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Method for preparing wear-resisting netty Cr3C2 reinforced NiAl alloy

A wear-resistant and reticulated technology, which is applied in the field of preparation of wear-resistant reticulated Cr3C2 reinforced NiAl alloys, can solve the problems that NiAl alloys are difficult to meet mechanical properties and wear resistance in a wide temperature range, so as to avoid the tendency to grow , suitable sintering temperature and excellent wear resistance

Active Publication Date: 2019-03-15
青岛市资源化学与新材料研究中心 +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention provides a wear-resistant reticular Cr 3 C 2 The preparation method of reinforced NiAl alloy solves the technical problem in the prior art that it is difficult for NiAl alloy modified by traditional methods to meet the common requirements of mechanical properties and wide temperature range wear resistance

Method used

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  • Method for preparing wear-resisting netty Cr3C2 reinforced NiAl alloy
  • Method for preparing wear-resisting netty Cr3C2 reinforced NiAl alloy
  • Method for preparing wear-resisting netty Cr3C2 reinforced NiAl alloy

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preparation example Construction

[0026] A wear-resistant mesh Cr 3 C 2 The preparation method of reinforced NiAl alloy, the steps are as follows:

[0027] 1) Ball milling

[0028] Weigh Ni-packed graphite powder, Ni powder, Al powder and Cr powder respectively, put all the above components into a WC ball mill tank and carry out ball milling to obtain a uniformly mixed original powder product;

[0029] 2) SPS sintering

[0030] The product obtained in step 1) is packed into a graphite mold, then placed in an SPS discharge plasma sintering furnace, and the vacuum degree is lower than 5×10 -3 Sintering is carried out under Pa. After sintering, the material is cooled to room temperature with the furnace to obtain wear-resistant reticulated Cr 3 C 2 Reinforced NiAl alloy.

[0031] By selecting the element raw materials of the ceramic phase in the raw materials, and on the basis of the large formation temperature difference between the preferentially formed phase and the post-formed phase, the repulsive effec...

Embodiment 1

[0038] Abrasion Resistant Mesh Cr 3 C 2 Preparation method of reinforced NiAl alloy:

[0039] Ball milling: select Ni-packed graphite powder, Ni powder, Al powder and Cr powder, and combine the above four components according to the atomic percentage composition (NiAl) 0.85 (Cr 3 C 2 ) 0.15 Weigh the powder, wherein the Ni-coated graphite powder is 200 mesh, the Ni powder is 400 mesh, the Al powder is 200 mesh, and the Cr powder is 400 mesh. Put the weighed powder into a WC (tungsten carbide) ball mill tank for ball milling, WC balls are used as grinding balls, the ball-to-material ratio is 2:1, and then mix for 8 hours at a speed of 300r / min under the protection of argon , to obtain a homogeneously mixed original powder product.

[0040] SPS sintering: put the mixed powder into a graphite mold, and then place it in an SPS discharge plasma sintering furnace for sintering. The sintering parameters are: the vacuum degree is lower than 5×10 -3 Pa, the heating rate is 10°C / mi...

Embodiment 2

[0043] Abrasion Resistant Mesh Cr 3 C 2 Preparation method of reinforced NiAl alloy:

[0044] Ball milling: select Ni-packed graphite powder, Ni powder, Al powder and Cr powder, and mix the above four components according to atomic percentage (NiAl) 0.85 (Cr 3 C 2 ) 0.15 Weigh the powder. Wherein, the Ni-coated graphite powder is 200 mesh, the Ni powder is 400 mesh, the Al powder is 200 mesh, and the Cr powder is 400 mesh. Put the weighed powder into a WC (tungsten carbide) ball mill jar for ball milling, WC balls are used as grinding balls, the ball-to-material ratio is 3:1, and then mix at a speed of 200r / min under argon protection for 10h , to obtain a homogeneously mixed original powder product.

[0045] SPS sintering: put the mixed powder into a graphite mold, and then place it in an SPS discharge plasma sintering furnace for sintering. The sintering parameters are: the vacuum degree is lower than 5×10 -3 Pa, the heating rate is 15°C / min, the sintering temperature...

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Abstract

The invention discloses a method for preparing a wear-resisting netty Cr3C2 reinforced NiAl alloy. The wear-resisting netty Cr3C2 reinforced NiAl alloy is prepared from Ni powder, Al powder, Cr powderand Ni covered graphite powder through ball milling and the SPS sintering technology. The alloy prepared through the method is simple in structure, and a three-dimensional netty Cr3C2 ceramic reinforced phase is constructed in a NiAl intermetallic compound matrix of an isometric crystal structure. The method is simple in process operation and low in cost, the prepared material has high yield strength and excellent wear resistance at the temperature of room temperature to 800 DEG C, and wide industrial application prospects are achieved.

Description

technical field [0001] The invention relates to the technical field of wear-resistant materials in a wide temperature range, in particular to a wear-resistant reticular Cr 3 C 2 The preparation method of reinforced NiAl alloy, the material prepared by using the method of the invention has high yield strength, has excellent wear resistance in the temperature range of room temperature to 800°C, and can be obtained as a long-term wear-resistant material in a wide temperature range widely used. Background technique [0002] With the rapid development of modern industry, people have higher and higher requirements for the service stability and service life of key moving parts. Wear is one of the main causes of component failure. For high-temperature materials, the service environment is becoming more and more harsh, and the service temperature is getting higher and higher, which leads to a significant decrease in the strength of the material and accelerates the failure of parts...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C19/05C22C32/00C22C1/05C22C1/10B22F3/105
CPCB22F3/105C22C1/058C22C19/007C22C19/058C22C32/0052
Inventor 于源乔竹辉杨军刘维民谈辉程军朱圣宇
Owner 青岛市资源化学与新材料研究中心
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