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Tin double-layer coating on the surface of a tool and mold material and preparation method thereof

A tool and mold, double-layer technology, applied in the field of materials, can solve the problems of poor coating effect, wear and scratch, and affect the effect, and achieve the effect of small friction coefficient, smooth surface and easy operation

Active Publication Date: 2016-03-02
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, when the coating effect is not good, or the film layer is damaged, in many cases in production, the preparation of "chemical removal solution" is used to remove the coating, but this method will inevitably damage the substrate and affect the effect of re-coating
Coated cutting tools and molds will also have different degrees of wear and scratches after repeated use. If they are discarded due to partial surface failure, it will cause a huge waste of resources

Method used

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  • Tin double-layer coating on the surface of a tool and mold material and preparation method thereof
  • Tin double-layer coating on the surface of a tool and mold material and preparation method thereof
  • Tin double-layer coating on the surface of a tool and mold material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] The AIP-01 multi-arc ion coating machine is used, manufactured by Shenyang Yuankehang Company. The magnetic filter device inside the coating machine is manufactured by the Institute of Low Energy Nuclear Physics of Beijing Normal University. The workpiece used is wire-cut into 10mm×10mm ×4mm block material (M2 steel);

[0038] (1) Firstly, after the workpiece is mechanically ground and polished, it is cleaned with ultrasonic waves in acetone and alcohol for 15 minutes each, and then dried;

[0039] (2) Put the dried workpiece into the multi-arc ion coating machine, the sample is facing the target source, 150mm away from the target surface, the sample revolves / rotates, and then vacuumizes step by step with a mechanical pump, Roots pump, and diffusion pump to 6.5×10 -3 Pa, the temperature is controlled at 200-230°C, the bias voltage is -700V, and the duty cycle is 40%; the single arc target source is started, the current is 70A, and the voltage is 25V; 5min;

[0040] (...

Embodiment 2

[0046] The difference between this embodiment and embodiment 1 lies in that the coating time in step (4) is 60 minutes.

[0047] The thickness of the coating is measured by grinding the cross-sectional metallographic sample of the workpiece in Example 2, and measuring it under a scanning electron microscope (SEM). The total thickness of the coating is about 2.35 μm.

Embodiment 3

[0049] The difference between this embodiment and Embodiment 1 is that the workpiece is a cemented carbide milling insert of the brand YW1 produced by Zhuzhou Diamond Cutting Tool Co., Ltd.

[0050] The coating of this embodiment is the same as that of Embodiment 1, and the total thickness is about 2.1 μm.

[0051] The surface roughness of embodiment 1~3 and comparative example 1 and 2 adopts BMTExpert3D surface topography instrument to measure, and the test of membrane base binding force uses NHT / MST / AFM / type multifunctional nano-mechanical testing system (instrument model is OpenPIatformtab, supply The manufacturer is Swiss CSM Instrument Co., Ltd.), the equipment is suitable for the thickness of the film layer within the range of 0-1mm; the loading force range is 0.05-30N, the loading resolution is 0.3mN; the scratch speed is 0.4-600mm / min; the indenter It is a diamond indenter with a cone angle of 120° and a tip radius R=0.1mm.

[0052] The measurement parameters of the ...

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Abstract

The invention discloses a TiN double-layer plated layer on the surface of a tool / mold material and a preparation method of the TiN double-layer plated layer. The preparation method comprises the following steps of: (1) mechanically grinding an ion plated TiN layer on the surface of the tool / mold material and then cleaning; and (2) plating the TiN layer by using a magnetic filtering ion plating device, so as to obtain the TiN double-layer plated layer. The TiN double-layer plated layer is smooth in surface, high in film-base binding force, good in wear resistance, beneficial to increase of the service life of a mold; machining quality of a plated film is high; the TiN double-layer plated layer is applicable to coated layer cutters and coated layer molds which are poor in coating layer effect, have damaged the film layers or used to a certain extent, as well as repairing of the coated layer cutters and the coated layer molds. Electronic and mechanical automatic control is employed in the film plating process, so that the TiN double-layer plated layer is applicable to production in bath.

Description

technical field [0001] The invention relates to the field of materials, in particular to a TiN double-layer coating on the surface of a cutting tool and a molding die material and a preparation method thereof. Background technique [0002] In the machinery manufacturing industry, most of the machining methods of mechanical parts are cutting and mold forming. High-speed steel and cemented carbide are one of the most used tool mold materials in the world today. At present, tools and molds are developing in the direction of multiple types, high performance, and high precision, and processing costs are also rising. Prolonging the service life of tools and molds, reducing costs, and saving resources are already placed in front of the tool and mold industry. an important question. [0003] Coating a hard film on the surface of the tool and mold, the substrate maintains good toughness and high strength, and the hard film has high wear resistance and low friction coefficient, which...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C14/06C23C14/32
Inventor 钟喜春张启沛邱万奇匡同春曾德长刘仲武余红雅
Owner SOUTH CHINA UNIV OF TECH