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Reinforced iron-base alloy and method for preparing same

A technology of iron-based alloys and iron-copper alloys, which is applied to the raw material selection, composition design and preparation of powder metallurgy Fe-based alloys. Easy promotion and application, easy technology transformation, and the effect of promoting diffusion

Inactive Publication Date: 2005-01-19
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method also has some disadvantages. Due to the difference in the density of alloying element powder and Fe, it is difficult to obtain a mixture with uniform distribution of alloying elements.
At the same time, the subsequent treatment of the mixture is also prone to segregation and deposition effects, which may lead to uneven chemical composition of each part

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0026] Raw material selection and formula: 100-mesh iron powder produced by Wuhan Iron and Steel Powder Metallurgy Co., Ltd., commercially available 200-mesh pure copper powder, graphite powder (≤30μm graphite powder ≥95%wt.%), -200-mesh zinc stearate, alloying element Cr It is added in the form of high-carbon Cr-Fe powder, and the composition of high-carbon chromium-iron powder is 60-65wt.% of chromium, 5-7wt.% of carbon, and the balance of iron Fe. Specifically used in this implementation: Cr is 64.5wt.%, C is 6.05wt.%, Fe is the balance, and the average particle size is 8.05 μm. The composition of the powder metallurgy Fe-based alloy is: 3wt.% of Cu, 1wt.% of graphite, 1.5wt.% of Cr, 0.5wt.% of lubricant, and the balance of Fe. The materials are mixed in a ball mill, the rotating speed of the ball mill is 60-90 rpm, and the mixing time is 1-2 hours.

[0027] The mixed material is unidirectionally pressed to form a green body, and the pressing pressure is 5-6 tons / cm 2 , k...

Embodiment 2

[0036] The difference between this embodiment and the above-mentioned embodiment 1 is that in order to improve the wear resistance of the product, silicon carbide SiC powder is also included in the composition of the powder metallurgy iron-based alloy, and the added amount is 1-3wt%, and the specific preparation It is directly added according to the proportion during the mixing process.

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Abstract

The invention discloses a reinforced iron-base alloy and method for preparing same, wherein the powder metallurgy iron-copper alloy (FTG70Cu3-35) is added with alloy elements Cr, which is in the form of high carbon ferro-chrome (CR-Fe) alloy powder.

Description

Technical field: [0001] The invention belongs to a method for manufacturing powder metallurgy Fe-based materials, in particular to raw material selection, component design and preparation methods for manufacturing relatively high-strength powder metallurgy Fe-based alloys by adding alloy elements. Background technique: [0002] Powder metallurgy Fe-based material products have broad application prospects in the fields of automobiles, machinery, chemicals, electrical appliances and electronics. Traditional powder metallurgy Fe-based material products have the disadvantages of low mechanical properties and poor reliability, which seriously restricts the development of powder metallurgy industry. At present, the development of powder metallurgy Fe-based materials at home and abroad is developing in the direction of alloying, and the alloying elements added are changing from Ni, Mo, Cu and other alloy elements with low oxygen affinity to Cr, Mn, V and other alloys with high oxyg...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C33/02C22C38/20
Inventor 郑治祥汤文明丁厚福程继贵刘君武吕珺
Owner HEFEI UNIV OF TECH
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