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CN-122013106-A - Multi-element composite coating cutter and preparation method and application thereof

CN122013106ACN 122013106 ACN122013106 ACN 122013106ACN-122013106-A

Abstract

The invention discloses a multi-component composite coating cutter with high hardness, excellent high-temperature oxidation resistance and wear resistance, which can meet the dry processing requirements of difficult-to-process materials such as titanium alloy and the like, and a preparation method and application thereof. The multi-component composite coating cutter comprises a substrate, and an AlTiN coating, an AlTiCrN coating and a AlTiCrSiBN coating which are sequentially deposited on the substrate. The preparation method of the multi-component composite coating cutter comprises the following steps of depositing an AlTi target on the surface of a substrate in a nitrogen atmosphere through arc ion plating to form an AlTiN coating, depositing a AlTiCr target on the surface of the AlTiN coating in the nitrogen atmosphere through arc ion plating to form an AlTiCrN coating, and depositing a AlTiCrSiB target on the surface of the AlTiCrN coating in the nitrogen atmosphere through arc ion plating to form a AlTiCrSiBN coating.

Inventors

  • ZHANG WENKE
  • LU PAN
  • CHEN XIMIN
  • YAN YAN

Assignees

  • 成都美奢锐新材料有限公司

Dates

Publication Date
20260512
Application Date
20251231

Claims (8)

  1. 1. The multi-element composite coating cutter is characterized by comprising a substrate, an AlTiN coating, an AlTiCrN coating and a AlTiCrSiBN coating which are sequentially deposited on the substrate.
  2. 2. The multi-component composite coated cutting tool according to claim 1, wherein the multi-component composite coated cutting tool comprises, in atomic percent: in the AlTiN coating, the Al accounts for 30-33 at%, the Ti accounts for 20-22 at%, and the balance is N; In the AlTiCrN coating, 26-28 at.% of Al, 14-16 at.% of Ti, 7-9 at.% of Cr and the balance of N; in AlTiCrSiBN coating, 27-28 at.% of Al, 13-14 at.% of Ti, 4-5 at.% of Cr, 2.0-4.0 at.% of Si, 2.0-4.5 at.% of B and the balance of N.
  3. 3. The method for preparing the multi-element composite coating cutter according to claim 1 or 2, which is characterized by comprising the following steps: depositing an AlTi target on the surface of a substrate in a nitrogen atmosphere through arc ion plating to form an AlTiN coating; Depositing AlTiCr targets on the surface of the AlTiN coating layer in a nitrogen atmosphere through arc ion plating to form an AlTiCrN coating layer; The AlTiCrSiB target was deposited on the AlTiCrN coating surface by arc ion plating under nitrogen atmosphere to form AlTiCrSiBN coating.
  4. 4. A method of preparation as claimed in claim 3, wherein: The deposition parameters of the AlTiN coating are that the flow rate of the introduced nitrogen is 1300sccm, the AlTi target current is 200A, the substrate bias voltage is 60V, and the coating time is 50min; The deposition parameters of the AlTiCrN coating are that the flow rate of the introduced nitrogen is 1400sccm, the AlTiCr target current is 200A, the substrate bias voltage is 80V, and the coating time is 40min; The deposition parameters of AlTiCrSiBN coating are that the flow rate of the introduced nitrogen is 160 sccm, the AlTiCrSiB target current is 200A, the substrate bias is 100V, and the coating time is 40min.
  5. 5. The method of claim 3, wherein the ratio of Al to Ti in the AlTi target is 0.67:0.33, the ratio of Al to Ti to Cr in the AlTiCr target is 6:3:1, and the ratio of Al, ti, cr, si, B in the AlTiCrSiB target is 5:3:1:a (1-a), a=0.3, 0.5, or 0.7.
  6. 6. The method of claim 3, further comprising pretreating the substrate by sand blasting and cleaning the substrate, and by plasma etching the substrate.
  7. 7. The method of claim 6, wherein the sandblasting pressure is 0.2-0.3 MPa, the plasma etching process is performed at a temperature of 500-600 ℃ and a flow rate of 300sccm, the substrate bias voltage is 300V, and the etching time is 60min.
  8. 8. A dry processing method of titanium alloy is characterized in that the multi-component composite coating cutter as set forth in claim 1 or 2 is adopted for cutting processing.

Description

Multi-element composite coating cutter and preparation method and application thereof Technical Field The invention relates to the technical field of coated cutters and dry machining, in particular to a multi-element composite coated cutter and a preparation method and application thereof. Background With the continuous improvement of the cutting precision and efficiency standard of the tool in the mechanical manufacturing industry and the appearance of difficult-to-process materials such as titanium alloy, the development and optimization of novel hard coating tools with excellent comprehensive properties are becoming research hot spots. In particular, dry machining of titanium alloys has been one of the most significant challenges faced by cemented carbide cutting tools. The dry cutting principle refers to a technique of not using any cutting fluid during cutting, and a coating material of a coating tool used in conventional dry cutting is ternary nitride (TiAlN and/or TiSiN). However, during machining, an increase in cutting speed is accompanied by a significant increase in the temperature of the cutting area, which in turn activates the diffusion and oxidation mechanisms of tool wear. Therefore, the conventional nitride coating cannot meet the application requirements under severe conditions due to insufficient hardness or wear resistance and other performances. Disclosure of Invention The technical problem to be solved by the invention is to provide a multi-element composite coating cutter with high hardness, excellent high-temperature oxidation resistance and wear resistance, which can meet the dry processing requirements of difficult-to-process materials such as titanium alloy and the like, and a preparation method and application thereof, wherein the technical scheme is as follows: The multi-element composite coating cutter comprises a substrate, and an AlTiN coating, an AlTiCrN coating and a AlTiCrSiBN coating which are sequentially deposited on the substrate. As a further improvement of the multi-component composite coating cutter, the following components are contained in atom percent: in the AlTiN coating, the Al accounts for 30-33 at%, the Ti accounts for 20-22 at%, and the balance is N; In the AlTiCrN coating, 26-28 at.% of Al, 14-16 at.% of Ti, 7-9 at.% of Cr and the balance of N; in AlTiCrSiBN coating, 27-28 at.% of Al, 13-14 at.% of Ti, 4-5 at.% of Cr, 2.0-4.0 at.% of Si, 2.0-4.5 at.% of B and the balance of N. The preparation method of the multi-element composite coating cutter comprises the following steps: depositing an AlTi target on the surface of a substrate in a nitrogen atmosphere through arc ion plating to form an AlTiN coating; Depositing AlTiCr targets on the surface of the AlTiN coating layer in a nitrogen atmosphere through arc ion plating to form an AlTiCrN coating layer; The AlTiCrSiB target was deposited on the AlTiCrN coating surface by arc ion plating under nitrogen atmosphere to form AlTiCrSiBN coating. As a further improvement of the above preparation method: The deposition parameters of the AlTiN coating are that the flow rate of the introduced nitrogen is 1300sccm, the AlTi target current is 200A, the substrate bias voltage is 60V, and the coating time is 50min; The deposition parameters of the AlTiCrN coating are that the flow rate of the introduced nitrogen is 1400sccm, the AlTiCr target current is 200A, the substrate bias voltage is 80V, and the coating time is 40min; The deposition parameters of AlTiCrSiBN coating are that the flow rate of the introduced nitrogen is 160 sccm, the AlTiCrSiB target current is 200A, the substrate bias is 100V, and the coating time is 40min. As a further improvement of the preparation method, the atomic percentage ratio of Al and Ti in the AlTi target is 0.67:0.33, the atomic percentage ratio of Al, ti and Cr in the AlTiCr target is 6:3:1, and the atomic percentage ratio of Al, ti, cr, si, B in the AlTiCrSiB target is 5:3:1:a (1-a), a=0.3, 0.5 or 0.7. The preparation method is further improved by the steps of pretreating the substrate, wherein the pretreatment comprises the steps of carrying out sand blasting treatment and cleaning treatment on the substrate, and carrying out plasma etching treatment on the substrate. The preparation method is further improved in that the sand blasting pressure is 0.2-0.3 MPa in sand blasting treatment, the parameters of plasma etching treatment are that the flow rate of argon is 300sccm, the vacuum temperature is 500-600 ℃, the substrate bias voltage is 300V, and the etching time is 60min. The dry processing method of the titanium alloy adopts the multi-element composite coating cutter to carry out cutting processing. The multi-element composite coating cutter and the preparation method and application thereof have the following advantages: (1) In the multi-element composite coating cutter, the AlTiN coating at the bottom layer is used as a transition layer, can form good metallurgical bonding with a