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Making method for aluminum oxide-silicon carbide crystal whisker reinforced cold work die steel material

A technology of cold-working die steel and silicon carbide whiskers, which is applied in the field of die steel materials, can solve problems such as short service life of dies, achieve improved mechanical properties and wear resistance at room temperature, high process stability, and high structural stability Effect

Active Publication Date: 2016-09-07
SHANDONG JIANZHU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, high-speed steels such as W18Cr4V and W6Mo5Cr4V2 are mainly used for cold forging in the world, but there is a problem of short service life of dies

Method used

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Embodiment Construction

[0017] The best embodiment of the present invention is given below: the chemical composition and mass fraction of the base material WCrMoV alloy of the present invention are: Mn: 0.3, W: 18.5, Mo: 2.5, Cr: 4.0, V: 1.0, and the rest is Fe. After it is melted and overheated to 1900°C, the slag is removed, modified, refined, and cast into a mold; the alloy melt is heated to 1950°C, and the mixed powder (polytetrachloroethylene, Iron powder catalyst 10% + alumina powder, silicon powder and carbon black 90%) are blown into the vacuum melting furnace, and naturally fall into the alloy melt after self-propagating reaction, the gas pressure is 0.1Mpa, and the gas flow rate is 0.05 m 3 / Min, the time is 10 minutes, the amount of mixed powder added is 5% of the weight of the alloy melt, and then undergoes modification and refining treatment, pours the mold, heats it again, and pours the mold at 20 minutes, 40 minutes, and 80 minutes respectively. T6 treatment is then carried out, and pe...

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Abstract

The invention belongs to the field of die steel materials, and particularly relates to a making method for an aluminum oxide-silicon carbide crystal whisker reinforced cold work die steel material. Aluminum oxide-silicon carbide crystal whisker reaction precursor powder is blown into WCrMoV melt in a vacuum melting furnace through nitrogen and carbon dioxide; during a blowing process, self-propagating combustion synthesis reaction is caused, so that nanometer aluminum oxide-silicon carbide crystal whiskers and a small amount of carbon and silicon are obtained; and then the aluminum oxide-silicon carbide crystal whisker reinforced cold work die steel material is obtained through mechanization mixing and blending, modification treating, refining and pouring. The reinforcing nanometer crystal whiskers are small in diameter size, uniform in distribution and high in texture stability, is contamination-free on the surface, and is well combined with the WCrMoV substrate. The room-temperature mechanical property and wear-resisting property of the material are obviously improved; and the material is especially suitable to application of cold work die alloy steel, drill bits, cutters and the like.

Description

technical field [0001] The invention belongs to the field of die steel materials, in particular to a method for preparing aluminum oxide-silicon carbide nano-whisker reinforced cold-working die steel materials. Background technique [0002] Forging technology is an important link in industrial production. At present, the service life of forging dies accounts for 20% of the cost of the entire forging product. The amount of cold work die steel used in cold forging, cold extrusion, upsetting, drawing and other die Very large, cold work die steel requires high hardness and wear resistance, among which high hardness (HRC≥58-64) can ensure that the mold itself does not deform and crack when the material being processed is deformed, and has high wear resistance The advantage is that the mold will not lose its shape after long-term use. High wear resistance is based on high hardness. At the same time, sufficient strength and toughness are required. High strength will increase the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C47/00C22C49/08C22C49/14C22C101/00
CPCC22C33/04C22C47/00C22C49/08C22C49/14
Inventor 徐淑波周玉林雷启腾
Owner SHANDONG JIANZHU UNIV
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