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Coated cutting tool for machining titanium alloy and high-temperature alloy and preparation method therefor

A technology of high-temperature alloys and titanium alloys, applied in metal processing equipment, tools for lathes, metal material coating processes, etc., can solve problems such as coating applications that have not yet been seen, and achieve improved service life and workpiece surface quality. , Low friction coefficient, good uniformity

Active Publication Date: 2021-04-20
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The relevant research on TM-B-N coatings mainly focuses on TiBN coatings; the research on HfBN, VBN, NbBN, TaBN, MoBN and other coatings is relatively small, and according to existing reports, related TMBN prepared by PVD method The coating presents a structure in which nanocrystalline boride is wrapped in an amorphous BN phase; there are no relevant reports on the application of HfBN, VBN, NbBN, TaBN, MoBN and other coatings on cutting tools

Method used

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  • Coated cutting tool for machining titanium alloy and high-temperature alloy and preparation method therefor
  • Coated cutting tool for machining titanium alloy and high-temperature alloy and preparation method therefor

Examples

Experimental program
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Effect test

Embodiment 1

[0036] A V-B-N coated cutting tool for processing titanium alloys and high-temperature alloys, the atomic percentages of each element in the V-B-N coating are: V15%, B20%, and N65%, and the V-B-N coating includes VN phases and BN phases.

[0037] In a preferred embodiment, the thickness of the V-B-N coating is 0.3 μm.

[0038] A kind of preparation method of the V-B-N coated cutting tool that titanium alloy and superalloy processing are used, comprises the following steps:

[0039] 1) Substrate pretreatment: ultrasonically clean the tool in absolute ethanol for 10 minutes, dry it with hot air, clamp it on a three-dimensionally rotatable planetary carrier, and send it into the chamber;

[0040] 2) Vacuumize the chamber: firstly evacuate to 4×10 through mechanical pump and molecular pump -5Below mbar, set the temperature of the infrared heating tube at 600°C and heat for 30 minutes until the vacuum degree of the chamber reaches 4×10 -5 After it is below mbar, set the temperatu...

Embodiment 2

[0046] An Hf-B-N coated cutting tool for processing titanium alloys and high-temperature alloys, the atomic percentage of each element in the Hf-B-N coating is: Hf55%, B15%, N30%, and the Hf-B-N coating includes HfN phase and BN phase.

[0047] In a preferred embodiment, the thickness of the Hf-B-N coating is 5 μm.

[0048] A kind of preparation method of the Hf-B-N coated cutting tool that titanium alloy and superalloy processing are used, comprises the following steps:

[0049] 1) Substrate pretreatment: ultrasonically clean the tool in absolute ethanol for 20 minutes, dry it with hot air, clamp it on a three-dimensionally rotatable planetary carrier, and send it into the chamber;

[0050] 2) Vacuumize the chamber: firstly evacuate to 4×10 through mechanical pump and molecular pump -5 Below mbar, set the temperature of the infrared heating tube at 600°C and heat for 30 minutes until the vacuum degree of the chamber reaches 4×10 -5 After it is below mbar, set the temperatu...

Embodiment 3

[0056] A Hf-Ti-B-N coated cutting tool for processing titanium alloys and high-temperature alloys, the atomic percentage of each element in the Hf-Ti-B-N coating is: Hf20%, Ti15%, B30%, N35%, the Hf -Ti-B-N coating includes HfN phase, TiN phase and BN phase.

[0057] In a preferred embodiment, the thickness of the Hf-Ti-B-N coating is 2.75 μm.

[0058] A kind of preparation method of the Hf-Ti-B-N coating cutting tool that titanium alloy and superalloy processing are used, comprises the following steps:

[0059] 1) Substrate pretreatment: ultrasonically clean the tool in absolute ethanol for 15 minutes, dry it with hot air, clamp it on a three-dimensionally rotatable planet carrier, and send it into the chamber;

[0060] 2) Vacuumize the chamber: firstly evacuate to 4×10 through mechanical pump and molecular pump -5 Below mbar, set the temperature of the infrared heating tube at 600°C and heat for 30 minutes until the vacuum degree of the chamber reaches 4×10 -5 After it is...

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Abstract

Disclosed are a coated cutting tool for machining a titanium alloy and a high-temperature alloy and a preparation method therefor. The coating of the coated cutting tool is a Me-B-N coating. The preparation method for the coated cutting tool for machining a titanium alloy and a high-temperature alloy comprises the following steps: carrying out a substrate pre-treatment step, wherein the cutting tool is cleaned and dried, and is then fed into a chamber; carrying out a chamber vacuumizing step, specifically, carrying out vacuumizing by means of a mechanical pump and a molecular pump; carrying out an ion etching step, wherein high-purity Ar is introduced into the chamber, the temperature of a heater in the chamber is maintained, a negative bias voltage is applied, ion etching is carried out on a substrate, and oxide skin and a loose layer on the surface of the cutting tool are removed; carrying out an Me-B-N series coating deposition step, wherein high-purity N2 and high-purity Ar are continuously introduced into the chamber, meanwhile, the temperature of the heater in the chamber is kept constant, a negative bias voltage is applied to the substrate, and the Me-B-N series coating with a certain thickness is deposited by using a magnetron sputtering technique or an arc plasma technique; and carrying out a cooling and sampling step, wherein a furnace body circulating cooling system is started, the chamber is opened after the chamber is cooled in a vacuum state, and a workpiece is taken out.

Description

technical field [0001] The invention relates to the technical field of tool protective coatings for cutting difficult-to-machine materials, in particular to a coated tool for machining titanium alloys and high-temperature alloys and a preparation method thereof. Background technique [0002] In the field of machining, titanium alloys and superalloys are typical difficult-to-machine materials. Titanium alloy cutting features: 1) It is easy to stick to the tool during the processing of titanium alloy, which leads to serious bond wear of the tool and reduces the service life of the tool; 2) The thermal conductivity of titanium alloy is poor, and the local high temperature generated during processing makes Titanium alloys can easily absorb oxygen and nitrogen, causing work hardening and tool chipping; 3) titanium alloys have a small elastic modulus, and the rebound is large during cutting and deformation, which can easily cause tool vibration. High temperature alloy cutting pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C14/06C23C14/35C23C14/02
CPCC23C14/0688C23C14/35C23C14/022C23C14/0641C23C14/0036B23B27/148B23B2228/105C23C14/021C23C14/0647
Inventor 王成勇林海生郑李娟匡同春邓阳王启民
Owner GUANGDONG UNIV OF TECH