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Composite dipper tooth of excavator and manufacturing method thereof

A technology for excavators and bucket teeth, which is applied in the field of new excavator composite bucket teeth and its preparation, can solve the problems of reduced usage of cermet wear-resistant materials, insufficient bonding force of bucket teeth matrix, peeling, etc., and achieves improved wear resistance , Save rare strategic metal resources, improve the effect of binding force

Inactive Publication Date: 2011-09-14
CHINA UNIV OF GEOSCIENCES (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The novel excavator composite bucket tooth proposed by the present invention adopts high-hardness and high-strength cermet material tooth tips, and the wear resistance of the bucket teeth is enhanced, and because of the new intermittent structure, the consumption of cermet wear-resistant materials is reduced, which is conducive to reducing precious and rare materials. Use of strategic metals and reduce production costs; another purpose of the present invention is to solve the problem that the surfacing layer or inserts of the surfacing bucket teeth and insert bucket teeth peel off due to insufficient bonding force with the bucket tooth matrix during use

Method used

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  • Composite dipper tooth of excavator and manufacturing method thereof
  • Composite dipper tooth of excavator and manufacturing method thereof
  • Composite dipper tooth of excavator and manufacturing method thereof

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preparation example Construction

[0029] The preparation method comprises the following process steps and contents:

[0030] (1) Prefabrication of racks:

[0031] 1) Weighing: Weigh the matrix powder, metal binder, grain inhibitor and toughener according to the formula ratio;

[0032] 2) Mixing: Put the matrix powder, metal binder powder, and grain inhibitor powder weighed in proportion into a high-energy stirring ball mill tank, and add organic dispersant, adhesive, and cemented carbide mill in proportion. Balls and absolute ethanol solvent, stirring and ball milling for 12 to 72 hours. Then add hardening agent in proportion to ball milling for 0.5-1 hour, then add toughening agent and ball mill for 20-40 minutes;

[0033] 3) Drying: In a vacuum drying oven, dry the finely mixed slurry for 3 to 48 hours at 10 to 100°C and a vacuum of 0 to -0.5Pa;

[0034] 4) Grinding and sieving: Grinding the dried powder, and selecting a sieve with a suitable aperture for sieving;

[0035] 5) Loading: Put the weighed raw...

Embodiment 1

[0048] The manufacturing method and technological process of the novel excavator composite bucket teeth according to the embodiment of the present invention are as follows:

[0049] Step 1, the preparation of tooth bar:

[0050] 1) Weighing; Submicron WC powder by mass fraction 79%, 7% Mo powder, 12% surface Mo-coated diamond powder, 1% VC, 1% Mo-coated SiC nano-whiskers, and additional 5% organic dispersant and binder Weigh each reagent.

[0051] 2) Mixing: Add the weighed raw material WC powder, metal binder powder, grain inhibitor powder, organic dispersant and binder into a high-energy stirring ball mill tank, and add 10 times the mass of WC grinding balls and 5 times the mass of anhydrous ethanol solvent, stirred and ball milled for 48 hours. Then add the weighed hardening agent and ball mill for 1 hour, then add the toughening agent and ball mill for another 20 minutes.

[0052] 3) Drying: In a vacuum drying oven, dry the finely mixed slurry for 30 hours at 40° C. and...

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Abstract

The invention relates to a composite dipper tooth of an excavator and a manufacturing method thereof, belonging to the field of high-tech engineering materials and application thereof. The novel composite dipper tooth comprises two parts of a bar type tooth tip (tooth bar) and a dipper tooth substrate (tooth substrate) and is formed by high temperature casting. The tooth bar material is novel high-rigidity and high-strength composite metal ceramics and comprises one or more of WC, TiCN, TiN or TiC-based composite metal ceramics; the tooth substrate is high / low chrome alloy steels or high manganese steels with higher rigidity and strength; a composite dipper tooth structure comprises a plurality of tooth bars of wedge shapes, the tooth bars are embedded at the front end of the tooth substrate, and a small section of each tooth bar is exposed out of a steel body, and a certain distance is arranged between tooth bars. The manufacturing method of the composite dipper tooth of the excavator sequentially comprises the following steps of: prefabricating the tooth bars; smelting alloy steels; casting the composite dipper tooth; and demolding. The tooth bar material is characterized by high rigidity, high strength and wearing resistance; the wearing resistance of the dipper tooth is improved and the consumption of wearing materials is reduced due to an intermittent structure, raw materials are saved, the cost is lowered, a contact area between the tooth bars and the tooth substrate is increased, the binding force is improved and the service life of the dipper tooth is prolonged.

Description

technical field [0001] The invention relates to a novel composite bucket tooth of an excavator and a preparation method thereof, belonging to the field of high-tech engineering materials and their applications. Background technique [0002] Excavator bucket teeth are in direct contact with rock, soil, ore, etc. during mining, geological exploration, and infrastructure construction. The most wearable part of the excavator, each excavator consumes a large amount of bucket tooth accessories every year. According to relevant statistics, in 2005, the 2m 3 There are 2,000 to 2,500 large mining excavators above, and the direct economic loss of bucket teeth reaches about 30 million yuan per year; at the same time, the indirect economic losses caused by equipment damage, shutdown, and production stoppage are even greater. [0003] In order to improve the wear resistance of bucket teeth, scholars at home and abroad have conducted a lot of research: one method is to improve the mecha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02F9/28B22D19/00
Inventor 彭志坚任小勇于立安荣会永彭瑛王成彪付志强岳文
Owner CHINA UNIV OF GEOSCIENCES (BEIJING)
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