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Stainless steel-TiC nano composite powder and preparation method

A nano-composite, stainless steel technology, applied in the field of nano-composite material powder, to achieve the effect of easy realization, high Young's modulus, and simple process

Inactive Publication Date: 2007-09-19
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, there is no report on nanocomposite powder with excellent properties of 316 stainless steel and TiC ceramics

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Using 316 stainless steel powder, Ti powder and C powder as raw materials, the average particle size of Ti powder and C powder is less than 74um, the purity of Ti powder and C powder is >99%, and the average particle size of 316 stainless steel powder is less than 34um. According to the mass percent of 316 stainless steel powder and Ti powder and C powder is: 316 stainless steel powder 90wt%, Ti powder and C powder 10wt% batching mixes (in ball milling process, Ti powder and C powder take place reaction in situ to form TiC, i.e. TiC The mass percent of Ti powder and C powder is: 10wt%); Wherein the mass percent of Ti powder and C powder accounted for by Ti powder and C powder is: Ti powder 80wt%, C powder 20wt%. After mixing, the QM-SB planetary ball mill manufactured by Nanjing University is used for high-energy ball milling. Stainless steel balls are used as the ball milling medium, with a diameter of ф6mm; ), the ball milling method is dry ball milling, and the ball ...

Embodiment 2

[0019] Using 316 stainless steel powder, Ti powder and C powder as raw materials, the average particle size of Ti powder and C powder is less than 74um, the purity is >99%, and the average particle size of 316 stainless steel powder is less than 34um. According to the mass percent of 316 stainless steel powder and Ti powder and C powder is: 316 stainless steel powder 80wt%, Ti powder and C powder 20wt% batching mixes (in ball milling process, Ti powder and C powder react in situ to form TiC); Wherein The mass percentages of Ti powder and C powder in Ti powder and C powder are: Ti powder 80wt%, C powder 20wt%. After mixing, the QM-SB planetary ball mill manufactured by Nanjing University is used for high-energy ball milling. Stainless steel balls are used as the ball milling medium, with a diameter of ф6mm; the ball-material ratio is 30:1 (mass ratio), and the speed is 300 rpm. Dry ball milling, the ball milling atmosphere is vacuum (vacuum degree not higher than 100 Pa); after...

Embodiment 3

[0021] 316 stainless steel powder, Ti powder and C powder are used as raw materials, the average particle size of Ti powder and C powder is less than 74um, the purity is >99%, and the average particle size of 316 stainless steel powder is less than 34um. According to the mass percent of 316 stainless steel powder and Ti powder and C powder is: 316 stainless steel powder 70wt%, Ti powder and C powder 30wt% batching mixes (in ball milling process, Ti powder and C powder react in situ to form TiC); Wherein The mass percentages of Ti powder and C powder in Ti powder and C powder are: Ti powder 80wt%, C powder 20wt%. After mixing, use the QM-SB planetary ball mill manufactured by Nanjing University to carry out high-energy ball milling. Select stainless steel balls as the ball milling medium, with a diameter of ф6mm; the ball-material ratio is 35:1 (mass ratio), and the speed is 350 rpm. Dry ball milling, the ball milling atmosphere is vacuum (vacuum degree is not higher than 100 P...

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Abstract

The invention relates to a stainless steel-ceramics nanometer composite material. The stainless steel-TiC nanometer composite powder is characterized in that it is obtained by mixing 316 stainless steel powder, Ti powder and C powder and ball milling, in which: 316 stainless steel powder of 70-90 wt%, Ti powder and C powder of 10-30 wt%, wherein, 80 wt% Ti powder and 20 wt% C powder of Ti powder and C powder, with less than 74um of average grading of Ti powder and C powder, and more than 99% of the purity. The composite material produced by the method has good corrosion resistance, good abrasion resistance, high Young's modulus, high chemical stability and long service life with simple process. Fine crystal grain powder metallurgy composite material produced by molding and sintering at high temperature the powder produced by the method has the advantages of corrosion resistance, abrasion resistance, high Young's modulus, high chemical stability and long service life.

Description

technical field [0001] The invention belongs to the technical field of nanocomposite material powder, and in particular relates to a stainless steel-ceramic nanocomposite material and a preparation method thereof. Background technique [0002] Stainless steel is a large class of high-tech special steel, and its production process can be produced by rolling and powder metallurgy. Stainless steel materials have many special properties such as corrosion resistance, wear resistance, long life, oxidation resistance, etc., and occupy an important position in the national economy. Grain refinement is one of the important methods to improve the performance of materials [1、2、3] , At the same time, the mechanical strength of the material can also be effectively improved by using the second phase particle strengthening method. TiC ceramics are very stable interstitial compounds with high melting point, high hardness, high Young's modulus, high chemical stability, wear and corrosion r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/05B22F9/04
Inventor 陈文怡周健
Owner WUHAN UNIV OF TECH
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