current of the column arc is 200A, the power is 12.0KW, and it is plated for 10min at DC bias voltage -200V, pulse bias voltage -500V; keep Ar / N 2 =1 / 3 and 3.5×10 -1 The pressure of pa is sputtering the composite alloy target ...

Embodiment 3

[0039] The high-speed steel taps are degreased, sandblasted and ultrasonically cleaned by conventional methods and put into the coating chamber, and then the coating chamber is evacuated to 5.0×10 -3 pa, argon gas is introduced to make the total pressure in the vacuum chamber 3.0×10 -1 Pa, and control the column arc current to 140A to heat the tool to be plated for 40min; at a pressure of 1.5×10 -1 Under the protection of pa argon gas, the DC bias voltage of the control tool is -100V, the pulse bias voltage is -500V, the arc current of the control column is 140A, and the tool is cleaned with 9.0KW plasma for 15 minutes; 2 =1 / 1.5 of Ar and N 2 The mixed gas, keep the pressure at 3.0×10 -1 pa, heat the Ti ingot with a column arc, the current of the column arc is 180A, the power is 13.0KW, and it is plated for 5min under DC bias voltage -100V, pulse bias voltage -500V; keep Ar / N 2 =1 / 1.5 and 3.0×10 -1 The pressure of Pa is sputtering the composite alloy target of Ti:Al:La=69:...

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Abstract

The invention discloses a preparation method for an anti-oxidation composite hard coating on a cutting tool, which comprises the steps of workpiece heating, plasma cleaning of the workpiece, transition layer preparation, coating preparation and cooling; a Ti cast ingot in a crucible is used as a Ti source of a TiN transition layer, and the evaporation rate of the Ti cast ingot is controlled through the supply current of an arc column in hot-cathode ion plating; a plane TiAlLa target is used as a source of the corresponding element of a (TiAlLa)N coating, and the sputtering rate of a target is controlled through regulating the power of a medium frequency pulsed power supply; high-purity Ar is used as ionization gas. N2 is used as reaction gas. The thickness of the (TiAlLa)N coating prepared through the method is about 2 microns, nano-hardness of the coating is more than 40 Gpa, the anti-oxidation temperature of the coating can reach over 900 DEGC, and the indentation experiment level of the coating is HF1 (VDI3198 in German standard); compared with the TiAlN coating, the (TAlLa)N coating has better resistance to oxidation and mechanical properties, and is longer in service life.

Description

technical field [0001] The invention relates to a method for preparing an anti-oxidation coating material on the surface of a cutting tool, in particular to a method for preparing an anti-oxidation composite hard coating material on the surface of a cutting tool. Background technique [0002] With the development of processing technology, cutting tool processing technology is also constantly improving. Tool coating can effectively improve the hardness, wear resistance and oxidation resistance of the tool surface, thereby improving the service life of the tool to a certain extent, and at the same time allowing the tool to cope with more severe cutting conditions. The earliest application of tool coating is TiN coating, its wear resistance and oxidation resistance are greatly improved compared with the tool matrix. Later, on the basis of TiN, TiAlN, TiAlCrN and TiAlSiN coatings were continuously developed. These coatings have certain improvements in hardness and wear resistan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C14/26C23C14/34C23C14/06
Inventor 赵海波杜昊梁雅庭梁红樱
Owner SICHUAN UNIV
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