阅读说明：本技术 一种耐磨刀具用石墨烯增强钴基复合材料的制备方法 (Preparation method of graphene reinforced cobalt-based composite material for wear-resistant cutter ) 是由 杨斌 王广欣 唐坤 游龙 柳培 刘坤定 刘晨璐 于 2020-07-02 设计创作，主要内容包括：本发明涉及一种耐磨刀具用石墨烯增强钴基复合材料的制备方法。石墨烯增强钴基复合材料以高纯电解钴片为基体,以氧化石墨烯、钨、铬、硅、锰、铁等粉体颗粒为增强相,所述制备方法将高纯电解钴片通过高能行星球磨方式制备得到高纯钴粉体,与增强体以适当配比在真空热压炉中,保温保压,将粉体一步到位制成坯料,减少工艺步骤,缩短了生产周期,且工艺流程简单,工艺参数稳定,节约了成本；石墨烯增强钴基复合材料质量优越,耐磨性和切削性能好,高温力学性能优越,是理想的耐磨刀具、切削刀具及其他耐磨部件用合金材料。(The invention relates to a preparation method of a graphene reinforced cobalt-based composite material for a wear-resistant cutter. The preparation method comprises the steps of preparing high-purity electrolytic cobalt sheets into high-purity cobalt powder in a high-energy planetary ball milling mode, mixing the high-purity electrolytic cobalt sheets with a reinforcement body in a vacuum hot pressing furnace in a proper ratio, preserving heat and pressure, and preparing the powder into a blank in one step, so that the process steps are reduced, the production period is shortened, the process flow is simple, the process parameters are stable, and the cost is saved; the graphene reinforced cobalt-based composite material has the advantages of excellent quality, good wear resistance and cutting performance and excellent high-temperature mechanical property, and is an ideal alloy material for wear-resistant cutters, cutting cutters and other wear-resistant components.)

1. A preparation method of a graphene reinforced cobalt-based composite material for a wear-resistant cutter comprises the following steps:

the method comprises the following steps: weighing and mixing the ingredients in a preset proportion;

step two: carrying out vacuum, hot pressing and heat preservation treatment on the mixed ingredients to obtain a blank;

step three: and carrying out aging treatment, face milling and cleaning on the blank.

2. The method for preparing the graphene-reinforced cobalt-based composite material for the wear-resistant cutter according to claim 1, wherein the graphene-reinforced cobalt-based composite material comprises the following steps: the ingredients in the first step are high-purity electrolytic cobalt sheets, graphene, tungsten, chromium, silicon, manganese and iron, the ingredients are placed into a planetary ball mill, liquid nitrogen is introduced into the planetary ball mill for ball milling and mixing, and the content of the graphene is 1.0-1.5 wt% of the mass of the aluminum matrix; the contents of the tungsten, the chromium, the silicon and the manganese are respectively as follows by taking the mass of the aluminum matrix as a base number: 3.0 to 6.0 wt% of tungsten, 25.0 to 32.0 wt% of chromium, 0.5 to 1.1 wt% of silicon, and 0.2 to 0.8 wt% of manganese.

3. The method for preparing the graphene-reinforced cobalt-based composite material for the wear-resistant cutter according to claim 1, wherein the graphene-reinforced cobalt-based composite material comprises the following steps: and step two, placing the ingredients into a high-strength graphite mold, placing the high-strength graphite mold into a vacuum hot-pressing furnace, vacuumizing to 10-3Pa, heating to 1050-1180 ℃ at a heating rate of 5-10 ℃/min, pressing at 40MPa in a heat preservation state, and preserving heat and pressure for 6-12 hours to obtain the graphene reinforced cobalt-based composite material blank.

4. The method for preparing the graphene-reinforced cobalt-based composite material for the wear-resistant cutter according to claim 1, wherein the graphene-reinforced cobalt-based composite material comprises the following steps: and step three, putting the blank into a vacuum annealing furnace, carrying out aging treatment for 2 hours at 900 ℃, taking out after furnace cooling, and carrying out face milling and cleaning on the blank.

Technical Field

The invention relates to the technical field of composite materials, in particular to a preparation method of a graphene reinforced cobalt-based composite material for a wear-resistant cutter.

Background

The cobalt-based alloy is a high-temperature wear-resistant alloy with good mechanical property, corrosion resistance, wear resistance and high-temperature oxidation resistance, the graphene is a two-dimensional nano material composed of carbon atoms, due to the unique two-dimensional honeycomb crystal structure and the extremely high bond strength of the graphene, the graphene is the currently known material with the highest specific strength and the hardest specific strength in the world, the Young modulus of the graphene is about 1100GPa, the breaking strength is about 130GPa, the Young modulus of the graphene is 6 times and 60 times of that of the best ultrahigh-strength steel respectively, and the graphene also has the characteristics of high barrier and shielding and is an excellent anti-corrosion material. The existing preparation method and the existing process flow have high cost and complicated steps, and the cobalt-based composite material has insufficient strength, wear resistance and corrosion resistance, so that the prior art needs to be improved.

Disclosure of Invention

In view of the problems in the prior art, the invention discloses a preparation method of a graphene reinforced cobalt-based composite material for a wear-resistant cutter, which comprises the following steps:

the method comprises the following steps: weighing and mixing the ingredients in a preset proportion;

step two: carrying out vacuum, hot pressing and heat preservation treatment on the mixed ingredients to obtain a blank;

step three: and carrying out aging treatment, face milling and cleaning on the blank.

As a preferable scheme of the invention, in the step one, the ingredients are high-purity electrolytic cobalt sheets, graphene, tungsten, chromium, silicon, manganese and iron, the ingredients are put into a planetary ball mill, liquid nitrogen is introduced for ball milling and mixing, and the content of the graphene is 1.0-1.5 wt% of the mass of the aluminum matrix; the contents of the tungsten, the chromium, the silicon and the manganese are respectively as follows by taking the mass of the aluminum matrix as a base number: 3.0 to 6.0 wt% of tungsten, 25.0 to 32.0 wt% of chromium, 0.5 to 1.1 wt% of silicon, and 0.2 to 0.8 wt% of manganese.

As a preferable scheme of the invention, in the second step, the ingredients are placed in a high-strength graphite mold, the high-strength graphite mold is placed in a vacuum hot-pressing furnace, the high-strength graphite mold is firstly vacuumized to 10 < -3 > Pa, then the temperature is increased to 1050 ℃ -1180 ℃ at a heating rate of 5-10 ℃/min, then the high-strength graphite mold is pressed at a pressure of 40MPa in a heat preservation state, and the heat preservation and pressure maintenance are carried out for 6-12 hours, so as to obtain the graphene reinforced cobalt-based composite material blank.

As a preferable scheme of the invention, in the third step, the blank is put into a vacuum annealing furnace, aging treatment is carried out for 2 hours at 900 ℃, the blank is taken out after furnace cooling, and the blank is milled and cleaned.

The invention has the beneficial effects that: the graphene reinforced cobalt-based composite material takes a high-purity electrolytic cobalt sheet as a matrix and powder particles of graphene oxide, tungsten, chromium, silicon, manganese, iron and the like as a reinforcing phase, the preparation method prepares high-purity electrolytic cobalt powder from the high-purity electrolytic cobalt sheet in a high-energy planetary ball milling mode, the high-purity electrolytic cobalt powder and a reinforcing body are mixed in a vacuum hot pressing furnace in a proper ratio, the temperature and the pressure are kept, the powder is prepared into a blank in one step, the process steps are reduced, the production period is shortened, the process flow is simple, the process parameters are stable, and the cost is saved; the graphene reinforced cobalt-based composite material has the advantages of excellent quality, good wear resistance and cutting performance and excellent high-temperature mechanical property, and is an ideal alloy material for wear-resistant cutters, cutting cutters and other wear-resistant components.

Drawings

FIG. 1 is a schematic process flow diagram of the present invention.

Detailed Description