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TiCp/M2 high-speed steel composite material and SPS (spark plasma sintering) preparation method thereof

A technology of composite materials and high-speed steel, applied in the field of powder metallurgy, to achieve the effects of convenient operation, improved solubility and controllable content

Active Publication Date: 2013-07-03
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, there is no literature report on the preparation of high-speed steel composite materials reinforced by fine TiC particles by combining high-energy ball milling technology and spark plasma sintering technology

Method used

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  • TiCp/M2 high-speed steel composite material and SPS (spark plasma sintering) preparation method thereof
  • TiCp/M2 high-speed steel composite material and SPS (spark plasma sintering) preparation method thereof
  • TiCp/M2 high-speed steel composite material and SPS (spark plasma sintering) preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0038] A kind of TiC prepared by SPS p The method for / M2 high-speed steel composite material comprises the following steps and process conditions thereof:

[0039] Step 1: Ingredients and Mixing

[0040] The M2 high-speed steel powder and TiC powder are proportioned according to the following volume percentages: M2 high-speed steel 95.00%, TiC 5.00%, and the powders are put into a V-shaped mixer for dry mixing for 2 hours.

[0041] The particle size of M2 high-speed steel is less than 147μm, and the components and their mass percentages are: C0.83%, Mn0.27%, Si0.32%, W5.12%, Mo5.00%, Cr3.13%, V1.97% , the balance is Fe, containing unavoidable trace impurities; the average particle size of TiC particles is 1-3 μm, and the purity is ≥99.5%.

[0042] Step 2: High energy ball milling

[0043] TiC after dry blending in step 1 p / M2 high-speed steel mixed powder is put into a planetary ball mill for high-energy ball milling. The material of the balls is stainless steel. The bal...

Embodiment 2

[0048] A kind of TiC prepared by SPS p The method for / M2 high-speed steel composite material comprises the following steps and process conditions thereof:

[0049] Step 1: Ingredients and Mixing

[0050] The M2 high-speed steel powder and TiC powder are proportioned according to the following volume percentages: M2 high-speed steel 95.00%, TiC 5.00%, and the powder is put into a V-shaped mixer for dry mixing for 6 hours.

[0051] The particle size of M2 high-speed steel is less than 147μm, and the components and their mass percentages are: C0.83%, Mn0.27%, Si0.32%, W5.12%, Mo5.00%, Cr3.13%, V1.97% , the balance is Fe, containing unavoidable trace impurities; the average particle size of TiC particles is 1-3 μm, and the purity is ≥99.5%.

[0052] Step 2: High energy ball milling

[0053] TiC after dry blending in step 1 p / M2 high-speed steel mixed powder is put into a planetary ball mill for high-energy ball milling. The material of the balls is stainless steel. The ball-...

Embodiment 3

[0057] A kind of TiC prepared by SPS p The method for the / M2 high speed steel composite material comprises the following steps and process conditions thereof:

[0058] Step 1: Ingredients and Mixing

[0059] The M2 high-speed steel powder and TiC powder are proportioned according to the following volume percentages: M2 high-speed steel 90.00%, TiC 10.00%, and the powders are put into a V-shaped mixer for dry mixing for 12 hours.

[0060] The particle size of M2 high-speed steel is less than 147μm, and the components and their mass percentages are: C0.83%, Mn0.27%, Si0.32%, W5.12%, Mo5.00%, Cr3.13%, V1.97% , the balance is Fe, containing unavoidable trace impurities; the average particle size of TiC particles is 1-3 μm, and the purity is ≥99.5%.

[0061] Step 2: High energy ball milling

[0062] TiC after dry blending in step 1 p / M2 high-speed steel mixed powder is put into a planetary ball mill for high-energy ball milling. The material of the balls is stainless steel. T...

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Abstract

The invention relates to a TiCp / M2 high-speed steel composite material and an SPS (spark plasma sintering) preparation method thereof. The method comprises the following steps: firstly mixing powder according to the mixture ratio of raw material powder; then performing high-energy ball milling till the average particle size of M2 high-speed steel powder particles is refined to below 20 mu m and TiC is refined to below 200nm; and further adopting SPS to perform fast sintering on the composite powder after high-energy ball milling. The obtained composite material comprises reinforcement phase nano-scale hard particles TiC and a precipitated submicron-scale M6C type composite carbide, a matrix is of M2 high-speed steel, a reinforcement body is of TiC particles, the TiC particles are dispersed and distributed in the matrix in the nano-scale particle size, and as for the composite material, the relative density is more than 98.5%, the hardness is 56-59HRC, and the volume wear loss is 1.77*10<-1>-1.34*10<-1>mm<3>. The process disclosed by the invention is simple and convenient, and the obtained material has the advantages of good anti-bending performance, high density and excellent comprehensive performances.

Description

technical field [0001] The present invention relates to powder metallurgy technology, specifically refers to a TiC particle-reinforced high-speed steel composite material (TiC p / M2) and its methods. Background technique [0002] High-speed steel is widely used in the manufacture of cutting tools, forming tools and wear-resistant parts due to its excellent mechanical properties and wear resistance. The high-speed steel (powder metallurgy high-speed steel) produced by the powder metallurgy process can completely eliminate the inhomogeneity of the structure and composition, and greatly reduce the particle size of the carbide (1-4μm), so it has higher hardness and durability than ordinary high-speed steel. High abrasiveness and impact toughness, the service life of the cutting tools manufactured by it is higher than that of ordinary high-speed steel (generally 2 to 3 times), and it can replace cemented carbide tools in the case of large impact loads. In order to expand the ap...

Claims

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Application Information

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IPC IPC(8): B22F3/105C22C38/24C22C32/00
Inventor 肖志瑜李小峰罗飞吴苑标张文
Owner SOUTH CHINA UNIV OF TECH
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