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Sialon ceramic friction welding stirring head and production method thereof

A friction welding and stirring head technology, applied in the field of Sialon ceramic friction welding stirring head and its preparation, can solve the problems of low yield, difficult processing, high manufacturing cost, and achieve long service life, low price, and reduced manufacturing cost. Effect

Active Publication Date: 2017-03-22
HUNAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, Sialon ceramic is a hard phase, which is difficult to process and has a low yield. Therefore, the current Sialon ceramic stirring head also has the problem of high manufacturing cost. It is urgent to develop a Sialon ceramic stirring head net size molding process to reduce manufacturing costs.

Method used

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  • Sialon ceramic friction welding stirring head and production method thereof
  • Sialon ceramic friction welding stirring head and production method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0040] A process for preparing a sialon ceramic friction welding stirring head, comprising the following steps:

[0041] S1. Prepare sialon ceramic powder: according to the molecular formula Si of sialon ceramics 4 al 2 o 2 N 6 Calculate and weigh the corresponding Si 3 N 4 , AlN and Al 2 o 3 , then add 3wt% Y 2 o 3 , the resulting mixture was ball milled, then dried in an oven at 80°C for 6 hours, and sealed;

[0042] Wherein ball milling also comprises the following steps:

[0043] S11. the corundum of mixed material, different sizes and dehydrated alcohol are packed in the agate ball mill jar according to mass ratio 1:1.5:2;

[0044] S12. Seal the packed ball mill pot and put it into a planetary ball mill for ball milling for 20 hours.

[0045] S2. Gel injection molding:

[0046] S21. Configuration premix: 15wt% N-methylolacrylamide, 9wt% N,N-dimethylethylenediamine and 5vol% ammonium polyacrylate, wherein the ammonium polyacrylate is dissolved in deionized wate...

Embodiment 2

[0054] A process for preparing a sialon ceramic friction welding stirring head, comprising the following steps:

[0055] S1. Prepare sialon ceramic powder: according to the molecular formula Si of sialon ceramics 4 al 2 o 2 N 6 Calculate and weigh the corresponding Si 3 N 4 , AlN and Al 2 o 3 , then add 6wt% Y 2 o 3 , the resulting mixture was ball milled, then dried in an oven at 80°C for 10 hours, and sealed;

[0056] Wherein ball milling also comprises the following steps:

[0057] S11. the corundum of mixed material, different sizes and dehydrated alcohol are packed in the agate ball mill jar according to mass ratio 1:1.5:2;

[0058] S12. Seal the packed ball mill pot and put it into a planetary ball mill for ball milling for 24 hours.

[0059] S2. Gel injection molding:

[0060] S21. Configuration premix: 20wt% N-methylolacrylamide, 10wt% N,N-dimethylethylenediamine and 6vol% ammonium polyacrylate, wherein the ammonium polyacrylate is dissolved in deionized wa...

Embodiment 3

[0068] A process for preparing a sialon ceramic friction welding stirring head, comprising the following steps:

[0069] S1. Prepare sialon ceramic powder: according to the molecular formula Si of sialon ceramics 4 al 2 o 2 N 6 Calculate and weigh the corresponding Si 3 N 4 , AlN and Al 2 o 3 , then add 4wt% Y 2 o 3 , the resulting mixture was ball-milled, then dried in an oven at 80°C for 7 hours, and sealed;

[0070] Wherein ball milling also comprises the following steps:

[0071] S11. the corundum of mixed material, different sizes and dehydrated alcohol are packed in the agate ball mill jar according to mass ratio 1:1.5:2;

[0072] S12. Seal the packed ball mill pot and put it into a planetary ball mill for ball milling for 21 hours.

[0073] S2. Gel injection molding:

[0074] S21. Configuration premix: 16wt% N-methylolacrylamide, 10wt% N,N-dimethylethylenediamine and 6vol% ammonium polyacrylate, wherein the ammonium polyacrylate is dissolved in deionized wat...

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Abstract

The invention relates to the technical field of friction welding stirring heads, and discloses a sialon ceramic friction welding stirring head and a production method thereof. The friction welding stirring head is creatively produced from sialon ceramic, the sialon ceramic has good toughness, very high hardness, very high wear resistance and very high high-temperature oxidation resistance, and raw materials of the sialon ceramic have low prices and wide sources. A traditional ceramic technology and high-molecular chemistry are organically combined, a high-molecular polymer polymerization technology is introduced to a ceramic production technology, and a gel injection molding technology is adopted, so compared with other molding technologies, the method disclosed in the invention has the substantial advantages of short production time, low die and device requirements, low cost, and high structure and component designability; the density of the above product is uniform; a green body has a high strength, and is convenient for machining; and the method is especially suitable for realizing near-net-shape forming, realizes small product shape limitation, can be used to produce complex profiled parts, and is universal and economic.

Description

technical field [0001] The present invention relates to the technical field of friction welding stirring head, and more specifically, relates to a Sialon ceramic friction welding stirring head and a preparation method thereof. Background technique [0002] The rapid development of current high-performance ships not only depends on the application of high-strength new materials such as aluminum alloys, but also depends on the progress of their welding technology. However, high-speed aluminum alloy ships have the problem of welding two dissimilar metals, aluminum and steel. As a new solid-phase joining method, friction stir welding is basically not affected by factors such as material physical and chemical properties, mechanical properties, and crystal structure. For dissimilar materials The welding has great advantages. Therefore, friction stir welding is the preferred connection technology to solve the current high-speed ship aluminum-steel welding problems. [0003] Stirr...

Claims

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Application Information

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IPC IPC(8): C04B35/599C04B35/622C04B35/64C04B35/634B28B1/14
Inventor 银锐明周伟
Owner HUNAN UNIV OF TECH
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