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High-performance carbon ceramic friction welding stirring head and preparation method thereof

A friction welding and stirring head technology, applied in welding equipment, non-electric welding equipment, manufacturing tools, etc., can solve the problems of insufficient toughness, poor wear resistance, and unsatisfactory characteristics, and achieve the retention of strength, toughness, and hardness and excellent mechanical properties

Active Publication Date: 2019-05-31
ANHUI HONGCHANG NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, the commonly used stirring head materials are mainly divided into three categories: superalloy, cemented carbide and ceramic materials. These materials can meet or even exceed the use requirements in some characteristics, but there are always certain characteristics that cannot meet the requirements.
For example, the high temperature strength of superalloy meets the requirements, but its hardness is low and its wear resistance is poor; the wear resistance of cemented carbide meets the requirements, but its high temperature strength does not meet the requirements; the wear resistance and heat resistance of ceramic materials meet the requirements requirements, but its toughness does not meet the requirements

Method used

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  • High-performance carbon ceramic friction welding stirring head and preparation method thereof

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Effect test

Embodiment 1

[0034] The impregnating agent used in this embodiment consists of the following composition ratios in parts by mass:

[0035] 80 parts of polycarbosilane, 30 parts of xylene, 10 parts of DVB (divinylbenzene). The average molecular weight of the polycarbosilane used is 1200, and the softening point is 175° C.; the content of DVB (divinylbenzene) used is 55%.

[0036] In this example, with Cf / C Composite material green body is the processing object; the volume density of its carbon fiber prefabricated body is 0.45g / cm 3 , C f / C Composite body density is 1.25g / cm 3 .

[0037] Its operation steps are:

[0038] Step 1. Polish C with sandpaper f On the surface of the / C composite material blank, the surface dust is sucked by a vacuum cleaner, then soaked in absolute ethanol, ultrasonically cleaned for 30-60 minutes, dried and placed in a pressure impregnation tank. After the pressure impregnation tank is sealed, it is vacuumed, Under the condition that the vacuum degree is l...

Embodiment 2

[0051] The impregnating agent used in this embodiment consists of the following composition ratios in parts by mass:

[0052] 80 parts of polycarbosilane, 30 parts of xylene, 10 parts of DVB (divinylbenzene). The average molecular weight of the polycarbosilane used is 1500, and the softening point is 185° C.; the content of DVB (divinylbenzene) used is 55%.

[0053] In this example, with C f / C composite body is the processing object; the volume density of its carbon fiber preform is 0.50g / cm 3 , C f / C composite body density is 1.30g / cm 3 .

[0054] Its operation steps are:

[0055] Step 1. Polish C with sandpaper f On the surface of the / C composite material blank, the surface dust is sucked by a vacuum cleaner, then soaked in absolute ethanol, ultrasonically cleaned for 30-60 minutes, dried and placed in a pressure impregnation tank. After the pressure impregnation tank is sealed, it is vacuumed, Under the condition that the vacuum degree is lower than 10Pa, suck the...

Embodiment 3

[0068] The impregnating agent used in this embodiment consists of the following composition ratios in parts by mass:

[0069] 80 parts of polycarbosilane, 30 parts of xylene, and 10 parts of DVB (divinylbenzene). The average molecular weight of the polycarbosilane used is 1800, the softening point is 195° C., and the content of DVB (divinylbenzene) used is 55%.

[0070] In this example, with C f / C Composite material green body is the processing object; the volume density of its carbon fiber prefabricated body is 0.55g / cm 3 , C f / C composite body density is 1.40g / cm 3 .

[0071] Its operation steps are:

[0072] Step 1. Polish C with sandpaper f On the surface of the / C composite material blank, the surface dust is sucked by a vacuum cleaner, then soaked in absolute ethanol, ultrasonically cleaned for 30-60 minutes, dried and placed in a pressure impregnation tank. After the pressure impregnation tank is sealed, it is vacuumed, Under the condition that the vacuum degree...

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Abstract

The invention discloses a high-performance carbon ceramic friction welding stirring head and a preparation method thereof. The preparation method comprises the following steps: manufacturing a friction welding stirring head primary blank; pretreating the Cf / C composite friction welding stirring head primary blank; densifying the Cf / C composite friction welding stirring head primary blank; and preparing a SiC coating of a Cf / C-SiC composite friction welding stirring head pre-finished product.The high-performance carbon ceramic friction welding stirring head and a preparation method thereof belongs to the technical field of ceramic-based composite material preparation, and the high-performance carbon ceramic friction welding stirring head and the preparation method thereof ensure that residual free carbon and free silicon in the material fully react, and simultaneously remove other impurities, so that the hardness and the wear resistance of the Cf / C-SiC composite material friction welding stirring head are greatly improved; a layer of compact SiC coating can be prepared on the surface of the material through further SiC deposition treatment, the oxidation resistance of the stirring head at high temperature is greatly improved; meanwhile, the purity of surface silicon carbide is more than 99%, the surface hardness is further improved, and the service life of the stirring headis greatly prolonged.

Description

technical field [0001] The invention relates to the technical field of preparation of ceramic-based composite materials, in particular to a high-performance carbon-ceramic friction welding stirring head and a preparation method thereof. Background technique [0002] Friction welding is a method of using the heat generated by the mutual movement and friction of the workpiece ends to make the ends reach a thermoplastic state, and then quickly upset to complete the welding. During the welding process, no other welding consumable materials, such as welding rod, welding wire, flux and shielding gas, etc. are required. The only thing consumed is the welding stirring head, which is one of the most important components in the friction stir welding machine. [0003] In friction welding, the stirring head mainly has the following functions: heating and softening the material to be welded; breaking and dispersing the oxide layer on the surface of the joint; driving the material in fron...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/84C04B35/83C04B35/80C04B41/87B23K20/12
Inventor 蔡昌海肖孝天洪亮王锋黄猛
Owner ANHUI HONGCHANG NEW MATERIAL CO LTD
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