阅读说明：本技术 一种高致密性钨基硬质合金棒生产工艺 (Production process of high-compactness tungsten-based hard alloy rod ) 是由 唐晓东 于 2020-06-23 设计创作，主要内容包括：本发明公开了一种高致密性钨基硬质合金棒生产工艺,包括以下步骤：配料原料,进行原料的配置,所述原料包括WC粉末、Co基合金颗粒、抑制剂和Cr-(3)C-(2)粉末；磨制,将原料和钢球导入球磨机,进行3～4h球磨,干燥后筛选,得到混合粉料；挤出,将混合粉料导入挤出机,在挤出模具配合下,得到一定直径的合金棒；热处理,将棒料毛坯放入真空炉,进行烧结,得到高致密性钨基硬质合金棒。本发明所述的高致密性钨基硬质合金棒生产工艺,以Co基合金颗粒代替Co作为硬质合金中的粘结相,能够降低合金熔点,并利用抑制剂有效抑制WC粉末颗粒变大的问题,使得整体晶粒度更细,制成的合金棒致密性好,表面质量稳定性高。(The invention discloses a production process of a high-compactness tungsten-based hard alloy rod, which comprises the following steps of: preparing raw materials, and preparing the raw materials, wherein the raw materials comprise WC powder, Co-based alloy particles, an inhibitor and Cr 3 C 2 Powder; grinding, namely introducing the raw materials and the steel balls into a ball mill, carrying out ball milling for 3-4 h, drying and screening to obtain mixed powder; extruding, namely introducing the mixed powder into an extruder, and obtaining an alloy rod with a certain diameter under the coordination of an extrusion die; and (4) performing heat treatment, namely putting the bar blank into a vacuum furnace, and sintering to obtain the high-compactness tungsten-based hard alloy bar. According to the production process of the high-compactness tungsten-based hard alloy rod, Co-based alloy particles are used for replacing Co as a binding phase in the hard alloy, so that the melting point of the alloy can be reduced, and the problem that WC powder particles are enlarged is effectively inhibited by using an inhibitor, so that the tungsten-based hard alloy rod is enabled to be high in compactnessThe obtained alloy rod has the advantages of finer overall grain size, good compactness and high surface quality stability.)

1. A production process of a high-compactness tungsten-based hard alloy rod is characterized by comprising the following steps:

preparing raw materials, and preparing the raw materials, wherein the raw materials comprise WC powder, Co-based alloy particles, an inhibitor and Cr₃C₂Powder;

grinding, namely introducing the raw materials and the steel balls into a ball mill, carrying out ball milling for 3-4 h, drying and screening to obtain mixed powder;

extruding, namely introducing the mixed powder into an extruder, and obtaining an alloy rod with a certain diameter under the coordination of an extrusion die;

and (4) performing heat treatment, namely putting the bar blank into a vacuum furnace, and sintering to obtain the high-compactness tungsten-based hard alloy bar.

2. The production process of the high-compactness tungsten-based hard alloy rod according to claim 1, wherein the raw materials comprise the following components in parts by weight: 95-96 parts of WC powder, 3-5 parts of Co-based alloy particles, 0.2-0.4 part of inhibitor and Cr₃C₂0.3-0.5 part of powder.

3. The process for producing a high-compactness tungsten-based hard alloy rod according to claim 1, wherein the Co-based alloy particles are Co-Ni-Cr-Mo alloy particles, Co-Ni-Cr-Mo-W-Fe alloy particles, or Co-Cr-Mo alloy particles.

4. The process for producing a high-compactness tungsten-based cemented carbide rod according to claim 1, wherein the inhibitor is VC.

5. The production process of the high-compactness tungsten-based hard alloy rod according to claim 1, wherein in the sintering step, the temperature is raised from room temperature to 400-450 ℃ within 5 minutes, then raised to 1600 ℃ within 20 minutes, raised to 1800 ℃ within 5 minutes, and then kept at the temperature for 25-35 minutes, and then lowered.

Technical Field

The invention relates to the technical field of alloy rod production, in particular to a production process of a high-compactness tungsten-based hard alloy rod.

Background

The tungsten-based hard alloy bar has the characteristics of high strength, high toughness, high hardness, high corrosion resistance, high wear resistance and the like, is widely applied to the manufacturing fields of energy, metallurgy, electronic information, machining, aerospace, national defense military industry, nuclear industry and the like, and formed material systems comprise W-Ni-Fe, W-Ni-Cu, W-Cu alloy and the like.

In recent years, researchers at home and abroad carry out intensive research around key technologies of novel tungsten-based alloys such as structure refinement, deformation strengthening, forming deep processing technologies and the like, tungsten-based alloy bars are developed in the directions of 'superfine', 'ultra-pure', 'ultra-uniform' and the like, and fine-grained and superfine/nano tungsten-based hard alloy bars with good structure uniformity and compactness gradually become research directions and industrial development trends in the industry. In the existing production of tungsten-based hard alloy bars, the technical bottleneck problems of poor structural uniformity, unstable surface quality, low efficiency and the like of the alloy bars still exist, and improvement is needed.

Disclosure of Invention

The invention aims to provide a production process of a high-compactness tungsten-based hard alloy rod, which is used for efficiently producing the tungsten-based hard alloy rod and improving the uniformity of the structure and the quality stability.

In order to achieve the purpose, the invention adopts the following technical scheme:

a production process of a high-compactness tungsten-based hard alloy rod comprises the following steps:

preparing raw materials, and preparing the raw materials, wherein the raw materials comprise WC powder, Co-based alloy particles, an inhibitor and Cr₃C₂Powder;

grinding, namely introducing the raw materials and the steel balls into a ball mill, carrying out ball milling for 3-4 h, drying and screening to obtain mixed powder;

extruding, namely introducing the mixed powder into an extruder, and obtaining an alloy rod with a certain diameter under the coordination of an extrusion die;

and (4) performing heat treatment, namely putting the bar blank into a vacuum furnace, and sintering to obtain the high-compactness tungsten-based hard alloy bar.

Wherein the raw materials comprise the following components in parts by weight: 95-96 parts of WC powder, 3-5 parts of Co-based alloy particles, 0.2-0.4 part of inhibitor and Cr₃C₂0.3-0.5 part of powder.

Wherein the Co-based alloy particles adopt Co-Ni-Cr-Mo alloy particles, Co-Ni-Cr-Mo-W-Fe alloy particles or Co-Cr-Mo alloy particles.

Wherein the inhibitor adopts VC.

In the sintering step, the temperature is firstly increased from room temperature to 400-450 ℃ within 5 minutes, then is increased to 1600 ℃ after 20 minutes, is increased to 1800 ℃ within 5 minutes, and is reduced after heat preservation for 25-35 minutes.

The invention has the beneficial effects that: a production process of a high-compactness tungsten-based hard alloy rod uses Co-based alloy particles to replace Co as a binding phase in hard alloy, uses a vacuum sintering technology to prepare an ultra-fine crystal tungsten-based hard alloy rod, can reduce the melting point of the alloy, and effectively inhibits the problem that WC powder particles become large by using an inhibitor to obtain WC alloy grains which are more uniform and fine, so that the overall grain size is finer, the prepared alloy rod has good compactness and high surface quality stability, the production process is mature, and the production efficiency is high.

Detailed Description

The technical solution of the present invention is further illustrated by the following specific examples.

Example 1:

a production process of a high-compactness tungsten-based hard alloy rod comprises the following steps:

preparing raw materials, and preparing the raw materials, wherein the raw materials comprise WC powder, Co-based alloy particles, an inhibitor and Cr₃C₂The powder comprises the following raw materials in parts by weight: 95 parts of WC powder, 4.1 parts of Co-based alloy particles, 0.4 part of inhibitor and Cr₃C₂0.5 part of powder, and mixing raw materials, wherein in the embodiment, Co-Ni-Cr-Mo alloy particles are adopted as the Co-based alloy particles, and VC is adopted as the inhibitor, so that the problem of enlargement of WC powder particles is effectively inhibited, and more uniform and finer WC alloy grains are obtained;

grinding, namely introducing the raw materials and the steel balls into a ball mill, performing ball milling for 3.5 hours, drying and screening to obtain mixed powder;

extruding, namely introducing the mixed powder into an extruder, and obtaining an alloy rod with a certain diameter under the coordination of an extrusion die;

and (3) performing heat treatment, namely putting the bar blank into a vacuum furnace, sintering, heating from room temperature to 400 ℃ within 5 minutes, heating to 1600 ℃ within 20 minutes, heating to 1800 ℃ within 5 minutes, and cooling after keeping the temperature for 35 minutes to obtain the high-compactness tungsten-based hard alloy bar.

Example 2:

a production process of a high-compactness tungsten-based hard alloy rod comprises the following steps:

preparing raw materials, and configuring the raw materials, wherein the raw materials comprise WC powder, Co-based alloy particles, an inhibitor and Cr3C2 powder, and effectively balancing and optimizing the alloyThe carbon content of the alloy rod is smaller, the product porosity is smaller, the crystal grain distribution is more uniform, the compactness is better, the strength, the toughness and the impact resistance of the alloy rod are effectively improved, and the raw materials comprise the following components in parts by weight: 96 parts of WC powder, 3.3 parts of Co-based alloy particles, 0.3 part of inhibitor and Cr₃C₂0.4 part of powder, and mixing raw materials, wherein in the embodiment, Co-Ni-Cr-Mo-W-Fe alloy particles are adopted as the Co-based alloy particles, and VC is adopted as the inhibitor, so that the problem of enlargement of WC powder particles is effectively inhibited, and more uniform and finer WC alloy grains are obtained;

grinding, namely introducing the raw materials and steel balls into a ball mill, performing ball milling for 4 hours, drying and screening to obtain mixed powder, wherein the particle size reaches 0.3-0.5 um;

extruding, namely introducing the mixed powder into an extruder, and obtaining an alloy rod with a certain diameter under the coordination of an extrusion die;

and (2) heat treatment, namely putting the bar blank into a vacuum furnace, sintering, heating from room temperature to 450 ℃ within 5 minutes, heating to 1600 ℃ within 20 minutes, heating to 1800 ℃ within 5 minutes, keeping the temperature for 25-35 minutes, and then cooling to obtain the high-compactness tungsten-based hard alloy bar, wherein the high-compactness tungsten-based hard alloy bar has the hardness of more than or equal to 90HRA, the density of less than or equal to 7.5g/cm, the bending strength of 200kg/mm, the compression strength of 500 kg/mm and excellent comprehensive performance through detection.

The above description is only a preferred embodiment of the present invention, and for those skilled in the art, the present invention should not be limited by the description of the present invention, which should be interpreted as a limitation.