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TiC/316L composite and preparing method thereof

A technology of composite materials and materials, applied in metal processing equipment, transportation and packaging, etc., can solve problems such as poor mechanical properties of composite materials

Active Publication Date: 2018-08-10
HUAIHAI INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In the prior art, powder metallurgy techniques such as compression molding are often used to prepare TiC / 316L composite parts, and the prepared composite materials have poor mechanical properties

Method used

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  • TiC/316L composite and preparing method thereof
  • TiC/316L composite and preparing method thereof
  • TiC/316L composite and preparing method thereof

Examples

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preparation example Construction

[0029] The invention provides a kind of preparation method of TiC / 316L composite material, comprises the following steps:

[0030] (1) TiC and 316L stainless steel powder are mixed and dried to obtain mixed powder;

[0031] (2) mixing the mixed powder obtained in step (1) with a binder to obtain a mixed material;

[0032] (3) performing granulation and injection molding on the mixed material obtained in step (2) successively to obtain a shaped green body;

[0033] (4) Degreasing and sintering the shaped body obtained in step (3) to obtain a TiC / 316L composite material.

[0034] In the present invention, TiC and 316L stainless steel powder are mixed and dried to obtain mixed powder. In the present invention, the weight percentage of TiC in the mixed powder is preferably 5-8%, more preferably 6-7%; the weight percentage of 316L stainless steel powder in the mixed powder is preferably 92-95%, more preferably 93-94%.

[0035] In the present invention, the 316L stainless steel ...

Embodiment 1

[0063] Mix TiC with a mass percentage of 5% and 316L stainless steel powder with a mass percentage of 95% in a three-dimensional mixing powder machine, the mixing time is 1.5h, and the mixing speed is 20r / min; the TiC / 316L mixture is carried out in a dry box Dry to obtain mixed powder; wherein the drying temperature is 20°C, and the drying time is 1.5h;

[0064] According to the percentage by weight, paraffin wax: high-density polyethylene: stearic acid = 65%: 30%: 5% is formulated as a binder. First, put the binder into the mixing chamber and knead for 10 minutes. One-third of the TiC / 316L mixed powder continued to knead for 15 minutes, when the kneading was uniform, continue to add one-third of the TiC / 316L mixed powder and continued kneading for 15 minutes, and when the kneading was even, continue to add one-third of the TiC / 316L The mixed powder was continuously kneaded for 20 minutes to obtain a kneaded material; wherein, the total time of kneading was 1 h; the kneading t...

Embodiment 2

[0073] Mix TiC with a mass percentage of 5.5% and 316L stainless steel powder with a mass percentage of 94.5% in a three-dimensional mixing powder machine, the mixing time is 2h, and the mixing speed is 21r / min; the TiC / 316L mixture is carried out in a dry box Dry to obtain mixed powder; wherein, the drying temperature is 20°C, and the drying time is 1.2h;

[0074] According to the percentage by weight, it is paraffin wax: high-density polyethylene: stearic acid = 70%: 28%: 2% to prepare a binder, first put the binder into the mixing chamber and knead for 15 minutes, and then add Continue to knead 1 / 3 of the mixed powder for 15 minutes. When the kneading is uniform, continue to add 1 / 3 of the mixed powder and continue kneading for 10 min. Refining material; Wherein, the total time of described mixing is 1h; Described mixing temperature is 145 ℃;

[0075] The mixed material is granulated to obtain granular materials with a particle size of 4mm; the granular materials are injec...

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Abstract

The invention provides a TiC / 316L composite and a preparing method thereof, and belongs to the field of metal materials. The method comprises the following steps that TiC and 316L stainless steel powder are mixed and dried, and mixed powder is obtained; the mixed powder and a binding agent are mixed, and a mixed material is obtained; the mixed material is subject to granulation and injection forming in sequence, and a formed blank body is obtained; the formed blank body is subject to degreasing and sintering, and the TiC / 316L composite is obtained; the TiC / 316L composite has the good mechanical property, the hardness ranges from 238 to 288 HV, the tensile strength ranges from 502 to 508 MPa, the friction coefficient ranges from 0.55 to 0.70, the wear amount is reduced by 10 to 14% comparedwith the same-process pure 316 L stainless steel sintering test part, the corrosion current density ranges from 0.0079 to 0.0167mA / cm<2> in the 3.5% NaCl solution, and the corrosion potential is -0.706 to -0.676V.

Description

technical field [0001] The invention relates to the field of metal materials, in particular to a TiC / 316L composite material and a preparation method thereof. Background technique [0002] As a modern structural material, 316L stainless steel plays an important role in industrial development and technological progress. 316L stainless steel is an austenitic stainless steel with superior mechanical properties. Because of its nonmagnetic and excellent welding performance, it is widely used in many fields such as machinery, chemical industry, marine, light industry and petroleum. With the continuous development of modern industry, the requirements for the performance of 316L stainless steel materials are also constantly increasing. Equipment using 316L stainless steel in high temperature, high pressure and other environments are often scrapped due to inner wall wear and oxidation corrosion, and the life of the machine is severely shortened. 316L stainless steel belongs to aust...

Claims

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Application Information

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IPC IPC(8): B22F3/22B22F1/00B22F3/10
CPCB22F3/1017B22F3/1025B22F3/225B22F2998/10B22F1/103B22F1/10
Inventor 乔斌尚峰张洪涛李化强贺毅强
Owner HUAIHAI INST OF TECH
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