Preparation method of high-strength and high-toughness titanium alloy material cutter

A technology of tough titanium alloy and titanium alloy, which is applied in the field of preparation of high-strength and high-toughness titanium alloy material cutting tools, can solve the problems such as the decrease of bending strength and impact toughness of cutting tool materials, the inapplicability of high-efficiency processing of difficult-to-machine materials, and the impact on the performance of cutting tools. , to achieve the effect of eliminating harmful elements, reducing friction coefficient and strong crack growth resistance

Inactive Publication Date: 2019-08-16
阳江十八子刀剪制品有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] With the development of science and technology, more and more difficult-to-machine materials are used. In order to meet this requirement, the modern machining industry is developing in the direction of high precision, high-speed cutting, dry cutting technology, green manufacturing and cost reduction. Because of this, people have put forward higher requirements for manufacturing tools. Although the hardness of commonly used tools such as high-speed steel tools (hardness 66-70HRC) and cemented carbide tools (hardness 89-93.5HRC) are very high, but It is no longer suitable for efficient machining of difficult-to-machine materials
Although various measures can be taken to improve the hardness and wear resistance of the tool material, it will inevitably lead to a decrease in the bending strength and impact toughness of the tool material, that is, the material becomes brittle, thereby affecting the performance of the tool

Method used

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  • Preparation method of high-strength and high-toughness titanium alloy material cutter
  • Preparation method of high-strength and high-toughness titanium alloy material cutter
  • Preparation method of high-strength and high-toughness titanium alloy material cutter

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Experimental program
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Effect test

Embodiment 1

[0027] Prepare the raw materials first, the density of the raw material is titanium alloy material, the prepared titanium alloy material is sent to the stamping workshop to cut the material according to the size of the knife, the size and thickness of the knife sample, and the knife blank is opened, and then the knife blank is heat treated, usually The annealing temperature of α alloy and (α+β) alloy is selected at 120-200°C below the (α+β)-→β phase transformation point; solid solution and aging treatment are rapidly cooled from the high temperature zone to obtain martensitic α′ phase and the metastable β phase, and then keep warm in the middle temperature zone to decompose these metastable phases to obtain finely dispersed second phase particles such as the α phase or compounds. Usually (α+β) alloys are quenched at (α+β)-→ It is carried out at 40-100°C below the β-phase transformation point, and the metastable β-alloy is quenched at 40-80°C above the (α+β)-→β-phase transformat...

Embodiment 2

[0029] S1: Prepare raw materials; prepare BT16 alloy, the blanking temperature is 1150°C, the final temperature is controlled at about 800°C, heat preservation for 2 hours, air cooling for 2 hours, 500°C heat preservation for 6 hours, air cooling, the obtained titanium alloy is composed of primary α, intergranular β phase and phase The needle-like secondary α phase precipitated in the composition;

[0030] S2: Stamping: Send the prepared titanium alloy material into the stamping workshop to cut the material according to the size of the knife, the size and thickness of the knife sample, and cut out the blank;

[0031] S3: Heat treatment: heat-treat the knife blank by double heat treatment; the titanium alloy sample obtained after double heat treatment contains 70-80% primary α, 10-20% intergranular β phase and 5-10% The needle-like secondary α phase;

[0032] S4: Surface hydrogen infiltration: In the high-temperature furnace, the knife blank is subjected to hydrogen infiltrati...

Embodiment 3

[0042] Microscopic observation, titanium alloy is a coarse α+β two-phase structure, see figure 1 As shown in a, under a 20,000-fold electron microscope, part of the α phase in the crystal is observed side by side with dendritic vertical β grain boundary crystals, such as figure 1 As shown in b, part of the α phases are crystallized side by side in the form of columnar crystals vertically or parallel to the β grain boundaries, such as figure 1 as shown in c.

[0043] BT16 titanium alloy supply state organization such as figure 2 As shown, its basic feature is that a thin layer of black β phase is surrounded by a white α phase. The whole structure can be roughly divided into two types of regions, one is the lamellar α+β phase region, and in this phase region, α The length of the sheet is about 4 μm to 12 μm, and the thickness is about 0.5 μm to 0.6 μm. The α sheets in a microregion are parallel to each other, and the number is about 2 to 5; the other type of region is the equ...

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Abstract

The invention relates to the technical field of cutters, in particular to a preparation method of a high-strength and high-toughness titanium alloy material cutter. The preparation method comprises the following steps that S1, raw materials are prepared; S2, punching is carried out, wherein the prepared titanium alloy materials are fed into a punching workshop for cutting, and a cutter blank is cut according to the size of the cutter, and the size and the thickness of a cutter sample; S3, heat treatment is carried out, and specifically heat treatment is carried out on the cut cutter blank; S4,surface hydrogen permeation is carried out; and S5, film coating is carried out, wherein a Ti-DLC film is plated on the surface of the cutter blank by using a magnetron sputtering method, microporesin the DLC film layer are plugged through fluorine-containing acrylate monomers, so that the wear resistance of the cutter is improved, the toughness of a substrate is not reduced, the coating has a fine structure, so that the compressive stress is produced inside the coating, the anti-crack propagation capability is high, and the service performance of the cutter is improved.

Description

technical field [0001] The invention relates to the technical field of cutters, in particular to a preparation method of a cutter made of a high-strength and high-toughness titanium alloy material. Background technique [0002] With the development of science and technology, more and more difficult-to-machine materials are used. In order to meet this requirement, the modern machining industry is developing in the direction of high precision, high-speed cutting, dry cutting technology, green manufacturing and cost reduction. Because of this, people have put forward higher requirements for manufacturing tools. Although the hardness of commonly used tools such as high-speed steel tools (hardness 66-70HRC) and cemented carbide tools (hardness 89-93.5HRC) are very high, but It is not suitable for efficient machining of difficult-to-machine materials. Although various measures can be taken to improve the hardness and wear resistance of the tool material, it will inevitably lead t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22F1/18C23C14/35C23C8/08C23C14/06C23C14/56
CPCC22F1/183C23C8/08C23C14/0605C23C14/352C23C14/56
Inventor 李有维李积回
Owner 阳江十八子刀剪制品有限公司
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